CN206023803U - A kind of micropower intelligent digital orients cellular phone signal shielding device - Google Patents
A kind of micropower intelligent digital orients cellular phone signal shielding device Download PDFInfo
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- CN206023803U CN206023803U CN201621034293.6U CN201621034293U CN206023803U CN 206023803 U CN206023803 U CN 206023803U CN 201621034293 U CN201621034293 U CN 201621034293U CN 206023803 U CN206023803 U CN 206023803U
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Abstract
The utility model discloses a kind of micropower intelligent digital orients cellular phone signal shielding device, including programmable logic array, for producing baseband modulation signal；The digital baseband modulated signal that programmable logic array is produced is converted to analogue signal by the digital to analog converter being connected with programmable logic array；At least one passage being connected with digital to analog converter；Passage includes the attenuator circuit being connected with digital to analog converter, the frequency mixing module being connected with attenuator circuit, local oscillation signal is produced using phase locked source and voltage controlled oscillator, and frequency mixing module is given by local oscillation signal, in the channel needed for being converted to for the intermediate-freuqncy signal after digital to analog converter is changed；The filtration module being connected with frequency mixing module, for being filtered to the signal that frequency mixing module is produced；The amplification module being connected with filtration module, for being amplified to the filtered signal of filtration module；The beam antenna being connected with amplification module, for transmission channel power.This utility model has that shield effectiveness is good, radiate low advantage.
Description
Technical field
This utility model is related to mobile communication and shield technology field, more specifically, more particularly to a kind of micropower intelligence
Can numeral orientation cellular phone signal shielding device.
Background technology
In recent years, mobile communication technology fast development, from 2G, 3G, has gradually had evolved to 4G.Mobile communication technology
Development, greatly advances the popularity rate of smart mobile phone, and the life that the popularization of smart mobile phone gives people brings great convenience,
But at the same time, in some special occasions, these smart mobile phones also become divulges a secret, and the instrument of cheating is hard to guard against.Therefore,
In these special neighborhoods, the application for shielding device just seems necessary.
Shielding device operation principle be：In the channel of operating handset, interference signal is produced so as to None- identified base station
Normal signal, so which cannot carry out proper communication with base station, reaches the effect of shielding.
At present, the technology that shielding device is adopted is usually point frequency frequency sweep mode, produces a point-frequency signal by VCO, in handss
The working channel interior circulation movement of machine, reaches the effect of spectral interference.This method has the disadvantage that, first, the same time,
In working channel, only one of which point is interfered, for the spread spectrum communications such as WCDMA and LTE, interference effect extreme difference, it is impossible to full
Sufficient application requirement；Secondth, it is just the narrow band signals such as GSM, it is also desirable to produce higher power and can be only achieved shield effectiveness, too high
Radiation of power, ill effect can also be produced to human body；3rd, due to the analog device variation with temperature such as VCO, temperature is had
Drift, causes frequency to be forbidden, so as to not reach interference effect；4th, as the method is needed than larger radiant power, power amplifier,
Power supply constant power long term device is operated in full load condition, and stability extreme difference is easily damaged, once damaging, does not just reach interference
Effect, causes to safeguard inconvenience, cost is also high.
Utility model content
The purpose of this utility model is to provide a kind of micropower intelligent digital orientation cellular phone signal shielding device, and which shields effect
Really good, low, reliability height is radiated, the mobile phone signal of each frequency range and standard can be effectively shielded.
In order to achieve the above object, the technical solution adopted in the utility model is as follows：
A kind of micropower intelligent digital orients cellular phone signal shielding device, including：
Programmable logic array, for producing baseband modulation signal；
The digital to analog converter being connected with programmable logic array, the digital baseband for producing programmable logic array are adjusted
Signal processed is converted to analogue signal, and moves intermediate frequency to；
And at least one passage being connected with digital to analog converter；
Each passage includes that the attenuator circuit being connected with digital to analog converter, the frequency mixing module being connected with attenuator circuit are utilized
Phase locked source and voltage controlled oscillator produce local oscillation signal, and give frequency mixing module by local oscillation signal, for changing digital to analog converter
Intermediate-freuqncy signal afterwards is converted in required channel；
The filtration module being connected with frequency mixing module, for being filtered to the signal that frequency mixing module is produced；
The amplification module being connected with filtration module, for being amplified to the filtered signal of filtration module；
And the beam antenna being connected with amplification module, for transmission channel power.
Preferably, also include the central processing unit being connected with programmable logic array, digital to analog converter.
Preferably, also include the on-line module being connected with central processing unit, for being connected with host computer.
Preferably, the on-line module adopts network interface conversion chip.
Preferably, the on-line module adopts FSK modules.
