CN102307052B - Intelligent fixed-frequency interferometer - Google Patents
Intelligent fixed-frequency interferometer Download PDFInfo
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- CN102307052B CN102307052B CN2011102859092A CN201110285909A CN102307052B CN 102307052 B CN102307052 B CN 102307052B CN 2011102859092 A CN2011102859092 A CN 2011102859092A CN 201110285909 A CN201110285909 A CN 201110285909A CN 102307052 B CN102307052 B CN 102307052B
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Abstract
The invention discloses an intelligent fixed-frequency interferometer which comprises a receiving antenna, a preamplifier, a high-frequency tuner, a frequency synthesizer, a low frequency power amplification launcher, an intermediate frequency power amplification launcher, a high frequency power amplification launcher, a singlechip and a transmitting antenna. According to the invention, the interferometer can be firstly turned into a first working mode, the singlechip is used for closing all the power amplification launchers, open the preamplifier to amplify radio signals received by the receiving antenna and control the high-frequency tuner to receive signals output by the preamplifier frequency point by frequency point as well as output the signals to the singlechip for sampling and storage; then, the interferometer can be turned into a second working mode, the frequency points of all signals are recorded according to the first working mode and then compared with the signals stored in the first working mode so as to find newly-generated radio signals, the corresponding frequency synthesizer is opened to generate interference signals, and finally a power amplifier can launch the interference signals to cover the newly-generated radio signals, thus the interference effect can be realized. The interferometer provided by the invention has the characteristics of strong position relevant to intelligence and energy conservation.
Description
Technical field
The present invention relates to the device that communication signal shields and disturbs, particularly a kind of Intelligent fixed-frequency interferometer.
Background technology
At present, to the interference of the illegal wireless signal of telecommunication that occurs at unknown time and frequency, generally take in whole predetermined band scope, scan fast in this frequency range with a powerful frequency.When the illegal signals frequency of disturbing frequency and appearance is identical, then to this illegal signals generation swamping effect.But this need to disturb the frequency point scanning frequency enough fast, to such an extent as to being passed that illegal signals can't be complete could produce good interference effect.
Development along with mechanics of communication, the antijamming capability of communication signal is constantly strengthened, when communication data is arrived one by one little packet by high compression, repeatedly and during transmission at a high speed, the effect of disturbing by current this scanning is just very unreliable, because packet can be finished transmission in scanning gap moment, thereby cause the failure disturbed.This also is the main cause that existing interferometer does not disturb communication apparatus of new generation (for example 3G mobile).
In view of this, the invention provides a kind of Intelligent fixed-frequency interferometer.
Summary of the invention
In view of above-mentioned the deficiencies in the prior art part, the object of the present invention is to provide good, the with strong points Intelligent fixed-frequency interferometer of a kind of interference effect.
In order to achieve the above object, the present invention has taked following technical scheme:
A kind of Intelligent fixed-frequency interferometer wherein, comprising:
For the reception antenna that receives radio signals;
For the preamplifier that the radio signal of reception antenna reception is amplified;
Be used for the signal by the output of frequency receiving preamplifier, and the signal strength signal intensity that receives sent to the frequency synthesis type TV tuner of single-chip microcomputer;
A plurality of integrated digital frequency synthesizers that produce corresponding oscillation frequency signal and output for the control signal according to single-chip microcomputer;
At least one low frequency power amplifying emission device for amplifying and launch the low-frequency oscillation frequency signal;
At least one for amplifying the also intermediate frequency power amplification reflector of emission medium-frequency oscillation frequency signal;
At least one high frequency power amplifying emission device for amplifying and launch higher-order of oscillation frequency signal;
The transmitting antenna of a plurality of oscillation frequency signals for launching respectively low frequency power amplifying emission device, intermediate frequency power amplification reflector and the output of high frequency power amplifying emission device; And
