CN109347595A - A kind of interference information screen method and shielding harness for concerning security matters region - Google Patents
A kind of interference information screen method and shielding harness for concerning security matters region Download PDFInfo
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- CN109347595A CN109347595A CN201811350397.1A CN201811350397A CN109347595A CN 109347595 A CN109347595 A CN 109347595A CN 201811350397 A CN201811350397 A CN 201811350397A CN 109347595 A CN109347595 A CN 109347595A
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- frequency
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K3/00—Jamming of communication; Counter-measures
- H04K3/40—Jamming having variable characteristics
- H04K3/43—Jamming having variable characteristics characterized by the control of the jamming power, signal-to-noise ratio or geographic coverage area
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K3/00—Jamming of communication; Counter-measures
- H04K3/60—Jamming involving special techniques
- H04K3/68—Jamming involving special techniques using passive jamming, e.g. by shielding or reflection
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K3/00—Jamming of communication; Counter-measures
- H04K3/80—Jamming or countermeasure characterized by its function
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention belongs to field of information security technology, more particularly to a kind of interference information screen method for concerning security matters region, present invention simultaneously provides a kind of interference information shielding harness for concerning security matters region, scanning signal is modulated to CDMA through voltage controlled oscillation respectively, GSM and PHS downstream frequency interferes fundamental frequency accordingly, interference fundamental frequency is formed swept-frequency signal by power amplification successively to emit and scan to air-launched respectively from low frequency to high frequency in the form of radio wave, the present invention solves the prior art and exists since its electromagnetic radiation is high-power big, the problem of influence so as to cause electromagnetic radiation to human body, with reducing influence of the electromagnetic radiation to human body, reduce the power consumption of shielding device, other electrical equipments will not be formed and be interfered, realize the advantageous effects of the purpose of environmental protection shielding.
Description
Technical field
The invention belongs to field of information security technology more particularly to a kind of interference information shield sides for concerning security matters region
Method, present invention simultaneously provides a kind of interference information shielding harness for concerning security matters region.
Background technique
It is that in certain frequency range, mobile phone and base station are linked up by radio wave, with certain when operating handset
Baud rate and modulation system complete data and sound transmission, for this Principle of Communication, cellular phone signal shielding device is working
In the process with certain speed from the low end frequency of forward channel to high-end scanning, which can receive message in mobile phone
Messy code interference is formed in signal, mobile phone cannot detect the normal data issued from base station, join mobile phone from establishing with base station
Connect, mobile phone show as search network, no signal, without service system phenomena such as, in concerning security matters region, generally require signal shielding device not
Otherwise the high-power interference signal of the transmitting of interval will result in interference interruption, be unable to ensure screening mass, the prior art exist by
It is high-power big in its electromagnetic radiation, the problem of influence so as to cause electromagnetic radiation to human body.
Summary of the invention
The present invention provides a kind of interference information screen method and shielding harness for concerning security matters region, to solve above-mentioned background
The prior art is proposed in technology there is influence since its electromagnetic radiation is high-power big, so as to cause electromagnetic radiation to human body
Problem.
Technical problem solved by the invention is realized using following technical scheme: a kind of interference letter for concerning security matters region
Cease screen method, comprising:
Scanning signal is modulated to CDMA, GSM and PHS downstream frequency through voltage controlled oscillation respectively and interferes fundamental frequency accordingly；
Interference fundamental frequency is formed swept-frequency signal by power amplification successively to distinguish in the form of radio wave from low frequency to high frequency
Emit to air-launched and scans；
If swept-frequency signal acts in power bracket, no net state is in power bracket；
If swept-frequency signal disappears, restore normal condition.
Further, the interference information screen method further includes duration limitation；
Duration limitation: if swept-frequency signal transmitting is for 20 seconds, stops emitting swept-frequency signal and judge power bracket
Inside whether there is liaison, if whether there is liaison in power bracket, swept-frequency signal emits again, otherwise, not will do it
Swept-frequency signal transmitting.
