Remote sensing detection device with multi-wavelength time division excitation for fluorescent substances in water and detection method of remote sensing detection device

Abstract

The invention provides a remote sensing detection device with multi-wavelength time division excitation for fluorescent substances in water, comprising a data processing system connected with a lasercontroller that is also connected with a multi-wavelength laser emission system. The multi-wavelength laser emission system emits laser of different wavelengths to a target on the sea, and fluorescentsubstances in sea water are excited to irradiate with fluorescence. The remote sensing detection device also comprises a telescope for receiving fluorescence, a light splitting system for chromatically dispersing an optical signal from the telescope into optical signals having sequentially arranged wavelengths, and an ICCD (intensified charge coupled device) camera for acquiring the optical signals formed by the light splitting system; the ICCD camera is connected with the data processing system. In conjunction with a laser detection process, the remote sensing detection device can make fulluse of fluorescence spectrum division and fusion analytical capacities of exciting light sources having different wavelengths, qualitative and quantitative analytical capacities are effectively enhanced, and the remote sensing detection device is particularly applicable to rapid measurement of the composition and contents of fluorescent substances in water.

Description

technical field [0001] The invention relates to the field of marine environment monitoring, in particular to a remote sensing detection device and detection method for multi-wavelength time-division excitation of fluorescent substances in water. Background technique [0002] Oil spills during oil extraction and transportation will cause water pollution, and the same increase in domestic and working wastewater discharged into oceans, rivers, and lakes will also lead to increasingly serious water pollution. Therefore, the current aquatic environment is affected. serious threat. [0003] Oil spills, chlorophyll, colored soluble organic matter (CDOM), phycoerythrin and other organic substances in water are sensitive to optics, and can be identified and quantitatively analyzed by laser-induced fluorescence (LIF) active detection technology. LIF remote sensing detection technology combines fluorescence spectroscopy technology and active radar detection technology. By actively emi...

AI Technical Summary

Problems solved by technology

Among them, laser fluorescence radar generally uses high-power large lasers, such as 355nm Nd:YAG lasers, 308nm XeCl excimer lasers, 337nm N 2 Molecular lasers, etc., make the system equipment complex and expensive

The cost of in-situ LIF detection equipment using semiconductor lasers as excitation light source is relatively low, the device is small in size and compact in structure, and can realize the portable detection of fluorescent substances in water. Sometimes it is necessary to sample and measure samples on site, and the measurement speed is limited, which is not conducive to rapid measurement of large areas

In the prior art, one or more excitation light sources are generally used. Due to the complex composition of fluorescent substances in water, one excitation wavelength is used as the excitation light source for analysis, which makes qualitative and quantitative analysis of fluorescence in water difficult.

Simultaneous excitation with multiple wavelengths of excitation light can solve the problem of spectral overlap to a certain extent, but data fusion processing is difficult

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