CN104316626A - Electronic closed-loop type gas flow automatic calibration control device for gas chromatographic instrument - Google Patents
Electronic closed-loop type gas flow automatic calibration control device for gas chromatographic instrument Download PDFInfo
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- CN104316626A CN104316626A CN201410624365.1A CN201410624365A CN104316626A CN 104316626 A CN104316626 A CN 104316626A CN 201410624365 A CN201410624365 A CN 201410624365A CN 104316626 A CN104316626 A CN 104316626A
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Abstract
The invention discloses an electronic closed-loop type gas flow automatic calibration control device for a gas chromatographic instrument. The device is characterized by comprising an industrial computer (1), wherein the industrial computer (1) is connected with a connection control module (2), the connection control module (2) is connected to a to-be-calibrated module (3) and a flow meter (4), and the output end of the to-be-calibrated module (3) is connected to the flow meter (4). According to the device, the calibrated flow can be automatically stored in the external memory of a calibrated module, so that the detection efficiency and precision are improved.
Description
Technical field
The present invention relates to technical field of analytical instruments, specifically just relate to a kind of gas chromatograph electronic closed loop formula gas flow automatic calibration control device.
Background technology
Gas chromatograph is the instrument by vapor-phase chromatography, material being carried out to qualitative and quantitative analysis, be used for carrying out analysis to each component in mixed gas to detect, gas chromatograph is a kind of separation, analysis tool of many mixture, it take gas as mobile phase, adopts the Column chromatography techniques of douche.When the amalyzing substances of many components enters into chromatographic column, because each component gas phase is in the chromatography column different with the partition factor between immobile liquid liquid phase, therefore each component is also just different in the travelling speed of chromatographic column, after certain column length, order is left chromatographic column and is entered detecting device, be converted to electric signal after testing afterwards and deliver to data processing stations, thus complete the qualitative and quantitative analysis to measured matter.Electronic closed loop flow system is applied very wide in oil, chemical industry, biological chemistry, medical and health, food industry, environmental protection etc.It is except for quantitatively and except qualitative analysis, can also the physicochemical constant such as the partition factor of working sample on Stationary liquid, activity coefficient, molecular weight and specific surface area.
Gas chromatograph system system comprises five large ingredients: air-channel system, sampling system, piece-rate system, temperature control system and detection record system, in its air-channel system, gas flow controls to be unusual factor in gas chromatographic analysis, along with the development of measuring technology, electronic closed loop flow system device gas flow air-path control system automaticity is more and more higher, because the gas flow of electronic closed loop flow system device is less, generally between tens milliliters to hundreds of milliliter.In order to analyze material composition, need to demarcate gas flow.In the staking-out work of gas flow, in order to obtain flow accurately, often a flow curve needs demarcation tens points, could calibrate flow curve very accurately.This work, by serial connection external flow meter, is transferred to corresponding flow, and is manually made a record one by one.Then be input in external memory storage, then call can use normally by single-chip microcomputer.In this process, some data errors can not be there is, otherwise must again demarcate.Whole process is very loaded down with trivial details, and more easily occurs error, causes whole test process inefficiency.
Summary of the invention
The object of the invention is for existing gas chromatograph when carrying out constituent analysis to material, need the technological deficiency of manually gas flow being demarcated, a kind of gas chromatograph electronic closed loop formula gas flow automatic calibration control device is provided, the flow calibrated can be stored in automatically is calibrated in the external memory storage of module, improves the precision of detection efficiency and detection.
Technical scheme
In order to realize above-mentioned technical purpose, the present invention designs a kind of gas chromatograph electronic closed loop formula gas flow automatic calibration control device, it is characterized in that: it comprises industrial computer, described industrial computer is connected with link control module, described link control module accesses module to be calibrated and flowmeter, and described module output terminal to be calibrated is connected to flowmeter;
The air intake opening of described flowmeter is equipped with reduction valve, and flowmeter comprises flow sensor, and flow sensor is by Single-chip Controlling, and the output terminal of flowmeter is connected with proving flowmeter;
Further, described link control module is single-chip microcomputer.
Beneficial effect
A kind of gas chromatograph electronic closed loop formula gas flow automatic calibration control device provided by the invention, automatically can be stored in the flow calibrated and be calibrated in the external memory storage of module, improve the precision of detection efficiency and detection.
Accompanying drawing explanation
Accompanying drawing 1 is annexation schematic diagram of the present invention.
Accompanying drawing 2 is flowmeter annexation schematic diagram in the present invention.
Accompanying drawing 3 is link control module annexation schematic diagram in the present invention.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
Embodiment
As shown in accompanying drawing 1 ~ 3, a kind of gas chromatograph electronic closed loop formula gas flow automatic calibration control device, it is characterized in that: it comprises industrial computer 1, described industrial computer 1 is connected with link control module 2, described link control module 2 accesses module 3 to be calibrated and flowmeter 4, and described module 3 output terminal to be calibrated is connected to flowmeter 4;
The air intake opening of described flowmeter 4 is equipped with reduction valve 5, and flowmeter 4 comprises flow sensor 401, and flow sensor 401 controls by single-chip microcomputer 402, and the output terminal of flowmeter 4 is connected with proving flowmeter 6;
Described link control module 2 is single-chip microcomputer.
