CN109683122A - A kind of three-phase normal power electric energy meter with self calibration diagnostic function - Google Patents
A kind of three-phase normal power electric energy meter with self calibration diagnostic function Download PDFInfo
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- CN109683122A CN109683122A CN201910175213.0A CN201910175213A CN109683122A CN 109683122 A CN109683122 A CN 109683122A CN 201910175213 A CN201910175213 A CN 201910175213A CN 109683122 A CN109683122 A CN 109683122A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
Abstract
The invention discloses a kind of three-phase normal power electric energy meters with self calibration diagnostic function, including three-phase current input terminal, three-phase voltage input terminal, threephase current transformer, three-phase bleeder circuit, three-phase current operational amplifier, three-phase voltage operational amplifier, three-phase current A/D converter, three-phase voltage A/D converter, central processing unit, alarm, normalized current calibration signal source and normal voltage calibration signal source；It is advantageous in that using the three-phase normal power electric energy meter, when the value out of range of current error and/or voltage error, alarm exports warning message, indicate that the accuracy in detection of the three-phase normal power electric energy meter is overproof, and the current error can avoid the testing result as caused by the accuracy of measuring difference of three-phase normal power electric energy meter in the prior art with this and judge erroneous detection problem by accident as the electric current correction value of the correspondence phase of the three-phase current detection value and/or using the voltage error as the voltage correction value of the correspondence phase of the detecting voltage by three phase value.
Description
Technical field
The present invention relates to electric energy meter technical field, specially a kind of three-phase calibration power electric energy with self calibration diagnostic function
Table.
Background technique
Normal power electric energy meter is a kind of electrical energy measurement master meter, is applied to electric energy meter calibration as standard mostly
Device can also be individually used for laboratory, and class of accuracy can be divided into 0.05%, 0.02%, 0.01% etc., can measure three intersections
The electric parameters such as galvanic electricity pressure, the voltage of current signal, electric current, frequency, phase, power, and electricity corresponding with power can be issued
Energy impulse signal.
As a kind of standard metering instrument, current three-phase normal power electric energy meter is to be calibrated before factory, and pass through
The relevant technologies superintendent office measurement verification rear can be used with device, also need periodically to be examined and determine in use, with true
The accuracy of measuring is protected in relevant national standard claimed range.
But in use, the accuracy of measuring of three-phase normal power electric energy meter can be caused poor due to many reasons, this
Erroneous judgement erroneous detection will be caused to verification result.
Summary of the invention
The purpose of the present invention is to provide a kind of three-phase normal power electric energy meter with self calibration diagnostic function, to avoid by
The testing result caused by the accuracy of measuring difference of three-phase normal power electric energy meter judges erroneous detection problem by accident.
To achieve this purpose, the present invention adopts the following technical scheme:
A kind of three-phase normal power electric energy meter with self calibration diagnostic function, including three-phase current input terminal, three-phase voltage
Input terminal, threephase current transformer, three-phase bleeder circuit, three-phase current operational amplifier, three-phase voltage operational amplifier, three-phase
Electric current A/D converter, three-phase voltage A/D converter and central processing unit；
The three-phase current input terminal is connected in series in the primary side of the threephase current transformer, the three-phase electricity respectively
The secondary side of current transformer is separately connected the input terminal of the three-phase current operational amplifier, the three-phase current operational amplifier
Output end be separately connected the input terminal of the three-phase current A/D converter, the output end point of the three-phase current A/D converter
The central processing unit is not connected；
The three-phase voltage input terminal is connected in parallel on the both ends of the three-phase bleeder circuit respectively, the three-phase bleeder circuit
The both ends of divider resistance are connected in parallel on the input terminal of the three-phase voltage operational amplifier, the three-phase voltage operational amplifier respectively
Output end be separately connected the input terminal of the three-phase voltage A/D converter, the output end point of the three-phase voltage A/D converter
The central processing unit is not connected；
The three-phase normal power electric energy meter further includes normalized current calibration signal source and normal voltage calibration signal source；
The three-phase current input terminal can also switch the input for being connected to the normalized current calibration signal source respectively
The output end at end, the normalized current calibration signal source connects the central processing unit；
The three-phase voltage input terminal can also switch the input for being connected in parallel to the normal voltage calibration signal source respectively
The output end at end, the normal voltage calibration signal source connects the central processing unit；
The central processing unit is used to calculate three-phase current detection according to the output valve of the three-phase current A/D converter
Value calculates detecting voltage by three phase value according to the output valve of the three-phase voltage A/D converter, is calibrated and believed according to the normalized current
The output valve in number source calculates three-phase current standard value, calculates three-phase voltage according to the output valve of the normal voltage calibration signal source
Standard value, and the three-phase current error between the three-phase current detection value and the three-phase current standard value is calculated, described three
Three-phase voltage error between phase-voltage measurement value and the three-phase voltage standard value.
