CN103731229A - Method for shielding wireless signal - Google Patents
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Abstract
The embodiment of the invention discloses a method for shielding a wireless signal. The method includes the steps that (1) a monitoring unit receives a user instruction, wherein the user instruction is a modification instruction or an inquiry instruction; (2) the monitoring unit judges the user instruction, if the user instruction is the inquiry instruction, shielding parameters are fed back to a user, and if the user instruction is the modification instruction, the monitoring unit judges whether the modification instruction is in a manual control mode or an automatic control mode, if the modification instruction is in the manual control mode, a manual control process is started, a power control signal is transmitted to multiple frequency band shielding units, and if the modification instruction is in the automatic control mode, an automatic control process is started, and the power control signal is transmitted to the multiple frequency band shielding units; (3) the frequency band shielding units radiate shielding signals in multiple frequency bands according to the power control signal. According to the method, the shielding signals can be flexibly controlled, a wireless signal shielding device can be monitored in real time, the power level of the wireless signal shielding device can be accurately adjusted, dynamic upgrading can be achieved, wireless signals possibly occurring in the future can be shielded, and the signal shielding effect can be optimized.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of radio signal shielding method.
Background technology
Along with the high speed development of wireless communication technology, the terminal such as mobile phone, intercom is convenient, fast with it, not be popular with the masses of users by the many advantages such as time and site limitation, its number of users constantly increases, and becomes gradually one of instrument indispensable in people's daily life and work.When wireless communication technology offers convenience to people, also brought negative impact, as utilized Wireless Telecom Equipment to practise fraud, steal privacy of user, mobile phone noise jamming etc.Therefore,, in many occasions, people wish at the various wireless signals of a certain region inner shield.For example, the wireless signal in shielding examination hall, with the possibility of stopping to practise fraud by radio, safeguards the fairness of examination; Shielding momentous conference indoor wireless signal, leaks state secrets preventing; The wireless signal of the special occasions such as shielding court, prison, to prevent the generation etc. of various fortuitous events.
Existing radio signal shielding device all adopts traditional radio signal shielding method, the frequency range of disturbing for need, the high-power interference signal of radiation, really alleviated to a certain extent as the problem of examination hall cheating and so on, but also there is following defect: long-term radiation high-power signal, do not meet electromagenetic wave radiation sanitary standard, affect health; Radiation signal power cannot be adjusted as required, and shield ranges is excessive, affects the normal operation of radio communication outside blind zone; The radiation-screening power that only has product to be fixedly installed, the variation that cannot conform; Only have the shielding that product is fixedly installed to cover frequency range, cannot meet the demand of communication technology upgrading, cannot shield the wireless signal frequency that may occur future; Do not possess the function of long-distance on-line remote monitoring, cannot manage concentratedly, make overall signal shielding effect not very good.
Summary of the invention
Technical problem to be solved by this invention is, a kind of radio signal shielding method is provided, can be according to electromagnetic wave environmental information, adjustment radiant power, to meet electromagenetic wave radiation standard-required, solution is to Health Impact problem and shield ranges problems of too, and the variation that also can automatically conform, according to need for environment radiation shield signal simultaneously; Can monitor in real time, remote switch radio signal shielding device, the power grade of accurate adjustment radio signal shielding device, to solve equipment control and overall signal shielding effect problem; Can dynamic update, the following wireless signal that may occur of shielding, optimizes signal shielding effect, to solve the problem that traditional screen method cannot flexible expansion; Automatic control is provided and manually controls two kinds of patterns, the control flexibility that greatly improves wireless shielding signal.
For solving above technical problem, the embodiment of the present invention provides a kind of radio signal shielding method, comprising:
S1, monitoring unit receive user instruction, and described user instruction is modify instruction or query statement;
S2, described monitoring unit judge described user instruction;
When described user instruction is query statement, according to described query statement to user feedback shielding parameter;
When described user instruction is modify instruction, according to described modify instruction, the pattern that judges described user instruction is manual control model or automatic control mode;
If manually control model, enters manual control flow, according to described modify instruction, revise the shielding parameter in memory, and to multiple frequency range screen units, send power control signal according to amended shielding parameter;
If automatic control mode, enters automatic control flow chart, according to the ambient signal parameter of described modify instruction and the detection of advance signal detecting unit, from the multiple frequency range screen units of trend, send power control signal;
S3, described multiple frequency range screen units are according to the shielded signal of the multiple frequency ranges of described power control signal radiation.
