提要本文介绍了一种由SG码盘式液位传感器和微机构成的自动水位采集系统.该系统采用普通TTL集成片构成数据的串行传送和接口电路.由二条光电隔离电流环路分别担负控制信号和水位数据的传递.配合相应的微机程序,实现水位数据的自动采集.这种系统具有电路简单,成本低,调试容易,传输可靠和测量精度高等特点,适用于泵站和其他水利工程的水位检测和控制,也适应于工业供水和城乡给排水系统的水位自动检测. Abstract This paper introduces an automatic water level acquisition system composed of SG code disc liquid level sensor and microcomputer.The system adopts the serial transmission and interface circuit of common TTL chip to form data and is controlled by two photoelectric isolated current loops respectively Signal and water level data transmission.With the corresponding computer program to achieve automatic water level data acquisition.This system has the characteristics of simple circuit, low cost, easy commissioning, reliable transmission and high measurement accuracy, suitable for pumping stations and other water conservancy projects Water level detection and control, but also to adapt to the industrial water supply and urban and rural water supply and drainage system automatically detects the water level.