The course of work of the present invention is: first computing machine sends calibration command, then whole system enters calibration mode, after this order card extender receives, be transmitted to module to be calibrated, after module to be calibrated receives orders, automatic closedown flowrate control valve, in this process, the reading of card extender constantly reading flow gauge, when flow reading in flowmeter is 0ml/min, can notify module to be calibrated, now calibration module reads the flow that flow value is exactly corresponding 0ml/min, and these data are saved in external memory storage.Such flow just calibration is good.Then notify computing machine, computing machine can send second traffic alignment value 20ml/min.Be transmitted to by interconnecting module and be calibrated module, after calibration module receives orders, provide a Trend value according to flow cycled trend, carrying out the closed-loop control of oneself, when controlling basicly stable, reading actual flow value by interconnecting module, compare their deviation, calculate and adjust Trendline.To be controlled stable after compare again, then to adjust, until within the deviation of two flows is less than 0.2ml/min, represent successful calibration.The calibration of flow is gone down one by one like this, until the maximal value of our predetermined calibration flow.Calibration terminates.
Claims (2)
1. a gas chromatograph electronic closed loop flow system gas flow automatic calibration control device, it is characterized in that: it comprises industrial computer (1), described industrial computer (1) is connected with link control module (2), described link control module (2) accesses module to be calibrated (3) and flowmeter (4), and described module to be calibrated (3) output terminal is connected to flowmeter (4);
The air intake opening of described flowmeter (4) is equipped with reduction valve (5), flowmeter (4) comprises flow sensor (401), flow sensor (401) controls by single-chip microcomputer (402), and the output terminal of flowmeter (4) is connected with proving flowmeter (6).
2. a kind of gas chromatograph electronic closed loop flow system gas flow automatic calibration control device as claimed in claim 1, is characterized in that: described link control module (2) is single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410624365.1A CN104316626A (en) | 2014-11-06 | 2014-11-06 | Electronic closed-loop type gas flow automatic calibration control device for gas chromatographic instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410624365.1A CN104316626A (en) | 2014-11-06 | 2014-11-06 | Electronic closed-loop type gas flow automatic calibration control device for gas chromatographic instrument |
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|---|---|
| CN104316626A true CN104316626A (en) | 2015-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410624365.1A Pending CN104316626A (en) | 2014-11-06 | 2014-11-06 | Electronic closed-loop type gas flow automatic calibration control device for gas chromatographic instrument |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111766327A (en) * | 2020-07-09 | 2020-10-13 | 安东仪器仪表检测有限公司 | Calibration method of on-line gas chromatograph |
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| US5531959A (en) * | 1994-01-31 | 1996-07-02 | Hamilton Company | Automated liquid handling and computer controlled system and method for solid phase chromatographic extractions |
| US5642271A (en) * | 1995-08-31 | 1997-06-24 | Hewlett-Packard Company | Pneumatic control system |
| CN101501597A (en) * | 2006-08-03 | 2009-08-05 | 日立金属株式会社 | Flow control using mass flow controller |
| CN201803879U (en) * | 2010-10-14 | 2011-04-20 | 金坛市亿通电子有限公司 | Harmful gas sampler based on singlechip automatic control |
| CN204359760U (en) * | 2014-11-06 | 2015-05-27 | 上海仪电分析仪器有限公司 | Gas chromatograph electronic closed loop formula gas flow automatic calibration control device |
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2014
- 2014-11-06 CN CN201410624365.1A patent/CN104316626A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5531959A (en) * | 1994-01-31 | 1996-07-02 | Hamilton Company | Automated liquid handling and computer controlled system and method for solid phase chromatographic extractions |
| US5642271A (en) * | 1995-08-31 | 1997-06-24 | Hewlett-Packard Company | Pneumatic control system |
| CN101501597A (en) * | 2006-08-03 | 2009-08-05 | 日立金属株式会社 | Flow control using mass flow controller |
| CN201803879U (en) * | 2010-10-14 | 2011-04-20 | 金坛市亿通电子有限公司 | Harmful gas sampler based on singlechip automatic control |
| CN204359760U (en) * | 2014-11-06 | 2015-05-27 | 上海仪电分析仪器有限公司 | Gas chromatograph electronic closed loop formula gas flow automatic calibration control device |
Non-Patent Citations (4)
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| 何国琛 等: "气相色谱电子流量/压力控制模块研制和应用", 《光学仪器》 * |
| 全国流量容量计量技术委员会: "《速度式流量计》", 31 October 2008, 中国计量出版社 * |
| 董国庆: "流量标定装置控制系统的改进", 《齐鲁石油化工》 * |
| 霍兴旺 等: "调节阀与流量计构成的闭环系统", 《PLC&FA》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111766327A (en) * | 2020-07-09 | 2020-10-13 | 安东仪器仪表检测有限公司 | Calibration method of on-line gas chromatograph |
| CN111766327B (en) * | 2020-07-09 | 2023-10-27 | 安东仪器仪表检测有限公司 | Calibration method of online gas chromatograph |
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Application publication date: 20150128 |