Class / Patent application number | Description | Number of patent applications / Date published |
340552000 | Disturbance of electromagnetic waves | 74 |
20080204228 | High-Frequency Monitoring System - The invention relates to a high-frequency monitoring system comprising an emission unit ( | 08-28-2008 |
20080218339 | System and method for improving microwave detector performance using ranging microwave function - Embodiments of the present invention are directed to a method and system for use of ranging MW to decrease MW intrusion detector false alarms. A Doppler microwave system may be provided that is capable of detecting an object range and adjusting the sensitivity of an alarm stage of a MW detector to account for object size and range. Multiple range limited MW stages may be configured for different ranges to determine the general range of the moving object. Based on signal levels present on these MW stages, an approximate object range may be determined. The sensitivity of the MW alarm stage is then adjusted based on a MW alarm state sensitivity vs. object range function that is optimized to alarm on humans and ignore small animals and insects. The method and system may be used in detection systems incorporating a MW sensor. | 09-11-2008 |
20080231444 | Obstruction Detection Device - The invention provides an obstruction detection device. It comprises a light guide having at least one groove formed into one of the light-guiding surfaces of the light guide. A light emitter is provided for emitting light into the light guide, and at least one light detector is provided for detecting the intensity of light transmitted through the light guide and/or which is reflected by at least one groove inside the light guide. Further, the obstruction detection device comprises an output device for outputting an alarm signal when an absolute difference between the intensity and a reference value exceeds a threshold value. | 09-25-2008 |
20080258914 | Monitoring apparatus - A position detection sensor using electromagnetic wave ( | 10-23-2008 |
20080303664 | SCREENING CHECKPOINT FOR PASSENGERS AND BAGGAGE - An advanced technology screening checkpoint system includes a baggage screening zone, a passenger screening zone, and a secondary screening zone. The baggage screening zone may include an explosives scanning system and an imaging system, while the passenger screening zone may include an explosives detection portal and a self-divestment portal to show passengers what to divest prior to screening by a high sensitivity metal detection portal. In some implementations, a secondary screening zone includes a sealed-bottle scanning system, an enhanced explosives detection system, a weapons search routine, and a body scanning system. Centralized monitoring of screening results for individual detection and screening systems of the baggage, passenger, and secondary screening zones may be provided by a combined user interface (CUI). | 12-11-2008 |
20080309488 | PASSIVE MICROWAVE FIRE AND INTRUSION DETECTION SYSTEM - A passive microwave receiver array, operating in the one meter to sub-millimeter wavelengths range and including an internationally protected range of frequencies of varying bandwidth, may be used for fire and intrusion detection. One or more receiver array can be used to provide a plurality of frequency ranges that can be detected. In an interior installation, one or more receiver array can be placed inside a wall. In other embodiments, the receiver and array can be in the form of a hand-held or wearable device. This method and apparatus achieves high performance by exploiting conventional low noise amplification block conversion circuits and provides the detection of thermal signals through clear, smoky, misty, or environmentally untenable conditions as well as the detection of fire and intrusion events through a non-metallic wall. | 12-18-2008 |
20080316025 | SENSIBLE MOTION DETECTOR - According to some embodiments, an apparatus having a first sensor having a first adjustable lens and a second sensor having a second adjustable lens is disclosed. A controller is coupled to the first sensor and the second sensor. The controller is to cause the first sensor and the second sensor to operate independently in a first mode and is to cause the first motion sensor and the second motion sensor to operate interdependently in a second mode. | 12-25-2008 |
20090040046 | Double-end fiber optic security system for sensing intrusions - A security system is disclosed for detecting intrusions at a plurality of predetermined locations having moveable closure members. The system comprises a plurality of intrusion sensors disposed at the locations for detecting movement of the closure members. Primary and secondary optical fiber sensor lines are routed through the intrusion sensors, and primary and secondary scanning units pulse signals along the sensor lines and receive reflected signals back from the sensor lines. A processor processes the reflected signals to determine if a reflection and/or attenuation change has occurred in a reflected pulse signal signifying a prescribed level of unauthorized intrusion activity which matches a signature intrusion signal. In the event of a cut through in the sensor lines, the primary sensor line monitors the sensors downstream of the break, and the secondary sensor line is activated to monitor the sensors downstream of the break. | 02-12-2009 |
20090079563 | Intrusion Detection Sensor - According to an embodiment, an intrusion detection sensor includes a microwave sensor ( | 03-26-2009 |
20090102654 | SYSTEMS AND METHODS FOR OPERATING A SURVEILLANCE SYSTEM - A surveillance system can be designed to take advantage of the disruption of the electromagnetic propagation (EMP) of the radio waves as they propagate through a spatial volume from a transmitter to a receiver. This disruption is well-known in the RF field and is usually removed from becoming a problem in any bidirectional transmission by a variety of sophisticated techniques. Advantage is taken of the fact that the presence and/or movement of objects within the range of the transmission has some effect on the resultant reception. Thus, the disruption of the EMP between two points can be used to provide surveillance information over a wide area. In one embodiment, radios are used that can detect and adapt to changes in the EMP medium and thus are able to adapt to changing circumstances in real-time. | 04-23-2009 |
20090189764 | UNIVERSAL OCCUPANCY ADAPTER - An occupancy adapter for converting any type of security system motion detector into an occupancy-based controller, such as for regulating lighting within a building or controlled space. The occupancy adapter can also be used to provide control to other automated systems within a building or controlled space, such as security systems, HVAC, fire alarms, etc., based on occupancy data. | 07-30-2009 |
