DING Hong-ying(丁红英)1,2, ZHAO Zhan(赵湛)1, XUAN Yun-dong(轩运动)1,2, FANG Zhen(方震)1
(1. The State Key Laboratory of Technology, Institute of Electronics, Beijing 100190, China;2. Graduate University, Chinese Academy of Sciences, Beijing 100190, China)
Abstract：To measure the performance of high precision air-pressure sensors in below normal pressure, an automatic measurement instrument has been designed and implemented. It can simulate environment of low pressure from 300 hPa to 1 000 hPa with high accuracy by proportional-integral-derivative (PID) control quickly, and it can also generate various relative humidity by two-pressure control. The results show that this instrument can reach controlled pressure quickly. And it works well with the minimum average pressure difference, and the fluctuation is±0.02 hPa at 500 hPa. And it can keep in a stable status for a long time. It works well in performance testing of pressure sensors.The structure of the system is simple, takes small investment , and can be operated conveniently.
Key words：automatic measurement; two- pressure; pressure sensor; proportional integral derivative (PID) control
CLD number： TP212.1 Document code： A
Article ID： 1674-8042(2013)01-0006-04 doi： 10.3969/j.issn.1674-8042.2013.01.002
References
[1] ZHANG Wen-dong，YIN Long-de，DING Yi-min, et al. Low dewpoint standard humidity generator using two-temperature and two-pressure method. Shanghai Measurement and Testing, 2002, 29(1): 24-26.
[2] YE Jian-xiong, ZHANG Fa-yun. Application of PLC in constant air pressure control. Proc. of the 2010 International Conference on Intelligent Computation Technology and Automation, IEEE Computer Society, WA,USA, 2010, 1: 771-773.
[3] HE Feng-you, BAO Wei-ning ZHANG Bing, et al. Research of an unattended intelligentized control system of air compressor for supplying constant-pressure air. In: Proceedings of the Second International Conference on Intelligent Computation Technology and Automation, 2009, 1: 838-841.
[4] XIE Jian-ying. Micro-computer control technology, Shanghai: Shanghai Jiaotong University, 1985.
[full text view]
