Research and Design of Distributed Carbon Monoxide (CO) Concentration On-Line Detection System

A kind of carbon monoxide (CO) density distributed on-line detection system is designed based on single chip microprocessor (SCM) technology and CAN bus technology, etc. Collection signal by sensor is converted by conditioning circuit and sent into SCM AT89C51. When CO concentration beyond setting limits value, field alarming and ventilation equipment are droved to start, which assures CO concentration value is within prescribed limit. In addition, field slave station connects with master station through CAN bus, which field CO concentration density monitoring, data analyzing and processing in real time is carried out. This paper introduces system hardware design and part of software proceeding. Through experiment, detection precision is not more than 3% from 20 to 1000 ppm of CO concentration. This system can be applied to coal mine, coke oven basement, and intelligent building monitor, etc.