CN1325891C - Full-automatic accurate pressure testing control instrument - Google Patents
Full-automatic accurate pressure testing control instrument Download PDFInfo
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- CN1325891C CN1325891C CNB031344143A CN03134414A CN1325891C CN 1325891 C CN1325891 C CN 1325891C CN B031344143 A CNB031344143 A CN B031344143A CN 03134414 A CN03134414 A CN 03134414A CN 1325891 C CN1325891 C CN 1325891C
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Abstract
The present invention relates to a full-automatic accurate pressure test control instrument which can realize multiple items of functions, such as automatic pressure production, automatic pressure stabilization, automatic measurement, etc. in a wide pressure range. The present invention has the advantages of compact structure, portable use, convenient operation, high intelligent degree and high test precision. The present invention comprises a control system, wherein the control system is respectively connected with a pressure system and a measurement system, and the pressure system is connected with the measurement system; the control system comprises a single-chip microcomputer, the single-chip microcomputer is connected with a pressure sensor group of the measurement system, and the single-chip microcomputer is respectively connected with an accurate servo control valve group, an air inlet electromagnetic valve, an air outlet electromagnetic valve and an accurate servo control valve by a control signal generator.
Description
One, technical field:
The present invention relates to a kind of full-automatic accurate pressure checking controller, it can be used for tensimeter, pressure switch, pressure transducer, pressure unit equal pressure measurement products are carried out precision, full automatic calibration measurements.
Two, background technology:
In the background technology, common instrument as pressure reference comprises piston manometer and digital pressure testers, wherein the precision index of piston manometer is to demarcate according to the weight of counterweight, usually can reach 0.05% or 0.02% of counterweight indicated pressure value, the precision index of digital pressure testers is normally demarcated according to the full scale of the pressure transducer of tester configuration, can reach 0.05% or 0.02% of full scale usually.Piston manometer is a kind of mechanical pressure survey benchmark utensil, it can satisfy the high request of the measurement of broad pressure limit for precision preferably, shortcoming is bulky, heavy, and labour intensity is big during the verification high pressure, the pressurization and precision index is discontinuous, not directly perceived.Digital pressure testers is a kind of Technology of Precision Measurement that combines, sensor technology, the high intelligent pressure surveying instrument of micro-computer technology, major advantage has: reading is directly perceived, but the pressure of arbitrfary point in the range is read in continuous coverage, in light weight, can portablely use, shortcoming mainly be precision index can only reach full scale 0.05% or 0.02%, like this for the measurement of lower range pressure, as 10% of full scale pressure, the accuracy of measurement of tester can only reach 0.5% of reading value, can't satisfy the high-acruracy survey requirement far away, become a more serious performance deficiency of current digital pressure testers series products.In order to overcome above-mentioned precision defective, satisfy the high request of different range sections to accuracy, a common tester need dispose a lot of standard range probes, probe is changed in the frequent installation of needs when causing using on the one hand, makes the very huge of purchase cost change for the needs that satisfy the wide-range measurement on the other hand.In addition, what most of digital pressure testers adopted is the pressure mode of making of manual pressure, manual fine-tuning voltage stabilizing, and control and use are very inconvenient.
Three, summary of the invention:
The present invention is in order to solve the weak point in the above-mentioned background technology, a kind of full-automatic accurate pressure checking controller is provided, it can realize making automatically multinomial functions such as pressure, automatic voltage regulation, automatic measurement in extremely wide pressure limit, compact conformation, can portablely use, easy to use, intelligent degree height, measuring accuracy height.
For achieving the above object, the technical solution used in the present invention is:
A kind of full-automatic accurate pressure checking controller, its special character is: comprise control system, control system is connected with measuring system with pressure system respectively, and pressure system also is connected with measuring system.
Above-mentioned control system comprises single-chip microcomputer, and single-chip microcomputer is connected with the pressure transducer group of measuring system, and single-chip microcomputer also is connected with elaborate servo operation valve group, air inlet solenoid valve, pressure-releasing electromagnetic valve and elaborate servo operation valve respectively by control-signals generator.
Above-mentioned pressure system comprises cylinder, and cylinder is connected with elaborate servo operation valve group, air inlet solenoid valve, pressure-releasing electromagnetic valve and elaborate servo operation valve respectively, and elaborate servo operation valve group is connected with the pressure transducer group.
