CN103916207B - A kind of active multiband power line communication jamming equipment and method - Google Patents

A kind of active multiband power line communication jamming equipment and method Download PDF

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Publication number
CN103916207B
CN103916207B CN201410144149.7A CN201410144149A CN103916207B CN 103916207 B CN103916207 B CN 103916207B CN 201410144149 A CN201410144149 A CN 201410144149A CN 103916207 B CN103916207 B CN 103916207B
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power
signal
power line
module
equipment
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CN103916207A (en
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卢继华
叶能
于含笑
唐堂
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Beijing Institute of Technology BIT
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Beijing Institute of Technology BIT
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Abstract

The present invention relates to a kind of active multiband power line communication jamming equipment and method, belong to the correlative technology fields such as power line transmission, power line communication, power line interference, information security, electric power networks and communication, be mainly used in obstructing the power line communication of multiband.The equipment includes power module, termination power, power adaptive interference source module, impedance matching box and drive module.The present invention can be to various frequency ranges(Add the international standard that band limits looks into arrowband power line communication)Arrowband power line communication apparatus implement interference.Present invention employs the active noise signal interference power line communication of power adaptive, can resist the power line communications apparatus of power adaptive, strengthen interference performance, and save the energy.

Description

A kind of active multiband power line communication jamming equipment and method
Technical field
The present invention relates to a kind of active multiband power line communication jamming equipment and method, belong to power line transmission, electricity The correlative technology fields such as line of force communication, power line interference, information security, electric power networks and communication, are mainly used in multiband Power line communication is obstructed.
Background technology
Because technology develops, the cable LAN application threshold based on arrowband power line communication is very low, and starts to popularize. Arrowband power line transmission equipment can be made small, and switch on power and can be carried out transmitting.Therefore such as power line meter reading, power line Call transmission etc. is applied, and is provided convenience for the lives of the people.X-10 agreements and relevant device such as originating from the U.S. can pass through Power line carries out remote control to electronic equipment;Rui Lang groups have developed its amplifier apparatus in recent years, further promote The use of power line device.
Intellectual property output in terms of power line communication and its jamming equipment, have following several:
Power line application aspect has:" intelligent electric meter based on power line network transmission "(The patent No. CN201320030263.8)A kind of intelligent electric meter for carrying processor, please can carrying out power line communication is proposed, it is final to realize Automatic data logging." a kind of cloud air-conditioning system based on power line transmission signals "(Patent No. CN201210425589.0), by cloud Power line and network signal line used in air-conditioning are combined into one, and are reduced laying and the cost of circuit, are facilitated the life of people.
Have in terms of power line antijam communication:Utility model patent " power line carrier anti-interference communication device "(Patent Number CN201020161616.4)The anti-interference method and equipment of a kind of power line carrier communication are given, power line is overcome and does The defects of being easily damaged communicating terminal and causing to communicate error code is disturbed, the efficient communication of low-voltage power line carrier is realized, reduces Equipment damage.In addition invention " a kind of device of the suppressor pulse interference in electric line communication system "(Application number: 03105317.3), interference protection measure is proposed particular for impulse disturbances;" power line channel powerful interference signal suppresses dress for invention Put middle noise suppression circuit "(Patent No. CN203301478U)The method and apparatus of proposition can suppress noise to power line communication Interference.Patent of invention " suppressing method and its circuit structure of voltage Power Line Carrier Channel powerful interference signal "(Patent No. Patent CN103338080A)Various forms of very noisies that may be present in the transmission channel of power line communication are proposed with the side of suppression Method and equipment, and achieve good achievement.
The related product of existing arrowband power line transmission and equipment, its transmission band use 30-150KHz frequency ranges mostly. The signal all the way of power line communications apparatus occupies tens and arrives 100Hz;Under the conditions of electromagnetic compatibility is met, power is often 0.5W-2W; In addition, power line communications apparatus is compact, reliable so that arrowband power line transmission equipment is easily configured speech transducer, and connects Eavesdropping can be achieved in electric wire;This is to some important technical conference scenes, the project implementation field of the live need for confidentiality of evaluation Bring huge threat.The foregoing jamming equipment product or patent and utility model for being related to " arrowband power line transmission ", it is main To be directed to low-voltage power line communication, suppress very noisy circuit, mainly both for arrowband power line communications apparatus.It yet there are no Report is for multiband, active anti-tampering power line product and Patents.
