Water quality on-line monitoring method and device

A monitoring device and water quality technology, which is applied in the direction of color/spectral characteristic measurement, etc., can solve the problems of bulky equipment, few detection indicators, and high cost, and achieve the effect of overcoming high price, rapid response, and low cost

Active Publication Date: 2013-10-02
SOUTH CHINA AGRI UNIV
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Problems solved by technology

However, the equipment is often bulky, the detection indicators are few or single,

Method used

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  • Water quality on-line monitoring method and device
  • Water quality on-line monitoring method and device
  • Water quality on-line monitoring method and device

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[0048] Example

[0049] The water quality online monitoring method in this embodiment uses pH test paper, hexavalent chromium test paper, chloride test paper, sulfide test paper and total phosphorus test paper, and realizes five indicators of water quality through five test papers (based on "China Farmland Irrigation Water Standards" (GB5084- 2005)) detection. In this embodiment, more test papers can be set to detect the water quality indicators, and five of them are selected for implementation in this embodiment.

[0050] like figure 1 As shown, the technical solution of this embodiment includes the following steps:

[0051] In the model testing stage, the specific implementation process is as follows: figure 1As indicated by the arrow in the middle and upper part, first take a batch of water samples for farmland irrigation and apply them on the test paper. Concentrations of pollutants in irrigation water were then measured. Then compare and analyze the concentration of ...

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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...

Claims

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Application Information

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IPC IPC(8): G01N21/25
Inventor 臧英曹晓曼周志艳李小敏曾庆猛陈雄飞张明华郑乐张龙林潮兴
Owner SOUTH CHINA AGRI UNIV
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