Be connected with supercharger between above-mentioned cylinder and the elaborate servo operation valve group, supercharger comprises oil cylinder, pressurized cylinder, lubricating cup solenoid valve and lubricating cup, and oil cylinder is connected with cylinder, and pressurized cylinder is connected with oil cylinder, pressurized cylinder also is connected with lubricating cup by the lubricating cup solenoid valve, and lubricating cup also is connected with elaborate servo operation valve group.
Above-mentioned single-chip microcomputer is connected with the pressure transducer group of measuring system with traffic pilot by A/D converter, programmable amplifier, and single-chip microcomputer also is connected with temperature sensor by traffic pilot.
Be connected with RS232 or RS485 communication interface on the above-mentioned single-chip microcomputer.
Above-mentioned control system, measuring system are installed in box house, and pressure interface is installed in casing top or rear portion.
A kind of measuring method of full-automatic accurate pressure checking controller, its special character is: the force value that single-chip microcomputer is provided with according to task is selected the sensor on duty in the sensor groups, the output valve of sensor on duty is sent the A/D converter sampling after program control amplification, single-chip microcomputer carries out obtaining real force value after linear error correction and the temperature error correction to sensor original value on duty.
Above-mentioned real force value is linear error and the temperature error that sensor virgin pressure value on duty deducts sensor.
The sensor virgin pressure value is the normal linearity equation of determining with the zero-bit output of sensor and zero value, full scale output and full scale value,
Compared with prior art, the advantage and the effect that have of the present invention is as follows:
1, the present invention is a kind of overstable sensor package technology that merged, frontier nature precision linear error, the temperature error compensation technology, precise and tiny level servo pressure control technology, the reference level pressure checking instrument of microcomputer intelligence computing program control technology, realize that the separate unit instrument is in extremely wide temperature range, as air pressure 0.005MPa～21MPa, in oil pressure 0.07MPa～100MPa scope, can make pressure automatically, automatic voltage regulation, automatically measure, automatic record, automatically print, automatically transmit data, automatically report to the police, automatically judge instrument state, automatically control stops control operation, pressure controling precision can reach more than 0.002%, and measuring accuracy can reach 0.05%～0.005% of reading value;
2, the present invention can realize digital temperature compensating, does not have temperature error in 0～50 ℃ of scope;
3, the present invention has RS232 or RS485 interface, supports operations such as telecommunication, adjustment, printing, the network enabled operation, and have multi-language menus such as the Chinese, English, moral, method, day;
4, the invention solves the significant deficiency technical barrier that present of home make digitizing pressure checking instrument can only reach the full scale levels of precision, to found reading accuracy this sophisticated technology platform and measurement standard for domestic digital intelligent pressure checking instrument, can also apply to the tip device development in many fields, its cost performance is superior, has good social benefit and economic benefit.
Four, description of drawings:
Fig. 1 is a structural representation of the present invention;
Fig. 2 is circuit theory diagrams of the present invention;
Fig. 3 is the control principle figure of control system of the present invention;
Fig. 4 is the structure principle chart of pressure system of the present invention;
Fig. 5 is a program flow diagram of the present invention.
Five, embodiment:
Referring to Fig. 1, the present invention is a kind of box instrument, its measurement, control system are installed in box house, the pressure IO interface is installed in the top or the rear portion of casing, other interfaces such as signal input output interface, communication interface, power interface are installed in the front portion or the rear portion of casing, also can be according to the difference of application scenario and the position changes to some extent.
Referring to Fig. 2, full-automatic accurate pressure checking controller comprises single-chip microcomputer, and the program on the single-chip microcomputer can realize that linear error is proofreaied and correct, temperature error is proofreaied and correct.Single-chip microcomputer is connected with the pressure transducer group of measuring system with traffic pilot by A/D converter, programmable amplifier, and single-chip microcomputer also is connected with temperature sensor by traffic pilot.External input signal is input to single-chip microcomputer by programmable amplifier, D/A converter, and single-chip microcomputer carries out signal output by D/A converter, programmable amplifier.In addition, also be connected with data-carrier store on the single-chip microcomputer, can carry out mass data storage.Be connected with display device on the single-chip microcomputer, and be connected with button by the keyboard display adapter.Single-chip microcomputer also is connected with the instrument power supply system by the power supply conditioning module.Single-chip microcomputer is provided with RS232 or RS485 communication interface, can be continuously or the startup communication function of being interrupted reads, the data of printing stored.The communication function support network operations allows nearly 128 instrument networkings operation, can read storage and real-time data by far-end computer, can also check, be provided with, revise the running parameter of each instrument.