Be used for the work of control preamplifier, frequency synthesis type TV tuner, integrated digital frequency synthesizer, low frequency power amplifying emission device, intermediate frequency power amplification reflector and high frequency power amplifying emission device, and the control Intelligent fixed-frequency interferometer enters respectively the single-chip microcomputer of the first mode of operation and the second mode of operation; Wherein, described the first mode of operation be Intelligent fixed-frequency interferometer in whole effective frequency range to around radio signal sample and store; The second mode of operation is that Intelligent fixed-frequency interferometer detects radio signal on every side in whole effective frequency range, and compare with the sampled result of the first mode of operation storage and to find out emerging radio signal, and produce interference signal at the frequency of this emerging radio signal and cover described emerging radio signal;
Described reception antenna is connected with preamplifier, described preamplifier is connected with frequency synthesis type TV tuner with single-chip microcomputer respectively, described single-chip microcomputer is connected with low frequency power amplifying emission device, intermediate frequency power amplification reflector and high frequency power amplifying emission device respectively, described low frequency power amplifying emission device, intermediate frequency power amplification reflector and high frequency power amplifying emission device are connected and are connected with single-chip microcomputer by an integrated digital frequency synthesizer, and described low frequency power amplifying emission device, intermediate frequency power amplification reflector and high frequency power amplifying emission device also are connected with respectively a transmitting antenna;
The model of described frequency synthesis type TV tuner is BLH-DBT-AD703, and described frequency synthesis type TV tuner has 15 pins and two antennal interfaces; The signal of preamplifier output is introduced from the antennal interface of frequency synthesis type TV tuner, become the signal of fixing 36MHz from the 1st pin output of frequency synthesis type TV tuner after only having the frequency signal of appointment to be amplified by frequency synthesis type TV tuner in the signal of introducing, the signal of other frequencies is then suppressed by frequency synthesis type TV tuner;
Described integrated digital frequency synthesizer is integrated in the frequency synthesis type TV tuner, and its quantity is corresponding with the quantity of low frequency power amplifying emission device, intermediate frequency power amplification reflector and high frequency power amplifying emission device; The local frequency signal of described frequency synthesis type TV tuner draws output from the 6th, and the 2nd pin of frequency synthesis type TV tuner and the 11st pin provide the voltage of 5V to the integrated digital frequency synthesizer, and the shell of frequency synthesis type TV tuner is ground wire.
Described Intelligent fixed-frequency interferometer wherein, comprises that also the described button that empties is connected with single-chip microcomputer for the button that empties that empties data that single-chip microcomputer stores.
Described Intelligent fixed-frequency interferometer wherein, comprises that also described control switch is connected with single-chip microcomputer for the control switch of the mode of operation of control Intelligent fixed-frequency interferometer.
Described Intelligent fixed-frequency interferometer, wherein, preamplifier comprises amplifier chip and reed switch relay, the 1st pin of described reed switch relay is connected with the switch of unit sheet control pin, the 2nd pin is connected with reception antenna, the 3rd pin is connected with the 1st pin of amplifier chip, the 4th pin and the equal ground connection of the 5th pin; The 2nd pin of described amplifier chip is connected with frequency synthesis type TV tuner, and the 3rd pin connects high level, the 4th pin ground connection.
Described Intelligent fixed-frequency interferometer wherein, is provided with detection filter circuit between the A/D pin of frequency synthesis type TV tuner and single-chip microcomputer.
Described Intelligent fixed-frequency interferometer, wherein, described detection filter circuit comprises detector diode and filter capacitor, the anode of described detector diode is connected with frequency synthesis type TV tuner, negative electrode is connected the A/D pin with an end of filter capacitor respectively and is connected the other end ground connection of described filter capacitor with single-chip microcomputer.
Described Intelligent fixed-frequency interferometer, wherein, described low frequency power amplifying emission device, intermediate frequency power amplification reflector and high frequency power amplifying emission device respectively are two.
Described Intelligent fixed-frequency interferometer, wherein, low frequency power amplifying emission device is used for amplifying and launching the radio signal of 40MHz ~ 110MHz frequency band, intermediate frequency power amplification reflector is used for amplifying and launching the radio signal of 110MHz ~ 320MHz frequency band, and high frequency power amplifying emission device is used for the radio signal of amplification and emission 310MHz ~ 920MHz frequency band.
Described Intelligent fixed-frequency interferometer, wherein, it is the integrated chip of STC12C5A32AD that described single-chip microcomputer adopts model.
