CN2147549Y - Intelligent electric power meter correcting gauge - Google Patents
Intelligent electric power meter correcting gauge Download PDFInfo
- Publication number
- CN2147549Y CN2147549Y CN 93201769 CN93201769U CN2147549Y CN 2147549 Y CN2147549 Y CN 2147549Y CN 93201769 CN93201769 CN 93201769 CN 93201769 U CN93201769 U CN 93201769U CN 2147549 Y CN2147549 Y CN 2147549Y
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- voltage
- current
- electric energy
- energy meter
- electric power
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- Expired - Fee Related
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- Measurement Of Resistance Or Impedance (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model discloses a correcting gauge which is suitable for verifying a three-phase three-wire system two elements intelligent electric power meter in a power utilization administration department. The utility model adopts a monolithic computer hardware system, so that a standard electric energy meter in the correcting gauge and other function circuits achieve unification; two standard electric power meters of impulse type in the existing correcting gauge are replaced by a standard electric power module by modular programming; the hardware is replaced by the software; the hardware circuits, such as a phase sequence judgment circuit, etc., are replaced by a judging module which can judge the wire connection correctly or wrongly; the function of judgment is enriched and the intellectualized degree is enhanced. The interface of the man-machine conversation is provided by adopting a dot array type liquid crystal display and a tactile keyboard. The utility model has the advantages of simple structure, full function, high precision and low cost, which is a novel full intelligent portable electric meter correcting gauge.
Description
A kind of multi-functional electrical measurement instrument that is suitable for management of power use department verification electric energy meter.
At present, the three-phase three-wire system two-part portable electric meter tester that management of power use department uses, by two expensive electronic impulse formula standard electric energy meters and the microcomputer data disposal system that is mainly used to calculate tested electric energy meter error in dipping, the hardware circuit that the wiring of differentiation voltage terminal is corrected errors is formed by combining, wherein, every standard electric energy meter is provided with electric energy measurement circuit and nixie display; The microcomputer data disposal system is provided with independently data acquisition, storage, nixie display, operates with circuit and devices such as keyboards.There is complex structure, problems such as volume is big, Heavy Weight, power consumption is big, cost is high, intelligent degree is low, the man-machine conversation function is weak.
The purpose of this utility model is to use the single-chip data acquisition disposal system, realize the intellectuality that all multi-functional modularization, wiring such as publicization, electrical energy meter calibration of unified, the sampled data of hardware system are corrected errors and differentiated, to solve the problem that existing electrical energy meter calibration instrument exists.
The utility model as shown in Figure 1, by voltage, current sensor plate (1), analog to digital converter plate (2), single-chip microcomputer plate (3), man-machine conversation plate (4), power panel formations such as (5).In conjunction with Fig. 3 realization of the present utility model is described as follows:
Voltage transformer (VT) (6) is primary side 100 hint voltage transition 3 volts of secondary voltages, and this signal one tunnel meets the I of analog switch (9)
1, another road meets the I of (9)
2Simultaneously through frequency dividing circuit (18) to single-chip microcomputer (20), the O of (9)
1Connect voltage sample retainer (13), power pack (7) is primary side 0～5 peace current transitions 0～3 volt of secondary singal, and this signal one tunnel meets the I of analog switch (9)
3, another road is to the I of (9)
4, the O of (9)
2Outlet signal one tunnel directly arrives the I of electric current Gear-shift switch (10)
1Input end, another Lu Zejing amplifier (11) is to the I of (10)
2Input end, the while is delivered to the input end of comparer (12) again.(12) output signal offers single-chip microcomputer (20), whether be used for discerning current signal less than certain certain value, if less than certain certain value, single-chip microcomputer (20) makes current signal be exaggerated the back from I by the position of the switch that the control end A of (10) changes electric current Gear-shift switch (10)
2Enter current sample by (10) and be retained to (14).Otherwise current signal is directly from I
1Enter current sample retainer (14) by (10).
Voltage sample protector (13), voltage, the current sampling signal of current sample retainer (14) enter analog to digital converter (17) by change-over switch (15) timesharing through emitter follower (16).Digital signal after (17) conversion is stored in RAM(22).
