Photo-vibrational sensing of trace chemicals and explosives by long-distance differential laser Doppler vibrometer
Photoacoustic/photothermal spectroscopy is an established technique for trace detection of chemicals and explosives. Normally high-sensitive microphone or PZT sensor is used to detect the signal in photoacoustic cell. In recent years, laser Doppler vibrometer (LDV) is proposed to remote-sense photoa...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2019
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| Online Access: | https://hdl.handle.net/10356/106383 http://hdl.handle.net/10220/49597 |
| _version_ | 1811686438452854784 |
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| author | Fu, Yu Liu, Huan Hu, Qi Xie, Jiecheng |
| author2 | Fountain, Augustus W. |
| author_facet | Fountain, Augustus W. Fu, Yu Liu, Huan Hu, Qi Xie, Jiecheng |
| author_sort | Fu, Yu |
| collection | NTU |
| description | Photoacoustic/photothermal spectroscopy is an established technique for trace detection of chemicals and explosives. Normally high-sensitive microphone or PZT sensor is used to detect the signal in photoacoustic cell. In recent years, laser Doppler vibrometer (LDV) is proposed to remote-sense photoacoustic signal on various substrates. It is a highsensitivity sensor with a displacement resolution of <10pm. In this research, the photoacoustic effect of various chemicals and explosives is excited by a quantum cascade laser (QCL) at their absorbance peak. A home-developed differential LDV at 1550nm wavelength is applied to detect the vibration signal at 100m. A differential configuration is applied to minimize the environment factors, such as environment noise and vibration, air turbulence, etc. and increase the detection sensitivity. The photo-vibrational signal of chemicals and explosives on different substrates are detected. The results show the potential of the proposed technique on detection of trace chemicals and explosives at long standoff distance. |
| first_indexed | 2024-10-01T05:00:25Z |
| format | Journal Article |
| id | ntu-10356/106383 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:00:25Z |
| publishDate | 2019 |
| record_format | dspace |
| spelling | ntu-10356/1063832023-03-04T17:22:29Z Photo-vibrational sensing of trace chemicals and explosives by long-distance differential laser Doppler vibrometer Fu, Yu Liu, Huan Hu, Qi Xie, Jiecheng Fountain, Augustus W. Guicheteau, Jason A. School of Mechanical and Aerospace Engineering SPIE Defense + Security Temasek Laboratories Photoacoustic Trace Chemicals & Explosives Engineering::Mechanical engineering Photoacoustic/photothermal spectroscopy is an established technique for trace detection of chemicals and explosives. Normally high-sensitive microphone or PZT sensor is used to detect the signal in photoacoustic cell. In recent years, laser Doppler vibrometer (LDV) is proposed to remote-sense photoacoustic signal on various substrates. It is a highsensitivity sensor with a displacement resolution of <10pm. In this research, the photoacoustic effect of various chemicals and explosives is excited by a quantum cascade laser (QCL) at their absorbance peak. A home-developed differential LDV at 1550nm wavelength is applied to detect the vibration signal at 100m. A differential configuration is applied to minimize the environment factors, such as environment noise and vibration, air turbulence, etc. and increase the detection sensitivity. The photo-vibrational signal of chemicals and explosives on different substrates are detected. The results show the potential of the proposed technique on detection of trace chemicals and explosives at long standoff distance. Published version 2019-08-13T03:33:57Z 2019-12-06T22:10:20Z 2019-08-13T03:33:57Z 2019-12-06T22:10:20Z 2017 Journal Article Fu, Y., Liu, H., Hu, Q., & Xie, J. (2017). Photo-vibrational sensing of trace chemicals and explosives by long-distance differential laser Doppler vibrometer. Proceedings of SPIE - Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XVIII, 10183, 101830B-. doi:10.1117/12.2261783 0277-786X https://hdl.handle.net/10356/106383 http://hdl.handle.net/10220/49597 10.1117/12.2261783 en Proceedings of SPIE - Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XVIII © 2017 SPIE. All rights reserved. This paper was published in Proceedings of SPIE - Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XVIII and is made available with permission of SPIE. 6 p. application/pdf |
| spellingShingle | Photoacoustic Trace Chemicals & Explosives Engineering::Mechanical engineering Fu, Yu Liu, Huan Hu, Qi Xie, Jiecheng Photo-vibrational sensing of trace chemicals and explosives by long-distance differential laser Doppler vibrometer |
| title | Photo-vibrational sensing of trace chemicals and explosives by long-distance differential laser Doppler vibrometer |
| title_full | Photo-vibrational sensing of trace chemicals and explosives by long-distance differential laser Doppler vibrometer |
| title_fullStr | Photo-vibrational sensing of trace chemicals and explosives by long-distance differential laser Doppler vibrometer |
| title_full_unstemmed | Photo-vibrational sensing of trace chemicals and explosives by long-distance differential laser Doppler vibrometer |
| title_short | Photo-vibrational sensing of trace chemicals and explosives by long-distance differential laser Doppler vibrometer |
| title_sort | photo vibrational sensing of trace chemicals and explosives by long distance differential laser doppler vibrometer |
| topic | Photoacoustic Trace Chemicals & Explosives Engineering::Mechanical engineering |
| url | https://hdl.handle.net/10356/106383 http://hdl.handle.net/10220/49597 |
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