Optionally, the central processing unit is dsp processor.
Optionally, the amplitude of the normalized current calibration signal source is a fixed value.
Optionally, the amplitude of the normal voltage calibration signal source is a fixed value.
Optionally, the electric current with the voltage of normal voltage calibration signal source of the normalized current calibration signal source are to exchange
Signal and frequency is identical, the phase value fixed angle between Current Voltage is 60 °.
Optionally, the three-phase normal power electric energy meter further includes three-phase current switching circuit, the three-phase current input
The input terminal at end, the primary side of threephase current transformer and normalized current calibration signal source is electrically connected the three-phase current and cuts
Change circuit；
The three-phase current switching circuit is connected on the three-phase current for switching the three-phase current input terminal respectively
The primary side of mutual inductor or the input terminal for being connected on the normalized current calibration signal source.
Optionally, which further includes three-phase voltage switching circuit, the three-phase voltage input terminal,
Three-phase bleeder circuit and the input terminal of normal voltage calibration signal source are electrically connected the three-phase voltage switching circuit；
The three-phase voltage switching circuit is connected in parallel on the three-phase partial pressure for switching the three-phase voltage input terminal respectively
The both ends of circuit or the input terminal for being connected in parallel on the normal voltage calibration signal source.
Optionally, which further includes alarm, and the alarm is connected to the central processing
Device；
When the current error between the three-phase current detection value and the three-phase current standard value is permitted more than three-phase current
Perhaps voltage error when worst error value and/or between the detecting voltage by three phase value and the three-phase voltage standard value is more than three
When phase voltage allows worst error value, the alarm exports warning message.
Optionally, when the current error between the three-phase current detection value and the three-phase current standard value is more than three-phase
When electric current allows worst error value, using the current error as the electric current correction value of the correspondence phase of the three-phase current detection value；
When the voltage error between the detecting voltage by three phase value and the three-phase voltage standard value is permitted more than three-phase voltage
Perhaps when worst error value, using the voltage error as the voltage correction value of the correspondence phase of the detecting voltage by three phase value.
Compared with prior art, the embodiment of the present invention has the advantages that
A kind of three-phase normal power electric energy meter with self calibration diagnostic function provided in this embodiment, it is mutual by three-phase current
Sensor, three-phase current operational amplifier, three-phase current A/D converter and central processing unit measure three-phase current detection value, pass through
Three-phase bleeder circuit, three-phase voltage operational amplifier, three-phase voltage A/D converter and central processing unit measure detecting voltage by three phase
Value measures three-phase current standard value and the survey of normal voltage calibration signal source using normalized current calibration signal source respectively by switching
Measure three-phase voltage standard value；The three-phase current detection value and the three-phase current standard value are calculated finally by central processing unit
Between three-phase current error, the three-phase voltage error between the detecting voltage by three phase value and the three-phase voltage standard value.
