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.
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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