CN104851342A - Electricity stealing prevention device aiming contact electricity stealing and noncontact electricity stealing - Google Patents
Electricity stealing prevention device aiming contact electricity stealing and noncontact electricity stealing Download PDFInfo
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Abstract
The invention relates to an electricity stealing prevention device aiming contact electricity stealing and noncontact electricity stealing. The electricity stealing prevention device comprises a power supply, a strong magnetism monitoring module, a high frequency monitoring module, an entrance guard monitoring module, an alarm module and an alarm monitoring terminal. The power supply is used for supplying power to the whole device. The strong magnetism monitoring module is used for detecting a strong magnetism signal and transmitting the strong magnetism signal to the alarm module. The high frequency monitoring module is used for detecting a high-frequency signal and transmitting the high-frequency detection signal to the alarm module. The entrance guard monitoring module is used for detecting an entrance guard signal of an electric energy metering box and transmitting the detected entrance guard signal of the electric energy metering box to the alarm module. The alarm module is used for respectively receiving the strong magnetism signal, the high-frequency detection signal and the entrance guard signal of the electric energy metering box and outputting an alarm signal to the alarm monitoring terminal via a wireless mode so as to perform detection alarm. Automatic inspection and alarm for conventional electricity stealing, wireless high-frequency interference electricity stealing and strong magnetism interference electricity stealing can be realized.
Description
Technical field
The present invention relates to a kind of instructional device of power industry educational training, particularly a kind of anti-electricity-theft device for contact stealing and contactless stealing.
Background technology
Anti-electricity-theft is a very important task in power marketing work, Guo Wang company drops into the strick precaution that a large amount of man power and materials carries out opposing electricity-stealing, many achievements are achieved, can effectively taking precautions against of various wiring is changed steathily for general, but, along with the development of technology, under the ordering about of interests, the mode of stealing electricity also becomes variation, and just the most hidden stealing mode being also current Guo Wang company cannot take precautions against mainly contains at present: the mode of strong magnetic stealing and the motionless batch meter lead sealing of wireless high-power high-frequency stealing two kinds.They are by disturbing electric energy meter internal component in the outer certain distance of case, causing components and parts malfunctioning, and then affect the normal work of ammeter, to reach the object of stealing.
Strong magnetic stealing: permanent-magnetic field and electromagnetic field all can affect the normal metering of ammeter.Electricity filching person places the correct metering that strong magnetic magnet or large coil can disturb ammeter near ammeter, reaches the object of stealing.Strong magnetic magnet can also make the transformer core of power conversion saturated, causes the operation DC voltage of electric energy meter reduce or disappear.
The kicker magnet that current stealing molecule uses is rare earth material manufacture, and its larger than traditional magnet field intensity about 5 times (probably at 6000N/A.m), the larger magnetic of volume is stronger.
High-power high-frequency stealing: user utilizes special high-tech intelligentized high-power wireless technology to carry out disturbing the method for stealing rampant in some regional stealing to ammeter, existing gesture of stretching, it utilizes the CPU of high-power wireless signal to ammeter of electricity filching device to disturb, make ammeter cisco unity malfunction, disregard or few quantity calculation, also can recover ammeter metering at any time, this stealing electricity method running time is short, disguise is very strong, and launch at table case the object that high-power signal just can reach interference ammeter outward, motionless any power equipment, so power supply department but can not find any clues and traces at the scene when knowing its stealing perfectly well.
High frequency interference source principle of work: conventional electricity filching device, adopt 400MHZ ~ 470MHZ signal source after amplifying, signal intensity is original 68 times.At present, all electronic electricity meters and terminal all cannot bear so large interference strength.Powerful signal generator jamming equipment intensity is 680V/m.Exceed national standard 68 times! Under strong jamming condition, intelligent electric meter constantly resets or crashes, and can not normally measure.
