CN211180582U - Radio frequency interference system of unmanned aerial vehicle anti-system - Google Patents
Radio frequency interference system of unmanned aerial vehicle anti-system Download PDFInfo
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- CN211180582U CN211180582U CN201922042725.8U CN201922042725U CN211180582U CN 211180582 U CN211180582 U CN 211180582U CN 201922042725 U CN201922042725 U CN 201922042725U CN 211180582 U CN211180582 U CN 211180582U
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Abstract
The utility model discloses a radio frequency interference system of unmanned aerial vehicle system of turning over, it is unstable mainly to solve current radio frequency interference system signal emission intensity, problem that the signal interference success rate is low. The radio frequency interference system comprises a micro control unit, a frequency synthesis circuit and a microwave switch which are connected with the micro control unit, a frequency divider connected with the frequency synthesis circuit, an oscillating circuit connected with the frequency divider, a mixing circuit connected with the oscillating circuit and the frequency synthesis circuit, a baseband signal noise source connected with the microwave switch, and a first power amplifier connected with the microwave switch; wherein the mixer circuit is also connected to the microwave switch. The utility model discloses a radio frequency interference system has avoided the system to carry out powerful radio frequency signal production under unnecessary condition, reduces the consumption, and entire system's control switches in a flexible way, high-efficient, can accurately produce required interfering signal, and signal strength is stable, has promoted the strike success rate of unmanned aerial vehicle anti-system. Therefore, the method is suitable for popularization and application.
Description
Technical Field
The utility model belongs to the technical field of unmanned aerial vehicle countermeasures technique and specifically relates to a radio frequency interference system of unmanned aerial vehicle countermeasures system is related to.
Background
Along with the revolution and development of unmanned aerial vehicle technology, people are increasing the use demand of unmanned aerial vehicles, and small-size commercial multiaxis unmanned aerial vehicle has become a popular consumer product with its self characteristics that the size is little, the noise is little, convenient to carry, the manipulation is simple and convenient. At present, the market development of unmanned aerial vehicles at home and abroad is rapid, more and more unmanned aerial vehicle fans own the unmanned aerial vehicles, but the problems caused by the unmanned aerial vehicle fans are also gradually outstanding.
In some specific areas, where the drone is prohibited from flying, the drone needs to be monitored and countered, and the drone countercheck system is mainly applied to the following aspects, such as protection of the no-fly area: airport, nuclear power facility, military management area, prison, satellite launching tower, national strategic resource project, government department etc. and for example protection of secret-involved area: national security agencies, important security places, large-scale sports events, large-scale performance events, archaeological excavation sites, commercial confidential information, illegal criminal behaviors with unmanned aerial vehicles as carriers, prevention and control, attack on transportation and drug delivery, smuggling, transportation of illegal articles, illegal information transfer border damage and the like.
The unmanned aerial vehicle counter-braking system enables the unmanned aerial vehicle to trigger a protection mechanism to automatically return or land by transmitting a radio frequency interference signal. The existing radio frequency interference system of the unmanned aerial vehicle counter-braking system is complex in structure, high in power consumption, unstable in radio frequency interference signal emission intensity and weak in time, so that the unmanned aerial vehicle counter-braking system is low in interference success rate on the 'black flying' unmanned aerial vehicle.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a radio frequency interference system of unmanned aerial vehicle system of countering, it is unstable mainly to solve current radio frequency interference system signal emission intensity, and the problem that the signal interference success rate is low.
In order to achieve the above object, the utility model adopts the following technical scheme:
a radio frequency interference system of an unmanned aerial vehicle anti-jamming system comprises a micro control unit, a frequency synthesis circuit, a microwave switch, a frequency divider, an oscillating circuit, a mixing circuit, a baseband signal noise source and a first power amplifier, wherein the frequency synthesis circuit and the microwave switch are connected with the micro control unit; wherein the mixer circuit is also connected to the microwave switch.