Preferably, also include the power conditioning module being connected with central processing unit, which is used for controlling declining on each passage
Powered down road is realizing power adjustments.
Preferably, the power conditioning module adjusts voltage using potentiometer, and the attenuator circuit in control passage is realizing
Power adjustments.
Preferably, the instruction that the power conditioning module is issued using host computer, produces PWM using programmable logic array
Signal, and give attenuator circuit by voltage to realize power adjustments after module after filtering.
Preferably, also include the power detection module being connected with central processing unit, output is carried out by detection tube
Detection, and after detection gained signal is amplified by amplification module, the digital to analog converter for giving central processing unit is sampled,
Central processing unit is converted into current power by sampled voltage, and the brightness by LED or is sent to by on-line module
Show in the machine of position.
Preferably, the passage is 14, is divided into seven groups, and per group includes that a high band passage and a low-frequency range are led to
Road, one combining module of per group of connection, each combining module are all connected with a beam antenna.
Compared with prior art, the utility model has the advantage of：This utility model produces a base band using FPGA and adjusts
Signal processed, anolog base station baseband signal, then by being mixed modulates baseband signals to the corresponding frequency range of mobile phone so as to believe with base station
Number occur aliasing, allow mobile phone demodulation error, so as to reach shield effectiveness.Which has advantages below：First, for WCDMA, LTE etc.
Broadband signal, shield effectiveness are obvious；2nd, relative sweep method, can effectively reduce transmission power, reduce Overall Power Consumption, save
While cost, the purpose of energy-saving and emission-reduction is reached；3rd, digital technology is utilized, and the problems such as without temperature drift, equipment can be steady in a long-term
Be operated within accurate frequency range, it is ensured that effect；4th, due to utilizing the technology, can without too high radiant power
To reach shield effectiveness, harmless.
Description of the drawings
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or accompanying drawing to be used is briefly described needed for description of the prior art, it should be apparent that, drawings in the following description are only
It is some embodiments of the present utility model, for those of ordinary skill in the art, in the premise for not paying creative work
Under, can be with according to these other accompanying drawings of accompanying drawings acquisition.
Fig. 1 is the frame diagram that micropower intelligent digital described in the utility model orients cellular phone signal shielding device.
Specific embodiment
Below in conjunction with the accompanying drawings preferred embodiment of the present utility model is described in detail, so that advantage of the present utility model
Can be easier to be readily appreciated by one skilled in the art with feature, apparent clear and definite so as to make to protection domain of the present utility model
Define.
Embodiment one
Refering to shown in Fig. 1, this utility model provides a kind of micropower intelligent digital and orients cellular phone signal shielding device, including connection
Machine module 101, power conditioning module 102, power detection module 103, central processing unit 104, programmable logic array (FPGA)
105th, frequency mixing module 108 (other channel functions and the implementation method of digital to analog converter (DAC) 106, attenuator circuit 107, passage 1
Equally, frequency is variant), the filtration module 109 (other passage implementation methods are the same, and bandwidth is variant) of passage 1, passage 1
Amplification module 110 (other passage implementation methods are the same), combining module 111 (other passage implementation methods are the same), beam antenna
112 (other passage implementation methods are the same, and frequency is variant).
The on-line module 101 adopts network interface conversion chip, realizes that network interface turns RS485 interfaces, links with central processing unit,
Lead to and the module and computer are coupled together by netting twine, the setting and inquiry of device parameter can be realized by upper computer software.
The power conditioning module 102 adjusts voltage using potentiometer, and the attenuator circuit in control passage realizes that power is adjusted
Section.
The power detection module 103 carries out detection by detection tube to output, and detection gained signal is passed through
After amplifier is amplified, the ADC for giving central processing unit is sampled, and central processing unit is converted into current work(by sampled voltage
Rate, and the brightness by LED or by on-line module be sent in upper computer software show.
The central processing unit 104 adopts the various parameters of high performance ARM chips, processing equipment to arrange and inquire about, prison
The working condition of control equipment.
The programmable logic array 105 is FPGA, is mainly used in the generation of baseband modulation signal, the generation of pwm signal
And power on configuration is carried out to phase locked source (PLL).
The digital to analog converter 106 is DAC, is responsible for for the digital baseband signal that FPGA is produced being converted to analogue signal, and
Move intermediate frequency to.
The frequency mixing module 108 of passage 1 using phase locked source (PLL) and voltage controlled oscillator VCO production local oscillation signal, and by local oscillator
Signal gives frequency mixer, in the channel needed for the intermediate-freuqncy signal that DAC is produced is converted to.
The filtration module 109 of passage 1 selects the filtering of different bandwidth using SAW filter according to the bandwidth of different passages
Device is filtered to the signal that frequency mixing module is produced, and accomplishes accurate interference, while reducing power amplifier load.
