CN1114051A - Method for anti-fraudulent use electricity by short-circuit - Google Patents
Method for anti-fraudulent use electricity by short-circuit Download PDFInfo
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- CN1114051A CN1114051A CN 94107083 CN94107083A CN1114051A CN 1114051 A CN1114051 A CN 1114051A CN 94107083 CN94107083 CN 94107083 CN 94107083 A CN94107083 A CN 94107083A CN 1114051 A CN1114051 A CN 1114051A
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Abstract
The invented method introduces a wave trap and carrier wave transmitting, receiving and alarming circuits in the kilowatt-hour meter, when fraudulent use of electricity by short circuit takes place, the carrier transmitting circuit sends out the carrier signal via the short circuit to the carrier receiving circuit, after the signal is treated by signal treatment circuit, it drives the alarming circuit to alarm or record. Said method features simple and easy to implement, unnecessary to change the outside connections of the watt-hour meter and capable of alarming accurately.
Description
The present invention relates to the anti-shorting stub stealing electricity method in the supply line.
Illegal electricity consumption (stealing) is a universal phenomenon of society, because the electricity filching person means are various, form is all, power supply management department deeply worries about to this, except strengthening the management of power use, fail to find a kind of effective method to be prevented, it not only causes enormous economic loss to power department, has also brought serious threat to Electrical Safety always.Therefore effectively the invention of watt-hour meter anti-theft electricity technology has very great economic benefit and social benefit.
Although social at present upward stealing form and gimmick are various, what harm was maximum is fraudulent use electricity by short-circuit.Be with the electric current inlet wire and the outlet short circuit of electric energy meter, the part electric current directly flow through from short-term, thereby reach the stealing purpose.The Yi Hanger that is easy to implement leaves no trace, and power supply department is hard to guard against.Existing prevention method mainly contains two kinds:
1. the anti-fraudulent use electricity by short-circuit technology of current balance type principle
Promptly before the inlet wire by electric energy meter the difference of the output current of the input current of (must before short circuit) and outlet comes electricity filching behavior is detected.When input, the output current balance is when (equating), no stealing generation.And when uneven, then having fraudulent use electricity by short-circuit to take place, this is because the part of input current is caused output current less than input current by the shorting stub bypass.Utilize the electricity theft prevention device of this technical method must make each watt-hour meter that four inputs and output line are arranged, a waterline, a line in addition, two current balance type lines.So just caused great limitation to its application.Except the inconvenience that connects up, the installation of long-range current sensor (input current measurement) is also very difficult.And run into destruction easily.Can't apply.
2. phase current balance anti-fraudulent use electricity by short-circuit technology
When the fraudulent use electricity by short-circuit behavior took place, promptly the turnover line of electric energy meter live wire was caused the part electric current by bypass by short circuit, made live wire and the electric current (phase current) on other line unequal (promptly uneven) in the electric energy meter.Behind switch, the line of electric force situation, thus detect this electricity filching behavior, reach anti-electricity-theft purpose, this method is more superior than preceding a kind of method, need not change existing wiring, more simple and easy to do.But when leaky appears in household electrical appliances, also can cause the phase current imbalance, false alarm occur.And during tame electrical short, because the circuital current sudden change also may cause wrong report; And work as live wire, with other line cross-over connection (during short circuit) simultaneously, also can make it lose effect.
The object of the present invention is to provide a kind of electricity anti-theft method of the shorting stub electricity filching behavior being made accurate warning and record.
Method for anti-fraudulent use electricity by short-circuit of the present invention, be with reactance (capacitive reactance, induction reactance, impedance is introduced in the watt-hour meter with the ripple frequency characteristic by electric current, promptly in the alternating current of 50/60HZ pull-in frequency greater than the carrier frequency of tens KHZ, by the carrier frequency reactance change that (shorting stub) causes to cross-line, detect electricity filching behavior.
