[1] Bramanti M, Salerno E A, Tonazzini A et al. An acoustic pyrometer system for tomographic thermal imaging in power plant boilers[J]. IEEE Transactions on Instrumentation and Measurement, 45, 159-167(1996). http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=481329

[2] Li Y Q, Zhou H C, He Q W. Simulation study on monitoring the two-dimensional characteristics of the tangential flow field by using an acoustic method[J]. Proceedings of the CSEE, 23, 215-219(2003).

[3] Gaydon A G, Wolfhard H G[M]. Flames, 208-213(1990).

[4] Li C F. The technique in the measurement of temperature field by optical methods and its development[J]. Journal of Wuhan University of Science and Technology, 18, 66-68(2005).

[5] Bengtsson P E, Alden M. C2 production and excitation in sooting flames using visible laser radiation: implications for diagnostics in sooting flames[J]. Combustion Science and Technology, 77, 307-318(1991). http://www.tandfonline.com/doi/abs/10.1080/00102209108951733

[6] Wang H, Fu B, Liu G S et al. Temperature test of motor combustion gas flow field with thermographic instrument[J]. Journal of Solid Rocket Technology, 26, 65-67(2003).

[7] He B, Gong X H, Lin H et al. Application of infrared thermal imaging device in temperature measurement of solid rocket motor plume[J]. Journal of Solid Rocket Technology, 28, 153-156(2005).

[8] Thakur M, Vyas A L, Shakher C. Measurement of temperature and temperature profile of an axisymmetric gaseous flames using Lau phase interferometer with linear gratings[J]. Optics and Lasers in Engineering, 36, 373-380(2001). http://www.sciencedirect.com/science/article/pii/S0143816601000562

[9] Yan S Y, Chang Z, Wang F et al. Effect of dust accumulation on focal energy flux density distribution of trough solar concentrator and concentration optimization[J]. Acta Optica Sinica, 37, 0722002(2017).

[10] Qu D S, Hong Y J, Wang G Y et al. Study on mass flux measurement methods of gas based on scanning wavelength modulation spectroscopy[J]. Chinese Journal of Lasers, 43, 0904006(2016).

[11] Feng T Z, Liu C M, Zhao R X et al. Schlieren methods: a review of techniques[J]. Journal of Ballistics, 89-96(1994).

[12] Wang G J, Yang Z J, Meng S et al. Application of quantitative background oriented schlieren in laminar axisymmetric flame temperature measurement[J]. Journal of Experiments in Fluid Mechanics, 30, 103-110(2016).

[13] Kurihara N, Nishikawa M, Watanabe Aet al. A combustion diagnosis method for pulverized coal boilers using flame-image recognition technology[J]. EC-, 1, 99-103(1986).

[14] Collins S. Advanced flame monitors take on combustion control[J]. Power, 137, 75-78(1993).

[15] Huang Y, Yan Y, Riley G. Vision-based measurement of temperature distribution in a 500 kW model furnace using the two-colour method[J]. Measurement, 28, 175-183(2000). http://www.sciencedirect.com/science/article/pii/S0263224100000105

[16] Wang B X, Li T D, Wu Z S. The study of image processing technique used for luminous-flame temperature distribution measurement[J]. Journal of Engineering Thermophysics, 10, 446-448(1989).

[17] Zhou H, Lü X L, Li Q Y et al. Temperature measurements using the background oriented schlieren technique[J]. Proceedings of the CSEE, 31, 63-67(2011).

[18] Liu T C, Merzkirch W, Oberste-Lehn K. Optical tomography applied to speckle photographic measurement of asymmetric flows with variable density[J]. Experiments in Fluids, 7, 157-163(1988). http://link.springer.com/article/10.1007/BF02332980

[19] Murphy J C, Aamodt L C. Photothermal spectroscopy using optical beam probing: mirage effect[J]. Journal of Applied Physics, 51, 4580-4588(1980). http://scitation.aip.org/content/aip/journal/jap/51/9/10.1063/1.328350

[20] Xing J H. Influence of temperature on the refractive index nonlinearity of gas[J]. Physics Experimentation, 25, 35-36, 39(2005).

[21] Hao J S, Zhou J K[J]. Measurement of flame temperature of wine lamp Education in Chemistry, 2004, 5-7.