METHOD AND SYSTEM FOR DETECTING AN INDIVIDUAL BY MEANS OF PASSIVE INFRARED SENSORS
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Abstract
The invention relates to a method and a system for detecting an individual in a given observation zone by means of N passive infrared sensors (1) each consisting of an optical device (2) provided with a matrix of cells focusing the infrared energy (IR) received onto a single pyro-electric component (3) linked to a calculation unit (4) able to interpret the information received. The device according to the invention is characterized in that it consists, in order to detect an individual in the observation zone, in employing a limited number of N similar infrared sensors (1) centred on the same observation zone, each provided with 2N−cells (2C), and hence beams (F), which for each of the latter are masked, according to a different combination in such a way as to provide the calculation unit with the information enabling the individual to be located in terms of position and displacement.
15 Citations
16 Claims
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1-8. -8. (canceled)
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9. A method for detection of an individual in a given observation zone by means of N passive infrared sensors, each adapted to receive infrared energy emitted by an individual traversing the zone, each infrared sensor including an optical device focusing the received infrared energy onto a single pyro-electric component, each optical device including a matrix of cells, of the lens or mirror type, arranged in order to pick up a plurality of beams according to a well-defined horizontal distribution and distribution vertical, each pyro-electric component being coupled to a calculation unit adapted to interpret the received data, the method comprising:
in order to detect an individual in the observation zone, arranging a small number of similar infrared sensors, focusing on a common area of observation, each provided with 2N−
1 cells, each masked according to a different combination in order to provide, to the computing unit, data to locate the individual in terms of position and movement.- View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
Specification