CN102680170B - System for improving accuracy of pressure measuring equipment - Google Patents
System for improving accuracy of pressure measuring equipment Download PDFInfo
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- CN102680170B CN102680170B CN201210171177.9A CN201210171177A CN102680170B CN 102680170 B CN102680170 B CN 102680170B CN 201210171177 A CN201210171177 A CN 201210171177A CN 102680170 B CN102680170 B CN 102680170B
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Abstract
The invention discloses a system for improving accuracy of pressure measuring equipment. A data sheet before calibration of the pressure measuring equipment is transmitted to a pressure calibration department; a standard pressure source is driven to output a pre-calibration data sheet according to equipment parameters corresponding to the pressure measuring equipment, and the pre-calibration data sheet is transmitted to a user calibration system; the pressure measuring equipment obtains an equipment output data sheet; accuracy verification is carried out by a PVC (poly vinyl chloride) data sheet computer, so that a pressure measuring equipment calibration mathematical model is obtained; a calibration data sheet is output by the standard pressure source to the pressure calibration computer so as to calibrate output air pressure; and the pressure measuring equipment obtains a calibration output data sheet to replace the data sheet before calibration. The cost for calibrating the pressure measuring equipment can be reduced by the system disclosed by the invention; and the system is simple and practical in method, and low in cost.
Description
Technical field
The present invention relates to base measuring pressure measuring equipment and remote measurement and control technology field, especially a kind of PVC tables of data of utilizing is by the system of internet base measuring pressure measuring equipment precision.
Background technology
By standard PVC tables of data, can replace standard pressure generator and carry out base measuring pressure measuring equipment, its method is that standard pressure generator is exported to N pressure calibration data, and respective production becomes standard PVC tables of data PVC
standard N, each standard PVC tables of data PVC
standard Nthere is P
standard N, V
standard N, C
standard Nthree groups of tables of data, every group of tables of data has N standard output data and meets P
standard N=V
standard N* C
standard N, wherein P
standard Nn output pressure value of normal data table, V
standard Nn output voltage values of normal data table, C
standard Nn output coefficient value of normal data table.Can take out gamut scope any point PVC data from PVC tables of data calibrates pressure measuring device as calibration data.This type of technology has at present: the Chinese patent " a kind of device of converting pressure calibration data into data tables " that 1, application number is 201020189756.2, continuous stable air pressure can be provided, and convert the calibration data of pressure testing and controlling instrument to PVC tables of data.Pressure measuring device, pressure transducer are carried out to parametric calibration displacement by PVC tables of data.Method is simple, with low cost, efficiency is higher, saved the cost of base measuring pressure measuring equipment.Saved pressure source has been delivered to the various expenses of high one-level measurement unit, had huge economic benefit and social benefit.But this technology can not be converted to PVC tables of data standard pressure carrys out driving pressure measuring equipment, more cannot to pressure measuring device, implement calibration by internet.2, the Chinese patent " a kind of remote intelligent pressure sensor calibration system " that application number is 201110332582.X, by PVC
calibration source Nv in tables of data
calibration source Noutput data are through D/A transducer output voltage, and drive compression pump output pressure, divides the pressurization of N section to implement to generate a new intelligent pressure sensor PVC after calibration to intelligent pressure sensor through gas circuit
calibration Ntables of data, replaces original intelligent pressure sensor PVC
check Ntables of data, ensures that the precision after intelligent pressure sensor calibration is operated in acceptability limit, but this technology can only calibrate single intelligent pressure sensor, can not to all pressure measuring devices, calibrate by internet, and calibration precision is low.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of system that improves pressure measuring device precision, can to all pressure measuring devices, calibrate by internet, calibration precision is high.
The technical solution adopted for the present invention to solve the technical problems is: the device, standard pressure generator, PVC data table stores device, PVC tables of data computing machine, device parameter database, pressure coefficient process database, Internet Server and M the user's calibration system that comprise converting pressure calibration data into data tables.M is more than or equal to 1 random natural number.
