A critical regional unmanned aerial vehicle harassment defense device

Abstract

The utility model discloses a kind of vital region unmanned aerial vehicle harassment defense device, including confrontation launch assembly, the confrontation launch assembly includes high frequency module, low frequency module and launch module;Control module;Power module, for the control module and the confrontation launch assembly power supply, adopt multifunction, high integration, integrated design, through the radio wave of certain frequency range of special transmitter output, unmanned aerial vehicle communication link, navigation signal or control signal is implemented interference, to reach the purpose of weakening, blocking even driving off unmanned aerial vehicle flight, effectively solve the implementation malicious intrusion or intent intrusion array area unmanned aerial vehicle, ensure the absolute safety of vital region, with higher economic value and popularization prospect.

Description

Technical Field

[0001] This utility model relates to the field of drone countermeasures technology, specifically a drone harassment defense device for key areas. Background Technology

[0002] With the rise of the low-altitude economy, my country has clearly put forward the ambitious goal of accelerating the construction of a new strategic industry for the low-altitude economy. In recent years, my country's drones have gradually developed towards consumer-oriented models characterized by "low, slow, and small" speeds, and the development of countermeasure technologies cannot keep pace with the speed of drone upgrades.

[0003] With the popularization of drone technology, incidents of unauthorized drones intruding into sensitive airspace are frequent. These drones are often high-end and have evolved from single aerial photography tools to intelligent, stealthy, and swarm-based technologies. They possess multi-functional and rapid maneuverability, as well as enhanced proactive countermeasures capabilities, further weakening the effectiveness of traditional detection methods. If drones are equipped with explosives, espionage devices, or electromagnetic interference devices, they pose a serious threat to national and public safety.

[0004] Current drone defense methods mainly include:

[0005] Electromagnetic interference: This method forces the target UAV to land or return by suppressing its GNSS signal or control link. However, it suffers from problems such as a single interference spectrum, low power efficiency, and the risk of accidentally damaging surrounding equipment.

[0006] Net-based / laser-based interception: effective at close range, but with a short effective range, making it difficult to deal with high-speed or clustered targets.

[0007] Therefore, there is an urgent need to develop a critical area protection device that combines directional and precise jamming, wide spectrum coverage, and intelligent response capabilities. Utility Model Content

[0008] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a device for defending against drone harassment in key areas. In order to solve the above-mentioned technical problem, this utility model provides the following technical solution:

[0009] This utility model is a device for defending against drone harassment in key areas, comprising:

[0010] A counter-emission assembly, comprising a high-frequency module, a low-frequency module, and a transmission module;

[0011] Control module;

[0012] A power supply module is used to supply power to the control module and the counter-emission component;

[0013] in,

[0014] The high-frequency module includes an exciter, an intermediate amplifier, a power amplifier, a power combiner, and a high-frequency bandpass filter connected in sequence.

[0015] The low-frequency module includes a crystal oscillator, a subcarrier generator, a pulse width modulator, a pulse amplifier, a modulator, and a low-pass filter;

[0016] The output terminal of the crystal oscillator is coupled to the first input terminal of the pulse width modulator, the output terminal of the subcarrier generator is coupled to the second input terminal of the pulse width modulator, the output terminal of the pulse width modulator is coupled to the input terminal of the pulse amplifier, the output terminal of the pulse amplifier is coupled to the input terminal of the modulator, the output terminal of the modulator is coupled to the input terminal of the low-pass filter, and the output terminal of the low-pass filter is coupled to the input terminal of the power amplifier of the high-frequency module.

[0017] The transmitting module includes a radiation unit adapter, a radiation unit controller, and a radiation unit;

[0018] The input terminal of the radiation unit adapter is coupled to the output terminal of the high-frequency bandpass filter for transmitting radio frequency signals to the radiation unit. The radiation unit controller is communicatively connected to the control module for receiving instructions from the control module to adjust the emission direction and emission angle of the radiation unit.

[0019] The control module is communicatively connected to the counter-emission component and the radiation unit controller, and is used to control the counter-emission component, monitor the status of the equipment, and interact with the user.

[0020] Preferably, in the low-frequency module, the low-frequency signal generated by the crystal oscillator and the low-frequency pulse signal generated by the subcarrier generator are input to the pulse width modulator. Baseband modulation is completed through duty cycle mapping to generate a pulse width encoded radio frequency pulse. The radio frequency pulse is amplified by the pulse amplifier with adjustable gain and then input to the modulator to shift the baseband pulse to the radio frequency carrier. The modulated radio frequency signal is then filtered by the low-pass filter to suppress harmonic components and purify the spectrum before being output to the power amplifier of the high-frequency module.