When the value out of range of three-phase current error and/or three-phase voltage error, the inspection of the three-phase normal power electric energy meter is indicated
Survey accuracy is overproof, can avoid inspection caused by the accuracy of measuring difference due to three-phase normal power electric energy meter in the prior art with this
It surveys result and judges erroneous detection problem by accident.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other attached drawings according to these attached drawings.
Fig. 1 is a kind of circuit of the three-phase normal power electric energy meter with self calibration diagnostic function provided in an embodiment of the present invention
Structure chart.
Specific embodiment
In order to make the invention's purpose, features and advantages of the invention more obvious and easy to understand, below in conjunction with the present invention
Attached drawing in embodiment, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that disclosed below
Embodiment be only a part of the embodiment of the present invention, and not all embodiment.Based on the embodiments of the present invention, this field
Those of ordinary skill's all other embodiment obtained without making creative work, belongs to protection of the present invention
Range.
As shown in Figure 1, the embodiment of the invention provides a kind of three-phase normal power electric energy meter with self calibration diagnostic function,
It is put including three-phase current input terminal, three-phase voltage input terminal, threephase current transformer, three-phase bleeder circuit, three-phase current operation
Big device, three-phase voltage operational amplifier, three-phase current A/D converter, three-phase voltage A/D converter and central processing unit.
Specifically, three-phase current includes A phase current, B phase current, C phase current；Three-phase voltage includes A phase voltage, B phase electricity
Pressure, C phase voltage；Threephase current transformer includes that the A phase current mutual inductor connecting with A phase current input terminal and B phase current input
The B phase current mutual inductor for holding connection, the C phase current mutual inductor being connect with C phase current input terminal.
Three-phase bleeder circuit includes A phase bleeder circuit, B phase bleeder circuit, C phase bleeder circuit, in Fig. 1 successively on to
Lower arrangement.
Three-phase current operational amplifier includes A phase current operational amplifier, B phase current operational amplifier, C phase current operation
Amplifier is connect with A phase current mutual inductor, B phase current mutual inductor, C phase current mutual inductor respectively.
Three-phase voltage operational amplifier includes A phase voltage operational amplifier, B phase voltage operational amplifier, C phase voltage operation
Amplifier is connect with A phase bleeder circuit, B phase bleeder circuit, C phase bleeder circuit respectively.
Three-phase current A/D converter includes A phase current A/D converter, B phase current A/D converter, C phase current A/D conversion
Device successively arranges in Fig. 1 from top to bottom respectively.
Three-phase voltage A/D converter includes A phase voltage A/D converter, B phase voltage A/D converter, C phase voltage A/D conversion
Device successively arranges in Fig. 1 from top to bottom respectively.
Therefore, the three-phase current input terminal is connected in series in the primary side of the threephase current transformer respectively, described
The secondary side of threephase current transformer is separately connected the input terminal of the three-phase current operational amplifier, the three-phase current operation
The output end of amplifier is separately connected the input terminal of the three-phase current A/D converter, the three-phase current A/D converter it is defeated
Outlet is separately connected the central processing unit.
The three-phase voltage input terminal is connected in parallel on the both ends of the three-phase bleeder circuit respectively, the three-phase bleeder circuit
The both ends of divider resistance are connected in parallel on the input terminal of the three-phase voltage operational amplifier, the three-phase voltage operational amplifier respectively
Output end be separately connected the input terminal of the three-phase voltage A/D converter, the output end point of the three-phase voltage A/D converter
The central processing unit is not connected.
Meanwhile the three-phase normal power electric energy meter further includes normalized current calibration signal source and normal voltage calibration signal
Source.
The three-phase current input terminal can also switch the input for being connected to the normalized current calibration signal source respectively
The output end at end, the normalized current calibration signal source connects the central processing unit；I.e. A phase current input terminal, B phase current are defeated
Enter end, C phase current input terminal can be individually connected on the input terminal of normalized current calibration signal source.