When carrying out electrical energy meter calibration, EPROM(21) the electrical energy meter calibration functional module in is called the electric energy metrical module and is come basis of calculation energy value, receive the metrical pulse that tested electric energy meter sends from pulse input port (30), call error calculating module and calculate, the results are shown on the dot matrix lcd (25) by the error in dipping of taking temperature.Thereby realized with soft standard scale being that the electric energy metrical module is the electrical energy meter calibration instrument of core.
The effect of frequency divider (18) is to improve strict and the synchronous controlling of sampling basic pulse of system frequency for sampling module.The effect of amplifier (11) is to improve the conversion accuracy of analog to digital converter (17) under little current signal.(19) be programmable parallel 1/0 expansion interface, the position of the switch that is used to read the analog to digital conversion result and controls analog switch (9), electric current Gear-shift switch (10), change-over switch (15).
Fig. 2 is the wiring diagram of voltage transformer (VT) (6) and power pack (7), and (6) contain two transformers, and it once has three voltage input ends; (7) contain two current transformers, and it once there are four input ends.These input ends can insert three-phase voltage and biphase current respectively.In order to guarantee the correctness of external cabling, the utility model at first called the wiring discrimination module of correcting errors before verification is taken temperature, according to RAM(22) in the electric current and voltage sampled value, carry out whether external cabling contact good, whether correct three-phase voltage phase sequence, biphase current are separate whether correctly reach the differentiation of the whole set of connections of electric current and voltage, and point out respectively on display (22) differentiating a result.Thereby realized hard with soft generation, enriched and differentiated content, improved reliability, reached the intellectuality that wiring is corrected errors and differentiated.
The program design of the utility model sampling structure.Be provided with selftest module, wiring correct errors discrimination module, meritorious and wattless power measurement module, meritorious and reactive energy-meter error estimator module, also be provided with parameter measurement modules such as voltage, current phase, power factor, frequency.The selection of these functional modules and the man-machine conversation functions such as supervision of ruuning situation, the operator can be undertaken by the touch formula keyboard (26) in the man-machine conversation plate (4), dot matrix lcd (25) under the control of watchdog routine.When maloperation occurring, automatic prompting operation method.
The present inventor has been an embodiment, and test result shows:
The electric energy metrical precision reaches 0.1 grade, and the power measurement precision reaches 0.1 grade, and frequency measurement accuracy reaches 0.01 grade, and voltage measurement precision and current measurement precision reach 0.2 grade; And its weight only is 3/5ths of existing portable tester; Cost only is about 6/10ths of existing portable tester.
Fig. 1 is the tester system construction drawing
Fig. 2 is voltage transformer (VT) (6), power pack (7) wiring diagram
Fig. 3 is the main signal wiring diagram of tester
Tester has 5 mainboards and constitutes: (1) is voltage, current sensor plate, is made up of (6), (7), (8) part; (2) the analog to digital converter plate is made up of (9), (10), (11), (12), (13), (14), (15), (16), (17), (18), (19) part; (3) the single-chip microcomputer plate is made up of (20), (21), (22), (23), (24); (4) man-machine conversation plate is made up of (25), (26), (27), (28), (29), (30); (5) power panel is made up of (31); (6) voltage transformer (VT), (7) power pack, (8) power transformer, (9) analog switch 4052, (10) the electric current Gear-shift switch 4053, (11) amplifier, (12) comparer, (13) voltage sample retainer LF398, (14) current sample retainer LF398, (15) change-over switch, (16) emitter follower LM310, (17) analog to digital converter AD574, (18) frequency divider, (19) 1/0 interfaces, (20) single-chip microcomputer 8098, (21) EPROM2764, (22) RAM6264, (23) reservoir 74HC373, (24) code translator 74LS138, (25) dot matrix lcd, (26) touch keyboard, (27) 1/0 interfaces, (28) 1/0 interfaces, (29) high-speed pulse delivery outlet, (30) pulse input port, (31) D.C. regulated power supply, ± 15 volts+6 volts+5 volts.The above-mentioned device that does not mark model all can adopt the custom circuit element to realize.
