CN113156221A - Monitoring device and monitoring system based on electromagnetic leakage - Google Patents
Monitoring device and monitoring system based on electromagnetic leakage Download PDFInfo
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- CN113156221A CN113156221A CN202110325844.3A CN202110325844A CN113156221A CN 113156221 A CN113156221 A CN 113156221A CN 202110325844 A CN202110325844 A CN 202110325844A CN 113156221 A CN113156221 A CN 113156221A
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- G—PHYSICS
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/0864—Measuring electromagnetic field characteristics characterised by constructional or functional features
- G01R29/0892—Details related to signal analysis or treatment; presenting results, e.g. displays; measuring specific signal features other than field strength, e.g. polarisation, field modes, phase, envelope, maximum value
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
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Abstract
The embodiment of the invention discloses a monitoring device and a monitoring system based on electromagnetic leakage. The monitoring device comprises an electromagnetic signal detection module, a main control module and a feedback control module, wherein the electromagnetic signal detection module is used for collecting electromagnetic signals generated by external information equipment and dividing the electromagnetic signals into different frequency spectrum information according to frequency bands, the main control module is electrically connected with the electromagnetic signal detection module and is used for comparing and analyzing the frequency spectrum information of different frequency bands with the normal frequency spectrum information of the corresponding frequency bands of the external information equipment in real time and outputting an electromagnetic leakage instruction, and the feedback control module is electrically connected with the main control module and is used for feeding back the electromagnetic leakage information to a user and/or controlling the disconnection of the external information equipment from a power grid according to the electromagnetic leakage instruction. The embodiment of the invention realizes frequency division analysis and processing of the electromagnetic signals in a wider frequency range, realizes real-time electromagnetic signal monitoring of the external information equipment in the using process, and can avoid the risk of electromagnetic leakage caused by failure, efficiency weakening and the like.
Description
Technical Field
The embodiment of the invention relates to the technical field of electronic information equipment, in particular to a monitoring device and a monitoring system based on electromagnetic leakage.
Background
Electromagnetic leakage, including radiation and conduction leakage, is prevalent in electronic information devices; in the important field, if the information equipment has electromagnetic leakage problems, the leaked information is likely to be collected by people and restored into useful information, so that the leakage problem is caused.
At present, electronic information technology equipment generally adopts a comprehensive shielding technology to prevent electromagnetic leakage during design, adopts a red and black power supply to isolate when the equipment is in operation and use, lacks direct real-time observation on information identification electromagnetic leakage processing efficiency, has the risks of electromagnetic leakage caused by failure, efficiency weakening and the like, has a narrow frequency coverage range under the condition of high resolution, and is more easy to cause electromagnetic leakage.
Disclosure of Invention
The embodiment of the invention provides a monitoring device and a monitoring system based on electromagnetic leakage, which are used for realizing real-time acquisition and monitoring of electromagnetic characteristics of information equipment in operation in a wide frequency band, providing an abnormal alarm function and avoiding the risk of electromagnetic leakage caused by failure, efficiency weakening and the like.
In a first aspect, an embodiment of the present invention provides a monitoring device based on electromagnetic leakage, including:
the electromagnetic signal detection module is used for collecting electromagnetic signals generated by external information equipment and dividing the electromagnetic signals into different frequency spectrum information according to frequency bands;
the main control module is electrically connected with the electromagnetic signal detection module and is used for comparing and analyzing the frequency spectrum information of different frequency bands with the normal frequency spectrum information of the frequency band corresponding to the external information equipment in real time and outputting an electromagnetic leakage instruction;
and the feedback control module is electrically connected with the main control module and is used for feeding back electromagnetic leakage information to a user according to the electromagnetic leakage instruction and/or controlling the disconnection of the external information equipment and the power grid.
Optionally, the electromagnetic signal detection module includes a frequency generation unit, a mixer group, a filtering unit, a signal amplification unit, and an analog-to-digital conversion unit;
the frequency generation unit is electrically connected with the frequency mixer group;
the frequency generation unit is used for generating a carrier signal;
the mixer group comprises a plurality of mixers which are sequentially started to carry out frequency division processing on the electromagnetic signals;
the filtering unit is used for filtering noise outside an analysis frequency band;
the signal amplification unit is used for amplifying and processing the frequency spectrum information of each frequency band;
the analog-to-digital conversion unit is used for performing analog-to-digital conversion on the frequency spectrum information of each frequency band and providing the frequency spectrum information to the main control module. Optionally, the set of mixers comprises a first mixer, a second mixer and a third mixer;
the first frequency mixer is used for separating and outputting the electromagnetic signals with the middle frequency band of 10KHz-30 MHz;
the second mixer is used for separating and outputting the electromagnetic signals with the intermediate frequency range of 30MHz-1 GH;
the third mixer is used for separating and outputting the electromagnetic signals with the electromagnetic signal middle frequency range of 1GHz-6 GH.
