Underwater spectrum detection device and method

Abstract

The invention relates to a device and method capable of realizing in-situ, real-time and high-sensitivity spectrum detection of element types and concentration in water. The device is composed of an underwater laser-induced breakdown spectrum module packaged in a sealed cabin (8) and a micro-gas-column auxiliary module placed outside the sealed cabin (8), wherein the laser-induced breakdown spectrum module comprises a pulse laser (1), a focusing and collecting light path, an optical fiber (7), a spectrograph (2), a control circuit board (3) and the like; and the micro-air-column auxiliary module is mainly composed of a peristaltic pump, a buffer cabin (9), a needle head and the like. When the device works, a columnar air flow which is small in diameter and stable in shape is generated in awater body through the micro-air-column auxiliary module, then the sample form when laser pulses break through a water body sample is changed, and the purposes of enhancing LIBS spectral signals andachieving in-situ and high-sensitivity detection of elements in water are achieved. Therefore, according to the method and the device, the sensitivity of spectrum detection can be improved through themicro-gas-column auxiliary module which is small in size, low in energy consumption and convenient to mount and dismount, and the method and the device are suitable for the fields of related water environment detection or scientific investigation and the like.

Description

technical field [0001] The patent of the invention relates to an underwater in-situ, real-time element composition spectrum detection and analysis technology, which belongs to the field of optical instruments and is expected to be applied in the fields of water environment monitoring and natural water scientific investigation. Background technique [0002] With the continuous improvement of human attention to water environmental pollution and the continuous deepening of research in related fields such as marine science, people have found that the development of underwater in-situ and real-time detection and analysis of elemental components in water is of great importance to water environmental protection and It plays a very important and positive role in fields such as scientific investigation of natural water bodies. Laser-induced breakdown spectroscopy (LIBS) is a method that uses high-energy laser pulses to break down samples to generate high-temperature plasma, and condu...

AI Technical Summary

Problems solved by technology

However, affected by factors such as water body pressure environment and high thermal conductivity, the spectral signal intensity and stability of this technology are poor

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