Referring to Fig. 3, the present invention adopts the accurate control of fuzzy control method realization to pressure, and its method mainly comprises:
1, determines sensor on duty and drive electromagnetic valve group work according to setting value;
2, driving traffic pilot according to setting value is communicated with sensor on duty;
3,, feed pneumoelectric magnet valve, pressure-releasing electromagnetic valve or elaborate servo operation valve according to the size output heterogeneity of difference or the electric signal of different amplitudes relatively when the force value of Pretesting and the difference of setting value;
4, in force value when the value of setting, air inlet solenoid valve or pressure-releasing electromagnetic valve are closed, the work of elaborate servo operation valve, according to the size control air inlet or the extraction flow of the control signal of being accepted, the force value that equals to set until the force value of detection;
5, pressure keeps adopting the mode of instant tonifying Qi exhaust to control, and the control tolerance of setting can make servocontrol keep suitable control accuracy, prolongs the serviceable life of valve.
Referring to Fig. 4, the present invention adopts the pressurized air of high-pressure nitrogen bottle or process purification as pressure source, the working sensor room is divided into air pressure and hydraulic pressure two classes, the pressure work room comprises cylinder, cylinder is connected with elaborate servo operation valve group, air inlet solenoid valve, pressure-releasing electromagnetic valve and elaborate servo operation valve respectively, and elaborate servo operation valve group is connected with the pressure transducer group.Adopt a supercharger during hydraulic, supercharger comprises oil cylinder, pressurized cylinder, lubricating cup solenoid valve and lubricating cup, and oil cylinder is connected with cylinder, and pressurized cylinder is connected with oil cylinder, pressurized cylinder also is connected with lubricating cup by the lubricating cup solenoid valve, and lubricating cup also is connected with elaborate servo operation valve group.Figure 4 shows that the structure principle chart of pressure system, baric systerm is economized oil cylinder, pressurized cylinder, lubricating cup solenoid valve and lubricating cup four parts in the sketch map.
Referring to Fig. 5, the sensor groups that the present invention adopts is a set of sensors that covers very wide in range range, sensor in the set is managed the measurement of different sections respectively, Single Chip Microcomputer (SCM) system is selected sensor on duty according to the force value of task setting, the output valve of sensor on duty is sent the A/D converter sampling after program control amplification, single-chip microcomputer carries out obtaining real force value after linear error correction and the temperature error correction to sensor original value on duty, and the expression formula of its math equation is: Y (X)=Y
C-Y
L-Y
W
Y wherein
CBe the normal linearity equation of determining with zero-bit output and zero value, full scale output and the full scale value of sensor: Y
c(X is the output valve of sensor to=KX+b, Y
CBe force value).
Y
LBe according to X region of variation internal standard force value Y
1, Y
2, Y
3... Y
11And actual measured value Y
1, Y
2, Y
3... Y
11And output signal X
1, X
2, X
3... X
11The linear error system of equations F that obtains
1(X), F
2(X), F
3(X) ... F
11(X).
Y
WBe according to the temperature spot T in the pressure transducer serviceability temperature scope
1, T
2, T
3... T
11Last observed pressure Y
T1, Y
T2, Y
T3... Y
T11And reference temperature point T
0Normal pressure value Y (X) and output signal X
1, X
2, X
3... X
11The temperature error system of equations Q that obtains
1(X, T), Q
2(X, T), Q
3(X, T) ... Q
11(X, T).。
Claims (5)
1, a kind of full-automatic accurate pressure checking controller, it is characterized in that: comprise control system, pressure system and measuring system, described control system comprises single-chip microcomputer, single-chip microcomputer is connected with the pressure transducer group of described measuring system, and by control-signals generator respectively with elaborate servo operation valve group, the air inlet solenoid valve, pressure-releasing electromagnetic valve is connected with the elaborate servo operation valve, described pressure system comprises cylinder, cylinder respectively with elaborate servo operation valve group, the air inlet solenoid valve, pressure-releasing electromagnetic valve is connected with the elaborate servo operation valve, and elaborate servo operation valve group is connected with the pressure transducer group of measuring system.
2, full-automatic accurate pressure checking controller according to claim 1, it is characterized in that: be connected with supercharger between described cylinder and the elaborate servo operation valve group, supercharger comprises oil cylinder, pressurized cylinder, lubricating cup solenoid valve and lubricating cup, oil cylinder is connected with cylinder, pressurized cylinder is connected with oil cylinder, pressurized cylinder also is connected with lubricating cup by the lubricating cup solenoid valve, and lubricating cup also is connected with elaborate servo operation valve group.