The content of the invention
The invention aims to propose a kind of active multiband power line communication jamming equipment and method, the equipment Power line communication can be suppressed and solve the problems, such as power line communication eavesdropping.
The purpose of the present invention is achieved through the following technical solutions.
A kind of active multiband power line communication jamming equipment of the present invention, the equipment include power module, coupling electricity Road, power adaptive interference source module, impedance matching box and drive module;
Described power module includes power transformer, bridge rectifier, wave filter and voltage-stablizer, the work(of power module Can be civilian civil power is converted into be adapted to below control and alternating current that voltage range that signal link uses is 3~12V.
The power transformer is converted to 220V AC voltage in the alternating current compared with low pressure, and is provided with frequency following circuit, So that the frequency fluctuation of civil power does not interfere with late-class circuit.
Positive and negative alternate sinusoidal voltage rectification is unidirectional pulsating volage by the bridge rectifier;
The mains ripple part that the wave filter exports bridge rectifier carries out smooth;
When the voltage-stablizer causes line voltage or load change, the voltage of output keeps stable.
Described termination power includes high-pass filter and adjustable transformer.The function of termination power is barrier low frequency 220V Voltage signal.
Described high-pass filter can be made up of filter joint network, and it is by the electric filter of 50Hz cities, by high-frequency signal Retention, by adjustable transformer, is transmitted to follow-up impedance matching module and power adaptive interference source;
Described adjustable transformer can nondestructively amplify high-frequency signal so that it can be identified by follow-up circuit.
Described power adaptive interference source module, is one or more sets.Often covering power adaptive interference source module includes Circuitry for signal measurement, analog-to-digital conversion module, embedded intelligence CPU module, noise signal generator and modulator.Power adaptive The function of interference source module is that the noise source output adaptive of control generation random signal is calculated according to power line channel condition Noise power.
Described circuitry for signal measurement receives the signal that termination power provides, and the voltage and current of signal is reasonably put Greatly, and it is sent into analog-to-digital conversion module.
Described analog-to-digital conversion module, the signal sampling that the high-frequency electrical line of force is communicated quantify to be sent into central computation unit.
Described embedded intelligence CPU module carries out spectrum analysis to high-frequency signal, finds the frequency spectrum where signal of communication, And estimate the energy of its communication;And frequency band and energy information according to where signal of communication, noise signal generator is controlled, is received Noise signal generator, the baseband noise of corresponding power is produced, then control modulator that baseband noise is modulated on frequency band.
With described embedded intelligence CPU module described noise signal generator can be controlled to produce making an uproar for certain power Sound.
It can control described modulator that noise signal is modulated into specific frequency with described embedded intelligence CPU module Section.The modulator can be replaced, and so as to be disturbed in different frequency range, match different application scenarios.
Described impedance matching box, it is one or more sets.Often set impedance matching box includes impedance measuring circuit, calculates control Circuit and variable capacitance inductance network;The function of impedance matching box is instant measurement time-variable impedance and matches the output resistance of interference source It is anti-.
Described impedance measuring circuit is an active electric network, and power line is regarded as into a broad sense resistance, hard by circuit Part sampling extraction phase and amplitude information.Due to this jamming equipment insertion power line position do not fix, by cause impedance when Become and mismatch, therefore, the impedance matching box design form of different frequency range is different.
After the amplitude-phase information that the calculating control circuit acquisition impedance measurement network provides is calculated and controlled Inductance or capacity cell in level impedance ground adaptation are matched.
The variable capacitance inductance network can be controlled by prime, and realize carry out group to inductance capacitance network in circuit Close matching.The impedance matching box can have a variety of forms, and the impedance of different adjustable extents can be designed with specific reference to application circuit Adaptation.
Described drive module includes blower fan and fan drive circuit;The function of drive module is connected in present device After power supply, the blower fan can adjust wind under draught fan control circuit control according to the watt level of power adaptive interference source The rotating speed of machine, complete the radiating of equipment.
Based on above-mentioned more set power adaptives interference source module and cover impedance matching box, embedded intelligence CPU module more Provide the signal intensity of different frequency range and the position in frequency band in power line channel, and control accordingly multiple signal generators and Modulator, different capacity and the interference noise of frequency range occur respectively, and by different impedance matching units, by noise signal Pour into power line communication channel.
A kind of active multiband power line communication interference method of the present invention, step are:
The method for introducing " disturbing an arrowband power line communications apparatus " first.