20090251317 | INTRUDER DETECTION SYSTEM - An intruder detection system is provided in which a detection range can be set to a predetermined one so that false detection caused by a moving object outside the predetermined range can be diminished. The system includes a transmission-side leaky transmission line that radiates a detection signal for detecting an intruder and a reception-side leaky transmission line that receives a detection signal leaked from the transmission-side leaky transmission line, both of which are buried spaced apart from each other in a detection surveillance area, and detects the presence/absence of an intruder in the detection surveillance area based on variations in the detection signal received by the reception-side leaky transmission line, wherein at least part of either the transmission-side leaky transmission line or the reception-side leaky transmission line is made of a surface-wave-type leaky coaxial transmission line, and the other leaky transmission line, a radiation-type leaky coaxial transmission line. | 10-08-2009 |
20090256706 | Directed Energy Beam Virtual Fence - There is disclosed apparatus and methods for a directed energy beam virtual fence. The directed energy beam virtual fence may include a source unit to provide an energy beam and a sequence of relay units disposed at intervals along the length of the virtual fence. Each relay unit in the sequence may receive the energy beam from a previous unit and may recollimate and redirect the energy beam towards a subsequent unit. | 10-15-2009 |
20090289790 | PORTABLE SELF-CONTAINED ALARM SYSTEM - A secure sealed container and mounting pole house any of a variety of security equipment. Sensing equipment, a high decibel siren, and strobes simulating police lights are removably attachable to a universal mount and control circuit. A control panel connected to the circuit enables and disables the alarm, and monitors system activity. | 11-26-2009 |
20090309724 | Intrusion detection system for underground/above ground applications using radio frequency identification transponders - The present invention is directed to an underground as well as above ground system and method of determining the intrusion into a security zone. One or more transceivers would transmit a unique electromagnetic signal which would power a response from one or more RFID transponders. Each of the transponders would transmit a unique code to the transceiver indicating that there has been no intrusion in the vicinity of that transponder. Failure of a transponder to receive a signal produced by a transponder, would indicate the existence of an intrusion. The transponders as well as the transceivers can be provided in a PVC pipe buried in the ground, or provided in or on a structure located on or above the ground. | 12-17-2009 |
20100019903 | PASSIVE INFRARED DETECTOR - Embodiments of a passive infrared detector can distinguish between an intruder and a small animal passing nearby the detector with a high degree of accuracy without substantially detracting from the ability to detect the intruder within a coverage area farther from the detector. In some embodiments, the passive infrared detector includes a pair of lens assemblies that collect infrared light onto corresponding infrared sensors. Each lens assembly receives light from different spatial regions, which do not overlap near the detector and which substantially overlap farther from the detector. The passive infrared detector also includes a controller that is capable of distinguishing between an intruder and a small animal based on simultaneity of signals from the infrared sensors or by summing the signals from the infrared sensors. | 01-28-2010 |
20100026490 | Foliage penetrating sensor array for intrusion detection - An intrusion detection system that is capable of foliage penetration is disclosed employing an array of field disturbance transceivers operating at UHF frequencies. The array of transceivers generate a multiplicity of RF fields between nearby units and detect the presence of intruders by detecting disturbances in these fields. The emitted UHF signals used to generate the RF fields are also used to provide a communication link between transceivers in the array and to a control station. The control station facilitates the operation of the array from a remote monitoring site. A method of array deployment provides multiple opportunities to detect an intruder and secondarily provides redundant communication links in case of a sensor failure. Automatic means of setting detection thresholds based on environmental conditions assures a high probability of detection along with a low false alarm rate. | 02-04-2010 |
20100102963 | DEVICE FOR DETECTING THE PASSAGE OF OBJECTS WITH A RFID LABEL, METHOD AND SYSTEM USING SUCH DEVICE - A device for the detection of the passage of objects, people or animals bearing a radio frequency identification (RFID) tag, including at least one mobile support which, when at rest, forms a barrier to the passage of the objects, people or animals and which, when in contact with the latter, is capable of moving towards a withdrawn position, this mobile support bearing an antenna connected electrically to an RFID tag reader. | 04-29-2010 |
20100148961 | ACTIVE VIRTUAL FENCE USING MESH NETWORKED RF TAGS - A system capable of monitoring an area and detecting a disturbance with the area. The system has a plurality of ultra-wide band radio frequency tags, each of the tags including a digital signal processing module configured to monitor changes in radio frequency multipath properties of received packets transmitted by at least one other of the tags. Changes in the radio frequency multipath properties may be caused by a disturbance indicative of an object in the vicinity of the tags. A corresponding method is also disclosed. | 06-17-2010 |
20100164721 | Intrusion Detector - An intrusion detector comprising a passive sensor for detecting a person entering a space to be monitored, said intrusion detector comprising a housing provided with a window for said passive sensor, optical means for directing electromagnetic radiation from said person onto the passive sensor, alarm means connected to said passive sensor for generating an alarm in case the electromagnetic radiation from said person being detected by the passive sensor corresponds to a signal value that exceeds a maximum level or falls below a minimum level, a special feature being the fact that the optical means are provided with a mirror curved in two directions for forming at least one protective curtain extending in a vertical plane in the space to be monitored, wherein the passive sensor is disposed on the optical axis at the focus of the mirror, and wherein the mirror directs a beam of electromagnetic radiation from the person, rotated through at least 45°, preferably through at least substantially 90°, onto the passive sensor. | 07-01-2010 |
