CN104851342B - A kind of anti-electricity-theft device for contact stealing and contactless stealing - Google Patents
A kind of anti-electricity-theft device for contact stealing and contactless stealing Download PDFInfo
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- CN104851342B CN104851342B CN201510257064.4A CN201510257064A CN104851342B CN 104851342 B CN104851342 B CN 104851342B CN 201510257064 A CN201510257064 A CN 201510257064A CN 104851342 B CN104851342 B CN 104851342B
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Abstract
The present invention relates to a kind of anti-electricity-theft device for contact stealing and contactless stealing,Including power supply,Strong magnetic monitoring modular,High frequency monitoring modular,Gate inhibition's monitoring modular,Alarm module and alarm monitoring terminal,The power supply is used to power to whole device,The strong magnetic monitoring modular is used to detect strong magnetic signal,And strong Magnetic testi signal is passed into alarm module,High frequency monitoring modular is used to detect high-frequency signal,And high-frequency detection signal is passed into alarm module,Gate inhibition's monitoring modular is used for the gate inhibition's signal for detecting electrical energy metering tank,And gate inhibition's signal of the electrical energy metering tank detected is passed into alarm module,The alarm module is used to receive strong Magnetic testi signal respectively,Gate inhibition's signal of high-frequency detection signal and electrical energy metering tank,Wirelessly output alarm signal gives alarm monitoring terminal,Carry out detection alarm.It can realize the automatic inspection to traditional stealing, wireless high-frequency interference stealing and strong magnetic disturbance stealing and alarm.
Description
Technical field
It is more particularly to a kind of to be directed to contact stealing the present invention relates to a kind of instructional device of power industry educational training
With the anti-electricity-theft device of contactless stealing.
Background technology
Anti-electricity-theft is a very important task in power marketing work, and Guo Wang companies put into substantial amounts of man power and material
The strick precaution opposed electricity-stealing, many achievements are achieved, change various wiring steathily in general has been able to progress effectively
Strick precaution, still, with the development of technology, the mode of electricity is stolen under the driving of interests also becomes variation, just it is current for
The stealing mode that the most hidden and current Guo Wang companies can not take precautions against mainly has：Strong magnetic stealing and wireless high-power high-frequency stealing
The mode of two kinds of motionless batch meter lead sealings.They are by disturbing electric energy meter internal component in certain distance outside case, drawing
Component failure is played, and then influences the normal work of ammeter, to reach the purpose of stealing.
Strong magnetic stealing：Permanent-magnetic field and electromagnetic field can all influence the normal metering of ammeter.Electricity filching person is placed around in ammeter
Strong magnetic magnet or big coil can disturb the correct metering of ammeter, reach the purpose of stealing.Strong magnetic magnet can also make power conversion
Transformer core saturation, cause electric energy meter operation DC voltage reduce or disappear.
The kicker magnet that stealing molecule uses at present manufactures for rare earth material, and it is than big 5 times or so traditional of magnet field strength（Greatly
Generally in 6000N/A.m）, volume is bigger, and magnetic is stronger.
High-power high-frequency stealing：User is disturbed ammeter using the intelligentized high-power wireless technology of special high-tech
The method of stealing is rampant in some regional stealings, and the gesture stretched, it is using the high-power wireless signal of electricity filching device to electricity
The CPU of table is disturbed, and makes ammeter cisco unity malfunction, is disregarded or is lacked quantity calculation, can also recover ammeter metering at any time, this to steal
The method for electrically operating time is short, disguised very strong, and launches the purpose that high-power signal disturbs ammeter with regard to that can reach outside electricity box,
Motionless any power equipment, so power supply department but can not find any clues and traces in the case where knowing its stealing perfectly well at the scene.
High-frequency Interference source operation principle：Conventional electricity filching device, signal amplified using 400MHZ ~ 470MHZ signal sources
Intensity is original 68 times.At present, all electronic electricity meters and terminal can not all bear so big interference strength.High-power letter
Number generator jamming equipment intensity is 680V/m.More than 68 times of national standard！Under the conditions of strong jamming, intelligent electric meter constantly resets
Or crash, it is impossible to normal metering.
