CN207689656U - A kind of multi-epitope direct-current electric energy meter calibrating device - Google Patents
A kind of multi-epitope direct-current electric energy meter calibrating device Download PDFInfo
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- CN207689656U CN207689656U CN201820045395.0U CN201820045395U CN207689656U CN 207689656 U CN207689656 U CN 207689656U CN 201820045395 U CN201820045395 U CN 201820045395U CN 207689656 U CN207689656 U CN 207689656U
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Abstract
The utility model provides a kind of multi-epitope direct-current electric energy meter calibrating device, including：Calibration power source, checklist platform and error checking unit；The calibration power source includes：Mutually isolated multiple direct voltage sources, DC current source and power source electrical energy measurement unit.In the utility model, it is transmitted to error checking unit by the output power of power source electrical energy measurement unit measurement criteria power source and by output pulse, the power source electrical energy measurement unit and the direct current energy meter are connected by error checking unit, it can complete direct current energy meter calibrating, and, multiple direct voltage sources on the checklist platform multiple direct current energy meters correspond and it is in parallel, it is mutually isolated between multiple direct voltage sources, to make to be completely independent per power output all the way, it does not interfere with each other, multi-epitope direct current energy meter is solved when calibrating since there are current loops between two epitopes, the technical problem for causing current measurement inaccurate.
Description
Technical field
The utility model is related to electric energy Calibration Technology field more particularly to a kind of multi-epitope direct-current electric energy meter calibrating devices.
Background technology
The application field of direct current energy meter is very extensive, such as electric vehicle direct current charging and conversion electric, photovoltaic generation, communication base
It stands, DC traction system.Fair and just property based on metering, in these direct current electrical domains, DC measurement is inevitable choice, electricity
The calibration operation of energy table is to ensure that electric energy metering device accurately ensures, with the quick hair of electric vehicle and generation of electricity by new energy
Exhibition, direct current energy meter Quick calibration device market potential are huge.
Since the electric current of conventional AC electric energy meter is by sensor sampling current, voltage is directly inputted into electric energy meter, electricity
What pressure and electric current were mutually isolated for electric energy meter, therefore traditional single phase electric energy meter only needs the voltage being isolated all the way, electricity
Stream, you can realize the calibrating of the electric energy meter of multi-epitope；The sensor of traditional electric energy meter can only be directed to exchange sampling, can not sample
DC current, although can also be sampled to voltage by Zero flux mutual inductor, Zero flux mutual inductance with high accuracy
Device is of high cost, easily by external interference, is not suitable for the more complicated occasion of application environment, therefore for direct current energy meter, for
Cost, reliability consider, the sampling of general direct current energy meter be all directly or indirectly (herein directly refer to current divider it is built-in,
Refer to indirectly that current divider is external) it is realized by current divider.In view of the particularity of direct current energy meter sampling, the voltage electricity of electric energy meter
Stream input is not isolated, and mutually isolated voltage and current is not isolated after accessing electric energy meter, but for multi-epitope, electricity
Pressure or electric current will necessarily because of between two epitopes voltage and connect there are current loop, cause current measurement inaccurate.
Therefore, multi-epitope direct current energy meter leads to electricity since there are current loops between two epitopes when calibrating
Flow measurement is not allowed to be those skilled in the art's technical issues that need to address.
Utility model content
The utility model discloses a kind of multi-epitope direct-current electric energy meter calibrating devices, for solving multi-epitope direct current energy meter
Technical problem when calibrating due to there are current loop, causing current measurement inaccurate between two epitopes.