Summary of the invention
The object of the invention is the deficiency existed for prior art, a kind of anti-electricity-theft device for contact stealing and contactless stealing is provided, it can realize automatic inspection to traditional stealing, wireless high-frequency interference stealing and strong magnetic interference stealing and warning, and detect consuming timely to realize less, easily, effective, cost is low.
The object of the present invention is achieved like this: a kind of anti-electricity-theft device for contact stealing and contactless stealing, comprise power supply, strong magnetic monitoring modular, high frequency monitoring modular, gate inhibition's monitoring modular, alarm module and warning monitoring terminal, described power supply is used for powering to whole device, described strong magnetic monitoring modular is used for detecting strong magnetic signal, and by strong Magnetic testi signal transmission to alarm module, described high frequency monitoring modular is used for detecting high-frequency signal, and by high-frequency detection signal transmission to alarm module, described gate inhibition's monitoring modular is for detecting gate inhibition's signal of electrical energy metering tank, and by gate inhibition's signal transmission of electrical energy metering tank of detecting to alarm module, described alarm module is used for receiving strong Magnetic testi signal respectively, gate inhibition's signal of high-frequency detection signal and electrical energy metering tank, wirelessly output alarm signal is to warning monitoring terminal, carry out detection alarm.
Described high frequency monitoring modular comprises antenna, antenna matching network, attenuation network, detecting circuit, microcontroller and output circuit, described antenna is connected with antenna matching network, described antenna matching network is connected with attenuation network, described attenuation network is connected with detecting circuit, described detecting circuit is connected with microcontroller, and described microcontroller is connected with output circuit.This high frequency monitoring modular Detection results is good, detecting distance far, closely adjustable, and reliability is high, cost is low, and volume is little, puts into batch meter and installs more convenient.
Described antenna matching network comprises inductance L 1 and the 6th electric capacity C6, one end of described 6th electric capacity C6 is connected with antenna, the other end of described 6th electric capacity C6 is connected with one end of inductance L 1, the input end of attenuation network respectively, the other end ground connection of described inductance L 1.
Described attenuation network comprises some resistance R2, R3, R4, electric capacity C7, C8, C9, the output terminal of antenna matching network respectively with one end of the 4th resistance R4, one end of 3rd resistance R3 connects, the other end ground connection of the 4th resistance R4, the other end of the 3rd resistance R3 respectively with one end of the 7th electric capacity C7, one end of 2nd resistance R2 and the input end of detecting circuit connect, the other end ground connection of the 7th electric capacity C7, the other end ground connection of the 2nd resistance R2, the two ends of the 8th electric capacity C8 are connected with the two ends of the 3rd resistance R3 respectively, the two ends of the 9th electric capacity C9 are connected with the two ends of the 4th resistance R4 respectively.
Described detecting circuit employing output form is the finished product detection chip of dBV.
Described output circuit comprises photo-coupler U3, triode Q1 and some resistance, the base stage of described triode Q1 is connected with the output terminal of controller through first resistance R1, the grounded emitter of described triode Q1, the collector of described triode Q1 is connected with an input end of photo-coupler U3, another input end of photo-coupler U3 is connected with power output end through the 5th resistance R5, an output terminal of photo-coupler U3 is connected with the input end of alarm module, another output head grounding of photo-coupler U3.
Described strong magnetic monitoring modular comprises logical operation module and some strong magnetic signal inductive switch K1-K8, described logical operation module adopt rejection gate logical operation module or or gate logic computing module, described logical operation module is connected with power output end, one end of some strong magnetic signal inductive switch K1-K8 is all connected with power output end, the other end of some strong magnetic signal inductive switch K1-K8 is connected with each input end of logical operation module respectively, and the output terminal of described logical operation module is connected with the input end of alarm module.Described strong magnetic signal inductive switch adopts tongue tube or magnetic relay.Each strong magnetic signal inductive switch and LED signal lamp, resistant series are between the both positive and negative polarity of power supply.The output terminal of logical operation module is connected with the negative pole of low level signal lamp LEDR9, and the positive pole of low level signal lamp LEDR9 is connected with power output end VCC through resistance R9.The output terminal of logical operation module is connected with the positive pole of high level signal lamp LEDR10, and the negative pole of high level signal lamp LEDR10 is through resistance R10 ground connection.