By the tables of data PVC before the M of user's calibration system pressure measuring device calibration
n before calibrationbe stored in pressure measuring device storer separately with device parameter, device parameter comprises, 1, basic parameter (facility registration number of queries, tenure of use, maintenance record, range, metering system, device type); 2, calibration factor matching parameter (gain, intercept, pressure, voltage, temperature, frequency acquisition); 3, precision parameters (precision grade and permissible error, accuracy grade and permissible error), by tables of data PVC
n before calibrationby pressure calibration computing machine, Internet Server, be delivered to the PVC tables of data computing machine of pressure calibration department with device parameter, in access arrangement parameter database, select the device parameter corresponding with pressure measuring device, start standard pressure generator, according to above-mentioned parameter, drive N pre-calibration air pressure P of standard pressure generator output
pre-calibration N, have N pre-calibration voltage V one to one simultaneously
pre-calibration Nwith N pre-calibration coefficient C
in advance calibration N, P
pre-calibration N=V
pre-calibration N* C
pre-calibration N, by P
pre-calibration N, V
pre-calibration N, C
pre-calibration Nmake pre-calibration data table PVC
pre-calibration N, by PVC
pre-calibration Ndeposit in PVC data table stores device, and by PVC tables of data computing machine, by Internet Server, transfer to user's calibration system, output pressure P
pre-calibration output Nbe applied to pressure measuring device gas circuit input end, pressure measuring device obtains N air pressure P
equipment output N, have N voltage V one to one simultaneously
equipment output Nwith N coefficient C
equipment output N, make equipment output tables of data PVC
equipment output N, by Internet Server, transfer to PVC tables of data computing machine, PVC tables of data computing machine C
pre-calibration Nto C
equipment output Ncarry out precision verification, the trueness error value range that calibrating is obtained is sent to sensitivity coefficient amending unit, obtains pressure measuring device calibrating mathematical model, then exports and calibrate air pressure P to the device startup standard pressure generator of converting pressure calibration data into data tables
calibration N, have N calibration voltage V one to one simultaneously
calibration Nwith N calibration factor C
calibration factor N, P
calibration N=V
calibration N* C
calibration factor N, by P
calibration N, V
calibration N, C
calibration Nmake calibration data table PVC
calibration N, by PVC
calibration Ndeposit in PVC data table stores device, and by Internet Server, transfer to pressure calibration computing machine by PVC tables of data computing machine, use V
calibration Ndriver output calibration output pressure P
calibration output Nby gas circuit, to pressure measuring device gas circuit input end, pressure measuring device obtains N calibration output pressure P
calibration output N, have N calibration output voltage V one to one simultaneously
calibration output Nwith N calibration output coefficient C
calibration factor output N, by P
calibration output N, V
calibration output N, C
calibration factor output Nmake calibration output tables of data PVC
calibration output N, by the tables of data PVC after calibration
calibration output Nreplacement data table PVC
n before calibration, PVC tables of data computing machine is by PVC
calibration output Ndeposit in PVC data table stores device, and generate calibration certificate and transfer to user's calibration system.N is greater than 2 random natural number.
Described device parameter database is comprised of basic parameter unit, calibration factor matching unit, precision setting unit.Basic parameter unit stores the available corresponding parameter with mating, comprise the trade mark enquiries numbering of various device, tenure of use, maintenance record, range rank (minute-pressure section, low pressure stage, high pressure section, UHV (ultra-high voltage) section), device measuring mode is (differential, absolute pressure formula, negative pressure transducer, positive pressure sensor), device type (Liquid Column Manometer, flexible type pressure gauge, load-type pressure gauge, electric pressure gage), content and the indication range such as transformational relation between various pressure units, calibration factor matching unit is stored the gain of available various device, intercept, pressure, voltage, temperature, sampling rate, content and the indication ranges such as average sample rate, precision setting unit is stored available various device precision grade and permissible error, the content such as accuracy grade and permissible error and indication range.
Described pressure coefficient process database is examined and determine unit, sensitivity coefficient amending unit and calibration factor amending unit by pressure coefficient and is formed.PVC tables of data computing machine C
pre-calibration Nto C
equipment output Ncarry out precision verification, the trueness error value range that calibrating is obtained transfers to the correction of sensitivity coefficient amending unit through sensitivity coefficient, by calibration factor amending unit, adopt least square method to try to achieve fitting a straight line and obtain pressure measuring device calibrating mathematical model, then start standard pressure generator output pressure to the device of converting pressure calibration data into data tables.
Described user's calibration system comprises pressure calibration computing machine, PVC tables of data programmable device, high-speed D/A converters, pressure stability controller, peristaltic pump, pressure measuring device and pressure measuring device storer.By PVC
n before calibration, PVC
in advance calibration Nbe delivered to pressure calibration computing machine with device parameter, pressure calibration computing machine sends V
pre-calibration Nto PVC tables of data programmable device, by high-speed D/A converters output dc voltage, controlled pressure stability controller drives peristaltic pump, output P
pre-calibration output Nto pressure measuring device gas circuit input end, pressure measuring device obtains N air pressure P
equipment output N, have N voltage V one to one simultaneously
equipment output Nwith N coefficient C
equipment output N, make equipment output tables of data PVC
equipment output N; PVC
calibration Nby Internet Server, be sent to pressure calibration computing machine, V
calibration Nby PVC tables of data programmable device and high-speed D/A converters output dc voltage, controlled pressure stability controller drives peristaltic pump, output P
calibration output Nto pressure measuring device gas circuit input end, pressure measuring device obtains N calibration air pressure P
calibration output N, simultaneously to there being N V
calibration output Nwith N C
calibration output N, correspondence is made calibration output tables of data PVC one by one
calibration output N, by the PVC after calibration
calibration output Nreplace PVC
calibration front N, and deposit in pressure measuring device storer.