The utility model provides a kind of multi-epitope direct-current electric energy meter calibrating device, including：Calibration power source, checklist platform
And error checking unit；
The calibration power source includes：Mutually isolated multiple direct voltage sources, DC current source and power source electric energy meter
Measure unit；
The multiple direct voltage source on the checklist platform multiple direct current energy meters correspond and it is in parallel；
The DC current source is connect with the direct current energy meter, for providing electric current for the direct current energy meter；
The direct voltage source and the DC current source are also connected with the power source electrical energy measurement unit, the power source
Electrical energy measurement unit is used to measure the output electricity in the virtual power circuit of the direct voltage source and DC current source composition
Energy；
Electrical energy measurement formula is：
P=∫ UIdt；
Wherein U is the voltage of direct voltage source, and I is the output current of DC current source.
The voltage acquisition circuit and current acquisition circuit of the power source electrical energy measurement unit are respectively used to measure described straight
The electric energy of galvanic electricity potential source and DC current source acquires its voltage signal and current signal；
Specifically, voltage acquisition circuit and current acquisition circuit use the Hall sensor of Zero flux, it is possible to reduce to surveying
Measure the influence in circuit.
The error checking unit connects the power source electrical energy measurement unit and the direct current energy meter, for comparing
State the output pulse of the output pulse and the direct current energy meter in calibration power source.
Preferably, the calibration power source further includes current divider analog source；
The current input terminal of the current divider analog source connection direct current energy meter, for analog DC source through excessive
Flow the voltage signal after device.
Preferably, the current input terminal mouth connection DC current source or current divider analog source of DC ammeter.
Preferably,
When the direct current energy meter is current divider internally-arranged type, the DC current source specifically with it is multiple be built in it is described straight
Flow the current divider series connection of electric energy meter；
Or
When the direct current energy meter is current divider externally positioned type, the DC current source and it is placed outside the direct current energy meter
Current divider series connection, for by current divider signal it is in parallel with the direct current energy meter；
Or
When the direct current energy meter is current divider externally positioned type, the DC current source and the current divider analog source string
Connection, the current divider analog source is in parallel with the direct current energy meter, for replacing DC current source and current divider.
Preferably, multiple epitopes are provided on the checklist platform；
The structure of the epitope is corresponding with the direct current energy meter structure, for installing the direct current energy meter；
4 piece-root grafting line contact pins are provided in the epitope, it is corresponding with the patch jack on the direct current energy meter.
Preferably, it is provided with fixing lock in the epitope；
The fixing lock is the object block moved back and forth, corresponding with the groove on the direct current energy meter, for locking installation
In the direct current energy meter of the epitope.
Preferably, the direct voltage source and the DC current source are especially by the wiring contact pin in the epitope
It is connect with the direct current energy meter.
Preferably, the main control chip of the error checking unit is specially arbitrary group of microcontroller, ARM, DSP or industrial personal computer
It closes.
Preferably, the DC current source is specifically connected with multiple direct current energy meters.
Preferably, the current input terminal mouth of the direct current energy meter is in parallel with the output port of a standard shunt；
The DC current source connects the standard shunt.
Preferably, the DC current source specifically connects the input port of the current divider analog source；
The output port of the current divider analog source corresponds and in parallel with the direct current energy meter, for by more
Electric current after a output port difference output steering is to the direct current energy meter.
Preferably, the power source electrical energy measurement unit include microprocessor, electric energy detection unit, electric energy display unit and
485 pulse output end mouths；
The microprocessor be separately connected the microprocessor, the electric energy detection unit, the electric energy display unit and
The 485 pulse output end mouth；
The electric energy detection unit connects the direct voltage source and the DC current source；
The electric energy display unit is for showing energy data；
The 485 pulse output end mouth is for exporting pulse.
