Dual technology sensor device with range gated sensitivity
AssigneeHoneywell International Inc.
InventorsThomas Babich, Christopher Martin
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Abstract
A method and device for detecting an intruder in a region with increased performance and decreased false alarms. The security device has a microwave sensor and a PIR sensor operatively coupled to a processor. To increase the performance of the security device the device determines distance information of an object in the region with the microwave sensor, processes the distance information to adapt a frequency response of the PIR sensor to provide a frequency adapted PIR signal, and determines if the object is an intruder by using the frequency adapted PIR signal.
Claims22
A method of detecting an intruder in a region, with a security device having a microwave sensor and a PIR sensor operatively coupled to a processor, comprising the steps of:
- a. determining distance information of an object in the region with the microwave sensor,
- b. processing the distance information to adapt a frequency response of the PIR sensor to provide a frequency adapted PIR signal, and
- c. determining if the object is an intruder by using the frequency adapted PIR signal.
A security device for detecting an intruder in a region comprising:
- a. a microwave sensor for providing a microwave signal,
- b. a PIR sensor for providing a PIR signal, and
- c. processing circuitry, said processing circuitry operatively coupled to said microwave sensor and said PIR sensor, adapted to:
- i. determine distance information of an object in the region using said microwave signal,
- ii. process the distance information to adapt a frequency response of the PIR sensor to provide a frequency adapted PIR signal, and
- iii. determine if the object is an intruder by using the frequency adapted PIR signal.
Dependencies are inferred from the claim text.