The content of the invention
The purpose of the present invention is in view of the deficienciess of the prior art, providing a kind of for contact stealing and contactless
The anti-electricity-theft device of stealing, it can realize the automatic inspection to traditional stealing, wireless high-frequency interference stealing and strong magnetic disturbance stealing
With alarm, and detect it is time-consuming less, easily realize, effect is good, cost is low.
The object of the present invention is achieved like this：A kind of thief-proof Denso for contact stealing and contactless stealing
Put, including power supply, strong magnetic monitoring modular, high frequency monitoring modular, gate inhibition's monitoring modular, alarm module and alarm monitoring terminal, institute
Power supply to be stated to be used to give whole device power supply, the strong magnetic monitoring modular is used to detect strong magnetic signal, and by strong Magnetic testi
Signal passes to alarm module, and the high frequency monitoring modular is used to detect high-frequency signal, and high-frequency detection signal is passed
Alarm module is passed, gate inhibition's monitoring modular is used for the gate inhibition's signal for detecting electrical energy metering tank, and the electric energy meter that will be detected
Gate inhibition's signal of measuring tank passes to alarm module, and the alarm module is used to receive strong Magnetic testi signal, high-frequency detection letter respectively
Number and electrical energy metering tank gate inhibition's signal, wirelessly output alarm signal to alarm monitoring terminal, detected
Alarm.
The high frequency monitoring modular includes antenna, antenna matching network, attenuation network, detecting circuit, microcontroller and defeated
Go out circuit, the antenna is connected with antenna matching network, and the antenna matching network is connected with attenuation network, the attenuation network
It is connected with detecting circuit, the detecting circuit is connected with microcontroller, and the microcontroller is connected with output circuit.The high frequency is supervised
It is good to survey module Detection results, detecting distance is remote, near adjustable, and reliability is high, cost is low, small volume, is put into batch meter and installs
It is more convenient.
The antenna matching network includes inductance L1 and the 6th electric capacity C6, one end of the 6th electric capacity C6 and antenna
Connection, one end with inductance L1, the input of attenuation network are connected the other end of the 6th electric capacity C6 respectively, the inductance
L1 other end ground connection.
The attenuation network includes some resistance R2, R3, R4, electric capacity C7, C8, C9, the output end point of antenna matching network
One end, the 3rd resistance R3 one end not with the 4th resistance R4 are connected, the 4th resistance R4 other end ground connection, the 3rd resistance
One end with the 7th electric capacity C7, the 2nd resistance R2 one end and the input of detecting circuit are connected the R3 other end respectively,
7th electric capacity C7 other end ground connection, the 2nd resistance R2 other end ground connection, the 8th electric capacity C8 both ends respectively with the 3rd
Resistance R3 both ends connection, the both ends of the 9th electric capacity C9 both ends respectively with the 4th resistance R4 are connected.
The detecting circuit uses finished product detection chip of the output form for dBV.
The output circuit includes photo-coupler U3, triode Q1 and some resistance, the base stage warp of the triode Q1
The output end of first resistance R1 and controller connects, the grounded emitter of the triode Q1, the current collection of the triode Q1
Pole is connected with a photo-coupler U3 input, and photo-coupler U3 another input is defeated through the 5th resistance R5 and power supply
Go out end connection, a photo-coupler U3 output end and the input of alarm module connect, photo-coupler U3 another output
End ground connection.