As can be seen from the above technical solutions, the utility model has the following advantages：
The utility model provides a kind of multi-epitope direct-current electric energy meter calibrating device, including：Calibration power source, checklist platform
And error checking unit；The calibration power source includes：Mutually isolated multiple direct voltage sources, DC current source and power source
Electrical energy measurement unit；Multiple direct current energy meters on the multiple direct voltage source and the checklist platform correspond and simultaneously
Connection；The DC current source is connect with the direct current energy meter, for providing electric current for the direct current energy meter；The direct current
Potential source and the DC current source are also connected with the power source electrical energy measurement unit, and the power source electrical energy measurement unit is based on
Measure the output electric energy of the direct voltage source and the DC current source；The error checking unit connects the power source electric energy
Metering units and the direct current energy meter, for the calibration power source output pulse and the direct current energy meter it is defeated
Go out pulse.In the utility model, the output pulse in calibration power source is received by power source electrical energy measurement unit and is transmitted to mistake
Poor verification unit connects the power source electrical energy measurement unit and the direct current energy meter by error checking unit, can be complete
It is examined and determine at direct current energy meter, also, multiple direct voltage sources are corresponded with multiple direct current energy meters on the checklist platform
And it is in parallel, it is mutually isolated between multiple direct voltage sources, to make to be completely independent per power output all the way, it does not interfere with each other, avoids
Voltage indeterminacy situation caused by voltage is not isolated solves multi-epitope direct current energy meter when calibrating due to two tables
There are current loop between position, the technical problem for causing current measurement inaccurate.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, before not making the creative labor property
It puts, can also be obtained according to these attached drawings other attached drawings.
Fig. 1 provides a kind of signal of one embodiment of multi-epitope direct-current electric energy meter calibrating device for the utility model
Figure；
Fig. 2 provides a kind of signal of second embodiment of multi-epitope direct-current electric energy meter calibrating device for the utility model
Figure；
Fig. 3 provides a kind of signal of the third embodiment of multi-epitope direct-current electric energy meter calibrating device for the utility model
Figure；
Wherein, reference numeral is as follows：
1, calibration power source；2, checklist platform；3, error checking unit；101, direct voltage source；102, DC current source；
103, power source electrical energy measurement unit；104, current divider analog source；105, standard shunt.
Specific implementation mode
The utility model discloses a kind of multi-epitope direct-current electric energy meter calibrating devices, for solving multi-epitope direct current energy meter
Technical problem when calibrating due to there are current loop, causing current measurement inaccurate between two epitopes.
Referring to Fig. 1, the utility model provides a kind of one embodiment of multi-epitope direct-current electric energy meter calibrating device,
Including：Calibration power source 1, checklist platform 2 and error checking unit 3；
Calibration power source 1 includes：Mutually isolated multiple direct voltage sources 101, DC current source 102 and power source electric energy
Metering units 103；
Multiple direct voltage sources 101 on checklist platform 2 multiple direct current energy meters correspond and it is in parallel；
DC current source 102 is connect with direct current energy meter, for providing electric current for direct current energy meter；
Direct voltage source 101 and DC current source 102 are also connected with power source electrical energy measurement unit 103, power source electric energy meter
Amount unit 103 is used to measure the output electric energy in the virtual power circuit that direct voltage source 101 and DC current source 102 form；
Electrical energy measurement formula is：
P=∫ UIdt；
Wherein U is the voltage of direct voltage source 101, and I is the output current of DC current source 102.
Error checking unit 3 connects power source electrical energy measurement unit 103 and direct current energy meter, is used for standard of comparison power source
The output pulse of 1 output pulse and direct current energy meter.
In the utility model, the output pulse in calibration power source 1 is received by power source electrical energy measurement unit and is transmitted to
Error checking unit 3 connects the power source electrical energy measurement unit and the direct current energy meter, just by error checking unit 3
It can complete direct current energy meter calibrating, also, multiple direct voltage sources 101 and multiple direct current energy meters on the checklist platform 2
It corresponds and in parallel, it is mutually isolated between multiple direct voltage sources 101, to make to be completely independent per power output all the way, mutually
Do not interfere, avoid voltage indeterminacy situation caused by voltage is not isolated, solve multi-epitope direct current energy meter calibrating when
Wait the technical problem due to there are current loop, causing current measurement inaccurate between two epitopes.