The method of anti-shorting stub stealing of the present invention, it is characterized in that introducing in the watt-hour meter trap and carrier wave transmission, reception and warning circuit, described trap is to be serially connected with watt-hour meter, the low-pass filter circuit of permission low frequency ac by stoping high-frequency carrier signal to pass through of being made up of electric capacity, inductance, resistance; Described carrier transmitting-receiving send circuit to comprise a high frequency carrier generator and an amplifier that is used to improve carrier output power, and one carried out frequency-selecting with carrier signal, after the passivation, the band that lotus root is closed the line of electric force inlet wire that sends to watt-hour meter or outlet (connecing coupling capacitor between phase line and the center line) is logical, lotus root is closed wave filter; Described carrier wave receives and warning circuit comprises that a carrier signal with watt-hour meter line of electric force inlet wire or outlet (connecing coupling capacitor between phase line and the center line) output is isolated with the lotus root of frequency-selecting and closes wave filter, and one will be closed signal processing circuit that the carrier signal of wave filter output handles and one accordingly by the warning circuit that carries out the electricity filching behavior judgement through the carrier signal of signal Processing by lotus root.
The present invention is described in detail below in conjunction with accompanying drawing:
Fig. 1 is a circuit block diagram of the present invention.
As shown in Figure 1, when fraudulent use electricity by short-circuit does not take place in the line of electric force inlet wire of watt-hour meter and outlet, carrier signal is blocked by the trap of current coil in the watt-hour meter and introducing, and the carrier wave receiving processing circuit does not receive carrier signal or has only the very little signal of amplitude, is not enough to drive warning circuit; And when watt-hour meter into and out of between line during by short circuit, in when, promptly fraudulent use electricity by short-circuit taking place, the carrier signal that the carrier wave transtation mission circuit sends out can directly be sent in the carrier wave receiving circuit through shorting stub or via the coupling capacitor between phase line, center line, shorting stub, after signal Processing, drive warning circuit and report to the police or record.
Carrier generator involved in the present invention, amplifier, lotus root are closed wave filter, carrier signal treatment circuit, warning treatment circuit all belong to prior art, requirement according to anti-fraudulent use electricity by short-circuit of the present invention, the generation frequency that carrier generator of the present invention selects for use IC, R, C to form is about the circuit and square-wave of 200KHZ square wave, the logical amplifying filter circuit of the active band that amplifier then selects for use R, C, operational amplifier to constitute, its centre frequency is approximately at 200KHZ, be used for the square wave passivation of 200KHZ is become the sine wave of same frequency, so that send smoothly; Lotus root is closed wave filter can be by I.F.T., the isolation capacitance of amplitude modulation radio reception, and resonant capacitance is formed, and is used to isolate forceful electric power, and the alternating current of blocking-up 220V/50HZ only allows the carrier wave sine wave of 200KHZ to pass through.Choke circuit of the present invention can be by the coil in the watt-hour meter, and interpole coil L and capacitor C are formed, and the carrier wave that is used to block 200KHZ passes through by allowing the 220V/50HZ alternating current.
The carrier signal that carrier signal treatment circuit of the present invention is used for receiving is amplified and is rectified into corresponding DC level, can be by operational amplifier.
Warning treatment circuit of the present invention, usually by comparer, variable resistor triode, hummer constitute, when from the DC level of the carrier wave of carrier signal treatment circuit greater than by the obtained suitable alarming threshold value of variable resistor the time, drive to report to the police, make hummer send that sound is reported to the police or record simultaneously.
Fig. 2 is a kind of anti-electricity-theft embodiment of the present invention.
As shown in the figure, producing the vibration square wave of 200KHZ by carrier generator, is the sine wave of 200KHZ through the amplification filtering post-passivation, after lotus root is closed wave filter and is further purified, delivers on the line of electric force.Do not taking place under the stealing situation, carrier wave is blocked at trap, and the signal that receiving end receives is very little, and after rectification, relatively more alert threshold value is little, is not enough to drive and reports to the police.
When fraudulent use electricity by short-circuit took place, carrier signal was sent to receiving end through shorting stub, after lotus root is closed the wave filter frequency-selecting, be rectified into higher DC level, be higher than alarm threshold value, comparer LM311 exports high level, and it is extremely alert that driving hummer BZ1 sends stealing, and alerting signal output is provided.
