Non-contact method and device for monitoring vital signs of multiple people in car

Abstract

The invention discloses a non-contact device for monitoring the vital signs of multiple people in a car. The device comprises an acquiring module, a processing module and a detecting module. In the acquiring module, pulse ultra-wide band radar is placed in the car to collect human body data; the processing module divides radar signals into different distance sections based on the fixed distances and reflecting area between the radar and all seats, human body moving signals are extracted from the each section, and different frequency signals with the corresponding number are decomposed out of the human body moving signals through a VMD algorithm; aiming at the problem of aliasing of the signals of the people in the car, aliasing interference of human body breath heartbeat signals at close range positions is removed at far range positions based on relativity, and meanwhile the breath heartbeat frequency of people is acquired at the same time. According to the device, the vital sign signals of people in the car can be acquired without contact through the car-mounted pulse ultra-wide band radar and are effectively monitored at the same time. Compared with the prior art, the device hasthe advantages of being low in power consumption, free of contact, good in privacy and the like.

Description

technical field [0001] The invention belongs to the field of occupant life state monitoring, and relates to a non-contact method and device for monitoring vital signs of multiple people in a vehicle. The non-contact monitoring of vital signs of multiple people in a vehicle is realized through a vehicle-mounted pulse ultra-wideband radar. Background technique [0002] In order to ensure vehicle driving safety, driver fatigue status monitoring has received extensive attention. At present, there are contact monitoring systems such as touch-type miniature photoelectric measuring instruments and ECG electronic chips placed on the steering wheel, which can obtain the driver's vital sign signals through the driver's contact with the steering wheel; there are also non-contact monitoring systems based on cameras or optical plethysmography. type of monitoring system. During the driving process of the vehicle, in addition to the status of the driver, the monitoring of the vital status...

AI Technical Summary

Problems solved by technology

The existing occupant vital signs monitoring system mainly obtains vital signs through contact sensors installed in the seat and non-contact imaging optical plethysmograph, but the sensors installed in the seat cannot effectively distinguish the occupant from the object. , consumes sensors and faces the threat of circuit damage; non-contact imaging optical plethysmographs need to image through the exposed area of ​​​​the skin, and the detection range is limited by light and the occlusion of clothing and seats

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