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Water quality online monitoring device based on light-emitting diodes

A technology of light-emitting diodes and monitoring devices, which is applied in measurement devices, color/spectral characteristic measurement, and material analysis by optical means, etc. Accuracy and reliability, broaden the effective range, improve the effect of service life

Active Publication Date: 2021-01-29
成都清能华创科技合伙企业(有限合伙)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most traditional monitoring methods use reagent titration, which requires offline measurement after sampling, which cannot meet the needs of online real-time monitoring
In recent years, the method of using ultraviolet light absorption to monitor water organic pollution has gradually matured. Some water quality monitoring devices based on ultraviolet light absorption have also appeared abroad, but these existing monitoring devices basically use xenon lamps or mercury lamps as light sources, which are stable. Working life is very limited
There are also a few research and development technologies that use LED (light-emitting diode) as the light source, but the power of the LED light source is greatly affected by temperature and decays with the increase of service time, which directly affects the accuracy and reliability of the monitoring device.
In addition, the effective range of a single monitoring device is usually relatively limited, and it is difficult to adapt to the measurement environment with large changes in pollution conditions

Method used

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  • Water quality online monitoring device based on light-emitting diodes
  • Water quality online monitoring device based on light-emitting diodes
  • Water quality online monitoring device based on light-emitting diodes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] like figure 2 As shown, the water quality online monitoring device based on light-emitting diodes in this embodiment includes a transmitter sleeve 1, a receiver sleeve 2, a gap block 3, several LED light source transmitters 4, a light-incoming quartz window 5, and a light-emitting quartz window 6 , controller 7 and the quartz right-angle prism 8 (the quartz right-angle prism of the present embodiment only has the function of reflected light signal) identical with LED light source transmitter 4 quantity, transmitted light receiver 9 and reference light receiver 10; Transmitter cover An LED light source transmitter 4 , a controller 7 and a reference light receiver 10 are arranged in the barrel 1 , and a transmitted light receiver 9 is arranged in the receiver sleeve 2 .

[0022] Both the transmitter sleeve 1 and the receiver sleeve 2 are closed sleeve structures, the transmitter sleeve 1 and the receiver sleeve 2 are arranged in parallel and spaced apart, and the transmi...

Embodiment 2

[0029] The gap through which the transmitted light passes is the absorption optical path, and the width of the gap determines the effective range of the monitoring device, so it should be designed according to the specific conditions of the monitored water body. In particular, for the situation where the content of organic matter varies in a large range, the form of stepped gaps can be used. like image 3 As shown, the structure of this embodiment is basically the same as that of Embodiment 1. The difference is that this embodiment adopts a stepped gap, that is, the inner lower parts of the transmitter sleeve 1 and the receiver sleeve 2 of this embodiment are concave inward. , so that the gap between the transmitter sleeve 1 and the receiver sleeve 2 becomes a trapezoidal gap with a narrow top and a wide bottom, and two absorption optical paths with different optical paths are arranged in one monitoring device. When the organic content is low, the signal of the long optical p...

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Abstract

The invention relates to an on-line water quality monitoring device based on light-emitting diodes, which is characterized in that the on-line monitoring optical path includes several groups of LED light source transmitters, controllers, reference light receivers with the same number as the LED light source transmitters, light splitting and returning devices, and Transmitted light receiver; part or all of the light emitted by each LED light source transmitter is sent to the corresponding light splitting and returning device, and a part of the light emitted by the corresponding light splitting and returning device or the LED light source transmitter is sent to the signal medium to be tested, and passes through the medium to be tested The optical signal is detected and received by the corresponding transmitted optical receiver, and the absorption of the medium to be measured for light of a specific wavelength is obtained through the transmitted optical signal. The optical signal obtains the power change of the corresponding LED light source transmitter, and the controller is electrically connected to the reference light receiver and the transmitted light receiver, and adjusts the optical power of the corresponding LED light source transmitter according to the received signal.

Description

technical field [0001] The invention relates to a water quality online monitoring device, in particular to a device for monitoring chemical oxygen demand (Chemical oxygen demand, COD), biochemical oxygen demand (Biochemical oxygen demand, BOD), total organic The invention relates to a light-emitting diode-based multi-parameter wide-range water quality online monitoring device for parameters such as carbon (Total organic carbon, TOC) and turbidity, and relates to the technical fields of water environment monitoring and sewage treatment. Background technique [0002] Water quality online monitoring is of great significance for water environment protection and governance. Water pollution in my country is dominated by organic pollution. Therefore, the monitoring of various parameters (such as COD, BOD, TOC, etc.) related to organic pollution is very important. [0003] Most traditional monitoring methods use reagent titration, which requires offline measurement after sampling,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/01G01N21/31
CPCG01N21/01G01N21/3103
Inventor 冯小楠张士和钟文国任翊华
Owner 成都清能华创科技合伙企业(有限合伙)