CN202330695U - Electric energy meter calibrating device capable of conducting dual-track error calculation - Google Patents
Electric energy meter calibrating device capable of conducting dual-track error calculation Download PDFInfo
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- CN202330695U CN202330695U CN2011204336263U CN201120433626U CN202330695U CN 202330695 U CN202330695 U CN 202330695U CN 2011204336263 U CN2011204336263 U CN 2011204336263U CN 201120433626 U CN201120433626 U CN 201120433626U CN 202330695 U CN202330695 U CN 202330695U
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Abstract
An electric energy meter calibrating device comprises a calibrated meter and a standard meter, wherein the calibrated meter outputs a fundamental wave active power pulse, a fundamental wave reactive power pulse, a harmonic wave active power pulse, a harmonic wave reactive power pulse, a full wave active power pulse and a full wave reactive power pulse; the standard meter outputs a standard fundamental wave pulse, a standard harmonic wave pulse and a standard full wave pulse; the calibrated meter is connected with a sampling system; the standard meter is connected with a standard system; and the sampling system takes two pulse signals from the fundamental wave pulses, the harmonic wave pulses and the full wave pulses and compares the two pulse signals with those of the standard fundamental wave pulse, the standard harmonic wave pulse and the standard full wave pulse of the standard meter so as to calculate the metering error.
Description
(1) technical field
The utility model relates to a kind of electric energy meter calibrating apparatus.
(2) background technology
As shown in Figure 1, traditional electric energy meter is generally induction type electric energy meter, adopts photoelectric sampler to take a sample, and includes meter degree rotating disk, is called for short stem-winder.Its function singleness is only made electric energy metrical and is used.And its function of measuring is also single, can only measure active energy or reactive energy, and is wherein a kind of.Its checking procedure is: electric energy meter calibrating apparatus is given standard scale and certain voltage, the electric current of seized table, and main control singlechip is given the next single-chip microcomputer with conversion factor and startup calculation command.The electric energy of standard scale is exported with impulse form, sends to the error calculation unit of slave computer through shaping circuit; The electric energy of seized table converts pulse with the form output of register dial rotation into through photoelectric sampler, delivers to the error calculation unit of slave computer again through shaping circuit; The error calculation unit of slave computer sends to the two-way pulse calculating of comparing the charactron display unit with error and shows.Therefore, traditional Error Calculation system meets traditional electrical energy meter calibration.
Along with development of electronic technology and application, electronic electric energy meter has captured most of market share, and these products have also embedded CPU, FPGA, ARM technology to some extent, and it is powerful.With the three phase harmonic electric energy meter is example; The output pulse relevant with error has all-wave pulse, first-harmonic pulse, harmonic pulse; If use traditional electric energy meter calibrating apparatus verify error; Because it has only one road calibrated meter pulse input interface, automatically above-mentioned each the road pulse error of verification needs artificial plug input terminal.Therefore, new electric energy meter error computing system occurred, as shown in Figure 2, its electric energy meter error computing system more in the past has two improvement: replace photoelectric sampler with the optocoupler array module 1..This is for adapting to a kind of matching Design that electronic watch pulse OC output is adopted.2. increase the pulse choice module.This is actually a kind of N and selects one MUX, i.e. multi-way switch.Calibrated meter can insert the pulse choice module input with the seized pulse in each road through the optocoupler array module, and the main control singlechip module selects module to select the calibrated meter pulse automatically through gating pulse, thereby reaches the purpose of full-automatic check.
Yet the type that electric energy meter carries out error can be divided into all-wave error, first-harmonic sum of errors harmonic error (the all-wave error has comprised first-harmonic sum of errors harmonic error), and above-mentioned two kinds of electric energy meter calibrating apparatus can only detect the all-wave error, and can't provide above-mentioned three kinds of errors.
(3) summary of the invention
In order to overcome the deficiency that existing electric energy meter calibrating apparatus can only provide the all-wave error, the utility model provides a kind of electric energy meter calibrating apparatus that carries out the doubletracks system Error Calculation that provides all-wave error, three kinds of errors of first-harmonic sum of errors harmonic error.