Described gate inhibition's monitoring modular comprises limit switch K12, some resistance R11, R12, one end ground connection of limit switch K12, and the other end of limit switch K12 is connected through the input end of resistance and alarm module, power output end respectively.
Described alarm module is arranged in screening can, and module ground carries out grounded shield with screening can simultaneously.Described screening can adopts masking foil or copper sheet can etc.
Described alarm module adopts SMS communication module.
Adopt such scheme, the present invention is had the following advantages: because this is for the anti-electricity-theft device of contact stealing and contactless stealing, comprise power supply, strong magnetic monitoring modular, high frequency monitoring modular, gate inhibition's monitoring modular, alarm module and warning monitoring terminal, described strong magnetic monitoring modular is used for detecting strong magnetic signal, and by strong Magnetic testi signal transmission to alarm module, described high frequency monitoring modular is used for detecting high-frequency signal, and by high-frequency detection signal transmission to alarm module, described gate inhibition's monitoring modular is for detecting gate inhibition's signal of electrical energy metering tank, and by gate inhibition's signal transmission of electrical energy metering tank of detecting to alarm module, described alarm module is used for receiving strong Magnetic testi signal respectively, gate inhibition's signal of high-frequency detection signal and electrical energy metering tank, wirelessly output alarm signal is to warning monitoring terminal, carry out detection alarm.Adopt said structure that the present invention can be reported to the police to conventional contact stealing, can report to the police to the untouchable interference stealing of high-power high-frequency, can report to the police to the untouchable stealing of strong magnetic interference, reliability is high, sensitivity is strong.
And configuration aspects is lighter, be easy to carry to scene; Meet on-the-spot actual and field staff's operating habit; Can install fast, thus to the explanation of shop floor worker and training comparatively easy; The space that metering cabinet is very large can not be taken, thus can not former wiring topology be changed.
Below in conjunction with drawings and Examples, the invention will be further described.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the anti-electricity-theft device for contact stealing and contactless stealing of the present invention;
Fig. 2 is the circuit theory diagrams of high frequency monitoring modular of the present invention;
Fig. 3 is the circuit diagram of high frequency monitoring modular of the present invention;
Fig. 4 is the circuit diagram of strong magnetic monitoring modular of the present invention;
Fig. 5 is the circuit diagram of gate inhibition's monitoring modular of the present invention;
Fig. 6 is the circuit diagram of alarm module of the present invention;
Fig. 7 is attenuation network simulated properties schematic diagram;
Fig. 8 is experiment porch circuit diagram.
Embodiment
See Fig. 1 to Fig. 6, a kind of anti-electricity-theft device for contact stealing and contactless stealing, comprise power supply, strong magnetic monitoring modular, high frequency monitoring modular, gate inhibition's monitoring modular, alarm module and warning monitoring terminal, described power supply is used for powering to whole device, described strong magnetic monitoring modular is used for detecting strong magnetic signal, and by strong Magnetic testi signal transmission to alarm module, described high frequency monitoring modular is used for detecting high-frequency signal, and by high-frequency detection signal transmission to alarm module, described gate inhibition's monitoring modular is for detecting gate inhibition's signal of electrical energy metering tank, and by gate inhibition's signal transmission of electrical energy metering tank of detecting to alarm module, described alarm module is used for receiving strong Magnetic testi signal respectively, gate inhibition's signal of high-frequency detection signal and electrical energy metering tank, wirelessly output alarm signal is to warning monitoring terminal, carry out detection alarm.Consider volume heat dissipation problem, applicant has selected the reverse exciting switching voltage regulator of small size in the design, makes it possible to work reliably in very wide voltage range.220V Power convert is become the direct voltage output of each amplitude, as 5V, 3.3V etc. by reverse exciting switching voltage regulator.Described warning monitoring terminal adopts mobile phone etc. to have the mobile terminal of SMS.
