摘要
以SST89C51单片机为控制核心设计的电阻测试仪,该系统主要由主控制模块SST单片机控制、5110液晶显示模块、AD转换模块、独立键盘模块和直流稳压电源组成。以SST单片机作为控制核心,以TLC2543芯片作为A/D转换核心,TL082电压比较芯片来稳定信号、12位精度AD,速度较快,适用于强干扰和要求速度较高的场合。以独立键盘实现功能切换,通过单片机的I/O口直接控制继电器开关来间接实现对该系统的控制,减少了误差和抖动。经测试,各项功能均达到指标,且稳定。
Based on SST89C51 microcontroller as control core to design the resistance tester,the system is mainly controlled by the main control module,SST MCU 5110 LCD module,AD conversion module,keyboard module and DC regulated power supply.Based on SST single chip microcomputer as control core,using TLC2543 chip as the core of A/D conversion,TL082 voltage chip to stable signal,12 AD precision,fast, suitable for strong interference and high speed.In order to achieve the function of the keyboard to switch independently,through the MCU I/O port directly control the relay switch to realize the indirect control of the system,reduce the error and jitter.After testing,all functions are to reach targets,and stable.
出处
《电子测试》
2013年第4S期47-48,共2页
Electronic Test