1)User learns that user first will when there is an arrowband power line communications apparatus access electric transmission network in power line This active multiband power line communication jamming equipment accesses electric transmission network by common plug.Assuming that the arrowband power line Communication device works are in fsignal, its operating power psignal, and user can not learn two parameters in advance.Separately reception is set to set It is standby remotely to receive the band signal X launched by transmitting equipmentsignal, transmission line power frequency is f50
2)By electric power source pair of module, the communication equipment is powered:
2.1 utilize the power transformer of power module, and 220V civil powers are converted into low-voltage AC;
2.2 utilize the bridge rectifier of power module, and low-voltage AC is rectified into approximate DC electricity;
2.3 utilize the wave filter of power module, and smooth, elimination HFS is carried out for the direct currents of foregoing 2.2 generations;
The virtual value of 2.4 civil powers may fluctuate in 220V or so, and then influence the stability of direct current after rectification.Therefore utilize (1) voltage-stablizer of power module, voltage stabilizing is carried out to direct current.
3)The communication equipment disturbs the cooperating of source module by termination power and power adaptive, realizes in circuit The analysis of power line communication channel and signal.
Frequency is f by high-pass filter in 3.1 termination powers50The electric filter of low frequency city, by the frequency band of power line communication Signal XsignalRetention, through the adjustable transformer in overcoupled circuits, it is transmitted to follow-up (3) power adaptive interference source and (4) resistance Anti- adaptation.In fact, due to noise and the presence of decline, the signal actually retained is X 'signal+N,X′signalAfter distortion Signal, N is noise.
3.2 power adaptives disturb circuitry for signal measurement, analog to digital conversion circuit and the embedded intelligence CPU module of source module Signal will be obtained to entering filtering at 3.1 to be calculated, analyze.Due to high frequency signal amplitude very little, so needing first by believing The high-frequency signal that termination power is sent out is amplified and is sent into analog to digital conversion circuit by number measuring circuit.Analog to digital conversion circuit is used Often signal is sampled and quantified with frequency range higher sample rate than relative arrowband power line communication.By above-mentioned steps, obtain Obtained X 'signal+ N sampling X 'signal(n)+N(n).Above-mentioned signal after sample quantization is sent into embedded by analog to digital conversion circuit Intelligent CPU module.
3.3 according to foregoing, primary signal XsignalFrequency domain information have occurred and that minor variations, and be superimposed high frequency and made an uproar Sound, therefore the embedded intelligence CPU module in power adaptive interference source module is needed to signal XsignalSpecific frequency range and energy Estimated.The signal that embedded intelligence CPU module obtains first carries out transform domain operation, obtains its power spectrum characteristicThen the fuzzy algorithmic approach according to power line channel feature is used, estimates primary signal Xsignal The lower bound of the frequency range at placeAnd the upper boundSo that confidence level of the signal in the range of bound is 95%. Then calculate the general power of the signal obtained after couplingPutting for circuitry for signal measurement should be considered in the calculation Greatly.
3.4 due to high-frequency signal being coupled using termination power when, still have Partial Power remain in power line letter In road.The test experience of power line communication coupling can be now utilized, is usedEstimate general power in the channelAnd it is stored in embedded intelligence CPU module.
4)The communication equipment disturbs the cooperating of source module and impedance matching box by power adaptive, realizes interference letter Number generation, modulation, and interference signal pours into
4.1 have estimated power line communication band information in arrowband to be disturbed by embedded intelligence CPU moduleAnd power informationAfter signal to noise ratio snr=1/r of setting interference, required do is drawn Disturbing power isThen the embedding of source module can be disturbed by (3) power adaptive Enter formula intelligence CPU module control noise signal generator produce power beNoise signal.
Noise signal in 4.1 using the modulator in power adaptive interference source module, is modulated to lower bound by 4.2And the upper boundCentre.
4.3 in order to be input to the noise signal caused by 4.2 on frequency band on power line, it is necessary to power line impedance and making an uproar Sound source impedance is matched.The impedance matching box in source module is disturbed using power adaptive, and combines embedded intelligence CPU moulds The computing capability of block, the matching of output impedance can be carried out, and then the power of noise source is exported into power line.Different electric power Gauze network can apply different impedance matching boxs, and then realize that noise power fully exports.
5)The communication equipment realizes the radiating of equipment by drive module, and then ensures the stability and safety of its work Property.
