CN101387696B - Calibration system and method for digital alternating current-direct current tester - Google Patents
Calibration system and method for digital alternating current-direct current tester Download PDFInfo
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- CN101387696B CN101387696B CN2008101765185A CN200810176518A CN101387696B CN 101387696 B CN101387696 B CN 101387696B CN 2008101765185 A CN2008101765185 A CN 2008101765185A CN 200810176518 A CN200810176518 A CN 200810176518A CN 101387696 B CN101387696 B CN 101387696B
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Abstract
The invention discloses a correction system for digital alternative-direct current tester and a method. The correction system comprises a digital alternative-direct current tester, a standard measurer, a communication switcher and a computer, wherein the standard measurer can measure the digit alternative-direct current tester and read out a first electric parameter group; the communication switcher can obtain a first electric parameter group from the standard measurer, the computer obtains a first electric parameter group from the communication switcher, reads a second electric parameter group from the digital alternative-direct current tester, and compares the first and the second electric parameter groups to calculate the error and obtain the corrected result of the digital alternative-direct current tester. The invention can avoid the problems of the manual correction such as large error and low efficiency.
Description
Technical field
The present invention relates to the test and measuring technical field, relate in particular to a kind of calibration system and method for digital alternating current-direct current tester.
Background technology
In electric system, using a large amount of digital alternating current-direct current testers, is to guarantee to use the accurately prerequisites of measurement of these instruments to the calibration of these testers itself.
The main at present mode that adopts manual calibration; For example, when calibration JB202C (SMS Electric Co.,Ltd Zhengzhou produce alternating current-direct current instrument pick-up unit), employing be that JB202C and COM3000 (the three-phase alternating current standard meter of German ZERA company production) are connected; The artificial then output of removing to control JB202C; Remove to read the electric weight of JB202C and the electric weight of COM3000 more respectively, final manual calculation goes out error, and artificial judgment draws calibration result.Because COM3000 is an interchange standard meter, also to remove COM3000 and change 1281 numerical tables into and measure again so measure direct current, often be that a standard device will distribute and takes multiple measurements, adopt different standards at every turn, rewiring, work is complicated.
Again for example when calibration MDP303-1 (the alternating current-direct current instrument that SMS Electric Co.,Ltd Zhengzhou produces); What adopt is that MDP303-1, COM3000, DZ603 (AC power) are connected; Manual work goes to control DZ603 output then; Remove to read the electric weight of MDP303-1 and the electric weight of COM3000 more respectively, final manual calculation goes out error, obtains calibration result.
There is big, the inefficient problem of error in the method for existing manual calibration digital alternating current-direct current tester.
Summary of the invention
In view of this, the present invention provides a kind of calibration system and method for digital alternating current-direct current tester, to solve big, the inefficient problem of error that the prior art manual calibration exists.
For this reason, the embodiment of the invention adopts following technical scheme:
A kind of calibration system of digital alternating current-direct current tester; The canonical measure equipment that comprise digital alternating current-direct current tester, is connected with digital alternating current-direct current tester; Also comprise the communication switching device that is connected with canonical measure equipment, and the computing machine that is connected with the communication switching device with digital alternating current-direct current tester; Said canonical measure equipment is used to measure said digital alternating current-direct current tester, reads first group of electric parameter; Said communication switching device is used for obtaining first group of electric parameter from said canonical measure equipment; Said computing machine is used for obtaining first group of electric parameter from said communication switching device, simultaneously; Read second group of electric parameter from digital alternating current-direct current tester; And be responsible for relatively first group of electric parameter and second group of electric parameter, and calculate error, draw the calibration result of digital alternating current-direct current tester;
Wherein, Said canonical measure equipment comprises three-phase alternating current standard device and blow-up direct current standard device; Wherein, The three-phase alternating current standard device is used to measure the ac parameter of digital alternating current-direct current tester, and blow-up direct current standard device is used to measure the ac parameter of digital alternating current-direct current tester, and remedies three-phase alternating current standard device of ac limit and accuracy.
Also comprise the power-supply device that is connected with said digital alternating current-direct current tester, this power-supply device is used for to digital alternating current-direct current tester power of alterating and direct current being provided.
Said communication switching device and blow-up direct current standard device are through parallel port communication, pass through serial communication with three-phase alternating current standard device, power-supply device and computing machine; Said computing machine and digital alternating current-direct current tester pass through serial communication.
