Differential pressure volume compensation
leak detection system based on embedded system
XIONG Sichang, LI Dong, GAO Yuke, HUANG Jian
(The Ministry of Education Key Lab of Mechanical Manufacture & Automation， Zhejiang
University of Technology, Hangzhou 310014, China)
Abstract: Aiming at the problem that the differential pressure gas leakage detection system can′t be used in some volume unknowable tests, a new device based on the principle of differential pressure volume compensation leak detection was hoped to solve the problem effectively. The S3C2440 which has a high processing speed was used in the embedded system design, and combined with some related circuits, like the analog circuit, proportional valve circuit, and stepper motor driver circuits, the hardware structure was provided. The software part was designed on the Linux 2.6.30 kernel, some drivers programs were contained, a human interface was built on Qt/E kits. Finally, some comparative analysis were made between these embedded system and another similar system worked on PC. The results indicate that the system works stably and the relative error always occurs in allowed range, so it satisfies the portable and convenient function and has practical worthiness.
Key words: volume compensate; leakage detect; S3C2440; embedded system