Design and Calibration of Two-Dimensional Scanning Sensor for Static Clearance Measurement of High-Speed Train

Gang Lu; Changjie Liu; Chunmin Shi; Xinlin Jia

doi:10.3788/LOP57.051204

Laser & Optoelectronics Progress, Volume. 57, Issue 5, 051204(2020)

Design and Calibration of Two-Dimensional Scanning Sensor for Static Clearance Measurement of High-Speed Train

Gang Lu^1、*, Changjie Liu¹, Chunmin Shi², and Xinlin Jia¹

Author Affiliations

¹State Key Laboratory of Precision Measuring Technology & Instruments, Tianjin University, Tianjin 300072, China;

²Vehicle Inspection Station, China Railway Test & Certification Center Co. Ltd., Beijing 100015, China;

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Figures & Tables(8)

Fig. 1. Design diagram of overall system

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Fig. 2. Picture of sensor design.(a) Physical picture of sensor; (b) schematic of scanning process

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Fig. 3. Picture of system calibration experiment. (a) System calibration experimental device; (b) sketch map of calibration experiment

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Fig. 4. Experimental device and measurement data. (a) Device of accuracy verification experiment; (b) point cloud of gauge block

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Table 1. Data of calibration experiment after filtering
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Table 1. Data of calibration experiment after filtering
α/(°) l/mm
0 479.012
5 466.836
10 459.813
15 457.197
20 458.516
25 464.185
30 474.299
35 489.330
40 509.724

Table 2. Data of calibration accuracy verification

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Table 2. Data of calibration accuracy verification

α/(°)	Two-dimensionalcoordinate (X, Y)	Distance ofpoint to line /mm
0	(576.15, -0.25)	0
5	(561.55, 48.61)	0.65
10	(547.73, 96.98)	0.70
15	(534.51, 143.24)	0.75
20	(522.71, 189.82)	0.66
25	(508.83, 238.00)	0.51
30	(495.00, 286.90)	0.60
35	(480.55, 337.87)	0.66
40	(465.05, 389.88)	0

Table 3. Data of accuracy verification experiment
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Table 3. Data of accuracy verification experiment
Line label Spacing ofline /mm Height differenceof gauge block /mm
AB-CD 10 10.8
CD-EF 10 9.1
EF-GH 20 20.6
GH-IJ 10 9.5

Table 4. Data of repeatability accuracy verification experiment
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Table 4. Data of repeatability accuracy verification experiment
Serial number X /mm Y /mm
1 416.073 7.262
2 415.673 7.255
3 415.863 7.489
4 415.987 7.065
5 416.106 7.598
6 415.995 7.336
7 415.789 7.258
8 415.857 7.154
9 416.033 7.218
10 415.778 7.369

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Gang Lu, Changjie Liu, Chunmin Shi, Xinlin Jia. Design and Calibration of Two-Dimensional Scanning Sensor for Static Clearance Measurement of High-Speed Train[J]. Laser & Optoelectronics Progress, 2020, 57(5): 051204

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