Apparatus and method for locating boundaries of detection zones covered by a passive infrared detection system
First Claim
1. An audio indicator apparatus for locating boundaries of a plurality of optically divided detection zones covered by a passive infrared detection system having collecting means for simultaneously collecting infrared rays from said zones of an area to be monitored, and detector means for detecting a change in an intensity of said infrared rays collected by said collecting means and for generating a first signal having an amplitude responsive to said change, the apparatus comprising:
- generating means, to be connected to an audio output device audible in said area, for producing a second signal continuously responsive to said first signal, said second signal being variable and indicative of activity of said detection system at a point, within said area to be monitored, where an infrared radiation emitting object is moved within said area, said second signal permitting detection of said boundaries of said zones, said generating means including an audio frequency signal generator and a modulator controlled by said first signal for modulating an output of said generator.
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Abstract
An audio indicator apparatus for locating boundaries of optically divided detection zones covered by a passive infrared detection system having a collector for collecting infrared rays from the zones of an area to be monitored, and a detector for passively detecting infrared rays collected by the collector and for generating a first signal having an amplitude responsive to the rays collected by the collector, which includes a signal generator to be connected to a speaker for producing a second signal responsive to the first signal, the second signal being indicative of activity of the detection system at a point, within the area to be monitored, where an infrared radiation emitting object is moved, to locate the boundaries of the zones.
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Citations
12 Claims
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1. An audio indicator apparatus for locating boundaries of a plurality of optically divided detection zones covered by a passive infrared detection system having collecting means for simultaneously collecting infrared rays from said zones of an area to be monitored, and detector means for detecting a change in an intensity of said infrared rays collected by said collecting means and for generating a first signal having an amplitude responsive to said change, the apparatus comprising:
generating means, to be connected to an audio output device audible in said area, for producing a second signal continuously responsive to said first signal, said second signal being variable and indicative of activity of said detection system at a point, within said area to be monitored, where an infrared radiation emitting object is moved within said area, said second signal permitting detection of said boundaries of said zones, said generating means including an audio frequency signal generator and a modulator controlled by said first signal for modulating an output of said generator. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An audio indicator apparatus for locating boundaries of a plurality of optically divided detection zones covered by a passive infrared detection system having collecting means for simultaneously collecting infrared rays from said zones of an area to be monitored, and detector means for detecting a change in an intensity of said infrared rays collected by said collecting means and for generating a first signal having an amplitude responsive to said change, the apparatus comprising:
generating means, to be connected to an audio output device audible in said area, for producing a second signal continuously responsive to said first signal, said second signal being variable and indicative of activity of said detection system at a point, within said area to be monitored, where an infrared radiation emitting object is moved within said area, said second signal permitting detection of said boundaries of said zones, said generating means including a voltage controlled oscillator which is fed said first signal, to produce said second signal whose frequency varies with the amplitude of said first signal.
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9. A method of locating boundaries of a plurality of optically divided detection zones covered by a passive infrared detection system having collecting means for collecting infrared rays from said zones of an area to be monitored, and detector means for detecting a change in an intensity of said infrared rays collected by said collecting means and for generating a first signal having an amplitude responsive to said change, comprising the steps of:
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a) moving an infrared emitting object within said area to be monitored; b) producing a second signal continuously responsive to said amplitude of said first signal, said first signal being responsive to said object moved in step a); c) generating an audio frequency signal; d) modulating said audio frequency signal using said second signal to produce a modulated audio signal audible in said area responsive to said second signal; and e) said second signal permitting detection of at least one of said boundaries by using said modulated audio signal produced in step d). - View Dependent Claims (10, 11, 12)
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Specification