System and method for implementing ranging microwave for detector range reduction
First Claim
1. A system for making a range reduction determination within a dual intrusion detector, the dual intrusion detector including at least one microwave sensor having a microwave coverage range and at least one passive infrared sensor having a passive infrared coverage range, the system comprising:
- multiple range bins for classifying microwave signals;
a range/size determination module for estimating a target range and size for a detected target based on a state of each of the multiple range bins; and
a range reduction component for determining whether at least one passive infrared sensor within the dual intrusion detector has a reduced passive infrared coverage range.
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Accused Products
Abstract
Embodiments of the present invention are directed to a method and system for use of ranging MW to detect range reduction in a dual (MW/PIR) intrusion detector. Embodiments of the invention utilize a Doppler microwave system capable of detecting an object range. Multiple range limited MW stages may be configured for different ranges to determine the general range of the moving object. Based on signal levels present on these MW stages, an approximate object range and size is determined. Embodiments of the invention recognize cases of PIR range reduction by use of range limited MW stages configured for different ranges to determine the general range of the moving object. If the MW recognizes a moving object of sufficient size within the coverage area, and if no PIR signal is present, the PIR is recognized as being blocked or disabled and notification is provided.
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Citations
30 Claims
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1. A system for making a range reduction determination within a dual intrusion detector, the dual intrusion detector including at least one microwave sensor having a microwave coverage range and at least one passive infrared sensor having a passive infrared coverage range, the system comprising:
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multiple range bins for classifying microwave signals; a range/size determination module for estimating a target range and size for a detected target based on a state of each of the multiple range bins; and a range reduction component for determining whether at least one passive infrared sensor within the dual intrusion detector has a reduced passive infrared coverage range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for making a range reduction determination within a dual detector system, the dual detector system including at least one microwave sensor having a microwave coverage area and at least one passive infrared sensor having a passive infrared coverage area, the method comprising:
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detecting a microwave signal from a target within the microwave coverage area in the absence of a passive infrared signal; determining a target range and size for a detected target from the received microwave signal; and comparing the target range to the passive infrared coverage range to determine whether the passive infrared coverage range is reduced. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 26)
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21. A method for making a range reduction determination for a dual intrusion detector, the dual intrusion detector including at least one microwave sensor having a microwave coverage range and at least one passive infrared sensor having a passive infrared coverage range, the method comprising:
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classifying a received microwave signal into a range bin; estimating a target range and size based on a range bin state comparison; and making a range reduction determination for the passive infrared sensor based on a comparison of the target range and the passive infrared coverage range. - View Dependent Claims (22, 23, 24, 25, 27, 28, 29, 30)
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Specification