The voltage and current that fan drive circuit in 5.1 drive modules is exported by monitoring power module, monitoring are originally set Standby overall power.
5.2 after the equipment monitored in 5.1 reaches the threshold value of setting, in fan drive circuit driving (5) drive module Blower fan be operated, start active heat removal.
Generally, the above method realizes a feedback control system, utilizes the arrowband power line communication of measurement and estimation Signal is feedback variable, generates noise signal, and produces interference.
The lower method for briefly introducing " disturbing simultaneously multiple arrowband power line communications apparatus ".
The key step of this method and " disturbing an arrowband power line communications apparatus " unanimously, former approach In, the frequency range of only one arrowband power line communication.The latter then has multiple communications bands;It is mutually deserved, need within one device More set power adaptive interference source modules, including:Circuitry for signal measurement, analog-to-digital conversion module, embedded intelligence CPU module, make an uproar Sound signal generator, modulator.And more set impedance matching boxs include impedance measuring circuit, calculating control circuit and variable capacitance Inductance network.Repeating above-mentioned 1)、2)、3)、4)After step, multiple arrowband power line communication frequency bands are disturbed.
Beneficial effect
1)The present invention can be to various frequency ranges(Add the international standard that band limits looks into arrowband power line communication)Arrowband Power line communication apparatus implements interference.
2)Present invention employs the active noise signal interference power line communication of power adaptive, can resist power certainly The power line communications apparatus of adaptation, strengthen interference performance, and save the energy.
3)Frequency sweep analysis of the invention by setting frequency range, the frequency range where most probable signal of communication can be searched out, Finally realize in KHz magnitudes(Embody frequency range)Interference band it is adaptive.
4)The power line communication jamming equipment is a kind of new safety information product, and it, will by producing random noise The signal to noise ratio of destination channel frequency range drops to extremely low.
5)In the place of need for confidentiality, this equipment is inserted in any one wire and plug, goes for disturbing potential Power line communication interception facility work.
6)Power line communications apparatus can not send normal signal of communication by power line.
7)Required transmission signal is modulated to multiple tens by the present invention on the basis of conventional arrowband power line communications apparatus In KHz communication channel frequency ranges, number of frequency bands and width can be adjusted according to the difference of specific implementation environment, dynamic.During implementation, it incite somebody to action this Invention accesses power line LAN by power outlet, can realize that wide-band disturbs to the power line communication in this LAN.
8)The present invention is for that need to block the demand that power line communication prevents power line from eavesdropping, it is proposed that a kind of active more Frequency range power line communication interference method and equipment, lead to specifically, the present invention receives power line using embedded intelligence hardware circuit Believe the signal in channel, after carrying out sample quantization, according to different implementation environments, power line is analyzed with intelligent CPU module therein In each frequency band signals power, select different modulating device, actively produce noise signal, and be modulated on multiband, realization The signal to noise ratio of wider frequency section communication channel is reduced, so as to adaptively block power line eavesdropping.
Brief description of the drawings
Fig. 1 a are the active fixed one-segment power line communication jamming equipment in the embodiment of the present invention 1(Include power supply mould Block and drive module)System block diagram;Fig. 1 b are that the active adaptive frequency range power line communication interference in the embodiment of the present invention 2 is set It is standby(In order to observe conveniently, power module and drive module are eliminated)System block diagram;
Fig. 2 is the schematic diagram of embodiment 1 and embodiment 2, is done with Fig. 1 a active fixed one-segment power line communication Disturb equipment or arrowband power line communication is disturbed with Fig. 1 b active adaptive frequency range power line communication jamming equipments One embodiment;
Fig. 3 is the system block diagram of the active multiband power line communication jamming equipment in the embodiment of the present invention 3, in order to see Examine conveniently, eliminate power supply, blower fan and its driving.
Fig. 4 is the one embodiment disturbed with jamming equipment system shown in Fig. 3 arrowband power line communication.
Embodiment
For apparent principle of the invention, category and implementation, to the present invention, " a kind of active multiband power line leads to below Believe interference method and equipment ", the technical scheme in the embodiment of the present application is carried out with each accompanying drawing in conjunction with the embodiments clearly complete Description.