Said communication switching device comprises relay instrument communication control chip.
A kind of calibration steps of digital alternating current-direct current tester; Said digital alternating current-direct current tester is connected with computing machine; And, said computing machine and the canonical measure devices communicating that is connected in digital alternating current-direct current tester, this method comprises: computing machine obtains first group of electric parameter that the said digital alternating current-direct current tester of said canonical measure testing of equipment draws; Simultaneously, read second group of electric parameter of digital alternating current-direct current tester; Said computing machine compares said first group of electric parameter and second group of electric parameter, calculates error, draws calibration result;
Wherein, Said canonical measure equipment comprises three-phase alternating current standard device and blow-up direct current standard device; Wherein, The three-phase alternating current standard device is used to measure the ac parameter of digital alternating current-direct current tester, and blow-up direct current standard device is used to measure the alterating and direct current parameter of digital alternating current-direct current tester, and remedies three-phase alternating current standard device of ac limit and accuracy.
Also comprise: add three-phase alternating current precision measurement power supply and single-phase DC precision measurement power supply to said digital alternating current-direct current tester.
Said electric parameter comprises voltage, electric current, power, phase place, or/and, frequency.
Also comprise: the calibration parameter through the said digital alternating current-direct current tester of said computer control, comprise, voltage is set or/and the electric current gear.
It is thus clear that as long as the scheme of automatic calibration digital alternating current-direct current tester provided by the invention is primary connection; Handoff procedure is accomplished by computer controlled automatic; Realized the robotization of calibration process, and calibration result is handled automatically by computing machine; Automatically whole to dataization, reduced the error of manually-operated and calculating.
Description of drawings
Fig. 1 is the calibration system synoptic diagram of digital alternating current-direct current tester of the present invention;
Fig. 2 is the calibration system synoptic diagram of embodiment of the invention digital alternating current-direct current tester;
Fig. 3 is the calibration steps process flow diagram of digital alternating current-direct current tester of the present invention;
Fig. 4 is the inventive method embodiment one process flow diagram;
Fig. 5 is the inventive method embodiment two process flow diagrams.
Embodiment
Those skilled in the art understand; Most of digital alternating current-direct current tester standard device all has and compunication and automatic control function; The standard device that newly dispatches from the factory has basically all had automatic control function, and along with science and technology development, the automatic control level of standard device is more and more universal; But the work of at present these standard devices being calibrated does not also make full use of automatic control function, does not also integrate various automation equipments.Reason is that these equipment are all from different manufacturers, and computer communication protocol has nothing in common with each other; Electrical specification also is not quite similar, and especially standard device is of a great variety especially, and not only each producer is different; And also there is the product of different model in same producer; Even the product of same model, owing to reasons such as product improvements, also maybe be different.
The present invention integrates various digital alternating current-direct current testers exactly, and the communication protocol of various device is integrated in the computing machine, is controlled automatically by computing machine, accomplishes calibration operation.
Referring to Fig. 1; Calibration system synoptic diagram for digital alternating current-direct current tester of the present invention; This system comprises digital alternating current-direct current tester to be calibrated 101 (equipment to be calibrated), three-phase alternating current standard device 102, single-phase AC standard device 103, communication switching device 104 and computing machine 105; In addition, can also comprise power-supply device 106.Wherein, three-phase alternating current standard device 102 is referred to as canonical measure equipment with blow-up direct current standard device 103.
For system provided by the invention, comprise test instrumentation mode of operation and proving installation mode of operation, the two difference is; Under the proving installation mode of operation; System can not comprise power-supply device 106, and the testing power supply that system uses digital alternating current-direct current tester 101 inside to carry is for the test instrumentation mode of operation; System need comprise power-supply device 106, is the system calibration power supply through power-supply device 106.
With the test instrumentation mode of operation system shown in Figure 1 is described in detail below.
Can know from Fig. 1; Digital alternating current-direct current tester 101 1 ends are connected in power-supply device 106;, for providing power supply, the calibration of digital alternating current-direct current tester 101 particularly, comprises AC power electric current, the big voltage of direct current, direct current small voltage, D.C. high-current and DC low current are provided by power-supply device 106; Digital alternating current-direct current tester 101 other ends are connected with computing machine 105, by the startup and the end of computing machine 105 control calibrations.In practical application, digital alternating current-direct current tester 101 can comprise the tester of various manufacturer production, for example CL317 and MDP303-1 etc.