Optionally, the monitoring device further includes at least one of a current detection module, a temperature and humidity detection module, and an anti-plugging detection module;
the current detection module is used for collecting current signals generated by the external information equipment;
the temperature and humidity detection module is used for acquiring a temperature value and a humidity value of the environment where the external information equipment is located;
the anti-plugging detection module is used for acquiring whether the power supply of the external information equipment is plugged in or out accidentally;
the main control module is used for detecting the abnormal state of the external information equipment according to the current signal, the temperature value, the humidity value and whether the power supply of the external information equipment is plugged or unplugged accidentally.
Optionally, the current detection module includes a current sensor, and the current sensor is electrically connected to the external information device and the main control module, and is configured to collect a current signal generated by the external information device and transmit the current signal to the main control module;
the main control module is used for comparing and analyzing the current signal with a current signal when the external information equipment works normally, and outputting a current abnormal instruction to the feedback control module;
the feedback control module feeds current abnormal information back to a user according to the current abnormal instruction and/or controls to disconnect the external information equipment from the power grid;
the temperature and humidity detection module comprises a temperature and humidity sensor which is respectively electrically connected with the main control module and is used for collecting the temperature value and the humidity value of the environment where the external information equipment is located and transmitting the temperature value and the humidity value to the main control module;
the main control module is used for comparing and analyzing the temperature value and the humidity value with a temperature value and a humidity value of an environment where the external information equipment is located when the external information equipment works normally, and outputting a temperature abnormity instruction and a humidity abnormity instruction to the feedback control module;
the feedback control module feeds back temperature abnormal information and humidity abnormal information to a user according to the temperature abnormal instruction and the humidity abnormal instruction and/or controls to disconnect the external information equipment from the power grid;
the anti-plug detection module comprises an anti-plug sensor, the anti-plug sensor is electrically connected with the main control module and is used for acquiring whether the power supply of the external information equipment is accidentally plugged and unplugged or not and transmitting the power supply accidental plugging and unplugging signal of the external information equipment to the main control module;
the main control module is used for controlling the feedback control module to feed back the accidental plugging and unplugging information of the external information equipment power supply to a user and/or controlling the disconnection of the external information equipment and the power grid according to the accidental plugging and unplugging signal of the external information equipment power supply.
Optionally, the main control module includes a data memory and an FPGA processor;
the data memory is used for storing the normal frequency spectrum information of the corresponding frequency band of the external information equipment;
the FPGA processor is used for calculating frequency spectrum information of different frequency bands in real time, and extracting normal frequency spectrum information of the frequency band corresponding to the external information equipment in the data memory for comparison.
Optionally, the feedback control module includes a relay, the relay is connected between the external information device and the power grid, and a control end of the relay is electrically connected with the main control module; and the relay is used for disconnecting the external information equipment from the power grid according to the electromagnetic leakage instruction.
Optionally, the feedback control module further includes an indicator light and/or a buzzer, the indicator light is configured to feed back electromagnetic leakage information to the user in an on-off manner according to the electromagnetic leakage instruction, and the buzzer is configured to feed back the electromagnetic leakage information to the user in a buzzing manner according to the electromagnetic leakage instruction.
Optionally, the monitoring device further includes a data interface module, and an input end of the data interface module is electrically connected to the main control module;
the data interface module is used for outputting the electromagnetic leakage instruction.
In a second aspect, an embodiment of the present invention further provides a monitoring system, including the monitoring apparatus based on electromagnetic leakage according to the first aspect and a background;
the background is electrically connected with at least one monitoring device respectively and is used for displaying the electromagnetic leakage instruction and feeding back electromagnetic leakage information to a user according to the electromagnetic leakage instruction.
