Research on the signal collecting of gas sensors
SU Run1, CHEN Feng2, LIU Jin-huai1 (1.Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, China;2.Department of Automation, University of Science and Technology of China , Hefei 230061, China)
How to use serial port between computer and single chip processor to collect the signalof gas sensor and control the gas sensor sampling resistance and testing voltage are introduced.This system makes gas sensor testing change from manually operation to automation, which canraise the precision of testing. It also offers that computer can be connected to single chip processorby TC232CPE. We can also build compute measuring system based on RS232 by using gas sensors,ADC1678, AD7502, etc. Besides, we develop control program of collecting circuit by Delphi.