Three-phase alternating current standard device 102 1 ends are connected in power-supply device 106; Mainly be used for measuring alternating voltage, electric current, power, phase place and frequency; The other end of three-phase alternating current standard device 102 is connected in communication switching device 104, test result is sent by communication switching device 104 send computing machine 105 to.In practical application, three-phase alternating current standard device 102 can adopt the reference instrument of various manufacturer production, for example COM3000 etc.
Blow-up direct current standard device 103 1 ends are connected in power-supply device 106; Mainly be used for measuring interchange, direct current and resistance; Wherein AC portion mainly is the deficiency that remedies three-phase alternating current standard device 102 amount limits and accuracy; The other end of individual event alternating current-direct current standard device 103 is connected in communication switching device 104, and measurement result is sent to computing machine 105 by communication switching device 104.In practical application, blow-up direct current standard device 103 can adopt the reference instrument of various manufacturer production, for example 8508A etc.
Introduce a specific embodiment of the calibration system of digital alternating current-direct current tester below.
Referring to Fig. 2, be this embodiment synoptic diagram.Total system comprises by school instrument 201, by calibration device 202, handover module 203, main control module 204, three-phase alternating current precision measurement power supply 205, single-phase DC precision measurement power supply 206, COM3000 equipment 207,8508A equipment 208 and PC 209.
Wherein, Be meant that by school instrument 201 system is in the digital alternating current-direct current tester that is calibrated under the test instrumentation mode of operation; And be meant that by calibration device 202 system is in the digital alternating current-direct current tester that is calibrated under the proving installation mode of operation; Under the proving installation mode of operation, three-phase alternating current precision measurement power supply 205, single-phase DC precision measurement power supply 206 can omit.Handover module 203 and the main control module 204 common functions of accomplishing the switching device 104 of communicating by letter among Fig. 1.
" U " expression voltage shown in Fig. 2, " I " representes electric current, main control module 204 is passed through and port communications with 8508A equipment; Preferably with the IEEE488 protocol communication; Main control module 204 is all passed through serial communication with handover module 203, three-phase alternating current precision measurement power supply 205, single-phase DC precision measurement power supply 206 and PC 209, for example with the RS232 protocol communication, in addition; PC 209 with by school instrument 201 or with by calibration device 202 also through serial communication, for example with the RS232 protocol communication.
The course of work of system shown in Figure 2 is: started by school instrument 201 or by the calibration process of calibration device 202 by PC 209; And read by school instrument 201 or by the various electric parameters of calibration device 202; Simultaneously; Main control module 204 readout sign locating tab assembly equipment (COM3000 equipment 207 and 8508A equipment 208) are measured by school instrument 201 or by the various electric parameters of calibration device 202, and these electric parameters are uploaded to PC 209; PC will calculate by school instrument 201 or by the error condition of calibration device 202 from comparing, handle by school instrument 201 or by calibration device 202 data that read and the data of obtaining from main control module 204, draws calibration result.
It is thus clear that; Calibration system provided by the invention has effectively been utilized digital alternating current-direct current tester and compunication and automatic control function; Whole process through the computer control calibration; And read by the electric parameter of the electric parameter of school instrument and standard device by computing machine, and draw calibration result by two groups of data of computing machine comparison, avoided manual calibration problem, the problem includes: the big problem of inefficiency, error.
Corresponding with said system, the present invention also provides a kind of calibration steps of digital alternating current-direct current tester, referring to Fig. 3, is this method flow diagram, comprising:
S301: computing machine obtains first group of electric parameter that the said digital alternating current-direct current tester of said canonical measure testing of equipment draws, and simultaneously, reads second group of electric parameter of digital alternating current-direct current tester;
S302: computing machine compares said first group of electric parameter and second group of electric parameter, calculates error, draws calibration result.
Wherein, first group of electric parameter and second group of electric parameter include but not limited to voltage, electric current, power, phase place and frequency.
Preferably, this method also comprises: add three-phase alternating current precision measurement power supply and single-phase DC precision measurement power supply to said digital alternating current-direct current tester.
In addition, this method also can comprise: the calibration parameter through the said digital alternating current-direct current tester of said computer control, comprise, and voltage is set or/and the electric current gear.