Further, calibration power source 1 further includes current divider analog source 104；
Current divider analog source 104 connects the current input terminal of direct current energy meter, for analog DC source through excessive
Flow the voltage signal after device.The current input terminal mouth connection DC current source or current divider analog source of DC ammeter.
Further, the voltage acquisition circuit of power source electrical energy measurement unit 103 and current acquisition circuit are respectively used to survey
Measure the electric energy of direct voltage source 101 and DC current source 102, collection voltages signal and current signal；
Specifically, voltage acquisition circuit and current acquisition circuit use the Hall sensor of Zero flux, it is possible to reduce to surveying
Measure the influence in circuit.
Error checking unit 3 connects power source electrical energy measurement unit 103 and direct current energy meter, is used for standard of comparison power source
The output pulse of 1 output pulse and direct current energy meter.
Further, multiple epitopes are provided on checklist platform 2；
The structure of epitope is corresponding with direct current energy meter structure, for installing direct current energy meter；The structure and direct current of epitope
If energy table structure correspondence refers to that direct current energy meter is square, the groove of epitope setting square, if direct current energy meter is three
Angular, then the groove of triangle is arranged in epitope；
4 piece-root grafting line contact pins are provided in epitope, it is corresponding with the patch jack on direct current energy meter.
Further, it is provided with fixing lock in epitope；
Fixing lock is the object block moved back and forth, corresponding with the groove on direct current energy meter, for locking mounted on epitope
Direct current energy meter.
Further, direct voltage source 101 and DC current source 102 are especially by the wiring contact pin and direct current in epitope
It can table connection.
Further, the main control chip of error checking unit 3 is specially arbitrary group of microcontroller, ARM, DSP or industrial personal computer
It closes.Can be microcontroller and the combination of ARM that is, the main control chip of error checking unit 3 can be microcontroller, can be ARM,
Can be the combination of microcontroller, ARM and DSP, and so on.
Further, power source electrical energy measurement unit 103 includes microprocessor, electric energy detection unit, electric energy display unit
With 485 pulse output end mouths；
Microprocessor is separately connected microprocessor, electric energy detection unit, electric energy display unit and 485 pulse output end mouths；
Electric energy detection unit connects direct voltage source 101 and DC current source 102；
Electric energy display unit is for showing energy data；
485 pulse output end mouths are for exporting pulse.
Multi-epitope direct-current electric energy meter calibrating device is made of calibration power source 1, checklist platform 2 and error checking unit 3.
Wherein calibration power source 1 is by mutually independent multiple direct voltage sources 101, DC current sources 102, a Yi Jiyi
A current divider analog source 104, power source electrical energy measurement unit 103 are constituted, and power source electrical energy measurement unit 103 is shown containing electric energy
Unit and 485 pulse output end mouths.It is constituted per road direct voltage source 101 and DC current source 102 or current divider analog source 104
Power output all the way, power source electrical energy measurement unit 103 to every road power output carry out electrical energy measurement, and carry out electric energy show and
485 pulses export.
The characteristics of calibration power source 1, is that each road direct voltage source 101 is mutually isolated, complete per power output all the way to make
It is complete independent, it does not interfere with each other.
Checklist platform 2 is used for Fast Installation direct current energy meter, and each epitope includes 4 piece-root grafting line contact pins and fixing lock, directly
Stream electric energy meter, which is fixed in epitope, can be completed wiring.The epitope of checklist platform 2 and the voltage source one in calibration power source 1 are a pair of
It answers.
Error checking unit 3 is used to judge that the measurement error of the electric energy meter of each epitope, error checking unit 3 to be respectively connected to mark
The pulse of the pulse of quasi- power source 1 and tested electric energy meter judges measurement error according to pulse.
The characteristics of error checking unit 3 be main control chip be microcontroller, ARM, DSP or one of which in industrial personal computer or
It is a variety of.