Further, the swept-frequency signal acts on and does not influence base station nearby in power bracket and work normally and do not influence pair
Other electrical equipments form interference.
Further, the scanning signal is sawtooth signal.
Further, the transmission power of the swept-frequency signal is less than 1W.
Further, the swept-frequency signal will not form data exchange with any equipment.
Further, the no net state includes without search network, no signal and without service.
Meanwhile the present invention also provides a kind of interference information shielding harness for concerning security matters region, comprising: sawtooth signal hair
Raw device, phase inverter, voltage controlled oscillator, power amplifier, transmitting antenna；
The Saw-tooth Signal Waveform Generator is used to occur the swept-frequency signal of sawtooth signal；
The phase inverter is for will be output in voltage controlled oscillator after swept-frequency signal paraphase；
The voltage controlled oscillator is used to the swept-frequency signal of paraphase being modulated to CDMA, GSM and PHS downstream frequency phase respectively
The interference fundamental frequency answered；
The power amplifier will be for that will interfere base band power to amplify and be output in transmitting antenna；
The transmitting antenna is for successively being emitted and being swept to air-launched respectively from low frequency to high frequency in the form of radio wave
If retouching and swept-frequency signal acting in power bracket, no net state is in power bracket, it is extensive if swept-frequency signal disappears
Multiple normal condition.
Further, the Saw-tooth Signal Waveform Generator output is connected to phase inverter, and the phase inverter output is connected to voltage-controlled
Oscillator, the voltage controlled oscillator output are connected to power amplifier, and the power amplifier output is connected to transmitting antenna.
Further, the hunting range of the voltage controlled oscillator is 700MHz~2000MHz.
Advantageous effects:
1, this patent is corresponding using scanning signal to be modulated to CDMA, GSM and PHS downstream frequency respectively through voltage controlled oscillation
Interference fundamental frequency；Interference fundamental frequency is formed swept-frequency signal by power amplification successively to divide in the form of radio wave from low frequency to high frequency
Does not emit and scan to air-launched；If swept-frequency signal acts in power bracket, no net state is in power bracket；
If swept-frequency signal disappears, restore normal condition, since the scanning signal generated by sawtooth signal is after phase inverter paraphase,
It is modulated into voltage controlled oscillator, on identical three wave bands of CDMA, GSM, PHS downstream frequency, the scanning signal of modulation is passed through
After the amplification of overpower amplifier, the size of the power of power amplifier is controlled by voltage-stabiliser tube, its transmission power is made to be less than 1W,
Amplified swept-frequency signal in the form of radio wave to air-launched because swept-frequency signal receives meeting in message signals in mobile phone
Messy code interference is formed, the normal microblogging signal data issued from base station cannot be detected so as to cause mobile phone, so that in certain model
Prevent in enclosing mobile phone from detecting the normal microblogging signal data of base station sending, prevent prevent in a certain range mobile phone from base station
Be attached, this be mobile phone will appear search network, no signal, without service system phenomena such as, therefore, to reach No Mobile Phones
Purpose reduces the lock of frequency range due to being modulated to above identical three wave bands of CDMA, GSM, PHS downstream frequency in this way
It is fixed, it is scanned accordingly, with respect to all band, reduces scanning range and intensity, therefore, greatly reduce electromagnetic radiance, subtract
Influence of the electromagnetic radiation to human body is lacked.
If 2, this patent uses swept-frequency signal to act in power bracket, no net state is in power bracket；If
Swept-frequency signal disappears, then restores normal condition, when sphere of action due to leaving shielding device when mobile phone, and can restore normally to make
With the regionality covered due to controlling shielding ensure that the shield effectiveness of concerning security matters region part, greatly reduce shielding device
Power consumption.
3, this patent will not form data exchange with any equipment using the swept-frequency signal, since Mobile phone screen covert issues
Electric signal be undoubtedly a kind of electromagnetic signal, but this shielding never has any equipment and carries out data exchange with it,
Jump signal can not be just formed forever, to sum up, this signal is used in the state of opposing stationary, it will not be electrical to other
Equipment forms interference, to human body and harmless.