Further, before described step S1, also comprise:
Local administration center module sends a connection request to described monitoring unit, connects with described monitoring unit;
The user instruction that described local administration center module is sent local user sends described monitoring unit to.
Further, before described step S1, also comprise:
Telemanagement center module sends a connection request to described monitoring unit, connects with described monitoring unit;
The user instruction that described telemanagement center module is sent long-distance user sends described monitoring unit to.
Further, described step S2 specifically comprises:
S201, described monitoring unit initialization, arrange the basic parameter in memory, and described basic parameter comprises shielding parameter, username and password;
S202, circular wait user instruction;
S203, receive described user instruction, resolve the URL character string of described user instruction;
S204, according to described URL character string, judge that described user instruction is query statement or modify instruction, if described user instruction is query statement, perform step S205, if described user instruction is modify instruction, perform step S206;
S205, read the shielding parameter in described memory, and send a reply instruction to user according to the shielding parameter in described memory, and return to step S202;
S206, obtain the username and password in described URL character string, and read the username and password in described memory;
S207, authenticate the username and password in described URL character string, whether with described memory in username and password match, if coupling performs step S208, if do not mate, abandon described user instruction, and return to step S202;
S208, according to described URL character string, judge that described user job pattern is manual control model or automatic control mode, if described user job pattern is manual control model, performs step S209, if described user job pattern is automatic control mode, perform step S210;
S209, enter manual control flow;
S210, enter automatic control flow chart.
Further, described step S209 specifically comprises:
S2091: continue to resolve described URL character string, obtain the shielding parameter in described URL character string;
S2092: the shielding parameter in described memory is modified, be revised as the shielding parameter in described URL character string, and according to the control word of amended shielding parameter, to the shielding subelement corresponding with described control word in described multiple frequency range screen units, send power control signal;
S2093: read the shielding parameter in described memory, and send a reply instruction to user according to the shielding parameter in described memory, and return to step S202.
Further, described step S210 specifically comprises:
S2101: read the ambient signal parameter that advance signal detecting unit detects, described ambient signal parameter comprises power parameter K and frequency parameter F;
S2102: continue to resolve described URL character string, obtain the customer requirement shielding parameter in described URL character string, described shielding parameter comprises screening range D and environmental parameter E;
S2103: described power parameter K, described frequency parameter F, described environmental parameter E and described screening range D be according to power control computational methods, generating power control parameters C;
S2104: the shielding parameter in described memory is modified, be revised as the corresponding shielding parameter of power contorl parameters C, and according to the control word of amended shielding parameter, to the shielding subelement corresponding with described control word in described multiple frequency range screen units, send power control signal;
S2105: read the shielding parameter in described memory, and send a reply instruction to user according to the shielding parameter in described memory;
S2106: judge whether send successfully, if so, return to step S202 if replying instruction, otherwise continue execution step S2107;
S2107: whether the changing value that judges described power parameter K exceedes power parameter thresholding A, if so, returns to step S2102, otherwise returns to step S2106.
The radio signal shielding method that the embodiment of the present invention provides, there is following beneficial effect: can be according to environmental electromagnetic wave signal power, carry out shielded signal and automatically control, to meet electromagenetic wave radiation standard-required, solve Health Impact problem and shield ranges problems of too; Manual control model is provided, can, by user according to environmental requirement, sets voluntarily shielded signal power, meet the requirement of controlling flexibility; Telemanagement center module is connected with the monitoring unit in shielding device by the Internet, can monitor in real time and remote switch shielding device; The shielding subelement of multiple different capacity grades can realize shielding device shielding power accurately adjustable; Extended frequency band screen unit is expanded existing shielding frequency range, realizes system dynamic update, the wireless signal that maskable may occur future; Shielding device series connection networking, can centralized control, optimizes overall signal shield effectiveness.
