| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 367093000 | Presence or movement only detection | 51 |
| 20080205194 | Sonar Scanner - Detecting an object using sound waves includes outputting a sound wave from a transducer, receiving an echo after outputting the sound wave, obtaining a threshold value based on the echo and plural other echoes that are within a predetermined range of the echo, and determining if the echo is a result of the sound wave based on the threshold value. | 08-28-2008 |
| 20080239873 | DETECTION DEVICE, DETECTION PROGRAM AND DETECTION METHOD - An object is detected without being constrained by the positional relationship between the object and the detecting position. A detection device includes a pseudo sound source and a monitoring unit. The pseudo sound source generates a scanning sound wave of a phase-conjugate wave in the time domain based on an acoustic signal by performing active phase conjugation, and causes the scanning sound wave to converge on the detection object from the above thereof within the propagation space by utilizing a feature that the scanning sound wave converges on the pseudo sound source which is the generation source of the acoustic signal. The monitoring unit extracts a reflected sound wave which is reflected at the detection object from the sound wave in the propagation space by performing passive phase conjugation. The detection object is detected based on presence or absence of the extracted reflected wave. | 10-02-2008 |
| 20090046538 | Apparatus and method for Determining Presence of Objects in a Vehicle - Vehicle including a first substructure and a second substructure arranged such that an interior space is defined by or between the first and second substructures, and an arrangement for determining whether an object is present in the interior space. The arrangement includes ultrasonic transducers arranged on the second substructure and to transmit ultrasonic waves toward the first substructure and receive any waves reflected by objects in the interior space and a processor coupled to the ultrasonic transducers and arranged to determine whether an object is present in the interior space based on reception of waves by the ultrasonic transducers. If the vehicle is an automobile and the interior space is the passenger compartment therein, the first substructure can be the passenger seat and the second substructure can be the A-pillar, in which case, the processor determines the presence or absence of a passenger in the passenger seat. | 02-19-2009 |
| 20090122648 | ACOUSTIC MOBILITY AID FOR THE VISUALLY IMPAIRED - A wide-band sonar system can be used as a mobility aid by the visually impaired. The system includes an acoustic source and a pair of miniature microphone arrays with frequency-dependent beam patterns designed to mimic the properties of the human ear. Each microphone is preferably mounted near a respective ear of the user. In one embodiment the source has a bandwidth of 30-50 kHz and uses a waveform that preferably optimizes the time-bandwidth product. A heterodyning technique is used to shift the received signal down to the audible range (20 Hz-20 kHz), after which it is presented to the user through open-style earphones. The acoustic source and microphone arrays are mounted on the user's head so that the system will always be aligned therewith—as an example, they may be mounted near the user's ears on conventional eyeglass frames or a similar mounting device. | 05-14-2009 |
| 20090303835 | UNDERWATER DETECTION DEVICE - An underwater detection device includes a transceiver module for transmitting underwater an ultrasonic pulse signal that is frequency-modulated and receiving an echo signal corresponding to the transmitted signal, a pulse compression module for pulse-compressing the signal received by the transceiver module and outputting a signal pulse-compressed, a suppression range determining module for determining a suppression range where a range side lobe suppression process is performed for the pulse-compressed signal, an echo determining module for determining whether the data of the pulse-compressed signal at each depth corresponding to a range side lobe, a suppression value determining module for determining a suppression value for the data of the pulse-compressed signal at each depth, a suppression conducting module for performing a calculation to suppress the range side lobe based on the suppression value for the data determined to be data of the pulse-compressed signal corresponding to the range side lobe by the echo determining module among a plurality of data of the pulse-compressed signals that fall into the suppression range, and a display processing module for generating a signal for display based on the signal outputted from the suppression conducting module to display a generated signal as detected information. | 12-10-2009 |
| 20100074056 | OBSTACLE DETECTION DEVICE FOR DETECTING OBSTACLE - An obstacle detection device for detecting an obstacle includes: a transmitting and receiving element for transmitting and receiving an ultrasonic wave; an amplifier for amplifying a received signal corresponding to a received ultrasonic wave; and a gain controller for controlling a gain of the amplifier The gain controller increases the gain with time elapsed from a transmission time when the transmitting and receiving element transmits the ultrasonic wave. The gain controller starts to increase the gain at a rising time when reverberation caused by the transmitted ultrasonic wave is disappeared. | 03-25-2010 |
