Patent application number | Description | Published |
20090014654 | PASSIVE INFRA-RED DETECTORS - A passive infra-red detector including at least three sub-detectors, each sub-detector being operative to receive infra-red radiation from a corresponding one of at least three sub fields-of-view, each sub field-of-view being exclusively defined by an optical element which does not define any other sub field of view, the sub fields-of-view being angled with respect to each other, adjacent ones of the sub fields-of-view being separated by a gap of no more than 30 degrees and at least one of the sub fields-of-view having at least one of the following characteristics: extending over no more then 45 degrees in azimuth; and including not more than three azimuthally distributed detection zones, and signal processing circuitry, operative to receive output signals from the sub detectors and to provide a motion detection output. | 01-15-2009 |
20090146063 | PASSIVE INFRA-RED DETECTORS - A passive infra-red detector including at least three sub-detectors, each sub-detector being operative to receive infra-red radiation from a corresponding one of at least three sub fields-of-view, each sub field-of-view being exclusively defined by an optical element which does not define any other sub field of view, the sub fields-of-view being angled with respect to each other, adjacent ones of the sub fields-of-view being separated by a gap of no more than 30 degrees and at least one of the sub fields-of-view having at least one of the following characteristics: extending over no more then 45 degrees in azimuth; and including not more than three azimuthally distributed detection zones, and signal processing circuitry, operative to receive output signals from the sub detectors and to provide a motion detection output. | 06-11-2009 |
20090309029 | PASSIVE INFRARED DETECTORS - An infrared motion detector including at least one infra-red radiation sensor, at least one radiation reflecting surface, operative to direct radiation impinging thereon towards the at least one infra-red radiation sensor and at least one coating layer, coating the at least one radiation reflective surface, which is substantially reflective to far infra-red radiation and which strongly absorbs at least one of visible light and near infra-red radiation, wherein the at least one coating layer includes black nickel. | 12-17-2009 |
Patent application number | Description | Published |
20090302222 | Passive Infrared Detectors - A passive infrared detector assembly including a detector housing comprising a window transparent to far infrared radiation, at least one sensor sensitive to the far infrared radiation and disposed within the detector housing and an anti-masking subassembly, including at least one light guide having a serrated light aperture, the light aperture defining a plurality of teeth like portions and a plurality of grooves and being disposed close to the outside of the window, at least one infrared light emitter operative to emit near infrared radiation via the light aperture of the at least one light guide and a near infrared radiation receiver operative to receive radiation emitted by the at least one near infrared light emitter and to measure the level of received near infrared radiation and to provide a masking alarm signal upon detection of a predetermined change in the level of the received near infrared radiation. | 12-10-2009 |
20130119253 | MOTION DETECTION SYSTEMS AND METHODOLOGIES - A motion detector system including first and second pairs of pyro-electric elements, electrical interconnections between the pyro-electric elements in the first pair providing a first signal output and local temperature compensation for the elements in the first pair, electrical interconnections between the elements in the second pair providing a second signal output and local temperature compensation for the pyro-electric elements in the second pair, wherein the compensation for the first pair is independent of the compensation for the second pair, a housing enclosing the two pairs of pyro-electric elements and defining a window, only one of the pyro-electric elements in each pair viewing a motion detection field of view through the window, and a signal processor receiving the first and second signal outputs and providing an output indication of crossing the field of view by an object having a temperature different from the ambient in the field of view. | 05-16-2013 |
20130328712 | SYSTEMS AND METHODS FOR DETECTING A CHANGE IN POSITION OF AN OBJECT - A system for detecting a change in position of at least one object within an at least partially enclosed space, the system including at least one transmitter repeatedly producing at least two mutually distinguishable standing waves in the at least partially enclosed space at mutually exclusive and mutually alternating times, at least one receiver receiving reflected energy of the at least two mutually distinguishable standing waves, the reflected energy from the at least two mutually distinguishable standing waves having mutually different amplitudes which have a difference therebetween, and a computerized processor receiving outputs from the at least one receiver and calculating changes in the difference between the mutually different amplitudes, which changes indicate the change in position of the at least one object. | 12-12-2013 |
20140167952 | AUTOMATIC INTRUSION DETECTOR THRESHOLD CONTROLLING SYSTEMS AND METHODS - A system for automatically controlling intrusion thresholds of intrusion detectors deployed in a premises, the system including intrusion detector output receiving functionality operative to receive at least one output from at least a first intrusion detector deployed in the premises, intrusion detector output comparison functionality operative to compare the at least one output from the at least a first intrusion detector with at least one of a multiplicity of premises intrusion detection patterns, and intrusion detector threshold controlling functionality operative, in response to ascertaining that the at least one output from the at least a first intrusion detector matches at least one of the multiplicity of premises intrusion detection patterns, to automatically tune a threshold of at least a second intrusion detector deployed in the premises. | 06-19-2014 |
20150194036 | GLASS BREAKAGE DETECTION SYSTEM AND METHOD OF CONFIGURATION THEREOF - A glass breakage detector system including an audio sensor, room-specific evaluation function generating functionality operative to generate at least one room-specific audio signal alarm evaluation function based on at least one of at least one acoustic parameter characterizing a room in which the audio sensor is located and at least two of the following environmental parameters: a size of the room, at least one size of at least one glass element in the room, at least one type of the at least one glass element in the room and at least one distance between the at least one glass element and the audio sensor, and alarm generation functionality operative to receive outputs from the audio sensor and to generate a glass breakage alarm when the outputs from the audio sensor fulfill criteria established by the at least one room-specific audio signal alarm evaluation function. | 07-09-2015 |