The invention has the beneficial effects as follows: the present invention's standard pressure generator is converted to PVC tables of data, by internet, all pressure measuring devices is carried out to pressure calibration, obtains calibration data table PVC
calibration Ncalibration precision is high, can reduce the cost of base measuring pressure measuring equipment, and method is simple, practical, with low cost, has huge economic benefit and social benefit, can save a large amount of human and material resources and financial resources.Native system can also be applied to the fields such as other commercial production, scientific research.
Accompanying drawing explanation
Fig. 1 is device schematic diagram of the present invention (fine dotted line is gas circuit);
Fig. 2 is equipment pressure coefficient process database schematic diagram;
Fig. 3 is user's calibration system schematic diagram (dotted line is gas circuit).
Embodiment
The present invention is by the tables of data PVC before the pressure measuring device calibration of user's calibration system
n before calibrationdata and device parameter to device parameter database, select corresponding and matching parameter to drive standard pressure generator to obtain having the pre-calibration data table PVC of output characteristics by internet, PVC tables of data computing machine
pre-calibration N, transfer to pressure measuring device and obtain equipment output tables of data PVC
equipment output N, then enter pressure coefficient process database and obtain pressure measuring device calibrating mathematical model, the device that transfers to standard pressure generator starting pressure calibration data translation data table obtains having the calibration data table PVC of output characteristics
calibration N, according to calibration data table PVC
calibration Nuse calibration data table PVC
calibration Nin V
calibration Nvoltage data table data-driven peristaltic pump output calibration output pressure P
calibration output N, have V one to one simultaneously
calibration output Nand C
calibration output Ndata, make equipment output tables of data PVC
calibration output N, use PVC
calibration output Nreplace PVC
n before calibrationand deposit in pressure measuring device storer.
The technical solution adopted for the present invention to solve the technical problems is: the device of converting pressure calibration data into data tables, standard pressure generator, PVC data table stores device, PVC tables of data computing machine, device parameter database, pressure coefficient process database, Internet Server, user's calibration system 1(pressure calibration computing machine 1, pressure measuring device 1) ... user's calibration system M(pressure calibration computing machine M, pressure measuring device M).M is more than or equal to 1 random natural number.
User's calibration system 1 ... tables of data PVC before the pressure measuring device calibration of M
n before calibrationbe stored in pressure measuring device storer separately with device parameter, device parameter comprises, 1, basic parameter (facility registration number of queries, tenure of use, maintenance record, range, metering system, device type); 2, calibration factor matching parameter (gain, intercept, pressure, voltage, temperature, frequency acquisition); 3, precision parameters (precision grade and permissible error, accuracy grade and permissible error), by tables of data PVC
n before calibrationby pressure calibration computing machine, Internet Server, be delivered to the PVC tables of data computing machine of pressure calibration department with device parameter, in access arrangement parameter database, select after the parameter of and coupling corresponding with pressure measuring device, the technology of application Chinese patent CN201020189756.2 " a kind of device of converting pressure calibration data into data tables " by name, starts standard pressure generator stable output pre-calibration air pressure P
pre-calibration N, have V one to one simultaneously
pre-calibration Nand C
pre-calibration coefficient Noutput, and meet P
pre-calibration N=V
pre-calibration N* C
pre-calibration coefficient N, wherein, P
pre-calibration Nn pre-calibration atmospheric pressure value of standard pressure generator output, V
pre-calibration Nn pre-calibration magnitude of voltage of standard pressure generator output, C
pre-calibration coefficient Nn pre-calibration coefficient value of high-precision pressure sensor in standard pressure generator, by P
pre-calibration N, V
pre-calibration N, C
pre-calibration coefficient Nmake pre-calibration data table PVC
pre-calibration Ndeposit in PVC data table stores device, then to PVC tables of data computing machine by Internet Server to user's pressure calibration computing machine, pre-calibration data table PVC for pressure calibration computing machine
pre-calibration Nin V
pre-calibration Nvoltage data table data, to PVC tables of data programmable device, high-speed D/A converters output dc voltage controlled pressure stability controller, drive peristaltic pump output pre-calibration output pressure P
pre-calibration output N, by gas circuit, to pressure measuring device gas circuit input end, pressure measuring device obtains N air pressure P
equipment output Ndata have N V one to one simultaneously
equipment output Nwith N C
equipment output coefficient Ndata, make equipment output tables of data PVC
equipment output N, then to pressure calibration computing machine by internet, Internet Server to PVC tables of data computing machine, PVC tables of data computing machine is exported tables of data PVC by equipment
equipment output Nenter pressure coefficient process database, the method for examining and determine pressure transducer according to national regulation by pressure coefficient calibrating unit, with pre-calibration data table PVC
pre-calibration Nin C
pre-calibration coefficient Ndata are to equipment output tables of data PVC
equipment output Nin C