Filtered signal is amplified by the amplification 110 of passage 1 using power amplifier, improves transmission power.
Combining module 111 by needing the frequency range for covering to be grouped, being respectively divided into 7 groups, per group of the inside have one high
Frequency range, a low-frequency range thus can be combined to two frequency ranges using paster duplexer, to reduce the number of output antenna
Amount, reduces cost.
Beam antenna 112 is used for transmission channel power.
In the present embodiment, the production method of digital baseband interference signal (i.e. baseband modulation signal) is comprised the following steps：
Step 1), digital baseband interference signal according to the agreement of various standard signals, in generation, is write according to agreement with MATLAB
Code, and generate baseband interference signal on computers；
Step 2), the baseband interference signal of generation is carried out peak clipping process, by peak-to-average force ratio control within 7dB, so may be used
Required with reducing power amplifier；
Step 3), base is carried out fixed point quantization by the baseband interference signal for quantifying, bit wide inside adaptation FPGA, reconvert
Into 16 system numbers；
Step 4), baseband interference signal that step 3 is produced be stored in the storage inside FPGA by FPGA developing instruments
In device, after upper electricity, FPGA in memory by digital independent out, according to the parameter that central processing unit 104 is brought, pass through
I/O interface module is sent to after processing (such as gain control or switch etc.), digital signal is sent to FPGA's by I/O interface module
I/O port.
Due to needing the frequency range up to 14 of shielding, if each frequency range connects an antenna, it is unfavorable for controlling production cost
And equipment volume, so, the present embodiment is proposed to needing 14 frequency ranges for covering to be grouped, and the paster using low cost is double
Work device (combining module 111) is combined.Being combined with the paster duplexer of low cost mainly can be with reduces cost and insertion
Loss, beneficial to the output for playing power amplifier to greatest extent.Step is as follows：
Step 1), all frequency ranges are divided into two groups, one group of low frequency, one group of high frequency, per group of each 7 frequency range.
Step 2), from inside each group, respectively select a frequency range to be input into as two of duplexer, note frequency when selection
The spacing of section, it is ensured that the interval of low-and high-frequency frequency range is enough.
Step 3), according to the high band of per group of the inside and low-frequency range, select suitable duplexer, the frequency to two frequency ranges
It is combined output.
112 a total of 7 antenna element of beam antenna of the present embodiment, are grouped with combiner (combining module 111) frequency range
Equally, each antenna element two frequency range of support, a high band, a low-frequency range, by such design, it is ensured that will
Each antenna element is interfered with each other and farthest compress the distance between antenna element in the case of being preferably minimized, and is saved empty
Between, so that equipment size is reduced.Antenna element is fixed on the shell of equipment, and is welded direct to PCB by radio-frequency cable
On plate, both artistic and practical.
The present embodiment realizes that signal shielding method specifically includes following steps：
Step 1), programmable logic array (FPGA) produces and interference signal gives digital to analog converter DAC by digital signal
Change into base-band analog signal；
Step 2), using manipulator by modulates baseband signals to need shield frequency range；
Step 3), with SAW filter by the signal filtering for modulating；
Step 4), modulated signal is amplified；
Step 5), transmit signals to space using beam antenna, cover the useful signal of communication in space, reach shielding effect
Really.
And the monitoring method that the present embodiment is provided is by Ethernet Centralized Monitoring.Monitoring step is as follows：
Step 1), the status information of central processing unit timing acquiring each link on master control borad, such as power, alarm statuses
Deng, and save it in internal memory.
Step 2) if central processing unit finds there is alarm on link, such as overpower or underpower alarm, then central authorities' process
Device actively will be accused to report to the police, by Ethernet interface, alarm data is sent to Centralized Monitoring room.
Step 3), whether Centralized Monitoring room receive warning signal and show which on screen, and be arranged as required to send
Sound alarm.Prompting staff is safeguarded.
Step 4), the staff of Centralized Monitoring room can also active inquiry equipment state, inquired about by triggering, allow and set
Standby uploaded state parameter.
Step 5), according to actual needs, the gain that arranges each link inside single device by monitoring software is independent
Control the output of each frequency range.
Step 6), according to actual needs, by the switch of monitoring software control device, or using time form, realize
Unmanned is automatically controlled.
By the enforcement of the present embodiment, which has advantages below：1st, realized using digital technology, effect is good, maximum shielding
Distance is up to 10m；2nd, beam antenna is adopted, and antenna gain is high, wide coverage；3rd, exported using the combining of paster duplexer, made
Antenna amount reduces half, the effectively save cost of energy, and reduces equipment size；4th, possesses Intelligent central monitoring function, convenient collection
Middle controlling switch and power.
