System and method for improving microwave detector performance using ranging microwave function
First Claim
1. A system for improving false alarm immunity for a microwave intrusion detector, the system comprising:
- multiple range bins for classifying microwave signals including a microwave alarm stage bin for determining an alarm state of the microwave intrusion detector;
a range evaluation mechanism for estimating a target range based on a state of each of the multiple range bins; and
a microwave alarm stage bin sensitivity determination mechanism for determining an optimal microwave alarm stage bin sensitivity level based on the estimated target range.
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Abstract
Embodiments of the present invention are directed to a method and system for use of ranging MW to decrease MW intrusion detector false alarms. A Doppler microwave system may be provided that is capable of detecting an object range and adjusting the sensitivity of an alarm stage of a MW detector to account for object size and 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 may be determined. The sensitivity of the MW alarm stage is then adjusted based on a MW alarm state sensitivity vs. object range function that is optimized to alarm on humans and ignore small animals and insects. The method and system may be used in detection systems incorporating a MW sensor.
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Citations
28 Claims
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1. A system for improving false alarm immunity for a microwave intrusion detector, the system comprising:
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multiple range bins for classifying microwave signals including a microwave alarm stage bin for determining an alarm state of the microwave intrusion detector; a range evaluation mechanism for estimating a target range based on a state of each of the multiple range bins; and a microwave alarm stage bin sensitivity determination mechanism for determining an optimal microwave alarm stage bin sensitivity level based on the estimated target range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for minimizing false alarms due to small animals and insects in a coverage area of a microwave intrusion detector system, the method comprising:
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determining a target range for a detected target from received microwave signals; and adjusting an alarm threshold of a microwave alarm stage bin based on the determined target range, wherein the alarm threshold is at a first level when the detected target is a short range target and second level when the target is a longer range target, such that the first level may be higher or lower than the second level depending on MW sensitivity in a short range and a long range. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for improving false alarm immunity for a microwave intrusion detector, the method comprising:
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classifying a received microwave signal into a range bin; estimating a target range based on a range bin state comparison; and determining an optimal microwave alarm stage bin sensitivity based on the estimated target range. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28)
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Specification