The monitoring device based on electromagnetic leakage comprises an electromagnetic signal detection module, a main control module and a feedback control module, wherein an electromagnetic signal generated by external information equipment is acquired through an electromagnetic signal acquisition module, the electromagnetic signal is divided into different frequency spectrum information according to frequency bands, the main control module performs comparative analysis on the frequency spectrum information of different frequency bands and the normal frequency spectrum information of the corresponding frequency bands of the external information equipment in real time, an electromagnetic leakage instruction is output to the feedback control module, the feedback control module feeds back the electromagnetic leakage information to a user according to the electromagnetic leakage instruction and/or controls the disconnection of the external information equipment and a power grid, frequency division analysis and processing of the electromagnetic signal in a wider frequency band range are realized, the frequency spectrum information of different frequency bands and the normal frequency spectrum information of the corresponding frequency bands of the external information equipment are contrastively analyzed and evaluated to judge the risk of the electromagnetic leakage, the real-time electromagnetic signal monitoring of the external information equipment in the using process is realized, and the risk of electromagnetic leakage caused by failure, efficiency weakening and the like is avoided.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
fig. 1 is a schematic structural diagram of a monitoring device based on electromagnetic leakage according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a sampling of an electromagnetic signal provided by an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an electromagnetic signal detection module according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a monitoring system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention are described in further detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention.
It should be further noted that, in order to further explain the technical means and effects of the present invention adopted to achieve the predetermined object, the following detailed description and the preferred embodiments are provided with reference to the accompanying drawings and the preferred embodiments for describing the specific implementation, structure, features and effects of the electromagnetic leakage based monitoring device and the monitoring system according to the present invention.
Fig. 1 is a schematic structural diagram of a monitoring device based on electromagnetic leakage according to an embodiment of the present invention. As shown in fig. 1, the monitoring device includes: the electromagnetic signal detection module 110 is used for collecting electromagnetic signals generated by external information equipment and dividing the electromagnetic signals into different frequency spectrum information according to frequency bands, the main control module 120 is electrically connected with the electromagnetic signal detection module 110 and used for comparing and analyzing the frequency spectrum information of different frequency bands with normal frequency spectrum information of corresponding frequency bands of the external information equipment in real time and outputting an electromagnetic leakage instruction, and the feedback control module 130 is electrically connected with the main control module 120 and used for feeding back the electromagnetic leakage information to a user and/or controlling disconnection of the external information equipment from a power grid according to the electromagnetic leakage instruction.
The electromagnetic leakage is generated when the equipment of the information system radiates out through a ground wire, a power line, a signal wire, a parasitic electromagnetic signal or harmonic wave and the like during operation. If the electromagnetic signals are received, the original information can be recovered through extraction processing, and information decryption can be caused. Specifically, the electromagnetic signals generated by the external information equipment can be conducted to the power grid through the power line, and the monitoring device is arranged between the external information equipment and the power grid, so that the electromagnetic signals can be identified and analyzed, and the electromagnetic signals are prevented from being leaked.
For example, the external information device may be an information device such as a server, or may be another information device, which is not limited herein.
Fig. 2 is a schematic diagram of sampling an electromagnetic signal according to an embodiment of the present invention. As shown in fig. 2, the electromagnetic signal detection module 110 extracts the electromagnetic signal generated by the external information device through the listening and coupling network 210, and considering that the acquired electromagnetic signal is in a frequency range of a wider frequency band, the main control module 120 cannot process signals of all frequency bands, and the electromagnetic signal detection module 110 further divides the acquired electromagnetic signal into different frequency information according to the frequency bands, so that the frequency range can be covered under the condition of guaranteeing high frequency resolution, and omission in the process of acquiring and detecting the electromagnetic signal is avoided. Next, the divided frequency spectrum information of different frequency bands is transmitted to the main control module 120 to process and calculate the frequency spectrum information, the frequency spectrum information is compared in real time according to the related frequency spectrum information stored by the external information equipment in the normal working mode of the corresponding frequency band, when the main control module 120 obtains the frequency spectrum information of different frequency bands transmitted to the main control module 120 through comparison and analysis and exceeds the use range of the frequency spectrum information of the external information equipment in the normal working mode of the corresponding frequency band, the main control module 120 outputs an electromagnetic leakage instruction to the feedback control module, the feedback control module controls disconnection of connection between the external information equipment and the power grid, and electromagnetic signal leakage is avoided and is conducted to the power grid through a power line.
As described above, the electromagnetic signal detection module 110 extracts the electromagnetic signal generated by the external information device through the listening coupling network 210, which is well known to those skilled in the art and will not be described in detail herein.