equipment output coefficient Ndata are carried out precision verification, the trueness error value range that calibrating is obtained to sensitivity coefficient amending unit obtains the correction through sensitivity coefficient, by calibration factor amending unit, adopt least square method to try to achieve fitting a straight line, obtain pressure measuring device calibrating mathematical model, again to the device of converting pressure calibration data into data tables, the technology of application Chinese patent CN201020189756.2 " a kind of device of converting pressure calibration data into data tables " by name, starts standard pressure generator stable output calibration air pressure P
calibration N, have V one to one simultaneously
calibration Nand C
calibration factor Noutput, meet P
calibration N=V
calibration N* C
calibration factor N, wherein, P
calibration Nn calibration atmospheric pressure value of standard pressure generator output, V
calibration Nn calibration voltage value of standard pressure generator output, C
calibration factor Nn calibration factor value of high-precision pressure sensor in standard pressure generator, by P
calibration N, V
calibration N, C
calibration factor Nmake calibration data table PVC
calibration N, by calibration data table PVC
calibration Ndeposit in PVC data table stores device, then to PVC tables of data computing machine by Internet Server, internet Bonding pressure calibration calculations machine, use calibration data table PVC
calibration Nin V
calibration Nvoltage data table data, to PVC tables of data programmable device, high-speed D/A converters output dc voltage controlled pressure stability controller, drive peristaltic pump output calibration output pressure P
calibration output N, by gas circuit, to pressure measuring device gas circuit input end, pressure measuring device obtains N calibration output pressure P
calibration output Ndata have N calibration output V one to one simultaneously
calibration output Nwith N calibration output C
calibration factor output Ndata, make calibration output tables of data PVC
calibration output N, by the PVC after calibration
calibration output Nreplace PVC
n before calibrationand deposit in pressure measuring device storer, PVC tables of data computing machine is by the calibration output tables of data PVC of pressure measuring device
calibration output Ndeposit in PVC data table stores device, and generate calibration certificate and transfer to user's calibration system.(N is greater than 2 random natural number).
Described device parameter database is comprised of device parameter unit, calibration factor matching unit, precision setting unit.By the tables of data PVC before the pressure measuring device calibration of user's calibration system
n before calibrationdata and device parameter are delivered to pressure calibration computing machine, Internet Server, internet is to PVC tables of data computing machine, in device parameter database, selection is corresponding with pressure measuring device selects with matching parameter, selection step is: 1, basic parameters selection order, facility registration number of queries, tenure of use, maintenance record, equipment range rank (minute-pressure section, low pressure stage, high pressure section, UHV (ultra-high voltage) section), device measuring mode is (differential, absolute pressure formula, negative pressure transducer, positive pressure sensor), device type (Liquid Column Manometer, flexible type pressure gauge, load-type pressure gauge, electric pressure gage), conversion between various pressure units and selection, 2, calibration factor matching parameter selecting sequence, gain, intercept, pressure, voltage, temperature, frequency acquisition, 3, precision parameters selecting sequence, precision grade, precision permissible error, accuracy grade, accuracy permissible error.
Described pressure coefficient process database is examined and determine unit, sensitivity coefficient amending unit, calibration factor amending unit by pressure coefficient and is formed.PVC tables of data computing machine C
pre-calibration Nto C
equipment output Ncarry out precision verification, the trueness error value range that calibrating is obtained transfers to the correction of sensitivity coefficient amending unit through sensitivity coefficient, by calibration factor amending unit, adopt least square method to try to achieve fitting a straight line, obtain pressure measuring device calibrating mathematical model, then start standard pressure generator outputting standard air pressure to the device of converting pressure calibration data into data tables.
Described user's calibration system comprises pressure calibration computing machine, PVC tables of data programmable device, high-speed D/A converters, pressure stability controller, peristaltic pump, pressure measuring device and pressure measuring device storer.By PVC
n before calibration, PVC
in advance calibration Nbe delivered to pressure calibration computing machine with device parameter, pressure calibration computing machine sends V
pre-calibration Nto PVC tables of data programmable device, by high-speed D/A converters output dc voltage, controlled pressure stability controller drives peristaltic pump, output P
pre-calibration output Nto pressure measuring device gas circuit input end, pressure measuring device obtains N air pressure P
equipment output N, simultaneously to there being N voltage V
equipment output Nwith N coefficient C
equipment output N, be made into equipment output tables of data PVC
equipment output N; PVC
calibration Nby Internet Server, be sent to pressure calibration computing machine, V
calibration Nby PVC tables of data programmable device and high-speed D/A converters output dc voltage, controlled pressure stability controller drives peristaltic pump, output P
calibration output Nto pressure measuring device gas circuit input end, pressure measuring device obtains N calibration air pressure P
calibration output N, have N V one to one simultaneously
calibration output Nwith N C
calibration output N, make calibration output tables of data PVC
calibration output N, by the PVC after calibration
calibration output Nreplace PVC
n before calibrationand deposit in pressure measuring device storer.
