CN103364755B - A kind of electric energy meter power frequency magnetic field automatically scanning pilot system and test method - Google Patents
A kind of electric energy meter power frequency magnetic field automatically scanning pilot system and test method Download PDFInfo
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- CN103364755B CN103364755B CN201310307329.8A CN201310307329A CN103364755B CN 103364755 B CN103364755 B CN 103364755B CN 201310307329 A CN201310307329 A CN 201310307329A CN 103364755 B CN103364755 B CN 103364755B
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Abstract
The present invention relates to a kind of electric energy meter power frequency magnetic field automatically scanning experimental rig, pilot system and test method, wherein experimental rig includes fixed frame (1), two support shafts of coaxial line is set on fixed frame (1)（4）, two support shafts（4）Upper rolling assembling helmholtz coil winding（2）, in helmholtz coil winding（2）Two interior support shafts（4）On be fixedly connected platform（3）, platform（3）It is upper that a rotating disk is connected by rotating shaft（7）, described two support shafts（4）In a support shaft in install a drive shaft in the axial direction（10）, drive shaft（10）By speed change gear（8）Drive connection rotating disk（7）.Process of the test need not be manually operated, and automaticity is very high, solves that process of the test is cumbersome, poor reliability shortcoming, reduces labour intensity, improves operating efficiency.
Description
Technical field
The present invention relates to a kind of electric energy meter power frequency magnetic field automatically scanning experimental rig, pilot system and test method.
Background technology
Electric energy meter is by electromagnetic and mechanical（Electromechanical）Or electronic device（Electronic type）The equipment of the metering electric energy of composition.The circuit and magnetic circuit of electric energy meter are constituted under power frequency external magnetic field, additional magnetic signal and electric signal can be produced, influence the normal metering of electric energy meter.For the electric energy meter of different designs, the power frequency external magnetic field phase and angle for causing these additional magnetic signals and electric signal are completely different, and the influence to electric energy meter metering is also uncertain.National standard requirement carries out error in dipping experiment and detection under the worst phase of power frequency external magnetic field and angle effect to electric energy meter, it is ensured that the error in dipping of electric energy meter meets regulation requirement.During the design and producing of electric energy meter, and during the acceptance inspeciton of electric energy meter, above-mentioned experiment will be carried out.
System for being tested at least includes two kinds of known devices：There is equipment in electric energy meter error in dipping detection means and power frequency magnetic field.Known electric energy meter error in dipping detection means main composition is：Row energization is entered to tested electric energy meter, it is produced the power frequency supply of electric energy metrical information；Compare with the electric energy metrical information for being test for electric energy meter generation, judge the standard electric energy meter of tested electric energy meter error in dipping.There is equipment main composition in known power frequency magnetic field：The helmholtz coil of uniform magnetic field is produced in the pilot region for placing tested electric energy meter；Enter the power frequency supply of row energization to helmholtz coil.
Known testing equipment need that operating personnel's pointwise manually adjusts helmholtz coil with the position between tested electric energy meter and angle, find " worst phase and angle ", and test tested electric energy meter error now.Whole process very complicated, labour intensity is big, inefficiency, poor reliability.
The content of the invention
It is an object of the invention to provide a kind of electric energy meter power frequency magnetic field automatically scanning experimental rig, pilot system and test method, it is used to solve the problems, such as that existing electric energy meter power frequency magnetic field testing equipment automaticity is low, poor reliability.
To achieve the above object, the solution of the present invention includes：
A kind of electric energy meter power frequency magnetic field automatically scanning experimental rig, including fixed frame, two support shafts of coaxial line are set on fixed frame, rolling assembling helmholtz coil winding in two support shafts, platform is fixedly connected in two support shafts in helmholtz coil winding, a rotating disk is connected by rotating shaft on platform, a drive shaft is installed in a support shaft in described two support shafts in the axial direction, drive shaft passes through speed change gear drive connection rotating disk.
In the electric energy meter power frequency magnetic field automatically scanning experimental rig, described helmholtz coil winding is made up of two annulars and coaxial helmholtz coil winding, two helmholtz coil windings are arranged at the support shaft axis both sides symmetric position, and the support shaft axis and helmholtz coil winding annulus axis square crossing on the same plane.
In the electric energy meter power frequency magnetic field automatically scanning experimental rig, described support shaft axis is vertical with the shaft axis of rotating disk.
In the electric energy meter power frequency magnetic field automatically scanning experimental rig, by the first motor-driven rotation, described helmholtz coil winding passes through the second motor-driven rotation to described drive shaft.