Intelligent fixed-frequency interferometer provided by the invention comprises reception antenna, preamplifier, frequency synthesis type TV tuner, integrated digital frequency synthesizer, basic, normal, high frequency power amplification reflector and single-chip microcomputer and transmitting antenna.Compared to prior art, the present invention makes first Intelligent fixed-frequency interferometer be introduced into the first mode of operation, by the closeall power amplification reflector of single-chip microcomputer, open preamplifier, the radio signal that reception antenna receives is amplified, and control frequency synthesis type TV tuner receives and exports to single-chip microcomputer by the signal that frequency is exported preamplifier in whole frequency, the wireless signal of control frequency synthesis type TV tuner output is sampled and store by single-chip microcomputer, then make Intelligent fixed-frequency interferometer enter the second mode of operation, and close first each power amplification reflector by single-chip microcomputer, opening preamplifier amplifies the whole faint radio signal that reception antenna receives, receive by the signal of frequency to preamplifier output in whole frequency range by frequency synthesis type TV tuner afterwards, the intensity of the signal that receives is delivered to single-chip microcomputer, by single-chip microcomputer the signal of storing in these signals and the first mode of operation is compared afterwards and find out emerging radio signal, and open corresponding power amplification reflector, go out by transmission antennas transmit after the interference signal that the integrated digital frequency synthesizer is produced is amplified and cover described emerging radio signal and play interference effect.Therefore the present invention only needs emerging illegal signals is disturbed, and intelligence is with strong points, greatly saves the energy.And Intelligent fixed-frequency interferometer provided by the invention adopts the mode of deciding the frequency interference, rather than traditional jamming equipment carries out wide spectrum scan interference, satisfied the requirement little, that can not allow illegal signals invade in the scanning neutral of the needed power output of equal interference level, and remarkably productive.In addition, Intelligent fixed-frequency interferometer provided by the invention does not produce legal signal and disturbs, and does not have bad environmental impact.
Description of drawings
The structured flowchart of the Intelligent fixed-frequency interferometer that Fig. 1 provides for the embodiment of the invention.
Fig. 2 is the schematic diagram of the preamplifier of Intelligent fixed-frequency interferometer provided by the invention.
Fig. 3 is the structural representation of the frequency synthesis type TV tuner of Intelligent fixed-frequency interferometer provided by the invention.
Fig. 4 is the circuit theory diagrams of the detection filter of Intelligent fixed-frequency interferometer provided by the invention.
Fig. 5 is the low frequency of Intelligent fixed-frequency interferometer provided by the invention, the structural representation of intermediate frequency power amplification reflector.
Embodiment
The invention provides a kind of Intelligent fixed-frequency interferometer and have two kinds of mode of operations, the first mode of operation is that Intelligent fixed-frequency interferometer carries out frequency scanning repeatedly several times in whole effective frequency range, detects the radio signal strength of each frequency and with its storage.The second mode of operation is that Intelligent fixed-frequency interferometer carries out frequency scanning in whole effective frequency range, and the radio signal strength that detects each frequency is made comparisons with the numerical value of this frequency of having stored; If find that the former storing value of frequency signal intensity corresponding frequency greater than 0(of a certain frequency is 0), then produce one very strong radio signal at this frequency, with the radio signal covering of detected frequency.And Intelligent fixed-frequency interferometer of the present invention can be bound a plurality of controlled transmitting antennas, thereby realizes the radio signal of detected a plurality of frequencies is covered.
When Intelligent fixed-frequency interferometer of the present invention is used for disturbing illegal radio signal, the signal data that at first needs to store in the Intelligent fixed-frequency interferometer empties, then confirming that periphery does not have the time of the illegal wireless signal of telecommunication, enter into the first mode of operation, peripheral radio signal spectrum distribution situation is stored, and this storing process can carry out repeatedly repeatedly.When Intelligent fixed-frequency interferometer is applied in the situation that meeting or examination hall etc. need to shield the illegal wireless signal of telecommunication, make Intelligent fixed-frequency interferometer enter the second mode of operation, this moment, Intelligent fixed-frequency interferometer detected first peripheral emerging radio signal, then produce strong interference signal at this frequency, emerging illegal radio signal is override.The program setting of Intelligent fixed-frequency interferometer inside re-starts frequency spectrum detection after a period of time (such as 1 minute), enter afterwards interference again, and so iterative cycles overrides all emerging frequency signals.
For making purpose of the present invention, technical scheme and effect clearer, clear and definite, developing simultaneously referring to accompanying drawing, the present invention is described in more detail for embodiment.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
See also Fig. 1, Intelligent fixed-frequency interferometer provided by the invention comprises reception antenna 11, preamplifier 21, frequency synthesis type TV tuner 31, a plurality of integrated digital frequency synthesizer 41, at least one low frequency power amplifying emission device 51, at least one intermediate frequency power amplification reflector 61, at least one high frequency power amplifying emission device 71, a plurality of transmitting antenna 81 and single-chip microcomputer 91.
Described reception antenna 11 is connected with preamplifier 21, described preamplifier 21 is connected with frequency synthesis type TV tuner with single-chip microcomputer 91 respectively and is connected, described single-chip microcomputer 91 respectively with low frequency power amplifying emission device 51, intermediate frequency power amplification reflector 61 is connected connection with high frequency power amplifying emission device, described low frequency power amplifying emission device 51, intermediate frequency power amplification reflector 61 is connected with high frequency power amplifying emission device respectively and is connected described low frequency power amplifying emission device 51 with single-chip microcomputer 91 by an integrated digital frequency synthesizer 41, intermediate frequency power amplification reflector 61 and high frequency power amplifying emission device 71 also are connected with respectively a transmitting antenna 81.
