In-vehicle life body leaving detection method and device and vehicle safety control method and device

Abstract

The invention provides an in-vehicle life body leaving detection method. The in-vehicle life body leaving detection method comprises the following steps: acquiring radar intermediate frequency signal data; performing distance dimension Fourier transform on the radar intermediate frequency signal data to obtain distance dimension FFT data, and accumulating and storing the distance dimension FFT data; performing speed-dimension Fourier transform on the distance-dimension FFT data to obtain speed-dimension FFT data, and accumulating and storing the speed-dimension FFT data; generating a distance-time atlas and a speed-time atlas according to the accumulation; according to the distance-time atlas and the speed-time atlas obtained through accumulation, comparing the distance-time atlas and the speed-time atlas with calibrated in-vehicle air environment data, and determining whether the interior of the vehicle is an air environment or not; on the basis of the distance-time atlas and the speed-time atlas obtained through accumulation and the calibrated in-vehicle air environment data, obtaining in-vehicle life body detection is conducted, and a life body detection result; and performing sliding window processing on the next radar intermediate frequency signal data of each frame. when the vehicle is parked, the dangerous situation that the life body is trapped in the vehicle can be found in time.

Description

technical field [0001] The invention relates to the technical field of millimeter-wave radar, in particular to a method for detecting remaining living organisms in a vehicle through millimeter-wave radar. Background technique [0002] With the development of the economy, the advancement of science and technology, and the rapid development of the automobile industry, automobiles have gradually become popular in people's lives and brought a lot of convenience to people. However, there are still some defects in automobiles, such as being left behind due to negligence Babies or sleeping adults in the car stay in a confined space for a long time, and tragedies such as suffocation are prone to occur. Therefore, monitoring the residence time and conditions of living organisms in the car and issuing an alarm when necessary can reduce the probability of such accidents. It can be seen that the social demand for in-vehicle vital body monitoring is very urgent. [0003] In the prior ar...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the living body detection algorithm based on the millimeter-wave radar is mainly based on the human body motion signal for discrimination. First, the distance-angle map is used to determine the target position, and then the corresponding body motion signal is extracted according to the target position information to obtain the body motion signal. Afterwards, the calculation of breathing and heartbeat is carried out, and finally the living body information is obtained. This kind of method only monitors the human body. The body movement signal of animals is different from that of the human body and is not compatible. The extraction of effective body movement signals requires the target to be relatively still. When the target shakes can not be obtained; there are still some methods for target feature extraction based on radar point cloud data, mainly including target RCS area, intensity, contour and other features. High, requires radar with high angular resolution and radar data processing capability

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