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is device schematic diagram of the present invention, selects N=10.By PVC
calibrate front 10tables of data and device parameter are stored in pressure measuring device storer, and user's calibration system model is the tables of data PVC before the pressure measuring device of PSI9816 is calibrated
calibrate front 10comprise 1 with device parameter, basic parameter (facility registration number of queries, tenure of use, maintenance record, range, metering system, device type), 2, (the gain of calibration factor matching parameter, intercept, pressure, voltage, temperature, frequency acquisition), 3, precision parameters (precision grade and permissible error, accuracy grade and permissible error), being passed to model is the pressure calibration computing machine of IPC610L, internet to model is that Internet Server to the pressure calibration department model of INTEL XEON E3-1230 is the PVC tables of data computing machine of INS14RR-4P, the hard disk that enters model and be SATA3.0-Deskstar 7K4000 is selected after parameter corresponding with pressure measuring device and that mate as device parameter database, starting model is the standard pressure generator stable output pre-calibration air pressure P of CCM.P-K11
pre-calibration 10, simultaneously to there being V
pre-calibration 10and C
pre-calibration coefficient 10output, meet P
pre-calibration 10=V
pre-calibration 10* C
pre-calibration coefficient 10, wherein, P
pre-calibration 1010 atmospheric pressure values of standard pressure generator output, V
pre-calibration N10 magnitudes of voltage of standard pressure generator output, C
pre-calibration coefficient n10 coefficient values of high-precision pressure sensor in standard pressure generator, by P
pre-calibration 10, V
pre-calibration 10, C
pre-calibration coefficient 10three groups of data of pre-calibration are corresponding one by one, make pre-calibration data table PVC
pre-calibration 10, by pre-calibration data table PVC
pre-calibration 10depositing model in is in the PVC data table stores device of K9WBG08U1M, then to PVC tables of data computing machine by Internet Server to user's pressure calibration computing machine, pre-calibration data table PVC for pressure calibration computing machine
pre-calibration 10in V
pre-calibration 10voltage data table data, to PVC tables of data programmable device, high-speed D/A converters output dc voltage controlled pressure stability controller, drive peristaltic pump output pre-calibration output pressure P
pre-calibration output 10, by gas circuit, to pressure measuring device gas circuit input end, pressure measuring device obtains 10 air pressure P
equipment output 10data have 10 V one to one simultaneously
equipment output 10with 10 C
equipment output coefficient 10data, make equipment output tables of data PVC
equipment output 10, then to pressure calibration computing machine by internet, Internet Server to PVC tables of data computing machine, PVC tables of data computing machine is exported tables of data PVC by equipment
equipment output Nenter pressure coefficient process database, the method for examining and determine pressure transducer according to national regulation by pressure coefficient calibrating unit, with pre-calibration data table PVC
pre-calibration 10in C
pre-calibration coefficient 10data are to equipment output tables of data PVC
equipment output 10in C
equipment output coefficient 10data are carried out precision verification, the trueness error value range that calibrating is obtained to sensitivity coefficient amending unit obtains the correction through sensitivity coefficient, by calibration factor amending unit, adopt least square method to try to achieve fitting a straight line, obtain pressure measuring device calibrating mathematical model, again to the device of converting pressure calibration data into data tables, the technology of application Chinese patent CN201020189756.2 " a kind of device of converting pressure calibration data into data tables " by name, starts standard pressure generator stable output calibration air pressure P
calibration 10, simultaneously to there being V
calibration 10and C
calibration factor 10output, meet P
calibration 10=V
calibration 10* C
calibration factor 10, wherein, P
calibration 1010 calibration atmospheric pressure values of standard pressure generator output, V
calibration 1010 calibration voltage values of standard pressure generator output, C
calibration factor 1010 calibration factor values of high-precision pressure sensor in standard pressure generator, by P
calibration 10, V
calibration 10, C
calibration factor 10three groups of data after calibration are corresponding one by one, make calibration data table PVC
calibration 10, by calibration data table PVC
calibration 10deposit in PVC data table stores device, then to PVC tables of data computing machine by Internet Server, internet Bonding pressure calibration calculations machine, use calibration data table PVC
calibration 10in V
calibration 10voltage data table data to PVC tables of data programmable device, high-speed D/A converters output dc voltage controlled pressure stability controller drives peristaltic pump output calibration output pressure P
calibration output N, by gas circuit, to pressure measuring device gas circuit input end, pressure measuring device obtains 10 calibration output pressure P
calibration output 10data have 10 calibration output V one to one simultaneously
calibration output 10with 10 calibration output C
calibration factor output 10data, make calibration output tables of data PVC
calibration output 10, by the PVC after calibration
calibrate defeated go out 10replace PVC
calibrate front 10, depositing in pressure measuring device storer, PVC tables of data computing machine is by the calibration output tables of data PVC of pressure measuring device
calibration output Ndeposit in PVC data table stores device, and generate calibration certificate and transfer to user's calibration system.