Wherein, described reception antenna 11 is used for receiving radio signals; Preamplifier 21 is used for the radio signal that reception antenna 11 receives is amplified; Frequency synthesis type TV tuner 31 is used for pursuing the signal of frequency receiving preamplifier 21 outputs, and the signal strength signal intensity that receives is sent to single-chip microcomputer 91; Integrated digital frequency synthesizer 41 is used for producing corresponding oscillation frequency signal and output according to the control signal of single-chip microcomputer 91.
Described low frequency power amplifying emission device 51 is used for amplifying and launching the low-frequency oscillation frequency signal that connected numerical frequency transducer produces; Intermediate frequency power amplification reflector 61 is used for amplifying and launching the medium-frequency oscillator frequency signal that connected numerical frequency transducer produces; High frequency power amplifying emission device 71 is used for amplifying and launching the higher-order of oscillation frequency signal that connected numerical frequency transducer produces; Described transmitting antenna 81 is used for the oscillation frequency signal of the connected low frequency power amplifying emission device 51 of corresponding emission, intermediate frequency power amplification reflector 61 or 71 outputs of high frequency power amplifying emission device.
Described single-chip microcomputer 91 is used for the work of control preamplifier 21, frequency synthesis type TV tuner 31, integrated digital frequency synthesizer 41, low frequency power amplifying emission device 51, intermediate frequency power amplification reflector 61 and high frequency power amplifying emission device 71, and the control Intelligent fixed-frequency interferometer enters respectively the first mode of operation and the second mode of operation.
Wherein, described the first mode of operation be Intelligent fixed-frequency interferometer in whole effective frequency range to around radio signal sample and store; The second mode of operation is that Intelligent fixed-frequency interferometer detects radio signal on every side in whole effective frequency range, and compare with the sampled result of the first mode of operation storage and to draw emerging radio signal, and produce interference signal at the frequency of this emerging radio signal and cover described emerging radio signal.
Please continue to consult Fig. 1, the Intelligent fixed-frequency interferometer that provides in the example of the present invention also comprises and empties button K1, the described button K1 that empties is connected with single-chip microcomputer 91, emptying button K1 is key switch, its two ends are connected with single-chip microcomputer 91 corresponding two pins, are used for emptying the signal spectrum data of single-chip microcomputer 91 storages.
In the embodiment of the invention, described Intelligent fixed-frequency interferometer also comprises control switch K2, and described control switch K2 is connected with single-chip microcomputer 91.Described control switch K2 is toggle switch, and its two ends are connected with single-chip microcomputer 91 corresponding two pins, is used for the mode of operation of control Intelligent fixed-frequency interferometer.Wherein, the mode of operation of described control switch K2 control is that single-chip microcomputer 91 internal processes are operated in the first mode of operation or the second mode of operation.
See also Fig. 1 and Fig. 2, preamplifier 21 comprises amplifier chip U1 and reed switch relay K3, the 1st pin of described reed switch relay K3 is connected with the switch of unit sheet control pin, the 2nd pin is connected with reception antenna 11, the 3rd pin is connected with the 1st pin of amplifier chip U1, the 4th pin and the equal ground connection of the 5th pin; The 2nd pin of described amplifier chip U1 is connected with frequency synthesis type TV tuner 31, and the 3rd pin connects high level, the 4th pin ground connection.
In the embodiment of the invention, it is the integrated chip of μ PC1651 that described amplifier chip U1 adopts model, it only has four pins, wherein, the 1st pin is that micro-signal input pin, the 2nd pin are power pins for amplification output pin, the 3rd pin, be used for the power supply of access 5V, the 4th pin is grounding pin.This amplifier chip U1 can carry out the amplification of low noise high-gain to the small-signal in the frequency range of 40 ~ 1000MHz.The switch of described reed switch relay K3 is guided by the switch control pin of single-chip microcomputer 91: relay is directed into ground when being closed condition, this moment, signal did not enter single-chip microcomputer 91; When relay is open mode, single-chip microcomputer 91 makes the relay conducting to the 1st pin of μ PC1651 chip, export from the 2nd pin of amplifier chip U1 after the amplification of the small-signal that reception antenna 11 receives through amplifier chip U1 broadband low noise high-gain, deliver in the frequency synthesis type TV tuner 31.