Further, the connection about DC current source 102 and direct current energy meter, there are three types of modes, specially：
When direct current energy meter is current divider internally-arranged type, DC current source 101 is specifically built in direct current energy meter with multiple
Current divider series connection；
Or
When direct current energy meter be current divider externally positioned type when, DC current source 101 can be placed outside direct current energy meter point
Device series connection (current divider is in parallel with direct current energy meter as ordinary circumstance) is flowed, thus can be by current divider signal and direct current
It can table parallel connection；
Or
When direct current energy meter is current divider externally positioned type, DC current source 101 can go here and there with current divider analog source 104
Connection, current divider analog source 104 is in parallel with direct current energy meter, for replacing DC current source 101 and current divider.
Note that the relationship of mode is in the second way and third：When direct current energy meter is current divider externally positioned type, if point
Stream device externally positioned type direct current energy meter has the current divider for being placed outside direct current energy meter, then can be connected according to the second way, if shunting
Device externally positioned type direct current energy meter is not placed outside the current divider of direct current energy meter, then can be connected according to the third mode
Please respectively refering to fig. 1, Fig. 2, Fig. 3；
Referring to Fig. 1, when direct current energy meter is current divider internally-arranged type, DC current source 101 is specifically built in multiple
The current divider of direct current energy meter is connected.The upper right corner is checklist platform 2 in Fig. 1, wherein there is 6 epitopes, three, left side epitope and most
One, the right epitope is provided with direct current energy meter to be detected, has a vertical club above each epitope, is fixing lock, when
Fixing lock pulls up, and direct current energy meter can be mounted in epitope, and then fixing lock is pressed downward, and lock direct current energy meter.In Fig. 1,
Thicker line is current line, that is, transmits electric current to the conducting wire of direct current energy meter.In Fig. 1, four on upper right corner checklist platform 2
The device of square shape is direct current energy meter, has 4 interfaces thereon, two, the left side is voltage interface, and two, the right connects for electric current
Mouthful, in addition, also circle interface, for exporting pulse to error checking unit 3.In Fig. 1, power source electrical energy measurement unit it is interior
Portion's circuit is not drawn.Fig. 2 and Fig. 3 are similarly.
Fig. 1 provides a kind of signal of one embodiment of multi-epitope direct-current electric energy meter calibrating device for the utility model
Figure；In one embodiment, DC current source 102 is specifically connected with multiple direct current energy meters.First implementation shown in Fig. 1
In example, when examining and determine the direct current energy meter built in current divider, respectively by every road direct voltage source 101 in calibration power source 1 and every road
Direct current energy meter carries out parallel connection, and DC current source 102 is connected with all tested direct current energy meters.It will each be detected respectively
Direct current energy meter output pulse and the output pulse in calibration power source 1 comparison, obtain each tested direct current energy meter
Electric energy error.
Fig. 2 provides a kind of signal of second embodiment of multi-epitope direct-current electric energy meter calibrating device for the utility model
Figure；When direct current energy meter is current divider externally positioned type, DC current source 101 is connected with the current divider for being placed outside direct current energy meter
(current divider, that is, standard shunt 105, ordinary circumstance is in parallel with direct current energy meter), thus can be by current divider signal and direct current
Electric energy meter is in parallel, and in Fig. 2, the current input terminal mouth of direct current energy meter is in parallel with the output port of a standard shunt 105；Direct current
Current source 102 connects standard shunt 105.In second embodiment shown in Fig. 2, calibrating current divider is external, and (standard shunts
Device 105 is external) direct current energy meter when, respectively by every road direct voltage source 101 in calibration power source 1 with per road direct current energy meter
In parallel, the connection standard shunt 105 of DC current source 102 is carried out, respectively by the input of the electric current of every road direct current energy meter and standard
The voltage output port of current divider 105 is in parallel.By each tested direct current energy meter output pulse and calibration power source 1 it is defeated
Go out pulse comparison, obtains the electric energy error of each tested direct current energy meter.
