CN103983938B - The bearing calibration of electric energy meter small-signal biasing - Google Patents
The bearing calibration of electric energy meter small-signal biasing Download PDFInfo
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- CN103983938B CN103983938B CN201410178047.7A CN201410178047A CN103983938B CN 103983938 B CN103983938 B CN 103983938B CN 201410178047 A CN201410178047 A CN 201410178047A CN 103983938 B CN103983938 B CN 103983938B
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Abstract
The invention discloses the bearing calibration of a kind of electric energy meter small-signal biasing, this bearing calibration is respectively under resistive 1.0 times of 100%Ib point, 100%Ib point perception 0.5L, the resistive 1.0 times accuracy tests of 5%Ib point.The correction rate of above-mentioned bearing calibration is fast.
Description
Technical field
The present invention relates to electric energy meter technical field, be especially the bearing calibration of a kind 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:
Reading the error amount on electric energy meter detection stage body, this value draws yield value after electric energy meter detection stage body calculates, and passes through computer
This yield value is write computation chip register GP1, in GQ1, GS1；(2), the resistive 1.0 times accuracy tests of 100%Ib point:
Error amount on retaking of a year or grade electric energy meter detection stage body again, it may be judged whether in prescribed limit？If this value is in prescribed limit, sentence
Disconnected resistive 1.0 accuracy corrections complete, and perform step (3) simultaneously；Otherwise, step (1) is returned；(3), 100%Ib point sense
Property 0.5L under accuracy test: read electric energy meter detection stage body on error amount, this value through electric energy meter detection stage body calculate after
Go out yield value, by computer by this yield value write computation chip register Gphs1；(4), 100%Ib point perception 0.5L
Lower accuracy test: the error amount on retaking of a year or grade electric energy meter detection stage body again, it may be judged whether in prescribed limit？If this value is on rule
Then judge in the range of Ding that perception 0.5L accuracy correction completes, and performs step (5) simultaneously；Otherwise, step (3) is returned；(5)、
The resistive 1.0 times accuracy tests of 5%Ib point: reading the error amount on electric energy meter detection stage body, this value detects stage body meter through electric energy meter
Yield value is drawn, by computer by this yield value write computation chip register POFFSET after calculation；(6), 5%Ib point
Resistive 1.0 times accuracy tests: the error amount on retaking of a year or grade electric energy meter detection stage body again, it may be judged whether in prescribed limit？If
This value in prescribed limit, then judges that electric energy meter small-signal bias correction completes；Otherwise, step (5) is returned.Above-mentioned electric energy
The bearing calibration of table small-signal biasing has the disadvantage that front four steps are relatively low due to required precision so that electric energy meter detects
The operand of stage body is less, and therefore correction rate is very fast, and along with the precision of 5%Ib point resistive 1.0 is higher, hence in so that
Operating in more than 100 seconds of this step, this also be a passage correction, if also need to correct second channel precision or
The precision of person 2%Ib point resistive 1.0, then the time taken is twice or more.So long greatly shadow correction time
Ring the correction rate of electric energy meter small-signal biasing, also reduce the production efficiency of electric energy meter simultaneously.
Summary of the invention
The technical problem to be solved in the present invention is to provide the bearing calibration of the fast electric energy meter small-signal biasing of a kind of correction rate.