A kind of electric energy meter power frequency magnetic field automatically scanning pilot system,Including computer control system,Computer control system control connection electric energy meter power frequency magnetic field automatically scanning experimental rig,The electric energy meter power frequency magnetic field automatically scanning experimental rig includes fixed frame,Two support shafts of coaxial line are set on fixed frame,Rolling assembling helmholtz coil winding in two support shafts,Platform is fixedly connected in two support shafts in helmholtz coil winding,A rotating disk is connected by rotating shaft on platform,A drive shaft is installed in the axial direction in a support shaft in described two support shafts,Drive shaft passes through speed change gear drive connection rotating disk,The computer control system is included for controlling the magnetic field excitation power control unit to helmholtz coil winding loading power frequency supply A,For controlling the electric energy meter excitation power supply control unit to electric energy meter loading power frequency supply B,Electric-motor drive unit for controlling the motor,Electric energy meter error test cell for testing the electric energy meter error.
In the electric energy meter power frequency magnetic field automatically scanning pilot system, described helmholtz coil winding is made up of two annulars and coaxial helmholtz coil winding, two helmholtz coil windings are arranged at the support shaft axis both sides symmetric position, and the support shaft axis and helmholtz coil winding annulus axis square crossing on the same plane.
In the electric energy meter power frequency magnetic field automatically scanning pilot system, described support shaft axis is vertical with the shaft axis of rotating disk.
In the electric energy meter power frequency magnetic field automatically scanning pilot system, by the first motor-driven rotation, described helmholtz coil winding passes through the second motor-driven rotation to described drive shaft.
A kind of electric energy meter power frequency magnetic field automatically scanning test method, comprises the following steps：
1）Electric energy meter to be measured is fixed on rotating disk；
2）Control system control power frequency supply A powers to helmholtz coil winding power, power frequency supply B to the electric energy meter；
3）The control system controls the helmholtz coil winding rotation, controls the rotating disk to be rotated in the vertical coil windings direction of rotation；
4）The control system gathers the electric energy meter measurement data, the electric energy meter measurement error is analyzed according to measurement data, the angle of the electric energy meter and the annulus axis of helmholtz coil winding when record measurement error is maximum, and the now phase angle between power frequency supply A and power frequency supply B.
In the electric energy meter power frequency magnetic field automatically scanning test method, the control system controls the frequency and phase of power frequency supply A by power frequency supply B, makes the Frequency Synchronization of power frequency supply A and power frequency supply B, the phase between power frequency supply A and power frequency supply B is accurately adjustable.
The beneficial effects of the invention are as follows：Helmholtz coil experimental rig can automatically control coil under the control of computer control system and be rotated with electric energy meter to be measured, the angle of adjust automatically magnetic field and electric energy meter；On the other hand, computer control system can automatically control the power supply being carried on electric energy meter and the phase angle being carried between the power supply on helmholtz coil.Electric energy meter and the worst angle position in magnetic field are automatically determined by adjusting magnetic field angle and phase angle, and electric energy meter error value now, complete experiment, process of the test need not be manually operated, automaticity is very high, cumbersome, poor reliability shortcoming is solved, labour intensity is reduced, operating efficiency is improve.
Brief description of the drawings
Fig. 1 is helmholtz coil test platform structure chart；
Fig. 2 is system control block figure.
Specific embodiment
The present invention will be further described in detail below in conjunction with the accompanying drawings.
It is as shown in Figure 1 the structure chart of helmholtz coil test platform：Helmholtz coil test platform is made up of frame 1, helmholtz coil winding 2, platform 3, coil support axle 4, coil rotary sleeve 5, coil windings connecting elements 6, rotating disk 7, speed change gear 8, motor 9, drive shaft 10.Wherein, rotating disk 7 is test for electric energy meter for fixed placement.
Helmholtz coil is that 2 coaxial annulus windings 2 are constituted, and makes its 2 annulus windings coaxial by connecting elements 6 and two circular planes keep constant spacing.Coil rotary sleeve 5 is arranged on connecting elements 6, and its axis is perpendicular through winding annulus axis and equidistant with two winding circular planes.
The platform 3 of horizontal level is installed with frame 1, the center of platform 3 is provided with rotating disk 7, and turntable shaft can turn perpendicular to horizontal plane, rotating disk 7 in the ° rotation of horizontal plane 360.The top of frame 1 fixedly mounts coil support axle 4, and its axis is horizontal；Coil rotary sleeve 5 is sleeved on coil support axle 4, can make the angle of the axis of helmholtz coil annulus winding and the plane of test platform 3 in 0-360 ° of range around 360 ° of rotations of horizontal axis.According to principles well-known, the flow direction that helmholtz coil 2 is produced under power supply excitation is consistent with the annulus winding axis of helmholtz coil, therefore, the angle of the flow direction and the tested electric energy meter plane being placed on rotating disk 7 is also in 0-360 ° of range.
