Abstract:
A pyroelectric presence identification system includes focal plane array and a processor coupled to the focal plane array. The focal plane array includes a first image sensor and a plurality of second image sensors configured to convert radiant energy into an electrical signal. The processor is configured to control the focal plane array in a sleep mode wherein the first image sensor is utilized to detect gross motion of at least one presence and the plurality of second image sensors are de-energized.
Abstract:
Eine Alarmvorrichtung für eine Einbruchmeldeanlage umfasst einen Befestigungsabschnitt zum Befestigen der Alarmvorrichtung an einer Gebäudewand; eine Detektionseinrichtung zum Detektieren einer Bewegung in einer Überwachungszone, die einen vertikal unterhalb der Alarmvorrichtung befindlichen Bereich umfasst, wobei die Detektionseinrichtung dazu angepasst ist, bei Detektion einer Bewegung in der Überwachungszone ein Bewegungsfeststellungssignal zu erzeugen; einen Signalausgang zum Ausgeben des Bewegungsfeststellungssignals an eine Alarmzentrale der Einbruchmeldeanlage;einen Signaleingang zum Empfangen eines Sirenensteuersignals von der Alarmzentrale der Einbruchmeldeanlage; und eine Sirene zum Erzeugen eines akustischen Alarmsignals in Ansprechen auf das empfangene Sirenensteuersignal. Dabei ist die Alarmvorrichtung als Einheit ausgebildet, in welcher die Detektionseinrichtung und die Sirene integriert sind.
Abstract:
L'invention concerne un détecteur de présence de personne, multimodal et très compact. Le détecteur comprend sur une même puce de silicium (10) réalisée en technologie CMOS une première matrice de pixels, rendus sensibles au rayonnement infrarouge lointain par le dépôt d'une couche pyroélectrique, convertissant en charges électriques le rayonnement infrarouge lointain reçu, juxtaposée avec au moins une deuxième matrice de pixels sensibles à la lumière visible, convertissant en charges électriques la lumière visible reçue, et un circuit de lecture des charges engendrées dans chacune des matrices par la lumière visible ou le rayonnement infrarouge lointain, le détecteur comprenant encore, au-dessus de la puce de silicium, un élément optique (16) de focalisation du rayonnement infrarouge lointain sur la première matrice, avec un élément optique de focalisation de la lumière visible sur la deuxième matrice.
Abstract:
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.
Abstract:
A system and method of discerning human intrusion from animal presence without compromising sensitivity to human intruders exhibiting low intensity infrared signatures. At least four infrared sensing elements are arranged with at least one horizontal pair and at least one vertical pair, such as within a quad-sensing element device. To generate an intrusion alert in a pet-immune mode, simultaneous changes in infrared energy must be registered in at least two vertically adjacent detection zones spanning two tiers of sensing elements, corresponding to detecting a standing or semi-standing human intruder. Intrusion is generated in a non-pet-immune detection mode in response to registering sufficient infrared activity within any one or more individual detection zones. The focal lengths of the lens elements and position of the lens tiers are configured to produce a vertical separation of detection tiers sufficient to prevent a pet from simultaneously occupying space in two vertically adjacent detection zones.
Abstract:
A passive movement indicator, for the surveillance of an area, comprises at least one sensor (21) of pyroelectric material which receives the radiation (4) from the surveillance area. On the side facing the radiation (4), the sensor is covered with an electrode (215) of a first kind, whereas it is covered with a second electrode (216) of a second kind on the side opposite to the radiation (4). The contact surfaces between the sensor and a substrate (110) are nothing but a fraction of the whole surface. The arrangement of the electrodes of the first and the second kinds as well as the electric connection thereof with resistances (3), are such that there are formed propagation time elements for the displacement of the load, the latter being produced by the radiation (4). A logic circuit (14) calculates the impact point of the radiation (4) to the sensor (21) by means of the propagation time differences and/or the amplitude values of the load displacement produced by the radiation.
Abstract:
A double-eye crime prevention sensor system has a first pair of detection shafts (6) set so as to extend in substantially the same direction horizontally some distance apart within a predetermined space, and a second pair of detection shafts (7) each set so as to extend substantially in the same direction as each of the first shafts (6) some distance above or below the first shafts (6). An energy-focusing element (4) for focusing the radiation energy incident along the shafts is disposed at the end of the two pairs of detection shafts, two pairs of radiation energy-sensing elements (8) and (9) disposed at the focus positions corresponding to the two pairs of detection shafts in the vicinity of the focus of the focusing element in such a manner that two elements (8a), (8b) or (9a), (9b) forming the elements (8) or (9) are each connected to produce a substantially composite sensing output when radiation energy is detected with a time lag, and a signal processor is provided for generating an alarm when the two composite sensing outputs from the sensor elements coincide in the element-array direction to produce the energy-detecting time lag of the two composite sensing outputs from the sensor elements.
Abstract:
A volumetric occupancy counting system that may be applied to a security system of a building management system includes a focal plane array (62) and a Fresnel lens (75). The focal plane array has a plurality of radiant energy sensors (82) configured to convert radiant energy into an electrical signal. The Fresnel lens has a plurality of lenslets (02) each including a focal length configured to map one occupant into a pre-determined number of radiant energy sensors of the plurality of radiant energy sensors.
Abstract:
A housing assembly includes a base and a front assembly assembled with the base. The base includes a bottom and a sidewall that surrounds a peripheral edge of the bottom, and the front assembly is configured to engage with the sidewalls and close an open end of the base. The front assembly includes a latch that protrudes inward from an inner surface, and a spring-biased cam is rotatably supported on the base. The cam includes a cam surface that is engaged with the latch in such a way that rotation of the cam about the rotational axis results in a translation of the front assembly relative to the base in a direction parallel to the cam rotational axis. The cam is manually actuated using a tool.