See Fig. 2, described high frequency monitoring modular comprises antenna, antenna matching network, attenuation network, detecting circuit, microcontroller and output circuit, described antenna is connected with antenna matching network, described antenna matching network is connected with attenuation network, described attenuation network is connected with detecting circuit, described detecting circuit is connected with microcontroller, and described microcontroller is connected with output circuit.This high frequency monitoring modular Detection results is good, detecting distance far, closely adjustable, and reliability is high, cost is low, and volume is little, puts into batch meter and installs more convenient.
See Fig. 3, described antenna matching network comprises inductance L 1 and the 6th electric capacity C6, one end of described 6th electric capacity C6 is connected with antenna, and the other end of described 6th electric capacity C6 is connected with one end of inductance L 1, the input end of attenuation network respectively, the other end ground connection of described inductance L 1.
Because detection signal is wideband radiowave, so adopt the dipole antenna in broadband on antenna form, antenna is made to have more smooth gain trace in the frequency of 300MHZ to 1000MHZ by the impedance matching adjusting antenna, because the field intensity detected is larger, so the reduction antenna gain also will tried one's best, this antenna marks in [Fig. 3] ANT part.
Described attenuation network comprises some resistance R2, R3, R4, electric capacity C7, C8, C9, the output terminal of antenna matching network respectively with one end of the 4th resistance R4, one end of 3rd resistance R3 connects, the other end ground connection of the 4th resistance R4, the other end of the 3rd resistance R3 respectively with one end of the 7th electric capacity C7, one end of 2nd resistance R2 and the input end of detecting circuit connect, the other end ground connection of the 7th electric capacity C7, the other end ground connection of the 2nd resistance R2, the two ends of the 8th electric capacity C8 are connected with the two ends of the 3rd resistance R3 respectively, the two ends of the 9th electric capacity C9 are connected with the two ends of the 4th resistance R4 respectively.
Very large owing to detecting field intensity, even if use the antenna that gain is lower, the signal intensity collected also is far longer than the input limits of detecting circuit, so need to add an attenuation network between antenna and detecting circuit, while guarantee decay flatness, also will ensure enough bandwidth.Should be-41dB by the attenuation network calculated herein, by being defined as one-level decay to the emulation of microwave circuit, attenuation network simulated properties as shown in Figure 7.As can be seen from simulation result, in the frequency range used, attenuation network only has the fluctuation of 0.12dB, can meet request for utilization completely.
Described detecting circuit employing output form is the finished product detection chip of dBV.Detecting circuit has a variety of form to use, the modal simple and easy wave detector for detector diode composition, although this circuit cost is cheap, but the accuracy of detection, the linearity and consistance are all difficult to ensure, in view of these reasons, in the design, have employed finished product detection chip, by contrast, the AD8314 of ADI company is relatively applicable to this project application.The output form of AD8314 is dBV, just eliminates the translation operation of dBm and the V/m that general detection chip exports in this project.And this device has the extraordinary linearity at-60dBV to-15dBV interval, the difference in full frequency band is also smaller, can meet the detection application of this sensor completely.
Because the I/O port used in the present invention is little, so selected STM32F030F4P6 microcontroller.STM32F030 Series of MCU adopts the Cortex-M0 kernel of 32, has the bus clock of 48MHZ, and inside is integrated with 12 bit A/D converters, is applicable to very much the high precision collecting system of medium operand.Simultaneously because this type product of wideling popularize of ST company has price advantage, unique deficiency is exactly that IO quantity is few, but enough for this project.