It is the integrated chip of STC12C5A32AD that described single-chip microcomputer 91 adopts model, and it is a high speed 51 series monolithics 91.It is the single clock instruction, except the programming in logic function with general single-chip microcomputer, inside also is furnished with 8 tunnel 8 high-speed AD converters (A/D), the analog signal that receives can be converted to binary numeral in real time, the EEPROM(Electrically Erasable Programmable Read-Only Memory that also is furnished with 28K in this single-chip microcomputer 91, EEPROM (Electrically Erasable Programmable Read Only Memo)), can be used for the long preservation data.The EEPROM that 28KB is arranged in the single-chip microcomputer 91 enough deposits 20K frequency in the frequency synthesis type TV tuner 31 whole frequency ranges.
In the present embodiment, described single-chip microcomputer 91 has 44 programmable signal pins, and these pins can become many I2C serial signal line to remove respectively to arrange frequency synthesis type TV tuner 31 and each integrated digital frequency synthesizer 41 by software simulation; It can also control relay removes the signal that distributes reception antenna 11 to receive, and the work that can control preamplifier 21 and each power amplification reflector whether.
See also Fig. 1 and Fig. 3, the frequency synthesis type TV tuner 31 of Intelligent fixed-frequency interferometer provided by the invention is the device on the television receiver, its model is BLH-DBT-AD703, the 15 bit codes that this frequency synthesis type TV tuner 31 is sent here by universal serial bus, can amplify accurately and receive from 45MHz to 900MHz the signal of each frequency of interval 50KHz.Single-chip microcomputer 91 passes through universal serial bus, the control tuner receives by the signal of frequency to preamplifier 21 outputs in whole frequency range, and the intensity of the signal that receives delivered on the analog-to-digital conversion pin of single-chip microcomputer 91, be converted to binary numeral in the analog to digital converter by single-chip microcomputer 91 inside, and deposit among the EEPROM of single-chip microcomputer 91.
In the present embodiment, described frequency synthesis type TV tuner 31 has 15 pins and two antennal interfaces 311,312.Signal in 48 ~ 900MHz scope of preamplifier 21 outputs is introduced from the antennal interface 311,312 of frequency synthesis type TV tuner 31.Wherein, become the stronger signal of fixing 36MHz from the 1st pin output of frequency synthesis type TV tuner 31 after only having the frequency signal of appointment to be amplified by frequency synthesis type TV tuner 31 in the signal of introducing, the signal of other frequencies is then suppressed by frequency synthesis type TV tuner 31.
In the described integrated digital frequency synthesizer 41 integrated medium frequency synthesis type TV tuners 31, its quantity is corresponding with the quantity of low frequency power amplifying emission device 51, intermediate frequency power amplification reflector 61 and high frequency power amplifying emission device 71.The model that this integrated digital frequency synthesizer 41 adopts the Philip to produce is the frequency synthesis chip of TDA6651.The 15 bit codes that this chip is sent here by universal serial bus can produce from 45MHz to 900MHz the sine wave signal of each frequency of interval 50KHz accurately.Single-chip microcomputer 91 is by universal serial bus, so that the integrated digital frequency synthesizer 41 that connects produces respectively the newly-increased frequency signal that all are detected, amplifies and delivers on the transmitting antenna 81 and launch by each power amplification reflector.
Because 31 appointed reception amplifying signal frequencies of frequency synthesis type TV tuner are than the low 36MHz of its local frequency, therefore need the output frequency of control integration digital frequency synthesizer 41 than the low 36MHz of local frequency of frequency synthesis type TV tuner 31, just can make the output frequency of integrated digital frequency synthesizer 41 select the amplifying signal frequency identical with frequency synthesis type TV tuner 31.These arrange by single-chip microcomputer 91 and realize to frequency synthesis type TV tuner 31 and corresponding 15 binary codes of integrated digital frequency synthesizer 41 transmissions respectively by serial signal line.
The 8th pin and the 9th pin of frequency synthesis type TV tuner 31 are the serial line interface pin, it produces stable local frequency by the integrated digital frequency synthesizer of serial signal control integration in frequency synthesis type TV tuner 31 inside from single-chip microcomputer 91 inputs, thereby so that frequency synthesis type TV tuner 31 receives only the input signal than the low 36MHz of local frequency.The local frequency signal of frequency synthesis type TV tuner 31 draws output from the 6th, and the 2nd pin of frequency synthesis type TV tuner 31 and the 11st pin provide the voltage of 5V to the integrated digital frequency synthesizer, and the shell of frequency synthesis type TV tuner 31 is ground wire.