Fig. 2 is equipment pressure coefficient process database schematic diagram, and selecting model is that the hard disk of SATA3.0-Deskstar 7K4000 is as equipment pressure coefficient process database.PVC tables of data computing machine C
pre-calibration 10to C
equipment output 10carry out precision verification, the trueness error value range that calibrating is obtained transfers to the correction of sensitivity coefficient amending unit through sensitivity coefficient, by calibration factor amending unit, adopt least square method to try to achieve fitting a straight line, obtain pressure measuring device calibrating mathematical model, then start standard pressure generator outputting standard air pressure to the device of converting pressure calibration data into data tables.
Fig. 3 is user's calibration system schematic diagram, and user's calibration system comprises: model is that the pressure calibration computing machine of 610L, the pressure measuring device that model is PSI9816, the PVC tables of data programmable device that model is XELTEK, high-speed D/A converters, the model that model is DA7885 are that PACE5000 modular pressure stability controller, model are the peristaltic pump of the ISMATEC of ISM834, the pressure measuring device storer that model is IS42S81600A-7TI.By PVC
calibrate front 10, PVC
pre-calibration 10be delivered to pressure calibration computing machine with device parameter, pressure calibration computing machine sends V
pre-calibration 10to PVC tables of data programmable device, by high-speed D/A converters output dc voltage, controlled pressure stability controller drives peristaltic pump, output P
in advance calibration output 10to pressure measuring device gas circuit input end, pressure measuring device obtains 10 air pressure P
equipment output 10, have 10 voltage V one to one simultaneously
equipment output 10with 10 coefficient C
equipment output 10, make equipment output tables of data PVC
equipment output N; PVC
calibration Nby Internet Server, be sent to pressure calibration computing machine, V
calibration Nby PVC tables of data programmable device and high-speed D/A converters output dc voltage, controlled pressure stability controller drives peristaltic pump, output P
calibration output Nto pressure measuring device gas circuit input end, pressure measuring device obtains N calibration air pressure P
calibration output N, have 10 V one to one simultaneously
calibration output 10with 10 C
calibration output 10, make calibration output tables of data PVC
calibration output 10, by the PVC after calibration
calibration output 10replace PVC
calibrate front 10, and deposit in pressure measuring device storer.
The present invention compared with prior art has following significant advantage:
1) can take out gamut scope any point PVC data from PVC tables of data calibrates pressure measuring device as calibration data.
2) first carry out pre-calibration and obtain that to carry out the data precision that accurate calibration obtains after equipment Alignment mathematical model high again.
3) saved and will be equipped with peripherals such as using nitrogen cylinder, vacuum pump, high-precision pressure controller, method is simple, with low cost, efficiency is flexible compared with high workload mode.
4) reduce calibration cost, saving a large amount of human and material resources and financial resources has huge economic benefit and social benefit.
The course of work: by tables of data PVC
n before calibrationby pressure calibration computing machine, Internet Server, be delivered to the PVC tables of data computing machine of pressure calibration department with device parameter, in access arrangement parameter database, select after the parameter of and coupling corresponding with pressure measuring device, start standard pressure generator stable output pre-calibration air pressure P
pre-calibration N, simultaneously to there being V
in advance calibration Nand C
pre-calibration coefficient Noutput, meet P
pre-calibration N=V
pre-calibration N* C
pre-calibration coefficient N, wherein, P
pre-calibration Nn pre-calibration atmospheric pressure value of standard pressure generator output, V
pre-calibration Nn pre-calibration magnitude of voltage of standard pressure generator output, C
pre-calibration coefficient Nn pre-calibration coefficient value of high-precision pressure sensor in standard pressure generator, by P
pre-calibration N, V
pre-calibration N, C
pre-calibration coefficient Nthree groups of data of pre-calibration are corresponding one by one, make pre-calibration data table PVC
pre-calibration N, by pre-calibration data table PVC
pre-calibration Ndeposit in PVC data table stores device, then to PVC tables of data computing machine by Internet Server to user's pressure calibration computing machine, pre-calibration data table PVC for pressure calibration computing machine
pre-calibration Nin V
pre-calibration Nvoltage data table data, to PVC tables of data programmable device, high-speed D/A converters output dc voltage controlled pressure stability controller, drive peristaltic pump output pre-calibration output pressure P
pre-calibration output N, by gas circuit, to pressure measuring device gas circuit input end, pressure measuring device obtains N air pressure P
equipment output Ndata have N V one to one simultaneously
equipment output Nwith N C
equipment output coefficient Ndata, make equipment output tables of data PVC
equipment output N, then to pressure calibration computing machine by Internet Server to PVC tables of data computing machine, PVC tables of data computing machine is exported tables of data PVC by equipment
equipment output Nenter pressure coefficient process database, the method for examining and determine pressure transducer according to national regulation by pressure coefficient calibrating unit, with pre-calibration data table PVC
pre-calibration Nin C
pre-calibration coefficient Ndata are to equipment output tables of data PVC
equipment output Nin C
