Intruder detector system
First Claim
1. An intruder detection system for detecting a presence of an intruder in an area to be protected, the system comprising:
- (a) a light source for emitting a light beam for scanning the area to be protected and for reflecting from a target, such that said light beam becomes a reflected light beam;
(b) a detector for receiving said reflected light beam; and
(c) an signal processor for determining a value from said reflected light beam, and for comparing said value to a previously stored value, such that a change in said value indicates the presence of the intruder.
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Accused Products
Abstract
An intruder detection system for detecting the presence of an intruder in a protected area. A light beam, preferably from a laser, is reflected from a target, which is a potential intruder. The time period required for the beam to return to a light detector, as well as the intensity of the reflected light, is recorded. The system includes a computer and software for analyzing the measurements of distance and intensity of reflected light. The algorithm for detecting the presence of an intruder is based on changes in the measured distance and/or intensity of reflected light from initial measurements made during a “learning” period. The system tacks targets using data collected in consecutive searches of the area to be protected. Preferably, an alarm is sounded and/or a video camera is slaved to the system.
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Citations
41 Claims
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1. An intruder detection system for detecting a presence of an intruder in an area to be protected, the system comprising:
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(a) a light source for emitting a light beam for scanning the area to be protected and for reflecting from a target, such that said light beam becomes a reflected light beam;
(b) a detector for receiving said reflected light beam; and
(c) an signal processor for determining a value from said reflected light beam, and for comparing said value to a previously stored value, such that a change in said value indicates the presence of the intruder. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 22, 23)
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13. A detection device for detecting a target in an area, comprising:
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(a) a light source for emitting a light beam;
(b) a mirror for bending said light beam;
(c) a motor for rotating said mirror, such that said light beam is able to contact at least a portion of the area and is able to reflect from the target, such that said light beam becomes a reflected light beam;
(d) a detector for receiving said reflected light beam; and
(e) an signal processor for determining a value selected from the group consisting of an intensity of said reflected light beam and a distance fo said light source from said target. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. A method of detecting an intruder in an area to be protected, comprising the steps of:
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(a) scanning the area with a beam of light;
(b) collecting light reflected from a target to form collected light;
(c) determining a value from said collected light;
repeating steps (a) to (c) at least once to determine at least a first value and a second value; and
(e) analyzing said first value and said second value to determine if said target is the intruder. - View Dependent Claims (28, 29, 30, 31)
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24. A detection device for detecting a target in an area, the device comprising:
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(a) a light source of emitting a light beam;
(b) a mirror for bending said light beam;
(c) a rotation shaft for supporting said mirror;
(d) a motor for rotating said mirror, said motor being rotatably connected to said rotation shaft, such that said light beam is scanned around the area and such that said light is a reflected light beam; and
(e) an encoder for determining a shaft angular positions, such that an angle of said mirror is determined according to said shaft angular position and such that said light beam contacts at least a portion of the area, such that the target is detected in the area according to said reflected light beam. - View Dependent Claims (25, 26, 27)
(f) a shaft, said case being rotatably connected to said shaft, said shaft being rotated by said motor, such that said case is rotated;
(g) a power source for supplying power to said motor and to said light source; and
(h) a plurality of slip rings, said slip rings being electrically connected to said power source and to said motor and to said light source, such that power is supplied to said motor and to said light source from said power source.
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32. A method of monitoring an area for intruders, comprising
sweeping a beam of light across a path of the area multiple times; -
monitoring light reflected from targets along said path as the beam of light is swept across the path;
storing numerical representations of said reflected light within a memory; and
evaluating said numerical representations to determine whether a target is an intruder. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41)
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Specification