[0021] Preferably, in the high-frequency module, the radio frequency carrier signal generated by the exciter is amplified by the intermediate amplifier with adjustable gain and then input to the power combiner. The power combiner combines the amplified radio frequency carrier signal with the modulated radio frequency signal provided by the low-frequency module at the same frequency or orthogonally. The combined mixed signal is then filtered by the high-frequency bandpass filter to suppress out-of-band harmonics and purify the spectrum, and outputs a stable sine wave signal to the radiation unit adapter of the transmitting module.

[0022] Preferably, the modulator in the low-frequency module is an intermediate-frequency modulator.

[0023] Preferably, the crystal oscillator, subcarrier generator, pulse width modulator, and pulse amplifier in the low-frequency module, as well as the power amplifier, power combiner, and high-frequency bandpass filter in the high-frequency module, are integrated and installed in an electromagnetically shielded metal housing, and the modulator and low-pass filter in the low-frequency module are integrated in the same integrated circuit.

[0024] Preferably, the radiating element is an antenna.

[0025] Furthermore, the antenna is an omnidirectional horn antenna.

[0026] Preferably, the radiation unit controller includes a gimbal and a rotation system, the radiation unit is mounted on the gimbal, and the rotation system includes a main control chip, a stepper motor drive circuit, an azimuth stepper motor, and a pitch stepper motor.

[0027] The main control chip drives the azimuth stepper motor and / or the pitch stepper motor through the stepper motor drive circuit to adjust the emission direction and / or emission angle of the radiation unit.

[0028] Furthermore, the main control chip is the DRV8316.

[0029] Preferably, the control module includes a processor, a display screen, and an operation panel, and the control module is capable of sending signals containing operating status information and fault type information to the remote monitoring terminal.

[0030] Compared with the prior art, the beneficial effects achieved by this utility model are:

[0031] 1. The omnidirectional horn antenna uses directional and pitch stepper motors to adjust the antenna beam transmission direction and angle, achieving 360° azimuth and +60° to -45° pitch angle adjustment. Once the drone enters the coverage area of ​​the horn antenna, the device can interfere with and drive away the drone's working signal after activation. The stepper motor makes it easy to control the rotation degree and provides precise rotation, enabling accurate all-round monitoring of the drone's flight direction. It is convenient and quick to use.

[0032] 2. Strong radio frequency compatibility due to high and low frequency synthesis technology;

[0033] 3. By using pulse width coding modulation and bandpass filtering to suppress spurious radiation, the false trigger rate is reduced, and higher interference accuracy is achieved;

[0034] 4. The radiation unit controller uses a stepper motor (DRV8316 driver) to achieve millisecond-level beam steering, resulting in faster response speed;

[0035] 5. The shielded housing and integrated circuit design block external electromagnetic detection and resist reverse interference;

[0036] 6. The control module supports remote status reporting (running data / fault codes) and dynamic strategy adjustment, improving the overall intelligent management and control of the device. Attached Figure Description

[0037] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0038] Figure 1 This is a schematic diagram of the signal processing of this utility model;

[0039] Figure 2 This is a schematic diagram of the signal processing flow of the transmitting module of this utility model;

[0040] Figure 3 This is a schematic diagram of the launch module structure of this utility model. Detailed Implementation

[0041] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0042] Example 1

[0043] like Figure 1-3 As shown in this embodiment, the working process of the drone harassment defense device for key areas is as follows:

[0044] Interference signal generation:

[0045] The low-frequency module generates baseband encoded pulses (signals generated by the crystal oscillator / subcarrier generator are sent to the pulse width modulator), which are then amplified, modulated at intermediate frequency, and filtered at low frequency before being input to the high-frequency module power amplifier.

[0046] The high-frequency module generates an RF carrier (the exciter is a high-frequency exciter, and the signal generated by the high-frequency exciter is sent to the intermediate amplifier), which is mixed with the low-frequency signal in the power combiner, and then a pure synthesized signal is output after high-frequency bandpass filtering.

[0047] Directional launch control:

[0048] The control module allows you to set interference parameters (frequency band / power / scanning mode) via the operation panel.

[0049] The radiating unit controller receives the command, and the DRV8316 chip drives the azimuth / elevation stepper motor to rotate the gimbal, so that the antenna beam of the omnidirectional horn antenna is aligned with the target airspace (360° azimuth angle, +60° to -45° elevation angle adjustable).

