CN110519662A - A kind of electric power signal monitoring device and system is monitored without new line leakage of information - Google Patents
A kind of electric power signal monitoring device and system is monitored without new line leakage of information Download PDFInfo
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- CN110519662A CN110519662A CN201910911948.5A CN201910911948A CN110519662A CN 110519662 A CN110519662 A CN 110519662A CN 201910911948 A CN201910911948 A CN 201910911948A CN 110519662 A CN110519662 A CN 110519662A
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- 238000012360 testing method Methods 0.000 claims abstract description 49
- 230000008054 signal transmission Effects 0.000 claims abstract description 24
- 238000004891 communication Methods 0.000 claims abstract description 23
- 238000012545 processing Methods 0.000 claims abstract description 19
- 230000008878 coupling Effects 0.000 claims description 22
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C19/00—Electric signal transmission systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2209/00—Arrangements in telecontrol or telemetry systems
- H04Q2209/30—Arrangements in telecontrol or telemetry systems using a wired architecture
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Abstract
System is monitored the present invention relates to a kind of electric power signal monitoring device and without new line leakage of information, the electric power signal monitoring device includes signal acquisition interface, signal extracting circuit, capture card and signal transmission interface；The signal acquisition interface is connected to signal extracting circuit, and the signal extracting circuit is connected to capture card, and the capture card is connected to external processing equipment by signal transmission interface；The signal acquisition interface is for connecting test line；The signal extracting circuit is used to extract the electric power signal on test line by signal acquisition interface；The capture card is for being sent to external processing equipment by signal transmission interface after the electric power signal that signal extracting circuit acquires is handled, decomposed and demodulated.It can find that there are improper datas to transmit in old route in time by power information monitoring device, prevent from without new line communication module attacking network due to presetting in a device, destroying and the behavior of information stealth, provide help for network security.
Description
Technical field
The present invention relates to leakage of information monitoring technical field, in particular to a kind of electric power signal monitoring device and without new line believe
Cease leakage monitoring system.
Background technique
With the extensive application of computer and smart machine, communication becomes the important bridge for connecting various equipment.And without new
Line communication is to utilize existing well laid network of wires (380/220V), cable, Cabie line transmission voice or transmission data
A kind of specific communication mode, and should not network layout.And the device fabrication chamber of commerce of some " unique " utilizes this safety leakage
Hole, in a device preset no new line communication module are attacked network, are destroyed and information stealth, and this cause network
The approach of information-leakage is usually easy to be ignored.
Summary of the invention
For this reason, it may be necessary to provide a kind of electric power signal monitoring device and monitor system without new line leakage of information, solve existing logical
It crosses in the behavior of already present old line transmission information, causes leakage of information or important information equipment to meet with there are improper communication
The problem of pre-buried information bomb attacks.
To achieve the above object, a kind of electric power signal monitoring device, including signal acquisition interface, signal are inventor provided
Extract circuit, capture card and signal transmission interface；
The signal acquisition interface is connected to signal extracting circuit, and the signal extracting circuit is connected to capture card, described
Capture card is connected to external processing equipment by signal transmission interface；
The signal acquisition interface is for connecting test line；
The signal extracting circuit is used to extract the electric power signal on test line by signal acquisition interface；
The capture card is for passing through letter after the electric power signal that signal extracting circuit acquires is handled, decomposed and demodulated
Number coffret is sent to external processing equipment.
It advanced optimizes, the signal acquisition interface includes power line interface, cable interface and Cabie interface.
It advanced optimizes, the signal extracting circuit includes coupling circuit, and the coupling circuit are for extracting test line
On high-frequency carrier signal, and prevent electric current present on test line.
It advanced optimizes, further includes attenuator circuit, the attenuator circuit extracts circuit acquisition for adjustment signal
The size of electric power signal.
It advanced optimizes, further includes CPU, the attenuator circuit further includes pad value selection switch, the pad value choosing
The control terminal for selecting switch is connected to CPU, and the CPU is used to select the pad value of switch selection attenuator circuit by pad value.
It advanced optimizes, also further includes CPU and channel selection switch, the signal acquisition interface passes through channel selection switch
It is connected to signal extracting circuit, the CPU connects for control channel selection switch selection data processing circuit connection signal acquisition
Mouthful.
