Optic Method to Measure the Density of Gas and the Analysis on Uncertainty of Measurement

Abstract:

A optic method to measure the density of gas is put forward. That is, by using the optical Wedge structure to build air chamber and chamber for gas under test, and by measuring the differences of the optical Wedge interference fringes of the two rooms, the density of gas has been measured. The interference theory of Wedge has been theoretical analyzed, and a formula which can be used to measure the refractive index of gas is put forward, and the uncertainty of the measurement has been analyzed. The parameters of gas density, refractive index and gas thickness have been used in the formula. The results show that the method of optical Wedge interference is practical, and high measurement accuracy is achievement when the density of gas is high.

• Periodical: Advanced Materials Research (Volumes 361-363)
• Pages: 226-231
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.361-363.226
• Online since: October 2011
• Authors: Chang Li Guo, Yan Qing Zhang
• Keywords: Gas, Interference, Refractive Index, Wedge

References

[1] H.S.YIN, W.Deng, G.Hua, Coal project，Vol.5(2006),p.59(in Chinese)

[2] Y. Qin,Mining safety and environmental protection, Vol.37(2010),p.47(in Chinese)

[3] J.L. Zhang, Z.B. Wang, X.Li, journals of zhongbei university,Vol.29(2008),p.68(in Chinese)

[4] H.Fu, D.X.Li, Coal electrical machinery，Vol.1(2008),p.31(in Chinese)

[5] B.D. Wang, Industrial and mining automation，Vol.4(2007),p.24(in Chinese)

[6] Z.Z. Yin, 2010,The Design and Research of the Fibre-optical gas sensor, Master's Thesis, University of Science and Technology of HeNan. (in Chinese)

[7] X.F. Zhang,2009,The Research of the Wireless Gas Sensor, Master's Thesis, University of Science and Technology of HeNan. (in Chinese)

[8] D.Yan CHEN,2007,Design of Portable Methane measuring instrument, Master's Thesis, HeFei University of technology. (in Chinese)

[9] Z.M.Xu, R. Liu, Z. J. Liu, Coal technology，Vol.3(2007),p.67(in Chinese)

[10] Ch.L. Guo, Q.S. Meng, X.C. Yuan. physics experiment. Xi'an: Shaanxi Science and Technology Press, 2006,pp.7-20 ,in press (in Chinese).