Double-light-source water quality COD detection sensor with adjustable range

Abstract

The invention discloses a double-light-source water quality COD detection sensor with adjustable range. The sensor comprises a shell, a light source part, a light absorption chamber part and a photoelectric detection part. The light source part adopts double light sources and comprises irradiation light and reference light; a sample injection hole and a sample injection hole cover are arranged at the positions, corresponding to the light absorption chamber, of the shell, the light source part and the light absorption chamber part are separated through a transparent sliding partition plate, the light source is fixed to the transparent sliding partition plate, and the transparent sliding partition plate is controlled by a sliding partition plate controller; and the light absorption chamber part and the photoelectric detection part are separated by a transparent fixed partition plate. According to the invention, the optical path from the light source to the photoelectric detector is changed, so that the measuring range and the measuring precision are changed; the interference of turbidity, water color, temperature and other factors on the measuring result is reduced by adding reference light, the water temperature is detected in real time, and temperature compensation is carried out to improve the accuracy.

Description

technical field [0001] The invention relates to an optical detection sensor, in particular to an intelligent sensor for detecting COD parameters in water, and belongs to the technical field of water quality detection. Background technique [0002] In recent years, with the increasing pollution of water resources, people have begun to pay attention to the work of water quality testing. According to the technical requirements of water quality testing in my country, COD is one of the most important parameters to measure water quality. COD reflects the redox substances of water quality. degree of pollution. The commonly used detection methods of COD mainly include chemical method, electrochemical method, optical method and biological method. However, chemical methods, electrochemical methods, and biological methods generally consume reagents, easily cause secondary pollution, expensive detection instruments, and relatively high detection costs. Because the equipment based on th...

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Problems solved by technology

However, chemical methods, electrochemical methods, and biological methods generally consume reagents, which are likely to cause secondary pollution, expensive detection instruments, and relatively high detection costs.

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