CN1940577A - Device against charge evasion - Google Patents
Device against charge evasion Download PDFInfo
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- CN1940577A CN1940577A CN 200510021734 CN200510021734A CN1940577A CN 1940577 A CN1940577 A CN 1940577A CN 200510021734 CN200510021734 CN 200510021734 CN 200510021734 A CN200510021734 A CN 200510021734A CN 1940577 A CN1940577 A CN 1940577A
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Abstract
An electricity-stealing proof device consists of current sampling circuit, electric energy metering circuit, special chip and display circuit. It is featured as detecting current of user line and converting detected valve to be electric energy value, comparing said electric energy value with value metered by user electric energy meter for judging whether user is on electricity-stealing or not.
Description
1. technical field
This device against charge evasion belongs to the technical field of power electronics instrument.
2. background technology
The enforcement patent No. is that ZL02221770.3, publication number are the technology of 02113419.7 device against charge evasion, really can all-out confrontation stealing trick miscellaneous.But because the electricity consumption end detecting device of this technology stationary installation need be obtained metrical pulse from user's electric energy meter, and gives the feeder ear detecting device with the spread of the rumours mode after the encoded modulation, this part circuit is installed in the electric energy meter usually or shows in the meter cabinet.For new product or newly install the family and be out of question, but for a large amount of electric energy meters or table meter cabinet of current on-line operation, reequiping several nothings at the scene may.Though and the electricity consumption end detecting device of wheeled apparatus needn't be obtained metrical pulse from user's electric energy meter, it is the same with stationary installation, does not have electric power meter, can't judge power-steeling quantity immediately at the stealing scene.At the problems referred to above, presents has proposed improvement project.
3. summary of the invention
This device follows the variable of user's electric energy meter or relevant measuring apparatus to make comparisons with this energy value by detecting the subscriber's line electric current and this detected value being scaled energy value again, judges user whether stealing and power-steeling quantity thereof according to this.Implement present technique, can be electric industry department and provide a kind of simple in structure, easy to use, both had the function of comprehensively opposing electricity-stealing, and installed or needn't change online electric energy meter again during running, and can detect the on-the-spot whether device against charge evasion of stealing and power-steeling quantity thereof of user of judging immediately.
4. description of drawings
Fig. 1 is basic scheme and and the signal of operational relations such as user's electric energy meter, customer charge thereof of this device FQ.FQ contains circuit such as current sample, electric energy metrical and electric weight demonstration.Wherein current sampling circuit can adopt current transformer or little value resistor, and after to the sampling of user's current i, V delivers to ic for energy metering sampled voltage.Ic for energy metering can adopt the universal circuit of V/F conversion or the special chip of electronic electric energy meter, and the V value is scaled electric energy metrical pulse FJ, delivers to the electric weight display circuit.The electric weight display circuit can adopt type drum, LED or LCD register, shows the power consumption of this subscriber's line during detected.This power consumption and user's electric energy meter or the relevant measuring apparatus variable during same is made comparisons, i.e. whether stealing and power-steeling quantity thereof of this user of decidable.
5. embodiment
5.1 one of embodiment
That utilization ZL02221770.3 patent document is described, after current sample and line rectification, obtain the scheme of electric energy metrical pulse FJ (in this patent document, being FG and FY) through the V/F conversion, then FJ is sent into electric weight display circuit shown in Figure 2, can finish detection power consumption.
IC is a d type flip flop among Fig. 2, and M is the bidirectional pulse motor that drives type drum, and C is that pulsewidth is set capacitor.The D of IC is connected to the Q end, and FJ adds to the CP end, is connected to Q and Q end after M and the C series connection.After FJ sends into, cause the alternate of Q and Q end level height, export the certain bidirectional pulse of width by C, drive M to drive the type drum metering.Adjust the parameter of V/F translation circuit, the metering constant of FJ and type drum is equated, the FJ sequence of then sending into, just accumulative total is corresponding energy value.
As seen, used V/F translation circuit in the ZL02221770.3 patented technology, can be used as a kind of general scheme of ic for energy metering, and its linear rectification circuit only plays the effect that alternating voltage is converted to DC voltage, still belongs to the scope of current sampling circuit in essence.In view of the above, the FQ among Fig. 1 can state Fig. 3 as.To Fig. 3 and Fig. 6 hereinafter, current sampling circuit is understood by the function that contains line rectification.
Except adopting this mechanical register of type drum, also can deliver to FJ have counting, the circuit of functions such as storage, decoding, driving, with electronics registers such as driving LED or LCD.The mechanism of foregoing circuit is known.