Fig. 3 provides a kind of signal of the third embodiment of multi-epitope direct-current electric energy meter calibrating device for the utility model
Figure；When direct current energy meter is current divider externally positioned type, DC current source 101 is connected with current divider analog source 104, current divider mould
Quasi- information source 104 is in parallel with direct current energy meter, for replacing DC current source 101 and current divider.In third embodiment, direct current
Stream source 102 specifically connects the input port of current divider analog source 104；The output port and direct current of current divider analog source 104
Electric energy meter corresponds and parallel connection, for passing through the electric current after multiple output ports difference output steering to direct current energy meter.
In third embodiment shown in Fig. 3, when the calibrating external direct current energy meter of current divider, current divider simulation signal generator can be used
104 analogue current sources, it is respectively that every road direct voltage source 101 in calibration power source 1 is in parallel with per road direct current energy meter progress, point
The electric current input of the roads Bie Jiangmei direct current energy meter is in parallel with current divider analog source 104.By each tested direct current energy meter
Pulse and the output pulse in calibration power source 1 comparison are exported, the electric energy error of each tested direct current energy meter is obtained.It is straight at this time
The current divider that galvanic electricity energy off-balancesheet is set actually is split the replacement of device simulation signal generator 104, thus can be used for monitoring not external
The direct current energy meter of current divider.
A kind of multi-epitope direct-current electric energy meter calibrating device provided by the utility model is described in detail above, it is right
In those of ordinary skill in the art, based on the idea of the embodiment of the present invention, in specific embodiments and applications
There will be changes, in conclusion the content of the present specification should not be construed as a limitation of the present invention.
Claims (10)
1. a kind of multi-epitope direct-current electric energy meter calibrating device, which is characterized in that including：Calibration power source, checklist platform and error
Verification unit；
The calibration power source includes：Mutually isolated multiple direct voltage sources, DC current source and power source electrical energy measurement list
Member；
The multiple direct voltage source on the checklist platform multiple direct current energy meters correspond and it is in parallel；
The DC current source is connect with the direct current energy meter, for providing electric current for the direct current energy meter；
The direct voltage source and the DC current source are also connected with the power source electrical energy measurement unit, the power source electric energy
Metering units are used to measure the electric energy in the virtual power circuit of the direct voltage source and DC current source simulation；
The error checking unit connects the power source electrical energy measurement unit and the direct current energy meter, is used for the mark
The output pulse of the output pulse and the direct current energy meter of quasi- power source.
2. a kind of multi-epitope direct-current electric energy meter calibrating device according to claim 1, which is characterized in that the power source electricity
The voltage acquisition circuit and current acquisition circuit of energy metering units use the Hall sensor of Zero flux.
3. a kind of multi-epitope direct-current electric energy meter calibrating device according to claim 1, which is characterized in that the calibration power
Source further includes current divider analog source；
The current input terminal of the current divider analog source connection direct current energy meter, passes through current divider for analog DC source
Voltage signal afterwards.
4. a kind of multi-epitope direct-current electric energy meter calibrating device according to claim 3, which is characterized in that the DC current
The current input terminal mouth of table connects the DC current source or the current divider analog source.
5. a kind of multi-epitope direct-current electric energy meter calibrating device according to claim 1, which is characterized in that
When the direct current energy meter is current divider internally-arranged type, the DC current source is specifically built in the direct current with multiple
The current divider series connection of energy table；
Or
When the direct current energy meter is current divider externally positioned type, the DC current source and point for being placed outside the direct current energy meter
Device series connection is flowed, for current divider signal is in parallel with the direct current energy meter；
Or
When the direct current energy meter is current divider externally positioned type, the DC current source is connected with the current divider analog source,
The current divider analog source is in parallel with the direct current energy meter, for replacing DC current source and current divider.
