CN203745536U - Total-voltage-loss detection system of three-phase electronic type multifunctional meter - Google Patents
Total-voltage-loss detection system of three-phase electronic type multifunctional meter Download PDFInfo
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- CN203745536U CN203745536U CN201420087243.9U CN201420087243U CN203745536U CN 203745536 U CN203745536 U CN 203745536U CN 201420087243 U CN201420087243 U CN 201420087243U CN 203745536 U CN203745536 U CN 203745536U
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Abstract
The utility model provides a total-voltage-loss detection system of a three-phase electronic type multifunctional meter. The total-voltage-loss detection system comprises a control unit, a meter reading battery circuit, a total-voltage-loss detecting circuit and a signal comparative reference voltage source voltage-stabilizing circuit, wherein the control unit judges and records the total-voltage-loss situations, the meter reading battery circuit provides power supply for the system, the total-voltage-loss detecting circuit outputs an acquired and processed voltage signal to the control unit, and the signal comparative reference voltage source voltage-stabilizing circuit provides a stable voltage for the total-voltage-loss detecting circuit. By adding the signal comparative reference voltage source voltage-stabilizing circuit, the power supply of a signal comparative reference voltage circuit is stable, that is the voltage of the meter reading battery circuit is reduced, the power supply of the signal comparative reference voltage circuit is not changed, a reference voltage output by the signal comparative reference voltage circuit is not changed, the problems of inaccurate total-voltage-loss detection and mis-alarm are solved, the electric quantity supplementation can be performed normally when the total-voltage-loss situation occurs, the accuracy of total-voltage-loss detection is ensured, and the economic benefit of electric power enterprises is guaranteed.
Description
Technical field
The utility model relates to a kind of full decompression detection system of three phase electronic multifunctional table.
Background technology
In three-phase power supply system often can there is decompression phenomenon in electric power meter; decompression situation is varied; according to statistics in measuring apparatus fault; the metering fault being caused by decompression accounts for the more than 50% of whole number of stoppagess; in most cases wherein due to fuse melting, wiring error or user's stealing; can cause metering ammeter to measure less, bring economic loss to electric company.
And the full decompression detection implementation of existing three phase electronic multifunctional table mainly contains two kinds: a kind of is that the full decompression measuring ability that adopts computation chip to carry is monitored, this kind of mode power consumption is bigger than normal, makes to provide the service time of battery of checking meter of full decompression testing too short; Another employing be full decompression testing circuit add computation chip coordinate mode, this mode power consumption is lower, but along with the passing of working time, cell voltage constantly reduces, the supply voltage of whole full decompression testing circuit also can reduce, the reference voltage of signal benchmark potential circuit output also can change, full decompression is detected inaccurate, there is the situation of wrong report, cause confession, the unnecessary dispute of electricity consumption both sides, cause the loss electric weight of Utilities Electric Co. normally not remedy, Utilities Electric Co. suffers economic loss.
Utility model content
In view of this, the technical problems to be solved in the utility model be to provide a kind of stable, accurately, the full decompression detection system of three phase electronic multifunctional table timely.
For solving the problems of the technologies described above, the technical scheme that the utility model provides is: a kind of full decompression detection system of three phase electronic multifunctional table, comprise and judge and record the control module of full decompression situation and provide the battery circuit of checking meter of power supply for system, full decompression testing circuit and signal benchmark voltage source mu balanced circuit are also comprised, the voltage signal after institute's acquisition process is exported to control module by described full decompression testing circuit, and described signal benchmark voltage source mu balanced circuit provides stable voltage for full decompression testing circuit.
Described full decompression testing circuit comprises current sampling circuit, signal amplification circuit, signal comparator circuit, signal benchmark potential circuit, described current sampling circuit gathers load current signal and transfers to signal amplification circuit, signal amplification circuit amplifies the load current signal collecting and transfers to signal comparator circuit, load current signal after amplifying and the reference voltage signal that provides of signal benchmark potential circuit are provided described signal comparator circuit, and make the judgement whether load current is greater than 5% rated current.
Described signal benchmark voltage source mu balanced circuit adopts low-power consumption three terminal regulator ZSJ1, and the voltage from the battery circuit of checking meter is carried out to voltage stabilizing, and provides stabilized supply voltage for signal benchmark potential circuit.
