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

Active Publication Date: 2011-04-06
SIGNIFY HLDG BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The detection of people based on passive observation based on the time-varying nature of the RF signal is still unreliable and is not currently used

Method used

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  • Passive radar for presence and motion detection
  • Passive radar for presence and motion detection
  • Passive radar for presence and motion detection

Examples

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Embodiment Construction

[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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Abstract

A passive detector (10) includes a receiver (11) configured to collect passive radiation (12) in an environment, where detailed information about a portion of the passive radiation is estimated as a baseline of the passive energy. The passive energy is generated by a passive source unrelated to the detector. A monitor (24) is configured to measure a fluctuation in the baseline. A decision module (34) is coupled to the monitor to determine whether the fluctuation represents a presence or motion in the environment. Detection methods are also disclosed.

Description

technical field [0001] The present disclosure relates to electronic detection systems, and more particularly to systems and methods for detecting presence and motion by utilizing passive background energy. Background technique [0002] Motion and presence detection has received increasing attention. The main drivers include saving energy in office buildings as well as in the home. Motion detectors and sensors are estimated to grow rapidly in demand and are expected to exceed $9 billion by 2012. With this growing interest, there is a need for higher functionality sensors that enable omni-directional detection, low profile invisible sensors with minimal false alarms. More smart sensors are needed so as to be able to detect multiple persons and the positions of persons in a certain room or at a certain location. [0003] The idea of ​​passively detecting human motion by using RF waves in indoor environments has been presented in scientific publications. (See eg Nishi, M.; T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/00
CPCG01S13/003G01S7/354G01S13/886H05B47/115Y02B20/40G01S7/006G01S13/56
Inventor A·菲利皮B·K·斯雷达兰奈尔W·F·帕斯维尔T·M·J·范贝克尔
Owner SIGNIFY HLDG BV
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