The strong magnetic monitoring modular includes logical operation module and some strong magnetic signal inductive switch K1-K8, described to patrol
Collect computing module and use nor gate logical operation module or OR gate logical operation module, the logical operation module exports with power supply
End connection, some strong magnetic signal inductive switch K1-K8 one end are connected with power output end, some strong magnetic signal inductive switches
The K1-K8 other end is connected with each input of logical operation module respectively, the output end and report of the logical operation module
The input connection of alert module.The strong magnetic signal inductive switch uses tongue tube or magnetic relay.Each strong magnetic signal sensing
Switch and LED signal lamp, resistant series are between the both positive and negative polarity of power supply.The output end of logical operation module and low level signal lamp
LEDR9 negative pole connection, low level signal lamp LEDR9 positive pole are connected through resistance R9 with power output end VCC.Logical operation mould
The output end of block is connected with high level signal lamp LEDR10 positive pole, and high level signal lamp LEDR10 negative pole connects through resistance R10
Ground.
Gate inhibition's monitoring modular includes limit switch K12, some resistance R11, R12, a limit switch K12 termination
Ground, input respectively through resistance and alarm module of the limit switch K12 other end, power output end connection.
The alarm module is arranged in shielding shell, while module ground carries out earth shield with shielding shell.The screen
Cover shell and use masking foil or copper sheet can etc..
The alarm module uses SMS communication module.
Using such scheme, make the present invention that there is advantages below：Because this is directed to contact stealing and contactless stealing
Anti-electricity-theft device, including power supply, strong magnetic monitoring modular, high frequency monitoring modular, gate inhibition's monitoring modular, alarm module and alarm prison
Depending on terminal, the strong magnetic monitoring modular is used to detect strong magnetic signal, and strong Magnetic testi signal is passed into alarm module,
The high frequency monitoring modular is used to detect high-frequency signal, and high-frequency detection signal is passed into alarm module, the door
Prohibit gate inhibition's signal that monitoring modular is used to detect electrical energy metering tank, and gate inhibition's signal of the electrical energy metering tank detected is passed to
Alarm module, the alarm module are used for the door for receiving strong Magnetic testi signal, high-frequency detection signal and electrical energy metering tank respectively
Prohibit signal, wirelessly output alarm signal gives alarm monitoring terminal, carries out detection alarm.Using said structure so that
The present invention can alarm conventional contact stealing, untouchable to high-power high-frequency stealing can be disturbed to alarm,
The untouchable stealing of strong magnetic disturbance can be alarmed, reliability is high, sensitivity is strong.
And configuration aspects are lighter, it is easy to carry to scene；Meet live actual and Field Force's operating habit；Can be fast
The installation of speed, so the explanation and training to shop floor worker are relatively easy to；The very big space of metering cabinet will not be taken, so that will not
Wiring topology before change.
The invention will be further described with reference to the accompanying drawings and examples.
Brief description of the drawings
Fig. 1 is the present invention for contact stealing and the circuit theory diagrams of the anti-electricity-theft device of contactless stealing；
Fig. 2 is the circuit theory diagrams of the high frequency monitoring modular of the present invention；
Fig. 3 is the circuit diagram of the high frequency monitoring modular of the present invention；
Fig. 4 is the circuit diagram of the 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 the alarm module of the present invention；
Fig. 7 is attenuation network simulated properties schematic diagram；
Fig. 8 is experiment porch circuit diagram.
Embodiment
Referring to Fig. 1 to Fig. 6, a kind of anti-electricity-theft device for contact stealing and contactless stealing, including it is power supply, strong
Magnetic monitoring modular, high frequency monitoring modular, gate inhibition's monitoring modular, alarm module and alarm monitoring terminal, the power supply are used for whole
Individual device power supply, the strong magnetic monitoring modular is used to detect strong magnetic signal, and strong Magnetic testi signal is passed into alarm
Module, the high frequency monitoring modular is used to detect high-frequency signal, and high-frequency detection signal is passed into alarm module, institute
Gate inhibition's signal that gate inhibition's monitoring modular is used to detect electrical energy metering tank is stated, and gate inhibition's signal of the electrical energy metering tank detected is passed
Alarm module is passed, the alarm module is used to receive strong Magnetic testi signal, high-frequency detection signal and electrical energy metering tank respectively
Gate inhibition's signal, wirelessly output alarm signal to alarm monitoring terminal, carry out detection alarm.Dissipated in view of volume
Heat problem, in the design applicant selected the reverse exciting switching voltage regulator of small size so that can in very wide voltage range
The work leaned on.Direct voltage output of the reverse exciting switching voltage regulator by 220V Power converts into each amplitude, such as 5V, 3.3V.It is described
Monitoring terminal of alarming has the mobile terminal of SMS using mobile phone etc..
