脉冲激励式多路传感器接口电路  

Interface Circuit with Multi-channel Sensors Excited by a Pulse Generator

作　　者：廉双喜[1] 邹强[1] 

机构地区：[1]国家海洋局海洋技术研究所,天津300111

出　　处：《海洋技术》2001年第4期60-65,68,共7页Ocean Technology

摘　　要：本文介绍的脉冲激励式多路传感器接口电路 ,在一个等幅脉冲源对多路传感器激励的同时 ,用一个由串行DAC和比较器组成的逐位逼近 ADC,受控于 87C5 1单片机 ,完成多路信道的数字化。作者已完成的 12位 ADC,由一个 5 V脉冲源激励 C、T、D、 p H、DO、Ref等传感器 ,每 30 s一次 8路扫描。该电路简单、经济 。An interface circuit for multi-channel sensors is introduced in this paper. While an equal-scale pulse generator exciting the multi-channel sensors, a ADC, composed with a serial DAC and a comparator, controlled by the 87C51 SCM, completes digitization of the multi-channel. A 12-bit ADC has been developed using 5V pulse generator to impel the sensors such as conductivity, temperature, depth, pH, dissolved oxygen and reference. This interface circuit is simple and economical, and suitable for water quality monitoring.

关 键 词：传感器 脉冲激励 接口电路 模糊转换器 海洋水文 水质检测 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] P716[自动化与计算机技术—控制科学与工程]