3, full-automatic accurate pressure checking controller according to claim 2, it is characterized in that: described single-chip microcomputer is connected with the pressure transducer group of measuring system with traffic pilot by A/D converter, programmable amplifier, and single-chip microcomputer also is connected with temperature sensor by traffic pilot.
4, full-automatic accurate pressure checking controller according to claim 3 is characterized in that: be connected with RS232 or RS485 communication interface on the described single-chip microcomputer.
5, full-automatic accurate pressure checking controller according to claim 4, it is characterized in that: described control system, measuring system are installed in box house, and pressure interface is installed in casing top or rear portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031344143A CN1325891C (en) | 2003-07-21 | 2003-07-21 | Full-automatic accurate pressure testing control instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031344143A CN1325891C (en) | 2003-07-21 | 2003-07-21 | Full-automatic accurate pressure testing control instrument |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1595088A CN1595088A (en) | 2005-03-16 |
| CN1325891C true CN1325891C (en) | 2007-07-11 |
Family
ID=34659007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031344143A Expired - Fee Related CN1325891C (en) | 2003-07-21 | 2003-07-21 | Full-automatic accurate pressure testing control instrument |
Country Status (1)
| Country | Link |
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| CN (1) | CN1325891C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101276208B (en) * | 2008-05-06 | 2010-12-08 | 湖北博华自动化系统工程有限公司 | Hydraulic system servo control apparatus |
| CN102175390B (en) * | 2011-02-25 | 2012-11-28 | 南京航空航天大学 | Piezoelectric sensor calibrating device and method |
| CN102445303B (en) * | 2011-11-28 | 2013-10-02 | 武汉理工大学 | Experiment table for mass calibration of oil pressure sensor |
| CN102564711A (en) * | 2011-12-20 | 2012-07-11 | 北京动力机械研究所 | Device and method for detecting water tightness performance of underwater sensor |
| CN103234697A (en) * | 2013-04-24 | 2013-08-07 | 南京化工职业技术学院 | Medium-pressure pressure instrument calibrator |
| CN103557990B (en) * | 2013-10-11 | 2016-04-06 | 中国人民解放军63908部队 | The all-round calibrating installation of a kind of manometer equipment |
| CN106552681A (en) * | 2015-09-25 | 2017-04-05 | 北京振兴计量测试研究所 | Multichannel low pressure test chamber calibrator (-ter) unit |
| CN106556419A (en) * | 2015-09-25 | 2017-04-05 | 北京振兴计量测试研究所 | Low pressure test chamber calibrating installation |
| CN114459818B (en) * | 2022-01-23 | 2023-11-10 | 浙江大学 | Active liquid accurate compensation device and method for deep sea pressure maintaining sampler |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4698998A (en) * | 1986-07-22 | 1987-10-13 | Consolidated Controls Corporation | Pressure calibration systems and control valve assemblies |
| WO1993008454A1 (en) * | 1991-10-14 | 1993-04-29 | Ottestad Breathing Systems As | A testing apparatus for pressure gauges |
| CN2230924Y (en) * | 1994-11-19 | 1996-07-10 | 项华 | Integrated digital pressure and pressure difference meter checking instrument |
| US6408254B1 (en) * | 1998-07-14 | 2002-06-18 | Satis Vacuum Industries Vertriebs-Ag | Procedure and device for calibrating the gas pressure in a process vacuum chamber (receiver) |
| CN1371475A (en) * | 1999-08-27 | 2002-09-25 | 罗斯蒙德公司 | Prediction of error magnitude in pressure transmitter |
-
2003
- 2003-07-21 CN CNB031344143A patent/CN1325891C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4698998A (en) * | 1986-07-22 | 1987-10-13 | Consolidated Controls Corporation | Pressure calibration systems and control valve assemblies |
| WO1993008454A1 (en) * | 1991-10-14 | 1993-04-29 | Ottestad Breathing Systems As | A testing apparatus for pressure gauges |
| CN2230924Y (en) * | 1994-11-19 | 1996-07-10 | 项华 | Integrated digital pressure and pressure difference meter checking instrument |
| US6408254B1 (en) * | 1998-07-14 | 2002-06-18 | Satis Vacuum Industries Vertriebs-Ag | Procedure and device for calibrating the gas pressure in a process vacuum chamber (receiver) |
| CN1371475A (en) * | 1999-08-27 | 2002-09-25 | 罗斯蒙德公司 | Prediction of error magnitude in pressure transmitter |
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|---|---|
| CN1595088A (en) | 2005-03-16 |
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