Hyperspectral water absorption and attenuation measuring device and method based on buoy

Abstract

The invention discloses a hyperspectral water absorption and attenuation measuring device and method based on a buoy. The hyperspectral water absorption and attenuation measuring device comprises a hyperspectral water absorption and attenuation measuring instrument, a water inlet of the hyperspectral water absorption and attenuation measuring instrument is connected with a four-way pipe through afirst pipeline, the four-way pipe is connected with a submersible pump through a second pipeline, the second pipeline is provided with a first three-way valve, the first three-way valve is connected with a first three-way pipe, a seawater filter is connected between the first three-way pipe and the four-way pipe, and another outlet of the first three-way pipe is connected with a first electromagnetic valve; a water outlet of the hyperspectral water absorption and attenuation measuring instrument is connected with a second three-way valve through a third pipeline, the second three-way valve isconnected with a second three-way pipe, another outlet of the second three-way valve is connected with a second electromagnetic valve, the second three-way pipe is connected with the four-way pipe through a third electromagnetic valve, the second three-way pipe is connected with a vacuum pump through a fourth pipeline, and the vacuum pump is connected with a purified water storage tank and an airdryer. According to the hyperspectral water absorption and attenuation measuring device and method, the problem that the instrument cannot be used in seawater for a long term is solved, and the absorption and attenuation coefficients of a seawater water spectrum are monitored for a long term in in-situ and all-weather modes.

Description

technical field [0001] The invention relates to the technical field of marine monitoring equipment, in particular to a buoy-based hyperspectral water body absorption attenuation measurement device and method. Background technique [0002] The absorption and attenuation coefficient of the water spectrum is the attenuation rate of light per unit distance in each band in the water body, which comprehensively reflects the degree to which the light is affected by suspended particles, soluble organic matter and plankton in the water. It is an important inherent optical quantity of the water body and the transparency of the water body. , Suspended solids concentration and other factors are direct indicators. The absorption and attenuation coefficients are also the basic parameters of the semi-analytical model of water color remote sensing. Studying the spectral characteristics of water bodies in sea areas can provide basic data for remote sensing quantitative research. [0003] Th...

AI Technical Summary

Problems solved by technology

This method requires special ship voyages, requires a lot of preparation work for deployment and recovery, and takes a long time. The operating cost of going to sea is high, and the detection frequency is low. It is difficult to achieve long-term continuous measurement.

Therefore, the traditional AC-S measurement method cannot perform long-term in-situ online monitoring of seawater absorption and attenuation coefficients

[0004] For the cleaning and self-maintenance of the instrument, some people use ultraviolet, ultrasonic, and disinfectant methods to clean the probe of the instrument, but this method is suitable for small sensors that can be treated with ultraviolet, ultrasonic, and disinfectant as a whole. For AC-S This method is not suitable for large-scale instruments with sensors inside the cavity, and ultraviolet light and disinfectant will damage the optical sensitive components of the instrument to varying degrees; and the sensor is directly placed in the air to protect the sensor, although it does not need to be immersed in seawater However, in practical applications, due to the high humidity of the sea air, condensation will inevitably occur on the sensor probe, so the drying effect is still not ideal

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