20100238029 | INTRUSION-OBJECT DETECTION SYSTEM, METHOD OF DETECTING INTRUSION-OBJECT AND METHOD OF DETECTING MALFUNCTION - A method determining a malfunction when a reception signal fluctuates at a receiver owing to malfunctions occurring on a leaky cable and its related devices. The method determines, among range bins correlating the reception signal with a distance from a feed end of a radio-wave radiation unit and a radio-wave reception unit, based on a correlation between a time-delay from a transmission time of a transmission signal until a reception time of the reception signal and a transmission path distance of the reception signal in the radio-wave radiation unit and the radio-wave reception unit, when, comparing the reception signal with the transmission signal with respect to the range bin corresponding to a far end, a level of amplitude reduction in the reception signal exceeds a predetermined ratio, that a malfunction is present in either the radio-wave radiation unit or radio-wave reception unit. | 09-23-2010 |
20100238030 | MOTION DETECTOR HAVING ASYMMETRIC ZONES FOR DETERMINING DIRECTION OF MOVEMENT AND METHOD THEREFORE - A detector, system including a detector and method for sensing motion within a detection region. The detector has a detection element and a focusing element aiming received energy corresponding to a presence within the detection region toward the detection element. The focusing element has a plurality of sections in which each of the plurality of sections establishes a corresponding detection zone within the detection region. The plurality of sections are arranged to allow a motion vector to be determined for an object passing through the detection region. The system includes a detector that generates pulses each time presence in a detector zone is detected as well as a central alarm panel. The central alarm panel receives the pulses and has processor that evaluates the timing between electrical pulses to determine the motion vector. | 09-23-2010 |
20110063110 | INTRUSION DETECTION AND TRACKING SYSTEM - An intrusion detection and tracking system includes a plurality of nodes, a DP and a gateway. The nodes are disposed about an area and form a wireless network to be monitored, the nodes are configured to receive data and transmit data frames with a signal strength indicator and/or a link quality indicator in the frames. The DP is communicatively connected to the network and configured to analyze variations in the signal strength indicator and/or link quality indicator to detect and track disturbances to an electromagnetic field in the area. The gateway is configured to form a data link between the network and the DP. | 03-17-2011 |
20110063111 | Intrusion Detection and Tracking System and Related Techniques - An intrusion detection and tracking system includes a plurality of nodes, a DP and a gateway. The nodes are disposed about an area and form a wireless network to be monitored, the nodes are configured to receive data and transmit data frames with a signal strength indicator and/or a link quality indicator in the frames. The DP is communicatively connected to the network and configured to analyze variations in the signal strength indicator and/or link quality indicator to detect and track disturbances to an electromagnetic field in the area. The gateway is configured to form a data link between the network and the DP. | 03-17-2011 |
20110234404 | INTRUSION DETECTION SYSTEM AND SENSOR DEVICE THEREOF - A intrusion detection system includes a first sensor device having a first transmission circuit unit that transmits a modulation wave of a first transmission spectrum diffusion signal to a first transmission leakage transfer passage and a second sensor device having a second transmission circuit unit that transmits a modulation wave of a second transmission spectrum diffusion signal to a second transmission leakage transfer passage. The signal interval of the first transmission spectrum diffusion signal is the same as the signal interval of the second transmission spectrum diffusion signal. The first transmission spectrum diffusion signal and the second transmission spectrum diffusion signal are shifted in frequency so that the first transmission spectrum diffusion signal does not overlap with the second transmission spectrum diffusion signal. | 09-29-2011 |
20110273291 | Drowning prevention system - A method for providing a security barrier proximate a body of water such as a lake or a swimming pool. One or more beams—preferably infra red light beams—define the barrier. A detector is positioned to monitor each beam so that a moving object “cutting” the beam can be detected by a controller in communication with the beam or beams. A motion detector monitors for motion in a broad area around the location of the security perimeter. The motion detector is also in communication with the controller. The controller deactivates the beams and relies solely on the motion detector when no objects are near the perimeter. Once the motion detector senses an object in the area of the perimeter, however, the controller activates the beams. If an object then interrupts a beam, the controller activates an alarm. | 11-10-2011 |
20110304457 | ORGANICALLY REACTIVE CELL FOR UNDERGROUND SENSING (ORCUS) AND SYSTEM - A movement detection system includes a microwave antenna able to transmit microwave frequency signals into a space. An electronics controller is connected to the microwave antenna, and is configured to continually measure the impedance of the microwave antenna while it transmits microwave frequency signals into the space. An interpretive device is connected to receive impedance measurements from the electronics controller, and is configured to interpret and report changes in the magnitude and phase angles of individual impedance measurements as the passing of things and their direction through the space. | 12-15-2011 |
