LIBS underwater precision positioning system

Shuang Xu; Kai Cheng; Jun Liu

doi:10.1117/12.2537968

19 November 2019 LIBS underwater precision positioning system

Shuang Xu, Kai Cheng, Jun Liu

Proceedings Volume 11184, Optoelectronic Devices and Integration VIII; 1118415 (2019) https://doi.org/10.1117/12.2537968
Event: SPIE/COS Photonics Asia, 2019, Hangzhou, China

Abstract

Laser induced breakdown spectroscopy (LIBS) is a type of atomic emission spectroscopy which uses a highly energetic laser pulse as the excitation source. The laser is focused to form a plasma, which atomizes and excites samples. The formation of the plasma only begins when the focused laser achieves a certain threshold for optical breakdown, which generally depends on the environment and the target material. Thereby, the detection and spectral analysis of the elements contained in the object are realized. However, the traditional LIBS system cannot achieve non-contact adjustment. When detecting objects underwater, the optical path is fixed and cannot be re-adjusted to accommodate the external environment. In this paper, the optical path system is integrated into the pressure cabin and controlled by a microcontroller unit. The host computer is connected to the microcontroller unit through the TCP/IP protocol. Then the focus of the optical path and the brightness of the illumination source can be adjusted by the PC through the host computer. An underwater HD camera is controlled by the host computer to realize in-situ detection and monitoring of the elements contained in the underwater object. Compared with the traditional LIBS system, the advantage of this system is that the underwater non-contact optical system can be adjusted and focused by the host computer. At the same time, the underwater object can be monitored by the high-definition camera to realize the in-situ detection and monitoring of the elements contained in the underwater object, so as to achieve accurate underwater positioning.

Citation Download Citation

Shuang Xu, Kai Cheng, and Jun Liu "LIBS underwater precision positioning system", Proc. SPIE 11184, Optoelectronic Devices and Integration VIII, 1118415 (19 November 2019); https://doi.org/10.1117/12.2537968

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