Further, the baseband signal noise source comprises a baseband noise signal generating circuit, a preamplifier circuit connected with the baseband noise signal generating circuit, an analog-to-digital conversion circuit connected with the preamplifier circuit, an FPGA controller connected with the analog-to-digital conversion circuit, a crystal oscillator, a clock circuit, a frequency modulation noise signal generating circuit, a frequency modulation noise power amplifying circuit connected with the frequency modulation noise signal generating circuit and a first band-pass filter connected with the frequency modulation noise power amplifying circuit, wherein the crystal oscillator, the clock circuit and the frequency modulation noise signal generating circuit are all connected with the FPGA controller; the crystal oscillator is further connected with a clock circuit, and the first band-pass filter is connected with the microwave switch.
Further, the frequency synthesis circuit comprises a frequency synthesizer connected with the micro control unit and a second power amplifier connected with the frequency synthesizer. And a low pass filter coupled to the second power amplifier; the frequency synthesizer is also connected with the frequency divider, and the low-pass filter is connected with the mixing circuit.
Furthermore, the oscillation circuit comprises an oven controlled crystal oscillator, a phase-locked loop circuit connected with the oven controlled crystal oscillator, and an isolation amplifier connected with the phase-locked loop circuit; wherein the isolation amplifier is connected to the frequency divider and the mixer circuit.
Further, the mixer circuit comprises a mixer connected with the low-pass filter and the isolation amplifier, and a second band-pass filter connected with the mixer; wherein the second band-pass filter is connected to the microwave switch.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the utility model discloses utilize the microwave switch to select different radio frequency signal to produce the passageway, under the operating condition of difference, to the radio frequency interference signal that the forbidden area of flying is sent different, avoid the system to carry out powerful radio frequency signal production under unnecessary situation, reduce the consumption, and entire system's control switches nimble, high-efficient, can accurately produce required interference signal, and signal strength is stable, lasts, has promoted the strike success rate of unmanned aerial vehicle anti-system.
(2) The utility model discloses based on DDS technique and phase-locked loop technique, control through the singlechip, can produce the extremely high interference frequency of resolution ratio, control is convenient, nimble.
(3) The utility model provides a baseband signal noise source utilizes FPGA control to carry out frequency modulation control to baseband noise, and the system cost is lower, and the function is realized more in a flexible way, and it is more convenient to dispose, is convenient for obtain required radio frequency interference signal.
Drawings
Fig. 1 is an overall schematic block diagram of the present invention.
Fig. 2 is a schematic block diagram of a baseband signal noise source according to the present invention.
Fig. 3 is a schematic diagram of the frequency modulation noise signal generating circuit of the present invention.
Fig. 4 is a schematic diagram of the frequency modulation noise power amplifying circuit of the present invention.
Detailed Description
The present invention will be further described with reference to the following description and examples, which include but are not limited to the following examples.
Examples
As shown in fig. 1 and 2, the utility model discloses a radio frequency interference system of unmanned aerial vehicle anti-system, including the micro control unit, frequency synthesis circuit and microwave switch that all link to each other with the micro control unit, the frequency divider that links to each other with the frequency synthesis circuit, the oscillating circuit that links to each other with the frequency divider, the mixing circuit that links to each other with oscillating circuit and frequency synthesis circuit, the baseband signal noise source that links to each other with the microwave switch, and the first power amplifier that links to each other with the microwave switch; wherein the mixer circuit is also connected to the microwave switch.
