CN103983938A - Electric energy meter small signal offset correcting method - Google Patents
Electric energy meter small signal offset correcting method Download PDFInfo
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- CN103983938A CN103983938A CN201410178047.7A CN201410178047A CN103983938A CN 103983938 A CN103983938 A CN 103983938A CN 201410178047 A CN201410178047 A CN 201410178047A CN 103983938 A CN103983938 A CN 103983938A
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Abstract
The invention discloses an electric energy meter small signal offset correcting method. According to the method, testing is carried out under 100% Ib point resistance 1.0, under 100% Ib point inductance 0.5L and under 5% Ib point resistance 1.0. The correcting method is high in correcting speed.
Description
Technical field
The present invention relates to electric energy meter technical field, is specifically a kind of bearing calibration of electric energy meter small-signal biasing.
Background technology
The bearing calibration of prior art electric energy meter small-signal biasing is as follows: the resistive 1.0 times accuracy tests of (1), 100%Ib point: read electric energy meter and detect the error amount on stage body, this value detects after stage body calculates and draws yield value through electric energy meter, by computing machine, this yield value is write to computation chip register GP1, GQ1, in GS1; (2), the resistive 1.0 times accuracy tests of 100%Ib point: retaking of a year or grade electric energy meter detects the error amount on stage body again, judge whether in specialized range? if this value judges resistive 1.0 accuracy corrections and completes in specialized range, execution step (3) simultaneously; Otherwise, return to step (1); (3), accuracy test under the perceptual 0.5L of 100%Ib point: read electric energy meter and detect the error amount on stage body, this value detects after stage body calculates and draws yield value through electric energy meter, by computing machine, this yield value is write in computation chip register Gphs1; (4), accuracy test under the perceptual 0.5L of 100%Ib point: retaking of a year or grade electric energy meter detects the error amount on stage body again, judge whether in specialized range? if this value judges perceptual 0.5L accuracy correction and completes in specialized range, execution step (5) simultaneously; Otherwise, return to step (3); (5), the resistive 1.0 times accuracy tests of 5%Ib point: read electric energy meter and detect the error amount on stage body, this value detects after stage body calculates and draws yield value through electric energy meter, by computing machine, this yield value is write in computation chip register POFFSET; (6), the resistive 1.0 times accuracy tests of 5%Ib point: retaking of a year or grade electric energy meter detects the error amount on stage body again, judge whether in specialized range? if this value in specialized range, judges electric energy meter small-signal bias correction and completes; Otherwise, return to step (5).The bearing calibration of above-mentioned electric energy meter small-signal biasing has the following disadvantages: front four steps are because accuracy requirement is lower, make the operand of electric energy meter detection stage body less, therefore correction rate is very fast, and along with the precision of 5%Ib point resistive 1.0 is higher, therefore make operating in more than 100 seconds of this step, this is the just correction of a passage also, proofreaies and correct the precision of second channel or the precision of 2%Ib point resistive 1.0 if also need, and the time taken is twice or more.Greatly affect the correction rate of electric energy meter small-signal biasing so long correction time, also reduced the production efficiency of electric energy meter simultaneously.
Summary of the invention
The technical problem to be solved in the present invention is that the bearing calibration of the fast electric energy meter small-signal biasing of a kind of correction rate is provided.
Technical scheme of the present invention is that the bearing calibration that provides a kind of electric energy meter small-signal to setover, comprises the following steps:
(1), the resistive 1.0 times accuracy tests of 100%Ib point: read and need correcting electric energy meter to detect the error amount on stage body, this value detects after stage body calculates and draws yield value through electric energy meter, by computing machine, this yield value is write and needs the computation chip of correcting electric energy meter register GP1, GQ1, in GS1;
(2), the resistive 1.0 times accuracy tests of 100%Ib point: retaking of a year or grade electric energy meter detects the error amount on stage body again, judge whether in specialized range? if this value judges resistive 1.0 accuracy corrections and completes in specialized range, execution step (3) simultaneously; Otherwise, return to step (1);
(3), accuracy test under the perceptual 0.5L of 100%Ib point: read and need correcting electric energy meter electric energy meter to detect the error amount on stage body, this value detects after stage body calculates and draws yield value through electric energy meter, by computing machine, this yield value is write and is needed in the computation chip of correcting electric energy meter register Gphs1;
(4), accuracy test under the perceptual 0.5L of 100%Ib point: retaking of a year or grade electric energy meter detects the error amount on stage body again, judge whether in specialized range? if this value judges perceptual 0.5L accuracy correction and completes in specialized range, execution step (5) simultaneously; Otherwise, return to step (3);
(5), adjust the value of current channel digital gain register that needs correcting electric energy meter computation chip inside, this value is adjusted to N doubly from 1 times, the table constant that correspondingly electric energy meter is detected to stage body internal standard table is simultaneously adjusted to N doubly by 1 times;
(6), the resistive 1.0 times accuracy tests of 5%Ib point: read electric energy meter and detect the error amount on stage body, this value detects after stage body calculates and draws yield value through electric energy meter, by computing machine, this yield value is write in computation chip register POFFSET;
(7), the resistive 1.0 times accuracy tests of 5%Ib point: retaking of a year or grade electric energy meter detects the error amount on stage body again, judge whether in specialized range? if this value is in specialized range, judge that electric energy meter small-signal bias correction completes, simultaneously execution step (8); Otherwise, return to step (5);
(8), adjust the value of the current channel digital gain register that needs correcting electric energy meter computation chip inside, this value is doubly adjusted to 1 times from N, the table constant that correspondingly electric energy meter is detected to stage body internal standard table is doubly adjusted to 1 times by N simultaneously, and the correction of electric energy meter small-signal biasing completes.
