Cross-zone supervision for a security system
First Claim
1. A method of determining an error condition in a target security device, the method comprising:
- detecting a fault a plurality of times by a first security device arranged to sense activity in a first zone, the target security device being arranged to sense activity in a second zone overlapping with the first zone, the first security device and the target security device are remotely located from each other and in a separate housing; and
determining the error condition in the target security device when the target security device signals no fault for the plurality of times.
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Accused Products
Abstract
An error condition, fault, defect, obstruction, or defective arrangement of viewing angle is determined in a target security device, such as a motion sensor. A plurality of times a fault is detected in a first security device arranged to sense activity in a first zone, the target security device being arranged to sense activity in a second zone overlapping with the first zone; and the error condition may be determined in the target security device when fault in the target security device is not detected for the plurality of times. The second zone may overlap substantially all of the first zone. The first security device may be a door security sensor, a gate security sensor, a keypad or a motion detector. When the first security device is a keypad or user interface, the fault may be an arm or disarm command or an arm/disarm command cycle.
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Citations
19 Claims
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1. A method of determining an error condition in a target security device, the method comprising:
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detecting a fault a plurality of times by a first security device arranged to sense activity in a first zone, the target security device being arranged to sense activity in a second zone overlapping with the first zone, the first security device and the target security device are remotely located from each other and in a separate housing; and determining the error condition in the target security device when the target security device signals no fault for the plurality of times. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A security control system configured to determine an error condition in a target security device, the device comprising:
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a signal processor configured to detect triggering a fault a plurality of times in a first security device arranged to sense activity in a first zone, the target security device being arranged to sense activity in a second zone overlapping with substantially all of the first zone, the first security device and the target security device are remotely located from each other in a separate housing; and a controller configured to determine the error condition in the target security device when a fault in the target security device is not detected for the plurality of times. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification