Vehicle-mounted driver monitoring system

Abstract

The invention provides a vehicle-mounted driver monitoring system which comprises a front shell, a rear cover, an LED lamp panel and a chip board. The front shell is fixedly connected with the rear cover, a cavity is formed between the front shell and the rear cover, the LED lamp panel and the chip board are arranged in the cavity, the LED lamp panel is fixedly installed in the front shell, the LED lamp panel is in heat conduction contact with the front shell, the chip board is fixedly installed on the rear cover, and the chip board is in heat conduction contact with the rear cover. Accordingto the vehicle-mounted driver monitoring system, the LED lamp panel and the chip board are separately arranged, so that heat generated by an LED is prevented from being transferred to an imaging chipto affect clear imaging of the imaging chip, and meanwhile, partition temperature control over the LED and the imaging chip is facilitated.

Description

technical field [0001] The invention relates to the field of camera technology, in particular to a vehicle driver monitoring system. Background technique [0002] After driving for a long time, the driver is prone to imbalance of physiological and psychological functions, objectively, the phenomenon of declining driving skills, and there is a great potential safety hazard. Features such as fatigue driving monitoring system. Among them, DMS (Driver Monitoring System, driver monitoring system) captures the driver's facial features through the lens and infrared light source, accurately marks the specific position, and analyzes the driver's driving behavior according to changes in pupils, face, and gaze direction. Anxiety level, fatigue status, etc., in order to remind the driver to take a proper rest. [0003] The LED provides an infrared light source for the lens to capture the driver's facial features, and the imaging chip converts the captured light signal into an electric...

AI Technical Summary

Problems solved by technology

[0005] DMS is used in the cockpit of a car. The front shell 61 is made of plastic, which is PC / ABS (a mixture of polycarbonate and acrylonitrile-butadiene-styrene copolymer), and the thermal conductivity is very low (PC / ABS The thermal conductivity coefficient is about 0.25W / M*K), and the heat dissipation effect is relatively poor. The maximum temperature of the front housing 61 is 87°C, and the maximum temperature of the rear cover 62 is 35°C, with a difference of more than 50°C. The rear cover 62 participates in heat dissipation If the degree is not enough, it will also cause the temperature on the imaging chip 631 to be too high, which will affect the clear imaging of the imaging chip 631

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