| 20100208553 | Hidden ultrasonic transducer with beam angle control for non-contact target detection systems - An ultrasonic transducer utilizes a unique forward acoustic transmission line comprised of a composite structure partially consisting of a portion of a continuous smooth sheet of material, such as an automobile bumper, from which the acoustic beam is emitted. This makes it invisible to sight, thus allowing for an improved object detection system in which the sensors cannot be seen, so that they do not interfere with the smooth lines that were designed into the surface of the object or vehicle onto which they are mounted. This is a significant improvement for applications where the look and style of the surface of the platform is important, such as in automotive park assist systems. | 08-19-2010 |
| 20100220550 | Obstacle detection apparatus and method for detecting obstacle - A transmission and reception device is located at a predetermined height on a movable object and directed toward an outside. The transmission and reception device includes a transmission unit for repeatedly transmitting sensing waves at a predetermined interval and a reception unit for receiving reflective waves of the sensing waves from a detected object. A peak value detecting unit detects peak values of the received reflective waves and stores the detected peak values. A difference arithmetic unit calculates a difference in the detected peak values with movement of the movable object closer to the detected object. An object determination unit determines the detected object to be a near-road-surface obstacle, which is close to a road surface, when the difference is a negative value. The object determination unit determines the detected object to be an other obstacle than the near-road-surface obstacle when the difference is a positive value. | 09-02-2010 |
| 20100246326 | ULTRASONIC EXPLORATION METHOD AND ULTRASONIC EXPLORATION APPARATUS - To propose an ultrasonic exploration method and an ultrasonic exploration apparatus that allow exploration of an exploration-target area such as a welded portion to provide a cross-sectional image of the exploration-target area accurately and stably. | 09-30-2010 |
| 20110261651 | ULTRASONIC SENSOR - An ultrasonic sensor includes a transmitting device, receiving devices arranged in an array, and a circuit device. One receiving device is configured as a reference receiving device. The circuit device includes a reference signal generator and first and second synchronous detectors. The reference signal generator generates a reference signal by using a received signal of the reference receiving device. The first synchronous detector performs synchronous detection of a received signal of one of the receiving devices based on the reference signal to detect a distance to an object. The second synchronous detector performs synchronous detection of received signals of the receiving devices except the reference receiving device based on the reference signal to detect a direction of the object. | 10-27-2011 |
| 20110273963 | DETECTION DEVICE - This disclosure provides a detection device, which includes a transceiving module for transmitting a transmission signal and receiving an echo caused by the transmission signal to output a reception signal according to an intensity of the echo, a memory module for storing the reception signals for a plurality of measurements, and an interference detecting module for detecting an interference signal from the reception signals, the interference detecting module determining that the reception signal contains the interference signal when the reception signal has an intensity difference with the previous reception signal by more than a predetermined threshold for over a reference time period in one measurement. | 11-10-2011 |
| 20120087211 | LOW-POWER SECURITY AND INTRUSION MONITORING SYSTEM AND METHOD BASED ON VARIATION DETECTION OF SOUND TRANSFER CHARACTERISTIC - Disclosed are a method for measuring a acoustic transfer function of a predetermined space to be secured or monitored through a correlation between sound signals acquired from a sound source generating device and a sound measuring device and a method and a system for judging whether there is an intrusion object by using a difference between an initially set acoustic transfer function information and varied acoustic transfer function information by using the method for measuring the transfer function. In the present disclosure, when an object moves or an intrusion object is generated in a predetermined space, intrusion or no intrusion is monitored by variation of the acoustic transfer function varied by the intrusion object even though there is no noise generated by the intrusion object. | 04-12-2012 |
| 20120099398 | REMOTE FLOODED MEMBER DETECTION - Utilizing a sonar system to determine if a structural member of an underwater support structure that is supposed to be filled with air is instead flooded with water. The determination that a supposedly air filled structural member is instead flooded with water provides an indication that the structural member is cracked or damaged, making it easier to find damaged members and effect suitable repair. The sonar system is located a distance from the structural member so that it is spaced from the structural member. | 04-26-2012 |