5.2 two of embodiment
H is a current transformer among Fig. 4.IC
1Be the special chip of electronic electric energy meter, can select AD7751 etc. for use.IC
2Be voltage comparator, can select LM311 etc. for use.The topology example of attenuating network is in Fig. 5: work as J
1～J
3One of when connecting, relevant R
5～R
7One of with regard to short circuit.And K
1～K
3One of when connecting, relevant R
8～R
10One of just and place in circuit.Set the resistance and the number thereof of resistor rightly, and the combination of utilization J and K, just can obtain required pad value.C
1～C
6It is filter capacitor.IC
2And accessory circuit is formed the permanent width of cloth voltage source of 50HZ.R wherein
1And D
1, D
2Form clamping circuit, IC
2The voltage magnitude of in-phase input end is clamped down at D
1, D
2Threshold value within.R
2And R
3Form divider, get R
2On forward voltage V
3Add to IC
2Inverting input.V
3Height determine the initial variable of this device, IC in the time of generally can reaching the 0.1A left and right sides by i
2Just can normally overturn to be as the criterion and set.R
4Be IC
2Open leakage pull-up resistor.
From the induced potential V that H obtains, the one tunnel behind attenuation network A, obtains the current sampling signal V that is directly proportional with i
1, deliver to IC
15,6 pin between; Another road is added on IC through clamping circuit
2In-phase input end, though when this voltage be negative polarity or for positive polarity less than V
3The time, IC
2Be output as 0, have only when being added on the positive polarity voltage amplitude of in-phase end greater than V
3The time, IC
2Just overturn and the output high level.Therefore, IC
2Amplitude with the V that i becomes, is transformed into the direct impulse voltage of the permanent width of cloth.This voltage obtains one and the proportional voltage sampling signal V of line voltage behind attenuation network B
2, be added to IC
17,8 pin between.IC
1According to V
1, V
2Product, be converted into electric energy metrical pulse, wherein low-frequency bidirectional pulse is exported from 23,24 pin, for driving M to drive usefulness such as type drum metering; High-frequency direct impulse is exported from 22 pin, for work indication, verification or and usefulness such as other circuit, equipment interface.
When this programme applied to wheeled apparatus, H must use forcipated mutual-inductor; When applying to stationary installation, except that the current transformer sampling of possible constructions closure, also available little value resistor sampling, V simultaneously
2Also can directly take from line voltage by attenuating network.
5.3 three of embodiment
The three-phase device against charge evasion can be with scheme shown in Figure 6.Respectively to three-phase current i
A, i
B, i
CSample, obtain sampled voltage V
A, V
BAnd V
C, deliver to summing circuit, obtain three-phase current sampled voltage V=V
A+ V
B+ V
C, V is converted into three-phase electric energy metering pulse FJ after delivering to the V/F translation circuit, and FJ delivers to the electric weight display circuit again.The also special chip of available three-phase electric energy meter as AT73C502 etc., is finished in the above-mentioned flow process from summation to the task of driving register.
6. effect and benefit
6.1 can tackle all stealing tricks
Any stealing trick all is to disregard or few quantity calculation is a purpose with user's electric energy meter.Therefore, tackle the stealing of any type of table meter, need only the variable comparison then and there with this device, whether how much stealing reach stealing, promptly comes into plain view.Tackle the circuit stealing, except that making comparisons with the variable of this device and user's electric energy meter, also available two wheeled apparatus are investigated along the line, as long as the variable of the side of reaching the standard grade is greater than the side of rolling off the production line, i.e. explanation has the circuit stealing to exist between the two, and the spacing of progressively dwindling both can find the stealing node.Tackle the employing guerrilla tactics, the electricity filching person of " you come me to stop, and you walk me and steal ", available stationary installation carry out monitoring incessantly in 24 hours, to find and to write down power-steeling quantity at any time.
But 6.2 overall monitor electrical network
Wheeled apparatus can motor-drivenly use, and the time needn't tear circuit or user's electric energy meter open in running, and is simple and convenient, but it can not 24 hours monitor full time electrical networks, and in most cases need lean on powered battery, the circuit relative complex, and totally cost is higher.And stationary installation can not maneuver, but can 24 hours monitor full time electrical networks, and circuit is simple relatively, and volume is less, and overall cost is lower.Therefore, both are combined, learn from other's strong points to offset one's weaknesses, can the overall monitor electrical network.
6.3 can with the complementation of ZL02221770.3 patented technology
This device has been equivalent to remove the whole of electricity consumption end detecting device in this patented technology, with receive circuit such as amplification, demodulation, decoding, judgement, warning in the feeder ear detecting device, only after the V/F conversion, install the one-level display circuit additional, therefore circuit is simple, cost descends, and still has the ability that tackles all stealing tricks, overall monitor electrical network.But compare with this patented technology, the automaticity of this device is low, and the stealing situation must be checked and examined to the scene one by one, must expend more manpower and materials.As seen both technical characterstics are just in time complementary, and they are combined, and just can bring out the best in each other, and plant the dragnet of opposing electricity-stealing.