The technical scheme that the utility model solves its technical matters is: a kind of electric energy meter calibrating apparatus that carries out the doubletracks system Error Calculation; Comprise seized table, standard scale; The meritorious pulse of described seized table output first-harmonic, fundamental wave reactive power pulse, the meritorious pulse of harmonic wave, the idle pulse of harmonic wave, the meritorious pulse of all-wave, the idle pulse of all-wave, the pulse of described standard scale outputting standard first-harmonic, standard harmonic pulse and the pulse of standard all-wave;
Also comprise the optocoupler array module that is used for the output pulses switch of seized table is become Transistor-Transistor Logic level;
Also comprise the pulse choice module that is used for selecting two kinds of pulses from six kinds of pulses of seized table output; Described pulse choice module has six input ends of the meritorious pulse of the first-harmonic that receives seized table, fundamental wave reactive power pulse, the meritorious pulse of harmonic wave, the idle pulse of harmonic wave, the meritorious pulse of all-wave, the idle pulse of all-wave; Described pulse choice module has two output terminals; The output terminal of said optocoupler array module is connected with the input end of said pulse choice module; Two output terminals of said pulse choice module are connected with first shaping circuit, second shaping circuit that are used for signal is carried out shaping respectively, and the output terminal of the output terminal of said first shaping circuit, second shaping circuit forms two seized signal output parts;
Described standard scale has the two-way output terminal; Two output terminals of said standard scale are connected with the 3rd shaping circuit, the 4th shaping circuit that are used for signal is carried out shaping respectively, and the output terminal of the output terminal of said the 3rd shaping circuit, the 4th shaping circuit forms two standard signal output terminals;
Comprise that also the described pulse choice module of instruction selects wherein two-way input end and two-way output terminal UNICOM, and be used for from the pulse of standard first-harmonic, standard harmonic pulse, the pulse of standard all-wave of standard scale output select that wherein two-way pulse exports the control instruction module;
Also comprise computing module; Described computing module is connected to receive Error Calculation coefficient (constant) with described middle control instruction module; Described computing module comprises first error calculation unit and second error calculation unit that is used for the error of calculation, and described seized signal output part and standard signal output terminal all are connected with described first error calculation unit, second error calculation unit.
Further, be respectively equipped with first holding circuit, second holding circuit that is used for high voltage protective between described pulse choice module and described first shaping circuit, second shaping circuit.
The principle of work of the utility model is: seized table output pulse is connected to the input end of optocoupler array module, thereby becomes Transistor-Transistor Logic level to the pulses switch of seized table.The output terminal of optocoupler array module is connected to the input end of pulse choice module; The pulse choice module is actual to be that a N selects 2 electronic switch; It is connected with middle control instruction module, as required, the wherein two-way input signal of pulse choice module is connected to the two-way output terminal of pulse choice module.One road output terminal of pulse choice module connects first holding circuit in case extraneous high pressure is connected to first shaping circuit output signal as seized pulse.In like manner, another road output terminal of pulse choice module connects second holding circuit in case extraneous high pressure is connected to second shaping circuit output signal as seized pulse.
The pulse output of standard scale is switched by middle control instruction module control.The two-way output terminal one tunnel of standard scale is connected to the input end of the 3rd shaping circuit, and as full sized pules, another road is connected to the input end of the 4th shaping circuit by the 3rd shaping circuit output signal, exports signal as full sized pules by the 4th shaping circuit.As required; The standard first-harmonic pulse of standard scale output can be meritorious pulse of standard first-harmonic or the pulse of standard fundamental wave reactive power; The standard harmonic pulse of standard scale output can be meritorious pulse of standard harmonic or the idle pulse of standard harmonic; The standard all-wave pulse of standard scale output can be meritorious pulse of standard all-wave or the idle pulse of standard all-wave, with corresponding with the selected pulse signal of pulse choice module.
First error calculation unit, second error calculation unit receive seized pulse, full sized pules and Error Calculation coefficient (constant) and carry out Error Calculation, and connect the calculated value that liquid crystal display shows first error calculation unit and second error calculation unit.Thereby accomplish whole tasks of doubletracks system Error Calculation system.
The beneficial effect of the utility model is: for first-harmonic pulse, harmonic pulse and the all-wave pulse of seized table; And the standard first-harmonic pulse of standard scale, standard harmonic pulse and the pulse of standard all-wave; Can select wherein two group pulses to compare arbitrarily, thereby calculate error in dipping.
(4) description of drawings
Fig. 1 is the schematic diagram of existing a kind of electric energy meter calibrating apparatus.