4, this patent is limited using the duration: if swept-frequency signal transmitting is for 20 seconds, stopping emitting swept-frequency signal simultaneously
Judge whether there is liaison in power bracket, if whether there is liaison in power bracket, swept-frequency signal emits again, no
Then, it not will do it swept-frequency signal transmitting, since this method further includes increasing time restriction in the design, i.e. 20s after interference starting
Afterwards, interference module is closed, and shielding device reenters detecting state, is monitored to liaison next time, is being monitored again
To before liaison, interference module is not starting, which not only reduces in interference range electromagnetic radiation to human body
Injury, while the power consumption of shielding device is reduced, it is truly realized the purpose of environmental protection shielding.
5, this patent also provides a kind of interference information shielding harness for concerning security matters region simultaneously, comprising: sawtooth signal
Generator, phase inverter, voltage controlled oscillator, power amplifier, transmitting antenna；Since the structure of cellular phone signal shielding device can be divided into
Sweep-generation circuit, voltage-controlled oscillator circuit (VCO), RF power amplification circuit and this four part of antenna, mobile phone signal shielding
Device is that voltage controlled oscillator running is controlled by sawtooth wave caused by saw-toothed wave generator, and essence generates the frequency sweep of working frequency
Signal, each frequency sweep cycle are equal in each of working frequency range frequency point, each frequency point increases a broad pulse
(caused by a sawtooth wave trace) and burst pulse (caused by sawtooth wave flyback) can be changed by adjusting R and C in voltage controlled oscillator
The signal frequency that varying signal shielding device is issued passes through sawtooth wave pair to control the band limits that signal shielding device is shielded
Voltage controlled oscillator (VCO) output dominant frequency is controlled in the radiation signal of down going channel, and by RF power amplification to radiofrequency signal
It amplifies, it is thereby achieved that the shielding to mobile phone signal, improves the practicability of system.
Detailed description of the invention
Fig. 1 is a kind of interference information screen method flow chart for concerning security matters region of the present invention；
Fig. 2 is a kind of interference information shielding harness structure chart for concerning security matters region of the present invention.
Specific embodiment
The present invention is described further below in conjunction with attached drawing:
In figure:
Scanning signal is modulated to CDMA, GSM and PHS downstream frequency through voltage controlled oscillation respectively and interfered accordingly by S101-
Fundamental frequency；
S102- will interfere fundamental frequency by power amplification formed swept-frequency signal in the form of radio wave from low frequency to high frequency successively
Emit and scan to air-launched respectively；
If S103- swept-frequency signal acts in power bracket；
No net state is in S104- power bracket；
If S105- swept-frequency signal disappears；
S106- restores normal condition；
1- Saw-tooth Signal Waveform Generator；2- phase inverter；3- voltage controlled oscillator；4- power amplifier；5- transmitting antenna；
Embodiment:
The present embodiment: as shown in Figure 1, a kind of interference information screen method for concerning security matters region, comprising:
Scanning signal is modulated to CDMA, GSM and PHS downstream frequency through voltage controlled oscillation respectively and interferes fundamental frequency accordingly
S101；
Interference fundamental frequency is formed swept-frequency signal by power amplification successively to distinguish in the form of radio wave from low frequency to high frequency
Emit to air-launched and scans S102；
If swept-frequency signal acts on the S103 in power bracket, no net state S104 is in power bracket；
If swept-frequency signal disappearance S105, restores normal condition S106.