Because the frequency band of power amplifier is narrow, so single-chip microcomputer 91 will distribute the power amplifier that uses different frequency range according to the height of tranmitting frequency.Therefore Intelligent fixed-frequency interferometer provided by the invention comprises three kinds of power amplification reflectors: low frequency power amplifying emission device 51, intermediate frequency power amplification reflector 61 and high frequency power amplifying emission device 71.
The model that low frequency and intermediate frequency power amplification reflector 61 adopt Fujitsu to produce is the FLL120 integrated power amplifier, and its working frequency range is 20MHz ~ 500MHz.The model that high frequency power amplifying emission device 71 adopts Hitachi, Ltd to produce is the microwave integrated amplifier chip of PF01411A, and its working frequency range is 400MHz ~ 2000MHz.This two chips all has stable performance, controls simple characteristics.And these two kinds of chips only have signal input, power stage, power supply and switch control, by the high-low level on the switch pin of single-chip microcomputer 91 power ratio control amplifying emission devices, namely can open and close corresponding power amplification reflector.
See also Fig. 1 and Fig. 5, it is the structural representation of low frequency, intermediate frequency power amplification reflector, the 2nd pin of this power amplification reflector receives the frequency signal of integrated digital frequency synthesizer 41 outputs, export transmitting antenna 81 to from the 3rd pin after amplifying through the amplifying circuit by power amplification reflector inside, by transmitting antenna 81 frequency signal is transmitted into the space afterwards.The 4th pin is power pins, copper radiating rib 5 forms the ground wire pin of power amplification reflector, and the 1st pin is switch pin, is connected on the switch control pin of single-chip microcomputer 91, the power amplification reflector is not worked when this pin is low level, and the power amplification reflector is just worked during high level.
In the present embodiment, the radio signal that low frequency power amplifying emission device 51 is used for amplifying and launching 40MHz ~ 110MHz frequency band, the radio signal that intermediate frequency power amplification reflector 61 is used for amplifying and launching 110MHz ~ 320MHz frequency band, high frequency power amplifying emission device 71 is used for the radio signal of amplification and emission 310MHz ~ 920MHz frequency band.
And, be two (being that described low frequency power amplifying emission device 51, intermediate frequency power amplification reflector 61 and high frequency power amplifying emission device 71 respectively are two) at the power amplifier of each frequency range of Intelligent fixed-frequency interferometer provided by the invention.Certainly, in order to reach better effect, the power amplification reflector of each frequency range also can adopt more than two, to disturb a plurality of illegal signals frequencies that occur simultaneously.When the quantity of the power amplification reflector that connects surpasses the quantity of Single-chip Controlling pin, can also realize that it is prior art, repeats no more herein by single-chip microcomputer IO expansion means.
See also Fig. 4, Intelligent fixed-frequency interferometer provided by the invention is provided with detection filter circuit 101 between the A/D pin of frequency synthesis type TV tuner 31 and single-chip microcomputer 91.Described detection filter circuit comprises detector diode D1 and filter capacitor C1, the anode of described detector diode is connected with frequency synthesis type TV tuner 31, negative electrode is connected with the A/D pin that an end of filter capacitor is connected with single-chip microcomputer respectively, the other end ground connection of described filter capacitor.
Described detection filter circuit 101 detections level of signal strength out is the intensity of signal on the frequency synthesis type TV tuner 31 specified reception frequencies.So the stool and urine of binary numerical value that Chip Microcomputer A/D converts is representing the intensity of this frequency signal.If the intensity of frequency is zero, the binary numerical value that then converts also is zero.
Below in conjunction with Fig. 1, Intelligent fixed-frequency interferometer working method provided by the invention is elaborated:
When using Intelligent fixed-frequency interferometer provided by the invention, at first press and empty button K1 data and make emptying of single-chip microcomputer 91 interior storages.Then confirming that periphery does not have the time of the illegal wireless signal of telecommunication, stirring control switch K2 and make Intelligent fixed-frequency interferometer enter the first mode of operation (if this moment, control switch K2 was the state that points to the first work carpenter, then need not stir control switch K2).At this moment, single-chip microcomputer 91 output control signals, close all power amplification reflectors by its switch control pin, opening receiving preamplifier 21 amplifies whole small-signals that reception antenna 11 receives, and pass through universal serial bus by single-chip microcomputer 91, control frequency synthesis type TV tuner 31 receives by the signal of frequency to preamplifier 21 output in whole frequency range, and the intensity of the signal that receives is delivered to is converted to binary numeral in the analog to digital converter of single-chip microcomputer 91 and deposits among the EEPROM of single-chip microcomputer 91.During implementation, this detection, storing process can carry out repeatedly repeatedly, make it to the whole samples storages of legal signal on every side.