Described N is 8.
Adopt after above structure, the present invention compared with prior art, has the following advantages:
The bearing calibration of electric energy meter small-signal biasing of the present invention is by improving by need the current channel digital gain register of correcting electric energy meter computation chip inside and the table constant of standard scale to improve N method doubly simultaneously the pulse multiple that table is counted, that is to say that only need to read continuously 4-5 full sized pules number (umber of pulse in the namely unit interval increases greatly) can obtain error amount, originally needed 32-40 full sized pules number just can obtain, therefore the time that obtains error amount shortens greatly, this has also accelerated the correction rate of electric energy meter small-signal biasing, also improved the production efficiency of electric energy meter simultaneously.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described.
The bearing calibration of a kind of electric energy meter small-signal biasing of the present invention, comprises the following steps:
(1), the resistive 1.0 times accuracy tests of 100%Ib point: read and need correcting electric energy meter to detect the error amount on stage body, this value detects after stage body calculates and draws yield value through electric energy meter, by computing machine, this yield value is write and needs the computation chip of correcting electric energy meter register GP1, GQ1, in GS1;
(2), the resistive 1.0 times accuracy tests of 100%Ib point: retaking of a year or grade electric energy meter detects the error amount on stage body again, judge whether in specialized range? if this value judges resistive 1.0 accuracy corrections and completes in specialized range, execution step (3) simultaneously; Otherwise, return to step (1);
(3), accuracy test under the perceptual 0.5L of 100%Ib point: read and need correcting electric energy meter electric energy meter to detect the error amount on stage body, this value detects after stage body calculates and draws yield value through electric energy meter, by computing machine, this yield value is write and is needed in the computation chip of correcting electric energy meter register Gphs1;
(4), accuracy test under the perceptual 0.5L of 100%Ib point: retaking of a year or grade electric energy meter detects the error amount on stage body again, judge whether in specialized range? if this value judges perceptual 0.5L accuracy correction and completes in specialized range, execution step (5) simultaneously; Otherwise, return to step (3);
(5), adjust the value of the current channel digital gain register that needs correcting electric energy meter computation chip inside, this value is adjusted to N doubly from 1 times, the table constant that correspondingly electric energy meter is detected to stage body internal standard table is adjusted to N doubly by 1 times simultaneously, note after 8 times of gains, not exceeding chip full scale here, the about 600mV of effective value; Be exactly ADCCON (59H) register to ATT7053BU, be exactly DGain (5AH) to ATT7035/7037, the corresponding table constant that amplifies on year-on-year basis standard scale is (if the table constant of design is 1600, here just need to be adjusted into 1600*8=12800), now, by the resistive 1.0 times measuring accuracies of stage body 5%Ib point, the time that goes out pulse this time will have been improved 8 times with respect to speed before.
(6), the resistive 1.0 times accuracy tests of 5%Ib point: read electric energy meter and detect the error amount on stage body, this value detects after stage body calculates and draws yield value through electric energy meter, by computing machine, this yield value is write in computation chip register POFFSET;
(7), the resistive 1.0 times accuracy tests of 5%Ib point: retaking of a year or grade electric energy meter detects the error amount on stage body again, judge whether in specialized range? if this value is in specialized range, judge that electric energy meter small-signal bias correction completes, simultaneously execution step (8); Otherwise, return to step (5);
(8), adjust the value of the current channel digital gain register that needs correcting electric energy meter computation chip inside, this value is doubly adjusted to 1 times from N, the table constant that correspondingly electric energy meter is detected to stage body internal standard table is doubly adjusted to 1 times by N simultaneously, and the correction of electric energy meter small-signal biasing completes.