It advanced optimizes, further includes signal lamp, the signal lamp is connected to CPU, and the CPU will be for that will control
The selection result of signal selecting switch or pad value selection switch is shown by signal lamp.
It advanced optimizes, the signal transmission interface is USB interface.
Inventor additionally provides another technical solution: a kind of no new line leakage of information monitoring system, including electric power signal
Monitoring device and data processor；
The electric power signal monitoring device includes that signal acquisition interface, signal extracting circuit, capture card and signal transmission connect
Mouthful；The signal acquisition interface is connected to signal extracting circuit, and the signal extracting circuit is connected to capture card, the capture card
Data processor is connected to by signal transmission interface；
The signal acquisition interface is for connecting test line；
The signal extracting circuit is used to extract the electric power signal on test line by signal acquisition interface；
The capture card is for passing through letter after the electric power signal that signal extracting circuit acquires is handled, decomposed and demodulated
Number coffret is sent to data processor；
The data processor is used to be carried out according to the electric power signal of acquisition on judgement test line with the presence or absence of communication letter
Number characteristic value, signal of communication characteristic value, then issue alarm signal if it exists.
It advanced optimizes, the data processor is also used to for received electric power signal data being stored in database, and reads
The electric power signal data in database are taken to generate waveform patterns according to reference axis parameter.
It is different from the prior art, above-mentioned technical proposal, connected with test line by power information monitoring device
It connects, real-time monitoring is carried out to old route, obtains the electric power signal on test line, and handle the electric power signal of acquisition
After analysis, it is sent to extraneous processing equipment, can find that there are improper datas to transmit in old route in time, and immediately
Alarm effectively prevent without new line communication module attacking network due to presetting in a device, destroying and the row of information stealth
To provide help safely for user network.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of electric power signal monitoring device described in specific embodiment；
Fig. 2 is a kind of circuit diagram schematic diagram of capture card described in specific embodiment；
Fig. 3 is a kind of circuit diagram of coupling circuit described in specific embodiment；
Fig. 4 is a kind of circuit diagram of attenuator circuit described in specific embodiment
Fig. 5 is a kind of circuit diagram of CPU described in specific embodiment
Fig. 6 is a kind of circuit diagram of signal lamp described in specific embodiment
Fig. 7 is a kind of structural schematic diagram for monitoring system described in specific embodiment without new line leakage of information；
Fig. 8 is that data processor described in specific embodiment illustrates a kind of process that electric power signal data are stored in data
Figure,
Fig. 9 is a kind of flow diagram that data processor described in specific embodiment understands database caches data,
Figure 10 is a kind of flow diagram that data processor described in specific embodiment generates display image,
Figure 11 is a kind of flow diagram that data processor described in specific embodiment judges line status.
Description of symbols:
110, electric power signal monitoring device,
111, capture card,
112, coupling circuit,
113, attenuator circuit,
114, signal transmission interface,
115, CPU,
116, signal lamp,
117, power line interface,
118, cable interface,
119, Cabie route,
120, data processor.
Specific embodiment
Technology contents, construction feature, the objects and the effects for detailed description technical solution, below in conjunction with specific reality
It applies example and attached drawing is cooperated to be explained in detail.
Referring to Fig. 1, a kind of power information monitoring device 110 is present embodiments provided, it can be to the electric power networks of secrecy
Real-time monitoring is carried out, also can be applied to the real-time monitoring of other network lines, including signal acquisition interface, signal extraction electricity
Road, capture card 111 and signal transmission interface 114；The signal acquisition interface is connected to signal extracting circuit, the signal extraction
Circuit connection is connected to extraneous processing equipment by signal transmission interface 114 in capture card 111, the capture card 111；
The signal acquisition interface is for connecting test line；
The signal extracting circuit is used to extract the electric power signal on test line by signal acquisition interface；
The capture card 111 after the electric power signal that signal extracting circuit acquires is handled, decomposed and demodulated for leading to
It crosses signal transmission interface 114 and is sent to extraneous processing equipment；
It is monitored by the route of electric power signal monitoring device 110 pairs of equipment of mouth, the signal acquisition of electric power signal device
Interface is connected to test line in equipment, such as network of wires route, cable and Cabie route 119, wherein signal acquisition interface
Including power line interface 117, cable interface 118 and Cabie interface, test line is connected to by power line interface 117 respectively
In network of wires route, cable interface 118 is connected to the cable in test line, and 119 interface of Cabie route is connected to tested
Cabie route 119 in route, after the signal acquisition interface of electric power signal device is connected to test line, signal extraction electricity
Road extract to the electric power signal in test line, when signal extracting circuit extracts the electric power signal in test line
Afterwards, it is input to the data input port of capture card 111, the processing, analysis and demodulation to electric power signal are completed by capture card 111
Afterwards, then by signal transmission interface 114 it is transmitted to extraneous processing equipment, is carried out by extraneous processing equipment to electric power signal is received
Judge with the presence or absence of signal of communication characteristic value in test line, if judging to sentence in test line containing signal of communication characteristic value
Disconnected test line is there are leakage of information or is attacked, then extraneous processing equipment issues alarm signal, carries out warning reminding.Pass through
Comprehensive monitoring information processing equipment is by the behavior of already present old line transmission information, once discovery is deposited on test line
In data transmission, then alarms immediately, can find the improper communication in test line in time, prevent the leakage of information privacy
Or important information equipment suffers the attack of pre-buried information bomb, provides help for network security.