The baseband signal noise source comprises a baseband noise signal generating circuit, a pre-amplifying circuit connected with the baseband noise signal generating circuit, an analog-to-digital conversion circuit connected with the pre-amplifying circuit, an FPGA controller connected with the analog-to-digital conversion circuit, a crystal oscillator, a clock circuit, a frequency modulation noise signal generating circuit, a frequency modulation noise power amplifying circuit connected with the frequency modulation noise signal generating circuit and a first band-pass filter connected with the frequency modulation noise power amplifying circuit, wherein the crystal oscillator, the clock circuit and the frequency modulation noise signal generating circuit are all connected with the FPGA controller; the crystal oscillator is further connected with a clock circuit, and the first band-pass filter is connected with the microwave switch. The FPGA controller selects EP4CE6E22C8N series of Altera company, the clock circuit adopts a conventional 1GHz reference clock circuit, and the model of a chip in the analog-to-digital conversion circuit is AD 9224.
As shown in fig. 3, the fm signal generating circuit includes a chip U1 of a type RF401, a crystal oscillator Y1 connected between an XC1 pin and an XC2 pin of a chip U1, a resistor R1 connected in parallel to both ends of the crystal oscillator Y1, capacitors C1 and C1 connected to both ends of the resistor R1 and grounded, respectively, a capacitor C1 connected to a VSS pin of the chip U1 and connected to a T1 pin of the chip U1 at the other end, a resistor R1 and a capacitor C1 connected in series with one end connected to the FI 1T 1 pin of the chip U1 and grounded at the other end, a resistor R1 connected to a power supply and grounded at the other end, and resistors C1, C1 and C1 connected to a VDD pin of the chip U1 and grounded at the other end, an inductor 361 connected between the VCO1 pin of the chip U1 and the VCO1 pin of the chip U1, a resistor R1 connected to a power supply and grounded at the RF _ R1 and grounded at the other end.
As shown in fig. 4, the fm noise power amplifying circuit includes an amplifier a1, a resistor R5 connected to the positive input terminal of the amplifier a1, a resistor R6 connected to the output terminal of the amplifier A1, a diode D1 having its cathode connected to the other end of the resistor R6, a resistor R7 connected with the anode of the diode D1, a capacitor C8 connected with the other end of the resistor R7, a diode D3 connected with the other end of the capacitor C8 at the anode, a diode D2 connected with the anode input end of an amplifier A1 at the cathode, resistors R8 and R9 connected with the anode of the diode D2 at the anode, a capacitor C9 connected with the other end of the resistor R8 at one end and grounded at the other end, an amplifier A2 connected with the other end of the resistor R9 and the anode of the diode D3 at the anode input end, a resistor R10 connected with the anode input end of the amplifier A2 at one end and grounded at the other end, and a resistor R11 connected with the output end of the amplifier A2; the other end of the resistor R5 is connected with a DOUT pin of the chip U1, and the other end of the resistor R11 is connected with the first band-pass filter.
The frequency synthesis circuit comprises a frequency synthesizer connected with the micro control unit and a second power amplifier connected with the frequency synthesizer. And a low pass filter coupled to the second power amplifier; the frequency synthesizer is also connected with the frequency divider, and the low-pass filter is connected with the mixing circuit. The frequency divider divides by four.
The oscillation circuit comprises an oven controlled crystal oscillator, a phase-locked loop circuit connected with the oven controlled crystal oscillator and an isolation amplifier connected with the phase-locked loop circuit; wherein the isolation amplifier is connected to the frequency divider and the mixer circuit.
The frequency mixing circuit comprises a frequency mixer connected with the low-pass filter and the isolation amplifier, and a second band-pass filter connected with the frequency mixer; wherein the second band-pass filter is connected to the microwave switch. The microwave switch adopts a PXI series microwave switch module of Pickering Interfaces.
The utility model discloses utilize the switching of little the control unit control microwave switch, when the first band pass filter of microwave switch-on, the random interference noise of radio frequency interference system output produces the random interference signal of frequency in the target frequency range, forms the suppression that flies unmanned aerial vehicle communication frequency to black. When the microwave switch is connected with the second band-pass filter, the radio frequency interference system outputs dot frequency interference or frequency sweep interference noise. Under the condition that the target frequency is known, the dot frequency interference aims at the target frequency to output a radio frequency interference signal, and suppression of the communication frequency of the black flying unmanned aerial vehicle is formed. The frequency scanning is carried out in the target frequency range by the sweep frequency interference, and when the collision probability of the interference signal frequency and the communication frequency reaches a certain value, the signal-to-noise ratio of the black flying unmanned aerial vehicle communication is influenced, so that the error rate is increased, and effective interference is generated. The synergistic effect of various radio frequency signal interferences avoids long-time high-power consumption and reduces the overall power consumption of the system.