Embodiment 1
The present embodiment is the embodiment of " a kind of active multiband power line communication jamming equipment ", using active Fixed one-segment power line communication jamming equipment.Fig. 1 a and 1b and Fig. 2 is the schematic diagram of the present embodiment.Fig. 1 b are active multifrequencies Section power line communication jamming equipment, wherein 1.2 be termination power, 1.4 be impedance matching network, and 1.5 be that power adaptive disturbs Source module.In the present embodiment, treat that interference band is fixed to understand, Fig. 1 b equipment can be using abbreviation as equipment shown in Fig. 1 a, wherein 1.1 It is power module and drive module.1.2 be termination power, and 1.3 be power adaptive interference source module, and 1.4 be impedance matching box. Fig. 2 is its system block diagram, wherein 2.21 and 2.22 be respectively arrowband electric line communication system transmitting and receiving device;Based on 2.1 Dynamic formula arrowband power line communication jamming equipment.
Embodiment 2
The present embodiment is the embodiment of " a kind of active multiband power line communication jamming equipment ", using active multifrequency Section power line communication jamming equipment equipment.Fig. 1 b and Fig. 2 are the schematic diagrames of the present embodiment.The application scenarios of the present embodiment are electric power Line LAN, in actual applications, specific frequency range used by power line communications apparatus is not often known, now need adaptive Frequency range is converted, therefore using the active electric line of force communication jamming device in embodiment 2, the interference band of the communication jamming device It is variable.As shown in Figure 2, the present embodiment has accessed 2.21 in power line LAN, is set for certain arrowband power line communication transmitting Standby, 2.22 be certain arrowband power line communication receiving device in figure.
In the present embodiment, certain arrowband power line communication launches equipment by modulates baseband signals to frequency band.Its center frequency Rate is fsignal=30KHz, its occupied bandwidth can be neglected with respect to centre frequency;General power psignalUnder=0.1W normal works, Receiving device can remotely receive the band signal X launched by transmitting equipmentsignal.Separately power frequency component frequency is set as f50= 50Hz。
In the present embodiment, according to Fig. 2, equipment shown in Fig. 1 b is accessed in power line.1.2 termination powers in Fig. 2, Formed, high-frequency signal is coupled, then the signal is by filter joint and low-noise level transformer cascade in the present embodiment X′signal+N,X′signalFor the signal after distortion, N is noise.Subsequent signal is coupled circuit by high frequency signal transmission in Fig. 1 1.5 power adaptives disturb source module.
Circuitry for signal measurement is by X 'signal+ N amplifies the D/A converting circuit being sent into after 100 times in 1.5, with adopting for 100KHz Sample rate, sampled using sampling hold circuit and carry out 8 uniform quantizations.Now obtain data signal X 'signal(n)+N (n) the embedded intelligence CPU module for, being sent into 1.5 is analyzed and calculated.
Using Discrete Short Time Fourier Transform to data signal X ' in 1.5 embedded intelligence CPU modulesignal(n)+N (n) spectrum analysis is carried out, obtains its power spectral density information.The maximum frequency range model of power spectral density is found in power spectral density Enclose.Then with the lower bound of the frequency range where Gray system estimation arrowband electric-power wire communication signalWith it is upper BoundaryAnd the general power that primary signal is calculated according to the changed power of front stage circuits is less than
The power and frequency information obtained using embedded intelligence CPU module, controls the noise signal generator And modulator.
In this example, the adjustable noise signal generator in 1.5 is by a M signal generator(Mould 32), numerical control power puts Big device and peripheral circuit composition.Signal to noise ratio snr=1/r=1/50 of interference is set in this example;Embedded intelligence CPU module controls The power of adjustable noise signal generator output noise Noise signal 's
Modulator is digital modulation circuit in this example, and the noise signal is modulated into lower bound by embedded intelligence CPU moduleAnd the upper boundBetween.
1.4 impedance matching boxs are by frequency-adjustable power supply, variable LC resistor network, constant-resistance network and sampling in this example Device forms, and completing the function of impedance matching needs to use the computing function of embedded intelligence CPU module.Frequency adjustable is used first Source produces a lower boundAnd the upper boundBetween frequency 30KHz stable electricity Source.1.2 termination powers and power line are now regarded into a resistance, connected with the resistor network of itself in circuit, sampler To the high-frequency signal after frequency-adjustable power supply signal, coupling, the voltage signal in constant-resistance network are sampled.By counting Calculate the impedance for providing coupler and powerline systems.