Referring to Fig. 2, the high frequency monitoring modular includes antenna, antenna matching network, attenuation network, detecting circuit, micro-control
Device and output circuit processed, the antenna are connected with antenna matching network, and the antenna matching network is connected with attenuation network, described
Attenuation network is connected with detecting circuit, and the detecting circuit is connected with microcontroller, and the microcontroller is connected with output circuit.
The high frequency monitoring modular Detection results are good, and detecting distance is remote, near adjustable, and reliability is high, cost is low, small volume, is put into metering
Installation is more convenient in case.
Referring to Fig. 3, the antenna matching network includes inductance L1 and the 6th electric capacity C6, and the one of the 6th electric capacity C6
End is connected with antenna, and one end with inductance L1, the input of attenuation network are connected the other end of the 6th electric capacity C6 respectively,
The other end ground connection of the inductance L1.
Because detection signal is wideband radio wave, so using the dipole antenna in broadband on antenna form, pass through
The impedance matching of adjustment antenna makes antenna have relatively flat gain curve in 300MHZ to 1000MHZ frequency, due to
The field strength of detection is bigger, so the reduction antenna gain also to be tried one's best, this antenna is marked in [Fig. 3] ANT parts.
The attenuation network includes some resistance R2, R3, R4, electric capacity C7, C8, C9, the output end point of antenna matching network
One end, the 3rd resistance R3 one end not with the 4th resistance R4 are connected, the 4th resistance R4 other end ground connection, the 3rd resistance
One end with the 7th electric capacity C7, the 2nd resistance R2 one end and the input of detecting circuit are connected the R3 other end respectively,
7th electric capacity C7 other end ground connection, the 2nd resistance R2 other end ground connection, the 8th electric capacity C8 both ends respectively with the 3rd
Resistance R3 both ends connection, the both ends of the 9th electric capacity C9 both ends respectively with the 4th resistance R4 are connected.
Because detection field strength is very big, even if using the relatively low antenna of the ratio of gains, the signal intensity collected is also much big
In the input limits of detecting circuit, so needing to add an attenuation network between antenna and detecting circuit, decay ensureing
Enough bandwidth are also ensured while flatness.- 41dB should be by the attenuation network calculated herein, by microwave circuit
Emulation be defined as one-level decay, attenuation network simulated properties are as shown in Figure 7.From simulation result as can be seen that in the frequency used
Attenuation network only has 0.12dB fluctuation in the range of rate, can meet requirement completely.
The detecting circuit uses finished product detection chip of the output form for dBV.Detecting circuit has a variety of forms can be with
Use, the most common are detector diode composition simple wave detector, although this circuit cost is cheap, detection it is accurate
Degree, the linearity and uniformity are all difficult to ensure, for these reasons, finished product detection chip are employed in the design, by right
Than the AD8314 of ADI companies is relatively adapted to this project application.AD8314 output form is dBV, is just removed from this project
The dBm and V/m of general detection chip output translation operation.And this device -60dBV to -15dBV sections have it is very good
The linearity, 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 seldom, so having selected STM32F030F4P6 microcontrollers.STM32F030
Series of MCU uses the Cortex-M0 kernels of 32, has 48MHZ bus clock, has been internally integrated 12 AD conversion
Device, it is especially suitable for the high precision collecting system of medium operand.Simultaneously because ST companies to widely popularize this type product great
Price advantage, unique deficiency is exactly that IO quantity is few, but enough for this project.