After the radio signal around the Intelligent fixed-frequency interferometer being adopted and store, stir control switch K2 and make Intelligent fixed-frequency interferometer enter the second mode of operation.In this mode of operation, at first, single-chip microcomputer 91 transmit button control signals are closed all power amplification reflectors, are opened whole small-signals amplifications that preamplifier 21 receives reception antenna 11.Simultaneously, single-chip microcomputer 91 receives by the signal of frequency to preamplifier 21 outputs in whole frequency range by serial bus control frequency synthesis type TV tuner 31, and the intensity of the signal that receives is delivered in the analog to digital converter of single-chip microcomputer 91 and be converted to binary numeral, the numerical value that stores among the EEPROM by single-chip microcomputer 91 and same frequency under the first mode of operation afterwards compares.If the numerical value of storing during the first mode of operation is zero, and the numerical value that receives under the second mode of operation is not zero, the signal that this frequency then is described is emerging frequency signal, and single-chip microcomputer 91 is write down this newly-increased frequency.
After all emerging frequencies were all write down in the frequency range, single-chip microcomputer 91 cut out preamplifier 21 by switch control pin and causes the damage of device to prevent strong signal, and opens and the corresponding power amplification reflector of the frequency band of each frequency.Single-chip microcomputer 91 is controlled respectively each integrated digital frequency synthesizer 41 that connects by universal serial bus, produced the oscillation frequency signal of all newly-increased frequency signals that detect by each integrated digital frequency synthesizer 41, amplify and deliver on the transmitting antenna 81 and launch by corresponding power amplification reflector, thereby play newly to occur the interference effect of radio signal.
In sum, the present invention only needs emerging illegal signals is disturbed, and intelligence is with strong points, greatly saves the energy.And Intelligent fixed-frequency interferometer provided by the invention adopts the mode of deciding the frequency interference, rather than traditional jamming equipment carries out wide spectrum scan interference, satisfied the requirement little, that can not allow illegal signals invade in the scanning neutral of the needed power output of equal interference level, and remarkably productive.In addition, Intelligent fixed-frequency interferometer provided by the invention does not produce legal signal and disturbs, and does not have bad environmental impact.
Be understandable that, for those of ordinary skills, can be equal to replacement or change according to technical scheme of the present invention and inventive concept thereof, and all these changes or replacement all should belong to the protection range of the appended claim of the present invention.
Claims (9)
1. an Intelligent fixed-frequency interferometer is characterized in that, comprising:
For the reception antenna that receives radio signals;
For the preamplifier that the radio signal of reception antenna reception is amplified;
Be used for the signal by the output of frequency receiving preamplifier, and the signal strength signal intensity that receives sent to the frequency synthesis type TV tuner of single-chip microcomputer;
A plurality of integrated digital frequency synthesizers that produce corresponding oscillation frequency signal and output for the control signal according to single-chip microcomputer;
At least one low frequency power amplifying emission device for amplifying and launch the low-frequency oscillation frequency signal;
At least one for amplifying the also intermediate frequency power amplification reflector of emission medium-frequency oscillation frequency signal;
At least one high frequency power amplifying emission device for amplifying and launch higher-order of oscillation frequency signal;
The transmitting antenna of a plurality of oscillation frequency signals for launching respectively low frequency power amplifying emission device, intermediate frequency power amplification reflector and the output of high frequency power amplifying emission device; And
Be used for the work of control preamplifier, frequency synthesis type TV tuner, integrated digital frequency synthesizer, low frequency power amplifying emission device, intermediate frequency power amplification reflector and high frequency power amplifying emission device, and the control Intelligent fixed-frequency interferometer enters respectively the single-chip microcomputer of the first mode of operation and the second mode of operation; Wherein, described the first mode of operation be Intelligent fixed-frequency interferometer in whole effective frequency range to around radio signal sample and store; The second mode of operation is that Intelligent fixed-frequency interferometer detects radio signal on every side in whole effective frequency range, and compare with the sampled result of the first mode of operation storage and to find out emerging radio signal, and produce interference signal at the frequency of this emerging radio signal and cover described emerging radio signal;
Described reception antenna is connected with preamplifier, described preamplifier is connected with frequency synthesis type TV tuner with single-chip microcomputer respectively, described single-chip microcomputer is connected with low frequency power amplifying emission device, intermediate frequency power amplification reflector and high frequency power amplifying emission device respectively, described low frequency power amplifying emission device, intermediate frequency power amplification reflector and high frequency power amplifying emission device are connected and are connected with single-chip microcomputer by an integrated digital frequency synthesizer, and described low frequency power amplifying emission device, intermediate frequency power amplification reflector and high frequency power amplifying emission device also are connected with respectively a transmitting antenna;
The model of described frequency synthesis type TV tuner is BLH-DBT-AD703, and described frequency synthesis type TV tuner has 15 pins and two antennal interfaces; The signal of preamplifier output is introduced from the antennal interface of frequency synthesis type TV tuner, become the signal of fixing 36MHz from the 1st pin output of frequency synthesis type TV tuner after only having the frequency signal of appointment to be amplified by frequency synthesis type TV tuner in the signal of introducing, the signal of other frequencies is then suppressed by frequency synthesis type TV tuner;
Described integrated digital frequency synthesizer is integrated in the frequency synthesis type TV tuner, and its quantity is corresponding with the quantity of low frequency power amplifying emission device, intermediate frequency power amplification reflector and high frequency power amplifying emission device; The local frequency signal of described frequency synthesis type TV tuner draws output from the 6th, and the 2nd pin of frequency synthesis type TV tuner and the 11st pin provide the voltage of 5V to the integrated digital frequency synthesizer, and the shell of frequency synthesis type TV tuner is ground wire.