20140028457 | Real Time Threat Detection System - A real-time threat detection system incorporating a plurality of sensors adapted to detect radiation across the majority of the electromagnetic spectrum. The system also includes an aided or automatic target recognition module which compares the data from the sensors against known radiation signatures and issues an alert when an anomalous signature is detected. The system further includes an operator station which displays sensor information allowing the operator to intervene. The sensors detect radiation which is normally emitted by persons or other bodies and display areas to the operator where normal emissions are blocked. | 01-30-2014 |
20140375454 | EVALUATION OF THE SECURITY SITUATION IN A BUILDING BY MEANS OF A RADIO TOMOGRAPHIC LOCATION AND DETECTION METHOD AND BY MEANS OF RFID READING DEVICES - A method and a system evaluate a security situation in a building. The building has accommodation areas with access authorization for authorized persons. A count of the persons present in the accommodation areas is determined in that, in a radio network which contains a plurality of radio stations arranged spatially distributed in the ceiling, wall or floor, the influencing of the radio field of the radio stations between one another by persons physically present there is evaluated, by a radio tomographic location and detection method. A current count of identifiers which are read by RFID reading devices of RFID transponders is determined, the identifiers being carried by authorized persons. The RFID reading devices are arranged there spatially distributed in the ceiling, wall or floor. Based on the respective counts of personal identifiers and the determined person count, an indicator for evaluating the current security situation in the building is determined. | 12-25-2014 |
20150091728 | Alarm system for passageways - An improved alarm system for monitoring movement through a passageway defined by opposing sidewalls comprises a lower passage indicator disposed toward the lower ends of the sidewalls, an upper passage indicator disposed toward the upper ends of the sidewalls and a control mechanism configured to sound an alarm if one of the passage indicators indicates passage through the passageway and the other passage indicator does not. In a preferred embodiment, the alarm system is configured as a pool alarm and each passage indicator comprises an emitter/receiver that emits an infrared beam toward an opposing reflector to provide a lower beam and an upper beam. If only the lower beam is interrupted, indicating a child passing through the passageway, the control mechanism will generate an alarm signal. If both beams are interrupted, indicating an adult passing through the passageway, the control mechanism will not generate the alarm signal. | 04-02-2015 |
20150302712 | MONITORING INTRUSION IN AN AREA USING WIFI-ENABLED DEVICES - For monitoring an area, signal strength samples are obtained (S | 10-22-2015 |
20150379843 | SIGNAL COMPARISON CONTROL UNIT, ANTI-THEFT ALARM UNIT COMPOSED THEREBY, AND INVISIBLE ELECTRONIC FENCE - A signal comparison and control unit including: a pre-processing module, pre-processing input signals to conform to processing requirements of a comparison module; the comparison module, comparing pre-set base signal parameters with output signal parameters from the pre-processing module and outputting a comparison result to a decision module; the decision module, with triggering conditions being preset, triggering output of electric signals or comparison data when the comparison result output by the signal comparison module matches the triggering conditions. Also an intrusion alarming unit and an invisible electronic fence constructed from the signal comparison and control unit. The signal comparison and control unit are capable of reducing false alarms. | 12-31-2015 |
20160093177 | Glass Breakage Detection System and Method - A method for detecting a glass breakage event, the method including, responsive to receiving a plurality of acoustic event indications associated with an acoustic event, ascertaining whether the plurality of acoustic event indications together indicate a random nature of at least part of the acoustic event, thereby ascertaining that the acoustic event corresponds to a glass breakage event. | 03-31-2016 |
20160133105 | SYSTEM AND METHOD FOR REMOTE MONITORING BASED ON LED LIGHTING DEVICE - A system for remote monitoring based on an LED lighting device is provided. The system includes a smart terminal configured to check regularly data and status of the LED lighting device stored in a cloud server and a wireless router configured to provide a wireless network. The LED lighting device includes a Wi-Fi module and a microwave sensor module, where the Wi-Fi module is configured to connect the LED lighting device to the wireless network, perform real-time data acquisition on the microwave sensor module, and upload the acquired data to the cloud server in real time; and the microwave sensor module is configured to detect object movement within an effective range. Further, the system includes the cloud server configured to receive information about an abnormal object moving within the effective range sent from the Wi-Fi module, and send the received information to the smart terminal. | 05-12-2016 |
20190147713 | Motion Localization Based on Channel Response Characteristics | 05-16-2019 |
340554000 | Doppler effect | 8 |
20090051529 | Intrusion Detection Sensor - One embodiment is provided with a microwave sensor ( | 02-26-2009 |
20090079564 | MICROWAVE DIRECTION OF TRAVEL DETECTOR BY PARALLEL SAMPLING - A microwave direction of travel detector and method of detecting the direction of an intruder in a protected region. The microwave direction of travel detector transmits and receives, by a microwave transceiver a microwave signal directed toward a protected area. The microwave return signal is modulated by a moving target to produce a Doppler signal. The received Doppler signal is amplified by a chain of amplifiers having two or more amplifiers coupled to the microwave transceiver. A controller monitors the output of each chain of the amplifiers. The microwave sensor is configured for parallel sampling an amplified Doppler signal output from each amplifiers having a low signal output and each successive chain of the amplifiers a successively higher signal output. The controller determines if there is a direction of travel motion from the intruder and sends an alarm. | 03-26-2009 |
20090121870 | METHOD FOR CALIBRATING A MICROWAVE MOTION DETECTOR AND A MICROWAVE MOTION DETECTOR - A method of automatically calibrating a motion detector and a motion detector adapted for calibration using the method. The method comprises setting the motion detector to a calibration mode, waiting a preset period of time for the installer to walk to the furthest distance, receiving a Doppler signal generated by motion at the furthest distance from the microwave motion detector within the protected area, measuring an amplitude of the Doppler signal and storing a motion detection threshold for the microwave motion detector. The motion detection threshold is a proportional to the measured amplitude. | 05-14-2009 |
