本设计是基于89C51单片机为控制核心的汽车液压油箱燃油量电控系统设计。系统采用了浮筒式电阻型传感器,实现液面高度的测量。通过ADC0808模数转化元器件实现由模拟信号转化为数字信号,并把数字信号输入AT89C51单片机。为了让液面高度显示更加直观,系统采用了共阴极的LED数码管构成显示模块,此模块用于实时的显示液面高度信息,当液面过低、过高或者正常时,分别有相应的报警提示和控制电路。其中,通过PID调节算法来获得控制信号,以达到自动调节之目的。 The design is based on the 89C51 microcontroller as the core of the car hydraulic fuel tank fuel control system design. The system uses a buoy resistance sensor, to achieve the liquid level measurement. By ADC0808 modulus conversion components from analog signals into digital signals, and the digital signal input AT89C51 microcontroller. In order to make the liquid level display more intuitive, the system uses a common cathode LED digital display module, the module for real-time display of liquid level information, when the liquid level is too low, too high or normal, respectively, there is a corresponding Alarm prompt and control circuit. Among them, the PID control algorithm to obtain control signals to achieve the purpose of automatic adjustment.