The three-phase voltage input terminal can also switch the input for being connected in parallel to the normal voltage calibration signal source respectively
The output end at end, the normal voltage calibration signal source connects the central processing unit；I.e. A phase voltage input terminal, B phase voltage are defeated
Enter end, C phase voltage input terminal can be individually connected in parallel on the input terminal of normal voltage calibration signal source.
Further, the central processing unit is used to calculate three-phase according to the output valve of the three-phase current A/D converter
Current detection value calculates detecting voltage by three phase value according to the output valve of the three-phase voltage A/D converter, according to the standard electric
The output valve for flowing calibration signal source calculates three-phase current standard value, is calculated according to the output valve of the normal voltage calibration signal source
Three-phase voltage standard value, and calculate the mistake of the three-phase current between the three-phase current detection value and the three-phase current standard value
Difference, the three-phase voltage error between the detecting voltage by three phase value and the three-phase voltage standard value.Therefore, three-phase current error
Including A phase current error, B phase current error, C phase current error；Three-phase voltage error includes A phase voltage error, B phase voltage mistake
Difference, C phase voltage error.
It should be noted that electric current input is current input terminal, it is voltage input end at voltage input, electric current is mutual
Sensor includes primary side and secondary side, and bleeder circuit is composed in series by multiple resistance, has a resistance to make in each bleeder circuit
For divider resistance, it to be used for voltage sample.Alternatively, central processing unit uses DSP (Digital Signal
Processing, Digital Signal Processing) CPU, for calculating data.In addition, three-phase current uses same standard current signal source
Calibration, three-phase voltage use same standard voltage signal source calibration, help to maintain and promoted the three-phase normal power electric energy meter
Three-phase measure consistency.
Wherein, the three-phase current detection value and detecting voltage by three phase value obtained according to measurement, can also be calculated three-phase
Performance number.It should be noted that central processing unit can also issue the electrical energy impulse signals proportional to power, based on error
It calculates.
In conclusion a kind of three-phase normal power electric energy meter with self calibration diagnostic function provided in this embodiment, passes through
Threephase current transformer, three-phase current operational amplifier, three-phase current A/D converter and central processing unit measurement three-phase current inspection
Measured value passes through three-phase bleeder circuit, three-phase voltage operational amplifier, three-phase voltage A/D converter and central processing unit measurement three
Phase-voltage measurement value measures three-phase current standard value and normal voltage school using normalized current calibration signal source respectively by switching
Calibration signal source measures three-phase voltage standard value；The three-phase current detection value and the three-phase are calculated finally by central processing unit
Three-phase current error between current standard value, the three-phase between the detecting voltage by three phase value and the three-phase voltage standard value
Voltage error.When the value out of range of three-phase current error and/or three-phase voltage error, the three-phase calibration power electricity is indicated
The accuracy in detection of energy table is overproof, can avoid with this in the prior art since the accuracy of measuring of three-phase normal power electric energy meter is poor
Caused testing result judges erroneous detection problem by accident.
Further, the amplitude of the normalized current calibration signal source is a fixed value.Specifically, the amplitude is equal to small
Current measurement range, such as 100mA or 10mA.
Further, the amplitude of the normal voltage calibration signal source is a fixed value.Specifically, the amplitude is equal to small
Voltage measurement range, such as 10V.
Further, the electric current of the normalized current calibration signal source and the voltage of normal voltage calibration signal source are to hand over
It flows signal and frequency is identical, the phase value fixed angle between Current Voltage is 60 °, for calibrating electric current, voltage, function simultaneously
Rate, power factor etc..
In another embodiment of the application, three-phase normal power electric energy meter further includes three-phase current switching circuit, described
The input terminal of three-phase current input terminal, the primary side of threephase current transformer and normalized current calibration signal source is electrically connected institute
State three-phase current switching circuit；The three-phase current switching circuit is connected on institute for switching the three-phase current input terminal respectively
It states the primary side of threephase current transformer or is connected on the input terminal of the normalized current calibration signal source.
