CN103308123A - Connection method for collecting impulse of secondary instrument - Google Patents
Connection method for collecting impulse of secondary instrument Download PDFInfo
- Publication number
- CN103308123A CN103308123A CN2013102141442A CN201310214144A CN103308123A CN 103308123 A CN103308123 A CN 103308123A CN 2013102141442 A CN2013102141442 A CN 2013102141442A CN 201310214144 A CN201310214144 A CN 201310214144A CN 103308123 A CN103308123 A CN 103308123A
- Authority
- CN
- China
- Prior art keywords
- instrument
- pulse
- impulse
- turbine
- resistor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
A connection method for collecting impulse of a secondary instrument belongs to the field of verification of turbine flowmeters. A 24 V power supply is adopted to be in series connection with a resistor of 1000 ohm and then be connected to the positive pole and the negative pole of a primary instrument; a collection circuit of a computer is connected to the two ends of the resistor; when gas flows though a turbine, impulse generated by the primary instrument acts on the two ends of the resistor, so that the computer can collect impulse signals, and the flow rate is worked out according to the number of the collected impulse and is compared with a set value to work out the errors of instruments; and four points are selected on each instrument according to the measuring range of working conditions, and each point is measured for three times. The connection method has the advantage of solving the problem that the errors are large and the accuracy of the instrument can not be ensured because of too many of anthropic factors of the verification manner.
Description
Technical field
The invention belongs to turbo flow meter calibrating field, a kind of method of attachment that secondary instrument sends pulse of gathering particularly is provided, be convenient to gather the umber of pulse that turbine sends.
Background technology
The principle of work of turbo flow meter: when gas passed through turbine, primary element sent pulse and gives secondary instrument, and secondary instrument comes calculated flow rate according to umber of pulse.Turbine flow in respect of individual fixing coefficient is: 1m
3The coefficient that=K(K is fixing passes through 1m
3Gas, the umber of pulse that turbine sends), but instrument with a period of time after, need examine and determine the pulse that turbine sends, whether meet the demands with this error in judgement.
At present, the metering institute (the perhaps First Astronautic Research Institute for Measurement and Test) that qualification arranged has two kinds to the calibration method of turbo flow meter: 1, by the mechanical part of check meter, examine the accuracy of instrument.2, the umber of pulse (turbo flow meter can only be the instrument of three-wire system) by the computer acquisition primary element, and change into the operating mode flow, with the input value contrast, check the error of instrument.
Because the instrument of rock gas clearing is turbo flow meters of import, primary element is the instrument of two-wire system, so much measure the umber of pulse that primary element can't be gathered by institute, can only assign to verify the accuracy of instrument by the Machinery Ministry of calibrating primary element.This calibrating mode human factor is too many, causes the error of examining and determine excessive, can't guarantee the accuracy of instrument.
Summary of the invention
The object of the present invention is to provide a kind of method of attachment that secondary instrument sends pulse of gathering, it is too many to have solved calibrating mode human factor, causes the error of examining and determine excessive, can't guarantee the problem of the accuracy of instrument.
The present invention passes through the transformation to the circuit of primary instrument, namely adopt the resistance in a 1K Europe on 24 volts the power supply string, receive on the positive pole (red line) and negative pole (yellow line) of primary instrument, the collection circuit of computing machine is received the two ends of resistance, when gas passed through turbine, the pulse action that primary element produces was in the two ends of resistance, and computing machine just can collect pulse signal, be converted into flow according to the umber of pulse of gathering, contrast the error that calculates instrument with setting value.Every instrument is according to operating mode measurement range selection 4 points, each point measurement 3 times.All these processes all are computer acquisitions, need not the people for participating in, and guarantee the calibrating accuracy of instrument like this.
Each turbo flow meter has a fixed coefficient, and 1m
3=K (umber of pulse), but after turbine used a period of time, COEFFICIENT K can change.Original COEFFICIENT K=12926.2 by the calibrating instrument, but after selecting four points fixed, COEFFICIENT K=13029.69 that computing machine calculates, it is big that coefficient becomes, if secondary instrument is not adjusted accordingly, cause the continuous data of instrument to become big, for this reason, in order to guarantee the accuracy of instrument, we contact instrument producer and utilize the new instrument coefficient K of manual operator input.
Description of drawings
Fig. 1 is the pulse collection connection layout of three-wire meter.The computer expert crosses the connection of three-wire system and can gather accurately.
Fig. 2 is the connection layout of twin wire instrument.
Embodiment
The present invention passes through the transformation to the circuit of primary instrument, namely adopt the resistance in a 1K Europe on 24 volts the power supply string, receive on the positive pole (red line) and negative pole (yellow line) of primary instrument, the collection circuit of computing machine is received the two ends of resistance, when gas passed through turbine, the pulse action that primary element produces was in the two ends of resistance, and computing machine just can collect pulse signal, be converted into flow according to the umber of pulse of gathering, contrast the error that calculates instrument with setting value.Every instrument is according to operating mode measurement range selection 4 points, each point measurement 3 times.All these processes all are computer acquisitions, need not the people for participating in, and guarantee the calibrating accuracy of instrument like this.