The technical scheme is that, it is provided that the bearing calibration of a kind of electric energy meter small-signal biasing, comprise the following steps:
(1), the resistive 1.0 times accuracy tests of 100%Ib point: read the error amount needed on correcting electric energy meter detection stage body, this value
After electric energy meter detection stage body calculates, draw yield value, by computer, the write of this yield value is needed the metering core of correcting electric energy meter
Sheet register GP1, in GQ1, GS1；
(2), the resistive 1.0 times accuracy tests of 100%Ib point: the error amount on retaking of a year or grade electric energy meter detection stage body again, it is judged that be
No in prescribed limit？If this value is in prescribed limit, judges that resistive 1.0 accuracy corrections complete, perform step (3) simultaneously；
Otherwise, step (1) is returned；
(3), accuracy test under 100%Ib point perception 0.5L: read the error needed on correcting electric energy meter electric energy meter detection stage body
Value, this value draws yield value after electric energy meter detection stage body calculates, by computer, the write of this yield value is needed correcting electric energy meter
Computation chip register Gphs1 in；
(4), accuracy test under 100%Ib point perception 0.5L: the error amount on retaking of a year or grade electric energy meter detection stage body again, it is judged that
Whether in prescribed limit？If this value is in prescribed limit, judges that perception 0.5L accuracy correction completes, perform step simultaneously
(5)；Otherwise, step (3) is returned；
(5), the value needing the current channel digital gain register within correcting electric energy meter computation chip is adjusted, by this value from 1
It is adjusted to N times again, correspondingly the table constant of standard scale in electric energy meter monitor station body is adjusted to N times by 1 times simultaneously；
(6), the resistive 1.0 times accuracy tests of 5%Ib point: reading the error amount on electric energy meter detection stage body, this value is through electric energy meter
Detection stage body draws yield value after calculating, by computer by this yield value write computation chip register POFFSET；
(7), the resistive 1.0 times accuracy tests of 5%Ib point: the error amount on retaking of a year or grade electric energy meter detection stage body again, it may be judged whether
In prescribed limit？If this value is in prescribed limit, then judges that electric energy meter small-signal bias correction completes, perform step simultaneously
(8)；Otherwise, step (5) is returned；
(8), the value needing the current channel digital gain register within correcting electric energy meter computation chip is adjusted, by this value from N
It is adjusted to 1 times again, correspondingly the table constant of standard scale in electric energy meter monitor station body is adjusted to 1 times by N times, electric energy simultaneously
The correction of table small-signal biasing completes.
Described N is 8.
After using above structure, the present invention compared with prior art, has the advantage that
The bearing calibration of electric energy meter small-signal of the present invention biasing will be by needing the current channel within correcting electric energy meter computation chip
The table constant of digital gain register and standard scale improves the method for N times to improve the pulse multiple of table meter simultaneously, say, that
Have only to read 4-5 calibration pulse number (umber of pulse in the namely unit interval is greatly increased) continuously and i.e. can get error
Value, originally then need 32-40 calibration pulse number just can obtain, the time therefore obtaining error amount is greatly shortened, and this is also
Accelerate the correction rate of electric energy meter small-signal biasing, also improve the production efficiency of electric energy meter simultaneously.
Detailed description of the invention
Below in conjunction with specific embodiment, the invention will be further described.
The bearing calibration of the present invention a kind of electric energy meter small-signal biasing, comprises the following steps:
(1), the resistive 1.0 times accuracy tests of 100%Ib point: read the error amount needed on correcting electric energy meter detection stage body, this value
After electric energy meter detection stage body calculates, draw yield value, by computer, the write of this yield value is needed the metering core of correcting electric energy meter
Sheet register GP1, in GQ1, GS1；
(2), the resistive 1.0 times accuracy tests of 100%Ib point: the error amount on retaking of a year or grade electric energy meter detection stage body again, it is judged that be
No in prescribed limit？If this value is in prescribed limit, judges that resistive 1.0 accuracy corrections complete, perform step (3) simultaneously；
Otherwise, step (1) is returned；
(3), accuracy test under 100%Ib point perception 0.5L: read the error needed on correcting electric energy meter electric energy meter detection stage body
Value, this value draws yield value after electric energy meter detection stage body calculates, by computer, the write of this yield value is needed correcting electric energy meter
Computation chip register Gphs1 in；
(4), accuracy test under 100%Ib point perception 0.5L: the error amount on retaking of a year or grade electric energy meter detection stage body again, it is judged that
Whether in prescribed limit？If this value is in prescribed limit, judges that perception 0.5L accuracy correction completes, perform step simultaneously
(5)；Otherwise, step (3) is returned；
(5), the value needing the current channel digital gain register within correcting electric energy meter computation chip is adjusted, by this value from 1
It is adjusted to N times again, correspondingly the table constant of standard scale in electric energy meter monitor station body is adjusted to N times by 1 times simultaneously, note
Here chip full scale is not exceeded after 8 times of gains, virtual value about 600mV；It is exactly ADCCON (59H) to ATT7053BU
Register, is exactly DGain (5AH) to ATT7035/7037, amplifies the table constant of standard scale the most on year-on-year basis (if designed
Table constant be 1600, be accomplished by here being adjusted to 1600*8=12800), now by stage body 5%Ib point resistive 1.0 times
Measuring accuracy, the time going out pulse this time will improve 8 times relative to speed before.
