CN110224722A - A kind of plc communication blocking equipment and method - Google Patents
A kind of plc communication blocking equipment and method Download PDFInfo
- Publication number
- CN110224722A CN110224722A CN201910623041.9A CN201910623041A CN110224722A CN 110224722 A CN110224722 A CN 110224722A CN 201910623041 A CN201910623041 A CN 201910623041A CN 110224722 A CN110224722 A CN 110224722A
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- signal
- frequency
- pseudo
- access
- random sequence
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- 238000004891 communication Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000000903 blocking effect Effects 0.000 title claims abstract description 13
- 150000001875 compounds Chemical group 0.000 claims abstract description 9
- 238000001914 filtration Methods 0.000 claims abstract description 3
- 238000013528 artificial neural network Methods 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 4
- 238000012549 training Methods 0.000 claims description 3
- 230000005670 electromagnetic radiation Effects 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 230000010365 information processing Effects 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract description 2
- 230000005855 radiation Effects 0.000 abstract description 2
- 238000013473 artificial intelligence Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
- H04L27/12—Modulator circuits; Transmitter circuits
- H04L27/122—Modulator circuits; Transmitter circuits using digital generation of carrier signals
Abstract
The present invention provides a kind of plc communication blocking equipment and methods, prevent power communication from preventing electromagnetic conductive radiation leaks useful information using electronic countermeasure principle using information relevant way；The designs such as the filtering of use, other compound signals inhibit signal strength, have good Electro Magnetic Compatibility；Can be for the anti-frequency point divulged a secret of emphasis to be wanted, progress pseudo-random sequence is compound, enhances protection effect.Meanwhile it is small in size, installation easy to carry has a wide range of application, and anti-steal secret information of power supply that can be used in information processing equipment is divulged a secret in the multi-field transmission signal such as place, such as computer, printer, duplicator with electromagnetic radiation；It can also carry out stealing the close behavior progress effective protection divulged a secret and divulged a secret by electromagnetic radiation by power line conduction as covert communications heart channel using power line carrier communication to possible.
Description
Technical field
The invention belongs to power information field, in particular to a kind of plc communication blocking equipment and method.
Background technique
Power line is a kind of most wide material resources medium of current most common, covering surface, and electric line carrier communication is in power line
On the basis of, using power network as channel, realize data transmitting and information exchange.The transmission matchmaker of power line carrier signal the most
It is situated between, is the wired communication mode defended clothing and do not need track investment.The technology starts to be applied to furniture automation.Remote meter reading, width
The fields such as band online.A piece power line is equivalent to a data line.If power line carrier, PLC channel is not to build known to us
As soon as vertical convert channel, then the information security of all data of these equipment rooms processing can be protected without secret, this is by band
Carry out great security risk.
Summary of the invention
In order to solve the problems, such as that existing electric line carrier communication technology has easily leakage, it is logical that the present invention provides a kind of PLC
Believe blocking equipment, including shell, signal interrupter, the signal interrupter is fixedly mounted inside the housing, and the side of shell is set
It is equipped with multiple groups USB interface；Signal interrupter successively includes that clock source, frequency modulation separator, whole wave controller, pseudo-random sequence are compound
Device, signal modulator, signal output port, and be successively electrically connected.
As an improvement, frequency modulation separator is provided with filter unit, the wave signal for issuing clock source is carried out by frequency
It is divided into different signal paths；The frequency of same signal path is identical, and the difference of the frequency of adjacent signals access is 5~10Hz.
As an improvement, whole wave controller successively includes frequency modulation unit, amplitude adjustment unit, algorithm superpositing unit, number
It analog-converted unit and is electrically connected in order；D/A conversion unit signal output port is electrically connected pseudorandom sequence
Column recombiner signal input port, pseudo-random sequence recombiner signal output port are electrically connected signal modulator input port；
Signal modulator input port signal is electrically connected signal output port.