Described control module comprises cpu circuit, power supply power-fail testing circuit, metering power control circuit, computation chip circuit, described cpu circuit receives the power-off signal that detects described power supply power-fail testing circuit in the time that the load current of signal comparator circuit is greater than the useful signal of 5% rated current, and described metering power control circuit and computation chip circuit are subject to load current to be greater than the useful signal power-off signal control of 5% rated current.
Described current sampling circuit adopts three phase sampler mutual inductors and resistance R J1, RJ2, RJ3 that current signal is converted to effectively weak analog voltage signal, described signal amplification circuit adopts operational amplifier USJ1 that the weak analog voltage signal from current sampling circuit is enlarged into analog voltage signal, and described signal comparator adopts isolation capacitance CSJ1 and resistance R SJ13 after small isolation decay, to send voltage comparator USJ2A by the analog voltage signal from signal amplification circuit.
Compared with prior art, the utlity model has following advantage:
The utility model provides a kind of full decompression detection system of three phase electronic multifunctional table, at signal benchmark potential circuit power unit, increase signal benchmark voltage source mu balanced circuit, make the power supply of signal benchmark potential circuit stable, the battery circuit lower voltage even if check meter, the power supply of signal benchmark potential circuit also can not change, the reference voltage of signal benchmark potential circuit output does not also change, solving full decompression detects inaccurate, there is the problem of wrong report, electric quantity compensating after full decompression situation occurs can normally be carried out, ensure that full decompression detects accurately, ensure electric power enterprise economic interests.
Brief description of the drawings
Fig. 1 is the full decompression detection system structural representation of the utility model embodiment three phase electronic multifunctional table.
Fig. 2 is the utility model embodiment current sampling circuit and signal amplification circuit structural drawing.
Fig. 3 is the utility model embodiment signal comparator circuit, signal benchmark potential circuit and signal benchmark voltage source voltage regulator circuit structure figure.
Fig. 4 is that the utility model embodiment measures power control circuit structural drawing.
Fig. 5 is the utility model embodiment battery circuit structural drawing of checking meter.
Fig. 6 is the utility model embodiment voltage power-fail detection circuit structural drawing.
Fig. 7 is the utility model Embodiment C PU circuit structure diagram.
Fig. 8 is the utility model embodiment computation chip circuit structure diagram.
Embodiment
For the ease of it will be appreciated by those skilled in the art that below in conjunction with accompanying drawing and embodiment, the utility model is explained in further detail.
embodiment 1
As shown in Figure 1, 2, a full decompression detection system for three phase electronic multifunctional table, comprises current sampling circuit 22, signal amplification circuit 23, signal comparator circuit 24, cpu circuit 25, the battery circuit 26 of checking meter, power supply power-fail testing circuit 27, metering power control circuit 28, computation chip circuit 29, signal benchmark potential circuit 21, signal benchmark voltage source mu balanced circuit 20.After being connected with signal amplification circuit 23, described current sampling circuit 22 is connected with signal comparator circuit 24 one end, the other end of signal comparator circuit 24 is connected with cpu circuit 25, described power supply power-fail testing circuit 27 is connected with cpu circuit 25 one end, cpu circuit 25 other ends connect one end of metering power control circuit 28, and the other end of metering power control circuit 28 connects computation chip circuit 29; The described battery circuit 26 of checking meter is connected with signal benchmark voltage source mu balanced circuit 20, signal amplification circuit 23, signal comparator circuit 24, cpu circuit 25 and metering power control circuit 28 respectively; One end of described signal benchmark voltage source mu balanced circuit 20 is connected with signal benchmark potential circuit 21 one end, and the other end of signal benchmark potential circuit 21 is connected in signal comparator circuit 24.
