CN103513218A - Calibration method for multi-path alternating-current ammeter - Google Patents
Calibration method for multi-path alternating-current ammeter Download PDFInfo
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- CN103513218A CN103513218A CN201210213862.3A CN201210213862A CN103513218A CN 103513218 A CN103513218 A CN 103513218A CN 201210213862 A CN201210213862 A CN 201210213862A CN 103513218 A CN103513218 A CN 103513218A
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Abstract
The invention provides a calibration method for a multi-path alternating-current ammeter including a metering chip and a central processing unit. The calibration method comprises the following steps that: a standard source respectively powers all loops and provides a metering standard; the standard source calculates a metering error of the ammeter based on a pulse output of the ammeter; and upper computer calculates a value of meter calibration register according to the metering error; and the upper computer carries out communication with the central processing unit of the ammeter by a serial port and writes the value of the register into the metering chip. Therefore, the working efficiency and the accuracy of the calibration are improved.
Description
Technical field
The present invention relates to electrical energy meter calibration technical field, relate in particular to a kind of correction method of multichannel AC ammeter.
Background technology
The production of electric energy is different from the production of other products, is characterized in that generating plant generating, power supply department power supply, user power utilization ，Zhe Sange department are linked to be a network system and work incessantly, indispensable mutually.Between them, how to sell electric energy, economic balance how, need measure between a measurement instrument San Ge department, and calculate the quantity of electric energy.With the closely-related electric energy meter of productive life be the main tool of current metering and economic balance electric energy, accurately whether its performance and, be directly connected to country and user's economic interests, so underproof electric energy meter is carried out to error adjustment seem very important.
For keeping the national economy production order, safeguard tripartite's interests, country has formulated " measurement Law ", and the electric energy meter of adjusting for trade is listed in to compulsory verification scope.Electric energy meter checking device, as electric energy meter being carried out to the standard device of error checking, can produce producer, power supply department and metrological service for electric energy hypergene electronic type or induction type electric energy meter are carried out to verification.The development of electric energy meter checking device from " electrician's formula " calibration equipment to " electronic type " calibration equipment again to " program control type " calibration equipment.
Summary of the invention
The object of the present invention is to provide a kind of correction method of multichannel AC ammeter.
Correspondingly, the correction method of a kind of multichannel AC ammeter of the present invention, this ammeter comprises computation chip and central processing unit, correction method comprises the following steps:
Standard source is powered in Dui Ge loop respectively, and measurement standard is provided;
Standard source calculates the error in dipping of ammeter by the pulse output of ammeter;
Host computer calculates the value of calibration register according to error in dipping;
Host computer communicates by serial ports and ammeter central processing unit, and the value of register is write to computation chip.
As a further improvement on the present invention, at standard source, Dui Ge loop before powering, need calibration parameter to carry out initialization respectively, comprise voltage channel ADC gain selection, high-frequency impulse output setting, the setting of decompression threshold values, starting current setting, the setting of energy accumulation pattern, rated current, rated voltage setting.
As a further improvement on the present invention, three-phase is proofreaied and correct and is comprised: voltage correction, current correction, capability correction, phase correction.
As a further improvement on the present invention, described capability correction is set 100% rated current, and power factor (PF) is 1.0.
As a further improvement on the present invention, described capability correction is set 5% rated current, and power factor (PF) is 1.0.
As a further improvement on the present invention, described phase correction is set 100% rated current, and power factor (PF) is 0.5L.
As a further improvement on the present invention, every computation chip is distinguished with different mailing addresses.
The invention has the beneficial effects as follows: the work efficiency and the accuracy that have improved calibration.
Accompanying drawing explanation
Fig. 1 shows the process flow diagram of the correction method of a kind of multichannel AC ammeter of the present invention.
Embodiment
Below with reference to each embodiment shown in the drawings, describe the present invention.But these embodiments do not limit the present invention, the conversion in the structure that those of ordinary skill in the art makes according to these embodiments, method or function is all included in protection scope of the present invention.
As shown in Figure 1, the correction method of a kind of multichannel AC ammeter of the present invention, comprises the following steps:
Standard source is powered in Dui Ge loop respectively, and measurement standard is provided;
Standard source calculates the error in dipping of ammeter by the pulse output of ammeter;
Host computer calculates the value of calibration register according to error in dipping;
Host computer communicates by serial ports and ammeter central processing unit, and the value of register is write to computation chip.
Particularly, multichannel AC ammeter adopts ATT7026 chip as computation chip, comprises a central processing unit, three ATT7026 computation chips on every circuit board, can measure nine road alternating currents.Host computer can communicate by 485 serial ports and ammeter central processing unit, and the value of register is write to computation chip, and every computation chip is distinguished with different mailing addresses.
Before power supply, need calibration parameter to carry out initialization, comprise voltage channel ADC gain selection, high-frequency impulse output setting, the setting of decompression threshold values, starting current setting, the setting of energy accumulation pattern, rated current, rated voltage setting.
In trimming process, need to carry out respectively voltage correction, current correction, capability correction (100% rated current to three-phase, power factor (PF) 1.0), phase correction (100% rated current, power factor (PF) 0.5L), capability correction (5% rated current, power factor (PF) 1.0).
Be to be understood that, although this instructions is described according to embodiment, but not each embodiment only comprises an independently technical scheme, this narrating mode of instructions is only for clarity sake, those skilled in the art should make instructions as a whole, technical scheme in each embodiment also can, through appropriately combined, form other embodiments that it will be appreciated by those skilled in the art that.
