Real-Time Laser Interference Detection of Mechanical Targets Using a 4R Manipulator
In this study, a laser interferometric sensing measurement (ISM) system based on a 4R manipulator system is developed to achieve detection of mechanical targets, which aims to realize the real-time, online detection of workpieces with high precision during processing. The 4R mobile manipulator (MM)...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-03-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/23/5/2794 |
| _version_ | 1797614322379128832 |
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| author | Tingrui Liu Zhongwei Ji Yan Ding Youfeng Zhu |
| author_facet | Tingrui Liu Zhongwei Ji Yan Ding Youfeng Zhu |
| author_sort | Tingrui Liu |
| collection | DOAJ |
| description | In this study, a laser interferometric sensing measurement (ISM) system based on a 4R manipulator system is developed to achieve detection of mechanical targets, which aims to realize the real-time, online detection of workpieces with high precision during processing. The 4R mobile manipulator (MM) system is flexible and can move in the workshop, aiming to preliminarily track the position of the workpiece to be measured and locate it at millimeter level. The reference plane of the ISM system is driven by piezoelectric ceramics with the spatial carrier frequency realized and the interferogram obtained by a charge coupled device (CCD) image sensor. The subsequent processing of the interferogram includes fast Fourier transform (FFT), spectrum filtering, phase demodulation, tilt elimination for wave-surface, etc., so as to further restore the surface shape of the measured surface and obtain the surface quality indexes. A novel cosine banded cylindrical (CBC) filter is used to improve the FFT processing accuracy, and a bidirectional extrapolation and interpolation (BEI) technique is proposed for the preprocessing operation of real-time interferograms before FFT processing. Compared with the results from a ZYGO interferometer, the real-time online detection results show the reliability and practicability of this design. The relative error of peak–valley value reflecting the processing accuracy can reach about 0.63%, with the root-mean-square value reaching about 1.36%. Some possible applications of this work include the surface of mechanical parts in the process of online machining, the end face of shaft-like structures, annular surfaces, etc. |
| first_indexed | 2024-03-11T07:09:48Z |
| format | Article |
| id | doaj.art-b830b0b9145f482d82d722ff984fc0c7 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-11T07:09:48Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-b830b0b9145f482d82d722ff984fc0c72023-11-17T08:39:48ZengMDPI AGSensors1424-82202023-03-01235279410.3390/s23052794Real-Time Laser Interference Detection of Mechanical Targets Using a 4R ManipulatorTingrui Liu0Zhongwei Ji1Yan Ding2Youfeng Zhu3College of Mechanical and Electronic Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege of Mechanical and Electronic Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege of Mechanical and Electronic Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege of Mechanical and Electronic Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaIn this study, a laser interferometric sensing measurement (ISM) system based on a 4R manipulator system is developed to achieve detection of mechanical targets, which aims to realize the real-time, online detection of workpieces with high precision during processing. The 4R mobile manipulator (MM) system is flexible and can move in the workshop, aiming to preliminarily track the position of the workpiece to be measured and locate it at millimeter level. The reference plane of the ISM system is driven by piezoelectric ceramics with the spatial carrier frequency realized and the interferogram obtained by a charge coupled device (CCD) image sensor. The subsequent processing of the interferogram includes fast Fourier transform (FFT), spectrum filtering, phase demodulation, tilt elimination for wave-surface, etc., so as to further restore the surface shape of the measured surface and obtain the surface quality indexes. A novel cosine banded cylindrical (CBC) filter is used to improve the FFT processing accuracy, and a bidirectional extrapolation and interpolation (BEI) technique is proposed for the preprocessing operation of real-time interferograms before FFT processing. Compared with the results from a ZYGO interferometer, the real-time online detection results show the reliability and practicability of this design. The relative error of peak–valley value reflecting the processing accuracy can reach about 0.63%, with the root-mean-square value reaching about 1.36%. Some possible applications of this work include the surface of mechanical parts in the process of online machining, the end face of shaft-like structures, annular surfaces, etc.https://www.mdpi.com/1424-8220/23/5/2794mobile manipulatorinterferometric sensing measurementinterferogramspatial carrierFourier transformspectrum filtering |
| spellingShingle | Tingrui Liu Zhongwei Ji Yan Ding Youfeng Zhu Real-Time Laser Interference Detection of Mechanical Targets Using a 4R Manipulator Sensors mobile manipulator interferometric sensing measurement interferogram spatial carrier Fourier transform spectrum filtering |
| title | Real-Time Laser Interference Detection of Mechanical Targets Using a 4R Manipulator |
| title_full | Real-Time Laser Interference Detection of Mechanical Targets Using a 4R Manipulator |
| title_fullStr | Real-Time Laser Interference Detection of Mechanical Targets Using a 4R Manipulator |
| title_full_unstemmed | Real-Time Laser Interference Detection of Mechanical Targets Using a 4R Manipulator |
| title_short | Real-Time Laser Interference Detection of Mechanical Targets Using a 4R Manipulator |
| title_sort | real time laser interference detection of mechanical targets using a 4r manipulator |
| topic | mobile manipulator interferometric sensing measurement interferogram spatial carrier Fourier transform spectrum filtering |
| url | https://www.mdpi.com/1424-8220/23/5/2794 |
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