Wherein, Said canonical measure equipment comprises three-phase alternating current standard device and blow-up direct current standard device; Wherein, The three-phase alternating current standard device is used to measure the alterating and direct current parameter of digital alternating current-direct current tester, and blow-up direct current standard device is used to measure the ac parameter of digital alternating current-direct current tester, and remedies three-phase alternating current standard device of ac limit and accuracy.
Below respectively with regard under the test instrumentation mode of operation with the proving installation mode of operation under method describe.
Method embodiment one: the calibration steps of the digital alternating current-direct current tester under the test instrumentation mode of operation.
Referring to Fig. 4, be method embodiment one process flow diagram, comprising:
S401: start calibration;
S402: seek test point,, carry out S403 if find test point, otherwise, carry out S415;
S403: judge whether the test point setting is reasonable,, then carry out S404, otherwise carry out S415 if be provided with rationally;
S404: whether judge test pattern, standard with current identical, if, carry out S405, otherwise, S415 carried out;
S405: judge whether the wiring voltage, the electric current that are provided be identical with current power supply, if, carry out S406, otherwise, S407 carried out;
S406: soft powering up (phase frequency is set), stablized 8 seconds; Carry out S410 then
S407: fall electricity and stablized 5 seconds;
S408: be provided with by the school instrument mode of connection, electric current and voltage gear;
S409: power up (wiring voltage, electric current, phase place and frequency are set) firmly, stablized 10 seconds;
S410: the first group of electric parameter that reads canonical measure equipment;
S411: whether successfully to read by second group of electric parameter of school instrument, if, carry out S412, otherwise, S415 carried out;
S412: first group of electric parameter and second group of electric parameter are compared, calculate and preserve, draw error, obtain calibration result;
Does S413: whether single-point circulate? If, carry out S414, otherwise, return and carry out S402;
S414: wait for 2 seconds, return then and carry out S411;
S415: withdraw from.
Method embodiment two: the calibration steps of the digital alternating current-direct current tester under the proving installation mode of operation.
Referring to Fig. 5, be method embodiment two process flow diagrams, comprising:
S501: start calibration;
S502: seek test point,, carry out S503 if find test point, otherwise, carry out S514;
S503: judge whether the test point setting is reasonable,, then carry out S504, otherwise carry out S514 if be provided with rationally;
S504: whether judge test pattern, standard with current identical, if, carry out S505, otherwise, S514 carried out;
S505: wiring, voltage, current parameters value that notice canonical measure equipment is about to be provided with;
S506: fall electricity and stablized 5 seconds;
S507: be provided with by the calibration device mode of connection, electric current and voltage gear;
S508: power up (wiring voltage, electric current, phase place and frequency are set) firmly, stablized 10 seconds;
S509: the first group of electric parameter that reads canonical measure equipment;
S510: whether successfully to read by second group of electric parameter of calibration device, if, carry out S511, otherwise, S514 carried out;
S511: first group of electric parameter and second group of electric parameter are compared, calculate and preserve, draw error, obtain calibration result;
Does S512: whether single-point circulate? If, carry out S513, otherwise, return and carry out S502;
S513: wait for 2 seconds, return then and carry out S510;
S514: withdraw from.
The scheme of automatic calibration digital alternating current-direct current tester provided by the invention, as long as primary connection, handoff procedure is accomplished by computer controlled automatic; Realized the robotization of calibration process, and calibration result is handled automatically by computing machine; Automatically whole to dataization, reduced the error of manually-operated and calculating, further; Also can judge whether to satisfy the requirement of calibration through computing machine automatically, also can create calibration certificate automatically.
One of ordinary skill in the art will appreciate that; The process of the method for realization the foregoing description can be accomplished through the relevant hardware of programmed instruction; Described program can be stored in the read/write memory medium, and this program when carrying out the corresponding step in the said method.Described storage medium can be like ROM/RAM, magnetic disc, CD etc.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (8)
1. the calibration system of a digital alternating current-direct current tester; The canonical measure equipment that comprise digital alternating current-direct current tester, is connected with digital alternating current-direct current tester; It is characterized in that; Also comprise the communication switching device that is connected with canonical measure equipment, and the computing machine that is connected with the communication switching device with digital alternating current-direct current tester;
Said canonical measure equipment is used to measure said digital alternating current-direct current tester, reads first group of electric parameter;
Said communication switching device is used for obtaining first group of electric parameter from said canonical measure equipment;
Said computing machine is used for obtaining first group of electric parameter from said communication switching device, simultaneously; Read second group of electric parameter from digital alternating current-direct current tester; And be responsible for relatively first group of electric parameter and second group of electric parameter, and calculate error, draw the calibration result of digital alternating current-direct current tester;
Wherein, Said canonical measure equipment comprises three-phase alternating current standard device and blow-up direct current standard device; Wherein, The three-phase alternating current standard device is used to measure the ac parameter of digital alternating current-direct current tester, and blow-up direct current standard device is used to measure the ac parameter of digital alternating current-direct current tester, and remedies three-phase alternating current standard device of ac limit and accuracy.