[0050] Status monitoring and protection:

[0051] The high-power circuit is encased in a shielded metal box (which can be made of aluminum alloy with a wall thickness of not less than 2mm). The intermediate frequency modulator and low-pass filter are integrated into a single circuit board using GaAs technology. Finally, single-board integration is achieved through multi-chip modules or system-in-package.

[0052] The processor monitors the voltage / temperature of each node in real time, and sends a fault code (such as "ERR-PA-OVERTEMP") to the monitoring center via 4G module / Bluetooth module / wired transmission when an anomaly occurs.

[0053] Example 2:

[0054] The radiating element adopts a pyramidal horn (rectangular cross-section) antenna (1.5GHz / 5.8GHz) with a gain ≥8dBi. Through the gradually unfolding horn-shaped structure, it achieves a smooth transition of wave impedance, effectively reducing the standing wave ratio, thereby reducing reflection loss and improving radiation efficiency. Its main function is to radiate the countermeasure signal in a specific direction, thereby improving interference efficiency and directivity.

[0055] Adding two ridge structures between the waveguide section and the horn opening section creates a double-ridged horn antenna. The waveguide section is divided into a feeding structure and a back cavity. The back cavity filters out the higher-order modes excited within the waveguide, and the ridge waveguide lowers the cutoff frequency of the main mode transmission, thereby achieving the goal of widening the bandwidth.

[0056] Example 3:

[0057] The high-frequency module and the low-frequency module are connected by two low-loss RF cables (one main and one backup). The low-frequency module generates an intermediate frequency signal, which is purified by a low-pass filter and then sent to the high-frequency module to complete the RF signal conversion.

[0058] When the equipment is powered on and running normally, the crystal oscillator generates a 10MHz reference frequency source. At this time, the subcarrier generator generates a low-frequency pulse signal. The two signals complete the primary modulation of the low-frequency signal in the pulse width modulator to obtain a frequency signal of 70±5MHz. After the signal power is amplified by the pulse amplifier, it is sent to the intermediate frequency modulator to shift the frequency of the signal to a higher frequency again. At this time, a 100M to 3G intermediate frequency signal is generated. After being sent to the low-pass filter for signal purification, the signal is sent to the high-frequency module.

[0059] A high-frequency exciter generates a radio frequency (RF) signal, which is then amplified to a sufficiently high power level by an intermediate amplifier before being sent to a power amplifier. The power amplifier, power combiner, and high-frequency bandpass filter are housed in a shielded metal box. Inside the metal box, the RF signal generated by the exciter and the intermediate frequency (IF) signal from the low-frequency module are amplified, combined by the power combiner, and then filtered by the high-frequency bandpass filter to remove unwanted harmonics (noise) and become a sine wave. The purified RF signal is then sent to the radiating element adapter (antenna adapter). At this point, the signal level impedance is adjusted to a reasonable reference value suitable for the transmission requirements of the radiating element (omnidirectional horn antenna). Under the drive of the radiating element controller (antenna controller), the signal is then transmitted by the omnidirectional horn antenna.

[0060] Example 4:

[0061] The gimbal's rotation system includes a main control chip, a stepper motor drive circuit, an azimuth stepper motor, and a pitch stepper motor. The coordinated operation of the main control chip and the stepper motor drive circuit ensures the gimbal's stability and accuracy.

[0062] Main control chip

[0063] The driver chip used is the DRV8316, which has a rich internal structure, with three half-bridge driver circuits as one of the core components. Each half-bridge is equipped with overcurrent protection circuitry to prevent current overload. In addition, the chip also includes a charge pump, which functions similarly to a miniature transformer, mainly for voltage regulation, especially for step-down operations.

[0064] The DRV8313 chip is fully functional and requires only a 12V DC power supply to operate. It integrates a charge pump that can output 3.3V to provide a stable power supply for the chip. The chip also provides three low-voltage signal input terminals, three wiring terminals, and reset and sleep pin ports.

[0065] Stepper motor

[0066] The omnidirectional horn antenna is driven to rotate by a stepper motor, thereby controlling the adjustment of the field of view.

[0067] The stepper motor drive circuit is designed based on the DRV8313 chip and can be regarded as a voltage amplifier circuit. Since the microcontroller must drive it through an amplifier circuit, a four-phase stepper motor (azimuth stepper motor and pitch stepper motor) is selected. Each stepper motor is controlled by a four-bit I / O port. Therefore, the lower four bits of the P2 port of the DRV8313 chip control the horizontal direction motor and the higher four bits control the pitch direction motor.

[0068] Example 5:

[0069] The control module is responsible for managing the operation of the entire device. The operation panel has an operation menu, which can perform corresponding functions according to different user needs. Interference parameters, including frequency band, power, and scanning mode (rotational or fixed angle), can be set to enable user interaction.