In addition, it should be noted that the related information stored by the external information device in the normal operating mode is not limited to the spectrum information, in this embodiment, in order to further detect whether the spectrum information of the acquired electromagnetic signal in different frequency bands exceeds the use range of the spectrum information stored by the external information device in the normal operating mode of the corresponding frequency band, in some other embodiments, the related information stored by the external information device in the normal operating mode may be other, which is related to and correspondingly compared with the signal transmitted to the main control module, and the detailed description thereof is embodied in other embodiments.
The monitoring device based on electromagnetic leakage provided by the embodiment comprises an electromagnetic signal detection module, a main control module and a feedback control module, wherein the electromagnetic signal detection module is used for collecting electromagnetic signals generated by external information equipment and dividing the electromagnetic signals into different frequency spectrum information according to frequency bands, the main control module is electrically connected with the electromagnetic signal detection module and is used for comparing and analyzing the frequency spectrum information of different frequency bands with the normal frequency spectrum information of the corresponding frequency bands of the external information equipment in real time and outputting an electromagnetic leakage instruction, the feedback control module is electrically connected with the main control module and is used for feeding the electromagnetic leakage information back to a user and/or controlling the connection of the external information equipment and a power grid to be disconnected according to the electromagnetic leakage instruction, so that the frequency division analysis and processing of the electromagnetic signals in a wider frequency band range are realized, the frequency spectrum information of different frequency bands and the normal frequency spectrum information of the corresponding frequency bands of the external information equipment are compared and analyzed to judge the risk of the electromagnetic leakage, the real-time electromagnetic signal monitoring of the external information equipment in the using process is realized, and the risk of electromagnetic leakage caused by failure, efficiency weakening and the like is avoided.
Fig. 3 is a schematic structural diagram of an electromagnetic signal detection module according to an embodiment of the present invention. As shown in fig. 3, the electromagnetic signal detecting module includes a frequency generating unit 310, a mixer group 320, a filtering unit 330, a signal amplifying unit 340, and an analog-to-digital converting unit 350, wherein the mixer group 320, the filtering unit 330, the signal amplifying unit 340, and the analog-to-digital converting unit 350 are sequentially electrically connected, the frequency generating unit 310 is electrically connected to the mixer group 320, the frequency generating unit 310 is configured to generate a carrier signal, the mixer group 320 includes a plurality of mixers, the mixers are sequentially turned on to perform frequency division processing on the electromagnetic signal, the filtering unit 330 is configured to filter noise outside an analysis frequency band, the signal amplifying unit 340 is configured to amplify and process frequency spectrum information of each frequency band and provide the frequency spectrum information to the main control module 120, and the analog-to-digital converting unit 350 is configured to perform analog-to-digital conversion on the frequency spectrum information of each frequency band and provide the frequency spectrum information to the main control module 120.
Because the electromagnetic signal collected by the electromagnetic signal detection module is located in the frequency range of a wide frequency band, the corresponding spectrum information generally corresponds to the frequency band of 10KHz-6GHz, the electromagnetic signal needs to be converted from a high frequency to a low frequency that can be sampled by the analog-to-digital conversion unit 350 by a mixer, and because one mixer is difficult to process all the electromagnetic signals in the wide frequency band, a plurality of mixers need to perform segmentation.
Specifically, the electromagnetic signals collected by the electromagnetic signal detection module first pass through the frequency mixer group 320, a plurality of frequency mixers in the frequency mixer group 320 are sequentially opened, each frequency mixer analyzes the electromagnetic signals in a frequency band, after the last frequency mixer finishes analyzing the electromagnetic signals, the filtering unit 330 filters and analyzes noise signals outside the frequency band of 10KHz to 6GHz, and transmits the filtered signals to the signal amplification unit 340, the signal amplification unit 340 amplifies the signals to a position with a proper measurement range of the analog-to-digital conversion unit 350 according to the characteristics of receiving channels in different frequency bands, and the analog-to-digital conversion unit transmits the signals to the main control module for fast calculation to obtain amplitude-frequency information of each frequency point in the corresponding frequency band after demodulation.
It should be noted that, after frequency mixing, filtering and amplifying electromagnetic signals of different frequency bands, demodulating signals of corresponding frequency bands, and sending the demodulated signals into the main control module, the fast operation method of the main control module on the signals is fourier change, the calculation method can fast decompose the signals into frequency spectrum during signal processing, and can obtain amplitude corresponding to frequency, and the specific operation process is well known by those skilled in the art, and will not be described in detail here.