It is done accordingly since scanning signal is modulated to CDMA, GSM and PHS downstream frequency through voltage controlled oscillation by use respectively
Disturb fundamental frequency；Will interference fundamental frequency by power amplification formation swept-frequency signal in the form of radio wave from low frequency to high frequency successively respectively to
Air-launched emits and scans；If swept-frequency signal acts in power bracket, no net state is in power bracket；If sweeping
Frequency blackout, then restore normal condition, since the scanning signal generated by sawtooth signal is after phase inverter paraphase, enters
Voltage controlled oscillator modulation, on identical three wave bands of CDMA, GSM, PHS downstream frequency, the scanning signal of modulation passes through function
After rate amplifier amplification, the size of the power of power amplifier is controlled by voltage-stabiliser tube, its transmission power is made to be less than 1W, amplification
Swept-frequency signal afterwards, to air-launched, will form in the form of radio wave because swept-frequency signal receives in message signals in mobile phone
Messy code interference, the normal microblogging signal data issued from base station cannot be detected so as to cause mobile phone, so that in a certain range
Prevent mobile phone from detecting the normal microblogging signal data of base station sending, prevent preventing mobile phone from carrying out with base station in a certain range
Connection, this be mobile phone will appear search network, no signal, without service system phenomena such as, therefore, to reach the mesh of No Mobile Phones
, due to being modulated to above identical three wave bands of CDMA, GSM, PHS downstream frequency, the locking of frequency range is reduced in this way,
It is scanned accordingly, with respect to all band, reduces scanning range and intensity, therefore, greatly reduce electromagnetic radiance, reduce
Influence of the electromagnetic radiation to human body.
If being in no net state in power bracket due to using swept-frequency signal to act in power bracket；If frequency sweep
Blackout then restores normal condition, when sphere of action due to leaving shielding device when mobile phone, and can restore normal use,
Due to controlling the regionality of shielding covering, it ensure that the shield effectiveness of concerning security matters region part, greatly reduce the function of shielding device
Consumption.
The interference information screen method further includes duration limitation；
Duration limitation: if swept-frequency signal transmitting is for 20 seconds, stops emitting swept-frequency signal and judge power bracket
Inside whether there is liaison, if whether there is liaison in power bracket, swept-frequency signal emits again, otherwise, not will do it
Swept-frequency signal transmitting.
Due to being limited using the duration: if swept-frequency signal transmitting is for 20 seconds, stopping emitting swept-frequency signal and judge
Whether there is liaison in power bracket, if whether there is liaison in power bracket, swept-frequency signal emits again, otherwise,
It not will do it swept-frequency signal transmitting, since this method further includes increasing time restriction in the design, i.e., after interference starting after 20s,
Interference module is closed, and shielding device reenters detecting state, is monitored to liaison next time, is being monitored to lead to again
Before letter contact, interference module is not starting, which not only reduces injury of the electromagnetic radiation to human body in interference range,
The power consumption for reducing shielding device simultaneously is truly realized the purpose of environmental protection shielding.
The swept-frequency signal, which is acted on, not to be influenced base station normal work nearby in power bracket and does not influence to other electricity
Gas equipment forms interference.
Since using the swept-frequency signal data exchange will not be formed with any equipment, the electricity issued due to Mobile phone screen covert
Signal is undoubtedly a kind of electromagnetic signal, but this shielding never has any equipment and carries out data exchange with it, also just forever
Jump signal can not be far formed, to sum up, this signal is used in the state of opposing stationary, it will not be to other electrical equipments
Interference is formed, to human body and harmless.
The scanning signal is sawtooth signal.
The transmission power of the swept-frequency signal is less than 1W.
The swept-frequency signal will not form data exchange with any equipment.
The no net state includes without search network, no signal and without service.
A kind of interference information shielding harness for concerning security matters region, comprising: Saw-tooth Signal Waveform Generator 1, phase inverter 2, pressure
Control oscillator 3, power amplifier 4, transmitting antenna 5；
The Saw-tooth Signal Waveform Generator 1 is used to occur the swept-frequency signal of sawtooth signal；
The phase inverter 2 is for will be output in voltage controlled oscillator 3 after swept-frequency signal paraphase；
The voltage controlled oscillator 3 is used to the swept-frequency signal of paraphase being modulated to CDMA, GSM and PHS downstream frequency respectively
Corresponding interference fundamental frequency；
The power amplifier 4 will be for that will interfere base band power to amplify and be output in transmitting antenna 5；
The transmitting antenna 5 is for successively being emitted and being swept to air-launched respectively from low frequency to high frequency in the form of radio wave
If retouching and swept-frequency signal acting on the S103 in power bracket, it is in no net state S104 in power bracket, if swept-frequency signal
Disappearance S105 then restores normal condition S106.