6. a kind of multi-epitope direct-current electric energy meter calibrating device according to claim 1, which is characterized in that the checklist platform
On be provided with multiple epitopes；
The structure of the epitope is corresponding with the direct current energy meter structure, for installing the direct current energy meter；
4 piece-root grafting line contact pins are provided in the epitope, it is corresponding with the patch jack on the direct current energy meter.
7. a kind of multi-epitope direct-current electric energy meter calibrating device according to claim 6, which is characterized in that set in the epitope
It is equipped with fixing lock；
The fixing lock is the object block moved back and forth, corresponding with the groove on the direct current energy meter, and institute is mounted on for locking
State the direct current energy meter of epitope.
8. a kind of multi-epitope direct-current electric energy meter calibrating device according to claim 6, which is characterized in that the DC voltage
Source and the DC current source are connect especially by the wiring contact pin in the epitope with the direct current energy meter.
9. a kind of multi-epitope direct-current electric energy meter calibrating device according to claim 1, which is characterized in that the error checking
The main control chip of unit is specially the arbitrary combination of microcontroller, ARM, DSP or industrial personal computer.
10. a kind of multi-epitope direct-current electric energy meter calibrating device according to claim 1, which is characterized in that the power source
Electrical energy measurement unit includes microprocessor, electric energy detection unit, electric energy display unit and 485 pulse output end mouths；
The microprocessor is separately connected the microprocessor, the electric energy detection unit, the electric energy display unit and described
485 pulse output end mouths；
The electric energy detection unit connects the direct voltage source and the DC current source；
The electric energy display unit is for showing energy data；
The 485 pulse output end mouth is for exporting pulse.
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| CN201820045395.0U CN207689656U (en) | 2018-01-11 | 2018-01-11 | A kind of multi-epitope direct-current electric energy meter calibrating device |
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| CN201820045395.0U CN207689656U (en) | 2018-01-11 | 2018-01-11 | A kind of multi-epitope direct-current electric energy meter calibrating device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109738846A (en) * | 2019-01-25 | 2019-05-10 | 杭州海兴电力科技股份有限公司 | A kind of correction method based on meter active self-correcting |
| CN110161448A (en) * | 2019-04-26 | 2019-08-23 | 云南电网有限责任公司电力科学研究院 | A kind of 10kV portable high-pressure wideband electric energy on-site calibrating method and device |
| CN110471023A (en) * | 2019-08-02 | 2019-11-19 | 珠海科盈自动化***有限公司 | A kind of test fixture and method of Direct Current Instrument |
| CN114002471A (en) * | 2021-11-01 | 2022-02-01 | 中国人民解放军63796部队 | Multifunctional electric power parameter measuring instrument verification system |
| US20230038599A1 (en) * | 2021-08-03 | 2023-02-09 | Potens Semiconductor Corp. | Electromagnetic interference regulator by use of capacitive parameters of field-effect transistor |
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2018
- 2018-01-11 CN CN201820045395.0U patent/CN207689656U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109738846A (en) * | 2019-01-25 | 2019-05-10 | 杭州海兴电力科技股份有限公司 | A kind of correction method based on meter active self-correcting |
| CN110161448A (en) * | 2019-04-26 | 2019-08-23 | 云南电网有限责任公司电力科学研究院 | A kind of 10kV portable high-pressure wideband electric energy on-site calibrating method and device |
| CN110471023A (en) * | 2019-08-02 | 2019-11-19 | 珠海科盈自动化***有限公司 | A kind of test fixture and method of Direct Current Instrument |
| US20230038599A1 (en) * | 2021-08-03 | 2023-02-09 | Potens Semiconductor Corp. | Electromagnetic interference regulator by use of capacitive parameters of field-effect transistor |
| US11804834B2 (en) * | 2021-08-03 | 2023-10-31 | Potens Semiconductor Corp. | Electromagnetic interference regulator by use of capacitive parameters of field-effect transistor |
| CN114002471A (en) * | 2021-11-01 | 2022-02-01 | 中国人民解放军63796部队 | Multifunctional electric power parameter measuring instrument verification system |
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