摘要
随着社会的进步和人们生活水平的提高,汽车已普及到千家万户,车速里程表是汽车必不可少的重要仪表之一,为驾驶员提供车辆当前车速及里程信息。随着汽车电子技术的不断发展,目前市场上的车速里程表以电子式为主。基于霍尔传感器的工作原理,分析车速和里程的计算方法,并设计一种以STC89C52单片机为核心,由霍尔传感器检测、LCD液晶显示、蜂鸣器报警提示、按键输入、掉电存储等模块组成的新型电子式车速里程表,除了具有实时显示车速、里程功能、超速报警功能,并且增加手动设置传感器磁珠个数和轮胎直径,以及掉电存储数据功能,具有结构简单、体积小、实时性强、精度高、安全可靠等优点。
Along with social progress and the improvement of people＇s living quality, cars have spread to millions of households. As one of necessaryautomotive parts, speedometer can provide drivers the vehicle current speed and mileage information. With the development of automotiveelectronics, speedometer in the market is mainly electronic at present. Based on the principle of Hall sensor, analyzes the calculation meth-od of speed and mileage. And designs a new electronic speedometer with STC89C52 Microcomputer as the core, composes of Hall sensordetection, and LCD display, buzzer alarm, and key scan, and power-fail storage modules. This speedometer not only can display speed andmileage in real time, over speed alarm in time, but also can manually set the number of sensor magnetic beads and tire diameter, and storedata power down, has the advantages of simple structure, small size, real time, high precision, safety, reliability.
基金
山西大学商务学院科研项目(No.2016008)