The output circuit includes photo-coupler U3, triode Q1 and some resistance, the base stage warp of the triode Q1
The output end of first resistance R1 and controller connects, the grounded emitter of the triode Q1, the current collection of the triode Q1
Pole is connected with a photo-coupler U3 input, and photo-coupler U3 another input is defeated through the 5th resistance R5 and power supply
Go out end connection, a photo-coupler U3 output end and the input of alarm module connect, photo-coupler U3 another output
End ground connection.
Due to being worked in strong electric field environment, so output circuit will possess two characteristics, first, being not susceptible to outside forceful electric power
Field interference, second, outside highfield can not be incorporated into sensor internal, will have very high Signal segregation degree.In view of this two
Individual factor, in the design applicant from optocoupler as output circuit, export as low level trigger signal SIN1-.
The strong magnetic monitoring modular includes logical operation module and some strong magnetic signal inductive switch K1-K8, described to patrol
Collect computing module and use nor gate logical operation module or OR gate logical operation module, the logical operation module exports with power supply
End connection, some strong magnetic signal inductive switch K1-K8 one end are connected with power output end, some strong magnetic signal inductive switches
The K1-K8 other end is connected with each input of logical operation module respectively, the output end and report of the logical operation module
The input connection of alert module.The strong magnetic signal inductive switch uses tongue tube or magnetic relay.Each strong magnetic signal sensing
Switch and LED signal lamp, resistant series are between the both positive and negative polarity of power supply.The one of each strong magnetic signal inductive switch of the present embodiment
End is connected with+5V voltages, and the positive pole of the other end connection LED signal lamp of each strong magnetic signal inductive switch, LED signal lamp is born
Pole resistance grounded.The output end of logical operation module is connected with low level signal lamp LEDR9 negative pole, low level signal lamp
LEDR9 positive pole is connected through resistance R9 with power output end VCC.The output end of logical operation module and high level signal lamp
LEDR10 positive pole connection, high level signal lamp LEDR10 negative pole are grounded through resistance R10.
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, LEDR10 are high level signal lamp.
By manufacturing experimently, debugging to this circuit, module is under 300MHz -900MHz, field strength range 400V/M -1000V/M
Signal can be accurately detected when being tested, and can trigger photo-coupler U3 conductings.There is high-intensity magnetic field using magnetic relay
Close to the principle that will be closed.By magnetic relay（K1-K8）The surrounding of electric energy meter is distributed in, when having high-intensity magnetic field close to electric energy
During gauge table, some magnetic relay (K1-K8）Closure ,+5V high level is connected, corresponding LED light（LEDR1-LEDR8）Point
It is bright and high level signal is transferred to HD14078 nor gate chips, low level trigger signal will be produced after nor gate processing again
SIN2-, while LEDR9 is lighted.If without high-intensity magnetic field close to magnetic relay（K1-K8）, HD14078 nor gates chip will output
High level SIN2+, LEDR10 are lighted.
During experiment, with magnet slowly close to magnetic relay, when circuit magnetic relay indicator lamp LEDR1 to LEDR8 is any one
At once away from magnetic relay when individual bright.Now module LEDR9 light setting mobile phone receive short message explanation prevent strong magnetic stealing circuit
Build correct.If it is indicated that lamp does not have bright or sets mobile phone not receive short message, illustrate that circuit builds mistake or mobile phone
Mistake is set.
Gate inhibition's monitoring modular includes limit switch K12, some resistance R11, R12, a limit switch K12 termination
Ground, input respectively through resistance and alarm module of the limit switch K12 other end, power output end connection.
When measuring chamber door closure, K12 closures, 0V low level SIN3- will be produced, when metering chamber door is opened, K12 breaks
Open, by generation+5V high level SIN3+.First drilled on the doorframe of batch meter, bore dia is 15mm or so.Gate inhibition's module is pacified
In hole, height of the regulation gate inhibition's module in hole just closes gate inhibition's module switch when closing the door of batch meter, meter
Gate inhibition module switch disconnects when measuring tank door is opened, and the above acts multiple mode, and mode is successfully by the fixation of gate inhibition's module from gate inhibition's mould
Block lead access short message module trigger point.It is " electrical energy metering tank is opened " to set trigger point short message with mobile phone.First by batch meter
Close, then batch meter is opened and now receives short message " electrical energy metering tank is opened ", repeat action above and mobile phone is set every time
Short message " electrical energy metering tank is opened " is received, illustrates Success in Experiment.