Fig. 2 is the connection layout of twin wire instrument.By this connected mode, computer is the signal of acquisition instrument accurately.The operating mode flow process of instrument is 32-650m
3, according to 4 points of operating mode process selecting of instrument, be respectively 33m
3, 220 m
3, 410 m
3, 600 m
3Each point is surveyed 3 times, the mean coefficient of instrument by the calculated signals of gathering.And then can calculate the error of instrument.
Claims (1)
1. gather the method for attachment that secondary instrument sends pulse for one kind, it is characterized in that, adopt the resistance in a 1K Europe on 24 volts the power supply string, receive on the positive pole and negative pole of primary instrument, the collection circuit of computing machine is received the two ends of resistance, when gas passes through turbine, the pulse action that primary element produces is in the two ends of resistance, computing machine just can collect pulse signal, is converted into flow according to the umber of pulse of gathering, and contrasts the error that calculates instrument with setting value;
Every instrument is according to operating mode measurement range selection 4 points, each point measurement 3 times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102141442A CN103308123A (en) | 2013-05-31 | 2013-05-31 | Connection method for collecting impulse of secondary instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102141442A CN103308123A (en) | 2013-05-31 | 2013-05-31 | Connection method for collecting impulse of secondary instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103308123A true CN103308123A (en) | 2013-09-18 |
Family
ID=49133601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013102141442A Pending CN103308123A (en) | 2013-05-31 | 2013-05-31 | Connection method for collecting impulse of secondary instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103308123A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2556604Y (en) * | 2002-03-01 | 2003-06-18 | 王保宁 | Turbine flow sensor |
| RU2223467C2 (en) * | 1999-03-26 | 2004-02-10 | Майкро Моушн, Инк. | Flowmeter calibration system |
| CN102466500A (en) * | 2010-11-19 | 2012-05-23 | 中国电子科技集团公司第五十研究所 | Device and method for detecting quantity of output pulses of pulse type vortex shedding flowmeter, and device and method for determining abnormity of output pulses |
-
2013
- 2013-05-31 CN CN2013102141442A patent/CN103308123A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2223467C2 (en) * | 1999-03-26 | 2004-02-10 | Майкро Моушн, Инк. | Flowmeter calibration system |
| CN2556604Y (en) * | 2002-03-01 | 2003-06-18 | 王保宁 | Turbine flow sensor |
| CN102466500A (en) * | 2010-11-19 | 2012-05-23 | 中国电子科技集团公司第五十研究所 | Device and method for detecting quantity of output pulses of pulse type vortex shedding flowmeter, and device and method for determining abnormity of output pulses |
Non-Patent Citations (2)
| Title |
|---|
| 朱丽: "涡轮流量计检定问题分析", 《计测技术》, vol. 30, 17 November 2010 (2010-11-17), pages 112 - 113 * |
| 李锦冬: "基于标准表法的流量标准装置设计与实现", 《工业计量》, vol. 17, no. 04, 15 July 2007 (2007-07-15), pages 24 - 27 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101788313B (en) | High-frequency response fluid transient flow meter | |
| CN202230595U (en) | Multichannel data acquisition system used for vibrating wire transducers | |
| RU2012158358A (en) | GAS FUEL TRANSMISSION SYSTEM AND METHOD FOR CONSUMERS | |
| CN107505588A (en) | A kind of electric energy meter combines error testing method and system | |
| CN104344862B (en) | The detection method of FCM10A type fuel consumption meters | |
| CN102121376B (en) | Intelligent coal seam gas pressure tester | |
| CN104198811B (en) | Method and device for measuring frequency of low frequency signal | |
| CN203224283U (en) | Liquid flow field calibration device | |
| CN105509871B (en) | It is a kind of applied to vibrating sensor from calibrating installation and its from calibration method | |
| CN105090084B (en) | Draught fan online monitoring system and method | |
| CN104597513B (en) | A kind of acquisition methods of geophysics magnetic field big data pretreatment values | |
| CN104964729B (en) | A kind of calibrating installation of fluid metering instrument | |
| CN206161118U (en) | System for be used for online calibration steam flow meter accuracy | |
| CN103308123A (en) | Connection method for collecting impulse of secondary instrument | |
| CN206891638U (en) | A kind of online non-destructive pressure detector of portable hydraulic system | |
| CN101650212B (en) | Method for evaluating accuracy of flow measuring data by current meter method | |
| CN106679738B (en) | Low-power consumption gas flow measurement circuit with self-diagnostic function | |
| CN210953042U (en) | Synchronous method flow testing device | |
| CN110591768B (en) | Method for measuring flow of synthesis gas washing system under different working conditions | |
| CN204694667U (en) | Based on the two-dimentional concrete parameters tester of reinforcing bar electrode | |
| CN203964961U (en) | A kind of portable flow metering device | |
| CN102360024A (en) | Paper pulp flow velocity and flow measuring method | |
| CN202471192U (en) | Rapid water meter calibrating device | |
| CN102419161B (en) | Pipeline length measuring device for pipeline full of incompressible fluid | |
| CN202974355U (en) | Ultrasonic flow measurement device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130918 |