车速与车室温度采集及液晶显示系统的设计

The design of the car speed and room temperature acquisition and LCD system

针对当前车载采集系统实时性差、可视化效果差等问题,提出一种车速与车室温度采集及液晶显示控制系统。该采集系统通过车载霍尔式轮速传感器和DS18B20温度传感器对车辆运行速度和车室温度进行实时监控,将采集到的信号实时传入中央处理单元(STC89C52单片机)。以操作简便的uVision2软件作为测试平台,通过编写程序在处理单元内完成信号去噪、滤波,将最终的处理结果输出显示到1602液晶屏上。该系统能够及时准确的采集到车速信号和温度信号,适用范围更广。

For the current car collection system,s poor problems of real-time performance and visual effect, the article proposes a kind of speed and car room temperature acquisition and display control system. This acquisition system real-time monitoring the vehicle speed and vehicle room temperature through the hall effect type wheel speed sensor and DS 18B20 temperature sensor and transfer the real-time signal into the central processing unit （STC89C52 SCM）. It uses the simple and convenient operation uVision2 software as a test platform and finishes signal denoising, filtering through the programming in processing unit and displayes the results on 1602 LCD panel. The system can timely and accurately collect speed signal and temperature signal, which has more extensively applicable scope .