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Deviation detection system and method for gas calibrator

A technology of deviation detection and calibrator, which is applied in the structural details of gas analyzers, analysis of gas mixtures, standard gas analyzers, etc., can solve the problem of low test efficiency and achieve the effect of improving detection efficiency

Inactive Publication Date: 2019-04-16
TIANJIN ENVIRONMENT MONITORING CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the deviation detection of gas calibrators is mostly done manually one by one, and the test efficiency is low

Method used

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  • Deviation detection system and method for gas calibrator
  • Deviation detection system and method for gas calibrator

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] figure 1 It is a system structure diagram of the deviation detection system of the gas calibrator in Embodiment 1 of the present invention.

[0056] see figure 1 , the deviation detection system of the gas calibrator, comprising: a calibrator 101, a flow meter 102, an industrial computer 103, a multi-serial communication card 104, a digital quantity collector 105 and a switching power supply 106;

[0057] There are 3 calibrators 101, and the numbers of the 3 calibrators 101 are respectively 1#, 2#, and 3#; the gas inlets of each of the calibrators 101 are communicated with the zero gas source, and each of the calibrators The gas outlets of 101 are all communicated with the gas inlets of the flowmeters 102; a solenoid valve 107 is arranged at the gas inlets of each calibrator 101, and the number of the solenoid valve located at the gas inlet of the 1# calibrator is D1 , the number of the solenoid valve located at the gas inlet of the 2# calibrator is D2, and the number o...

Embodiment 2

[0065] Embodiment 2 discloses a deviation detection method of a gas calibrator. This method is applied to the deviation detection system of the gas calibrator in embodiment 1.

[0066] figure 2 It is a method flowchart of the deviation detection method of the gas calibrator in Embodiment 2 of the present invention.

[0067] see figure 2 , the method includes:

[0068] Step 201: Obtain a preset flow command;

[0069] Step 202: Open the solenoid valve at the gas inlet of the calibrator to be tested, and close the solenoid valves at the gas inlet of the calibrator other than the calibrator to be tested;

[0070] Step 203: supply zero gas to the calibrator to be tested;

[0071] Step 204: Send the preset flow command to the calibrator to be tested, so that the calibrator to be tested adjusts the opening and closing degree according to the preset flow command;

[0072] Step 205: Obtain the flow value detected by the calibrator to be tested in real time, and judge whether th...

Embodiment 3

[0096] Embodiment 3 is a more specific embodiment relative to Embodiment 2.

[0097] Before testing, first preset a set of flow values ​​(such as small flow group: 20mL / min, 30mL / min, 40mL / min, 50mL / min, 60mL / min, 70mL / min or large flow group: 2L / min, 3L / min, 4L / min, 5L / min, 6L / min, 7L / min), and set the gas supply time, for example, the gas supply time corresponding to each flow value is 5min, and the total gas supply time of the whole experiment is 120min.

[0098] When using a small flow group, q=2mL / min, when using a large flow group, q=0.2L / min.

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Abstract

The invention discloses a deviation detection system and method for a gas calibrator. The system comprises calibrators, a flowmeter, an industrial control computer and a multi-serial port communication card, wherein there are a plurality of calibrators; a gas inlet of each calibrator is communicated with a zero gas source, and a gas outlet of each calibrator is communicated with a gas inlet of theflowmeter; there is an electromagnetic valve at the gas inlet of each calibrator; a communication interface of the industrial control computer is connected with a bus interface of the multi-serial port communication card, and multiple ports of the multi-serial port communication card are electrically connected with the flowmeter, a digital quantity collector and the plurality of calibrators respectively; multiple output interfaces of the digital quantity collector are electrically connected with the plurality of electromagnetic valves; the calibrators are used for controlling and collecting the flow in pipelines; the industrial control computer controls the calibrators and the electromagnetic valves and collects flow values detected by the calibrators and the flowmeter; and only one electromagnetic valve is in an open state at most at the same moment. The detection efficiency can be improved by adopting the system and method disclosed by the invention.

Description

technical field [0001] The invention relates to the performance field of a gas calibrator, in particular to a deviation detection system and method of a gas calibrator. Background technique [0002] In the automatic monitoring system of ambient air quality, the gas calibrator plays an extremely important role, and the accuracy of the detection data of the gas calibrator has an important impact on the entire monitoring work. Therefore, in the automatic monitoring system of ambient air quality, the gas calibration instrument performance plays a crucial role. How to ensure that the performance of the gas calibrator meets the requirements has become an extremely concerned issue in the field of ambient air quality. When the gas calibrator has a large deviation in the detection results, it will seriously affect the results of air quality monitoring. Therefore, before the gas calibrator is applied, it is necessary to perform a deviation test on the gas calibrator to ensure that t...

Claims

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Application Information

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IPC IPC(8): G01N33/00
CPCG01N33/0006G01N33/007
Inventor 陈魁唐邈郑乃源郭瑞元洁李媛刘文秀白宇肖致美
Owner TIANJIN ENVIRONMENT MONITORING CENT
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