CN2824042Y - Intelligent single-phase electric energy meter capable of preventing fraudulent use of electricity - Google Patents
Intelligent single-phase electric energy meter capable of preventing fraudulent use of electricity Download PDFInfo
- Publication number
- CN2824042Y CN2824042Y CN 200520073308 CN200520073308U CN2824042Y CN 2824042 Y CN2824042 Y CN 2824042Y CN 200520073308 CN200520073308 CN 200520073308 CN 200520073308 U CN200520073308 U CN 200520073308U CN 2824042 Y CN2824042 Y CN 2824042Y
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Abstract
The utility model relates to an intelligent single-phase electric energy meter capable of preventing fraudulent use of electricity, which is composed of a current sampling loop 1, a current sampling loop 2, a metering circuit 3 and an alarm 4, wherein the current sampling return circuits 1 and 2 are separately connected with an input foot of the metering circuit 3 after connected with a fire wire and a zero line, and the alarm signal output foot of the metering circuit 3 is connected with the alarm. The utility model is characterized in that a single chip computer 5 is connected between the metering circuit 3 and the alarm 4, and a load control circuit 6 is connected between the single chip computer 5 and a load. Fraudulent use of electricity occurs when the current values of the two current sampling loops are differed by more than 12.5 percent, and the metering circuit 3 sends out signals to the single-chip microcomputer 5 which separately sends out the signals to the alarm 4 and the load control circuit 6 after processing the signals, and at this time, the alarm 4 can alarm and a driving chip 7 on the load circuit 6 can drive a magnetic latching type relay to cut off a power supply and can recover to supply electricity after the fraudulent use of electricity is corrected. The utility model can effectively prevent the occurrence of the fraudulent use of electricity and can enable people who fraudulently use electricity to be educated and to correct the fraudulent use of electricity.
Description
Affiliated technical field:
The utility model relates to a kind of anti-electricity-theft electric energy meter, particularly a kind ofly can cut off the electricity supply automatically when finding user's stealing, treat its correct after the intelligent single-phase anti-electricity-theft electric energy meter of automatic recovery of power supply again.
Technical background:
The computation chip of single-phase anti-electricity-theft electric energy meter commonly used is BL0951 and ADE7751 at present, their common ground is to have two current sampling circuits, sample respectively live wire and neutral line current, when neutral line current surpasses live wire electric current 12.5%, show electricity filching behavior or false wiring are arranged, produce alerting signal and make alarm equipment alarm, and according to big in two a sample rate currents current value metering.The weak point of this anti-electricity-theft electric energy meter is when stealing takes place, reports to the police though produce, but still power supply, can not give the stealing user outage punishment, it is turned over a new leaf.
Summary of the invention:
The purpose of this utility model is the weak point that overcomes at present used single-phase anti-electricity-theft electric energy meter, provides a kind of and cuts off the electricity supply automatically when stealing takes place, and treats that it corrects the intelligent single-phase anti-electricity-theft electric energy meter of back automatic recovery of power supply.
The purpose of this utility model is achieved through the following technical solutions.Intelligent single-phase anti-electricity-theft electric energy meter is by current sampling circuit 1 and current sampling circuit 2, metering circuit 3 and alarm 4 are formed, current sampling circuit 1 and current sampling circuit 2 are connected the back respectively and are connected with the input pin of metering circuit 3 with live wire and zero line, the alerting signal output pin of metering circuit 3 is connected with alarm 4, between the alerting signal output pin of metering circuit 3 and alarm 4, be connected with single-chip microcomputer 5, be connected with load control circuit 6 between single-chip microcomputer 5 and load, load control circuit is by chip for driving 7, magnetic Bao Teshi bistable relay J, isolation resistance and shunt capacitance are formed, the output pin of single-chip microcomputer 5 is through R11, R13 two isolation resistances are connected with the input pin of chip for driving 7 respectively, two isolation resistances all are connected to shunt capacitance, magnetic Bao Teshi bistable relay J is connected the live wire of its contact point and load with two output pins of chip for driving 7, zero line is connected.
The utility model is compared with at present used single-phase anti-electricity-theft electric energy meter, have when finding electricity filching behavior is arranged and give the alarm, promptly cut off the electricity supply after giving the alarm, allow the user correct electricity filching behavior, power supply more after a period of time after giving the alarm, if the current error of power supply back two current sampling circuits still surpasses 12.5% again, power supply again after stealing is corrected then continues to have a power failure, can safeguard the interests of national power supply department like this, also be a well education to electricity filching person.
Description of drawings:
Accompanying drawing 1 is a square frame electrical schematic diagram of the present utility model, and accompanying drawing 2 is an embodiment of the present utility model.
