A Scheme for Enhancing Precision in 3-Dimensional Positioning for Non-Contact Measurement Systems Based on Laser Triangulation
Laser triangulation allows non-contact measurement in the third dimension. Due to the nonlinearities presented in camera and laser sensor, large range distances are quite difficult to measure with high precision. In order to enhance the precision and accuracy of large range measurement based on lase...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2018-02-01
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| Series: | Sensors |
| Subjects: | |
| Online Access: | http://www.mdpi.com/1424-8220/18/2/504 |
| _version_ | 1811303255926374400 |
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| author | Yassine Selami Wei Tao Qiang Gao Hongwei Yang Hui Zhao |
| author_facet | Yassine Selami Wei Tao Qiang Gao Hongwei Yang Hui Zhao |
| author_sort | Yassine Selami |
| collection | DOAJ |
| description | Laser triangulation allows non-contact measurement in the third dimension. Due to the nonlinearities presented in camera and laser sensor, large range distances are quite difficult to measure with high precision. In order to enhance the precision and accuracy of large range measurement based on laser triangulation, we propose a novel scheme composed of four laser emitters, curve fitting subpixel location algorithm for laser center detection, and the linear regression approach based on the Gaussian model for calibration. When an object performs a 100 mm displacement from a closer to a farther point, our system achieved a repeatability up to ±7 µm, an estimated standard deviation of fitting error within 0.0027 mm, an expanded uncertainty of repeatability within 0.13 mm, an average error variation of rotational plane within 0.15 degree and a nonlinearity error within ±0.04% in full scale. Compared to published results, our proposed method shows an enhancement in accuracy. The error is significantly reduced and maintains at the low level for large ranges, which makes this system applicable and suitable for industrial and indoor applications. |
| first_indexed | 2024-04-13T07:44:41Z |
| format | Article |
| id | doaj.art-4369855af21948f8bbe050770b003e86 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-13T07:44:41Z |
| publishDate | 2018-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-4369855af21948f8bbe050770b003e862022-12-22T02:55:44ZengMDPI AGSensors1424-82202018-02-0118250410.3390/s18020504s18020504A Scheme for Enhancing Precision in 3-Dimensional Positioning for Non-Contact Measurement Systems Based on Laser TriangulationYassine Selami0Wei Tao1Qiang Gao2Hongwei Yang3Hui Zhao4Department of Instrument and Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaDepartment of Instrument and Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaDepartment of Instrument and Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaDepartment of Instrument and Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaDepartment of Instrument and Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaLaser triangulation allows non-contact measurement in the third dimension. Due to the nonlinearities presented in camera and laser sensor, large range distances are quite difficult to measure with high precision. In order to enhance the precision and accuracy of large range measurement based on laser triangulation, we propose a novel scheme composed of four laser emitters, curve fitting subpixel location algorithm for laser center detection, and the linear regression approach based on the Gaussian model for calibration. When an object performs a 100 mm displacement from a closer to a farther point, our system achieved a repeatability up to ±7 µm, an estimated standard deviation of fitting error within 0.0027 mm, an expanded uncertainty of repeatability within 0.13 mm, an average error variation of rotational plane within 0.15 degree and a nonlinearity error within ±0.04% in full scale. Compared to published results, our proposed method shows an enhancement in accuracy. The error is significantly reduced and maintains at the low level for large ranges, which makes this system applicable and suitable for industrial and indoor applications.http://www.mdpi.com/1424-8220/18/2/504laser triangulationsubpixel locationcurve fittingcalibration |
| spellingShingle | Yassine Selami Wei Tao Qiang Gao Hongwei Yang Hui Zhao A Scheme for Enhancing Precision in 3-Dimensional Positioning for Non-Contact Measurement Systems Based on Laser Triangulation Sensors laser triangulation subpixel location curve fitting calibration |
| title | A Scheme for Enhancing Precision in 3-Dimensional Positioning for Non-Contact Measurement Systems Based on Laser Triangulation |
| title_full | A Scheme for Enhancing Precision in 3-Dimensional Positioning for Non-Contact Measurement Systems Based on Laser Triangulation |
| title_fullStr | A Scheme for Enhancing Precision in 3-Dimensional Positioning for Non-Contact Measurement Systems Based on Laser Triangulation |
| title_full_unstemmed | A Scheme for Enhancing Precision in 3-Dimensional Positioning for Non-Contact Measurement Systems Based on Laser Triangulation |
| title_short | A Scheme for Enhancing Precision in 3-Dimensional Positioning for Non-Contact Measurement Systems Based on Laser Triangulation |
| title_sort | scheme for enhancing precision in 3 dimensional positioning for non contact measurement systems based on laser triangulation |
| topic | laser triangulation subpixel location curve fitting calibration |
| url | http://www.mdpi.com/1424-8220/18/2/504 |
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