Through the design, the utility model discloses utilize the microwave switch to select different radio frequency signal to produce the passageway, under the operating condition of difference, to the radio frequency interference signal that the forbidden area of flying away sent different, avoid the system to carry out powerful radio frequency signal production under unnecessary situation, reduce the consumption, and entire system's control switch is nimble, high-efficient, can accurately produce required interference signal, and signal strength is stable, lasts, has promoted the strike success rate of unmanned aerial vehicle anti-system. Therefore, the method has high use value and popularization value.
The above embodiment is only one of the preferred embodiments of the present invention, and should not be used to limit the protection scope of the present invention, but all the insubstantial changes or modifications made in the spirit and the idea of the main design of the present invention, the technical problems solved by the embodiment are still consistent with the present invention, and all should be included in the protection scope of the present invention.
Claims (5)
1. A radio frequency interference system of an unmanned aerial vehicle anti-jamming system is characterized by comprising a micro control unit, a frequency synthesis circuit, a microwave switch, a frequency divider, an oscillating circuit, a mixing circuit, a baseband signal noise source and a first power amplifier, wherein the frequency synthesis circuit and the microwave switch are connected with the micro control unit; wherein the mixer circuit is also connected to the microwave switch.
2. The system of claim 1, wherein the source of the baseband signal noise comprises a baseband noise signal generating circuit, a preamplifier circuit connected to the baseband noise signal generating circuit, an analog-to-digital converter circuit connected to the preamplifier circuit, an FPGA controller connected to the analog-to-digital converter circuit, a crystal oscillator, a clock circuit, a frequency modulation noise signal generating circuit, a frequency modulation noise power amplifier circuit connected to the frequency modulation noise signal generating circuit, and a first bandpass filter connected to the frequency modulation noise power amplifier circuit; the crystal oscillator is further connected with a clock circuit, and the first band-pass filter is connected with the microwave switch.
3. The system of claim 2, wherein the frequency synthesizer circuit comprises a frequency synthesizer connected to the micro control unit, a second power amplifier connected to the frequency synthesizer, and a low pass filter connected to the second power amplifier; the frequency synthesizer is also connected with the frequency divider, and the low-pass filter is connected with the mixing circuit.
4. The system of claim 3, wherein the oscillator circuit comprises an oven controlled crystal oscillator, a phase locked loop circuit coupled to the oven controlled crystal oscillator, and an isolation amplifier coupled to the phase locked loop circuit; wherein the isolation amplifier is connected to the frequency divider and the mixer circuit.
5. The system of claim 4, wherein the mixer circuit comprises a mixer coupled to the low pass filter and the isolation amplifier, and a second band pass filter coupled to the mixer; wherein the second band-pass filter is connected to the microwave switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922042725.8U CN211180582U (en) | 2019-11-22 | 2019-11-22 | Radio frequency interference system of unmanned aerial vehicle anti-system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922042725.8U CN211180582U (en) | 2019-11-22 | 2019-11-22 | Radio frequency interference system of unmanned aerial vehicle anti-system |
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| Publication Number | Publication Date |
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| CN211180582U true CN211180582U (en) | 2020-08-04 |
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| CN201922042725.8U Active CN211180582U (en) | 2019-11-22 | 2019-11-22 | Radio frequency interference system of unmanned aerial vehicle anti-system |
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| CN (1) | CN211180582U (en) |
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2019
- 2019-11-22 CN CN201922042725.8U patent/CN211180582U/en active Active
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