Listed a series of detailed description is above only illustrating for feasibility embodiment of the present invention; they are not in order to limit the scope of the invention, all disengaging within equivalent embodiment that skill spirit of the present invention does or change all should be included in protection scope of the present invention.
Claims (7)
1. a correction method for multichannel AC ammeter, this ammeter comprises computation chip and central processing unit, it is characterized in that, correction method comprises the following steps:
Standard source is powered in Dui Ge loop respectively, and measurement standard is provided;
Standard source calculates the error in dipping of ammeter by the pulse output of ammeter;
Host computer calculates the value of calibration register according to error in dipping;
Host computer communicates by serial ports and ammeter central processing unit, and the value of register is write to computation chip.
2. the correction method of a kind of multichannel AC ammeter according to claim 1, it is characterized in that: at standard source, Dui Ge loop before powering, need calibration parameter to carry out initialization respectively, comprise voltage channel ADC gain selection, high-frequency impulse output setting, the setting of decompression threshold values, starting current setting, the setting of energy accumulation pattern, rated current, rated voltage setting.
3. the correction method of a kind of multichannel AC ammeter according to claim 1 and 2, is characterized in that: three-phase is proofreaied and correct and comprised: voltage correction, current correction, capability correction, phase correction.
4. the correction method of a kind of multichannel AC ammeter according to claim 3, is characterized in that: described capability correction is set 100% rated current, and power factor (PF) is 1.0.
5. the correction method of a kind of multichannel AC ammeter according to claim 3, is characterized in that: described capability correction is set 5% rated current, and power factor (PF) is 1.0.
6. the correction method of a kind of multichannel AC ammeter according to claim 3, is characterized in that: described phase correction is set 100% rated current, and power factor (PF) is 0.5L.
7. the correction method of a kind of multichannel AC ammeter according to claim 1, is characterized in that: every computation chip is distinguished with different mailing addresses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210213862.3A CN103513218A (en) | 2012-06-27 | 2012-06-27 | Calibration method for multi-path alternating-current ammeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210213862.3A CN103513218A (en) | 2012-06-27 | 2012-06-27 | Calibration method for multi-path alternating-current ammeter |
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| CN103513218A true CN103513218A (en) | 2014-01-15 |
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| CN201210213862.3A Pending CN103513218A (en) | 2012-06-27 | 2012-06-27 | Calibration method for multi-path alternating-current ammeter |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104020437A (en) * | 2014-06-21 | 2014-09-03 | 宁波三星电气股份有限公司 | Electric energy meter correction method |
| CN105738692A (en) * | 2014-12-11 | 2016-07-06 | 苏州工业园区新宏博通讯科技有限公司 | Electric energy meter and debugging method thereof |
| CN105891762A (en) * | 2014-09-18 | 2016-08-24 | 浙江万胜电力仪表有限公司 | Specification parameter setting method of power instrument |
| CN109959819A (en) * | 2017-12-26 | 2019-07-02 | 宁波三星医疗电气股份有限公司 | A kind of intelligent meter broadband reactive power error backoff algorithm and its intelligent meter |
| CN113176531A (en) * | 2021-05-24 | 2021-07-27 | 苏州大学 | Passive calibration method of intelligent electric meter |
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| JPS61126485A (en) * | 1984-11-22 | 1986-06-13 | Toshiba Corp | Error measuring instrument |
| GB2259784A (en) * | 1991-09-19 | 1993-03-24 | Ampy Automation Digilog | Calibration of power meters |
| CN101876693A (en) * | 2010-06-09 | 2010-11-03 | 合肥工业大学 | Electric energy metering chip-based terminal calibration system |
| CN201698018U (en) * | 2010-07-20 | 2011-01-05 | 威胜集团有限公司 | Digitized field electricity meter inspection system |
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2012
- 2012-06-27 CN CN201210213862.3A patent/CN103513218A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61126485A (en) * | 1984-11-22 | 1986-06-13 | Toshiba Corp | Error measuring instrument |
| GB2259784A (en) * | 1991-09-19 | 1993-03-24 | Ampy Automation Digilog | Calibration of power meters |
| CN101876693A (en) * | 2010-06-09 | 2010-11-03 | 合肥工业大学 | Electric energy metering chip-based terminal calibration system |
| CN201698018U (en) * | 2010-07-20 | 2011-01-05 | 威胜集团有限公司 | Digitized field electricity meter inspection system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104020437A (en) * | 2014-06-21 | 2014-09-03 | 宁波三星电气股份有限公司 | Electric energy meter correction method |
| CN105891762A (en) * | 2014-09-18 | 2016-08-24 | 浙江万胜电力仪表有限公司 | Specification parameter setting method of power instrument |
| CN105891762B (en) * | 2014-09-18 | 2019-06-18 | 浙江万胜电力仪表有限公司 | A kind of setting method of the specifications parameter of electric instrument |
| CN105738692A (en) * | 2014-12-11 | 2016-07-06 | 苏州工业园区新宏博通讯科技有限公司 | Electric energy meter and debugging method thereof |
| CN109959819A (en) * | 2017-12-26 | 2019-07-02 | 宁波三星医疗电气股份有限公司 | A kind of intelligent meter broadband reactive power error backoff algorithm and its intelligent meter |
| CN113176531A (en) * | 2021-05-24 | 2021-07-27 | 苏州大学 | Passive calibration method of intelligent electric meter |
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Application publication date: 20140115 |