The impedance matching box provided in this example includes data acquisition module, numerical control adjustable transformer inductance network.In this example Signal source and the output impedance of modulator are 100 ohm, and the impedance of data collecting module collected current power line is 116-j961 Ohm, and this numerical value is transported to embedded intelligence CPU module, it is rear according to the impedance for calculating current coupler and power line Value, provides capacitance and inductance value that impedance matching box should export, then can modulation by the control of embedded intelligence CPU module Depressor inductance network reaches expected 2uH.As a result the impedance after matching can be measured finally realizes impedance for 99+j18 ohms Match somebody with somebody so that the power of the circuit of noise signal injection is maximum.
Now power line communication receiving device in arrowband receives signal Xsignal, its power is less than 0.2W and Xinterrupt, its Power is more than 5W, and the signal to noise ratio in real channel is 0.04=- 14dB.Then because signal to noise ratio is too low, certain arrowband power line communication connects Receiving unit loses the ability of demodulation.
In the present embodiment, a feedback control is generally formed, wherein it is anti-to calculate control and signal estimation and control Feedback link.
Embodiment 3
The present embodiment system block diagram is as shown in Figure 3 and Figure 4.Equipment of the equipment shown in based on Fig. 1 b shown in Fig. 3, only increases More set resistance adaptation, noise signal source and modulators, they are independently controlled by embedded intelligence CPU module.
Seen by Fig. 4 and accessed multiple arrowband power line communication transmitting equipment in the present embodiment in power line LAN(Mark Number k=3 are arrived for 1).It is first assumed by modulates baseband signals to frequency band, if occupied mid-band frequency is is respectively50KHz andUnder normal work, 3 power line communications connect Receiving unit can remotely receive the band signal launched by transmitting equipment
Signal analysis link is similar with upper one embodiment in the present embodiment, complete measurement to power spectral density with Afterwards, by embedded intelligence CPU module by calculating and comparing, the number for determining arrowband power line communications apparatus is 3, and The lower bound of band limits where judging electric-power wire communication signal under 95% correct probability respectivelyAnd the upper bound Respectively 29.9KHz and 30.1KHz, 39.9KHz and 40.1KHz, and 49.9KHz and 50.1KHz, and with calculating general power ForRespectively 0.2W, 0.3W, 0.4W, these performance numbers are more than real performance number.
After completing corresponding data and calculating, according to data groupBy Embedded intelligence CPU module control noise signal generator, modulator composite module produce corresponding according to the method for embodiment 2 Noise signal on three frequency bands.Then it is complete by impedance matching box and embedded intelligence CPU module according to the method for embodiment 2 The impedance measurement of paired transmission line.The now impedance of emitter is 180 ohm.And the impedance of circuit is 179-j1024 ohms, thus it is embedding Enter the inductance value that formula intelligence CPU module control variable capacitance inductance network produces 2uH, circuit overall impedance is 182+ after matching J1.15, impedance matching is realized substantially.
Now power line communication receiving device in arrowband receives signal Xk,signalAnd Xk,interrupt, before the latter is higher by respectively Person is many, and power line communication receiver 1 to 3 is because signal to noise ratio is too low, and it will lose the ability of demodulation.
In a word, relatively good do is realized by disturbing multiple frequency ranges for arrowband power line communication, the present invention Disturb effect.
Described above is presently preferred embodiments of the present invention, and the present invention should not be limited to the embodiment and accompanying drawing institute is public The content opened.Every those skilled in the art does not make all embodiments obtained under the premise of creative work, and does not take off The equivalent or modification completed lower from spirit disclosed in this invention, both falls within the scope of protection of the invention.

Claims (21)

  1. A kind of 1. active multiband power line communication jamming equipment, it is characterised in that:The equipment includes power module, coupling electricity Road, power adaptive interference source module, impedance matching box and drive module;
    The function of described power module is to be converted into civilian civil power to be adapted to control below and electricity that signal link uses Press the alternating current that scope is 3~12V;
    The function of described termination power is barrier low frequency 220V voltage signals;
    The function of described power adaptive interference source module is to produce making an uproar for random signal according to power line channel condition, control The noise power of sound source and output adaptive;
    Wherein, according to power line channel condition, control produces the noise source of random signal and the noise power of output adaptive, tool Body is:Based on above-mentioned power adaptive interference source module and impedance matching box, embedded intelligence CPU module provides power line letter The signal intensity of different frequency range and the position in frequency band in road, and multiple signal generators and modulator are controlled accordingly, respectively Different capacity and the interference noise of frequency range occurs, and by different impedance matching units, noise signal is poured into power line In communication channel;
    The function of described impedance matching box is instant measurement time-variable impedance and the output impedance for matching interference source;
    Described drive module includes blower fan and fan drive circuit;Blower fan is under draught fan control circuit control, drive module energy Enough watt levels according to power adaptive interference source, the rotating speed of blower fan is adjusted, completes the radiating of equipment;
    Power module is powered for whole equipment, and drive module realizes the radiating of equipment;
    Middle whole signals of power line are adaptive by the high-frequency signal isolated feeding power by termination power, termination power first Source module should be disturbed, power adaptive interference source module, which produces, can be used in after the noise signal of interference, pass through impedance matching Device and termination power are sent into power line and realize Communication Jamming.