The output of Saw-tooth Signal Waveform Generator 1 is connected to phase inverter 2, and the output of phase inverter 2 is connected to voltage controlled oscillation
Device 3, the output of voltage controlled oscillator 3 are connected to power amplifier 4, and the output of power amplifier 4 is connected to transmitting antenna 5.
The hunting range of the voltage controlled oscillator 3 is 700MHz~2000MHz.
Meanwhile also providing a kind of interference information shielding harness for concerning security matters region, comprising: Saw-tooth Signal Waveform Generator,
Phase inverter, voltage controlled oscillator, power amplifier, transmitting antenna；Since the structure of cellular phone signal shielding device can be divided into sawtooth wave
Generator circuit, voltage-controlled oscillator circuit (VCO), RF power amplification circuit and this four part of antenna, cellular phone signal shielding device is logical
Sawtooth wave caused by saw-toothed wave generator is crossed to control voltage controlled oscillator running, essence generates the swept-frequency signal of working frequency,
Each frequency sweep cycle is equal in each of working frequency range frequency point, each frequency point increases a broad pulse (sawtooth
Caused by wave trace) and a burst pulse (caused by sawtooth wave flyback), letter can be changed by adjusting R and C in voltage controlled oscillator
The signal frequency that number shielding device is issued, so that the band limits that signal shielding device is shielded is controlled, by sawtooth wave to voltage-controlled
Oscillator (VCO) output dominant frequency is controlled in the radiation signal of down going channel, and is carried out by RF power amplification to radiofrequency signal
Amplification, it is thereby achieved that the shielding to mobile phone signal, improves the practicability of system.
Working principle:
This patent is corresponding by the way that scanning signal to be modulated to CDMA, GSM and PHS downstream frequency respectively through voltage controlled oscillation
Interfere fundamental frequency；Interference fundamental frequency is formed swept-frequency signal by power amplification successively to distinguish in the form of radio wave from low frequency to high frequency
Emit to air-launched and scans；If swept-frequency signal acts in power bracket, no net state is in power bracket；If
Swept-frequency signal disappears, then restores normal condition, since the scanning signal generated by sawtooth signal is after phase inverter paraphase, into
Enter voltage controlled oscillator modulation, on identical three wave bands of CDMA, GSM, PHS downstream frequency, the scanning signal of modulation is passed through
After power amplifier amplification, the size of the power of power amplifier is controlled by voltage-stabiliser tube, so that its transmission power is less than 1W, is put
Swept-frequency signal after big in the form of radio wave to air-launched because receive in mobile phone can shape in message signals for swept-frequency signal
It is interfered at messy code, the normal microblogging signal data issued from base station cannot be detected so as to cause mobile phone, so that in a certain range
Inside prevent mobile phone from detect base station sending normal microblogging signal data, prevent prevent in a certain range mobile phone from base station into
Row connection, this be mobile phone will appear search network, no signal, without service system phenomena such as, therefore, to reach the mesh of No Mobile Phones
, due to being modulated to above identical three wave bands of CDMA, GSM, PHS downstream frequency, the locking of frequency range is reduced in this way,
It is scanned accordingly, with respect to all band, reduces scanning range and intensity, the present invention solves the prior art and exists due to its electromagnetism
Radiate high-power big, the problem of influence so as to cause electromagnetic radiation to human body, having reduces electromagnetic radiation to the shadow of human body
Power consumption, the beneficial skill for the purpose that the formation of other electrical equipments will not be interfered, realize environmental protection shielding rung, reduce shielding device
Art effect.
Using technical solution of the present invention or those skilled in the art under the inspiration of technical solution of the present invention, design
Similar technical solution out, and reach above-mentioned technical effect, it is to fall into protection scope of the present invention.
