Journal
SENSORS
Volume 13, Issue 4, Pages 4157-4169Publisher
MDPI
DOI: 10.3390/s130404157
Keywords
optical gas leak sensor; IR absorption spectrum; ethylene; dimethyl ether; methane
Funding
- National Science Fund for Distinguished Young Scholars [51205373]
- Basic Research Projects Shanxi Province [2012021013-4]
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In this paper, we present an approach to develop an optical gas leak sensor that can be used to measure ethylene, dimethyl ether, and methane. The sensor is designed based on the principles of IR absorption spectrum detection, and comprises two crossed elliptical surfaces with a folded reflection-type optical path. We first analyze the optical path and the use of this structure to design a miniature gas sensor. The proposed sensor includes two detectors (one to acquire the reference signal and the other for the response signal), the light source, and the filter, all of which are integrated in a miniature gold-plated chamber. We also designed a signal detection device to extract the sensor signal and a microprocessor to calculate and control the entire process. The produced sensor prototype had an accuracy of +/- 0.05%. Experiments which simulate the transportation of hazardous chemicals demonstrated that the developed sensor exhibited a good dynamic response and adequately met technical requirements.
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