Passive radar for presence and motion detection
A moving and passive technology, applied in measuring devices, using re-radiation, radio wave measurement systems, etc., can solve the problems of not being used, unreliable detection, etc., and achieve the effect of improving reliability
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[0016] This disclosure describes systems and methods for detecting indoor motion of objects, particularly people, without radiating any power. Use detailed knowledge of existing radio signals in the air to characterize how the signal changes over time. By doing so, the presence and / or movement of people can be distinguished in the environment.
[0017] It should be understood that the present invention will be described in terms of motion sensing; however, the teachings of the present invention are much broader and are applicable to any component that can be detected by altering a local electromagnetic signal. The embodiments described here are preferably used in security or other detection systems, but may also be used in photography applications or any other application where motion sensing or presence of life needs to be detected. The sensors or detectors described herein may be implemented using semiconductor devices, software, printed wiring boards, and any other electro...
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