Self-Mixing Laser Distance-Sensor Enhanced by Multiple Modulation Waveforms
Optical rangefinders based on Self-Mixing Interferometry are widely described in literature, but not yet on the market as commercial instruments. The main reason is that it is relatively easy to propose new elaboration techniques and get results in controlled conditions, while it is very difficult t...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-11-01
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| Series: | Sensors |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1424-8220/22/21/8456 |
| _version_ | 1797466432543391744 |
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| author | Federico Cavedo Parisa Esmaili Michele Norgia |
| author_facet | Federico Cavedo Parisa Esmaili Michele Norgia |
| author_sort | Federico Cavedo |
| collection | DOAJ |
| description | Optical rangefinders based on Self-Mixing Interferometry are widely described in literature, but not yet on the market as commercial instruments. The main reason is that it is relatively easy to propose new elaboration techniques and get results in controlled conditions, while it is very difficult to develop a reliable instrument. In this paper, we propose a laser distance sensor with improved reliability, realized through a wavelength modulation at a different frequency, able to decorrelate single measurement errors and obtain improvement by averages. A dedicated software is implemented to automatically calculate the modulation pre-emphasis, needed to linearize the wavelength modulation. Finally, data selection algorithms allow to overcome signal fading problems due to the speckle effect. A prototype demonstrates the approach with about 0.1 mm accuracy up to 2 m of distance at 200 measurements per second. |
| first_indexed | 2024-03-09T18:39:47Z |
| format | Article |
| id | doaj.art-14515360437e4caba5f296b00c0d2fac |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-09T18:39:47Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-14515360437e4caba5f296b00c0d2fac2023-11-24T06:48:23ZengMDPI AGSensors1424-82202022-11-012221845610.3390/s22218456Self-Mixing Laser Distance-Sensor Enhanced by Multiple Modulation WaveformsFederico Cavedo0Parisa Esmaili1Michele Norgia2Department of Electronics, Information and Bioengineering, Politecnico di Milano, 20133 Milan, ItalyDepartment of Electronics, Information and Bioengineering, Politecnico di Milano, 20133 Milan, ItalyDepartment of Electronics, Information and Bioengineering, Politecnico di Milano, 20133 Milan, ItalyOptical rangefinders based on Self-Mixing Interferometry are widely described in literature, but not yet on the market as commercial instruments. The main reason is that it is relatively easy to propose new elaboration techniques and get results in controlled conditions, while it is very difficult to develop a reliable instrument. In this paper, we propose a laser distance sensor with improved reliability, realized through a wavelength modulation at a different frequency, able to decorrelate single measurement errors and obtain improvement by averages. A dedicated software is implemented to automatically calculate the modulation pre-emphasis, needed to linearize the wavelength modulation. Finally, data selection algorithms allow to overcome signal fading problems due to the speckle effect. A prototype demonstrates the approach with about 0.1 mm accuracy up to 2 m of distance at 200 measurements per second.https://www.mdpi.com/1424-8220/22/21/8456optical rangefinderself-mixing interferometrylaser sensorsdistance measurement |
| spellingShingle | Federico Cavedo Parisa Esmaili Michele Norgia Self-Mixing Laser Distance-Sensor Enhanced by Multiple Modulation Waveforms Sensors optical rangefinder self-mixing interferometry laser sensors distance measurement |
| title | Self-Mixing Laser Distance-Sensor Enhanced by Multiple Modulation Waveforms |
| title_full | Self-Mixing Laser Distance-Sensor Enhanced by Multiple Modulation Waveforms |
| title_fullStr | Self-Mixing Laser Distance-Sensor Enhanced by Multiple Modulation Waveforms |
| title_full_unstemmed | Self-Mixing Laser Distance-Sensor Enhanced by Multiple Modulation Waveforms |
| title_short | Self-Mixing Laser Distance-Sensor Enhanced by Multiple Modulation Waveforms |
| title_sort | self mixing laser distance sensor enhanced by multiple modulation waveforms |
| topic | optical rangefinder self-mixing interferometry laser sensors distance measurement |
| url | https://www.mdpi.com/1424-8220/22/21/8456 |
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