Fig. 2 is the schematic diagram of existing another kind of electric energy meter calibrating apparatus.
Fig. 3 is the schematic diagram of the utility model.
(5) embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is done further explain.
With reference to Fig. 3; A kind of electric energy meter calibrating apparatus that carries out the doubletracks system Error Calculation; Comprise that (standard scale can be selected the patented product of our company for use for seized table 1, standard scale 2; Be that the patent No. is 200810120871.1 standard scale), the meritorious pulse of described seized table 1 output first-harmonic, fundamental wave reactive power pulse, the meritorious pulse of harmonic wave, the idle pulse of harmonic wave, the meritorious pulse of all-wave, the idle pulse of all-wave, described standard scale 2 outputting standard first-harmonic pulses, standard harmonic pulse and the pulse of standard all-wave.
Also comprise the optocoupler array module 3 that is used for the output pulses switch of seized table 1 is become Transistor-Transistor Logic level.
Also comprise the pulse choice module 4 that is used for selecting two kinds of pulses from six kinds of pulses of seized table 1 output; Described pulse choice module 4 has six input ends of the meritorious pulse of the first-harmonic that receives seized table, fundamental wave reactive power pulse, the meritorious pulse of harmonic wave, the idle pulse of harmonic wave, the meritorious pulse of all-wave, the idle pulse of all-wave; Described pulse choice module 4 has two output terminals; The output terminal of said optocoupler array module 3 is connected with the input end of said pulse choice module 4; Two output terminals of said pulse choice module 4 are connected with first shaping circuit 5, second shaping circuit 6 that are used for signal is carried out shaping respectively, and the output terminal of the output terminal of said first shaping circuit 5, second shaping circuit 6 forms two seized signal output parts.In the present embodiment, be respectively equipped with first holding circuit 7, second holding circuit 8 that are used for high voltage protective between described pulse choice module 4 and described first shaping circuit 5, second shaping circuit 6.
Described standard scale 2 has the two-way output terminal; Two output terminals of said standard scale 2 are connected with the 3rd shaping circuit 9, the 4th shaping circuit 10 that are used for signal is carried out shaping respectively, and the output terminal of the output terminal of said the 3rd shaping circuit 9, the 4th shaping circuit 10 forms two standard signal output terminals.
Comprise that also the described pulse choice module 4 of instruction selects wherein two-way input end and two-way output terminal UNICOM, and be used for from the pulse of standard first-harmonic, standard harmonic pulse, the pulse of standard all-wave of standard scale 2 output select that wherein two-way pulse exports control instruction module 11.
Also comprise computing module 12; Described computing module 12 is connected to receive Error Calculation coefficient (constant) with described middle control instruction module 11; Described computing module 12 comprises first error calculation unit 13 and second error calculation unit 14 that is used for the error of calculation, and described seized signal output part and standard signal output terminal all are connected with described first error calculation unit 13, second error calculation unit 14.
The principle of work of the utility model is: seized table 1 output pulse is connected to the input end of optocoupler array module 3, thereby becomes Transistor-Transistor Logic level to the pulses switch of seized table 1.The output terminal of optocoupler array module 3 is connected to the input end of pulse choice module 4; Pulse choice module 4 is actual to be that a N selects 2 electronic switch; It is connected with middle control instruction module 11; As required, the wherein two-way input signal of pulse choice module 4 is connected to the two-way output terminal of pulse choice module 4.One road output terminal of pulse choice module 4 connects first holding circuit 7 in case extraneous high pressure is connected to first shaping circuit, 5 output signals as seized pulse.In like manner, another road output terminal of pulse choice module 4 connects second holding circuit 8 in case extraneous high pressure is connected to second shaping circuit, 6 output signals as seized pulse.
The pulse output of standard scale 2 is switched by middle control instruction module 11 controls.The two-way output terminal one tunnel of standard scale 2 is connected to the input end of the 3rd shaping circuit 9; Export signals as full sized pules by the 3rd shaping circuit 9; Another road is connected to the input end of the 4th shaping circuit 10, exports signals as full sized pules by the 4th shaping circuit 10.As required; The standard first-harmonic pulse of standard scale output can be meritorious pulse of standard first-harmonic or the pulse of standard fundamental wave reactive power; The standard harmonic pulse of standard scale output can be meritorious pulse of standard harmonic or the idle pulse of standard harmonic; The standard all-wave pulse of standard scale output can be meritorious pulse of standard all-wave or the idle pulse of standard all-wave, with corresponding with pulse choice module 4 selected pulse signals.
First error calculation unit 13, second error calculation unit 14 receive seized pulse, full sized pules and Error Calculation coefficient (constant) and carry out Error Calculation, and connect the calculated value that liquid crystal display 15 shows first error calculation unit 13 and second error calculation unit 14.Thereby accomplish whole tasks of doubletracks system Error Calculation system.
Claims (2)
1. electric energy meter calibrating apparatus that carries out the doubletracks system Error Calculation; Comprise seized table, standard scale; The meritorious pulse of described seized table output first-harmonic, fundamental wave reactive power pulse, the meritorious pulse of harmonic wave, the idle pulse of harmonic wave, the meritorious pulse of all-wave, the idle pulse of all-wave; The pulse of described standard scale outputting standard first-harmonic, standard harmonic pulse and the pulse of standard all-wave is characterized in that:
Also comprise the optocoupler array module that is used for the output pulses switch of seized table is become Transistor-Transistor Logic level;
Also comprise the pulse choice module that is used for selecting two kinds of pulses from six kinds of pulses of seized table output; Described pulse choice module has six input ends of the meritorious pulse of the first-harmonic that receives seized table, fundamental wave reactive power pulse, the meritorious pulse of harmonic wave, the idle pulse of harmonic wave, the meritorious pulse of all-wave, the idle pulse of all-wave; Described pulse choice module has two output terminals; The output terminal of said optocoupler array module is connected with the input end of said pulse choice module; Two output terminals of said pulse choice module are connected with first shaping circuit, second shaping circuit that are used for signal is carried out shaping respectively, and the output terminal of the output terminal of said first shaping circuit, second shaping circuit forms two seized signal output parts;
Described standard scale has the two-way output terminal; Two output terminals of said standard scale are connected with the 3rd shaping circuit, the 4th shaping circuit that are used for signal is carried out shaping respectively, and the output terminal of the output terminal of said the 3rd shaping circuit, the 4th shaping circuit forms two standard signal output terminals;
Comprise that also the described pulse choice module of instruction selects wherein two-way input end and two-way output terminal UNICOM, and be used for from the pulse of standard first-harmonic, standard harmonic pulse, the pulse of standard all-wave of standard scale output select that wherein two-way pulse exports the control instruction module;
Also comprise computing module; Described computing module is connected to receive the Error Calculation coefficient with described middle control instruction module; Described computing module comprises first error calculation unit and second error calculation unit that is used for the error of calculation, and described seized signal output part and standard signal output terminal all are connected with described first error calculation unit, second error calculation unit.
2. the electric energy meter calibrating apparatus that carries out the doubletracks system Error Calculation as claimed in claim 1 is characterized in that: be respectively equipped with first holding circuit, second holding circuit that is used for high voltage protective between described pulse choice module and described first shaping circuit, second shaping circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204336263U CN202330695U (en) | 2011-10-28 | 2011-10-28 | Electric energy meter calibrating device capable of conducting dual-track error calculation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204336263U CN202330695U (en) | 2011-10-28 | 2011-10-28 | Electric energy meter calibrating device capable of conducting dual-track error calculation |
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| CN202330695U true CN202330695U (en) | 2012-07-11 |
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| CN2011204336263U Expired - Lifetime CN202330695U (en) | 2011-10-28 | 2011-10-28 | Electric energy meter calibrating device capable of conducting dual-track error calculation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105572625A (en) * | 2015-12-15 | 2016-05-11 | 国网辽宁省电力有限公司大连供电公司 | Reactive electric energy error automatic checking device |
| CN109116292A (en) * | 2018-11-14 | 2019-01-01 | 国网辽宁省电力有限公司盘锦供电公司 | A kind of pulse converter of high-voltage meter error testing |
-
2011
- 2011-10-28 CN CN2011204336263U patent/CN202330695U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105572625A (en) * | 2015-12-15 | 2016-05-11 | 国网辽宁省电力有限公司大连供电公司 | Reactive electric energy error automatic checking device |
| CN109116292A (en) * | 2018-11-14 | 2019-01-01 | 国网辽宁省电力有限公司盘锦供电公司 | A kind of pulse converter of high-voltage meter error testing |
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Granted publication date: 20120711 |
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| CX01 | Expiry of patent term |