  2. A kind of 2. active multiband power line communication jamming equipment according to claim 1, it is characterised in that:Power supply mould Block includes power transformer, bridge rectifier, wave filter and voltage-stablizer;
    Power transformer is converted to 220V AC voltage in the alternating current of low pressure, and is provided with frequency following circuit;
    Positive and negative alternate sinusoidal voltage rectification is unidirectional pulsating volage by the bridge rectifier;
    The mains ripple part that the wave filter exports bridge rectifier carries out smooth;
    When the voltage-stablizer causes line voltage or load change, the voltage of output keeps stable.
  3. A kind of 3. active multiband power line communication jamming equipment according to claim 1, it is characterised in that:Coupling electricity Road includes high-pass filter and adjustable transformer;
    Described high-pass filter is made up of filter joint network, and it retains high-frequency signal the electric filter of 50Hz cities, is passed through Adjustable transformer, it is transmitted to follow-up impedance matching module and power adaptive interference source;
    Described adjustable transformer can nondestructively amplify high-frequency signal so that it can be identified by follow-up circuit.
  4. A kind of 4. active multiband power line communication jamming equipment according to claim 1, it is characterised in that:Described Power adaptive disturbs source module, is one or more sets.
  5. A kind of 5. active multiband power line communication jamming equipment according to claim 4, it is characterised in that:Often cover work( Rate adaptive disturbance source module includes circuitry for signal measurement, analog-to-digital conversion module, embedded intelligence CPU module, noise signal hair Raw device and modulator;
    Described circuitry for signal measurement receives the signal that termination power provides, and the voltage and current of signal is reasonably amplified, and And it is sent into analog-to-digital conversion module;
    Analog-to-digital conversion module is that the signal sampling that the high-frequency electrical line of force communicates quantifies to be sent into central computation unit;
    Described embedded intelligence CPU module carries out spectrum analysis to high-frequency signal, finds the frequency spectrum where signal of communication, and Estimate the energy of its communication;And frequency band and energy information according to where signal of communication, noise signal generator is controlled, receives noise Signal generator, the baseband noise of corresponding power is produced, then control modulator that baseband noise is modulated on frequency band.
  6. A kind of 6. active multiband power line communication jamming equipment according to claim 1, it is characterised in that:Described Impedance matching box is one or more sets.
  7. A kind of 7. active multiband power line communication jamming equipment according to claim 6, it is characterised in that:Often set resistance Anti- adaptation includes impedance measuring circuit, calculating control circuit and variable capacitance inductance network;
    Described impedance measuring circuit is an active electric network, and power line is regarded as into a broad sense resistance, adopted by circuit hardware Sample extracts phase and amplitude information;
    The calculating control circuit obtains the amplitude-phase information that impedance measurement network provides and is calculated and control rear class to hinder Inductance or capacity cell in anti-impedance matching box are matched;
    The variable capacitance inductance network is controlled by prime, and realizes inductance capacitance network is combined in circuit Match somebody with somebody.
