Gesture recovery and recognition method based on time domain Doppler effect

A recognition method and gesture technology, applied in the reflection/re-radiation of radio waves, measuring devices, instruments, etc., can solve the problems of simple application of limited gesture games and huge hardware cost, and achieve high sensitivity, low hardware complexity, The effect of strong robustness

Inactive Publication Date: 2014-05-14
ZHEJIANG UNIV
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Problems solved by technology

[0004] Traditional gesture recovery recognition uses computer image processing technology, which consumes huge hardware costs and require

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  • Gesture recovery and recognition method based on time domain Doppler effect
  • Gesture recovery and recognition method based on time domain Doppler effect
  • Gesture recovery and recognition method based on time domain Doppler effect

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[0023] Below in conjunction with accompanying drawing, specifically set forth the working principle and the implementation mode of the present invention:

[0024] like figure 1 As shown, the present invention uses a single-channel transmitter to transmit a single-frequency signal through an antenna. Due to the Doppler effect, the gesture motion information is modulated into the phase of the reflected signal; the receiving antennas of multiple receivers are placed in the best signal receiving position , Multiple receivers and transmitters share the same reference clock to ensure phase synchronization. The IF receiver module down-converts the RF reflection signal to IF, and the digital down-conversion module quadrature down-converts the IF signal to a digital baseband signal. Computer signal acquisition The module collects digital baseband signals, uses time-domain demodulation comprehensive algorithm signal processing, and performs time-domain Doppler gesture recovery recogniti...

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Abstract

The invention discloses a gesture recovery and recognition method based on the time domain Doppler effect. A one-way transmitter is adopted for transmitting a single-frequency signal through an antenna; because of the Doppler effect, gesture motion information is modulated into the phase position of a reflected signal; receiving antennae of a plurality of receivers are placed in the best signal receiving positions, the multiple receivers and the transmitter share a same reference clock, phase synchronization is guaranteed, a radio frequency reflection signal is down-converted into medium frequency by a medium frequency receiver module, the medium frequency signal is down-converted into a digital baseband signal in an orthogonal mode by a digital down-conversion module, the digital baseband signal is collected by a signal collection module of a computer, the signal is processed through a comprehensive algorithm of time domain demodulation, and then gesture recovery and recognition based on the time domain Doppler effect is carried out. The method is high in sensitivity and robustness and low in hardware complexity; the accurate two-dimensional and three-dimensional motion information of gestures can be accurately recovered; any motion of a hand can be detected with the method, and the method will be widely applied to the field of gesture recognition based on the Doppler effect.

Description

technical field [0001] The invention relates to a gesture recovery recognition method based on time domain Doppler. Background technique [0002] The wavelength of an object's radiation changes due to the relative motion of the source and observer. In front of the moving wave source, the wave is compressed, the wavelength becomes shorter and the frequency becomes higher; when behind the moving wave source, the opposite effect occurs. The wavelength becomes longer and the frequency becomes lower; the higher the velocity of the wave source, the greater the effect. This phenomenon is called the Doppler effect. [0003] In recent years, the use of microwave Doppler radar to detect the Doppler effect has been applied to the related research and equipment for detecting the motion of objects. Due to the advantages of high sensitivity and low hardware complexity of Doppler biological detection signals, it is widely used in the field of biological detection, heartbeat motion detec...

Claims

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Application Information

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IPC IPC(8): G06F3/01G01S13/50
Inventor 郑川冉立新
Owner ZHEJIANG UNIV
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