6.4 considerable benefit
Stealing is the persistent ailment of electric industry department, is the serious public hazards of society.The huge loss that it causes is visible one spot from some fragmentary report only." Wuhan evening paper " on January 12nd, 2003, front page was that title " is appealed the electric people of local legislation strike robber " with " stealing: 1 year 300000000 degree ".A9 version on June 17 further report again: " the stolen electric energy in Wuhan 1 year economic loss 1.5 hundred million surplus yuan ".The insider points out, these the 1.5 hundred million yuan direct loss of the electricity charge just also do not comprise as yet because of stealing the indirect loss that electricity causes accident such as the impaired and initiation fire of electric power facility to cause.And these data are that line loss by electrical network estimates, and normal line loss is about 4%, and the line loss of Wuhan Area is 9% at present, and some regional line loss is up to more than 15%, and as seen robber's electricity in these areas is also more rampant than Wuhan.50,000,000,000 degree under the estimation in view of the above, the annual stolen electric weight in the whole nation not, direct and indirect economic loss is not less than 30,000,000,000 yuan! This shows current urgency of opposing electricity-stealing, and can predict and implement the enormous benefits that Prevention Stealing Electricity Technology can obtain.
6.5 this device also can be used for detection of electrical leakage.
Claims (5)
1. device against charge evasion is characterized in that: by detecting the subscriber's line electric current and this detected value being scaled energy value, make comparisons with the variable of user's electric energy meter or relevant measuring apparatus with this energy value again, judge user whether stealing and power-steeling quantity thereof according to this; It needn't change online electric energy meter or relevant measuring apparatus when installing or operate.
2. device against charge evasion as described in claim 1, it is characterized in that: it contains circuit such as current sample, electric energy metrical and electric weight demonstration; Wherein current sampling circuit can adopt current transformer or little value resistor, and after to the sampling of subscriber's line current i, V delivers to ic for energy metering sampled voltage; Ic for energy metering can adopt the universal circuit of V/F conversion or the special chip of electronic electric energy meter, and the V value is scaled electric energy metrical pulse FJ, delivers to the electric weight display circuit; The electric weight display circuit can adopt registers such as character wheel sign indicating number, LED, LCD, shows the power consumption of this subscriber's line during detected.
3. device against charge evasion as described in claim 2, it is characterized in that: the electric energy metrical pulse FJ that after the V/F conversion, obtains, can deliver to the electric weight display circuit that the type drum that driven by d type flip flop IC and bidirectional pulse motor M etc. is formed, wherein the D of IC is connected to the Q end, and FJ adds to the CP end, is connected to Q and Q end after M and the capacitor C series connection, after FJ sends into, cause the alternate of Q and Q end level height, export the certain bidirectional pulse of width, drive M to drive the type drum metering by C; This FJ also can deliver to the circuit of functions such as having counting, storage, decoding, driving, with driving LED or LCD register.
4. a device against charge evasion as described in claim 2 is characterized in that: the special chip IC of available electron formula electric energy meter
1Finish the task of electric energy metrical and driving register; From the voltage V that current transformer H inducts, the one tunnel behind attenuating network A, obtains the current sampling signal V that is directly proportional with line current i
1, deliver to IC
15,6 pin between, another road is via R
1And D
1, D
2The clamping circuit of forming is clamped down on signal amplitude at D
1, D
2Threshold value in, deliver to voltage comparator ic then
2In-phase input end and by R
2, R
3Be added on IC after the dividing potential drop
2The voltage V of inverting input
3Compare, the voltage of just thinking in-phase end is that positive polarity and amplitude are slightly larger than V
3The time, IC
2Just overturn and the output high level, behind attenuating network B, obtain one and the proportional voltage sampling signal V of line voltage
2, deliver to IC
17,8 pin between, IC
1According to V
1And V
2Long-pending, be converted into electric energy metrical pulse, wherein low-frequency bidirectional measuring pulse is exported from 23,24 pin, for driving M with usefulness such as drive type drum meterings, high-frequency forward metrical pulse is exported from 22 pin, for work indication, verification or with usefulness such as other circuit, equipment interface.
5. device against charge evasion as described in claim 2 is characterized in that: the three-phase device against charge evasion can be to three-phase current i
A, i
B, i
CSampling obtains V respectively
A, V
B, V
C, obtain V=V through summing circuit
A+ V
B+ V
CAfter, V is delivered to the V/F translation circuit be converted into three-phase electric energy metering pulse FJ, again FJ is delivered to electric weight and show the road; Also can adopt the special chip of three-phase electric energy meter, finish above-mentioned flow process from suing for peace to the task of driving register.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510021734 CN1940577A (en) | 2005-09-26 | 2005-09-26 | Device against charge evasion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510021734 CN1940577A (en) | 2005-09-26 | 2005-09-26 | Device against charge evasion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1940577A true CN1940577A (en) | 2007-04-04 |
Family
ID=37958937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510021734 Pending CN1940577A (en) | 2005-09-26 | 2005-09-26 | Device against charge evasion |
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|---|---|
| CN (1) | CN1940577A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101968504A (en) * | 2010-09-16 | 2011-02-09 | 浙江永昌仪表有限公司 | Electricity stealing detecting comparison meter, power supply network capable of detecting electricity stealing and electricity stealing detection method |
-
2005
- 2005-09-26 CN CN 200510021734 patent/CN1940577A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101968504A (en) * | 2010-09-16 | 2011-02-09 | 浙江永昌仪表有限公司 | Electricity stealing detecting comparison meter, power supply network capable of detecting electricity stealing and electricity stealing detection method |
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