| 20120099399 | SONAR DATA COLLECTION SYSTEM - A system that can be used for inspecting underwater structures. The system allows a user to gain a better understanding of the condition of an underwater structure. The system is a self-contained, modular system that can be operated by divers, coupled to an AUV, ROV or other host platform vehicle deployment platform, towed by a ship, pole mounted, or hull mounted. All of the components necessary to achieve the desired scanning functions are incorporated onto the self-contained, modular system. The system can include and fully utilize a 3D sonar system and an inertial navigation system. This combination of features permits the system to be used to, for example, generate 3D models of underwater structures, detect changes in underwater structures by comparing the generated 3D model against an a priori 3D model, and provide navigational updates to the host platform based on the observed features of an underwater structure. | 04-26-2012 |
| 20120120768 | SEMICONDUCTOR DEVICE AND METHOD OF FORMING SAME FOR CORRELATION DETECTION - In an embodiment a semiconductor device correlates a received signal with a known pattern. A correlation output is used as a basis for forming a confidence reference level. The confidence reference level and the correlation output are compared to identify a peak in the received signal indicating that a present signal state of the received signal contains the known pattern. | 05-17-2012 |
| 20120140596 | METHOD AND DEVICE FOR DETECTING TARGET OBJECT - This disclosure provides a target object detection device for outwardly transmitting a detection pulse and detecting a target object based on a returned reception signal. The device includes a first peak holding module for extracting, at every predetermined cycle, a maximum value of the reception signals obtained in the predetermined cycle, a second peak holding module for extracting, at the same predetermined cycle, a minimum value of the reception signals obtained in the predetermined cycle, and a target object determiner for determining a level rising and a level falling of the reception signal indicating the target object by using a gradient between the minimum and maximum values extracted at different peak holding positions. | 06-07-2012 |
| 20120147705 | Occupancy Sensing With Selective Emission - An occupancy sensing system includes a driver to emit energy in a space, and a sensor to detect energy reflected within the space. An electrical load for the space is controlled in response to an occupancy condition determined in response to the detected energy. The driver may be selectively de-energized. In some embodiments, the driver may be de-energized during all or a portion of an unoccupied period. In other embodiments, the driver may be de-energized during all or a portion of an occupied period. In some further embodiments, the driver may be de-energized in response to detecting other sources of the type of energy emitted by the driver. | 06-14-2012 |
| 20120195168 | METHOD FOR DETECTION OF A PLUME OF A FIRST FLUID WITHIN A SECOND FLUID - Methods and systems for detecting a plume of a first fluid in a second fluid using an acoustic wave are provided, where the first fluid has a different acoustic index of refraction than the second fluid. A horizontal array having a plurality of receiving elements receives an acoustic signal propagated through the second fluid and at least one refracted signal refracted by the first fluid. The acoustic signal and the at least one refracted signal form a received signal. An interference pattern is detected from the received signal over the plurality of receiving elements. The interference pattern is due to interference between the acoustic signal and the at least one refracted signal. A horizontal angle of refraction is determined between the acoustic signal and the at least one refracted signal from the interference pattern. The horizontal angle of refraction is indicative of a physical characteristic of the first fluid. | 08-02-2012 |
| 20120243374 | ACOUSTIC MOTION DETERMINATION - The motion of an object is characterised by transmitting acoustic signals over first and second transmitter-receiver channels. Information relating to signals received over the first channel is compared with information relating to signals received over the second channel, to identify a similar pattern in both channels arising from reflections from the object. A relative timing difference between the channels, associated with the similar pattern, is used to characterise the motion of the object. | 09-27-2012 |
| 20130028053 | OBSTACLE DETECTION SYSTEM - An obstacle detection system includes ultrasonic sensors and a controller. The ultrasonic sensors include first and second ultrasonic sensors. Each of them is located at either side of a vehicle bumper so that its own beam axis has an angle deflected in a horizontal direction from a surface-normal direction of the bumper and is directed towards an intermediate portion of the bumper. | 01-31-2013 |