Described output circuit comprises photo-coupler U3, triode Q1 and some resistance, the base stage of described triode Q1 is connected with the output terminal of controller through first resistance R1, the grounded emitter of described triode Q1, the collector of described triode Q1 is connected with an input end of photo-coupler U3, another input end of photo-coupler U3 is connected with power output end through the 5th resistance R5, an output terminal of photo-coupler U3 is connected with the input end of alarm module, another output head grounding of photo-coupler U3.
Due in strong electric field environment work, so output circuit will possess two characteristics, one is be not easy to disturb by outside highfield, and two is outside highfield can not be incorporated into sensor internal, have very high Signal segregation degree.In view of these two factors, applicant selects optocoupler as output circuit in the design, exports as low level trigger pip SIN1-.
Described strong magnetic monitoring modular comprises logical operation module and some strong magnetic signal inductive switch K1-K8, described logical operation module adopt rejection gate logical operation module or or gate logic computing module, described logical operation module is connected with power output end, one end of some strong magnetic signal inductive switch K1-K8 is all connected with power output end, the other end of some strong magnetic signal inductive switch K1-K8 is connected with each input end of logical operation module respectively, and the output terminal of described logical operation module is connected with the input end of alarm module.Described strong magnetic signal inductive switch adopts tongue tube or magnetic relay.Each strong magnetic signal inductive switch and LED signal lamp, resistant series are between the both positive and negative polarity of power supply.One end of each strong magnetic signal inductive switch of the present embodiment is connected with+5V voltage, and the other end of each strong magnetic signal inductive switch connects the positive pole of LED signal lamp, the negative pole resistance grounded of LED signal lamp.The output terminal of logical operation module is connected with the negative pole of low level signal lamp LEDR9, and the positive pole of low level signal lamp LEDR9 is connected with power output end VCC through resistance R9.The output terminal of logical operation module is connected with the positive pole of high level signal lamp LEDR10, and the negative pole of high level signal lamp LEDR10 is through resistance R10 ground connection.
Required resistance is 1K, and K1 to K8 is magnetic relay, and LEDR1 to LEDR8 is magnetic relay signal lamp, and LEDR9 is low level signal lamp, and LEDR10 is high level signal lamp.
By manufacturing experimently this circuit, debugging, module, at 300MHz-900MHz, can detect signal when testing under field strength range 400V/M-1000V/M accurately, and can trigger optocoupler U3 conducting.Magnetic relay is utilized to have high-intensity magnetic field near the principle that will close.Magnetic relay (K1-K8) is distributed in the surrounding of electric energy meter, when there being high-intensity magnetic field near electric energy meter, certain magnetic relay (K1-K8) closes, + 5V high level is connected, corresponding LED light (LEDR1-LEDR8) is lighted and high level signal is transferred to HD14078 rejection gate chip, to produce low level trigger pip SIN2-again after rejection gate process, LEDR9 lights simultaneously.If do not have high-intensity magnetic field close to magnetic relay (K1-K8), HD14078HD14078 rejection gate chip will export high level SIN2+, and LEDR10 lights.
During test, with magnet slowly near magnetic relay, when circuit magnetic relay pilot lamp LEDR1 to LEDR8 any one bright time horse back away from magnetic relay.The mobile phone that now module LEDR9 lights setting receives note and illustrates that anti-strong magnetic stealing circuit is built correctly.If pilot lamp does not have bright or arranges mobile phone and do not receive note, illustrate that circuit builds mistake or mobile phone arranges mistake.
Described gate inhibition's monitoring modular comprises limit switch K12, some resistance R11, R12, one end ground connection of limit switch K12, and the other end of limit switch K12 is connected through the input end of resistance and alarm module, power output end respectively.
