Doppler signal processing method and device based on presence detection

Abstract

The invention discloses a Doppler signal processing method and device based on existence detection. The method comprises the steps: obtaining a time-frequency digital information code corresponding to amplitude information of a Doppler signal in a frequency domain at different time windows through digital processing and time-frequency analysis of the Doppler signal; and based on a corresponding relation between speed components, with different frequency changes, of the human body and the corresponding actions, calling the time-frequency information codes of at least one time window, and comparing whether the frequency components of the time-frequency information codes of the called time window and the amplitude information of the corresponding frequency components meet the corresponding preset range or not to detect and recognize the action corresponding to the frequency in the preset range, so that whether the breathing action and / or the heartbeat action of the human body exist or not in a state of not limiting the static state of the human body is identified in view of the difference between the periodic continuity of the breathing action and / or the heartbeat action of the human body and other human body action frequency ranges and environment interference action frequency ranges.

Description

technical field [0001] The invention relates to the field of microwave detection, in particular to a Doppler signal processing method and device based on presence detection. Background technique [0002] Microwave detection technology works based on the principle of the microwave Doppler effect, which can detect the activities of a target space to determine whether there is a human body entering and existing in the target space, so that in subsequent applications, according to The corresponding detection results make specific controls on the corresponding electrical equipment. For example, the microwave detection technology can be applied to the lighting control of a lamp, specifically based on detecting whether there is a human body entering or existing in the use environment of the lamp, so as to control the lighting state of the lamp according to the detection result. Specifically, the corresponding microwave detector is fed by an excitation signal to transmit a microwav...

AI Technical Summary

Problems solved by technology

However, in this way, because the relevant frequency signals are filtered out and the magnification of the Doppler signal cannot be too large, the existing microwave detectors cannot detect the subtle movements of the human body, such as breathing, heartbeat and limbs. Therefore, when the human body is in a static state, there will be a misjudgment that the human body does not exist in the detection area, that is, it is impossible to accurately determine whether there is a human body in the detection area, which is not conducive to the detection of the microwave detector. Applications in the field of intelligence

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