The alarm module is arranged in shielding shell, while module ground carries out earth shield with shielding shell.The screen
Cover shell and use masking foil or copper sheet can etc..The alarm module uses SMS communication module.Short message alarm module
For ready-made mature modules circuit, this module can be readily available in current market.The type of the SMS communication module of the present embodiment
Number it is SIM900A.Can be right when may mainly be influenceed in present apparatus running by wireless high-frequency high-power signal
GSM/CDMA signals are disturbed, and cause short message sending or reception failure, or even situation about crashing occur.For this, we are carried out
Shielding design, all modules are wrapped up with 0.15MM copper foil, while module ground and copper foil are carried out earth shield,
Trigger signal caused by the test module of high-frequency interferencing signal when SIN1, SIN2, SIN3 are respectively wireless high-power high-frequency interference
Gate inhibition examines when trigger signal SIN2 and batch meter are opened caused by the test module of strong magnetic disturbance signal when SIN1, strong magnetic disturbance
Survey trigger signal SIN3 caused by module.K13 is short message alarm module reset switch.
By being debugged to short message test module, can draw：
In frequency 300MHz -900MHz, field strength range 400V/M -1000V/M
1）During antenna distance interference source 0-50cm, short message test module is when pressing KA1, it is not possible to sends alarm 1 to report
Alert terminal（Mobile phone）；When pressing KA2, it is not possible to send alarm 2 to alarm terminal（Mobile phone）；When pressing KA3, it is not possible to send out
Alarm 3 is sent to alarm terminal（Mobile phone）, and there is situation about crashing.
2）During more than antenna distance interference source 50cm, short message test module can send alarm 1 to report when pressing KA1
Alert terminal（Mobile phone）；When pressing KA2, alarm 2 can be sent to alarm terminal（Mobile phone）；When pressing KA3, police can be sent
3 are reported to alarm terminal（Mobile phone）.
Therefore when using short message test module, transmitting antenna should be away from interference source, and distance is at least in more than 50cm.
This Novel anti-electricity-theft device mainly by being detected to strong magnetic signal and wireless high-power high-frequency signal, while
Electrical energy metering tank arranges switch gate control system, and detection alarm is carried out by way of radio SMS, can neither to reach electricity filching person
The mode of connection of part of changing the title of a reign steathily carrys out stealing, can not be by strong magnetic stealing and wireless high-power high-frequency mode come stealing purpose.This
Invention is by building test platform, 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, single phase low voltage electric energy
Their operation principle of table is substantially the same, but three line four-wire low-voltage electric energy meters are relatively common, and the relatively good solution of power supply
Certainly.So applicant uses three-phase four-wire low-voltage electric energy meter, applicant selects purely resistive load, A item bearing powers 40W here
Voltage 220V, B item bearing power 40W voltages 220V, C item bearing power 40W voltages 220V.Obtained by Watt's law P=UI, I=P/U
It is about IB=40W/220V ≈ 0.18A, C item rated current to go out A item rated current IA=40W/220V ≈ 0.18A, B item rated current
About IC=40W/220V ≈ 0.18A.It is smaller by A, B, C item electric current is calculated, if mutual using the bigger electric current of electric current
Sensor, then the electric current that Current Transformer Secondary side joint enters electric energy meter will be very small, and the detection of electric energy meter is with regard to unobvious, institute
5 are used with applicant：5A direct-type current transformer（The current transformer of direct-type is more accurate than straight-through current transformer）.
It is as shown in Figure 8 according to three line four-wire low-voltage connection box of electric energy meter principle wirings, experiment porch circuit diagram.