| 20130176824 | APPARATUS AND METHOD FOR REALIZING SYNCHRONIZATION IMAGE - A method and apparatus for realizing a synchronization image. The method includes transmitting an ultrasonic signal to an object, obtaining vector components of at least two points included in the object based on an echo signal reflected from the object, and realizing a synchronization image of the object, which indicates whether motions of the at least two points have been synchronized, by using the obtained vector component. | 07-11-2013 |
| 20130215720 | DEVICE AND METHOD FOR THE DETECTION OF PERSONS - The invention relates to systems for the detection and identification (and/or differentiation) of objects for use in vehicles (stationary usage is also conceivable, e.g. to combat crime, building protection), wherein objects are detected and identified via ultrasound signals. In particular, the differentiation of pedestrians and cyclists from cars and fixed obstacles such as walls is of key focus. Ultrasound sensors are hereby used. By processing the signals and comparing them with reference signals, a differentiation between living and non-living objects is possible. | 08-22-2013 |
| 20130223188 | PROXIMITY DETECTING APPARATUS AND METHOD BASED ON AUDIO SIGNALS - Apparatus comprising at least one processor and at least one memory including computer code, the at least one memory and the computer code configured to with the at least one processor cause the apparatus to at least perform: determining at least one impulse response model pulse train from at least one audio signal; and determining an presence of an object from the at least one impulse model pulse train. | 08-29-2013 |
| 20130242701 | METHOD FOR DETECTING THE SURROUNDINGS OF A VEHICLE - A method for sensing the surroundings of a vehicle with a number of sensors, in which method during at least one echo cycle at least one echo information item about the surroundings is sensed by at least one sensor and is compressed using an algorithm, and in which the at least one compressed echo information item is transferred to at least one processing unit. | 09-19-2013 |
| 20130286783 | TARGET DETECTION AND TRACKING WITH MULTIPLE ULTRASONIC TRANSDUCERS - In an ultrasonic detection system utilizing multiple ultrasound transducers capable of both transmitting and receiving detection signals, the transducers are selectively operated to achieve immunity to ringdown delays or to optimize the detection of distant objects. For example, in one embodiment, object detection is performed within the field of a particular transducer channel by suppressing rather than activating that transducer; instead, the adjacent transducers on either side of the selected channel are driven simultaneously, and the selected channel's transducer is used only to receive. | 10-31-2013 |
| 20130301390 | OCCUPANCY SENSING WITH SELECTIVE EMISSION - A method includes energizing an ultrasound driver to emit ultrasonic energy in a space, sensing ultrasonic energy within the space, determining an occupancy condition of the space in response to sensing ultrasonic energy reflected from the ultrasound driver, and determining the occupancy condition of the space in response to sensing ultrasonic energy in the space that was not emitted by the ultrasound driver. | 11-14-2013 |
| 20140036631 | ACTIVE SONAR APPARATUS, ACTIVE SONAR SIGNAL PROCESSING METHOD, AND RECORDING MEDIUM STORING SIGNAL PROCESSING PROGRAM THEREOF - An active sonar apparatus which emits a sound wave and detects a target object based on a sound reflected by this target object including an FFT part which performs the fast Fourier transform of the received sound wave to derive a frequency spectrum and outputs this as an FFT signal, a normalization part which normalizes the FFT signal and outputs this signal as a normalized signal, and a noise elimination unit which performs a plurality of smoothing processes to the normalized signal, combines the signals to which the smoothing processes are performed to generate a combined signal, and outputs the combined signal in which a noise received together with the reflected sound is suppressed. | 02-06-2014 |
| 20140112101 | METHOD AND DEVICE FOR DETECTING PRESENCE OF VEHICLE IN PARKING SPACE - A method for notifying a user of the status of a parking space. The method comprises transmitting a pulse from a transceiver assigned to a parking space and for each pulse receiving by transceiver a corresponding echo created by said pulse being reflecting back from a object occupying said parking space. The method further comprises measuring corresponding echo time by a processing unit. The method further comprises comparing said corresponding echo time to a predefined range of echo times by a processing unit to determine occupancy of said parking space. The method further comprises using said occupancy of parking space to determine the parking space status by a processing unit, together with information on time of day and parking space permission. The method further comprises notifying a user of said parking space status by visual indication from at least one light emitting diode array. | 04-24-2014 |
| 20140119160 | LONG-RANGE ULTRASONIC OCCUPANCY SENSOR WITH REMOTE TRANSMITTER - An occupancy sensor device for monitoring a space includes a transmitter portion and a receiver portion. The receiver portion is located remotely from the transmitter portion. To enable reliable detection of occupancy within the monitored space, an estimate of the signal transmitted by the active sensor in the transmitter portion is compared to the signal received by the transmitted portion | 05-01-2014 |