Specifically, three-phase current switching circuit includes that A phase current switching circuit, B phase current switching circuit, C phase current are cut
Circuit is changed, for individually switching A phase current input terminal, B phase current input terminal, C phase current input terminal, is connected on A respectively
The primary side of phase current mutual inductor, the primary side of B phase current mutual inductor, C phase current mutual inductor primary side on；Or it is single respectively
Solely switching A phase current input terminal, B phase current input terminal, C phase current input terminal are connected on the normalized current calibration signal source
Input terminal.
Further, three-phase normal power electric energy meter further includes three-phase voltage switching circuit, the three-phase voltage input terminal,
Three-phase bleeder circuit and the input terminal of normal voltage calibration signal source are electrically connected the three-phase voltage switching circuit；Described three
Phase voltage switching circuit is used to switch respectively the both ends or simultaneously that the three-phase voltage input terminal is connected in parallel on the three-phase bleeder circuit
It is associated in the input terminal of the normal voltage calibration signal source.
Specifically, three-phase voltage switching circuit includes that A phase voltage switching circuit, B phase voltage switching circuit, C phase voltage are cut
Circuit is changed, for individually switching A phase voltage input terminal, B phase voltage input terminal, C phase voltage input terminal, is connected in parallel on A respectively
Phase bleeder circuit, B phase bleeder circuit, on C phase bleeder circuit；Or individually switching A phase voltage input terminal, B phase voltage are defeated
Enter end, C phase voltage input terminal is connected in parallel on the input terminal of the normal voltage calibration signal source.
The present embodiment realizes cutting between three-phase current detection and three-phase current calibration by three-phase current switching circuit
It changes；By three-phase voltage switching circuit, the switching between detecting voltage by three phase and three-phase voltage calibration is realized.
In another embodiment of the application, three-phase normal power electric energy meter includes alarm, and the alarm is connected to
The central processing unit；When the current error between the three-phase current detection value and the three-phase current standard value is more than three-phase
Electric current allows voltage when worst error value and/or between the detecting voltage by three phase value and the three-phase voltage standard value to miss
When difference is more than that three-phase voltage allows worst error value, the alarm exports warning message, to prompt the three-phase calibration power electricity
It is overproof that error occurs in the accuracy of measurement of energy table.
In another embodiment of the application, it is using the advantages of three-phase normal power electric energy meter, when the three-phase
When current error between current detection value and the three-phase current standard value is more than that three-phase current allows worst error value, by this
Electric current correction value of the current error as the correspondence phase of the three-phase current detection value；When the detecting voltage by three phase value and described
When voltage error between three-phase voltage standard value is more than that three-phase voltage allows worst error value, using the voltage error as described in
The voltage correction value of the correspondence phase of detecting voltage by three phase value.
By electric current correction value and voltage correction value, asking for the accuracy of measuring difference of three-phase normal power electric energy meter is solved
Topic, and then testing result is avoided to judge erroneous detection by accident.