Accompanying drawing explanation
Fig. 1 is an example structure schematic diagram that is applicable to radio signal shielding system of the present invention.
Fig. 2 is the structural representation of the multiple frequency range screen units in embodiment illustrated in fig. 1.
Fig. 3 is the structural representation of the shielding subelement in embodiment illustrated in fig. 2.
Fig. 4 is the schematic flow sheet of an embodiment of radio signal shielding method provided by the invention.
Fig. 5 is the schematic flow sheet of the monitoring unit work in embodiment illustrated in fig. 4.
Fig. 6 is the schematic flow sheet of the manual control model in embodiment illustrated in fig. 5.
Fig. 7 is the schematic flow sheet of the automatic control mode in embodiment illustrated in fig. 5.
Fig. 8 is the schematic flow sheet of the generating power control parameters C in embodiment illustrated in fig. 7.
Fig. 9 is another example structure schematic diagram that is applicable to radio signal shielding system of the present invention.
Figure 10 is another example structure schematic diagram that is applicable to radio signal shielding system of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described.
The invention provides a kind of radio signal shielding method, can be applied in radio signal shielding system, can control flexibly shielded signal, monitoring, remote switch radio signal shielding device in real time, the power grade of accurate adjustment radio signal shielding device, can dynamic update, the following wireless signal that may occur of shielding, optimizes signal shielding effect.
Referring to Fig. 1, it is the structural representation that is applicable to an embodiment of radio signal shielding system of the present invention.
The present embodiment provides a kind of radio signal shielding system, comprises shielding device 107, and to shielding device 107, sends the administration module 100 of user instruction.Wherein, administration module 100 comprises telemanagement center module 101 and local administration center module 102.Shielding device 107 comprises monitoring unit 103, multiple frequency range screen unit 104 and advance signal detecting unit 105.
Local administration center module 102 sends monitoring unit 103 to for modify instruction and query statement that local user is sent, and receives the shielding parameter that monitoring unit 103 feeds back;
Advance signal detecting unit 105 is for automatic testing environment electromagnetic wave, and preserves ambient signal parameter;
Multiple frequency range screen units 104 are for received power control signal, and according to power control signal radiation shield signal.
Wherein, the output of telemanagement center module 101 is connected with the input of monitoring unit 103, the output of local administration center module 102 is connected with the input of monitoring unit 103, the output of advance signal detecting unit 105 is connected with the input of monitoring unit 103, and the output of monitoring unit 103 is connected with the input of multiple frequency range screen units 104.
Further, shielding device also comprises power supply 106.
Further, as shown in Figure 2, multiple frequency range screen units 104 comprise:
Fixed frequency range screen unit 201, is more than or equal to 50MHz for shielding, and is less than or equal to 2500MHz frequency range; With,
Extended frequency band screen unit 202, for shielding the frequency range beyond 50MHz～2500MHz frequency range.
Further, fixed frequency range screen unit 201 comprises at least one shielding subelement 203, and extended frequency band screen unit 202 comprises at least one shielding subelement 203.
As shown in Figure 3, shielding subelement 203 specifically comprises:
VCO controller 301, for transmission frequency control signal;
Voltage controlled oscillator 302, for receive frequency control signal, and according to frequency control signal frequency modulation, output FM signal;
Power attenuator 303, for received power control signal and FM signal, and according to the watt level of power control signal adjustment FM signal, power output signal;
Power amplifier 304, for received power signal, and amplifies power signal output high-power signal;
Radio-frequency filter 305, for receiving high-power signal, and carries out filtering to high-power signal, output shielded signal; With,
Antenna 306, for receiving shielded signal, and radiate shielded signal.
VCO controller 301 is controlled the operating frequency of voltage controlled oscillator 302, makes voltage controlled oscillator 302 that grading shield signal source is provided.The pad value of monitoring unit 103 power ratio control attenuators 303, makes to shield device 107 and can export the power of different brackets.By multichannel voltage controlled oscillator 302 is arranged to different frequency levels, power attenuator 303 is arranged to different power grades, the shielded signal that antenna 306 gives off is mutually connected on frequency domain, form comprehensive, full frequency band, power flexibly adjustable shielding cover.