When measuring chamber door and closing, K12 disconnects, and will produce+5V high level SIN3+, and when measuring chamber door and opening, K12 connects, and will produce 0V low level signal trigger pip SIN3-.First hole on the doorframe of batch meter, bore dia is about 15mm.Gate inhibition's module is arranged in hole, gate inhibition's module switch is just made to close when regulating the height of gate inhibition's module in hole that the door of batch meter is closed, when metering chamber door is opened, gate inhibition's module switch is opened, above action repeatedly mode, gate inhibition's module is successfully fixed from gate inhibition's module lead-in wire access short message module 7 trigger point by mode.With mobile phone, trigger point 7 note is set for " electrical energy metering tank is opened ".First batch meter is closed, then batch meter is opened now receive note " electrical energy metering tank is opened ", repeat above action and mobile phone is set all receives note " electrical energy metering tank is opened ", illustrative experiment success at every turn.
Described alarm module is arranged in screening can, and module ground carries out grounded shield with screening can simultaneously.Described screening can adopts masking foil or copper sheet can etc.Described alarm module adopts SMS communication module.Short message alarm module is ready-made mature modules circuit, and this module can easily obtain in current market.The model of the SMS communication module of the present embodiment is SIM900A.Can disturb GSM/CDMA signal when mainly may be subject to the affecting of wireless high-frequency high-power signal in this plant running process, cause short message sending or take defeat, even occur situation about crashing.We conducted shielding design for this reason, the Copper Foil of all module 0.15MM wraps up, simultaneously module is carried out grounded shield with Copper Foil, the trigger pip SIN3 that when the trigger pip SIN2 that when the trigger pip SIN1 that when SIN1, SIN2, SIN3 are respectively the interference of wireless high-power high-frequency, the test module of strong magnetic interference signal produces, strong magnetic interference, the test module of strong magnetic interference signal produces and batch meter are opened, gate inhibition's detection module produces.K13 is short message alarm module reset switch.
By debugging note test module, can draw:
At frequency 300MHz-900MHz, field strength range 400V/M-1000V/M
1), during antenna distance reason interference source 0-50cm, note test module, when pressing KA1, cannot send alarm 1 to alarm terminal (mobile phone); When pressing KA2, alarm 2 to alarm terminal (mobile phone) cannot be sent; When pressing KA3, alarm 3 to alarm terminal (mobile phone) cannot be sent, and occur the situation of deadlock.
2), during antenna distance reason more than interference source 50cm, note test module, when pressing KA1, can send alarm 1 to alarm terminal (mobile phone); When pressing KA2, alarm 2 to alarm terminal (mobile phone) can be sent; When pressing KA3, alarm 3 to alarm terminal (mobile phone) can be sent.
Therefore when using note test module, emitting antenna should away from interference source, and distance is at least at more than 50cm.
This Novel anti-electricity-theft device is mainly through detecting strong magnetic signal and wireless high-power high-frequency signal, arrange switch gate access control system at electrical energy metering tank simultaneously, detection alarm is carried out by the mode of radio SMS, carry out stealing to reach can not change the title of a reign the steathily mode of connection of part of electricity filching person, stealing object can not be carried out by strong magnetic stealing and wireless high-power high-frequency mode.The present invention, by building test platform, is used for carrying out verification experimental verification to this anti-electricity-theft device.
Test platform is built: three-phase four-wire low-voltage electric energy meter and three-phase three-wire system low-voltage Watt-hour meter, their principle of work of single phase low voltage electric energy meter are substantially the same, but three line four-wire low-voltage electric energy meters are more common, and the relatively good solution of power supply.So applicant adopts three-phase four-wire low-voltage electric energy meter, applicant selects purely resistive load here, A item bearing power 40W voltage 220V, B item bearing power 40W voltage 220V, C item bearing power 40W voltage 220V.Draw A item rated current IA=40W/220V ≈ 0.18A by Watt's law P=UI, I=P/U, B item rated current is about IB=40W/220V ≈ 0.18A, and C item rated current is about IC=40W/220V ≈ 0.18A.By calculating, A, B, C item electric current is smaller, if with electric current, frequently the electric current that obtains of larger current transformer electric energy meter secondary side is very little, electric energy meter detects not obvious, so applicant adopts the direct-type current transformer (current transformer of direct-type is more accurate than straight-through current transformer) of 5:5A.Peace is according to three line four-wire low-voltage connection box of electric energy meter principle wirings, and experiment porch circuit diagram as shown in Figure 8.
