Perimeter monitoring system
First Claim
1. A perimeter monitoring system comprising:
- a. a first and a second mounting apparatus each comprising a tube comprising an axial interior slot and a pivot;
b. a reflector assembly positioned to receive a beam of light along a segment of a perimeter of an area to be monitored and to provide a returned beam, the reflector assembly comprising a reflector secured to the pivot of the first mounting apparatus; and
c. a monitor comprising;
(1) an enclosure; and
(2) a circuit board comprising an emitter that provides the beam of light and a detector that provides a signal when an interruption of the returned beam is detected, wherein;
(a) the circuit board is mounted in the slot of the second mounting apparatus; and
(b) the pivot of the second mounting apparatus is secured to the enclosure; and
(3) an alarm controller that activates an alarm in response to the signal.
1 Assignment
0 Petitions
Accused Products
Abstract
A perimeter monitoring system is arranged to detect passage across a perimeter of an area. The system primarily includes an emitter, a retroreflector, a detector and an alarm. The emitter provides a modulated visible laser beam. The retroreflector is arranged to direct the beam along a segment of the perimeter and return the beam along the segment. The detector includes a device that blocks reception of light outside an angle of less than 5 degrees. One or more local or remote alarms are activated in response to the signal. For example, a remote alarm is located on the inside of a residence window where it is activated by another visible laser beam. Alignment of the peripheral monitoring system is less costly and false alarms are less likely than with known systems.
33 Citations
20 Claims
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1. A perimeter monitoring system comprising:
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a. a first and a second mounting apparatus each comprising a tube comprising an axial interior slot and a pivot;
b. a reflector assembly positioned to receive a beam of light along a segment of a perimeter of an area to be monitored and to provide a returned beam, the reflector assembly comprising a reflector secured to the pivot of the first mounting apparatus; and
c. a monitor comprising;
(1) an enclosure; and
(2) a circuit board comprising an emitter that provides the beam of light and a detector that provides a signal when an interruption of the returned beam is detected, wherein;
(a) the circuit board is mounted in the slot of the second mounting apparatus; and
(b) the pivot of the second mounting apparatus is secured to the enclosure; and
(3) an alarm controller that activates an alarm in response to the signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A perimeter monitoring system comprising:
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a. a reflector positioned to receive a beam of light along a segment of a perimeter of an area to be monitored and to provide a returned beam;
b. a monitor comprising;
(1) an emitter that provides the beam of light;
(2) a detector that provides a first signal when an interruption of the returned beam is detected;
(3) an alarm; and
(4) a controller comprising a timer that, when activated, reverts to being inactive after lapse of a period of time, wherein;
(a) the controller activates the alarm to provide a first warning when the timer is active; and
(b) the controller activates the alarm to provide a second warning in response to the first signal when the timer is inactive; and
(c) the controller activates the timer in response to a second signal; and
c. a receiver that provides the second signal. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A perimeter monitoring system comprising:
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a. a reflector positioned to receive a beam of light along a segment of a perimeter of an area to be monitored and to provide a returned beam; and
b. a monitor comprising;
(1) an emitter that provides the beam of light when not disabled;
(2) a detector that provides a first signal when an interruption of the returned beam is detected;
(3) an alarm; and
(4) a controller comprising a timer that, when activated, reverts to being inactive after lapse of a period of time, wherein;
(a) the controller activates the alarm to provide an warning in response to the first signal;
(b) the controller activates the timer in response to the first signal; and
(c) the controller disables the emitter when the timer is active. - View Dependent Claims (17, 18)
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19. A perimeter monitoring system comprising:
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a. a reflector positioned to receive a beam of light along a segment of a perimeter of an area to be monitored and to provide a returned beam;
b. a remote alarm comprising a remote transmitter that transmits a status signal and a remote receiver that receives an alert signal and activates a first alarm in response to the alert signal; and
c. a monitor comprising;
(1) an emitter that provides the beam of light;
(2) a detector that provides a first signal when an interruption of the returned beam is detected;
(3) a second alarm;
(4) a transmitter that transmits the alert signal in response to the first signal;
(5) a receiver that provides a second signal in response to receiving the status signal; and
(6) a controller comprising a timer that provides a third signal in response to absence of the second signal for a period of time, wherein;
(a) the controller activates the second alarm to provide a first warning in response to the first signal when the timer is active; and
(b) the controller activates the second alarm to provide a second warning in response to the third signal. - View Dependent Claims (20)
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Specification