Optionally, with continued reference to fig. 3, the mixer group 320 includes a first mixer 321, a second mixer 322, and a third mixer 323, where the first mixer 321 is configured to separate and output an electromagnetic signal with a middle frequency range of 10KHz to 30MHz, the second mixer 322 is configured to separate and output an electromagnetic signal with a middle frequency range of 30MHz to 1GH, and the third mixer 323 is configured to separate and output an electromagnetic signal with a middle frequency range of 1GHz to 6 GH.
As described above, since it is difficult for one mixer to process all electromagnetic signals in a wide frequency band, it is necessary to perform processing by a plurality of mixer segments. In this embodiment, the mixer group turns on the three mixers in turn, the electromagnetic signal in each frequency band is filtered and amplified and then sampled to the main control module for processing, and the main control module quickly decomposes the signal into frequency spectrums and prestores data results, for example, the frequency spectrum information of each frequency band can be stored in one data packet, which facilitates the subsequent filtering and amplifying processing of the frequency spectrum information of each frequency band.
Optionally, with reference to fig. 1, the monitoring apparatus further includes at least one of a current detection module 140, a temperature and humidity detection module 150, and an anti-plugging detection module 160, where the current detection module 140 is configured to collect a current signal generated by the external information device, the temperature and humidity detection module 150 is configured to collect a temperature value and a humidity value of the environment where the external information device is located, the anti-plugging detection module 160 is configured to collect whether a power supply of the external information device is an accidental plugging signal, and the main control module 120 is configured to perform state anomaly detection on the external information device according to the current signal, the temperature value and the humidity value, and whether the power supply of the external information device is an accidental plugging signal.
On the basis of the above embodiment, when there are some other electromagnetic signals, that is, a current signal, an abnormal temperature and humidity signal, and an unexpected external information device power plugging/unplugging signal, if the signal affects the normal operation of the external information device, the main control module 120 compares and analyzes the electromagnetic characteristic information with the electromagnetic characteristic information of the external information device during the normal operation, outputs an abnormal instruction to the feedback control module 130, and the feedback control module 130 feeds back the abnormal instruction to the user according to the abnormal instruction, and controls to disconnect the external information device from the power grid, thereby providing a powerful guarantee for the safe use of the external information device in a special environment with high data safety requirements.
Optionally, the current detection module 140 includes a current sensor, the current sensor 140 is electrically connected to the external information device and the main control module 120, and is configured to collect a current signal generated by the external information device and transmit the current signal to the main control module 120, the main control module 129 is configured to compare and analyze the current signal with a current signal generated when the external information device normally operates, and output a current abnormal instruction to the feedback control module 130, the feedback control module 130 feeds back current abnormal information to a user according to the current abnormal instruction and/or controls to disconnect the connection between the external information device and the power grid, the temperature and humidity detection module 150 includes a temperature and humidity sensor, the temperature sensor is electrically connected to the main control module 120, and is configured to collect a temperature value and a humidity value of an environment where the external information device is located, and transmit the temperature value and the humidity value to the main control module 120, the main control module 120 is used for comparing and analyzing the temperature value and the humidity value with the temperature value and the humidity value of the environment when the external information device normally works, and outputting a temperature abnormal instruction and a humidity abnormal instruction to the feedback control module 130, the feedback control module 130 feeds back the temperature abnormal information and the humidity abnormal information to the user according to the temperature abnormal instruction and the humidity abnormal instruction and/or controls to disconnect the external information device from the power grid, the anti-plugging detection module 160 comprises an anti-plugging sensor which is electrically connected with the main control module and is used for collecting whether the power supply of the external information device is plugged or not unexpectedly and transmitting the power supply accidental plugging signal of the external information device to the main control module 120, the main control module 120 is used for controlling the feedback control module 130 to feed back the power supply accidental plugging signal of the external information device to the user and/or controlling to disconnect the external information device and the external information device from the main control module 120 according to the power supply accidental plugging signal of the external information device And (5) connecting the power grid.
