CN205333845U - Online error testing arrangement of electric energy meter - Google Patents
Online error testing arrangement of electric energy meter Download PDFInfo
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- CN205333845U CN205333845U CN201620086203.1U CN201620086203U CN205333845U CN 205333845 U CN205333845 U CN 205333845U CN 201620086203 U CN201620086203 U CN 201620086203U CN 205333845 U CN205333845 U CN 205333845U
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Abstract
The utility model discloses an online error testing arrangement of electric energy meter, it includes microcontroller, electric energy chip, the pulse input circuit, the adapter circuit is gathered to the electric current, the voltage acquisition adapter circuit, communication circuit and the power supply circuit who maintains the normal work of this testing arrangement, electric energy chip obtains the current signal and the voltage signal on cable fetch way, microcontroller gathers the high -frequency pulse signal of the reflection circuit electric energy watt level that is recorded by this electric energy chip and is surveyed the low frequency pulse signal of the reflection circuit electric energy watt level that the electric energy meter recorded and exported, this microcontroller reachs this measuring error who is surveyed the electric energy meter according to high -frequency pulse signal, the low frequency pulse signal who gathers and each the parameter information processing who is surveyed the electric energy meter. It has following advantage: the anti -electromagnetic interference performance is strong, simple structure, it is small, portable.
Description
Technical field
This utility model relates to the online error testing device of a kind of electric energy meter, particularly relate to a kind of portablely, the online error testing device of jamproof electric energy meter。
Background technology
Require when carrying out the test of Clusters immunity to interference can normally measure while applying interference according to electric energy meter type evaluation outline JJF1245.1-2010 " installing type electric energy meter type evaluation outline General Requirement " regulation electric energy meter, and the measuring accuracy of electric energy meter must meet the requirement that respective standard specifies, therefore the calibration equipment when doing the test of Clusters immunity to interference, the measurement of electric energy meter measuring accuracy adopted need to have good noiseproof feature, and the calibration equipment meeting this test request at present is generally bulky, expensive。Another is a kind of is adopt electric energy meter on-site calibrator that the error (precision) of tested electric energy meter is carried out real-time in-line testing, although electric energy meter on-site calibrator can realize the on air real time test of tested electric energy meter error, but this series products many employings ADC change-over circuit and DSP data processing circuit are constituted, it is applicable to the error checking under purer glitch-free working environment, do not consider the on-line testing under the environment that electromagnetic interference is bigger or when carrying out the immunity to interference tests such as electromagnetic compatibility, under the environment that electromagnetic interference is bigger, this kind equipment is often disturbed and cisco unity malfunction, even if plus substantial amounts of anti-interference filtration circuit on the circuit being connected with tester, its effect is still undesirable。
Therefore, the electric energy meter error of prior art test device has the drawback that 1, electromagnetism interference poor performance, cannot normal operation under the environment that electromagnetic interference is bigger, it is impossible to realize the measurement of electric energy meter error；2, to meet the general volume of test device of requirement relatively big for electromagnetism interference performance, expensive, it has not been convenient to carry。
Utility model content
This utility model provides the online error testing device of a kind of electric energy meter, which overcomes the deficiencies in the prior art described in background technology。
This utility model solves its technical problem and be the technical scheme is that
A kind of online error testing device of electric energy meter, it includes microcontroller, electric energy computation chip, pulse input circuit, current acquisition adapter circuit, voltage acquisition adapter circuit, the power circuit of telecommunication circuit and this test device normal operation of maintenance, this telecommunication circuit for being connected and obtain each parameter information of tested electric energy meter with tested electric energy meter data communication, this electric energy computation chip connects and passes through this current acquisition adapter circuit, voltage acquisition adapter circuit obtains current signal and the voltage signal of circuit, this microcontroller connects electric energy computation chip and gathers the high-frequency pulse signal of the reflection circuit electric energy watt level recorded by this electric energy computation chip, this microcontroller is connected pulse input circuit and is gathered the low frequency pulse signal of the reflection circuit electric energy watt level that tested electric energy meter records and exports by this pulse input circuit；This microcontroller processes, according to each parameter information of the high-frequency pulse signal gathered, low frequency pulse signal and tested electric energy meter, the measurement error drawing this tested electric energy meter。