By the axis of helmholtz coil annulus winding and the angle of the plane of test platform 3 in 0-360 ° of range, and rotating disk 4 is in 360 ° of combinations of rotation corner of horizontal plane, power frequency electromagnetic field required for just obtaining and the arbitrary orientation angle between being test for electric energy meter.
Motor 9 is installed, the connection drive shaft 10 of motor 9, drive shaft 10 is rotated by the driving rotating disk 7 of speed change gear 8 in frame 1；Helmholtz coil 2 is driven by another motor, speed change gear 8 is using precision drive modes such as gear and Timing Belts, motor 9 uses stepper motor with helmholtz coil motor, and use computer control system, control is driven to motor 9 and helmholtz coil motor, makes the azimuth controllable precise between helmholtz coil 2 and rotating disk 4.
It is illustrated in figure 2 the control block diagram of computer control system：Computer control system is included for controlling the electric energy meter excitation power supply control unit to electric energy meter loading power frequency supply, the electric energy meter error test cell for controlling to produce the magnetic field excitation power control unit in magnetic field, the electric-motor drive unit for controlling helmholtz coil test platform motor, judge electric energy meter error for testing.
This experimental provision electric energy meter needs power frequency synchronization motivationtheory power supply with the helmholtz coil in magnetic field is produced：The present invention constitutes power frequency synchronization motivationtheory power supply using Waveform of Numeral Compounding generation technique and electronic power amplifier technique.Helmholtz coil is encouraged by single phase industrial frequence power supply A；Electric energy meter is test for be encouraged by power frequency supply B.According to electric energy meter needs are test for, power supply B can be single phase poaer supply or three phase mains.The present invention is using the supply frequency simultaneous techniques between different electrical power, take out the frequency signal of power supply B, the frequency and phase of control power supply A, make power supply A and power supply B Frequency Synchronizations, phase between power supply A and power supply B is adjusted by computer controllable precise, so as to obtain arbitrary electrical phase angles between power frequency magnetic field and tested electric energy meter excitation power supply.
The present invention uses computer control system, the control of magnetic field orientation angle is carried out to helmholtz coil test platform, enter line frequency and phase control to the power frequency supply that the single phase industrial frequence power supply for encouraging helmholtz coil 2 is test for electric energy meter with excitation, control whole system is coordinated to complete automatically scanning experiment work.When carrying out electric energy meter performance test and quartile length working under power frequency external magnetic field, computer system is set based on the test, to the magnetic field orientation angle of helmholtz coil test platform, and the power frequency supply of excitation field is combined with the phase angle of the power frequency supply for being test for electric energy meter is encouraged, electric energy meter error is test under each azimuth phase angle combined spot of sweep test, and automatically analyze sequence, obtain power frequency external magnetic field and be test for the worst phase of electric energy meter and angle, and its electric energy metering error data, so as to realize that automatically scanning power frequency magnetic field experiment is carried out to electric energy meter.Computer control system of the invention can simultaneously control multiple helmholtz coil test platforms, and multiple electric energy meters are tested simultaneously.
Testing specific step is：
1）Electric energy meter to be measured is fixed on rotating disk；
2）Control system control power frequency supply A powers to helmholtz coil winding power, power frequency supply B to the electric energy meter；
3）Computer control system rotates according to setting, control helmholtz coil winding around the support shaft；Control rotating disk rotates around the rotating shaft of rotating disk, makes electric energy meter with helmholtz coil winding order in required each azimuth position；
4）Data of the computer control system collection in the electric energy meter measurement to be measured of each setting azimuth, electric energy meter measurement error to be measured is analyzed according to measurement data, and record measurement error it is maximum when electric energy meter to be measured and helmholtz coil winding orientation angles, and the now phase angle between power frequency supply A and power frequency supply B.
5）It is maximum in measurement error（I.e. worst orientation angles）Position carries out other experiments of national standard and code regulation.
The present invention is not required to personnel's intervention in process of the test, drastically increases operating efficiency, reduces labour intensity.
Claims (6)
1. a kind of electric energy meter power frequency magnetic field pilot system, it is characterised in that including computer control system, computer control system
Control connection electric energy meter power frequency magnetic field experimental rig, the electric energy meter power frequency magnetic field experimental rig includes fixed frame (1), fixed machine
Two support shafts (4) of setting coaxial line on frame (1), rolling assembling helmholtz coil winding (2) on two support shafts (4),
Platform (3) is fixedly connected on two support shafts (4) in helmholtz coil winding (2), rotating shaft is passed through on platform (3)
One rotating disk (7) of connection, installs a drive shaft (10) in the axial direction in a support shaft in described two support shafts (4),
Drive shaft (10) is included for controlling to conspicuous by speed change gear (8) drive connection rotating disk (7), the computer control system
The magnetic field excitation power control unit of Mu Huozi coil windings loading power frequency supply A, for controlling to load power frequency electric to the electric energy meter
The electric energy meter excitation power supply control unit of source B, the electric-motor drive unit for controlling motor, missed for testing the electric energy meter
Poor electric energy meter error test cell；Coil rotary sleeve (5) is set with described two support shafts (4).