[0070] When a fault occurs in certain parts of the device, the processor of the control module can prevent the device from starting up or block the device's output, switch to the backup equipment, and at the same time give a fault alarm indication to the computer room.

Claims

1. A device for defending against unmanned aerial vehicle (UAV) harassment in key areas, characterized in that, include: A counter-emission assembly, comprising a high-frequency module, a low-frequency module, and a transmission module; Control module; A power supply module is used to supply power to the control module and the counter-emission component; in, The high-frequency module includes an exciter, an intermediate amplifier, a power amplifier, a power combiner, and a high-frequency bandpass filter connected in sequence. The low-frequency module includes a crystal oscillator, a subcarrier generator, a pulse width modulator, a pulse amplifier, a modulator, and a low-pass filter; The output terminal of the crystal oscillator is coupled to the first input terminal of the pulse width modulator, the output terminal of the subcarrier generator is coupled to the second input terminal of the pulse width modulator, the output terminal of the pulse width modulator is coupled to the input terminal of the pulse amplifier, the output terminal of the pulse amplifier is coupled to the input terminal of the modulator, the output terminal of the modulator is coupled to the input terminal of the low-pass filter, and the output terminal of the low-pass filter is coupled to the input terminal of the power amplifier of the high-frequency module. The transmitting module includes a radiation unit adapter, a radiation unit controller, and a radiation unit; The input terminal of the radiation unit adapter is coupled to the output terminal of the high-frequency bandpass filter for transmitting radio frequency signals to the radiation unit. The radiation unit controller is communicatively connected to the control module for receiving instructions from the control module to adjust the emission direction and emission angle of the radiation unit. The control module is communicatively connected to the counter-emission component and the radiation unit controller, and is used to control the counter-emission component, monitor the status of the equipment, and interact with the user.

2. The anti-drone harassment device for key areas according to claim 1, characterized in that: In the low-frequency module, the low-frequency signal generated by the crystal oscillator and the low-frequency pulse signal generated by the subcarrier generator are input to the pulse width modulator. Baseband modulation is completed through duty cycle mapping to generate a pulse width encoded baseband pulse. The baseband pulse is then amplified by the pulse amplifier with adjustable gain and input to the modulator. The modulator shifts the baseband pulse to the radio frequency carrier. The modulated radio frequency signal is then filtered by the low-pass filter to suppress harmonic components and purify the spectrum before being output to the power amplifier of the high-frequency module.

3. The anti-drone harassment device for key areas according to claim 1, characterized in that: In the high-frequency module, the radio frequency carrier signal generated by the exciter is amplified by the intermediate amplifier with adjustable gain and then input to the power combiner. The power combiner combines the amplified radio frequency carrier signal with the modulated radio frequency signal provided by the low-frequency module at the same frequency or orthogonally. The combined mixed signal is then filtered by the high-frequency bandpass filter to suppress out-of-band harmonics and purify the spectrum, and outputs a stable sine wave signal to the radiation unit adapter of the transmitting module.

4. The anti-drone harassment device for key areas according to claim 1, characterized in that: The modulator in the low-frequency module is an intermediate-frequency modulator.

5. The anti-drone harassment device for key areas according to claim 1, characterized in that: The crystal oscillator, subcarrier generator, pulse width modulator, and pulse amplifier in the low-frequency module, as well as the power amplifier, power combiner, and high-frequency bandpass filter in the high-frequency module, are integrated and installed in an electromagnetically shielded metal housing. The modulator and low-pass filter in the low-frequency module are integrated into the same integrated circuit.

6. The anti-drone harassment device for key areas according to claim 1, characterized in that: The radiating element is an antenna.

7. The anti-drone harassment device for key areas according to claim 6, characterized in that: The antenna is an omnidirectional horn antenna.

8. The anti-drone harassment device for key areas according to claim 1, characterized in that: The radiation unit controller includes a gimbal and a rotation system. The radiation unit is mounted on the gimbal. The rotation system includes a main control chip, a stepper motor drive circuit, an azimuth stepper motor, and a pitch stepper motor. The main control chip drives the azimuth stepper motor and / or the pitch stepper motor through the stepper motor drive circuit to adjust the emission direction and / or emission angle of the radiation unit.

9. The anti-drone harassment device for key areas according to claim 8, characterized in that: The main control chip used is DRV8316.

10. The anti-drone harassment device for key areas according to claim 1, characterized in that: The control module includes a processor, a display screen, and an operation panel. The control module is capable of sending signals containing operating status information and fault type information to a remote monitoring terminal.

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