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In this paper, We propose a novel method of measuring glass thickness by means of multi-beam laser heterodyne. Based on the Doppler effect and the heterodyne technology, loading the information about the glass thickness into the frequency difference of the multi-beam laser heterodyne signals by sinusoidal frequency modulation of the oscillating mirror that is in a simple harmonic motion, we can simultaneously obtain many values of the glass thickness through the multi-beam laser heterodyne signal demodulation. Processing these values by weighted-average, the glass thickness can be obtained accurately. This novel method is used to simulate the measurements for different glass thicknesses by MATLAB, the obtained result shows that the relative measurement error obtained by using this method is just 0.008%.
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Keywords:
- multi-beam laser heterodyne /
- laser Doppler technology /
- Fourier analysis /
- non-contact measurement
[1] Zhao W Q, Feng Z D, Qiu L R 2007 Chin. Phys. 16 1624
[2] Chen Z Q, Cheng N P, Shi Z G 2004 Chin. Phys. 13 1549
[3] Wang Y T, Yang N , Wen X C 2008 Microcomputer Information 9 309 (in Chinese) [王玉田, 杨妮, 闻学超 2008 微计算机信息 9 309]
[4] Wang W, Wang Z B 2006 Instrumen Technique and Sensor 2 44 (in Chinese) [王伟, 王召巴 2006 仪表技术与传感器 2 44]
[5] Chen Z C 2008 Optical Instruments 30 20 (in Chinese) [陈志超 2008 光学仪器 30 20]
[6] Yang G, Cui D Y, Mao X M 2001 Research onlaser measurement system for float glass thickness inproduction line (Xian: Xian Jiaotong University) p586(in Chinese) [杨刚, 崔东印, 毛信梦 2001 浮法玻璃激光在线测厚的研究 (西安:西安交通大学) 第586页]
[7] Song C, Lu C, Guo Q, Hu Y R 2008 Acta Photonica Sinica 37 1635 (in Chinese) [宋晨, 吕岑, 郭琪, 扈映茹 2008 光子学报 37 1635]
[8] Shu K U, Dasnc 2006 Optics & Laser Technology 38 552
[9] Kathryn J W, Richard R C, GUN Young Lee 2007 Article in Press 10 62
[10] Maru Y I, Mitsu Y 2002 Appl. Opt. 41 1315
[11] Bing H, Cabestaing F 2005 Transactions on Instrumentation and Measurement 1 222
[12] Gan C L, Nie Z Q, Li L, Shen L J, Zhang Y P, Song J P, Li Y Y, Zhang X C, Lu K Q 2007 Chin. Phys. 16 3407
[13] Ke J H, Lin Z Q, Wang X H 2003 Chin. Phys. 12 443
[14] Li Y C, Zhang L, Yang Y L, Gao L Xu B, Wang C H 2009 Acta Phys. Sin. 58 5473(in Chinese) [李彦超 章亮 杨彦玲 高龙 徐博 王春晖 2009 物理学报 58 5473]
[15] Li Y C, Wang C H, Qu Y, Gao L, Cong H F, Yang Y L, Gao J, Wang A Y 2011 Chin. Phys. B 20 014208-1
[16] Zhang E F, Dai H Y, Chen P X 2011 Chin. Phys. B 20 024201
[17] Yao Z X, Zhong J W, Mao B N, Pan B L 2008 Chin. Phys. B 17 578
[18] Li H G, Zhang Y T, Cao D Z, Xiong J, Wang K G 2008 Chin. Phys. B 17 4510
[19] Deng Y Q, Sun Q , Yu J 2011 Acta Phys. Sin. 20 028102 (in Chinese) [邓玉强, 孙青, 于靖 2011 物理学报 20 028102]
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[1] Zhao W Q, Feng Z D, Qiu L R 2007 Chin. Phys. 16 1624
[2] Chen Z Q, Cheng N P, Shi Z G 2004 Chin. Phys. 13 1549
[3] Wang Y T, Yang N , Wen X C 2008 Microcomputer Information 9 309 (in Chinese) [王玉田, 杨妮, 闻学超 2008 微计算机信息 9 309]
[4] Wang W, Wang Z B 2006 Instrumen Technique and Sensor 2 44 (in Chinese) [王伟, 王召巴 2006 仪表技术与传感器 2 44]
[5] Chen Z C 2008 Optical Instruments 30 20 (in Chinese) [陈志超 2008 光学仪器 30 20]
[6] Yang G, Cui D Y, Mao X M 2001 Research onlaser measurement system for float glass thickness inproduction line (Xian: Xian Jiaotong University) p586(in Chinese) [杨刚, 崔东印, 毛信梦 2001 浮法玻璃激光在线测厚的研究 (西安:西安交通大学) 第586页]
[7] Song C, Lu C, Guo Q, Hu Y R 2008 Acta Photonica Sinica 37 1635 (in Chinese) [宋晨, 吕岑, 郭琪, 扈映茹 2008 光子学报 37 1635]
[8] Shu K U, Dasnc 2006 Optics & Laser Technology 38 552
[9] Kathryn J W, Richard R C, GUN Young Lee 2007 Article in Press 10 62
[10] Maru Y I, Mitsu Y 2002 Appl. Opt. 41 1315
[11] Bing H, Cabestaing F 2005 Transactions on Instrumentation and Measurement 1 222
[12] Gan C L, Nie Z Q, Li L, Shen L J, Zhang Y P, Song J P, Li Y Y, Zhang X C, Lu K Q 2007 Chin. Phys. 16 3407
[13] Ke J H, Lin Z Q, Wang X H 2003 Chin. Phys. 12 443
[14] Li Y C, Zhang L, Yang Y L, Gao L Xu B, Wang C H 2009 Acta Phys. Sin. 58 5473(in Chinese) [李彦超 章亮 杨彦玲 高龙 徐博 王春晖 2009 物理学报 58 5473]
[15] Li Y C, Wang C H, Qu Y, Gao L, Cong H F, Yang Y L, Gao J, Wang A Y 2011 Chin. Phys. B 20 014208-1
[16] Zhang E F, Dai H Y, Chen P X 2011 Chin. Phys. B 20 024201
[17] Yao Z X, Zhong J W, Mao B N, Pan B L 2008 Chin. Phys. B 17 578
[18] Li H G, Zhang Y T, Cao D Z, Xiong J, Wang K G 2008 Chin. Phys. B 17 4510
[19] Deng Y Q, Sun Q , Yu J 2011 Acta Phys. Sin. 20 028102 (in Chinese) [邓玉强, 孙青, 于靖 2011 物理学报 20 028102]
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