From electrical energy metering tank（Rated voltage 400V, secondary rated current 5A）Interior installation three-phase four-wire system electronic watt-hour
Table DTST726 types thereto is respectively connected on A, B, C item current transformer by wire extraction batch meter.Respectively by A, B,
(selecting 3P+1N types maximum current 6000A) is protected in tri- current transformer primary side access loads of C and three-level leakage, by plant-grid connection
Incoming end is protected in three-level leakage.
After each module test of Novel anti-electricity-theft device is proved to be successful, electric joint debugging and structure combination dress are carried out to each module
Match somebody with somebody, after overall debugging is completed on test platform, applicant carried out on probation.By the present apparatus according to electric energy metering cabinet installation dress
The requirement for putting wiring specification is installed into metering cabinet, and its control circuit will be certainly after Novel anti-electricity-theft device is powered in electric energy metering cabinet
Start building to make.Result on trial is as follows：
（1）Under frequency 300MHz -900MHz, field strength range 400V/M -1000V/M environment, device can detect height
Frequency high-power signal, and can be sent in the form of short message to detection alarm terminal（Mobile phone）；
（2）Under strong magnetic 1000N/A.m environment, device can detect strong magnetic signal, and can be sent in the form of short message to
Detect alarm terminal（Mobile phone）；
（3）When electrical energy metering tank is turned on or off, device can detect gate inhibition's signal, and can be sent in the form of short message
To detection alarm terminal（Mobile phone）.
Use checking：
（1）Device frequency under 300MHz -900MHz, field strength range 400V/M -1000V/M high-frequency wireless signals,
It can detect and alarm.Meet to propose covering 400MHz -470MHz, field strength 680V/M desired value.
（2）For device under strong magnetic 1000N/A.m environment, device can detect strong magnetic signal, and can be sent out in the form of short message
Deliver to detection alarm terminal（Mobile phone）；Meet that strong Magnetic testi is less than 6000N/A.m desired value, stealing molecule is also without close to meter
Our equipment just has been detected by when amount cabinet damages ammeter.So can preferably protection circuit equipment.
Conclusion：Realization of goal.Novel anti-electricity-theft device " reliability is high, sensitivity is strong "
Performance analysis：
The project not only " it is expected that economic benefit " significantly, and " social benefit " is also apparent from " intangible benefit ".
The present invention is for strong magnetic stealing, high-power high-frequency stealing and traditional contact most hidden at present, that be most difficult to strick precaution
The stealing modes such as formula is under-voltage, undercurrent, phase shift, expansion difference, and above-mentioned stealing situation is alarmed by short message.Contact should be directed to
The anti-electricity-theft device of stealing and contactless stealing be reasonably embedded in metering bin in, have it is light, easy to install, easy to operate,
The characteristics such as cost is low.
Claims (7)
- A kind of 1. anti-electricity-theft device for contact stealing and contactless stealing, it is characterised in that：Supervised including power supply, strong magnetic Module, high frequency monitoring modular, gate inhibition's monitoring modular, alarm module and alarm monitoring terminal are surveyed, the power supply is used for whole dress Power supply is put, the strong magnetic monitoring modular is used to detect strong magnetic signal, and strong Magnetic testi signal is passed into alarm module, The high frequency monitoring modular is used to detect high-frequency signal, and high-frequency detection signal is passed into alarm module, the door Prohibit gate inhibition's signal that monitoring modular is used to detect electrical energy metering tank, and gate inhibition's signal of the electrical energy metering tank detected is passed to Alarm module, the alarm module are used for the door for receiving strong Magnetic testi signal, high-frequency detection signal and electrical energy metering tank respectively Prohibit signal, wirelessly output alarm signal gives alarm monitoring terminal, carries out detection alarm；The high frequency monitoring modular includes antenna, antenna matching network, attenuation network, detecting circuit, microcontroller and output electricity Road, the antenna are connected with antenna matching network, and the antenna matching network is connected with attenuation network, the attenuation network and inspection Wave circuit is connected, and the detecting circuit is connected with microcontroller, and the microcontroller is connected with output circuit；The output circuit Including photo-coupler（U3）, triode（Q1）, the triode（Q1）Base stage through first resistance（R1）It is defeated with controller Go out end connection, the triode（Q1）Grounded emitter, the triode（Q1）Colelctor electrode and photo-coupler（U3）One Individual input connection, photo-coupler（U3）Another input through the 5th resistance（R5）It is connected with power output end, optical coupling Device（U3）An output end and alarm module input connect, photo-coupler（U3）Another output head grounding；High frequency Monitoring modular can be detected accurately when being tested under 300MHz -900MHz, field strength range 400V/M -1000V/M Signal comes, and can trigger photo-coupler（U3）Conducting；The strong magnetic monitoring modular includes logical operation module and some strong magnetic signal inductive switches（K1-K8）, the logic Computing module uses nor gate logical operation module or OR gate logical operation module, the logical operation module and power output end Connection, some strong magnetic signal inductive switches（K1-K8）One end be connected with power output end, some strong magnetic signal inductive switches （K1-K8）The other end be connected respectively with each input of logical operation module, the output end of the logical operation module with The input connection of alarm module.