20100013636 | MICROWAVE RANGING SENSOR - A method for detecting an intruder in a protected space that uses a microwave frequency sensor to determine an accurate distance measurement to the intruder. The accurate distance measurement reduces the false alarms typically associated with microwave frequency sensors due to motion outside the protected space and vibration within the protected space. The motion detector transmits three microwave frequency signals of different frequencies in order to eliminate an ambiguity problem when determining the accurate distance measurement. The accuracy of the intruder distance measurement may be determined with greater resolution by reiteratively transmitting and evaluating microwave frequency signals of different frequencies. The motion detector of the present invention may include a PIR sensor. The accurate distance measurement allows the motion detector to precisely set signal threshold levels for the microwave frequency detector and the passive infrared detector to reliably detect an intruder while discriminating against an animal or other moving object. | 01-21-2010 |
20100073165 | MICROWAVE MOTION DETECTOR WITH TARGET ANGLE DETECTION - The present invention is an alarm system that includes a dual technology motion sensor. The dual technology sensor includes a PIR sensor with a PIR detection pattern and a Doppler microwave frequency motion detector with a detection pattern wider than that of the PIR sensor. The microwave detector's processing circuitry distinguishes motion beyond the PIR detection pattern, and limits the microwave detector's field of view to match the PIR detector's detection pattern. The microwave detector has a transmitting antenna, two receiving antennas, and processing circuitry for processing received signals. The microwave detector's processing circuitry uses phase information from the two receiving antennas to distinguish motion beyond the PIR detection pattern. | 03-25-2010 |
20100201518 | MICROWAVE CURTAIN SENSOR - A method and apparatus are provided for detecting an intruder. The method includes the steps of receiving an echo from opposing sides of a curtain line extending through the secure area, determining a difference between the received echoes, determining a phase difference of the signal and generating an alarm when the determined phase changes sign between successively received echoes. | 08-12-2010 |
20100328068 | Hand-Held Pocket-Sized Barrier Penetrating Motion Detector - A motion detector utilizing a low microwave frequency that penetrates dry, non-metallic barriers and detects motion by sensing a Doppler shift in the received signal that has been reflected off of aqueous or metallic objects is disclosed. It is a battery powered hand-held pocket-sized device that includes a microwave motion sensing module that preferably operates continuously at a single frequency, with a single antenna for both transmitting and receiving microwave signals. Circuitry converts the Doppler shift in the received signal into a voltage that is then modified so that it can be immediately displayed to the user on an indicator meter. It is also contemplated that the device include a data logging module for storing the modified signal, another type of data, or both. The device can also include a means for charging the batteries and an on-off switch to conserve power while the device is not in use. | 12-30-2010 |
20120126980 | SELF-TEST METHOD FOR A MICROWAVE MODULE - A method and apparatus are provided for automatically testing microwave instruction detection modules of a security system. The method includes the steps of detecting intruders within a protected space by monitoring a Doppler output of a signal extraction circuit coupled to a microwave transceiver module, varying a frequency of direct current power pulses applied to the microwave transceiver module, detecting a difference in magnitude of the Doppler output of the signal extraction circuit over the varied frequency and comparing the detected difference with a fault threshold level. | 05-24-2012 |
340555000 | Light | 31 |
20080252452 | Intruder detection system - An intruder detection system includes: an intruder detection device; and a leaky transmission line pair including a transmission-side leaky transmission line, which is connected to the intruder detection device and through which an electric wave is output on the basis of an output from the intruder detection device, and a receiving-side leaky transmission line, which is connected to the intruder detection device and through which the electric wave output from the transmission-side leaky transmission line is received. Intrusion detection is performed by causing the intruder detection device to detect a variation of the electric wave received through the receiving-side leaky transmission line. A plurality of leaky transmission line pairs, which are connected to the intruder detection device and through which the electric wave is output and received, are provided to be spaced apart from each other. | 10-16-2008 |
20080266087 | Optical Security Sensors, Systems, and Methods - A security system includes an optical fiber, a plurality of sensors, and a light source, detector, and a controller. The optical fiber and sensors are attached and positioned along a fence. The optical fiber passes through the sensors. The sensors include a hinged striker having a weight that swings under the influence of gravity and is movable in response to vibration of the fence to compress and bend the optical fiber and attenuate transmission of an optical signal through the optical fiber. In another embodiment, an optical fiber cable having a plurality of optical fibers may be employed to define zones and allow determination of intrusion of a particular portion of the fence. In a further embodiment, a ground sensor is disclosed. | 10-30-2008 |
20080316026 | Method and apparatus for detecting presence and range of a target object using a common detector - A multifunction detector for detecting energy reflected from the surface, the detector comprising: a focal plane array in communication with the optical receiving path; and an optical receiving path; a read-only integrated circuit in communication with the optical receiving path, integrated with a focal plane array; and a processor programmed to operate the focal plane array and read-out integrated circuit in a first mode to process signals in a first frequency band, and in a second mode to process signals in a second, wider frequency band. | 12-25-2008 |