For example, the current sensor uploads the collected current signal of the external information device to the main control module 120, and the main control module 120 performs analysis processing, specifically, the main control module 120 compares the current signal with the current signal stored in the external information device in the normal operating mode, and if the current signal obtained through analysis of the comparison result exceeds the use range of the current signal stored in the external information device in the normal operating mode, it indicates that the collected current signal is abnormal, and transmits the current signal to the feedback control module 130. Similarly, the temperature and humidity sensor is connected to the external information device, converts the temperature value and the humidity value of the environment where the external information device is located when the external information device is used into an electrical signal which is easy to measure and process, and uploads the electrical signal to the main control module 120, and the comparison and analysis method of the temperature value and the humidity value of the environment in the main control module 120 when the external information device normally works is similar to the comparison and analysis of the current signal, and is not repeated here.
In addition, the anti-plugging sensor is used for detecting whether the power supply of the external information device is plugged accidentally, if the power supply of the external information device is plugged accidentally, the accidental plugging signal is transmitted to the main control module 120 for comparison and analysis, and a specific analysis method is similar to the analysis method, and is not repeated here.
Optionally, the main control module includes a data memory and an FPGA processor, the data memory is used for storing normal spectrum information of a frequency band corresponding to the external information device, and the FPGA processor is used for calculating spectrum information of different frequency bands in real time, and extracting the normal spectrum information of the frequency band corresponding to the external information device in the data memory for comparison.
The FPGA processor is a digital integrated circuit chip, and compared with a common processor, the FPGA processor can perform data and task calculation in real time and in parallel at high speed, has a low power consumption characteristic, and has more obvious efficiency in processing a specific application, and a specific calculation process thereof is a technology known by those skilled in the art and will not be described in detail herein.
Specifically, the data memory stores normal frequency spectrum information of the external information device in a corresponding frequency band, and in other embodiments, the data memory can also store frequency spectrum information of different frequency bands which are calculated by the FPGA processor in real time, so that the FPGA processor can be directly extracted conveniently. In this embodiment, the external information device stores the spectrum information in the corresponding frequency band in the normal operating mode into the data memory, and the FPGA processor compares and analyzes the spectrum information of each frequency band amplified by the mixing filtering with the spectrum information stored in the data memory in turn, thereby implementing real-time operation and analysis of the spectrum information.
It should be noted that in some other embodiments, the data storage device may further store other signals, for example, a current signal, a temperature signal, a humidity signal, or a signal indicating whether the power source of the external information device is accidentally plugged or unplugged.
Optionally, with continued reference to fig. 1, the feedback control module 130 includes a relay 180, the relay 180 is connected between the external information device and the power grid, a control terminal of the relay 180 is electrically connected to the main control module 120, and the relay 180 is configured to disconnect the external information device from the power grid according to the electromagnetic leakage instruction.
The relay 180 is an electric control device, and is an electric appliance that turns on or off a controlled output circuit when a change in an input amount meets a predetermined requirement, and has advantages of fast operation, stable operation, long service life, small size, and the like. In this embodiment, the input quantity is specifically an electromagnetic leakage instruction, a current signal instruction, a temperature signal instruction, a humidity signal instruction, and a signal indicating whether the power supply of the external information device is accidentally plugged or unplugged, and the output circuit is specifically a circuit for connecting the external information device to the power grid.
Illustratively, spectrum information of different frequency bands formed by dividing electromagnetic signals collected from external information equipment is transmitted to the main control module to process and calculate the spectrum information, the spectrum information is compared in real time according to related spectrum information stored in the external information equipment in a normal working mode of the corresponding frequency band, when the main control module 120 obtains the spectrum information of the different frequency bands transmitted to the main control module 120 through comparison and analysis and exceeds the use range of the spectrum information of the external information equipment in the normal working mode of the corresponding frequency band, the main control module 120 outputs an electromagnetic leakage instruction to the relay 180, and the relay 180 controls disconnection between the external information equipment and a power grid.
Optionally, with continued reference to fig. 1, the feedback control module 130 further includes an indicator light and/or a buzzer 190, the indicator light is used for feeding back electromagnetic leakage information to the user by lighting according to the electromagnetic leakage instruction, and the buzzer is used for feeding back electromagnetic leakage information to the user by buzzing according to the electromagnetic leakage instruction.
The buzzer is an electronic buzzer with an integrated structure, and the principle of the buzzer is that square wave signals are input into a resonance device and converted into sound signals to be output.
Illustratively, when the master control module obtains, through comparative analysis, that the frequency spectrum information of different frequency bands transmitted to the master control module exceeds the use range of the frequency spectrum information of the external information device in the normal working mode of the corresponding frequency band, the master control module controls the indicator lamp to be turned on, the state of the indicator lamp can be changed into brightening or continuous flashing, yellow light or red light is emitted to feed back to a user, the user obtains that an electromagnetic signal is leaked after seeing that the yellow light or the red light of the indicator lamp is brightened or continuously flashed, and disconnection of the external information device from the power supply of the external information device can be controlled by timely turning off the power supply of the external information device, so that the risk of electromagnetic leakage is avoided.