Referring to Fig. 2, the core of electric power signal monitoring device mouth 110 is capture card 111, capture card 111 in the present embodiment
Using the multifunctional data acquisition card 111 that can acquire 1KHz-100MHz, enumerate the communication of current technology all frequency ranges and
Frequency point, capture card 111 use USB high-speed data acquisition card 111, are realized by signal transmission interface 114 using USB2.0 interface
With 120 information exchange of data processor, parameter are as follows: highest sample rate is 100MSa/s, and sampling channel is that mono-/bis-channel (can
To pass through software control), sampling resolution 8bit, sampling depth is 2MB (being 1MB/CH when binary channels), input impedance 50
Ω, input amplitude are ± 2.5V, and maximum input amplitude deviation ± 10%, maximum input direct-current offset is ± 10LSB, analog bandwidth
For DC-10MHz, full duplex RS232 serial ports, maximum stand-by power consumption≤280mA, maximum functional power consumption≤500mA, triggering side are carried
Formula includes external trigger and channel triggering, and external trigger may be configured as edging trigger and level triggers, and settable touching is triggered in channel
Channel, threshold and edge type are sent out, external trigger input impedance is 10k Ω, and external trigger incoming level is 3.3V LVTTL, most
Big analog channel input voltage is ± 5V, and it is ± 5V that maximum, which triggers sensible input voltage,.Wherein, capture card 111 will realize communication
Also need to increase peripheral circuit, such as coupling circuit 112, attenuator circuit 113.
Fig. 3 and Fig. 5 is please referred to, the signal extracting circuit includes coupling circuit 112, and the coupling circuit 112 are for mentioning
The high-frequency carrier signal on test line is taken, and prevents electric current present on test line.Signal extracting circuit is using coupling electricity
Input channel of the road 112 as signal selects extraction signal on old route and interface signal by coupling circuit 112, coupling
It closes circuit 112 and extracts high-frequency carrier signal on old route, in order to which capture card 111 is demodulated, while can prevent old
Route in electric current that may be present enter electric power signal monitoring device mouth 110.While in order to realize the selection to interface signal
Function, electric power signal monitoring device mouth 110 further include CPU115 and channel selection switch, and the signal acquisition interface passes through channel
Selection switch is connected to signal extracting circuit, and the CPU115 is for control channel selection switch selection data processing circuit connection
Signal acquisition interface.CPU115 can control channel selection switch and carry out the signal acquisition that selection coupling circuit 112 connect simultaneously
The type of interface.
Fig. 4 and Fig. 5 is please referred to, the electric power signal monitoring device mouth 110 further includes attenuator circuit 113, the decaying
Device circuit 113 extracts the size of the electric power signal of circuit acquisition for adjustment signal.The main application of attenuator circuit 113 are as follows:
The size of signal in adjustment circuit can be used to the pad value of direct-reading tested network route, simultaneously in comparative method for measuring circuit
Impedance matching can be improved, it, can be in this circuit and reality if certain circuit requirements have a more stable load impedance
It is inserted into an attenuator between load impedance, the variation of impedance can be buffered.The attenuator circuit 113 further includes pad value choosing
Switch is selected, the control terminal of the pad value selection switch is connected to CPU115, and the CPU115 is used to open by pad value selection
Close the pad value of selection attenuator circuit 113.Wherein pad value includes 0dBm or 10dBm, and CPU115 can control attenuator electricity
The pad value of pad value selection switch selection 0dBm or 10dBm in road 113.
