A Laser Triangulation Displacement Sensor Based on a Cylindrical Annular Reflector
The ellipticity of the spot caused by laser jitter has a significant effect on the measurement accuracy of the traditional laser triangulation method. In order to overcome the influence of laser characteristics on measurement and improve the accuracy of displacement measurement, this paper proposes...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-10-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/10/10/1139 |
| _version_ | 1797572553822175232 |
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| author | Jiaqi Li Wei Tao Hui Zhao |
| author_facet | Jiaqi Li Wei Tao Hui Zhao |
| author_sort | Jiaqi Li |
| collection | DOAJ |
| description | The ellipticity of the spot caused by laser jitter has a significant effect on the measurement accuracy of the traditional laser triangulation method. In order to overcome the influence of laser characteristics on measurement and improve the accuracy of displacement measurement, this paper proposes a measurement model for a laser displacement sensor based on a cylindrical annular reflector. A physical prototype is designed through parameter optimization using NSGA-II, and a two-step detection algorithm is proposed for the imaging ring of the prototype. The algorithm performs contour thinning after rough positioning of the imaging annular ring, and then performs precise detection. Through physical experiments, it is verified that the repeatability error of this method can reach below 0.02%, and the accuracy is significantly improved compared to traditional laser triangulation displacement sensors. Meanwhile, the measurement results of displacement show linearity. The optical path design of this sensor is simpler than the previously proposed rotational symmetrical laser triangulation displacement sensor, which has good application prospects. |
| first_indexed | 2024-03-10T20:57:24Z |
| format | Article |
| id | doaj.art-37159e75315248ce8b734aaecd779c5d |
| institution | Directory Open Access Journal |
| issn | 2304-6732 |
| language | English |
| last_indexed | 2024-03-10T20:57:24Z |
| publishDate | 2023-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj.art-37159e75315248ce8b734aaecd779c5d2023-11-19T17:47:34ZengMDPI AGPhotonics2304-67322023-10-011010113910.3390/photonics10101139A Laser Triangulation Displacement Sensor Based on a Cylindrical Annular ReflectorJiaqi Li0Wei Tao1Hui Zhao2School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaSchool of Sensing Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaSchool of Sensing Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaThe ellipticity of the spot caused by laser jitter has a significant effect on the measurement accuracy of the traditional laser triangulation method. In order to overcome the influence of laser characteristics on measurement and improve the accuracy of displacement measurement, this paper proposes a measurement model for a laser displacement sensor based on a cylindrical annular reflector. A physical prototype is designed through parameter optimization using NSGA-II, and a two-step detection algorithm is proposed for the imaging ring of the prototype. The algorithm performs contour thinning after rough positioning of the imaging annular ring, and then performs precise detection. Through physical experiments, it is verified that the repeatability error of this method can reach below 0.02%, and the accuracy is significantly improved compared to traditional laser triangulation displacement sensors. Meanwhile, the measurement results of displacement show linearity. The optical path design of this sensor is simpler than the previously proposed rotational symmetrical laser triangulation displacement sensor, which has good application prospects.https://www.mdpi.com/2304-6732/10/10/1139rotational symmetrical laser triangulation displacement sensorannular reflection mirrorparameter optimizationcircle fitting algorithm |
| spellingShingle | Jiaqi Li Wei Tao Hui Zhao A Laser Triangulation Displacement Sensor Based on a Cylindrical Annular Reflector Photonics rotational symmetrical laser triangulation displacement sensor annular reflection mirror parameter optimization circle fitting algorithm |
| title | A Laser Triangulation Displacement Sensor Based on a Cylindrical Annular Reflector |
| title_full | A Laser Triangulation Displacement Sensor Based on a Cylindrical Annular Reflector |
| title_fullStr | A Laser Triangulation Displacement Sensor Based on a Cylindrical Annular Reflector |
| title_full_unstemmed | A Laser Triangulation Displacement Sensor Based on a Cylindrical Annular Reflector |
| title_short | A Laser Triangulation Displacement Sensor Based on a Cylindrical Annular Reflector |
| title_sort | laser triangulation displacement sensor based on a cylindrical annular reflector |
| topic | rotational symmetrical laser triangulation displacement sensor annular reflection mirror parameter optimization circle fitting algorithm |
| url | https://www.mdpi.com/2304-6732/10/10/1139 |
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