Similarly, when the master control module obtains, through comparative analysis, that the frequency spectrum information of different frequency bands transmitted to the master control module exceeds the use range of the frequency spectrum information of the external information equipment in the normal working mode of the corresponding frequency band, the master control module controls the buzzer to buzz, a user obtains that an electromagnetic signal leaks after hearing the buzzing sound, and the connection between the external information equipment and a power grid can be controlled to be disconnected by timely turning off the power supply of the external information equipment, so that the risk of electromagnetic leakage is avoided.
Optionally, with reference to fig. 1, the monitoring device further includes a data interface module 170, an input end of the data interface module 170 is electrically connected to the main control module 120, and the data interface module 170 is configured to output the electromagnetic leakage instruction.
The data interface module 170 may be a wireless data interface or a wired communication interface. When the wireless data interface module is electrically connected with the main control module 120 and the feedback control module 130, the main control module 120 can be connected with a wireless router, or connected to a WIFI hotspot of a mobile phone to form networking, so that a user can directly obtain electromagnetic leakage information conveniently. When the data interface module 170 is a wired communication interface, the communication interface may be various interfaces, for example, a USB interface, a 485 communication interface, and the like.
Specifically, when the main control module 120 obtains, through comparison and analysis, that the frequency spectrum information of different frequency bands transmitted to the main control module 120 exceeds the use range of the frequency spectrum information of the external information device in the normal operating mode of the corresponding frequency band, the main control module 120 controls the data interface module connected to the main control module 120 to output an electromagnetic leakage instruction, and the user controls to disconnect the external information device from the power grid according to the received electromagnetic leakage instruction, so that the electromagnetic signal is prevented from being leaked and transmitted to the power grid through a power line.
Fig. 4 is a schematic structural diagram of a monitoring system according to an embodiment of the present invention. As shown in fig. 4, the monitoring system 400 includes the monitoring device 410 based on electromagnetic leakage and a background 420 provided in any of the above embodiments, and the background 420 is electrically connected to at least one monitoring device 410, respectively, and is configured to display an electromagnetic leakage instruction and feed back electromagnetic leakage information to a user according to the electromagnetic leakage instruction.
The monitoring system 400 provided in this embodiment includes any monitoring device 410 provided in this embodiment of the present invention, which has the same or corresponding beneficial effects as the monitoring device 410, and is not described herein again.
In addition, to achieve the purpose of monitoring electromagnetic signals in real time during the use of the external information devices, each external information device needs to correspond to an independent monitoring device 410, and each monitoring device 410 is connected to the background 420 through a network, so that the real-time information security monitoring of the monitoring system is achieved, and the risk of electromagnetic leakage caused by failure, efficiency weakening and the like is avoided.
It should be noted that the background 420 may be a computer or others, and is not limited herein.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions without departing from the scope of the invention. Therefore, although the present invention has been described in more detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. An electromagnetic leakage based monitoring device, comprising:
the electromagnetic signal detection module is used for collecting electromagnetic signals generated by external information equipment and dividing the electromagnetic signals into different frequency spectrum information according to frequency bands;
the main control module is electrically connected with the electromagnetic signal detection module and is used for comparing and analyzing the frequency spectrum information of different frequency bands with the normal frequency spectrum information of the corresponding frequency band of the external information equipment in real time and outputting an electromagnetic leakage instruction;
and the feedback control module is electrically connected with the main control module and is used for feeding back electromagnetic leakage information to a user according to the electromagnetic leakage instruction and/or controlling the disconnection of the external information equipment and the power grid.
2. The monitoring device of claim 1, wherein the electromagnetic signal detection module comprises a frequency generation unit, a mixer group, a filtering unit, a signal amplification unit and an analog-to-digital conversion unit;
the frequency generation unit is electrically connected with the frequency mixer group;
the frequency generation unit is used for generating a carrier signal;
the mixer group comprises a plurality of mixers which are sequentially started to carry out frequency division processing on the electromagnetic signals;
the filtering unit is used for filtering noise outside an analysis frequency band;
the signal amplification unit is used for amplifying and processing the frequency spectrum information of each frequency band;
the analog-to-digital conversion unit is used for performing analog-to-digital conversion on the frequency spectrum information of each frequency band and providing the frequency spectrum information to the main control module.