Referring to Fig. 6, in the present embodiment, the signal monitoring device further includes signal lamp 116, the signal refers to
Show that lamp 116 is connected to CPU115, the CPU115 is used to control the selection knot of signal selecting switch or pad value selection switch
Fruit is shown by signal lamp 116.CPU115 can be according to the type for the signal acquisition interface that selection coupling circuit 112 connect
Or the pad value of attenuator circuit 113 carries out control signal lamp 116, wherein cable interface 118 is referred to using red signal
Show that lamp 116 is shown, power line interface 117 shows that Cabie line interface uses the letter of blue using the signal lamp 116 of green
Number indicator light 116 is shown.
Referring to Fig. 7, a kind of no new line leakage of information monitoring system is present embodiments provided, it can be to the power network of secrecy
Network carries out real-time monitoring, also can be applied to the real-time monitoring of other network lines, including electric power signal monitoring device mouth 110 and
Data processor 120；Wherein data processor 120 can be the equipment such as laptop, personal computer, special purpose computer.
The electric power signal monitoring device mouth 110 includes signal acquisition interface, signal extracting circuit, capture card 111 and letter
Number coffret 114；The signal acquisition interface is connected to signal extracting circuit, and the signal extracting circuit is connected to capture card
111, the capture card 111 is connected to data processor 120 by signal transmission interface 114；
The signal acquisition interface is for connecting test line；
The signal extracting circuit is used to extract the electric power signal on test line by signal acquisition interface；
The capture card 111 after the electric power signal that signal extracting circuit acquires is handled, decomposed and demodulated for leading to
It crosses signal transmission interface 114 and is sent to data processor 120；
The data processor 120 is used to be carried out according to the electric power signal of acquisition on judgement test line with the presence or absence of communication
Signal characteristic value, signal of communication characteristic value, then issue alarm signal if it exists.
It is monitored by the route of electric power signal monitoring device 110 pairs of equipment of mouth, the signal acquisition of electric power signal device
Interface is connected to test line in equipment, such as network of wires route, cable and Cabie route 119, wherein signal acquisition interface
Including power line interface 117, cable interface 118 and Cabie interface, test line is connected to by power line interface 117 respectively
In network of wires route, cable interface 118 is connected to the cable in test line, and 119 interface of Cabie route is connected to tested
Cabie route 119 in route, after the signal acquisition interface of electric power signal device is connected to test line, signal extraction electricity
Road extract to the electric power signal in test line, when signal extracting circuit extracts the electric power signal in test line
Afterwards, it is input to the data input port of capture card 111, the processing, analysis and demodulation to electric power signal are completed by capture card 111
Afterwards, then by signal transmission interface 114 it is transmitted to data processor 120, when data processor 120 is carried out to electric power signal is received
Judge with the presence or absence of signal of communication characteristic value in test line, if judging to sentence in test line containing signal of communication characteristic value
Disconnected test line is there are leakage of information or is attacked, then data processor 120 issues alarm signal, carries out warning reminding.It is logical
Comprehensive monitoring information processing equipment is crossed by the behavior of already present old line transmission information, once discovery is on test line
It there are when data transmission, then alarms immediately, can find the improper communication in test line in time, prevent letting out for information privacy
Leakage or important information equipment suffer the attack of pre-buried information bomb, provide help for network security.
In the present embodiment, the core of electric power signal monitoring device mouth 110 is capture card 111, and capture card 111 is using can adopt
The multifunctional data acquisition card 111 for collecting 1KHz-100MHz, enumerates all frequency ranges and frequency point of the communication of current technology, acquires
Card 111 uses USB high-speed data acquisition card 111, by signal transmission interface 114 using the realization of USB2.0 interface and data processing
120 information exchange of device, parameter are as follows: highest sample rate is 100MSa/s, and sampling channel is that mono-/bis-channel (can pass through software
Control), sampling resolution 8bit, sampling depth is 2MB (being 1MB/CH when binary channels), and input impedance is 50 Ω, inputs amplitude
For ± 2.5V, maximum input amplitude deviation ± 10%, maximum input direct-current offset is ± 10LSB, analog bandwidth DC-10MHz,
Included full duplex RS232 serial ports, maximum stand-by power consumption≤280mA, maximum functional power consumption≤500mA, triggering mode include outside
Triggering and channel triggering, external trigger may be configured as edging trigger and level triggers, and settable trigger port, threshold are triggered in channel
And edge type, external trigger input impedance are 10k Ω, external trigger incoming level is 3.3V LVTTL, maximum analog channel
Input voltage is ± 5V, and it is ± 5V that maximum, which triggers sensible input voltage,.Wherein, capture card 111 will realize that communication also needs to increase
Peripheral circuit, such as coupling circuit 112, attenuator circuit 113.