20090289791 | Monitor Area Setting Device For Optical Scanning Unit - This invention provides a monitor area setting device with which an area can be easily added to or deleted from a monitor area. The device includes: an area addition/deletion specifying unit that specifies an addition area and a deletion area based on an input signal from an operating unit; an inconsistent area extraction unit that extracts an area that is between the safety area and the addition area with respect to the safety sensor as an inconsistent area; and an area setting update unit that updates area setting information so as to set an area formed either by adding the addition area and the inconsistent area to the safety area or by excluding the deletion area and the inconsistent area from the safety area as a new monitor area. | 11-26-2009 |
20090295580 | Area Monitoring Sensor - This invention provides an area monitoring sensor capable of setting a monitor area without connecting a terminal device for area setting. The area monitoring sensor that emits detection light in different emitting directions and senses an intruder within a monitor area based on reflection of the detection light, the monitor area being previously set as a polygonal shaped area defined by three or more sides, the sensor being provided on a first side out of the sides of the monitor area, and includes a side selecting unit that selects a second side other than the first side out of the three or more sides that define the monitor area based on an operation input; a distance specifying unit that specifies a distance between the area monitoring sensor and the second side that is being selected by the side selecting unit based on an operation input. | 12-03-2009 |
20100039261 | ENTRANCE SECURITY SYSTEM - An entrance denial security system comprises an entrance barrier closing an entrance into a secured area having a plurality of structural tubular elements with hollow cores forming a rigid integral barrier. At least one optical fiber sensor line is laced through the hollow cores of the structural elements for detecting a fault condition signifying an unauthorized intrusion attempt. A processor in communication with the fiber sensor line generates a fault signal in response to the occurrence of a fault condition and identifying the entrance where the fault condition occurred. A communication device operatively associated with the processor communicates the fault signal and an alarm so that a proper security response can be made to the fault condition. The system further comprises a plurality of intrusion sensors disposed at certain locations. Preferably primary and secondary optical fiber sensor lines are routed through the structural elements and intrusion sensors, and primary and secondary scanning units pulse signals along the sensor lines and receive reflected signals back from the sensor lines. In the event of a cut through in the sensor lines, the primary sensor line monitors the barrier and sensors downstream of the break, and the secondary sensor line is activated to monitor the barriers and sensors downstream of the break. | 02-18-2010 |
20100097216 | INTRUDER DETECTION SYSTEM - An intruder detection system comprises an illumination means for illuminating a field of view with a modulated optical signal, modulated by a modulation signal; an optical receiver for receiving a delayed reflected signal; a cross correlator for calculating a cross correlation function between the modulation signal and the received delayed reflected signal; and means for detecting changes in the cross correlation function, a change being used to provide intruder detection. This system uses optical sensing and cross correlation calculation to enable an intruder detection signal to be obtained. This can enable a solid state, low cost, and reliable sensor to be provided for detecting intruders. | 04-22-2010 |
20100117830 | FAULT-TOLERANT DISTRIBUTED FIBER OPTIC INTRUSION DETECTION - An intrusion detection system for monitoring a premises includes at least one optical cable that houses at least one optical fiber and extends about the premises. Optical time domain reflectometry (OTDR) means is operably coupled to opposite first and second ends of the at least one optical fiber. The OTDR means includes first signal processing circuitry that analyzes the backscatter signal received via the first end of the at least one optical fiber in order to detect an intrusion of the premises, and second signal processing circuitry that analyzes the backscatter signal received via the second end of the at least one optical fiber in order to detect an intrusion of the premises. The redundancy of intrusions decisions made by the first and second signal processing circuitry can be verified. The system preferably further includes means for detecting a break in the at least one fiber, for identifying location of the break, for outputting to a user the location of the break, and for raising an alarm indicating the break. | 05-13-2010 |
20100141444 | METHOD TO IMPROVE WHITE LIGHT IMMUNITY OF INFRARED MOTION DETECTORS - The present invention provides a system and method for improved white light immunity for 1R motion sensors. The system comprises a first sensor responsive to light in a first range of wavelengths in the secure area, the first sensor generating a first output signal indicative of a first detected parameter of the light in the first range of wavelengths, a second sensor proximate to the first sensor, the second sensor being responsive to light in a second range of wavelengths in the secure area, and a logic unit for compensating the first output signal based in part upon a reference signal indicative of a second parameter of the light in the second range of wavelengths. The first sensor is a pyroelectric sensor and the second sensor is a visible light sensor. The second parameter comprises an intensity value of the light in the second range of wavelengths, wherein the reference signal is indicative of a differentiation of said intensity value with respect to time. The system further comprises an alarm generation unit to generate an alarm if the first signal exceeds a first threshold value, the first threshold value being a function of a baseline of the first signal. The method comprises generating at a first sensor a first output signal indicative of a first detected parameter of light in a first range of wavelengths, and compensating the first output signal based in part upon a reference signal indicative of a second parameter of light in a second range of wavelengths. | 06-10-2010 |
