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COD photoelectric detection device

A photoelectric detection and photodetector technology, which is applied in the direction of color/spectral characteristic measurement, etc., can solve the problems affecting the stability and accuracy of detection, increasing the workload of detection personnel, and detecting zero-point drift, etc., and achieves simple structure and convenient maintenance. , Eliminate the effect of detection drift

Inactive Publication Date: 2007-02-14
陈明
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Problems solved by technology

In addition, the above-mentioned detection instruments are easily affected by the external environment such as temperature during detection, and there will be a problem of zero point drift during the detection process, which affects the stability and accuracy of the detection.
Due to the phenomenon that the zero point drift of the current photoelectric detection device is common, the zero point needs to be corrected before each detection, which increases the workload of the detection personnel, making it inconvenient to use, and the accuracy is not high.

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  • COD photoelectric detection device
  • COD photoelectric detection device

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Embodiment Construction

[0009] The present invention will be described in detail below in conjunction with accompanying drawing: figure 1 , figure 2 As shown, the utility model at least includes an emission light source 1, a photodetector 2, a measurement working optical path 3, a photocell 4, and a control circuit board 5, etc. The emitting light source 1 is composed of two light-emitting diodes emitting light paths of different wavelengths. After the two light-emitting diodes, a two-way light path detector composed of a photodetector 2, a measuring working light path 3, and a photocell 4 is respectively arranged and connected to the control Analyze the detection results on the circuit board 5 . Beam splitters 6 are respectively arranged in front of the two photodetectors 2 , and a reference compensation optical path 7 is led out to a reference detector 8 , and the feedback is connected to the control circuit board 5 .

[0010] Each detection wavelength of the detection device of the present inve...

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Abstract

A COD photoelectric detection device is prepared as forming the emitting light source by at least two LED emitting light paths with different wavelength, setting light path detector formed by photo detector and measurement operation light path as well as photocell behind two LED and connecting it to control circuit board to make analysis of detection result, setting beam splitter before two light detector separately and leading out reference compensation light path from each of two said detectors and connecting them to reference detector as well as connecting feedback to control circuit board.

Description

technical field [0001] The invention relates to a photoelectric detection device suitable for COD detection, which can be widely used in environmental protection, chemical analysis, medical instruments, drug analysis and other instrument analysis after replacing the light source according to the required detection items. Background technique [0002] The current COD photoelectric detection devices generally use single-wavelength detection, and the detection wavelength is generally 600-620nm. At present, for the colorimetric detection method, the current domestic and foreign products generally use 600-630nm to detect Cr 3+ . There are also a small number of manufacturers whose products use 380-420nm wavelength to detect Cr 6+ , to detect low concentrations of COD. In addition, the above-mentioned detection instrument is easily affected by the external environment such as temperature during detection, and there will be a problem of zero point drift during the detection proc...

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Application Information

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IPC IPC(8): G01N21/27
Inventor 林悦申高峰张政毓
Owner 陈明