Claims (2)
1, a kind of the intelligent electric energy meter tester, it is by voltage, current sensor plate (1), analog to digital conversion plate (2), and the relevant device on single-chip microcomputer plate (3), man-machine conversation plate (4), power panel (5) and each plate constitutes; It is characterized in that: the secondary singal one tunnel of voltage transformer (VT) (6) meets the l of analog switch (9)
1, another road meets the l of (9)
2Simultaneously through frequency dividing circuit (18) to single-chip microcomputer (20), the O of (9)
1Connect voltage sample retainer (13), the secondary singal one tunnel of power pack (7) meets the l of analog switch (9)
3, another road is to the l of (9)
4, the O of (9)
2Outlet signal one tunnel directly arrives the l of electric current Gear-shift switch (10)
1Input end, another road is through the l of amplifier (11) to (10)
2Input end, the while is delivered to an input end of comparer (12) again; (12) output signal is delivered to single-chip microcomputer (20), removes to select the current signal delivery outlet of electric current Gear-shift switch (10) according to the recognition result of (20); Voltage, the current sampling signal of voltage sample retainer (13), current sample retainer (14) enter emitter follower (16), analog to digital converter (17) by change-over switch (15) timesharing, and the digital signal after (17) conversion is stored in RAM (22); Accept the metrical pulse of tested electric energy meter from pulse input unit (30), the energy value of calculating according to the electric energy metrical module is as calibration reference, thereby realized with soft standard electric energy meter being that the electric energy metrical module is the electrical energy meter calibration instrument of core.
2, the intelligent electric energy meter tester according to claim 1, it is characterized in that: voltage transformer (VT) (6) primary side has three voltage input ends, power pack (7) primary side has four input ends, and input end can insert three-phase voltage and biphase current respectively; According to RAM(22) in voltage, current sampling data, whether carry out the external cabling contact good, whether correct whether voltage phase sequence, electric current be separate correctly reaches the differentiation of the whole set of connections of electric current and voltage, has realized the intellectuality that wiring is corrected errors and differentiated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93201769 CN2147549Y (en) | 1993-02-06 | 1993-02-06 | Intelligent electric power meter correcting gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93201769 CN2147549Y (en) | 1993-02-06 | 1993-02-06 | Intelligent electric power meter correcting gauge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2147549Y true CN2147549Y (en) | 1993-11-24 |
Family
ID=33786152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93201769 Expired - Fee Related CN2147549Y (en) | 1993-02-06 | 1993-02-06 | Intelligent electric power meter correcting gauge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2147549Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101140320B (en) * | 2006-09-07 | 2010-05-26 | 深圳市科陆电子科技股份有限公司 | Electrical energy meter calibration stand and checking method thereof |
| CN101545941B (en) * | 2008-03-28 | 2011-09-28 | 深圳市科陆电子科技股份有限公司 | Method and system for detecting failure of electric energy station loop |
| CN101634695B (en) * | 2009-06-12 | 2012-07-25 | 深圳市科陆电子科技股份有限公司 | Method and device for calibrating power source |
| CN104569726A (en) * | 2015-01-16 | 2015-04-29 | 国家电网公司 | Intelligent sensor for detecting wiring state in electric energy meter verification |
| CN110471021A (en) * | 2018-05-10 | 2019-11-19 | 宁夏隆基宁光仪表股份有限公司 | A kind of electric energy meter calibrating apparatus and method with built-in monitoring base table |
-
1993
- 1993-02-06 CN CN 93201769 patent/CN2147549Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101140320B (en) * | 2006-09-07 | 2010-05-26 | 深圳市科陆电子科技股份有限公司 | Electrical energy meter calibration stand and checking method thereof |
| CN101545941B (en) * | 2008-03-28 | 2011-09-28 | 深圳市科陆电子科技股份有限公司 | Method and system for detecting failure of electric energy station loop |
| CN101634695B (en) * | 2009-06-12 | 2012-07-25 | 深圳市科陆电子科技股份有限公司 | Method and device for calibrating power source |
| CN104569726A (en) * | 2015-01-16 | 2015-04-29 | 国家电网公司 | Intelligent sensor for detecting wiring state in electric energy meter verification |
| CN110471021A (en) * | 2018-05-10 | 2019-11-19 | 宁夏隆基宁光仪表股份有限公司 | A kind of electric energy meter calibrating apparatus and method with built-in monitoring base table |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |