Human body existence induction detection method and device based on Doppler radar, and storage medium

Abstract

The invention provides a human body existence induction detection method and device based on Doppler radar, and a storage medium. The method comprises the following steps: performing signal pretreatment on an intermediate frequency signal sampled in an induction range; judging whether a moving object exists in the current space or not through the human body motion detection signal; performing time-domain signal processing and analysis on the micro-motion and respiratory frequency range signals, and judging whether human body micro-motion or respiratory frequency exists in the current space or not; converting the time domain signal after signal pretreatment into a frequency domain signal, extracting a human body respiratory frequency signal through processing and spectral analysis of the frequency domain signal, and judging whether a human body exists in the current space or not; and according to the human body motion detection, the time domain breathing signal detection and the frequency domain breathing signal detection, judging the existence state of the human body in the current sensing range. According to the invention, interference signals can be effectively filtered, and the accuracy and sensitivity of human body existence detection are improved.

Description

technical field [0001] The present disclosure relates to the field of sensing technology, in particular to a Doppler radar-based human body presence sensing detection method, device, and storage medium. Background technique [0002] With the development of Internet of Things technology, various Internet of Things devices are becoming more and more popular. In order to improve the intelligence of various devices, it is necessary to provide various sensors for smart devices. Doppler radar sensor is one of them. It can make smart The device detects human body movement, micro-movement and even breathing and heart rate signals in a certain space to accurately determine whether there are people in the space. Doppler radar sensors are widely used in energy-saving lighting, smart home and security monitoring and other fields because of their good penetration and no influence of external ambient temperature. [0003] Traditional respiratory heart rate detection is basically contact-...

AI Technical Summary

Problems solved by technology

[0006] Filtering by hardware will increase the complexity of circuit design, and cannot adapt to the application of various complex scenarios. The versatility and flexibility are not enough, and the hardware cost is increased.

The existing FFT method usually processes the full-band Doppler signal to analyze whether there are people in the current environment. This method itself will be mixed with many interference signals, which increases the difficulty of breathing detection and takes a long time. Not conducive to the use of smart devices in various scenarios

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