equipment output coefficient Ndata are carried out precision verification, the trueness error value range that calibrating is obtained to sensitivity coefficient amending unit obtains the correction through sensitivity coefficient, by calibration factor amending unit, adopt least square method to try to achieve fitting a straight line, obtain pressure measuring device calibrating mathematical model, then start standard pressure generator stable output calibration air pressure P to the device of converting pressure calibration data into data tables
calibration N, simultaneously to there being V
calibration Nand C
school accurate coefficient Noutput, meet P
calibration N=V
calibration N* C
calibration factor N, wherein, P
calibration Nn calibration atmospheric pressure value of standard pressure generator output, V
calibration Nn calibration voltage value of standard pressure generator output, C
calibration factor Nn calibration factor value of high-precision pressure sensor in standard pressure generator, by P
calibration N, V
calibration N, C
calibration factor Nthree groups of data after calibration are corresponding one by one, make calibration data table PVC
calibration N, by calibration data table PVC
calibration Ndeposit in PVC data table stores device, then to PVC tables of data computing machine by Internet Server Bonding pressure calibration calculations machine, use calibration data table PVC
calibration Nin V
school accurate Nvoltage data table data to PVC tables of data programmable device, high-speed D/A converters output dc voltage controlled pressure stability controller drives peristaltic pump output calibration output pressure P
calibration output N, by gas circuit, to pressure measuring device gas circuit input end, pressure measuring device obtains N calibration output pressure P
calibration output Ndata have N calibration output V one to one simultaneously
school accurate output Nwith N calibration output C
calibration factor output Ndata, make calibration output tables of data PVC
calibration output N, by the PVC after calibration
calibration output Nreplace PVC
n before calibration, and deposit in pressure measuring device storer, PVC tables of data computing machine is by the calibration output tables of data PVC of pressure measuring device
calibration output Ndeposit in PVC data table stores device, and generate calibration certificate and transfer to user's calibration system.(N is greater than 2 random natural number).
Claims (4)
1. one kind is improved the system of pressure measuring device precision, the device, standard pressure generator, PVC data table stores device, PVC tables of data computing machine, device parameter database, pressure coefficient process database, Internet Server and M the user's calibration system that comprise converting pressure calibration data into data tables, is characterized in that: by the tables of data PVC before the M of user's calibration system pressure measuring device calibration
n before calibrationbe stored in pressure measuring device storer separately with device parameter, and by pressure calibration computing machine, Internet Server, be delivered to the PVC tables of data computing machine of pressure calibration department, in access arrangement parameter database, select the device parameter corresponding with pressure measuring device, start standard pressure generator, according to above-mentioned parameter, drive N pre-calibration air pressure P of standard pressure generator output
pre-calibration N, have N pre-calibration voltage V one to one simultaneously
pre-calibration Nwith N pre-calibration coefficient C
pre-calibration N, P
pre-calibration N=V
pre-calibration N* C
pre-calibration N, by P
pre-calibration N, V
pre-calibration N, C
pre-calibration Nmake pre-calibration data table PVC
pre-calibration N, deposit in PVC data table stores device, and by PVC tables of data computing machine, by Internet Server, transfer to user's calibration system, output pressure P
pre-calibration output Nbe applied to pressure measuring device gas circuit input end, pressure measuring device obtains N air pressure P
equipment output N, have N voltage V one to one simultaneously
equipment output Nwith N coefficient C
equipment output N, make equipment output tables of data PVC
equipment output N, by Internet Server, transfer to PVC tables of data computing machine, PVC tables of data computing machine C
pre-calibration Nto C
equipment output ncarry out precision verification, the trueness error value range that calibrating is obtained is sent to sensitivity coefficient amending unit, obtains pressure measuring device calibrating mathematical model, then exports and calibrate air pressure P to the device startup standard pressure generator of converting pressure calibration data into data tables
calibration N, have N calibration voltage V one to one simultaneously
calibration Nwith N calibration factor C
calibration factor n, P
calibration N=V
calibration N* C
calibration factor N, by P
calibration N, V
calibration N, C
calibration Nmake calibration data table PVC
calibration N, by PVC
school accurate Ndeposit in PVC data table stores device, and by Internet Server, transfer to pressure calibration computing machine by PVC tables of data computing machine, use V
calibration Ndriver output calibration output pressure P
calibration output Nby gas circuit, export pressure measuring device gas circuit input end to, pressure measuring device obtains N calibration output pressure P
calibration output N, have N calibration output voltage V one to one simultaneously
calibration output Nwith N calibration output coefficient C
calibration factor output N, by P
calibration output N, V
calibration output N, C
school accurate coefficient output Nmake calibration output tables of data PVC
calibration output N, by the tables of data PVC after calibration
calibration output Nreplacement data table PVC
n before calibration, PVC tables of data computing machine is by PVC
calibration output Ndeposit in PVC data table stores device, and generate calibration certificate and transfer to user's calibration system.