  8. 8. a kind of active multiband power line communication interference method, it is characterised in that step is:
    1) user learns that user first sets this when there is an arrowband power line communications apparatus access electric transmission network in power line It is standby that electric transmission network is accessed by plug;
    Assuming that the arrowband power line communications apparatus working frequency is fsignal, its operating power is psignal, and the prior nothing of user Method learns two parameters;Separately the band signal X launched by transmitting equipment can remotely be received by setting receiving devicesignal, transmission Line power frequency is f50
    2) by electric power source pair of module, the communication equipment is powered, and is specially:
    2.1 utilize the power transformer of power module, and 220V civil powers are converted into low-voltage AC;
    2.2 utilize the bridge rectifier of power module, and low-voltage AC is rectified into approximate DC electricity;
    2.3 utilize the wave filter of power module, and smooth, elimination HFS is carried out for the direct currents of foregoing 2.2 generations;
    2.4 utilize the voltage-stablizer of power module, and voltage stabilizing is carried out to direct current;
    3) communication equipment disturbs the cooperating of source module by termination power and power adaptive, realizes to electric power in circuit The analysis of line communication channel and signal, it is specially:
    Frequency is f by high-pass filter in 3.1 termination powers50The electric filter of low frequency city, by the band signal of power line communication XsignalRetention, through the adjustable transformer in overcoupled circuits, is transmitted to follow-up power adaptive interference source and impedance matching box; The signal actually retained is X 'signal+N,X′signalFor the signal after distortion, N is noise;
    Circuitry for signal measurement, analog to digital conversion circuit and the embedded intelligence CPU module of 3.2 power adaptives interference source module will be right Entered filtering acquisition signal at 3.1 to be calculated, analyzed;The high-frequency signal for first being sent out termination power by circuitry for signal measurement It is amplified and is sent into analog to digital conversion circuit;Analog to digital conversion circuit is with often higher with frequency range than relative arrowband power line communication Sample rate is sampled and quantified to signal;Then with autocorrelation method by noise signal is gone as caused by this equipment in circuit Remove;By above-mentioned steps, X ' is obtainedsignal+ N sampling X 'signal(n)+N (n), analog to digital conversion circuit is by after sample quantization Above-mentioned signal is sent into embedded intelligence CPU module;
    3.3 disturb the embedded intelligence CPU module in source module to signal X using power adaptivesignalSpecific frequency range and energy Amount is estimated;The signal that embedded intelligence CPU module obtains first carries out transform domain operation, obtains its power spectrum characteristicThen the fuzzy algorithmic approach according to power line channel feature is used, estimates primary signal Xsignal The lower bound of the frequency range at placeAnd the upper boundSo that confidence level of the signal in the range of bound is 95%; Then calculate the general power of the signal obtained after coupling
    3.4 withEstimate general power in the channelAnd it is stored in embedded intelligence CPU moulds In block;
    4) communication equipment disturbs the cooperating of source module and impedance matching box by power adaptive, realizes interference signal Pouring into for generation, modulation, and interference signal, it is specially:
    4.1 have estimated power line communication band information in arrowband to be disturbed by embedded intelligence CPU module And power informationAfter signal to noise ratio snr=1/r of setting interference, show that required jamming power isThe embedded intelligence CPU of source module can be then disturbed by power adaptive Module controls noise signal generator to produce powerNoise signal;
    Noise signal in 4.1 using the modulator in power adaptive interference source module, is modulated to lower bound by 4.2With The upper boundCentre;
    4.3 using the impedance matching box in power adaptive interference source module, and combines the calculating of embedded intelligence CPU module Ability, the matching of output impedance is carried out, and then the power of noise source is exported into power line;
    5) communication equipment realizes the radiating of equipment by drive module, is specially:
    The voltage and current that fan drive circuit in 5.1 drive modules is exported by monitoring power module, monitors the communication and sets Standby overall power;
    5.2 after the equipment monitored in 5.1 reaches the threshold value of setting, and the blower fan in fan drive circuit driving drive module enters Row work, start active heat removal.
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CN106160794B (en) * 2015-04-02 2018-09-04 光寿科技有限公司 power line communication control system
CN106849999A (en) * 2015-12-04 2017-06-13 广东广联电子科技有限公司 A kind of carrier telecommunication
CN107769886B (en) * 2016-08-16 2020-02-14 大唐移动通信设备有限公司 Signal interference device and method
CN108345242A (en) * 2018-01-12 2018-07-31 杭州海兴电力科技股份有限公司 Ripple control receiving circuit and remote-control system
CN109495136A (en) * 2018-12-29 2019-03-19 重庆邮电大学 A kind of vehicle mounted electric line of force communication Adaptive impedance matching method
CN110808761A (en) * 2019-10-21 2020-02-18 中科可来博(固安)航天电器制造有限公司 Method for tampering stealing information on power line and preventing interference
CN111030730A (en) * 2019-12-05 2020-04-17 国网天津市电力公司电力科学研究院 Low-voltage power line noise recording and injecting system
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