Described current sampling circuit 22 comprises resistance R J1, RJ2, RJ3, A phase sampler mutual inductor CTA, B phase sampler mutual inductor CTB, C phase sampler mutual inductor CTC, signal amplification circuit 23 is by resistance R SJ1 ~ RS9, operational amplifier USJ1 composition, described A phase sampler mutual inductor CTA, B phase sampler mutual inductor CTB, C phase sampler mutual inductor CTC is respectively at resistance R J1, RJ2, after RJ3 parallel connection respectively with resistance R SJ5, RSJ6, RSJ7 connects, after described RSJ5 series connection RSJ1, be connected in the input anode of operational amplifier USJ1, described RSJ2 one end is connected with the other end of RSJ6, the other end is connected in the input anode of operational amplifier USJ1, one end of described RSJ3 is connected with the other end of RSJ6, the other end is connected in the input cathode of operational amplifier USJ1, one end of described RSJ4 is connected with the other end of RSJ7, the other end is connected in the input cathode of operational amplifier USJ1, and described operational amplifier USJ1 output terminal feeds back to input cathode by resistance R SJ8 and the resistance R SJ9 of series connection, signal comparator circuit 24 is by capacitor C SJ1, resistance R SJ13, RSJ14 and comparer USJ2A composition, signal benchmark potential circuit 2A is by resistance R SJ10, RSJ11, RSJ12 composition, signal benchmark voltage source mu balanced circuit 2B is made up of low-power consumption three terminal regulator ZSJ1, cpu circuit 25 is mainly made up of single-chip microcomputer UC1, check meter battery circuit 26 mainly by the battery BT6V that checks meter, isolating diode DD1 ~ DD2 composition, power supply power-fail testing circuit 27 is by resistance R C11 ~ RC12, voltage stabilizing diode ZC1 composition, metering power control circuit 28 is by isolating diode DD3, three terminal regulator UJ2, metal-oxide-semiconductor QJ1, triode QJ2 and resistance R J4 ~ RJ6 composition, computation chip circuit 29 is mainly made up of computation chip UJ1, described comparer model is TLV3491, ground connection after comparer USJ2A input anode resistance in series RSJ11 and RSJ12, after contact resistance RSJ10, connect low-power consumption three terminal regulator ZSJ1 simultaneously, described low-power consumption three terminal regulator ZSJ1 one end connects the battery circuit 26 of checking meter, other end ground connection, ground connection after the input cathode resistance in series RSJ13 of described comparer USJ2A, be connected with the output terminal of operational amplifier USJ1 by capacitor C SJ1 simultaneously, after the output terminal resistance in series RSJ14 of comparer USJ2A, connect the ALL-V-LOSS pin with single-chip microcomputer UC1, comparer USJ2A is powered by the battery circuit 26 of checking meter.
After full decompression condition forms, A, B, the current signal of C three-phase (or three-phase combination in any) is through resistance R J1, RJ2, RJ3 and sampling mutual inductor CTA, CTB, CTC sampling, sampling after-current signal is converted to effectively weak analog voltage signal, effectively weak analog voltage signal is through resistance R SJ1～RS9, operational amplifier USJ1 is enlarged into analog voltage signal, then after isolation capacitance CSJ1 and the small isolation decay of resistance R SJ13, deliver to the A-input pin of voltage comparator USJ2A, as long as this analog voltage signal voltage is greater than reference voltage A+ pin voltage, voltage comparator output pin AOUT output low level, otherwise output high level, the weak analog voltage signal sampling is converted to digital signal level, after resistance R SJ14 isolation, be input to the corresponding pin of single-chip microcomputer UC1, single-chip microcomputer UC1 internal processes does corresponding software function action, complete the detection of dynamic of full decompression measuring ability, resistance R SJ10～RSJ12 electric resistance partial pressure, provides the benchmark voltage of voltage comparator USJ2A, after the supply voltage VSJ voltage stabilizing that low-power consumption three terminal regulator ZSJ1 provides the battery of checking meter, provide burning voltage to signal benchmark potential circuit, ensure the accuracy of full decompression measuring ability, consider that maximum possible makes whole circuit effective in battery useful life, what the present embodiment adopted is 1.8V low-power consumption three terminal regulator.
Be more than wherein specific implementation of the present utility model, it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these apparent replacement forms all belong to protection domain of the present utility model.
Claims (5)
1. the full decompression detection system of a three phase electronic multifunctional table, comprise the control module (1) that judges and record full decompression situation and provide the battery circuit of checking meter (26) of power supply for system, it is characterized in that: also comprised full decompression testing circuit (2) and signal benchmark voltage source mu balanced circuit (20), the voltage signal after institute's acquisition process is exported to control module (1) by described full decompression testing circuit (2), and described signal benchmark voltage source mu balanced circuit (20) provides stable voltage for full decompression testing circuit (2).