| 20140169134 | ZONE CONTROLLER - A method includes transmitting a measurement command from a controller to an occupancy sensor with an address that corresponds to an occupancy sensor identifier. The measurement command causes the occupancy sensor to transmit an ultrasonic signal into a parking space, receive echo signals reflected back to the occupancy sensor, and determine, based on the echo signals, whether the associated parking space is occupied or empty. The method includes subsequently sending a status check to the occupancy sensor and receiving a response that includes the occupancy sensor's determination as to whether the associated parking space is occupied or empty. The method also includes calibrating the occupancy sensors from the controller. | 06-19-2014 |
| 20140247695 | METHOD FOR ROBUST AND FAST PRESENCE DETECTION WITH A SENSOR - A method is presented for detecting the presence of objects. The method differentiates animate objects within a presence detector detection area from inanimate objects within the detection area. Moving objects passing nearby the detection area are further distinguished from objects entering or leaving the detection area. The method distinguishes inanimate objects from dormant animate objects within the detection areas. | 09-04-2014 |
| 20140293746 | WADING DETECTION SYSTEM FOR A VEHICLE - A wading indicator system for a vehicle comprising: at least one sound wave pulse emitter device; at least one sound wave pulse receiver device; and a control unit. The control unit configured to measure one or more of the following variables: (i) the time of flight of a sound pulse between the at least one sound wave pulse emitter device and the at least one sound wave pulse receiver device; (ii) the amplitude of a sound pulse emitted by the at least one sound wave pulse emitter device when received by the at least one sound wave pulse receiver device; and (iii) the wavelength of a sound pulse emitted by the at least one sound wave pulse emitter device when received by the at least one sound wave pulse receiver device. Thereby the control unit is configured to determine whether at least a portion of the vehicle is immersed in water. | 10-02-2014 |
| 20140340992 | SYSTEM, METHOD AND COMPUTER PROGRAM PRODUCT FOR HUMAN PRESENCE DETECTION BASED ON AUDIO - Methods, systems and computer program products that allow for the determination of human presence in a room where content is being presented. The audio that is associated with the content may be captured, along with the audio that is being generated collectively by whatever sources may be in the room including the presentation of the content. Features may be extracted from both the content audio and the room audio. These features may then be compared, and the differences may be quantified. If the differences are significant, then human presence may be inferred. | 11-20-2014 |
| 20140355384 | SYSTEM AND METHOD TO DETECT HIDDEN MATERIALS USING AN ANDROID MOBILE TELEPHONE - A system and method using an Android cellular telephone to detect hidden materials, or contraband, in an automobile by measuring vibration. The mathematical formula frequency of vibration uses the mass M which affects the vibration. As mass of solid surface changes, so does the vibration. If difference in the vibration is detected between the inspected vehicle and empty vehicle that is the baseline, it may indicate hidden materials or contraband. The Android mobile cellular telephone contains components needed to implement this system and method. An accelerometer. A vibrator. A touch screen display. A computer operating system, Android, that runs Android Java software. SQLite, a computer database. A computer network connection to the internet using a wireless network. A GPS sensor to provide the latitude and longitude location of the phone during testing The phone also provides an electrical power source using the phone battery, or wall outlet electricity. | 12-04-2014 |
| 20140369168 | METHOD AND DEVICE FOR DETECTING OBJECTS IN THE SURROUNDINGS OF A VEHICLE - A device and a method for detecting objects in the surroundings of a vehicle is provided. At least one reflection pattern is ascertained for at least one object class. Pulse echo measurements for m different transmitter/receiver geometries are performed. Echo signals in the pulse echo measurements are detected. Weights for the different objects of the corresponding class are calculated. The weight values thus ascertained are summed to form a weight, and the presence of objects of the at least one object class is ascertained using the weights thus ascertained. | 12-18-2014 |
| 20150016224 | SIGNAL PROCESSING APPARATUS, OBJECT DETECTING APPARATUS, APPARATUS PROVIDED WITH OBJECT DETECTING FUNCTION, AND OBJECT DETECTING METHOD - Provided is a technology which is able to detect an object with high accuracy. A signal processing apparatus | 01-15-2015 |
| 20150049588 | METHOD FOR DETECTING NAVAL MINES AND NAVAL MINE DETECTION SYSTEM - The invention concerns a group of vessels ( | 02-19-2015 |
| 20150078130 | DEVICE AND METHOD FOR LATERAL ENVIRONMENT DETECTION OF A MOTOR VEHICLE - A device for lateral environment detection of a motor vehicle and a method for the substantially simultaneous operation of a parking support device and a door protection device is provided. The parking support device and the door protection device perform an environment detection with structurally identical environmental sensors. In order to be able to operate these simultaneously or overlapping in time, without interference by cross echo pulse occurring, it is provided to operate the simultaneously operated environmental sensors at frequencies that are shifted relative to one another and of which at least one of the frequencies is also shifted with respect to a resonance frequency of the environmental sensors. | 03-19-2015 |
| 20150331093 | CONTROLLING TRANSMISSION OF PULSES FROM A SENSOR - Apparatus for use in one of a plurality of sensors each having a respective transmitter which transmits pulses for sensing, a respective clock which controls timing of the pulses transmitted from the respective transmitter, and a respective receiver which receives echoed instances of the pulses. The apparatus comprises: sensing logic configured to sense a being or object in dependence on the echoed pulses received back by the respective receiver from the respective transmitter, and timing logic configured to compensate for a clock discrepancy between the respective clock and that of one or more others of the sensors. The timing logic does this by using the respective receiver to listen for instances of the pulses from the one or more other sensors, and adjusting the timing of the pulses from the respective transmitter based thereon. | 11-19-2015 |
| 20150338510 | CONTROLLING TRANSMISSION OF PULSES FROM A SENSOR - A sensor such as a presence sensor for use in a lighting system or other system that adapts to information from a plurality of active presence sensors. If transmissions from the active sensors are uncoordinated, the overall detection performance may be adversely impacted (e.g. due to potential cross-interference), which may make sensing over the detection coverage area defined by a single presence sensor (or the like) become unreliable. The disclosure presents protocols for coordinating transmissions in active sensing systems. The invention may be applied to various active modalities (e.g. ultrasound, RF), for example that find applications in indoor and outdoor lighting controls. | 11-26-2015 |
| 20150338517 | Proximity Detecting Apparatus And Method Based On Audio Signals - An apparatus includes at least one processor and at least one memory including computer code. The at least one memory and the computer code are configured to with the at least one processor to cause the apparatus to determine at least one impulse response model pulse train from at least one audio signal, and to determine a presence of an object from the at least one impulse model pulse train.
| 11-26-2015 |
| 20160077205 | Determining Whether A Target Object Was Present During A Scanning Operation - Methods, devices and systems for determining whether an object is detected by a scanner are disclosed. Fast-Fourier-Transforms (“FFT”) are determined, modified and evaluated. Each FFT may be determined with regard to a subset of gain-compensated pixel-values corresponding to pixel-values of an acquired image. | 03-17-2016 |
| 20160091604 | APPARATUS, SYSTEM AND METHOD FOR SPACE STATUS DETECTION BASED ON ACOUSTIC SIGNAL - An apparatus, a system and a method for space status detection based on acoustic signal are provided. The detecting apparatus includes an audio transmitting device, an audio receiving device, a signal processing device and a decision device. The audio transmitting device transmits an acoustic signal into a space. The audio receiving device receives a varied acoustic signal as a sensing signal. The signal processing device is coupled to the audio receiving device to receive the sensing signal and generates a characteristic parameter of a space status according to the sensing signal. The decision device is coupled to the signal processing device to receive the characteristic parameter and detects a change of the space status according to the characteristic parameter. | 03-31-2016 |
| 20160116584 | OBJECT DETECTION APPARATUS - An object detection apparatus is installed in a movable body and detects an object. The apparatus includes a first detection section which transmits search waves in a moving direction of the moving object, and receives reflected waves as detection information to detect the object, a second detection section which transmits search waves in the moving direction, and receives reflected waves as detection information, an obstacle determination section which determines that an obstacle is present in the moving direction, based on detection results of the first and second detection sections, and a crossing determination section which determines that the obstacle has crossed, in a state where the obstacle determination section determines that the obstacle is present, if the determination that the obstacle is present is made by continuous detection, and if a state where the object is continuously detected changes to a state where the object is not detected. | 04-28-2016 |
| 20160171890 | DEVICE FOR DETECTING PROXIMITY OF A VEHICLE AND SYSTEM FOR MONITORING PARKING SPACES OF A PARKING LOT | 06-16-2016 |
| 367094000 | By doppler effect | 6 |