Embodiment:
Below in conjunction with description of drawings embodiment of the present utility model.In the accompanying drawing: 1-current sampling circuit 1; 2-current sampling circuit 2; The 3-metering circuit; The 4-alarm; The 5-single-chip microcomputer; The 6-load control circuit; The 7-chip for driving; The 8-reservoir; The 9-power supply;
Referring to Fig. 2, current sampling circuit 1 and current sampling circuit 2 are worked simultaneously, when the electric current in loop 2 greater than the electric current in loop 1 12.5% the time, signal of alerting signal output pin output on the metering circuit 3 is given single-chip microcomputer 5 (P87LPC764), send two signals after treatment, a signal is given load control circuit 6, and another signal is given alarm 4, and alarm 4 promptly gives the alarm after receiving signal.Chip for driving 7 (BL8023) in the load control circuit 6 receives signal and exports after signal Processing, goes to drive magnetic Bao Teshi bistable relay J work, promptly cuts off load circuit.Be connected in the reservoir 8 on the single-chip microcomputer 5 (P87LPC764), send out an information again to load control circuit 6 after setting in advance the half an hour (or one hour) after sending information for the first time, chip for driving 7 (BL8023) in the load control circuit 6 is received signal and is exported after signal Processing, (characteristics of magnetic Bao Teshi bistable relay are that first signal makes relay cut off circuit to go to drive magnetic Bao Teshi bistable relay J work, second signal can allow relay reset, promptly connect circuit) restore electricity, this moment, current sampling circuit 1 and current sampling circuit 2 continued sampling, if this moment, user's electricity filching behavior corrected, then the current error of two current sampling circuits is very little, even it is identical, then the utility model keeps normal power supply, metering, if user's electricity filching behavior does not correct, then the current error of two current sampling circuits is still greater than 12.5%, then repeat said process again, after the user corrects electricity filching behavior, recover normal power supply again, metering.
In force, single-chip microcomputer 5 is except that available P87LPC764, also can use single-chip microcomputers such as P87LPC917, P87LPC922, P87LPC923, MC68HC908QY4, MC68HC908QY2, MC68HC908QT2, MC68HC908QT4, chip for driving 7 in the load control circuit 6 except that available BL8023, also available BL58054, chip for driving such as BL5608, BH3024.
Claims (2)
1, a kind of intelligent single-phase anti-electricity-theft electric energy meter, form by current sampling circuit (1), current sampling circuit (2), metering circuit (3) and alarm (4), current sampling circuit (1) and current sampling circuit (2) are connected the back respectively and are connected with the input pin of metering circuit (3) with live wire and zero line, the alerting signal output pin of metering circuit (3) is connected with alarm (4), it is characterized in that between the alerting signal output pin of metering circuit (3) and alarm (4), being connected with single-chip microcomputer (5), be connected with load control circuit (6) between single-chip microcomputer (5) and load.
2, by the described intelligent single-phase anti-electricity-theft electric energy meter of claim 1, it is characterized in that load control circuit is made up of chip for driving (7), magnetic Bao Teshi bistable relay J, isolation resistance and shunt capacitance, the output pin of single-chip microcomputer (5) is connected with the input pin of chip for driving (7) respectively through R11, R13 two isolation resistances, two isolation resistances all are connected to shunt capacitance, magnetic Bao Teshi bistable relay J is connected with the output pin of chip for driving (7), and its contact point is connected with live wire, the zero line of load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520073308 CN2824042Y (en) | 2005-07-05 | 2005-07-05 | Intelligent single-phase electric energy meter capable of preventing fraudulent use of electricity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520073308 CN2824042Y (en) | 2005-07-05 | 2005-07-05 | Intelligent single-phase electric energy meter capable of preventing fraudulent use of electricity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2824042Y true CN2824042Y (en) | 2006-10-04 |
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ID=37033157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520073308 Expired - Lifetime CN2824042Y (en) | 2005-07-05 | 2005-07-05 | Intelligent single-phase electric energy meter capable of preventing fraudulent use of electricity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2824042Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104330603A (en) * | 2014-11-13 | 2015-02-04 | 国网河南省电力公司南阳供电公司 | Electricity stealing preventing type electric energy meter |
| CN104515903A (en) * | 2014-06-10 | 2015-04-15 | 合肥艾通自动化工程有限公司 | Method for designing electric energy metering device with unsafe load identification function |
| CN108072777A (en) * | 2016-11-15 | 2018-05-25 | 刘伟华 | anti-electricity-theft device |
| CN108680784A (en) * | 2018-05-17 | 2018-10-19 | 深圳市共进电子股份有限公司 | Zero cross detection circuit |
-
2005
- 2005-07-05 CN CN 200520073308 patent/CN2824042Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104515903A (en) * | 2014-06-10 | 2015-04-15 | 合肥艾通自动化工程有限公司 | Method for designing electric energy metering device with unsafe load identification function |
| CN104330603A (en) * | 2014-11-13 | 2015-02-04 | 国网河南省电力公司南阳供电公司 | Electricity stealing preventing type electric energy meter |
| CN108072777A (en) * | 2016-11-15 | 2018-05-25 | 刘伟华 | anti-electricity-theft device |
| CN108680784A (en) * | 2018-05-17 | 2018-10-19 | 深圳市共进电子股份有限公司 | Zero cross detection circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150705 Granted publication date: 20061004 |
|
| EXPY | Termination of patent right or utility model |