2. a kind of electric energy meter power frequency magnetic field pilot system according to claim 1, it is characterised in that described Helmholtz
Coil windings (2) are made up of two annulars and coaxial helmholtz coil winding, and two helmholtz coil windings are arranged at
Support shaft (4) axis both sides symmetric position, and the support shaft (4) axis and helmholtz coil winding (2) circle
Ring axis square crossing on the same plane.
3. a kind of electric energy meter power frequency magnetic field pilot system according to claim 1, it is characterised in that described support shaft (4)
Axis is vertical with the shaft axis of rotating disk (7).
4. a kind of electric energy meter power frequency magnetic field pilot system according to claim 1, it is characterised in that described drive shaft (10)
By the first motor-driven rotation, described helmholtz coil winding (2) is by the second motor-driven rotation.
5. a kind of electric energy meter power frequency magnetic field test method, it is characterised in that comprise the following steps：
1) electric energy meter to be measured is fixed on rotating disk；
2) control system control power frequency supply A powers to helmholtz coil winding power, power frequency supply B to the electric energy meter；
3) control system controls the helmholtz coil winding rotation, controls the rotating disk to be revolved in the vertical coil windings
Turn direction to rotate；
4) control system gathers the electric energy meter measurement data, and the electric energy meter measurement error, note are analyzed according to measurement data
The angle of the electric energy meter and the annulus axis of helmholtz coil winding when record measurement error is maximum, and now power frequency supply
Phase angle between A and power frequency supply B.
6. a kind of electric energy meter power frequency magnetic field test method according to claim 5, it is characterised in that the control system is led to
The frequency and phase of power frequency supply B control power frequency supplies A are crossed, Frequency Synchronization, the power frequency electric of power frequency supply A and power frequency supply B is made
Phase between source A and power frequency supply B is accurately adjustable.
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| CN103728584A (en) * | 2013-10-30 | 2014-04-16 | 国家电网公司 | Method and system for detecting intelligent ammeter magnetic disturbance |
| CN103728585A (en) * | 2013-10-30 | 2014-04-16 | 国家电网公司 | Device and method for testing noise immunity of power frequency magnetic field of electric energy meter |
| CN104076322B (en) * | 2014-07-24 | 2017-01-11 | 黑龙江省电工仪器仪表工程技术研究中心有限公司 | Single-phase or three-phase electric energy meter constant magnetic field affection test device |
| CN104181497A (en) * | 2014-09-23 | 2014-12-03 | 哈尔滨电工仪表研究所 | Novel alternating-current magnetic field influence testing device |
| CN104374933B (en) * | 2014-10-28 | 2016-03-09 | 利多(香港)有限公司 | Automatic clinical chemistry analyzer |
| US10006974B2 (en) | 2015-09-22 | 2018-06-26 | Apple Inc. | Automated system for magnet quality measurements |
| CN105353599A (en) * | 2015-12-14 | 2016-02-24 | 珠海罗西尼表业有限公司 | Watch antimagnetic performance detection device |
| CN106841867A (en) * | 2017-02-04 | 2017-06-13 | 国电南瑞科技股份有限公司 | One kind is based on the phase locked tester for testing of power frequency magnetic field and method |
| CN108152783B (en) * | 2017-12-08 | 2020-03-20 | 南京南瑞继保电气有限公司 | Power frequency magnetic field immunity test method based on frequency deviation |
| CN112711186A (en) * | 2019-04-27 | 2021-04-27 | 林清贵 | Watch antimagnetic performance detection system and use method |
| WO2021237951A1 (en) * | 2020-05-29 | 2021-12-02 | 南京朗禾智能控制研究院有限公司 | Magnetic field interference testing mechanism |
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Inventor after: Wang Tianquan Inventor before: Yang Xian Inventor before: Yue Xu Inventor before: Fang Chunli Inventor before: Liu Tao Inventor before: Zuo Minzhu Inventor before: Wang Huaichao |
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Effective date of registration: 20220414 Address after: 213300 No. 39 Xianlu Road, Licheng Town, Liyang City, Changzhou City, Jiangsu Province Patentee after: JIANGSU LIYANG ELECTRONIC INSTRUMENT Co.,Ltd. Address before: 362141 No. 98, rough pit, Hengshan village, Dongqiao Town, Hui'an County, Fujian Province Patentee before: Wang Tianquan |