The signal extracting circuit includes coupling circuit 112, and the coupling circuit 112 are used to extract the height on test line
Frequency carrier signal, and prevent electric current present on test line.Signal extracting circuit is using coupling circuit 112 as the defeated of signal
Enter channel, by coupling circuit 112 to signal and interface signal selection is extracted on old route, coupling circuit 112 are in old line
High-frequency carrier signal is extracted in road, in order to which capture card 111 is demodulated, while can prevent that may be present in old route
Electric current enters electric power signal monitoring device mouth 110.Simultaneously in order to realize the selection function to interface signal, electric power signal monitors dress
Setting mouth 110 further includes CPU115 and channel selection switch, and the signal acquisition interface is connected to signal by channel selection switch
Circuit is extracted, the CPU115 is for control channel selection switch selection data processing circuit connection signal acquisition interface.Simultaneously
CPU115 can control the type that channel selection switch carries out the signal acquisition interface that selection coupling circuit 112 connect.
The electric power signal monitoring device mouth 110 further includes attenuator circuit 113, and the attenuator circuit 113 is for adjusting
Entire signal extracts the size of the electric power signal of circuit acquisition.The main application of attenuator circuit 113 are as follows: signal in adjustment circuit
Size can be used to the pad value of direct-reading tested network route, while can improve impedance in comparative method for measuring circuit
Match, it, can interleaving in this circuit and actual loading impedance if certain circuit requirements have a more stable load impedance
Enter an attenuator, the variation of impedance can be buffered.The attenuator circuit 113 further includes pad value selection switch, described to decline
The control terminal of depreciation selection switch is connected to CPU115, and the CPU115 is used to select switch selection attenuator electricity by pad value
The pad value on road 113.Wherein pad value includes 0dBm or 10dBm, and CPU115 can control pad value in attenuator circuit 113 and select
Select the pad value of switch selection 0dBm or 10dBm.
In the present embodiment, the signal monitoring device further includes signal lamp 116, and the signal lamp 116 connects
It is connected to CPU115, the CPU115 is used to the selection result for controlling signal selecting switch or pad value selection switch passing through signal
Indicator light 116 is shown.CPU115 can be according to the type or attenuator electricity for the signal acquisition interface that selection coupling circuit 112 connect
The pad value on road 113 carries out control signal lamp 116, wherein cable interface 118 is aobvious using red signal lamp 116
Show, power line interface 117 shows that Cabie line interface is using blue signal lamp using the signal lamp 116 of green
116 are shown.
Referring to Fig. 8, in the present embodiment, in order to facilitate later period checking to the electric power signal of acquisition, at the data
Reason device 120 is also used to for received electric power signal data being stored in database.When data processor 120 receives capture card 111
It after the electric power signal data sent by signal transmission interface 114, is deposited into database, facilitates the later period can be by from number
It is checked and is analyzed according to called data in library.Refering to Fig. 9, simultaneously because database storage capacity postal is limited, it is periodically right to need
Database arrange it is data cached, by judging whether Database size is more than preset range, if be more than preset range, it is whole
Database data is managed, out-of-date data content in the library that clears data.Refering to fig. 10, and the number in database is checked for convenience
According to the data in database being generated to display image, the data processor 120 be also used to the electric power in reading database
Signal data generates waveform patterns according to reference axis parameter.The step of generating display image includes: to detect reference axis parameter first
Whether change, if no change has taken place, directly read the data acquired in database, if changing, obtains new
Reference axis parameter, Axis Patterns are generated according to new reference axis parameter, are then read out the data acquired in database,
Then according to reference axis parameter, the waveform patterns of acquisition data and the waveform patterns of electric power signal are generated.Wherein, when generation wave
After shape pattern, can continue to determine whether to generate data scale, to, then read scale parameter, then according to scale parameter and
Coordinate system generates scale pattern.