2. Intelligent fixed-frequency interferometer according to claim 1 is characterized in that, comprises that also the described button that empties is connected with single-chip microcomputer for the button that empties that empties data that single-chip microcomputer stores.
3. Intelligent fixed-frequency interferometer according to claim 1 is characterized in that, comprises that also described control switch is connected with single-chip microcomputer for the control switch of the mode of operation of control Intelligent fixed-frequency interferometer.
4. Intelligent fixed-frequency interferometer according to claim 1, it is characterized in that, preamplifier comprises amplifier chip and reed switch relay, the 1st pin of described reed switch relay is connected with the switch of single-chip microcomputer control pin, the 2nd pin is connected with reception antenna, the 3rd pin is connected with the 1st pin of amplifier chip, the 4th pin and the equal ground connection of the 5th pin; The 2nd pin of described amplifier chip is connected with frequency synthesis type TV tuner, and the 3rd pin connects high level, the 4th pin ground connection.
5. Intelligent fixed-frequency interferometer according to claim 1 is characterized in that, is provided with detection filter circuit between the A/D pin of frequency synthesis type TV tuner and single-chip microcomputer.
6. Intelligent fixed-frequency interferometer according to claim 5, it is characterized in that, described detection filter circuit comprises detector diode and filter capacitor, the anode of described detector diode is connected with frequency synthesis type TV tuner, negative electrode is connected the A/D pin with an end of filter capacitor respectively and is connected the other end ground connection of described filter capacitor with single-chip microcomputer.
7. Intelligent fixed-frequency interferometer according to claim 1 is characterized in that, described low frequency power amplifying emission device, intermediate frequency power amplification reflector and high frequency power amplifying emission device respectively are two.
8. Intelligent fixed-frequency interferometer according to claim 1, it is characterized in that, low frequency power amplifying emission device is used for amplifying and launching the radio signal of 40MHz ~ 110MHz frequency band, intermediate frequency power amplification reflector is used for amplifying and launching the radio signal of 110MHz ~ 320MHz frequency band, and high frequency power amplifying emission device is used for the radio signal of amplification and emission 310MHz ~ 920MHz frequency band.
9. Intelligent fixed-frequency interferometer according to claim 1 is characterized in that, it is the integrated chip of STC12C5A32AD that described single-chip microcomputer adopts model.
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| CN102307052B true CN102307052B (en) | 2013-10-16 |
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| CN102694555B (en) * | 2012-05-22 | 2014-04-30 | 成都九华圆通科技发展有限公司 | Miniaturized intelligent signal suppressor |
| TW201421909A (en) * | 2012-11-23 | 2014-06-01 | Elan Microelectronics Corp | Sampling method for suppressing constant frequency noise |
| CN103312358B (en) * | 2013-05-22 | 2015-02-04 | 廖华芬 | Respond wireless interference signal generator and method thereof |
| CN105553490B (en) * | 2015-12-17 | 2017-12-01 | 中国电子科技集团公司第四十一研究所 | A kind of green mobile Communication Jamming device and its interference method |
| CN105827358B (en) * | 2016-06-03 | 2019-02-26 | 广州市诚臻电子科技有限公司 | A kind of apparatus and system for shield effectiveness detection |
| CN106533609A (en) * | 2016-12-15 | 2017-03-22 | 深圳市飞思腾科技有限公司 | Digital signal interferometer |
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| CN101540615A (en) * | 2009-04-22 | 2009-09-23 | 陆贻东 | Method for shielding signals of mobile phone and portable wireless instrument for emitting multitone jamming |
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