The above, the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although referring to before
Stating embodiment, invention is explained in detail, those skilled in the art should understand that: it still can be to preceding
Technical solution documented by each embodiment is stated to modify or equivalent replacement of some of the technical features；And these
It modifies or replaces, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (9)
1. a kind of three-phase normal power electric energy meter with self calibration diagnostic function, which is characterized in that including three-phase current input terminal,
Three-phase voltage input terminal, threephase current transformer, three-phase bleeder circuit, three-phase current operational amplifier, three-phase voltage operation are put
Big device, three-phase current A/D converter, three-phase voltage A/D converter and central processing unit；
The three-phase current input terminal is connected in series in the primary side of the threephase current transformer respectively, and the three-phase current is mutual
The secondary side of sensor is separately connected the input terminal of the three-phase current operational amplifier, the three-phase current operational amplifier it is defeated
Outlet is separately connected the input terminal of the three-phase current A/D converter, and the output end of the three-phase current A/D converter connects respectively
Connect the central processing unit；
The three-phase voltage input terminal is connected in parallel on the both ends of the three-phase bleeder circuit, the partial pressure of the three-phase bleeder circuit respectively
The both ends of resistance are connected in parallel on the input terminal of the three-phase voltage operational amplifier respectively, the three-phase voltage operational amplifier it is defeated
Outlet is separately connected the input terminal of the three-phase voltage A/D converter, and the output end of the three-phase voltage A/D converter connects respectively
Connect the central processing unit；
The three-phase normal power electric energy meter further includes normalized current calibration signal source and normal voltage calibration signal source；
The three-phase current input terminal can also switch the input terminal for being connected to the normalized current calibration signal source, institute respectively
The output end for stating normalized current calibration signal source connects the central processing unit；
The three-phase voltage input terminal can also switch the input terminal for being connected in parallel to the normal voltage calibration signal source, institute respectively
The output end for stating normal voltage calibration signal source connects the central processing unit；
The central processing unit is used to calculate three-phase current detection value, root according to the output valve of the three-phase current A/D converter
Detecting voltage by three phase value is calculated, according to the normalized current calibration signal source according to the output valve of the three-phase voltage A/D converter
Output valve calculate three-phase current standard value, according to the output valve of the normal voltage calibration signal source calculate three-phase voltage standard
Value, and calculate the three-phase current error between the three-phase current detection value and the three-phase current standard value, the three-phase electricity
Press the three-phase voltage error between detected value and the three-phase voltage standard value.
2. three-phase normal power electric energy meter according to claim 1, which is characterized in that the central processing unit is at DSP
Manage device.
3. three-phase normal power electric energy meter according to claim 1, which is characterized in that the normalized current calibration signal source
Amplitude be a fixed value.
4. three-phase normal power electric energy meter according to claim 1, which is characterized in that the normal voltage calibration signal source
Amplitude be a fixed value.
5. three-phase normal power electric energy meter according to claim 1, which is characterized in that the normalized current calibration signal source
Electric current and the voltage of normal voltage calibration signal source be AC signal and frequency is identical, the phase value between Current Voltage
Fixed angle is 60 °.
6. three-phase normal power electric energy meter according to claim 1, which is characterized in that further include three-phase current switching electricity
Road, the input terminal difference of the three-phase current input terminal, the primary side of threephase current transformer and normalized current calibration signal source
It is electrically connected the three-phase current switching circuit；
The three-phase current switching circuit is connected on the three-phase current mutual inductance for switching the three-phase current input terminal respectively
The primary side of device or the input terminal for being connected on the normalized current calibration signal source.
7. three-phase normal power electric energy meter according to claim 1, which is characterized in that further include three-phase voltage switching electricity
Road, the input terminal of the three-phase voltage input terminal, three-phase bleeder circuit and normal voltage calibration signal source are electrically connected described
Three-phase voltage switching circuit；
The three-phase voltage switching circuit is connected in parallel on the three-phase bleeder circuit for switching the three-phase voltage input terminal respectively
Both ends or be connected in parallel on the input terminal of the normal voltage calibration signal source.
8. three-phase normal power electric energy meter according to claim 1, which is characterized in that it further include alarm, the alarm
Device is connected to the central processing unit；
When the current error between the three-phase current detection value and the three-phase current standard value is more than that three-phase current allows most
Voltage error when big error amount and/or between the detecting voltage by three phase value and the three-phase voltage standard value is more than three-phase electricity
When pressure allows worst error value, the alarm exports warning message.