Embodiment two
The other parts of the present embodiment are identical with embodiment one, and difference is, the on-line module 101 adopts FSK
Module turns RS485 interfaces, is connected with central processing unit.Turn FSK modules by the USB with computer end to realize wirelessly being connected, can be with
By upper computer software, the setting and inquiry of device parameter is realized.
Embodiment three
The other parts of the present embodiment are identical with embodiment one or embodiment two, and difference is, the power adjustments
The instruction that module 102 is issued by upper computer software, produces pwm signal using FPGA, and after RC filtering, voltage is given
Attenuator circuit, realizes power adjustments.
Although being described in conjunction with the accompanying embodiment of the present utility model, patent owner can be wanted in appended right
Various modifications or modification is made within the scope of asking, as long as less than the protection model described by claim of the present utility model
Enclose, all should be within protection domain of the present utility model.
Claims (10)
1. a kind of micropower intelligent digital orients cellular phone signal shielding device, it is characterised in that：Including,
Programmable logic array, for producing baseband modulation signal；
The digital to analog converter being connected with programmable logic array, for the digital baseband modulation letter for producing programmable logic array
Number analogue signal is converted to, and moves intermediate frequency to；
And at least one passage being connected with digital to analog converter；
Each passage includes the attenuator circuit being connected with digital to analog converter, and the frequency mixing module being connected with attenuator circuit, using lock phase
Source and voltage controlled oscillator produce local oscillation signal, and give frequency mixing module by local oscillation signal, after digital to analog converter is changed
Intermediate-freuqncy signal is converted in required channel；
The filtration module being connected with frequency mixing module, for being filtered to the signal that frequency mixing module is produced；
The amplification module being connected with filtration module, for being amplified to the filtered signal of filtration module；
And the beam antenna being connected with amplification module, for transmission channel power.
2. micropower intelligent digital according to claim 1 orients cellular phone signal shielding device, it is characterised in that：Also include with
Programmable logic array, the central processing unit of digital to analog converter connection.
3. micropower intelligent digital according to claim 2 orients cellular phone signal shielding device, it is characterised in that：Also include with
The on-line module of central processing unit connection, for being connected with host computer.
4. micropower intelligent digital according to claim 3 orients cellular phone signal shielding device, it is characterised in that：Described online
Module adopts network interface conversion chip.
5. micropower intelligent digital according to claim 3 orients cellular phone signal shielding device, it is characterised in that：Described online
Module adopts FSK modules.
6. micropower intelligent digital according to claim 2 orients cellular phone signal shielding device, it is characterised in that：Also include with
The power conditioning module of central processing unit connection, its are used for controlling attenuator circuit on each passage to realize power adjustments.
7. micropower intelligent digital according to claim 6 orients cellular phone signal shielding device, it is characterised in that：The power
Adjustment module adjusts voltage using potentiometer, and the attenuator circuit in control passage is realizing power adjustments.
8. micropower intelligent digital according to claim 6 orients cellular phone signal shielding device, it is characterised in that：The power
The instruction that adjustment module is issued using host computer, produces pwm signal using programmable logic array, and after filtering after module,
Attenuator circuit is given by voltage to realize power adjustments.
9. micropower intelligent digital according to claim 2 orients cellular phone signal shielding device, it is characterised in that：Also include with
The power detection module of central processing unit connection, carries out detection by detection tube, and detection gained signal is led to output
After crossing amplification module amplification, the digital to analog converter for giving central processing unit is sampled, and central processing unit passes through sampled voltage,
It is converted into current power, and the brightness by LED or be sent in host computer by on-line module is shown.
10. micropower intelligent digital according to claim 1 orients cellular phone signal shielding device, it is characterised in that：Described logical
Road is 14, is divided into seven groups, and per group includes a high band passage and a low-frequency range passage, one combining mould of per group of connection
Block, each combining module are all connected with a beam antenna.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621034293.6U CN206023803U (en) | 2016-08-31 | 2016-08-31 | A kind of micropower intelligent digital orients cellular phone signal shielding device |
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|---|---|---|---|
| CN201621034293.6U CN206023803U (en) | 2016-08-31 | 2016-08-31 | A kind of micropower intelligent digital orients cellular phone signal shielding device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106254028A (en) * | 2016-08-31 | 2016-12-21 | 广州市瀚云信息技术有限公司 | A kind of micropower intelligent digital orientation cellular phone signal shielding device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106254028A (en) * | 2016-08-31 | 2016-12-21 | 广州市瀚云信息技术有限公司 | A kind of micropower intelligent digital orientation cellular phone signal shielding device |
| CN106254028B (en) * | 2016-08-31 | 2019-03-22 | 广州市瀚云信息技术有限公司 | A kind of micropower intelligent digital orientation cellular phone signal shielding device |
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