2. the system of raising pressure measuring device precision according to claim 1, it is characterized in that: described device parameter database is by basic parameter unit, calibration factor matching unit, precision setting unit composition, the trade mark enquiries numbering of basic parameter unit storage various device, tenure of use, maintenance record, range rank, device measuring mode, transformational relation between device type and various pressure unit, the gain of calibration factor matching unit storage various device, intercept, pressure, voltage, temperature, sampling rate and average sampling rate, precision setting unit storage various device precision grade and permissible error, accuracy grade and permissible error.
3. the system of raising pressure measuring device precision according to claim 1, it is characterized in that: described pressure coefficient process database is examined and determine unit, sensitivity coefficient amending unit and calibration factor amending unit by pressure coefficient and formed, PVC tables of data computing machine C
pre-calibration Nto C
equipment output Ncarry out precision verification, the trueness error value range that calibrating is obtained transfers to the correction of sensitivity coefficient amending unit through sensitivity coefficient, by calibration factor amending unit, adopt least square method to try to achieve fitting a straight line and obtain pressure measuring device calibrating mathematical model, then start standard pressure generator output pressure to the device of converting pressure calibration data into data tables.
4. the system of raising pressure measuring device precision according to claim 1, it is characterized in that: described user's calibration system comprises pressure calibration computing machine, PVC tables of data programmable device, high-speed D/A converters, pressure stability controller, peristaltic pump, pressure measuring device and pressure measuring device storer, by PVC
n before calibration, PVC
pre-calibration Nbe delivered to pressure calibration computing machine with device parameter, pressure calibration computing machine sends V
pre-calibration Nto PVC tables of data programmable device, by high-speed D/A converters output dc voltage, controlled pressure stability controller drives peristaltic pump, output P
pre-calibration is defeated go out Nto pressure measuring device gas circuit input end, pressure measuring device obtains N air pressure P
equipment output N, have N voltage V one to one simultaneously
equipment output Nwith N coefficient C
equipment output N, make equipment output tables of data PVC
equipment output N; PVC
calibration Nby Internet Server, be sent to pressure calibration computing machine, V
calibration Nby PVC tables of data programmable device and high-speed D/A converters output dc voltage, controlled pressure stability controller drives peristaltic pump, output P
calibration output Nto pressure measuring device gas circuit input end, pressure measuring device obtains N calibration air pressure P
calibration output N, simultaneously to there being N V
school accurate output Nwith N C
calibration output N, correspondence is made calibration output tables of data PVC one by one
calibration output N, by the PVC after calibration
calibration output Nreplace PVC
n before calibration, and deposit in pressure measuring device storer.
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| CN201210171177.9A CN102680170B (en) | 2012-05-29 | 2012-05-29 | System for improving accuracy of pressure measuring equipment |
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| CN201210171177.9A CN102680170B (en) | 2012-05-29 | 2012-05-29 | System for improving accuracy of pressure measuring equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103604560A (en) * | 2013-11-06 | 2014-02-26 | 苏州贝克微电子有限公司 | Pressure sensor with automatic reference |
| CN105571777A (en) * | 2015-12-23 | 2016-05-11 | 努比亚技术有限公司 | Sensitivity calibration method and device, and mobile terminal |
| CN106895868A (en) * | 2017-04-19 | 2017-06-27 | 北京同力数矿科技有限公司 | A kind of internet of things sensors equipment batch caliberating device |
| CN109253837B (en) * | 2017-07-14 | 2020-06-05 | 北京康斯特仪表科技股份有限公司 | Pressure calibration device and processing method of pressure instrument calibration information |
| WO2019011353A1 (en) * | 2017-07-14 | 2019-01-17 | 北京康斯特仪表科技股份有限公司 | Pressure calibration apparatus and pressure instrument calibration information processing method |
| CN110411645A (en) * | 2019-08-19 | 2019-11-05 | 阜阳华润电力有限公司 | A kind of pressure checking system added based on internet |
| CN110763398A (en) * | 2019-10-14 | 2020-02-07 | 湖南省计量检测研究院 | Correction method of empty box barometer |
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| CN112229566B (en) * | 2020-09-25 | 2022-04-19 | 北京康斯特仪表科技股份有限公司 | Bus pressure transmitter detection method and system |
| CN115060306B (en) * | 2022-08-16 | 2022-11-08 | 北京万维盈创科技发展有限公司 | Analog quantity calibration method and device and analog quantity acquisition equipment |
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