3. The monitoring device of claim 2, wherein the set of mixers comprises a first mixer, a second mixer, and a third mixer;
the first frequency mixer is used for separating and outputting the electromagnetic signals with the middle frequency band of 10KHz-30 MHz;
the second mixer is used for separating and outputting the electromagnetic signals with the intermediate frequency range of 30MHz-1 GH;
the third mixer is used for separating and outputting the electromagnetic signals with the electromagnetic signal middle frequency range of 1GHz-6 GH.
4. The monitoring device of claim 1, further comprising at least one of a current detection module, a temperature and humidity detection module, and an anti-plugging detection module;
the current detection module is used for collecting current signals generated by the external information equipment;
the temperature and humidity detection module is used for acquiring a temperature value and a humidity value of the environment where the external information equipment is located;
the anti-plugging detection module is used for acquiring whether the power supply of the external information equipment is plugged in or out accidentally;
the main control module is used for detecting the abnormal state of the external information equipment according to the current signal, the temperature value, the humidity value and whether the power supply of the external information equipment is plugged or unplugged accidentally.
5. The monitoring device according to claim 4, wherein the current detection module comprises a current sensor, and the current sensor is electrically connected with the external information device and the main control module, and is used for collecting a current signal generated by the external information device and transmitting the current signal to the main control module;
the main control module is used for comparing and analyzing the current signal with a current signal when the external information equipment works normally, and outputting a current abnormal instruction to the feedback control module;
the feedback control module feeds current abnormal information back to a user according to the current abnormal instruction and/or controls to disconnect the external information equipment from the power grid;
the temperature and humidity detection module comprises a temperature and humidity sensor which is respectively electrically connected with the main control module and is used for collecting the temperature value and the humidity value of the environment where the external information equipment is located and transmitting the temperature value and the humidity value to the main control module;
the main control module is used for comparing and analyzing the temperature value and the humidity value with a temperature value and a humidity value of an environment where the external information equipment is located when the external information equipment works normally, and outputting a temperature abnormity instruction and a humidity abnormity instruction to the feedback control module;
the feedback control module feeds back temperature abnormal information and humidity abnormal information to a user according to the temperature abnormal instruction and the humidity abnormal instruction and/or controls to disconnect the external information equipment from the power grid;
the anti-plugging detection module comprises an anti-plugging sensor which is electrically connected with the main control module and is used for acquiring whether the power supply of the external information equipment is plugged in or not accidentally and transmitting the power supply accidental plugging signal of the external information equipment to the main control module;
the main control module is used for controlling the feedback control module to feed back an unexpected power plugging signal of the external information equipment to a user and/or controlling the external information equipment to be disconnected from the power grid according to the unexpected power plugging signal of the external information equipment.
6. The monitoring device of claim 1, wherein the master control module comprises a data memory and an FPGA processor;
the data memory is used for storing the normal frequency spectrum information of the corresponding frequency band of the external information equipment;
the FPGA processor is used for calculating frequency spectrum information of different frequency bands in real time, and extracting normal frequency spectrum information of the frequency band corresponding to the external information equipment in the data memory for comparison.
7. The monitoring device of claim 1, wherein the feedback control module comprises a relay, the relay is connected between the external information equipment and a power grid, and a control end of the relay is electrically connected with the main control module; and the relay is used for disconnecting the external information equipment from the power grid according to the electromagnetic leakage instruction.
8. The monitoring device according to claim 1, wherein the feedback control module further comprises an indicator light and/or a buzzer, the indicator light is used for feeding back electromagnetic leakage information to a user in an on-off manner according to the electromagnetic leakage instruction, and the buzzer is used for feeding back electromagnetic leakage information to the user in a buzzing manner according to the electromagnetic leakage instruction.
9. The monitoring device of claim 1, further comprising a data interface module, wherein an input end of the data interface module is electrically connected with the main control module; the data interface module is used for outputting the electromagnetic leakage instruction.
10. A monitoring system comprising at least one electromagnetic leakage based monitoring device according to any of claims 1-9 and a background;
the background is electrically connected with at least one monitoring device respectively and is used for displaying the electromagnetic leakage instruction and feeding back electromagnetic leakage information to a user according to the electromagnetic leakage instruction.
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Application publication date: 20210723 |