Dissolved oxygen calibration system

A calibration system and dissolved oxygen technology, applied in material inspection products, filtration separation, instruments, etc., can solve problems such as troublesome staff, time-consuming and laborious process, and calibration problems of ultra-low dissolved oxygen sensor by fluorescence method.

Active Publication Date: 2021-08-17
常州罗盘星检测科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The photochemical dissolved oxygen sensor based on the principle of fluorescence quenching has strong anti-interference ability, high measurement accuracy, good repeatability and stability, and is suitable for detecting and monitoring the concentration of dissolved oxygen in various water bodies. , at present, the fluorescence method ultra-low dissolved oxygen sensor is used more and more in semiconductor, boiler and other fields. On the fluorescent substance, the fluorescent substance is immediately excited by the blue light. When the excited substance returns to its original state, it will emit red light. This red light will be measured by the photodiode in the sensor. The time from being excited to returning to its original state after emitting red light, so that the content of dissolved oxygen in water can be measured. For the fluorescence method ultra-low dissolved oxygen sensor, although it has many advantages compared with the CLARK electrode method, the fluorescence method is ultra-low The calibration of the dissolved oxygen sensor in the effective range is a difficult problem in the industry, and there are currently no tools and equipment for the full range calibration of the fluorescence method ultra-low dissolved oxygen sensor on the market. When facing this problem, it is often necessary to use the fluorescence method ultra-low The dissolved oxygen sensor is transferred to the laboratory for calibration. The process is time-consuming and laborious, which brings great troubles to the staff. Based on this, we propose a dissolved oxygen calibration system to solve the above problems

Method used

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Examples

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Embodiment 1

[0033] Example 1: See figure 1 , 3-13. The present invention provides a technical solution: a calibration system for dissolved oxygen, including a mounting plate 1, on which a water control component, an air control component, a detection component, and a drainage component are installed, and the water control component and the air control component are piped Communication, the gas control component is connected with the detection component pipeline, the detection component is connected with the drainage component pipeline, the water control component includes the handwheel valve 22, the first electric valve 23 and the check valve 24, the gas control component includes the air tank 31, the pressure reducing valve 32 and the second electric valve 33, the hand wheel valve 22 is connected to the first electric valve 23 with a pipeline, the other end of the first electric valve 23 is connected with the check valve 24, and the check valve 24 is connected to the second through a thr...

Embodiment 2

[0048] Example 2, such as figure 2 :

[0049]A first three-way valve 61 and a second three-way valve 65 are provided between the check valve 24, the second electric valve 33 and the dissolved oxygen sensor 41, and the first three-way valve 61 includes a first port 62, a second port 63 and a The third port 64, the second three-way valve 65 includes a fourth port 66, a fifth port 67 and a sixth port 68, the first port 62 is connected to the check valve 24 pipelines, and the second port 63 is connected to the second electric valve 33 pipelines Connection, the third interface 64 is connected to the fourth interface 66 pipeline, the fifth interface 67 is connected to the second drain pipe 69 pipeline, and the sixth interface 68 is connected to the inlet port 44 pipeline;

[0050] When the system is running normally, the first interface 62 communicates with the third interface 64, the fourth interface 66 communicates with the sixth interface 68, and the water sample to be measured...

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Abstract

The invention discloses a dissolved oxygen calibration system which is scientific and reasonable in structure and comprises a mounting plate. The mounting plate is provided with a water control assembly, a gas control assembly, a detection assembly and a drainage assembly. The water control assembly is communicated with the gas control assembly through a pipeline, and the gas control assembly is communicated with the detection assembly through a pipeline. The detection assembly is communicated with the drainage assembly through a pipeline, the water control assembly comprises a hand wheel valve, a first electrically operated valve and a check valve, use is safe and convenient, all the electrically operated valves and the dissolved oxygen sensor are connected together through the calibration system to form a whole pipeline system, and the closing state of all the electrically operated valves is controlled through the controller. On-off of a water path and an air path is realized. The dissolved oxygen sensor is used for detecting the content of dissolved oxygen in water by means of the gas circuit, the automatic calibration and test functions of the dissolved oxygen sensor are achieved by means of the gas circuit, and the tedious operation process that the dissolved oxygen sensor needs to be detached and sent back to a laboratory in the prior art can be effectively avoided.

Description

technical field [0001] The invention relates to the technical field of environmental monitoring, in particular to a calibration system for dissolved oxygen. Background technique [0002] The photochemical dissolved oxygen sensor based on the principle of fluorescence quenching has strong anti-interference ability, high measurement accuracy, good repeatability and stability, and is suitable for detecting and monitoring the concentration of dissolved oxygen in various water bodies. , at present, the fluorescence method ultra-low dissolved oxygen sensor is used more and more in semiconductor, boiler and other fields. On the fluorescent substance, the fluorescent substance is immediately excited by the blue light. When the excited substance returns to its original state, it will emit red light. This red light will be measured by the photodiode in the sensor. The time from being excited to returning to its original state after emitting red light, so that the content of dissolved...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64G01N33/18B01D35/02
CPCB01D35/02G01N21/6428G01N33/18G01N2021/6432
Inventor 杨晟魏伟弓燕峰陈小祥胡海波
Owner 常州罗盘星检测科技有限公司
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