Claims (10)
1. a kind of interference information screen method for concerning security matters region characterized by comprising
Scanning signal is modulated to CDMA, GSM and PHS downstream frequency through voltage controlled oscillation respectively and interferes fundamental frequency accordingly；
Will interference fundamental frequency by power amplification formation swept-frequency signal in the form of radio wave from low frequency to high frequency successively respectively to sky
Middle transmitting emits and scans；
If swept-frequency signal acts in power bracket, no net state is in power bracket；
If swept-frequency signal disappears, restore normal condition.
2. a kind of interference information screen method for concerning security matters region according to claim 1, which is characterized in that described dry
Disturbing information screen method further includes duration limitation；
Duration limitation: if swept-frequency signal transmitting it is for 20 seconds, stop emit swept-frequency signal and judge be in power bracket
No to have liaison, if whether there is liaison in power bracket, swept-frequency signal emits again, otherwise, not will do it frequency sweep
Signal transmitting.
3. a kind of interference information screen method for concerning security matters region according to claim 1, which is characterized in that described to sweep
Frequency signal function base station near not influencing in power bracket works normally and does not influence to form other electrical equipments and interferes.
4. a kind of interference information screen method for concerning security matters region according to claim 1, which is characterized in that described to sweep
Retouching signal is sawtooth signal.
5. a kind of interference information screen method for concerning security matters region according to claim 1, which is characterized in that described to sweep
The transmission power of frequency signal is less than 1W.
6. a kind of interference information screen method for concerning security matters region according to claim 1, which is characterized in that described to sweep
Frequency signal will not form data exchange with any equipment.
7. a kind of interference information screen method for concerning security matters region according to claim 1, which is characterized in that the nothing
Net state includes without search network, no signal and without service.
8. a kind of interference information shielding harness for concerning security matters region characterized by comprising Saw-tooth Signal Waveform Generator falls
Phase device, voltage controlled oscillator, power amplifier, transmitting antenna；
The Saw-tooth Signal Waveform Generator is used to occur the swept-frequency signal of sawtooth signal；
The phase inverter is for will be output in voltage controlled oscillator after swept-frequency signal paraphase；
The voltage controlled oscillator is used to the swept-frequency signal of paraphase being modulated to CDMA, GSM and PHS downstream frequency respectively corresponding
Interfere fundamental frequency；
The power amplifier will be for that will interfere base band power to amplify and be output in transmitting antenna；
The transmitting antenna for successively emitted respectively to air-launched in the form of radio wave from low frequency to high frequency and scan and
If swept-frequency signal acts in power bracket, it is in no net state in power bracket, if swept-frequency signal disappears, restores just
Normal state.
9. a kind of interference information shielding harness for concerning security matters region according to claim 1, which is characterized in that the saw
The output of tooth wave generator is connected to phase inverter, and the phase inverter output is connected to voltage controlled oscillator, the voltage controlled oscillator
Output is connected to power amplifier, and the power amplifier output is connected to transmitting antenna.
10. a kind of interference information shielding harness for concerning security matters region according to claim 1, which is characterized in that described
The hunting range of voltage controlled oscillator is 700MHz~2000MHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811350397.1A CN109347595A (en) | 2018-11-14 | 2018-11-14 | A kind of interference information screen method and shielding harness for concerning security matters region |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811350397.1A CN109347595A (en) | 2018-11-14 | 2018-11-14 | A kind of interference information screen method and shielding harness for concerning security matters region |
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| Publication Number | Publication Date |
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| CN109347595A true CN109347595A (en) | 2019-02-15 |
Family
ID=65315248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811350397.1A Pending CN109347595A (en) | 2018-11-14 | 2018-11-14 | A kind of interference information screen method and shielding harness for concerning security matters region |
Country Status (1)
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| CN (1) | CN109347595A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110572235A (en) * | 2019-09-16 | 2019-12-13 | 浙江三维通信科技有限公司 | Signal shielding device and method |
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Application publication date: 20190215 |