Referring to Fig. 4, it is the schematic flow sheet of an embodiment of radio signal shielding method provided by the invention.
The invention provides a kind of radio signal shielding method, be applicable to the radio signal shielding system in above-described embodiment, the method comprises:
S1, monitoring unit 103 receive user instruction, and user instruction is modify instruction or query statement;
S2, monitoring unit 103 judge user instruction;
When user instruction is query statement, according to query statement to user feedback shielding parameter;
When user instruction is modify instruction, according to modify instruction, the pattern that judges user instruction is manual control model or automatic control mode;
If manually control model, enters manual control flow, according to modify instruction, revise the shielding parameter in memory, and to multiple frequency range screen units 104, send power control signal according to amended shielding parameter;
If automatic control mode, enters automatic control flow chart, according to modify instruction and advance signal detecting unit, detect 105 ambient signal parameter, from the multiple frequency range screen units 104 of trend, send power control signal;
S3, multiple frequency range screen unit 104 are according to the shielded signal of the multiple frequency ranges of power control signal radiation.
Further, before step S1, also comprise:
Local administration center module 102 sends a connection request to monitoring unit, connects with monitoring unit 103;
The user instruction that local administration center module 102 is sent local user sends monitoring unit 103 to.
Further, before step S1, also comprise:
The user instruction that telemanagement center module 101 is sent long-distance user sends monitoring unit 103 to.
Further, as shown in Figure 5, step S2 specifically comprises:
S201, monitoring unit 103 initialization, arrange the basic parameter in memory, and basic parameter comprises shielding parameter, username and password;
S202, circular wait user instruction;
S203, reception user instruction, the URL character string of parsing user instruction;
S204, according to URL character string, judge that user instruction is query statement or modify instruction, if user instruction is query statement, perform step S205, if user instruction is modify instruction, perform step S206;
S205, read the shielding parameter of shielding in device, and send a reply instruction to user according to the shielding parameter in memory, and return to step S202;
S206, obtain the username and password in URL character string, and the username and password in read memory;
Username and password in S207, authentication URL character string, whether with memory in username and password match, if coupling performs step S208, if do not mate, abandon user instruction, and return to step S202;
S208, according to URL character string, judge that user job pattern is manual control model or automatic control mode, if user job pattern is manual control model, perform step S209, if user job pattern is automatic control mode, perform step S210;
S209, enter manual control flow;
S210, enter automatic control flow chart.
Further, as shown in Figure 6, step S209 specifically comprises:
S2091: continue to resolve URL character string, obtain the shielding parameter in URL character string;
S2092: the shielding parameter in memory is modified, be revised as the shielding parameter in URL character string, and according to the control word of amended shielding parameter, to the shielding subelement 203 corresponding with control word in multiple frequency range screen units 104, send power control signal;
S2093: the shielding parameter in read memory, and send a reply instruction to user according to the shielding parameter in memory, and return to step S202.
When revising shielding parameter, monitoring unit 103 compares the control word of the control word in shielding parameter and each shielding subelement 203, selects to have the shielding subelement 203 of identical control word, and sends a power control signal to this shielding subelement 203.Power control signal is power attenuation value, can control the power that shielding subelement 203 is exported, thereby give off the shielded signal corresponding with shielding parameter.
Further, as shown in Figure 7, step S210 specifically comprises:
S2101: read the ambient signal parameter that advance signal detecting unit 105 detects, ambient signal parameter comprises power parameter K and frequency parameter F;
S2102: continue to resolve URL character string, obtain the customer requirement shielding parameter in URL character string, comprise screening range D and environmental parameter E; If need to resolve without URL character string, directly call the screening range D and the environmental parameter E that have been kept in memory;
S2103: power parameter K, frequency parameter F, environmental parameter E and screening range D be according to power control computational methods, generating power control parameters C;
S2104: the shielding parameter in memory is modified, be revised as the corresponding shielding parameter of power contorl parameters C, and according to the control word of amended shielding parameter, to the shielding subelement 203 corresponding with control word in multiple frequency range screen units 104, send power control signal;
S2105: the shielding parameter in read memory, and send a reply instruction to user according to the shielding parameter in memory;
S2106: judge that whether reply instruction sends successfully, if so, returns to step S202; Otherwise continue execution step S2107;
S2107: be switched to signal detection mode, judge whether the changing value of ambient signal power parameter K exceedes power parameter thresholding A, if so, return to step S2102; If not, switch letter in reply mask pattern, and return to step S2106.