Select in electrical energy metering tank (rated voltage 400V, secondary rated current 5A) and three-phase four-wire system electronic electric energy meter DTST726 type thereto is installed wire being drawn batch meter and accesses respectively on A, B, C item current transformer.Respectively A, B, C tri-current transformer primary side access loads and three grades are leaked and protect (selecting 3P+1N type maximum current 6000A), plant-grid connection three grades is leaked and protects incoming end.
After each module test of Novel anti-electricity-theft device is proved to be successful, electric uniting and adjustment and textural association assembling is carried out to each module, after test platform completes overall debugging, applicant carried out on probation.Be installed in metering cabinet by the requirement of this device foundation electric energy metering cabinet erecting device wiring specification, in electric energy metering cabinet, Novel anti-electricity-theft device energising its control circuit rear is by automatic operation.Result on trial is as follows:
(1) under frequency 300MHz-900MHz, field strength range 400V/M-1000V/M environment, device can detect high-frequency high-power signal, and can be sent to detection alarm terminal (mobile phone) with the form of note;
(2) under strong magnetic 1000N/A.m environment, device can detect strong magnetic signal, and can be sent to detection alarm terminal (mobile phone) with the form of note;
(3), when electrical energy metering tank is opened or closed, device can detect gate inhibition's signal, and can be sent to detection alarm terminal (mobile phone) with the form of note.
Use checking:
(1) device frequency is at 300MHz-900MHz, under the high-frequency wireless signals of field strength range 400V/M-1000V/M, can detect and report to the police.Meet the desired value proposing to cover 400MHz-470MHz, field intensity 680V/M.
(2) device is under strong magnetic 1000N/A.m environment, and device can detect strong magnetic signal, and can be sent to detection alarm terminal (mobile phone) with the form of note; Meet the desired value that strong Magnetic testi is less than 6000N/A.m, time stealing molecule does not also have close metering cabinet that ammeter is damaged, our equipment just detects.Like this can protection circuit equipment better.
Conclusion: realization of goal.Novel anti-electricity-theft device " reliability is high, sensitivity is strong "
Performance analysis:
This project not only " expection economic benefit " is remarkable, and " social benefit " and " intangible benefit " also clearly.
The present invention is directed to the stealing modes such as strong magnetic stealing, the high-power high-frequency stealing of at present the most hidden, the most difficult strick precaution and traditional contact is under-voltage, undercurrent, phase shift, expansion difference, and by note, above-mentioned stealing situation is reported to the police.Reasonably should be embedded in metering bin for anti-electricity-theft device of contact stealing and contactless stealing, the characteristic such as there is light, easy installation, easy to operate, cost is low.
Claims (10)
1. the anti-electricity-theft device for contact stealing and contactless stealing, it is characterized in that: comprise power supply, strong magnetic monitoring modular, high frequency monitoring modular, gate inhibition's monitoring modular, alarm module and warning monitoring terminal, described power supply is used for powering to whole device, described strong magnetic monitoring modular is used for detecting strong magnetic signal, and by strong Magnetic testi signal transmission to alarm module, described high frequency monitoring modular is used for detecting high-frequency signal, and by high-frequency detection signal transmission to alarm module, described gate inhibition's monitoring modular is for detecting gate inhibition's signal of electrical energy metering tank, and by gate inhibition's signal transmission of electrical energy metering tank of detecting to alarm module, described alarm module is used for receiving strong Magnetic testi signal respectively, gate inhibition's signal of high-frequency detection signal and electrical energy metering tank, wirelessly output alarm signal is to warning monitoring terminal, carry out detection alarm.