(6), the resistive 1.0 times accuracy tests of 5%Ib point: reading the error amount on electric energy meter detection stage body, this value is through electric energy meter
Detection stage body draws yield value after calculating, by computer by this yield value write computation chip register POFFSET；
(7), the resistive 1.0 times accuracy tests of 5%Ib point: the error amount on retaking of a year or grade electric energy meter detection stage body again, it may be judged whether
In prescribed limit？If this value is in prescribed limit, then judges that electric energy meter small-signal bias correction completes, perform step simultaneously
(8)；Otherwise, step (5) is returned；
(8), the value needing the current channel digital gain register within correcting electric energy meter computation chip is adjusted, by this value from N
It is adjusted to 1 times again, correspondingly the table constant of standard scale in electric energy meter monitor station body is adjusted to 1 times by N times, electric energy simultaneously
The correction of table small-signal biasing completes.
Described N is 8.
Below only highly preferred embodiment of the present invention is described, but is not to be construed as limitations on claims.The present invention
Being not limited only to above example, its concrete structure allows to change.In every case in the protection domain of independent claims of the present invention
The various changes made are the most within the scope of the present invention.
Claims (2)
1. the bearing calibration of an electric energy meter small-signal biasing, it is characterised in that: comprise the following steps:
(1), the resistive 1.0 times accuracy tests of 100%Ib point: read the error amount needed on correcting electric energy meter detection stage body, this value
After electric energy meter detection stage body calculates, draw yield value, by computer, the write of this yield value is needed the metering core of correcting electric energy meter
Sheet register GP1, in GQ1, GS1；
(2), the resistive 1.0 times accuracy tests of 100%Ib point: the error amount on retaking of a year or grade electric energy meter detection stage body again, it is judged that be
No in prescribed limit？If this value is in prescribed limit, judges that resistive 1.0 accuracy corrections complete, perform step (3) simultaneously；
Otherwise, step (1) is returned；
(3), accuracy test under 100%Ib point perception 0.5L: read the error needed on correcting electric energy meter electric energy meter detection stage body
Value, this value draws yield value after electric energy meter detection stage body calculates, by computer, the write of this yield value is needed correcting electric energy meter
Computation chip register Gphs1 in；
(4), accuracy test under 100%Ib point perception 0.5L: the error amount on retaking of a year or grade electric energy meter detection stage body again, it is judged that
Whether in prescribed limit？If this value is in prescribed limit, judges that perception 0.5L accuracy correction completes, perform step simultaneously
(5)；Otherwise, step (3) is returned；
(5), the value needing the current channel digital gain register within correcting electric energy meter computation chip is adjusted, by this value from 1
It is adjusted to N times again, correspondingly the table constant of standard scale in electric energy meter monitor station body is adjusted to N times by 1 times simultaneously；
(6), the resistive 1.0 times accuracy tests of 5%Ib point: reading the error amount on electric energy meter detection stage body, this value is through electric energy meter
Detection stage body draws yield value after calculating, by computer by this yield value write computation chip register POFFSET；
(7), the resistive 1.0 times accuracy tests of 5%Ib point: the error amount on retaking of a year or grade electric energy meter detection stage body again, it may be judged whether
In prescribed limit？If this value is in prescribed limit, then judges that electric energy meter small-signal bias correction completes, perform step simultaneously
(8)；Otherwise, step (5) is returned；
(8), the value needing the current channel digital gain register within correcting electric energy meter computation chip is adjusted, by this value from N
It is adjusted to 1 times again, correspondingly the table constant of standard scale in electric energy meter monitor station body is adjusted to 1 times by N times, electric energy simultaneously
The correction of table small-signal biasing completes.
The bearing calibration of electric energy meter small-signal biasing the most according to claim 1, it is characterised in that: described N is 8.
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
| CN107782938B (en) * | 2017-09-14 | 2020-10-27 | 宁波三星医疗电气股份有限公司 | Self-heating error compensation method for electric energy meter |
| CN108318721B (en) * | 2018-01-18 | 2021-03-23 | 宁波三星医疗电气股份有限公司 | Safety management method for double-core electric energy meter |
| 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 |
| 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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