As an improvement, pseudo-random sequence recombiner is for issuing pseudo-random sequence；Signal modulator is used for pseudorandom sequence
Column and the signal of D/A conversion unit output carry out complex modulated；Signal output port is for adding the signal of complex modulated
It is loaded at device to be encrypted.
As an improvement, the shell is rack shell or desktop computer shell.
Meanwhile additionally providing a kind of disabling signal method using above equipment, specific steps are as follows: (one) generate signal:
The signal of multiple groups different frequency is exported by clock source；(2) separation and marking signal: signal enters frequency modulation separator, isolates
The signal path of multiple groups different frequency, is marked as access 1, access 2, access 3 ... access N, N are positive integer, same logical
The frequency of road signal is identical, and the difference of the frequency of adjacent number access is 5~10Hz；(3) whole wave: one is connected in each access
An individual whole wave access in whole wave controller successively carries out frequency modulation, amplitude adjustment, superposition algorithm, number in whole wave access
Analog converting, output signal；(4) compound pseudo-random sequence: pseudo-random sequence is generated by pseudo-random sequence recombiner, in advance
Pseudo-random sequence complex modulated is a signal in set specific frequency signal by the signal for setting one group of specific frequency；(5) it integrates
Signal and output: signal in step (4) being handled by signal modulator, is exported through signal output port, is electrically connected
At to device to be encrypted.
As an improvement, setting is all different every time when set specific frequency signal is set in step (4), it is set as at random
Any one group in access.
As an improvement, the method that set specific frequency signal setting uses artificial intelligence neural networks in step (4), specific to wrap
It includes:
(1) sample of signal for setting multiple groups fixed frequency constitutes neural network based on the frequency of sample, phase；
(2) it is input in neural network using the signal message that different address, period transmit, the training neural network,
Realize that the set specific frequency signal that any address, time are sent out is random and orderly.
The utility model has the advantages that a kind of plc communication blocking equipment provided by the invention and method, prevent electricity using information relevant way
Power communication, using electronic countermeasure principle, prevents electromagnetic conductive radiation leaks useful information；The filtering of use, other compound signals
Etc. designs inhibit signal strength, have good Electro Magnetic Compatibility；Can for the anti-frequency point divulged a secret of emphasis is wanted, carry out it is pseudo- with
Machine sequence is compound, enhances protection effect.Meanwhile it is small in size, installation easy to carry has a wide range of application, can be used in information processing
The power supply of equipment is anti-to steal secret information and electromagnetic radiation is divulged a secret the multi-field transmission such as place, such as computer, printer, duplicator
In signal；Can also to it is possible steal as covert communications heart channel using power line carrier communication close divulge a secret and pass through
Electromagnetic radiation carries out effective protection by the behavior that power line conduction is divulged a secret.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And can be implemented in accordance with the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention and the accompanying drawings.
Detailed description of the invention
Fig. 1 is the major part flowage structure schematic diagram of present device.
In attached drawing: 1, clock source；2, frequency modulation separator；3, whole wave controller；4, pseudo-random sequence recombiner；5, signal tune
Device processed；6, signal output port.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Implement below
Example is not intended to limit the scope of the invention for illustrating the present invention.
A kind of plc communication blocking equipment, including shell, signal interrupter, the signal interrupter are fixedly mounted on shell
Inside, the side of shell are provided with multiple groups USB interface；Signal interrupter successively includes clock source 1, frequency modulation separator 2, whole wave control
Device 3 processed, pseudo-random sequence recombiner 4, signal modulator 5, signal output port 6, and be successively electrically connected.Frequency modulation separator 2
It is provided with filter unit, the wave signal for issuing clock source 1 carries out being divided into different signal paths by frequency；Same signal
The frequency of access is identical, and the difference of the frequency of adjacent signals access is 5~10Hz.
Whole wave controller 3 successively includes frequency modulation unit 31, amplitude adjustment unit 32, algorithm superpositing unit 33, digital mould
Intend converting unit 34 and is electrically connected in order；34 signal output port of D/A conversion unit is electrically connected pseudorandom
4 signal input port of sequence recombiner, 4 signal output port of pseudo-random sequence recombiner are electrically connected signal modulator 5 and input
Port；5 input port signal of signal modulator is electrically connected signal output port 6.
Pseudo-random sequence recombiner 4 is for issuing pseudo-random sequence；Signal modulator 5 is used for pseudo-random sequence and number
The signal that analog-converted unit 34 exports carries out complex modulated；Signal output port 6 is for existing the signal loading of complex modulated
At device to be encrypted.Shell is rack shell or desktop computer shell.
Meanwhile additionally providing a kind of disabling signal method using above equipment, specific steps are as follows: (one) generate signal:
The signal of multiple groups different frequency is exported by clock source 1；(2) separation and marking signal: signal enters frequency modulation separator 2, separation
The signal path of multiple groups different frequency out, is marked as access 1, access 2, access 3 ... access N, N are positive integer, same
The frequency of path signal is identical, and the difference of the frequency of adjacent number access is 5~10Hz；(3) whole wave: one is connected in each access
An individual whole wave access in a whole wave controller 3 successively carries out frequency modulation, amplitude adjustment, superposition algorithm, number in whole wave access
Word analog converting, output signal；(4) compound pseudo-random sequence: pseudo-random sequence is generated by pseudo-random sequence recombiner 4, in advance
Pseudo-random sequence complex modulated is a signal in set specific frequency signal by the signal for first setting one group of specific frequency；(5) whole
It closes signal and output: signal in step (4) being handled by signal modulator 5, is exported through signal output port 6, electrically
It is connected at device to be encrypted.
When set specific frequency signal is set in step (4), setting is all different every time, is set as appointing in access at random
It anticipates one group.The method that set specific frequency signal setting uses artificial intelligence neural networks in step (4), specifically includes:
(1) sample of signal for setting multiple groups fixed frequency constitutes neural network based on the frequency of sample, phase；
(2) it is input in neural network using the signal message that different address, period transmit, the training neural network,
Realize that the set specific frequency signal that any address, time are sent out is random and orderly.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (8)
1. a kind of plc communication blocking equipment, it is characterised in that: including shell, signal interrupter, the fixed peace of the signal interrupter
Cased portion, the side of shell are provided with multiple groups USB interface；Signal interrupter successively includes clock source (1), frequency modulation separation
Device (2), whole wave controller (3), pseudo-random sequence recombiner (4), signal modulator (5), signal output port (6), and successively
It is electrically connected.
2. plc communication blocking equipment according to claim 1, it is characterised in that: it is single that frequency modulation separator (2) is provided with filtering
Member, for carrying out the wave signal that clock source (1) issues to be divided into different signal paths by frequency；The frequency of same signal path
Identical, the difference of the frequency of adjacent signals access is 5~10Hz.
3. plc communication blocking equipment according to claim 1, it is characterised in that: whole wave controller (3) successively includes to adjust
It frequency unit (31), amplitude adjustment unit (32), algorithm superpositing unit (33), D/A conversion unit (34) and carries out in order
It is electrically connected；D/A conversion unit (34) signal output port is electrically connected the input of pseudo-random sequence recombiner (4) signal
Port, pseudo-random sequence recombiner (4) signal output port are electrically connected signal modulator (5) input port；Signal modulator
(5) input port signal is electrically connected signal output port (6).
4. plc communication blocking equipment according to claim 1, it is characterised in that: pseudo-random sequence recombiner (4) is for sending out
Pseudo-random sequence out；Signal modulator (5) be used for by pseudo-random sequence and D/A conversion unit (34) output signal into
Row complex modulated；Signal output port (6) is used for the signal loading of complex modulated at device to be encrypted.
5. plc communication blocking equipment according to claim 1, it is characterised in that: the shell is rack shell or platform
Formula machine shell.
6. a kind of disabling signal method using according to claim 1-5 any plc communication blocking equipments, feature exist
In: the signal of multiple groups different frequency specific steps are as follows: (one) generate signal: is exported by clock source (1)；(2) it separates and marks
Signal: signal enters frequency modulation separator (2), isolates the signal path of multiple groups different frequency, is marked as access 1, access
2, access 3 ... access N, N are positive integer, and the frequency of same path signal is identical, the difference of the frequency of adjacent number access is 5~
10Hz；(3) whole wave: an individual whole wave access in a whole wave controller (3) is connected in each access, in whole wave access
Successively carry out frequency modulation, amplitude adjustment, superposition algorithm, digitaltoanalogconversion, output signal；(4) compound pseudo-random sequence: pass through
Pseudo-random sequence recombiner (4) generates pseudo-random sequence, presets the signal of one group of specific frequency, and pseudo-random sequence is compound
It is modulated in set specific frequency signal as a signal；(5) signal in step (4) integrated signal and output: is passed through into signal modulation
Device (5) is handled, and is exported, is electrically connected at device to be encrypted through signal output port (6).
7. disabling signal method according to claim 6, it is characterised in that: set specific frequency signal is set in step (4)
Periodically, setting is all different every time, is set as in access any one group at random.
8. disabling signal method according to claim 6, it is characterised in that: set specific frequency signal setting is adopted in step (4)
The manually method of intelligent Neural Network, specifically includes:
(1) sample of signal for setting multiple groups fixed frequency constitutes neural network based on the frequency of sample, phase；
(2) it is input in neural network using the signal message that different address, period transmit, the training neural network is realized
The set specific frequency signal that any address, time send out is random and orderly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910623041.9A CN110224722B (en) | 2019-07-11 | 2019-07-11 | PLC communication blocking device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910623041.9A CN110224722B (en) | 2019-07-11 | 2019-07-11 | PLC communication blocking device and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110224722A true CN110224722A (en) | 2019-09-10 |
| CN110224722B CN110224722B (en) | 2024-04-12 |
Family
ID=67813096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910623041.9A Active CN110224722B (en) | 2019-07-11 | 2019-07-11 | PLC communication blocking device and method |
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| Country | Link |
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| CN (1) | CN110224722B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110557172A (en) * | 2019-09-27 | 2019-12-10 | 南京同科科技发展有限公司 | Power line information anti-theft secret equipment |
| CN112152671A (en) * | 2020-10-29 | 2020-12-29 | 国网江西省电力有限公司经济技术研究院 | MIMO power line carrier communication method and system |
| CN113055053A (en) * | 2021-03-31 | 2021-06-29 | 成都立鑫新技术科技有限公司 | Power line carrier communication blocking equipment for preventing secret leakage |
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| SU1840117A1 (en) * | 1979-10-08 | 2006-06-27 | Воронежский НИИ связи | Digital data transmitting and receiving unit |
| CN1041654A (en) * | 1988-10-06 | 1990-04-25 | 日本钢管株式会社 | Distance-finding method and device |
| CN1147883A (en) * | 1995-02-01 | 1997-04-16 | 菲利浦电子有限公司 | Method of error protected transmission, method of error protected reception of data and transmission system for transmission of data |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110557172A (en) * | 2019-09-27 | 2019-12-10 | 南京同科科技发展有限公司 | Power line information anti-theft secret equipment |
| CN112152671A (en) * | 2020-10-29 | 2020-12-29 | 国网江西省电力有限公司经济技术研究院 | MIMO power line carrier communication method and system |
| CN112152671B (en) * | 2020-10-29 | 2021-09-28 | 国网江西省电力有限公司经济技术研究院 | MIMO power line carrier communication method and system |
| CN113055053A (en) * | 2021-03-31 | 2021-06-29 | 成都立鑫新技术科技有限公司 | Power line carrier communication blocking equipment for preventing secret leakage |
| CN113055053B (en) * | 2021-03-31 | 2022-09-16 | 成都立鑫新技术科技有限公司 | Power line carrier communication blocking equipment for preventing secret leakage |
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| Publication number | Publication date |
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| CN110224722B (en) | 2024-04-12 |
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