20110273292 | SECURITY SENSOR SYSTEM - Since a sensor signal intermitted on the basis of a sensor signal including an abnormality detection signal, detected as a result of a persistence of an abnormal condition of a security sensor, is generated and an intermitted output signal in dependence on an intermitted sensor signal input is transmitted from a wireless transmitter | 11-10-2011 |
20130169438 | DEVICE HAVING ALARM SYSTEM BASED ON INFRARED DETECTION AND METHOD FOR INSTALLING ALARM SYSTEM TO A DEVICE - A device having an alarm system based on infrared detection includes an exterior casing, an interior casing located in the exterior casing, and an alarm system received in a space cooperatively formed by the exterior and interior casings. The alarm system is configured to detect transgression into the space, and includes a number of pairs of infrared sensors, an alarm nodule, and a control module. Each pair of infrared sensors includes an infrared radiation transmitter configured to emit infrared rays, whereby the space is fillable with infrared rays emitted by all the infrared radiation transmitters; and an infrared radiation receiver configured to receive the infrared rays from the infrared radiation transmitter. The control module is configured to detect any signal generated by an infrared radiation receiver, and actuate the alarm module to generate an alarm signal when at least one infrared radiation receiver has ceased to receive infrared rays. | 07-04-2013 |
20140354430 | ENERGY HARVESTING, AMBIENT LIGHT FLUCTUATION SENSING INTRUSION DETECTOR - Embodiments are directed to detecting that an intrusion is occurring by detecting, by a first sensor, that the intrusion is occurring based on a variation of light exceeding a threshold, detecting, by a second sensor, that the intrusion is occurring, and generating an intrusion status signal that indicates the intrusion is occurring based on determining that the first and second sensors detect that the intrusion is occurring. | 12-04-2014 |
20160140817 | ACTIVE INFRARED SENSOR - Methods and systems are described for monitoring a monitored space. An example computer-implemented method for monitoring a monitored space includes periodically emitting with an active infrared sensor a modulated infrared signal into a monitored space being monitored by a home automation system, receiving with the active infrared sensor the modulated infrared signals reflected from objects in the monitored space, and determining at least one of whether a number of objects in the monitored space have changed and whether any of the objects are moving. | 05-19-2016 |
20160155306 | Area Monitoring Sensor | 06-02-2016 |
340556000 | Beam | 17 |
20080204229 | Safety Sensing System for a Powered Door System - A safety sensing system includes an apparatus for use in a doorway having a powered door slidable for closure of the doorway. The apparatus includes radiation transmitters and/or receivers for providing a curtain of detection beams across the doorway, and is formed as a composite structure that includes: a fixative member connectable by securing means to a side of the doorway at a door frame, the fixative member including a first portion of a mating connection means; and, a housing containing a plurality of the transmitters and/or receivers along its length, and including a second portion of the mating connection means for attaching the sealed housing to the fixative member The mating connection means allows the housing to be removed and replaced while the fixative member remains in situ. | 08-28-2008 |
20090015405 | TAMPER DETECTOR FOR A SECURITY SENSOR - A security arrangement includes a mounting device having an upstanding wall. The mounting device is mounted to a surface of a structure such that the wall is oriented substantially perpendicular to the surface. A security sensor senses an event that occurs outside of the security arrangement. A tamper detector is attached to the security sensor and includes an optical emitter, an optical receiver, and a slot disposed between the emitter and the receiver. The emitter transmits optical energy that is received by the receiver through the slot. The wall of the mounting device is received in the slot when the tamper detector is coupled to the mounting device to thereby block the transmission of the optical energy from the emitter to the receiver. A controller is communicatively coupled to the receiver and produces a tamper signal in response to the receiver receiving the optical energy. | 01-15-2009 |
20090058642 | Penetration Detecting Apparatus - The present invention provides a penetration detecting apparatus which is applicable for various kinds of applications. Although an interval between processing machines and the conveying of an object W is suspended to wait for processing, a muting function of the penetration detecting apparatus is effective. Another feature of the present invention is to provide a penetration detecting apparatus which can avoid the muting function continuously being activated when a trigger sensor for initiating the muting function is malfunctioning. According to the present invention, there is provided a penetration detecting apparatus having a muting function that has a muting terminator for terminating the activated muting function based on the comparison performed by the muting timer and a signal representing a passage of the object provided from a passage sensor when the differential time is within the predetermined criterion, and for terminating the activated muting function based on a signal representing a passage of the object provided from a passage sensor when the differential time is not within the predetermined criterion. | 03-05-2009 |
20100194564 | SECURITY SYSTEM INCLUDING PHOTOBEAM CARRYING STATUS INFORMATION - A security method includes transmitting an optical beam from a battery-powered transmitter. The beam carries a tamper signal and/or a battery status signal. The beam is received at a receiver. A radio frequency signal is transmitted from the receiver to a controller. The radio frequency signal includes an alarm signal if there is an interruption of reception of the beam at the receiver. The radio frequency signal is dependent upon the tamper signal and/or battery status signal. | 08-05-2010 |
20100194565 | SOLAR POWERED SECURITY SYSTEM - A solar powered perimeter beam security system comprising a plurality of spaced towers. The towers have detection beams extending between them for detecting an intruder when at least one of the detection beams is interrupted. Each of the towers communicates with a remote unit. | 08-05-2010 |