Refering to fig. 11, and judgement line status is carried out by the data in database, firstly, acquired in reading database
Whether electric power signal data, the electric power signal data that you acquire meet abnormal data foundation, carry out if so, generating visual interface
Warning, while carrying out saving the abnormal data, and record exception generation in log information.
It should be noted that being not intended to limit although the various embodiments described above have been described herein
Scope of patent protection of the invention.Therefore, it based on innovative idea of the invention, change that embodiment described herein is carried out and is repaired
Change, or using equivalent structure or equivalent flow shift made by description of the invention and accompanying drawing content, it directly or indirectly will be with
Upper technical solution is used in other related technical areas, is included within scope of patent protection of the invention.
Claims (10)
1. a kind of electric power signal monitoring device, which is characterized in that including signal acquisition interface, signal extracting circuit, capture card and
Signal transmission interface；
The signal acquisition interface is connected to signal extracting circuit, and the signal extracting circuit is connected to capture card, the acquisition
Card is connected to external processing equipment by signal transmission interface；
The signal acquisition interface is for connecting test line；
The signal extracting circuit is used to extract the electric power signal on test line by signal acquisition interface；
The capture card after the electric power signal that signal extracting circuit acquires is handled, decomposed and demodulated by signal for being passed
Defeated interface is sent to external processing equipment.
2. electric power signal monitoring device according to claim 1, which is characterized in that the signal acquisition interface includes power line
Interface, cable interface and Cabie interface.
3. electric power signal monitoring device according to claim 1, which is characterized in that the signal extracting circuit includes coupling electricity
Road, the coupling circuit are used to extract the high-frequency carrier signal on test line, and prevent electric current present on test line.
4. electric power signal monitoring device according to claim 1, which is characterized in that it further include attenuator circuit, the decaying
Device circuit extracts the size of the electric power signal of circuit acquisition for adjustment signal.
5. electric power signal monitoring device according to claim 4, which is characterized in that further include CPU, the attenuator circuit is also
It selects to switch including pad value, the control terminal of the pad value selection switch is connected to CPU, and the CPU is for passing through pad value
The pad value of selection switch selection attenuator circuit.
6. electric power signal monitoring device according to claim 1, which is characterized in that further include CPU and channel selection switch, institute
It states signal acquisition interface and signal extracting circuit is connected to by channel selection switch, the CPU is for control channel selection switch
Select data processing circuit connection signal acquisition interface.
7. according to claim 5 or the electric power signal monitoring device, which is characterized in that it further include signal lamp, the letter
Number indicator light is connected to CPU, and the CPU passes through for that will control the selection result of signal selecting switch or pad value selection switch
Signal lamp is shown.
8. electric power signal monitoring device according to claim 1, which is characterized in that the signal transmission interface is USB interface.
9. a kind of no new line leakage of information monitors system, which is characterized in that including electric power signal monitoring device and data processor；
The electric power signal monitoring device includes signal acquisition interface, signal extracting circuit, capture card and signal transmission interface；Institute
It states signal acquisition interface and is connected to signal extracting circuit, the signal extracting circuit is connected to capture card, and the capture card passes through
Signal transmission interface is connected to data processor；
The signal acquisition interface is for connecting test line；
The signal extracting circuit is used to extract the electric power signal on test line by signal acquisition interface；
The capture card after the electric power signal that signal extracting circuit acquires is handled, decomposed and demodulated by signal for being passed
Defeated interface is sent to data processor；
The data processor is used to be carried out according to the electric power signal of acquisition special with the presence or absence of signal of communication on judgement test line
Value indicative, signal of communication characteristic value, then issue alarm signal if it exists.
10. monitoring system without new line leakage of information according to claim 9, which is characterized in that the data processor is also used
It is stored in database in by received electric power signal data, and the electric power signal data in reading database are according to reference axis parameter
Generate waveform patterns.
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| CN108023614A (en) * | 2017-12-15 | 2018-05-11 | 国网江苏省电力有限公司电力科学研究院 | Low-voltage powerline carrier communication device and power information acquisition system and acquisition method |
| CN210093428U (en) * | 2019-09-25 | 2020-02-18 | 福州创宏诚信息科技有限公司 | Power signal monitoring device and wireless information leakage monitoring system |
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