2. the full decompression detection system of three phase electronic multifunctional table according to claim 1, it is characterized in that: described full decompression testing circuit (2) comprises current sampling circuit (22), signal amplification circuit (23), signal comparator circuit (24), signal benchmark potential circuit (21), described current sampling circuit (22) gathers load current signal and transfers to signal amplification circuit (23), signal amplification circuit (23) amplifies the load current signal collecting and transfers to signal comparator circuit (24), load current signal after amplifying and the reference voltage signal that provides of signal benchmark potential circuit (21) are provided described signal comparator circuit (24), and make the judgement whether load current is greater than 5% rated current.
3. the full decompression detection system of three phase electronic multifunctional table according to claim 2, it is characterized in that: described signal benchmark voltage source mu balanced circuit (20) adopts low-power consumption three terminal regulator ZSJ1, to carry out voltage stabilizing from the voltage of the battery circuit of checking meter (26), and provide stabilized supply voltage for signal benchmark potential circuit (21).
4. the full decompression detection system of three phase electronic multifunctional table according to claim 1, it is characterized in that: described control module (1) comprises cpu circuit (25), power supply power-fail testing circuit (27), metering power control circuit (28), computation chip circuit (29), described cpu circuit (25) receives the power-off signal that detects described power supply power-fail testing circuit (27) in the time that the load current of signal comparator circuit (24) is greater than the useful signal of 5% rated current, described metering power control circuit (28) and computation chip circuit (29) are subject to load current to be greater than the useful signal power-off signal control of 5% rated current.
5. the full decompression detection system of three phase electronic multifunctional table according to claim 2, it is characterized in that: described current sampling circuit (22) adopts three phase sampler mutual inductor (CTA, CTB, and resistance R J1 CTC), RJ2, current signal is converted to effectively weak analog voltage signal by RJ3, described signal amplification circuit (23) adopts operational amplifier USJ1 to be enlarged into analog voltage signal from the weak analog voltage signal of current sampling circuit (22), described signal comparator circuit (24) adopts isolation capacitance CSJ1 and resistance R SJ13 after small isolation decay, to send voltage comparator USJ2A by the analog voltage signal from signal amplification circuit (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420087243.9U CN203745536U (en) | 2014-02-28 | 2014-02-28 | Total-voltage-loss detection system of three-phase electronic type multifunctional meter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420087243.9U CN203745536U (en) | 2014-02-28 | 2014-02-28 | Total-voltage-loss detection system of three-phase electronic type multifunctional meter |
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| CN203745536U true CN203745536U (en) | 2014-07-30 |
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|---|---|---|---|
| CN201420087243.9U Expired - Fee Related CN203745536U (en) | 2014-02-28 | 2014-02-28 | Total-voltage-loss detection system of three-phase electronic type multifunctional meter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106093561A (en) * | 2016-06-22 | 2016-11-09 | 华立科技股份有限公司 | The power consumption control method of ammeter power down full decompression logout |
| CN106093560A (en) * | 2016-06-22 | 2016-11-09 | 华立科技股份有限公司 | The full decompression detection control method of extremely low power dissipation under ammeter power-down state |
| CN112639497A (en) * | 2019-11-29 | 2021-04-09 | 深圳市大疆创新科技有限公司 | Battery detection circuit, battery detection method, battery, electronic device and storage medium |
-
2014
- 2014-02-28 CN CN201420087243.9U patent/CN203745536U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106093561A (en) * | 2016-06-22 | 2016-11-09 | 华立科技股份有限公司 | The power consumption control method of ammeter power down full decompression logout |
| CN106093560A (en) * | 2016-06-22 | 2016-11-09 | 华立科技股份有限公司 | The full decompression detection control method of extremely low power dissipation under ammeter power-down state |
| CN106093560B (en) * | 2016-06-22 | 2018-07-20 | 华立科技股份有限公司 | The full decompression of extremely low power dissipation detects control method under ammeter power-down state |
| CN106093561B (en) * | 2016-06-22 | 2018-07-20 | 华立科技股份有限公司 | The power consumption control method of the full decompression logout of ammeter power down |
| CN112639497A (en) * | 2019-11-29 | 2021-04-09 | 深圳市大疆创新科技有限公司 | Battery detection circuit, battery detection method, battery, electronic device and storage medium |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140730 |
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| CF01 | Termination of patent right due to non-payment of annual fee |