Among one embodiment: described pulse input circuit includes the filter circuit of the interference signal for filtering the low frequency pulse signal exported from tested electric energy meter and for low frequency pulse signal changes into the pulse input change-over circuit of the signal of telecommunication that applicable microcontroller gathers, the input of this filter circuit is for being connected with tested electric energy meter, the outfan of this filter circuit connects the input of pulse input change-over circuit, and the outfan of pulse input change-over circuit connects described microcontroller。
Among one embodiment: also include display module, connect microcontroller, for each parameter information of display error information and tested electric energy meter。
Among one embodiment: also include LED pulse display lamp, connect microcontroller, be used for indicating this test device whether normal operation。
Among one embodiment: also include keyboard input module, connect microcontroller, for this test device is carried out key-press input setting。
Among one embodiment: described telecommunication circuit is based on RS485 telecommunication circuit。
Among one embodiment: described electric energy computation chip adopts model to be the electric energy computation chip of ATT7026E。
The technical program is compared with background technology, and it has the advantage that
1, this utility model passes through the main devices adopting the electric energy computation chip that anti-interference is stronger to obtain circuit electric energy power as test device, and utilize the high-frequency impulse output function of electric energy computation chip to export the circuit electric energy power of its acquisition to microcontroller in the way of high-frequency pulse signal, when making error checking, the microcontroller of test device gathers the low frequency pulse signal exported from tested electric energy meter and from the high-frequency pulse signal of electric energy computation chip output and according to this high-frequency pulse signal simultaneously, each parameter information of low frequency pulse signal and tested electric energy meter processes the measurement error drawing this tested electric energy meter, realize under the environment that electromagnetic interference is bigger, the online error (precision) of tested electric energy meter is measured by test device, electromagnetism interference performance is strong。
2, the error testing device simple in construction of electric energy meter described in the utility model, volume is little, it is simple to carry。
3, test device just can be made to be connected with tested electric energy meter data communication by telecommunication circuit, make test device can pass through this Data Communications Channel automatically read each parameter information of tested electric energy meter and carry out oneself's coupling, without being manually entered any data, easy to use。
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail。
Fig. 1 depicts electrical block diagram and the circuit connection diagram of test device described in the utility model and tested electric energy meter。
Detailed description of the invention
Refer to Fig. 1, a kind of online error testing device 200 of electric energy meter, it includes microcontroller 1, electric energy computation chip 2, pulse input circuit 3, current acquisition adapter circuit 4, voltage acquisition adapter circuit 5, the power circuit 7 of telecommunication circuit 6 and this test device 200 normal operation of maintenance, this telecommunication circuit 6 for being connected and obtain each parameter information of tested electric energy meter 100 with tested electric energy meter data communication, in the present embodiment, described telecommunication circuit 6 is based on RS485 telecommunication circuit, this electric energy computation chip 2 connects and passes through this current acquisition adapter circuit 4, voltage acquisition adapter circuit 5 obtains current signal and the voltage signal of circuit, this microcontroller 1 connects electric energy computation chip 2 and gathers the high-frequency pulse signal of the reflection circuit electric energy watt level recorded by this electric energy computation chip 2, this microcontroller 1 is connected pulse input circuit 3 and is gathered the low frequency pulse signal of the reflection circuit electric energy watt level that tested electric energy meter 100 records and exports by this pulse input circuit 3；This microcontroller 1 processes, according to each parameter information of the high-frequency pulse signal gathered, low frequency pulse signal and tested electric energy meter 100, the measurement error drawing this tested electric energy meter 100。In the present embodiment, the single-chip microcomputer that this microcontroller 1 adopts model to be M430F5438。
Described pulse input circuit 3 includes the filter circuit 31 of the interference signal for filtering the low frequency pulse signal exported from tested electric energy meter and for low frequency pulse signal changes into the pulse input change-over circuit 32 of the signal of telecommunication that applicable microcontroller gathers, the input of this filter circuit 31 is for being connected with tested electric energy meter 100, the outfan of this filter circuit 31 connects the input of pulse input change-over circuit 32, and the outfan of pulse input change-over circuit 32 connects described microcontroller 1。
This power circuit 7 is linear power source circuit, directly from power taking voltage source, after then carrying out blood pressure lowering process, powers to each circuit module of this test device 200, to maintain its normal operation。
This current acquisition adapter circuit 4 includes current transformer and load resistance, and current transformer gathers line current and by load resistance, the current signal of collection is converted into the voltage signal that applicable electric energy computation chip 2 gathers。Voltage acquisition adapter circuit 5 includes resistance pressure-dividing network, and the high voltage of circuit is carried out dividing potential drop and is converted into the low-voltage signal that applicable electric energy computation chip 2 gathers by this resistance pressure-dividing network。
In the present embodiment, this test device 200 also includes display module 8, and it connects microcontroller 1, for each parameter information of display error information and tested electric energy meter 100。This display module 8 can adopt LCD display。
In the present embodiment, this test device also includes LED pulse display lamp 9, and it connects microcontroller 1, is used for indicating this test device 200 whether normal operation。
In the present embodiment, this test device 200 also includes keyboard input module 10, connects microcontroller 1, for this test device 200 is carried out key-press input setting。
Preferably, the electric energy computation chip that described electric energy computation chip 2 adopts model to be ATT7026E。
When this test device 200 needs tested electric energy meter 100 is tested, tested electric energy meter 100 and test device 200 are attempted by simultaneously the two ends of voltage source 400, tested electric energy meter 100 and test device 200 are sequentially connected in series on current source 300, the circuit electric energy power making tested electric energy meter 100 and test device 200 input is essentially equal, then is communicated to connect by telecommunication circuit 6 with tested electric energy meter 100 by test device 200。
Before starting test, test device 200 reads the basic parameter information such as the rated voltage of tested electric energy meter 100, rated current, meter constant by this telecommunication circuit 6, and initializes internal operation parameter, it is achieved automatically mate with the parameter of tested electric energy meter 100。
When starting error testing, tested electric energy meter 100 is to testing device 200 output low frequency pulse signal, this low frequency pulse signal circuit 31 after filtering filters external interference signals input pulse input change-over circuit 32, converted one-tenth is gathered by microcontroller 1 after being suitable for the signal of telecommunication that microcontroller 1 gathers, electric energy computation chip 2 also exports high-frequency pulse signal to microcontroller 1 simultaneously, microcontroller 1 gathers this low frequency pulse signal and high-frequency pulse signal in real time, when microcontroller 1 collects a upper pulse of neighboring low pulse, reset the counting to high-frequency pulse signal immediately and the umber of pulse of high-frequency pulse signal is counted again, counting the high-frequency impulse number that this two adjacent low-frequency pulse cycle inside counting the obtained rated voltage in conjunction with tested electric energy meter is stopped when microcontroller 1 collects next neighboring low pulse, rated current, the essential informations such as meter constant calculate the current real time measure error obtaining tested electric energy meter 100, microcontroller 1 resets high-frequency impulse enumerator after having calculated and again counts, so go round and begin again and obtain the Real-time Error of tested electric energy meter 100。The Real-time Error calculated is shown by display module 8, and user can pass through the contents such as keyboard input module 10 switching display Real-time Error, high-frequency impulse count value, the tested each parameter information of electric energy meter。Whether LED pulse display lamp 9 often collects a low-frequency pulse and namely glimmers once, to indicate test device collecting work normal。
Test device described in the utility model is applicable to single-phase and three-phase electric energy meter error metric。
The above, be only this utility model preferred embodiment, therefore can not limit the scope that this utility model is implemented according to this, and the equivalence namely made according to this utility model the scope of the claims and description changes and modifies, and all should still belong in the scope that this utility model is contained。
Claims (7)
1. the online error testing device of an electric energy meter, it is characterized in that: include microcontroller, electric energy computation chip, pulse input circuit, current acquisition adapter circuit, voltage acquisition adapter circuit, the power circuit of telecommunication circuit and this test device normal operation of maintenance, this telecommunication circuit for being connected and obtain each parameter information of tested electric energy meter with tested electric energy meter data communication, this electric energy computation chip connects and passes through this current acquisition adapter circuit, voltage acquisition adapter circuit obtains current signal and the voltage signal of circuit, this microcontroller connects electric energy computation chip and gathers the high-frequency pulse signal of the reflection circuit electric energy watt level recorded by this electric energy computation chip, this microcontroller is connected pulse input circuit and is gathered the low frequency pulse signal of the reflection circuit electric energy watt level that tested electric energy meter records and exports by this pulse input circuit；This microcontroller processes, according to each parameter information of the high-frequency pulse signal gathered, low frequency pulse signal and tested electric energy meter, the measurement error drawing this tested electric energy meter。
2. the online error testing device of a kind of electric energy meter according to claim 1, it is characterized in that: described pulse input circuit includes the filter circuit of the interference signal for filtering the low frequency pulse signal exported from tested electric energy meter and for low frequency pulse signal changes into the pulse input change-over circuit of the signal of telecommunication that applicable microcontroller gathers, the input of this filter circuit is for being connected with tested electric energy meter, the outfan of this filter circuit connects the input of pulse input change-over circuit, and the outfan of pulse input change-over circuit connects described microcontroller。
3. the online error testing device of a kind of electric energy meter according to claim 2, it is characterised in that: also include display module, connect microcontroller, for each parameter information of display error information and tested electric energy meter。
4. the online error testing device of a kind of electric energy meter according to claim 3, it is characterised in that: also include LED pulse display lamp, connect microcontroller, be used for indicating this test device whether normal operation。
5. the online error testing device of a kind of electric energy meter according to claim 4, it is characterised in that: also include keyboard input module, connect microcontroller, for this test device is carried out key-press input setting。
6. the online error testing device of a kind of electric energy meter according to any one of claim 1-5, it is characterised in that: described telecommunication circuit is based on RS485 telecommunication circuit。
7. the online error testing device of a kind of electric energy meter according to claim 6, it is characterised in that: described electric energy computation chip adopts model to be the electric energy computation chip of ATT7026E。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620086203.1U CN205333845U (en) | 2016-01-28 | 2016-01-28 | Online error testing arrangement of electric energy meter |
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| CN201620086203.1U CN205333845U (en) | 2016-01-28 | 2016-01-28 | Online error testing arrangement of electric energy meter |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106646334A (en) * | 2017-03-06 | 2017-05-10 | 中国电力科学研究院 | Method and system for calculating metering error of electric energy meter |
| CN106842108A (en) * | 2017-03-22 | 2017-06-13 | 国网重庆市电力公司电力科学研究院 | A kind of portable car-mounted direct current energy meter on-line measuring device |
| CN107479020A (en) * | 2017-07-24 | 2017-12-15 | 杭州华罡智能科技有限公司 | Single-phase measurement Fault Identification device and processing method |
| CN108152776A (en) * | 2017-11-23 | 2018-06-12 | 北京无线电计量测试研究所 | A kind of portable digital table characteristic measuring device |
| CN113466777A (en) * | 2021-06-06 | 2021-10-01 | 国网河北省电力有限公司辛集市供电分公司 | Intelligent electric energy meter error rapid determination device |
-
2016
- 2016-01-28 CN CN201620086203.1U patent/CN205333845U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106646334A (en) * | 2017-03-06 | 2017-05-10 | 中国电力科学研究院 | Method and system for calculating metering error of electric energy meter |
| CN106646334B (en) * | 2017-03-06 | 2021-06-15 | 中国电力科学研究院 | Method and system for calculating metering error of electric energy meter |
| CN106842108A (en) * | 2017-03-22 | 2017-06-13 | 国网重庆市电力公司电力科学研究院 | A kind of portable car-mounted direct current energy meter on-line measuring device |
| CN107479020A (en) * | 2017-07-24 | 2017-12-15 | 杭州华罡智能科技有限公司 | Single-phase measurement Fault Identification device and processing method |
| CN108152776A (en) * | 2017-11-23 | 2018-06-12 | 北京无线电计量测试研究所 | A kind of portable digital table characteristic measuring device |
| CN113466777A (en) * | 2021-06-06 | 2021-10-01 | 国网河北省电力有限公司辛集市供电分公司 | Intelligent electric energy meter error rapid determination device |
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