A water quality monitoring method, instrument and system based on multi-wavelength absorbance

Abstract

The invention discloses a water quality monitoring method, instrument and system based on multi-wavelength absorbance. The method includes irradiating the water body with visible light of at least two wavelengths; receiving the absorbance data in the visible band generated through the water body; and simulating the absorbance data in the visible band. combined to obtain the compensated absorbance data corresponding to the window pollution and water turbidity in the ultraviolet band; use the preset ultraviolet band light to irradiate the water body, and receive the measured absorbance data in the ultraviolet band; subtract the compensated absorbance data from the measured absorbance data in the ultraviolet band to obtain The real absorbance data in the ultraviolet band; the water quality parameters of the water body are calculated according to the real absorbance data; and the water quality parameters are transmitted to the water quality monitoring terminal in a wireless manner. The above method, instrument and system can eliminate the influence of window pollution and water turbidity, reflect the status of water pollution online in real time, are accurate, efficient and environmentally friendly, can reduce the overall volume of the instrument, and reduce manufacturing costs.

Description

technical field [0001] The invention belongs to the technical field of water quality monitoring, in particular to a water quality monitoring method, instrument and system based on multi-wavelength absorbance. Background technique [0002] Water quality monitoring is a necessary means to prevent and control water body pollution. However, most traditional water quality monitoring technologies use off-line laboratory chemical analysis methods. Although the measurement results are accurate, the labor intensity is relatively large, the test cycle is relatively long, and the operation is relatively complicated. There will be secondary pollution. [0003] In recent years, a water quality monitoring method based on UV-Vis spectroscopy has emerged in the field of water quality monitoring. Because it does not produce secondary pollution, has high information potential, fast detection speed, and easy operation, it has been more and more widely used. , the main principle of this method...

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Problems solved by technology

However, this method also has problems such as poor flexibility and greater influence by window pollution, and due to high manufacturing costs, it has not been possible to build a widely distributed node-type water quality monitoring system so far.

Most of the existing water quality monitoring systems in my country are complex in design, the number of automatic monitoring stations is relatively small and the flexibility is relatively poor, and the mobile monitoring equipment mainly based on monitoring ships and monitoring vehicles has the disadvantages of large size, high cost and difficulty in wide-scale promotion , In addition, this existing technology is often applied to single or small-scale water quality monitoring systems, so the data integration efficiency is low, and it is impossible to effectively predict the development trend of water quality

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