2. according to the said system of claim 1, it is characterized in that also comprise the power-supply device that is connected with said digital alternating current-direct current tester, this power-supply device is used for to digital alternating current-direct current tester power of alterating and direct current being provided.
3. according to the said system of claim 1, it is characterized in that said communication switching device and blow-up direct current standard device are through parallel port communication, pass through serial communication with three-phase alternating current standard device, power-supply device and computing machine; Said computing machine and digital alternating current-direct current tester pass through serial communication.
4. according to the said system of claim 1, it is characterized in that said communication switching device comprises relay instrument communication control chip.
5. the calibration steps of a digital alternating current-direct current tester is characterized in that, said digital alternating current-direct current tester is connected with computing machine, and, said computing machine and the canonical measure devices communicating that is connected in digital alternating current-direct current tester, this method comprises:
Computing machine obtains first group of electric parameter that the said digital alternating current-direct current tester of said canonical measure testing of equipment draws, and simultaneously, reads second group of electric parameter of digital alternating current-direct current tester;
Said computing machine compares said first group of electric parameter and second group of electric parameter, calculates error, draws calibration result;
Wherein, Said canonical measure equipment comprises three-phase alternating current standard device and blow-up direct current standard device; Wherein, The three-phase alternating current standard device is used to measure the ac parameter of digital alternating current-direct current tester, and blow-up direct current standard device is used to measure the alterating and direct current parameter of digital alternating current-direct current tester, and remedies three-phase alternating current standard device of ac limit and accuracy.
6. according to the said method of claim 5, it is characterized in that, also comprise:
Add three-phase alternating current precision measurement power supply and single-phase DC precision measurement power supply to said digital alternating current-direct current tester.
7. according to the said method of claim 5, it is characterized in that said electric parameter comprises voltage, electric current, power, phase place, or/and, frequency.
8. according to the said method of claim 5, it is characterized in that, also comprise:
Calibration parameter through the said digital alternating current-direct current tester of said computer control comprises, voltage is set or/and the electric current gear.
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| CN102135608A (en) * | 2011-01-29 | 2011-07-27 | 四川电力科学研究院 | Electric energy metering and monitoring system of intelligent gateway |
| CN103616655A (en) * | 2013-12-10 | 2014-03-05 | 河池市计量测试研究所 | Method and equipment for calibrating medical diagnostic X-ray radiation source tube current measuring instrument |
| CN106154075B (en) * | 2015-04-14 | 2021-07-27 | 致茂电子(苏州)有限公司 | Automatic checking system and method |
| CN108447241B (en) * | 2018-03-30 | 2020-05-08 | 王海霞 | Medical equipment signal transmission calibrating device |
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| US20080129279A1 (en) * | 2006-12-04 | 2008-06-05 | Fluke Corporation | Voltage measurement instrument and method having improved automatic mode operation |
| CN201285438Y (en) * | 2008-11-07 | 2009-08-05 | 河南电力试验研究院 | Calibration system for digital AC/DC test instrument |
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Patent Citations (5)
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|---|---|---|---|---|
| US5311125A (en) * | 1992-03-18 | 1994-05-10 | Lake Shore Cryotronics, Inc. | Magnetic property characterization system employing a single sensing coil arrangement to measure AC susceptibility and DC moment of a sample |
| CN1317775A (en) * | 2000-04-11 | 2001-10-17 | 时志成 | Control method and device for very large-display screen composed of LEDs |
| CN2812400Y (en) * | 2005-07-27 | 2006-08-30 | 李世泽 | Distributed SCM test control inversion system for digital variable frequency generator set |
| US20080129279A1 (en) * | 2006-12-04 | 2008-06-05 | Fluke Corporation | Voltage measurement instrument and method having improved automatic mode operation |
| CN201285438Y (en) * | 2008-11-07 | 2009-08-05 | 河南电力试验研究院 | Calibration system for digital AC/DC test instrument |
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