Power parameter thresholding A determines according to the empirical value of different mode.Generally, the value of power parameter thresholding A is 5dB.But also can carry out certain optimizing and revising according to environmental requirement.
It should be noted that, user can need or environmental requirement according to self, selects voluntarily mode of operation.Wherein, automatic operation mode, according to environmental electromagnetic wave signal power, is carried out shielded signal and is automatically controlled, and to meet electromagenetic wave radiation standard-required, solves Health Impact problem and shield ranges problems of too; Manually control model, can, by user according to environmental requirement, set shielded signal power voluntarily, meets the requirement of controlling flexibility.
Particularly, automatic control mode comprises signal detection mode and signal shielding pattern, when shielding device 107 is operated in signal detection mode, only has advance signal detecting unit 105 reception environment signals, multiple frequency range screen unit 104 non-radiating shielded signals; When shielding device 107 is operated in signal shielding pattern, only have multiple frequency range screen unit 104 radiation shield signals, advance signal detecting unit 105 quits work.
Further, as shown in Figure 8, step S2103 specifically comprises:
S21031: according to environmental parameter E, select signal propagation model i;
S21032: by frequency parameter F and distance parameter D substitution signal propagation model i, calculate path loss parameter L;
S21033: according to frequency parameter F, select the minimum signal to noise ratio of signal propagation model i to require S and signal to noise ratio surplus parameter M;
S21034: output power parameters C is that power parameter K, path loss L, minimum signal to noise ratio require S and signal to noise ratio surplus M sum.
Environmental parameter E can be room parameter, outdoor parameter or other parameters, and signal propagation model i is corresponding to all-environment model.For example, when environmental parameter E is indoor environment parameter, signal propagation model i is free space signal propagation model.Free space signal propagation model is that the Friis Emission Formula proposing in nineteen forty-six based on American scientist H.T.Friis is derived, and Friis Emission Formula is as follows:
Wherein, P
tfor transmitter power; P
rfor received power, G
tfor transmitter antenna gain; G
rfor receiver antenna gain; R is the spacing distance between transmitter and receiver, and unit is rice; λ is wavelength, and unit is rice.
The computing formula of free space signal propagation model is as follows:
L＝-27.6+20logF+20logD
Wherein, L is shielded signal propagation path loss, and unit is dB.
F is carrier frequency, and unit is MHz.
D is screening range, and unit is rice.
In addition, user can also be by sending modify instruction, for revising title, description, mode of operation, IP address, mask subnet mask, the gateway of radio signal shielding device, username and password.User can also be by sending query statement, for title, description, IP address, mask subnet mask, gateway, update time last time, operating state, cpu temperature, CPU operating voltage and the air themperature of inquiry radio signal shielding device.
In the middle of concrete enforcement, radio signal shielding system provided by the invention can comprise multiple shielding devices 107.For example, as shown in Figure 9, radio signal shielding system comprises telemanagement center module 101, local administration center module 102, shielding device A1, shielding device A2, shielding device A3 ... with shielding device An.Telemanagement center module 101 by the Internet respectively with shielding device A1, shielding device A2, shielding device A3 ... An is connected with shielding device, local administration center module 102 by the Internet respectively with shielding device A1, shielding device A2, shielding device A3 ... An is connected with shielding device, make telemanagement center module 101 and each shielding device of local administration center module 102 centralized monitors, the required shielded signal of shielding device radiation user.
Referring to Figure 10, it is another example structure schematic diagram that is applicable to radio signal shielding system of the present invention.
