Research of laser velocity measurement technology based on fast cross-correlation method with transfer function
-
摘要: 激光技术测量是实现传送带、热轧钢板等运动物体测速的主要手段，为了改善测量精度和响应速度，提出系统传递相关分析测速技术。采用计算发射端和接收端之间两路信号的系统传递函数进行相关性分析的方法，进行了理论验证和实验分析，得到了相对误差小于0.1%的实验结果。结果表明，利用系统传递函数相关分析构建激光测速系统，代替解调电路，简化信号调理电路，可降低电路部分引起的不确定度；互功率谱函数法实现快速相关分析和频域求得系统传递函数，可提高系统响应速度；合理设置发射端间距，取样积分提高测量信噪比，降低环境引起的不确定度，测量不确定度小于0.2%。该研究对传送带速率的实时测量有一定指导意义。Abstract: Laser measurement was the main method for velocity measurement of the moving objects such as conveyor belt and hot rolled steel plate. In order to improve measurement accuracy and response speed, system transfer correlation analysis velocity measurement technology was proposed. System transfer function of two signals between transmitter and receiver was calculated. Theoretical verification and experimental analysis were carried out by correlation analysis. The results show that, relative error is less than 0.1%. Laser velocity measurement system is constructed by correlation analysis of system transfer function instead of demodulation circuit to simplify signal conditioning circuit and reduce the uncertainty caused by circuit part. Fast correlation analysis is realized by cross-power spectral function method and transfer function of the system is obtained in frequency domain to improve the response speed of the system. By reasonably setting the distance between transmitters, sampling integration improves the measurement signal-to-noise ratio and reduces environmental uncertainty. The uncertainty of measurement is less than 0.2%. This research has certain guiding significance for the real-time measurement of conveyor belt speed.
-
-
Table 1 Conveyor belt velocity data (before the enhancements)
number standard velocity/(m·s-1) measure velocity/(m·s-1) deviation/
(m·s-1)1 1.029 1.021 -0.008 2 2.015 1.999 -0.016 3 3.026 3.046 0.020 4 4.022 3.996 -0.026 5 4.986 5.010 0.024 
下载: 导出CSV
Table 2 Conveyor belt velocity data (after the enhancements)
number standard velocity/(m·s-1) measure velocity/(m·s-1) deviation/
(m·s-1)1 0.986 0.985 -0.001 2 2.073 2.069 -0.004 3 3.043 3.038 -0.005 4 3.999 4.006 0.007 5 4.995 4.006 0.011
下载: 导出CSV
-
[1] HU G Sh. Digital signal processing: Theory, algorithms and implementation[M]. Beijing: Tsinghua University Press, 2003: 33-38(in Chinese).
[2] PENG G. Speed measurement of automotive laser based on LabVIEW[J].Automation and Instrumentation, 2017, 32(10): 49-53(in Chin-ese). http://d.old.wanfangdata.com.cn/Periodical/zdhyyb201710011
[3] GAO J. Research on laser velocity measurement system based on correlation measurement technology[D].Dalian: Dalian University of Technology, 2008: 2-4(in Chinese).
[4] LIU X J, SONG Zh W, ZHANG W. Design and Implementation of the DSP-based real-time speeed measurement system by cross-correlation method[J].Information Technology and Network Security, 2011, 30(14): 90-92(in Chinese).
[5] YANG X L. The system for laser cross-correlation velocity measurement based on DSP[J].Times Agricultural Machinery, 2016, 43(1): 40-42(in Chinese). http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=hunnj201601024
[6] YANG M, CAI Ch G, LIU Zh H, et al. Research on the method of the triaxial primary vibration calibration using the heterodyne interfe-rometry[J]. Acta Metrologica Sinica, 2018, 39(2): 201-206(in Chinese).
[7] SHARPE J P. A phase-stepped grating technique for frequency shifting in laser Doppler velocimetry[J].Optics and Lasers in Engineering, 2007, 45(11): 1067-1070. DOI: 10.1016/j.optlaseng.2007.05.005
[8] WANG K N, LIU Y L, CHEN H B, et al. Line-width measurement of DFB laser based on frequency shift delay self-heterodyning method[J]. Laser Technology, 2018, 42(5): 633-637 (in Chinese). http://d.old.wanfangdata.com.cn/Periodical/jgjs201805010
[9] CASTELLINI P, MARTARELLI M, TOMASINI E P. Laser Doppler vibrometry: Development of advanced solutions answering to technology's needs[J]. Mechanical Systems & Signal Processing, 2006, 20(6): 1265-1285. https://www.sciencedirect.com/science/article/abs/pii/S0888327005002220
[10] JIA F X, DING Zh L, YUAN F. Design on high frequency amplitude modulation of laser diode[J]. Infrared and Laser Engineering, 2007, 37(11): 1174-1177(in Chinese). http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=jgyhw200711013
[11] SHEN X. Laser Doppler velocimetry and application[M]. Beijing: Tsinghua University Press, 2004: 21-32(in Chinese).
[12] DU Zh J, WANG H L. Study on measuring technology of vibration displacement based on optical-fiber acousto-optic modulation[J]. Laser Journal, 2015, 36(12): 85-87(in Chinese). http://d.old.wanfangdata.com.cn/Periodical/jgzz201512020
[13] LIU L F, KONG F Q, YAN X L, et al. Feature analysis in correlation filtering tracker algorithm[J].Computer Engineering, 2018, 44(12): 264-270(in Chinese). http://d.old.wanfangdata.com.cn/Periodical/jsjgc201812044
[14] FU W, ZHU Y, ZHANG P, et al. Laser heterodyne interference micro-crack signal demodulation algorithm based on wavelet transform[J]. Journal of Test and Measurement Technology, 2018, 32(5): 369-373 (in Chinese). http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=hbgxycsjsxb201805002
[15] CHEN L, LI X G, CHEN D R, et al. Research of laser velocimeter based on fractional fourier transform[J].Semiconductor Optoelectronics, 2016, 37(6): 886-889(in Chinese). http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=bdtgd201606027
[16] WANG Y D, YANG L Z, YANG Y Q. Temporal point spread functions measurement based on correlation of chaotic laser[J]. Laser & Optoelectronics Progress, 2018, 55(7): 71406(in Chinese). http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=jgygdzxjz201807043
[17] ZHAO H B, ZHANG D, YANG J K, et al. Application of wavelet layered method for laser Doppler velocimetry signal[J]. Laser Technology, 2019, 43(1): 103-108 (in Chinese). http://d.old.wanfangdata.com.cn/Periodical/jgjs201901021
[18] LI Y, YANG B J, TAN L, et al. The united detecting method of sampling integral and chaotic system for the weak periodic pulse signals[J]. Journal of Electronics & Information Technology, 2003, 25(12): 1653-1657(in Chinese). http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=dzkxxk200312012
[19] ZHOU Sh D, MA Zh L. Influence of optical path collimation on measurement of long baseline transmittance meter[J]. Journal of Applied Optics, 2016, 37(1): 87-90 (in Chinese) DOI: 10.5768/JAO201637.0103003
[20] NI Y C. Practical measurement of uncertainty evaluation[M]. Beijing: China Metrology Press, 2008: 68-77(in Chinese).
-
期刊类型引用(1)
1. 王俊璞，蔡萍. 相关测速虚拟仿真实验设计. 实验室研究与探索. 2023(02): 242-245 . 
百度学术
其他类型引用(2)
计量
- 文章访问数: 8
- HTML全文浏览量: 1
- PDF下载量: 0
- 被引次数: 3