9. three-phase normal power electric energy meter according to claim 1, which is characterized in that when the three-phase current detection value and
When current error between the three-phase current standard value is more than that three-phase current allows worst error value, using the current error as
The electric current correction value of the correspondence phase of the three-phase current detection value；
When the voltage error between the detecting voltage by three phase value and the three-phase voltage standard value is more than that three-phase voltage allows most
When big error amount, using the voltage error as the voltage correction value of the correspondence phase of the detecting voltage by three phase value.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110471017A (en) * | 2019-09-17 | 2019-11-19 | 上海贝岭股份有限公司 | Power standard source, metering chip and metering device |
| CN112946563A (en) * | 2021-03-16 | 2021-06-11 | 合肥艾通自动化工程有限公司 | Rapid calibration method for three-phase intelligent electric meter and three-phase intelligent electric meter |
| CN113093079A (en) * | 2019-12-23 | 2021-07-09 | 致茂电子(苏州)有限公司 | Electronic component testing device and method |
| CN113820642A (en) * | 2021-11-22 | 2021-12-21 | 武汉格蓝若智能技术有限公司 | Online self-calibration system of synchronous multi-channel voltage acquisition device |
| CN113884726A (en) * | 2021-10-19 | 2022-01-04 | 飞思仪表（深圳）有限公司 | Three-phase smart electric meter with quick calibration structure |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101738593A (en) * | 2009-12-07 | 2010-06-16 | 河南思达高科技股份有限公司 | Standard energy meter and correcting method of sampled signals thereof |
| CN202075344U (en) * | 2011-04-21 | 2011-12-14 | 深圳市锐能微科技有限公司 | Electric energy meter and electric energy correction system |
| CN106154208A (en) * | 2016-07-22 | 2016-11-23 | 溧阳市华鹏电力仪表有限公司 | The quick self-calibration system of a kind of guide tracked single-phase electric energy Watch Error and method for self-calibrating |
| CN106338705A (en) * | 2015-07-10 | 2017-01-18 | 侯飞 | Error verifying method and device for three-phase electric energy metering device |
| CN106569167A (en) * | 2016-10-17 | 2017-04-19 | 中国电力科学研究院 | Electric energy meter error automatic checking method and electric energy meter |
| CN108267708A (en) * | 2017-12-28 | 2018-07-10 | 宁波三星医疗电气股份有限公司 | For the quick calibration method of single-phase smart meter error self-correcting |
-
2019
- 2019-03-08 CN CN201910175213.0A patent/CN109683122A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101738593A (en) * | 2009-12-07 | 2010-06-16 | 河南思达高科技股份有限公司 | Standard energy meter and correcting method of sampled signals thereof |
| CN202075344U (en) * | 2011-04-21 | 2011-12-14 | 深圳市锐能微科技有限公司 | Electric energy meter and electric energy correction system |
| CN106338705A (en) * | 2015-07-10 | 2017-01-18 | 侯飞 | Error verifying method and device for three-phase electric energy metering device |
| CN106154208A (en) * | 2016-07-22 | 2016-11-23 | 溧阳市华鹏电力仪表有限公司 | The quick self-calibration system of a kind of guide tracked single-phase electric energy Watch Error and method for self-calibrating |
| CN106569167A (en) * | 2016-10-17 | 2017-04-19 | 中国电力科学研究院 | Electric energy meter error automatic checking method and electric energy meter |
| CN108267708A (en) * | 2017-12-28 | 2018-07-10 | 宁波三星医疗电气股份有限公司 | For the quick calibration method of single-phase smart meter error self-correcting |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110471017A (en) * | 2019-09-17 | 2019-11-19 | 上海贝岭股份有限公司 | Power standard source, metering chip and metering device |
| CN113093079A (en) * | 2019-12-23 | 2021-07-09 | 致茂电子(苏州)有限公司 | Electronic component testing device and method |
| CN112946563A (en) * | 2021-03-16 | 2021-06-11 | 合肥艾通自动化工程有限公司 | Rapid calibration method for three-phase intelligent electric meter and three-phase intelligent electric meter |
| CN113884726A (en) * | 2021-10-19 | 2022-01-04 | 飞思仪表（深圳）有限公司 | Three-phase smart electric meter with quick calibration structure |
| CN113820642A (en) * | 2021-11-22 | 2021-12-21 | 武汉格蓝若智能技术有限公司 | Online self-calibration system of synchronous multi-channel voltage acquisition device |
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