Head Up Display System Based On At89s52 Car

Vehicle safety is one of the most important problems that people usually concern about. When a car is at high speed, especially at night, if the driver lowers his head to watch meters or audio display, he will not take effective measures in time when some emergencies appear suddenly. The vehicle head-up display system (HUD) will provide drivers with some critical data when driving, such as fuel amount, speed, mileage that has been traveled and so on, which enhance the driving comfort and ensure the safety of the drivers and passengers.At present, HUD has some preliminary applications in many cars in foreign countries. On the other hand, due to the price and limited space in cars, HUD has only appeared in some domestic high-grade cars. In view of the contradiction between the rapid increase in the number of domestic cars and the limited transport facilities, it is necessary to realize the HUD's popularization. Therefore, we must lower the cost without decreasing the display quality apparently. This paper is focused on AT89S52 using MCU +CPLD.This paper includes five chapters. The first chapter introduces the research background, the system control chips, and the main jobs. MCU AT89S52 is selected in the second chapter. It draws out the system scheme and completes the circuit hardware design. PCB board is finished by using PROTELL99SE. Power supply module, signal-sampling module, MCU, keyboard input, LCD module, and CPLD are designed. The third chapter completes the software design and the debugging in Keil environment. Then soft simulation is completed by dScope for Windows that is embedded inμVision2. The fourth chapter establishes the instantaneous FOV theory model. Several key parameters that affect FOV are identified. The effects of distance from images to the eyes and the angle of depression on the visual comfort are analyzed. The fifth chapter is a conclusion of the research.