| 20110164469 | Apparatus For Sensing Motion of A Surface - An apparatus for sensing motion of a surface comprises a stabilised platform comprising a support structure and a moveable mass resiliently suspended with respect to the support structure; a transmitter transducer and a receiver transducer mounted on the moveable mass, the transmitter transducer arranged to transmit an acoustic wave towards the surface, and the receiver transducer arranged to receive a reflected wave from the surface, and detection means for measuring motion of the surface based on a Doppler shift in the reflected wave. The detection means may comprise an amplifier arranged to receive a Doppler modulated signal from the receiver transducer, and a phase detector arranged to receive an amplified signal from the amplifier and to provide a demodulated output signal indicative of the motion of the surface. Preferably, the apparatus further comprises relative motion compensation means arranged to remove from the demodulated output signal phase noise caused by motion of the transducers, and to provide a surface motion output signal. | 07-07-2011 |
| 20120314541 | OBJECT DETECTION APPARATUS - An object detection apparatus disposed in a moving body generates a transmission signal of multiple pulse sequences as a plurality of sequences of multiple pulses. A modulation signal of the transmission signal is generated by performing digital modulation on each of the multiple pulse sequences of the transmission signal according to a code sequence. A transmission wave based on the modulation signal is transmitted and a reflected wave of the transmission wave is received by the apparatus. The apparatus further detects a speed of the moving body to determine a length of the code sequence. The apparatus calculates a code correlation value between the modulation signal and a received signal, which is derived from the reflected wave, and performs pulse compression on the received signal based on the code correlation value to generate a pulse-compressed received signal. The apparatus detects an object based on the pulse-compressed received signal. | 12-13-2012 |
| 20140169135 | METHOD OF DETECTION OF LOW-FREQUENCY AND ULTRASONIC ACOUSTIC SIGNALS WITHIN A PREDETERMINED TIME FRAME - A method for detecting an intrusion in a confined space is provided. The method includes the steps of detecting an ultrasonic acoustic signal with a Doppler shift and a low frequency acoustic signal, said signals being indicative of an intrusion, and generating an alarm if the ultrasonic acoustic signal with a Doppler shift and the low frequency acoustic signal were detected within an assigned timeframe. | 06-19-2014 |
| 20140241125 | MOVING BODY DETECTOR - In a malfunction detection mode, a controller is configured to compare an output of a phase-detector obtained when controlling to input an oscillation signal to only the phase-detector, with an output of the phase-detector obtained when controlling to input the oscillation signal to both of a transmitter and the phase-detector. If a change (difference) of signal levels of the outputs is equal to or more than a prescribed threshold, the controller determines that there is no malfunction in the transmitter and a receiver. If the change of the signal levels is less than the prescribed threshold, the controller determines that there is a malfunction in the transmitter or the receiver. | 08-28-2014 |
| 20140286132 | AN ULTRASOUND DOPPLER DETECTION METHOD WITH GOLAY CODE EXCITATION - An ultrasound Doppler detection method with Golay-encoded excitation is used to obtain the flow information of a moving object. A first Golay code is transmitted to the moving object for a reflection signal of the first Golay code and a second Golay code is transmitted to the moving object for a reflection signal of the second Golay code after waiting for a pulse repetition interval. The received reflection signals are match-filtered to generate a first and a second wave. The above steps are repeated several times. Then, a slow-time filter in the Doppler frequency domain whose low-pass cut-off frequency is a quarter of the pulse repetition frequency is used to filter out the first sidelobes of the first waves and the second sidelobes of the second waves. Finally, the ultrasound Doppler detection is formed according to the first mainlobes of the first waves and the second mainlobes of the second waves. | 09-25-2014 |
| 20150078131 | Apparatus For Sensing Motion Of A Surface - An apparatus for sensing motion of a surface comprises a stabilised platform comprising a support structure and a moveable mass resiliently suspended with respect to the support structure; a transmitter transducer and a receiver transducer mounted on the moveable mass, the transmitter transducer arranged to transmit an acoustic wave towards the surface, and the receiver transducer arranged to receive a reflected wave from the surface, and detection means for measuring motion of the surface based on a Doppler shift in the reflected wave. The detection means may comprise an amplifier arranged to receive a Doppler modulated signal from the receiver transducer, and a phase detector arranged to receive an amplified signal from the amplifier and to provide a demodulated output signal indicative of the motion of the surface. Preferably, the apparatus further comprises relative motion compensation means arranged to remove from the demodulated output signal phase noise caused by motion of the transducers, and to provide a surface motion output signal. | 03-19-2015 |