The present embodiment provides a kind of radio signal shielding system, comprises multiple shielding devices 107, local administration center module 102 and telemanagement center module 101.Wherein, local administration center module 102 comprises local control interface 702 and local data base 701, and local background program 703 is installed.Telemanagement center module 101 comprises Long-distance Control interface 704 and remote data base 706, and long-range background program 705 is installed.
Local user is sent the control flow of modify instruction and query statement below, and the control flow that long-distance user sends modify instruction and query statement is elaborated.
One, it is as follows that local user sends the control flow of query statement:
Local user sends local search instruction by control interface, this locality 702 to local background program 703;
Two, it is as follows that local user sends the control flow of modify instruction:
Local user sends local modify instruction by control interface, this locality 702 to local background program 703;
Three, it is as follows that long-distance user sends the control flow of query statement:
Long-distance user sends remote inquiry instruction by Long-distance Control interface 704 to long-range background program 705;
Long-range background program 705 sends remote inquiry instruction to shielding device 107;
Long-range background program 705 is saved in remote data base 706 by shielding parameter, and is shown to remote subscriber interface 704.
Four, it is as follows that long-distance user sends the control flow of modify instruction:
Long-distance user sends remotely modifying instruction by Long-distance Control interface 704 to long-range background program 705;
Long-range background program 705 sends remotely modifying instruction to shielding device 107;
Long-range background program 705 is saved in remote data base 706 by amended shielding parameter, and is shown to remote subscriber interface 704.
The radio signal shielding method that the embodiment of the present invention provides, can be according to electromagnetic wave environmental information, adjustment radiant power, to meet electromagenetic wave radiation standard-required, solution is to Health Impact problem and shield ranges problems of too, the variation that simultaneously also can automatically conform, according to need for environment radiation shield signal; Can monitor in real time, remote switch radio signal shielding device, the power grade of accurate adjustment radio signal shielding device, to solve equipment control and overall signal shielding effect problem; Can dynamic update, the following wireless signal that may occur of shielding, optimizes signal shielding effect, to solve the problem that traditional screen method cannot flexible expansion; Automatic control is provided and manually controls two kinds of patterns, the control flexibility that greatly improves wireless shielding signal.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (9)
1. a radio signal shielding method, is characterized in that, comprising:
S1, monitoring unit receive user instruction, and described user instruction is modify instruction or query statement;
S2, described monitoring unit judge described user instruction;
When described user instruction is query statement, according to described query statement to user feedback shielding parameter;
When described user instruction is modify instruction, according to described modify instruction, the pattern that judges described user instruction is manual control model or automatic control mode;
If manually control model, enters manual control flow, according to described modify instruction, revise the shielding parameter in memory, and to multiple frequency range screen units, send power control signal according to amended shielding parameter;
If automatic control mode, enters automatic control flow chart, according to the ambient signal parameter of described modify instruction and the detection of advance signal detecting unit, from the multiple frequency range screen units of trend, send power control signal;
S3, described multiple frequency range screen units are according to the shielded signal of the multiple frequency ranges of described power control signal radiation.
2. radio signal shielding method according to claim 1, is characterized in that, described step S2 specifically comprises:
S201, described monitoring unit initialization, arrange the basic parameter in memory, and described basic parameter comprises shielding parameter, username and password;
S202, circular wait user instruction;
S203, receive described user instruction, resolve the URL character string of described user instruction;
S204, according to described URL character string, judge that described user instruction is query statement or modify instruction, if described user instruction is query statement, perform step S205, if described user instruction is modify instruction, perform step S206;
S205, read the shielding parameter in described memory, and send a reply instruction to user according to the shielding parameter in described memory, and return to step S202;
S206, obtain the username and password in described URL character string, and read the username and password in described memory;
S207, authenticate the username and password in described URL character string, whether with described memory in username and password match, if coupling performs step S208, if do not mate, abandon described user instruction, and return to step S202;
S208, according to described URL character string, the pattern that judges described user instruction is manual control model or automatic control mode, if manual control model performs step S209, if automatic control mode performs step S210;
S209, enter manual control flow;
S210, enter automatic control flow chart.
