车载抬头显示器系统研究

The Study of Head up Display System Which is Used for Car

为了解决汽车司机驾驶时需要频繁低头查看仪表盘时容易忽略前方路况信息,从而造成交通事故发生的问题,将早期应用到战斗机上的抬头显示系统(Head Up Display,以下简称HUD)引用到汽车上,使司机无需低头即可查看车辆运行时的一些重要参数信息。采用STM32单片机作为主控,将接收到的数据信息显示在像源上,将像源中的信息透射到反光镜中,再反射到合成器上,司机通过合成器即可观察到像源上显示的内容。为了验证本设计的HUD上能显示准确的温度值并且显示的信息能随环境亮度而变化,采用温度传感器采集水温的信息来模拟温度传感器采集汽车水箱的温度信息;采用光敏传感器检测不同光照强度来调节像源的亮度。实验结果表明,像源能在不同光照强度下都能实时显示水温变化的信息,且在合成器上显示的信息稳定、可靠。

In order to solve the problem that the driver of a car needs to frequently look down at the dashboard when driving,it is easy to ignore the information on the road ahead.And causing the problem of traffic accidents.Head-up display(hereinafter referred to as HUD)is used to refer to a car which is applied to fighter aircraft early.The driver can view some important parameter information while the vehicle is running without looking down.Using STM32 microcontroller as master,the received data information is displayed on the image source.The information in the image source is transmitted into the mirror.Then reflecting on the synthesizer.The driver can observe the content displayed on the source through the synthesizer.In order to verify that the design of the HUD can display accurate temperature values and the displayed information can change with the brightness of the environment.A temperature sensor is used to collect water temperature information to simulate the temperature sensor collecting the temperature information of the automobile water tank,a light sensor is used to detect different light intensities to adjust the brightness of the image source.The experimental results show that the image source can display the information of water temperature change in real time under different light intensities,and the information displayed on the synthesizer is stable and reliable.