2. the anti-electricity-theft device for contact stealing and contactless stealing according to claim 1, it is characterized in that: described high frequency monitoring modular comprises antenna, antenna matching network, attenuation network, detecting circuit, microcontroller and output circuit, described antenna is connected with antenna matching network, described antenna matching network is connected with attenuation network, described attenuation network is connected with detecting circuit, described detecting circuit is connected with microcontroller, and described microcontroller is connected with output circuit.
3. the anti-electricity-theft device for contact stealing and contactless stealing according to claim 2, it is characterized in that: described antenna matching network comprises inductance L 1 and the 6th electric capacity (C6), one end of described 6th electric capacity (C6) is connected with antenna, the other end of described 6th electric capacity (C6) is connected with one end of inductance L 1, the input end of attenuation network respectively, the other end ground connection of described inductance L 1.
4. the anti-electricity-theft device for contact stealing and contactless stealing according to claim 2, it is characterized in that: described attenuation network comprises some resistance (R2, R3, R4), electric capacity (C7, C8, C9), the output terminal of antenna matching network respectively with one end of the 4th resistance (R4), one end of 3rd resistance (R3) connects, the other end ground connection of the 4th resistance (R4), the other end of the 3rd resistance (R3) respectively with one end of the 7th electric capacity (C7), one end of 2nd resistance (R2) and the input end of detecting circuit connect, the other end ground connection of the 7th electric capacity (C7), the other end ground connection of the 2nd resistance (R2), the two ends of the 8th electric capacity (C8) are connected with the two ends of the 3rd resistance (R3) respectively, the two ends of the 9th electric capacity (C9) are connected with the two ends of the 4th resistance (R4) respectively.
5. the anti-electricity-theft device for contact stealing and contactless stealing according to claim 2, is characterized in that: described detecting circuit adopts output form to be the finished product detection chip of dBV.
6. the anti-electricity-theft device for contact stealing and contactless stealing according to claim 2, it is characterized in that: described output circuit comprises photo-coupler (U3), triode (Q1) and some resistance, the base stage of described triode (Q1) is connected with the output terminal of controller through first resistance (R1), the grounded emitter of described triode (Q1), the collector of described triode (Q1) is connected with an input end of photo-coupler (U3), another input end of photo-coupler (U3) is connected with power output end through the 5th resistance (R5), an output terminal of photo-coupler (U3) is connected with the input end of alarm module, another output head grounding of photo-coupler (U3).
7. the anti-electricity-theft device for contact stealing and contactless stealing according to claim 1, it is characterized in that: described strong magnetic monitoring modular comprises logical operation module and some strong magnetic signal inductive switches (K1-K8), described logical operation module adopt rejection gate logical operation module or or gate logic computing module, described logical operation module is connected with power output end, one end of some strong magnetic signal inductive switches (K1-K8) is all connected with power output end, the other end of some strong magnetic signal inductive switches (K1-K8) is connected with each input end of logical operation module respectively, the output terminal of described logical operation module is connected with the input end of alarm module.
8. the anti-electricity-theft device for contact stealing and contactless stealing according to claim 1, it is characterized in that: described gate inhibition's monitoring modular comprises limit switch (K12), resistance (R11, R12), one end ground connection of limit switch (K12), the other end of limit switch (K12) is connected through the input end of resistance (R11, R12) and alarm module, power output end respectively.
9. the anti-electricity-theft device for contact stealing and contactless stealing according to claim 1, is characterized in that: described alarm module is arranged in screening can, and module ground carries out grounded shield with screening can simultaneously.
10. the anti-electricity-theft device for contact stealing and contactless stealing according to claim 1 or 9, is characterized in that: described alarm module adopts SMS communication module.
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| CN104851342B (en) | 2018-01-30 |
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