3. radio signal shielding method according to claim 2, is characterized in that, described step S209 specifically comprises:
Described URL character string is resolved in S2091, continuation, obtains the shielding parameter in described URL character string;
S2092, the shielding parameter in described memory is modified, be revised as the shielding parameter in described URL character string, and according to the control word of amended shielding parameter, to the shielding subelement corresponding with described control word in described multiple frequency range screen units, send power control signal;
S2093, read the shielding parameter in described memory, and send a reply instruction to user according to the shielding parameter in described memory, and return to step S202.
4. radio signal shielding method according to claim 2, is characterized in that, described step S210 specifically comprises:
S2101, read advance signal detecting unit detect ambient signal parameter, described ambient signal parameter comprises power parameter K and frequency parameter F;
Described URL character string is resolved in S2102, continuation, obtains the shielding parameter in described URL character string, and described shielding parameter comprises screening range D and environmental parameter E;
S2103, described power parameter K, described frequency parameter F, described environmental parameter E and described screening range D be according to power control computational methods, generating power control parameters C;
S2104, the shielding parameter in described memory is modified, be revised as the corresponding shielding parameter of power contorl parameters C, and according to the control word of amended shielding parameter, to the shielding subelement corresponding with described control word in described multiple frequency range screen units, send power control signal;
S2105, read the shielding parameter in described memory, and send a reply instruction to user according to the shielding parameter in described memory;
S2106, judge reply instruction whether send successfully, if so, return to step S202, otherwise continue execution step S2107;
S2107, judge whether the changing value of described power parameter K exceedes power parameter thresholding A, if so, returns to step S2102, if not, returns to step S2106.
5. radio signal shielding method according to claim 4, is characterized in that, the power control computational methods in described step S2103 specifically comprise:
S21031: according to described environmental parameter E, select signal propagation model i;
S21032: by signal propagation model i described in described frequency parameter F and described distance parameter D substitution, calculate path loss parameter L;
S21033: according to described frequency parameter F, select the minimum signal to noise ratio of described signal propagation model i to require S and signal to noise ratio surplus parameter M;
S21034: described output power parameters C is that described power parameter K, described path loss L, described minimum signal to noise ratio require S and described signal to noise ratio surplus M sum.
6. radio signal shielding method according to claim 1, is characterized in that, before described step S1, also comprises:
Local administration center module sends a connection request to described monitoring unit, connects with described monitoring unit;
The user instruction that described local administration center module is sent local user sends described monitoring unit to.
7. radio signal shielding method according to claim 1, is characterized in that, before described step S1, also comprises:
Telemanagement center module sends a connection request to described monitoring unit, connects with described monitoring unit;
The user instruction that described telemanagement center module is sent long-distance user sends described monitoring unit to.
8. radio signal shielding method according to claim 1, is characterized in that, described multiple frequency range screen units comprise:
Fixed frequency range screen unit, is more than or equal to 50MHz for shielding, and is less than or equal to 2500MHz frequency range; With,
Extended frequency band screen unit, for shielding the frequency range beyond 50MHz～2500MHz frequency range.
9. radio signal shielding method according to claim 8, is characterized in that, described fixed frequency range screen unit comprises at least one shielding subelement, and described extended frequency band screen unit comprises at least one shielding subelement;
Described shielding subelement specifically comprises:
VCO controller, for output frequency control signal;
Voltage controlled oscillator, for receiving described frequency control signal, and according to described frequency control signal frequency modulation, output FM signal;
Power attenuator, for receiving described power control signal and described FM signal, and adjusts the watt level of described FM signal, power output signal according to described power control signal;
Power amplifier, for receiving described power signal, and amplifies described power signal output high-power signal;
Radio-frequency filter, for receiving described high-power signal, and carries out filtering to described high-power signal, output shielded signal; With,
Antenna, for receiving described shielded signal, and radiate described shielded signal.
Priority Applications (1)
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| CN111682922A (en) * | 2020-04-30 | 2020-09-18 | 山东思正信息科技有限公司 | Portable signal shielding quick networking equipment |
| CN112351132A (en) * | 2020-11-09 | 2021-02-09 | 南京信息职业技术学院 | Mobile phone shielding method |
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