Anti-shorting stub stealing electricity method of the present invention is simple, need not change the outer wiring of watt-hour meter, in various abominable situations, as the household electrical appliances electric leakage, under the situations such as short circuit, still can report to the police like clockwork, this technology is applied to induction type electric energy meter with non-return function, in electronic watch and the pre payment watthour meter, can solve the electrical energy meter anti-theft electricity problem more satisfactoryly, have higher popularization and application values.
Claims (1)
1, a kind of method of anti-shorting stub stealing, it is characterized in that in watt-hour meter, introducing a trap and carrier wave transmission, reception and warning circuit, described trap is to be serially connected with watt-hour meter, the low-pass filter circuit that the prevention high frequency carrier of being made up of inductance, electric capacity, resistance flows through by the permission low frequency ac; Described carrier wave transtation mission circuit comprises a high frequency carrier generator and an amplifier that is used to improve carrier output power, and one carrier signal carried out the frequency-selecting passivation after, lotus root is closed the logical lotus root of band of the line of electric force inlet wire that sends to watt-hour meter or outlet (between phase line and the center line and connect coupling capacitor) and closes wave filter; Described carrier wave receives, warning circuit, comprises will isolating from the carrier signal of the outlet of watt-hour meter line of electric force or inlet wire (between phase line and the center line and connect coupling capacitor) output for one closing wave filter and one with the lotus root of frequency-selecting and will closing signal processing circuit that the carrier signal of wave filter output handles and one by lotus root and carry out the warning circuit that electricity filching behavior is differentiated by the carrier signal of handling through signal processing circuit accordingly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94107083 CN1114051A (en) | 1994-06-09 | 1994-06-09 | Method for anti-fraudulent use electricity by short-circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94107083 CN1114051A (en) | 1994-06-09 | 1994-06-09 | Method for anti-fraudulent use electricity by short-circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1114051A true CN1114051A (en) | 1995-12-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94107083 Pending CN1114051A (en) | 1994-06-09 | 1994-06-09 | Method for anti-fraudulent use electricity by short-circuit |
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| CN (1) | CN1114051A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101620240B (en) * | 2009-03-10 | 2013-03-27 | 吴嘉懿 | Anti-electricity-theft electric energy meter |
| CN105353274A (en) * | 2015-11-25 | 2016-02-24 | 国网辽宁省电力有限公司阜新供电公司 | Electricity larceny prevention method |
| CN106771447A (en) * | 2016-11-28 | 2017-05-31 | 国家电网公司 | A kind of electric energy metrical is opposed electricity-stealing monitoring device and method |
| CN107120527A (en) * | 2017-07-07 | 2017-09-01 | 山东特联信息科技有限公司 | Anti- short-circuit device, gas cylinder maintenance device and filling machine |
| CN110133435A (en) * | 2019-04-26 | 2019-08-16 | 广州京善电子有限公司 | The electricity anti-theft method and device of DC grid system |
-
1994
- 1994-06-09 CN CN 94107083 patent/CN1114051A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101620240B (en) * | 2009-03-10 | 2013-03-27 | 吴嘉懿 | Anti-electricity-theft electric energy meter |
| CN105353274A (en) * | 2015-11-25 | 2016-02-24 | 国网辽宁省电力有限公司阜新供电公司 | Electricity larceny prevention method |
| CN106771447A (en) * | 2016-11-28 | 2017-05-31 | 国家电网公司 | A kind of electric energy metrical is opposed electricity-stealing monitoring device and method |
| CN107120527A (en) * | 2017-07-07 | 2017-09-01 | 山东特联信息科技有限公司 | Anti- short-circuit device, gas cylinder maintenance device and filling machine |
| CN107120527B (en) * | 2017-07-07 | 2023-02-21 | 山东特联信息科技有限公司 | Prevent short circuit device, gas cylinder supervision device and add mechanism of qi |
| CN110133435A (en) * | 2019-04-26 | 2019-08-16 | 广州京善电子有限公司 | The electricity anti-theft method and device of DC grid system |
| CN110133435B (en) * | 2019-04-26 | 2021-04-13 | 广州京善电子有限公司 | Electricity larceny prevention method and device for direct current network system |
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| WD01 | Invention patent application deemed withdrawn after publication |