Chinese Journal of Lasers, Volume. 47, Issue 9, 904003(2020)
Calibration of Laser Triangular Displacement Sensor Based on Nonlinear Fitting
Figures & Tables(11)
Fig. 1. Laser triangular displacement detection. (a) Measurement principle; (b) theoretical measurement curve
Fig. 7. Raw dataset. (a) Scatter of original data; (b) testing results of interferometer
Table 1. Comparison of calibration results under different times
View tableTable 1. Comparison of calibration results under different times
Serial number of the sensor Number of sampling k=2 mse ε /mm2 Maximum error μ /mm Precision σ /% Processing time τ /s 2.01×10-5 0.0118 0.70 0.49 No.1 205 1.96×10-5 0.0119 0.71 0.32 1.97×10-5 0.0118 0.70 0.32 No.2 211 2.37×10-5 0.0125 0.75 0.31 No.3 205 2.31×10-5 0.0117 0.71 0.35 Serial number of the sensor Number of sampling k=3 mse ε /mm2 Maximum error μ /mm Precision σ /% Processing time τ /s 2.18×10-5 0.0154 0.92 0.46 No.1 205 2.16×10-5 0.0155 0.92 0.35 2.16×10-5 0.0154 0.91 0.36 No.2 211 2.46×10-5 0.0165 0.98 0.42 No.3 205 2.27×10-5 0.0151 0.93 0.38 Serial number of the sensor Number of sampling k=4 mse ε /mm2 Maximum error μ /mm Precision σ /% Processing time τ /s 2.34×10-5 0.018 1.07 0.45 No.1 205 2.42×10-5 0.0181 1.08 0.48 2.38×10-5 0.0179 1.07 0.54 No.2 211 2.3×10-5 0.0197 1.17 0.46 No.3 205 2.3×10-5 0.0177 1.08 0.47 Serial number of the sensor Number of sampling k=5 mse ε /mm2 Maximum error μ /mm Precision σ /% Processing time τ /s 3.79×10-5 0.0211 1.26 0.61 No.1 205 3.75×10-5 0.0211 1.26 0.58 3.79×10-5 0.0211 1.25 0.63 No.2 211 2.55×10-5 0.0222 1.32 0.62 No.3 205 2.62×10-5 0.0196 1.20 0.59
Table 2. Comparison of calibration results of different node vector divisions
View tableTable 2. Comparison of calibration results of different node vector divisions
Item UBS QUBS NUBS mse ε /mm2 0.0034 2.29×10-5 2.37×10-5 Maximum error μ /mm 0.083 0.0136 0.0125 Precision σ /% 2.5% 0.81% 0.75% Processing time τ /s 0.79 0.42 0.35
Table 3. Comparison of experimental results of different data processing methods
View tableTable 3. Comparison of experimental results of different data processing methods
Item SVM BP WF IIR NUBS mse ε /mm2 1.44×10-4 3.26×10-5 5.57×10-4 2.59×10-4 2.37×10-5 Maximum error μ /mm 0.0249 0.0136 0.0355 0.0199 0.0125 Precision σ /% 1.50 0.81 2.10 1.20 0.75
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Cui Hao, Guo Rui, Li Xingqiang, Cong Rigang. Calibration of Laser Triangular Displacement Sensor Based on Nonlinear Fitting[J]. Chinese Journal of Lasers, 2020, 47(9): 904003
Paper Information
Category: Measurement and metrology
Received: Mar. 25, 2020
Accepted: --
Published Online: Sep. 16, 2020
The Author Email: Xingqiang Li (lixingqiang@sia.cn)
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