Underwater laser Raman spectrum/laser-induced breakdown spectroscopy combined detection device and method

Abstract

The invention relates to an underwater spectrographic detection device combining a laser raman spectrum with a laser induced breakdown spectrum. The device comprises a raman host chamber with a window and an LIBS external hanging chamber which has a window and is connected by cables and an LIBS signal transmission front-end fiber (5), and can realize detection of underwater cation and anion at the same time. The raman host chamber is equipped with a continuous laser, a front optical circuit, a spectrograph, a detector and a power supply/control communication module which are connected by the cables and an ROV deck. The LIBS external hanging chamber is internally equipped with a double impulse laser and a front optical circuit, LIBS signals enter the spectrograph through the LIBS signal transmission front-end fiber (5), a coupling device and a fiber (7), the raman signals enter the spectrograph through the raman signal transmission fiber, and multi-spectrum joint detection or single spectrum detection is realized by a set sequential control. The joint detection device has small volume and low power consumption, can be used for different marine environment measurements in submersibles, and provides a detection way capable of acquiring overall information for marine chemical detection.

Description

Technical field: [0001] The patent of the present invention relates to a technology for marine chemical detection by means of laser spectroscopy, which belongs to the technical field of marine technology and optical instruments. Background technique: [0002] At present, most marine chemical detection needs to collect samples and send them back to the laboratory on the water for analysis, and there is a lack of chemical sensors for underwater on-site detection. Most of the on-site detection sensors are aimed at the physical environment parameters of the ocean. The real-time and in-situ analysis of oceanographic components basically relies on the development of sensors for specific components, and there is a lack of chemical analysis and testing methods for multiple environments and multiple components. . In recent years, some laser spectroscopy marine chemical detection technologies have been developed, such as Raman spectroscopy, laser-induced breakdown spectroscopy, etc.,...

AI Technical Summary

Problems solved by technology

In recent years, some laser spectroscopy marine chemical detection technologies have been developed, such as Raman spectroscopy, laser-induced breakdown spectroscopy, etc., but these technologies are not comprehensive enough to detect substances. For example, Raman spectroscopy usually detects anions in water, and laser-induced breakdown spectroscopy detects anions in water. cations, there is a great need for a technical means that can simultaneously detect anions and cations

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