Described N is 8.
Below be only described with regard to most preferred embodiment of the present invention, but can not be interpreted as it is limitations on claims.The present invention is not limited only to above embodiment, and its concrete structure allows to change.In every case the various variations of doing in the protection domain of independent claims of the present invention are all in protection scope of the present invention.
Claims (2)
1. a bearing calibration for electric energy meter small-signal biasing, is characterized in that: comprise the following steps:
(1), the resistive 1.0 times accuracy tests of 100%Ib point: read and need correcting electric energy meter to detect the error amount on stage body, this value detects after stage body calculates and draws yield value through electric energy meter, by computing machine, this yield value is write and needs the computation chip of correcting electric energy meter register GP1, GQ1, in GS1;
(2), the resistive 1.0 times accuracy tests of 100%Ib point: retaking of a year or grade electric energy meter detects the error amount on stage body again, judge whether in specialized range? if this value judges resistive 1.0 accuracy corrections and completes in specialized range, execution step (3) simultaneously; Otherwise, return to step (1);
(3), accuracy test under the perceptual 0.5L of 100%Ib point: read and need correcting electric energy meter electric energy meter to detect the error amount on stage body, this value detects after stage body calculates and draws yield value through electric energy meter, by computing machine, this yield value is write and is needed in the computation chip of correcting electric energy meter register Gphs1;
(4), accuracy test under the perceptual 0.5L of 100%Ib point: retaking of a year or grade electric energy meter detects the error amount on stage body again, judge whether in specialized range? if this value judges perceptual 0.5L accuracy correction and completes in specialized range, execution step (5) simultaneously; Otherwise, return to step (3);
(5), adjust the value of current channel digital gain register that needs correcting electric energy meter computation chip inside, this value is adjusted to N doubly from 1 times, the table constant that correspondingly electric energy meter is detected to stage body internal standard table is simultaneously adjusted to N doubly by 1 times;
(6), the resistive 1.0 times accuracy tests of 5%Ib point: read electric energy meter and detect the error amount on stage body, this value detects after stage body calculates and draws yield value through electric energy meter, by computing machine, this yield value is write in computation chip register POFFSET;
(7), the resistive 1.0 times accuracy tests of 5%Ib point: retaking of a year or grade electric energy meter detects the error amount on stage body again, judge whether in specialized range? if this value is in specialized range, judge that electric energy meter small-signal bias correction completes, simultaneously execution step (8); Otherwise, return to step (5);
(8), adjust the value of the current channel digital gain register that needs correcting electric energy meter computation chip inside, this value is doubly adjusted to 1 times from N, the table constant that correspondingly electric energy meter is detected to stage body internal standard table is doubly adjusted to 1 times by N simultaneously, and the correction of electric energy meter small-signal biasing completes.
2. the bearing calibration of electric energy meter small-signal biasing according to claim 1, is characterized in that: described N is 8.
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| CN104360303A (en) * | 2014-11-04 | 2015-02-18 | 江阴长仪集团有限公司 | Method for verifying self-calibration error along with voltage fluctuation on basis of intelligent ammeters |
| CN106383329A (en) * | 2016-08-31 | 2017-02-08 | 西安亮丽仪器仪表有限责任公司 | Error correction method of single-phase electric energy meter |
| CN107782938A (en) * | 2017-09-14 | 2018-03-09 | 宁波三星医疗电气股份有限公司 | The error compensating method of electric energy meter self-heating |
| CN108318721A (en) * | 2018-01-18 | 2018-07-24 | 宁波三星医疗电气股份有限公司 | A kind of twin-core electric energy meter method for managing security |
| CN108710100A (en) * | 2018-06-20 | 2018-10-26 | 宁波三星智能电气有限公司 | A kind of correction method of register electric energy meter |
| CN109901099A (en) * | 2019-03-04 | 2019-06-18 | 宁波三星医疗电气股份有限公司 | A kind of voltage change automatic compensating method of electric energy meter |
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| CN108318721A (en) * | 2018-01-18 | 2018-07-24 | 宁波三星医疗电气股份有限公司 | A kind of twin-core electric energy meter method for managing security |
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| CN108710100B (en) * | 2018-06-20 | 2021-03-09 | 宁波三星智能电气有限公司 | Meter calibration method for electric energy meter of meter counter |
| CN109901099A (en) * | 2019-03-04 | 2019-06-18 | 宁波三星医疗电气股份有限公司 | A kind of voltage change automatic compensating method of electric energy meter |
| CN109901099B (en) * | 2019-03-04 | 2022-04-26 | 宁波三星医疗电气股份有限公司 | Automatic voltage change compensation method for electric energy meter |
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