A method and device for on-line monitoring of water quality

Abstract

The invention discloses a water quality on-line monitoring method and a water quality on-line monitoring device. The water quality on-line monitoring method comprises the following steps of: S1, in a detection model construction stage, obtaining a relation between the test paper color change and the detection index concentrations, and constructing a detection model; S2, in an information acquisition stage, dropping a sample onto a test paper layer, wherein the test paper layer displays different colors because of different detection index concentrations, and acquiring color change image information on line; S3, in a characteristic quantity stage, preprocessing acquired original data, then extracting characteristic quantities, and extracting image information of the test paper layer; and S4, in a detection and judgment stage, performing characteristic layer fusion processing on the extracted image information characteristic quantities, and performing on-line detection through the constructed on-line monitoring model. The water quality on-line monitoring method can measure the pollutant content of water quickly and accurately in real time and evaluate the quality of a water body; and furthermore, the detection device is light in structure, simple in operation and low in cost and has a direct practical significance for monitoring of the quality of the water body and guaranteeing of the sustainable development of agriculture.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a water quality online monitoring method and device. Background technique [0002] At present, the overall situation of water pollution in China is quite severe. According to an incomplete survey, 2,167,000 hm of arable land was polluted by sewage irrigation nationwide 2 . According to the 2008 Bulletin on the State of the Environment in China, surface water pollution is still serious across the country. The water quality of the seven major water systems is generally moderately polluted, the water quality of rivers in Zhejiang and Fujian is slightly polluted, and the problem of eutrophication in lakes (reservoirs) is prominent. Among the seven major river systems in the country, 24.2% of them have Grade V water quality, and 0.8% are inferior to Grade V water quality. According to another important survey released by the State Environmental Protection Administ...

AI Technical Summary

Problems solved by technology

However, the equipment is often bulky, the detection indicators are few or single, and the cost is expensive, which is not an ideal choice for agricultural production.

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