- 2. the anti-electricity-theft device according to claim 1 for contact stealing and contactless stealing, it is characterised in that： The antenna matching network includes inductance L1 and the 6th electric capacity（C6）, the 6th electric capacity（C6）One end and antenna connect Connect, the 6th electric capacity（C6）The other end one end with inductance L1, the input of attenuation network are connected respectively, the inductance L1 other end ground connection.
- 3. the anti-electricity-theft device according to claim 1 for contact stealing and contactless stealing, it is characterised in that： The attenuation network includes some resistance（R2、R3、R4）, electric capacity（C7、C8、C9）, the output end of antenna matching network respectively with 4th resistance（R4）One end, the 3rd resistance（R3）One end connection, the 4th resistance（R4）The other end ground connection, the 3rd electricity Resistance（R3）The other end respectively with the 7th electric capacity（C7）One end, the 2nd resistance（R2）One end and detecting circuit input End connection, the 7th electric capacity（C7）The other end ground connection, the 2nd resistance（R2）The other end ground connection, the 8th electric capacity（C8）Two End respectively with the 3rd resistance（R3）Both ends connection, the 9th electric capacity（C9）Both ends respectively with the 4th resistance（R4）Both ends Connection.
- 4. the anti-electricity-theft device according to claim 1 for contact stealing and contactless stealing, it is characterised in that： The detecting circuit uses finished product detection chip of the output form for dBV.
- 5. the anti-electricity-theft device according to claim 1 for contact stealing and contactless stealing, it is characterised in that： Gate inhibition's monitoring modular includes limit switch（K12）, resistance（R11、R12）, limit switch（K12）One end ground connection, it is spacing Switch（K12）The other end respectively through resistance（R11、R12）Input, power output end with alarm module are connected.
- 6. the anti-electricity-theft device according to claim 1 for contact stealing and contactless stealing, it is characterised in that： The alarm module is arranged in shielding shell, while module ground carries out earth shield with shielding shell.
- 7. the anti-electricity-theft device for contact stealing and contactless stealing according to claim 1 or 6, its feature exist In：The alarm module uses SMS communication module.
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| CN201510257064.4A CN104851342B (en) | 2015-05-19 | 2015-05-19 | A kind of anti-electricity-theft device for contact stealing and contactless stealing |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109991456A (en) * | 2018-11-27 | 2019-07-09 | 广东电网有限责任公司 | A kind of active electric magnetic disturbance stealing warning device |
| CN110728814A (en) * | 2019-10-23 | 2020-01-24 | 国网山西省电力公司晋中供电公司 | Anti-electricity-stealing video evidence-obtaining and real-time warning device |
| CN112816751A (en) * | 2020-09-22 | 2021-05-18 | 微传智能科技（常州）有限公司 | Electricity stealing detection system and method |
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