20100283610 | Rearming electronic animal trap with infrared sensor and multiple-killing-plate configuration - An electric or electronic animal trap with a CPU-controlled, rearming, multiple killing plate configuration and automatically resetting interruptible beam sensor for triggering a high voltage cycle. A high-voltage output circuit is connected to killing plates which are activated with a high-voltage pulse train when a pest interrupts the beam signal, such as an infrared beam signal generated by an infrared transmitter to an infrared receiver. The trap is preferably configured to automatically rearm if the IR beam signal is no longer interrupted after the killing cycle. If the IR beam signal is still blocked after the killing cycle, however, the trap enters a standby mode indicating trap servicing is required to remove the dead rodent from the trap. | 11-11-2010 |
20130278423 | DETECTING DEVICE AND OPERATING METHOD THEREOF - A detecting device includes at least one transmitter and plural receivers. After the at least one transmitter emits plural incident light beams to a detection zone, plural reflected light beams reflected from the detection zone are received by the plural receivers. If no object is moved within the detection zone, the plural reflected light beams strike a first part of the plural receivers, so that the plural receivers are in an initial reception configuration. If an object is moved within the detection zone, the plural reflected light beams are disturbed by the object and deflected to a second part of the plural receivers, so that the plural receivers are in a disturbed reception configuration. According to the reception configuration change, a moving direction of the object within the detection zone is determined. Consequently, the detecting range is largely enhanced, and the cost is reduced. | 10-24-2013 |
20140002264 | MULTI-AXIS PHOTOELECTRIC SENSOR | 01-02-2014 |
20140285342 | SOLAR BATTERY-DRIVEN OBJECT DETECTION SYSTEM - A reception unit | 09-25-2014 |
20160012694 | A Barrier Assembly | 01-14-2016 |
20160086459 | Fibre Optic Based Intrusion Sensing System - A fiber optic based intrusion sensing system includes two or more fiber optic cables buried in a shallow trench in the ground, side by side in a predetermined nonzero distance to each other and at one or more predetermined depths. A dynamic distributed fiber optic interrogator measures a predetermined property related to a change in the length of the cables connected to it. A control unit is connected to all interrogators and analyzes the measurements of the predetermined property and identifies objects on the surface by combining the simultaneous measurements of all cables and correlating the measurements to the type of object on the ground surface, the location of the object on the perimeter, the weight, speed and direction of the object, particularly the direction in or out of the secured perimeter. | 03-24-2016 |
340557000 | Laser | 6 |
20090091446 | SECURITY SYSTEM USING LASER RANGE FINDER AND METHOD OF DETECTING INTRUDER USING LASER RANGE FINDER - A security system using a laser range finder that can precisely determine an existence and a location of an intruder, and a method of detecting the intruder using the laser range finder are provided. The security system using a laser range finder, the security system includes: the laser range finder emitting laser beam, receiving the reflected laser beam, measuring a distance between the laser range finder and a target object, and detecting an existence and a location of an intruder; and at least one reflective means reflecting the emitted laser beam toward the laser beam finder, wherein at least one reflective means is spaced by a predetermined distance of the laser range finder and is installed a predetermined distance from the laser range finder. | 04-09-2009 |
20090091447 | Laser area sensor - In an embodiment, a laser area sensor of the present invention comprises: a laser range finder; a scanning mechanism that changes a measurement direction of the laser range finder; a distance data acquiring portion that defines a detection area and acquires distance information in each direction in the detection area in a time-series manner, by periodically causing the laser range finder to perform measurement while causing the measurement direction to be changed; a human body judging portion that extracts a portion that is presumed to correspond to a human body, from among the distance information and judges whether or not the extracted portion matches a human body based on a time-series moving status of the extracted portion; an alert output control portion; a memory; and a DIP switch. | 04-09-2009 |
20090278684 | SCANNING SECURITY DETECTOR - A method of identifying a potential security threat in a space. A first scan of the space is performed during a first time interval by illuminating at least a portion of the space with energy from an energy source at an illumination angle, such that the energy is reflected from a surface in the space. An incident angle of the reflected energy is detected with a detector located at a known distance from the energy source and a distance from the surface to the energy source is calculated based on the incident angle. The steps are repeated for a plurality of different locations in the space. A first map of the space is generated from the first scan, and a second map is generated from a second scan of the area. The maps are compared to determine a change in the space and to determine if a potential security threat is present. | 11-12-2009 |
20110273293 | LIGHT-CURTAIN ALARM WITH PROXIMITY-DETECTED ACCESS AUTHORIZATION - A light-curtain alarm system is disclosed that provides to authorized persons uninhibited access to a protected item by automatically, temporarily deactivating the alarm whenever proximity of an authorized person is detected. Each authorized person carries a deactivating device that is detected at short range, preferably using radio waves or Bluetooth. Embodiments can track detection information, and/or distinguish between a plurality of deactivating devices, so as to track and/or control access to the protected item. The deactivating device can be included in an identification badge, and/or can be carried in a pocket or worn around a wrist or neck. The light-curtain can be generated using any combination of lasers and/or other light sources, light reflectors, and photo-detectors. In preferred embodiments, the alarm system can be configured to control access to a magnet of a magnetic resonance device, such as an MRI or NMR. | 11-10-2011 |
20120274466 | THEFT PROTECTION DEVICE AND METHOD FOR THE DETECTION OF UNAUTHORIZED INTRUSION OR ENTRANCE - A theft protection device ( | 11-01-2012 |
20160007587 | Configurable Portable Laser Alarm System | 01-14-2016 |