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On-line detection method and device for chlorophyll concentration in water body based on two detectors

A technology of chlorophyll concentration and dual detectors, which is applied in the field of chlorophyll concentration monitoring devices based on fluorescence detection, and can solve problems such as concentration c fluctuations and fluctuations

Active Publication Date: 2013-02-13
CHINA AGRI UNIV
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Problems solved by technology

[0011] (1) The incident light intensity fluctuates, the prerequisite of the Lambert-Beer law is that the incident light is required to be a stable monochromatic parallel light, if the I in the formula (2) O Fluctuation occurs, which will inevitably cause I f fluctuations, resulting in fluctuations in the concentration c

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  • On-line detection method and device for chlorophyll concentration in water body based on two detectors
  • On-line detection method and device for chlorophyll concentration in water body based on two detectors
  • On-line detection method and device for chlorophyll concentration in water body based on two detectors

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[0037] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0038] A fast, in-situ water body chlorophyll measurement device in this embodiment mainly includes: excitation light unit 100, receiving fluorescence unit 200, signal processing unit 300, window cleaning device 400, waterproof airtight cavity 500, ambient light shield 600, etc. . The excitation light unit 100 is located in the waterproof airtight cavity 500, and mainly includes: a monochrome ultra-brightness diode 101, a narrow-band emission filter 102, a collimator lens 103, and an emission window 104. The ultra-brightness diode 101 is a wavelength 430nm ultra-bright blue light diode, the central wavelength of the narrow-band emission filter 102 is 430nm, and the half-p...

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Abstract

The invention relates to a detection method and an in-situ detection device based on fluorescence intensity ratio of two detectors. The detection method comprises the following steps that: a light-exciting unit emits parallel light beams with certain wavelengths, and two photoelectric detectors positioned in the direction vertical to the parallel light beams and having an interval of d are used for detecting fluorescence signals; and based on the Lambert-Beer law, a proportional relation model between strength ratio of the two paths of fluorescence signals and the chlorophyll concentration in the water body is established. The detection device further comprises a signal processing unit, a window cleaning unit, a waterproof airtight cavity, an environmental protection cover unit and the like. With the adoption of the detection method and device, the influences caused by fluctuation of incident light, temperature variation, light scattering, pollution of a detection window and the like can be reduced, and the linear range of detection is expanded.

Description

technical field [0001] The invention relates to an online detection technology for the concentration of fluorescent pigments in water bodies, in particular to a device and method for monitoring chlorophyll concentration based on fluorescence detection. Background technique [0002] At present, the water pollution of oceans, lakes, rivers, reservoirs and other waters around the world is becoming more and more serious. Water quality monitoring, especially real-time in-situ monitoring of water quality, has attracted more and more attention. Real-time monitoring can grasp the dynamics of water quality changes, predict water quality changes, and prevent large-scale pollution in a timely manner. Especially when a certain type of algae in the water body proliferates, algal blooms and red tides will occur. Therefore, real-time online monitoring of phytoplankton can be targeted. Prevent and warn the large-scale occurrence of algal blooms and red tides. [0003] Different algae in na...

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Application Information

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IPC IPC(8): G01N21/64
Inventor 李道亮曾立华位耀光王聪陈英义
Owner CHINA AGRI UNIV
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