XIONG Si chang, TANG Hao ran, GAO Yu ke

（The Ministry of Education Key Lab of Mechanical Manufacture & Automation, Zhejiang University

of Technology, Hangzhou 310014, China）

 

Abstract: Aiming at the problem of calibrating detection accuracy of the gas leak detection device,after analysis of the simulation leak principle,the relationship between rotational velocity of the step motor and simulation leak rate was established.A simulation leak system based on change of volume was designed.The S3C2440 was used to be the primary controller and the hardware circuit was built.The stepper motor drive was designed to control the speed of electromotor and the photoelectric encoder drive was designed to exactly measure motor speed. Qt Creater was used to compile the graphical user interface program on the Linux operating environment,which can show real\|time simulation leak rate.Finally the experimental platform was set up to test system.The results indicate that the simulation leak system can provide the reliable basis for measuring detection accuracy of the gas leak detection device and have good prospect of application.

Key words: inspection accuracy; embedded Linux; stepper motor;simulation leak