Stepless frequency conversion directional antenna and electromagnetic remote control equipment countermeasure device

Abstract

The present invention discloses a stepless frequency conversion directional antenna and an electromagnetic remote control device countermeasure device. The stepless frequency conversion directional antenna of the present invention comprises a metal spiral wire, a reflector, an interference signal generator, and a support rod located at the axis of the metal spiral wire. The metal spiral wire is located at the center of the reflector, and the interference signal generator is connected to the metal spiral wire through a signal transmission feeder. By driving the reflector and the metal spiral wire to rotate relative to each other, the length and number of turns of the metal spiral wire on the front of the reflector are adjusted, so that the metal spiral wire on the front of the reflector can emit electromagnetic waves corresponding to the frequency emitted by the interference signal generator. The electromagnetic remote control device countermeasure device of the present invention realizes automatic patrolling of the countermeasure device to counter the remote control device that breaks into the restricted area by installing a stepless frequency conversion directional antenna on the walking mechanism.

Description

Technical Field

[0001] The present invention relates to the technical field of countermeasures for electromagnetic remote control equipment such as unmanned aerial vehicles (UAVs), and in particular to a stepless frequency-variable directional antenna and a countermeasure device for electromagnetic remote control equipment. Background Art

[0002] With the development of electromagnetic remote control equipment technology such as drones, remote-controlled reconnaissance vehicles, and remote-controlled robots, civil aviation safety has been affected. As the above safety issues become more prominent, the corresponding technology of anti-electromagnetic remote control equipment is in urgent need of development. However, since the electromagnetic wave control frequencies of drones, reconnaissance vehicles, robots and other equipment are not the same, countermeasure equipment that can only emit a single electromagnetic wave interference frequency cannot solve the above safety issues.

[0003] The helical antenna is a type of directional antenna. Its general structure includes a metal helical wire and a reflector. Generally, a helical wire is set on a reflector to transmit a specific electromagnetic wave frequency. If multiple electromagnetic wave frequencies need to be transmitted, multiple reflectors and multiple helical wires with different radii are used. Therefore, the helical antenna with multiple transmission frequencies is relatively large and inconvenient to carry. Existing directional antennas and omnidirectional antennas cannot achieve the function of stepless frequency conversion. Summary of the invention

[0004] In view of this, one of the purposes of the present invention is to provide a stepless frequency-variable directional antenna, through which continuous frequency modulation of interference frequencies can be achieved, thereby counteracting remote control devices under different frequency control.

[0005] The present invention solves the above technical problems by the following technical means:

[0006] A stepless frequency-variable directional antenna of the present invention comprises a metal spiral wire, a reflector, an interference signal generator, and a support rod located at the axis of the metal spiral wire, wherein the metal spiral wire is located at the center of the reflector, the interference signal generator is connected to the metal spiral wire through a signal transmission feeder, a through hole A is provided at the center of the reflector, the support rod passes through the through hole A, the through hole A is provided in accordance with the spiral direction of the spiral wire, a through hole B is provided at a position of the reflector close to the through hole A, the metal spiral wire passes through the through hole B so that a part of the metal spiral wire is located on the front side of the reflector and another part is located on the back side of the reflector, the pitch of the metal spiral wire located on the front side of the reflector is greater than the diameter of the cross section of the metal spiral wire, and the coils of the metal spiral wire located on the back side of the reflector are closely adjacent to each other and are mutually conductive; it also comprises an electromagnetic telescopic cylinder that drives the support rod to reciprocate along its own axial direction and a motor A that drives the reflector and the metal spiral wire to rotate relative to each other; it also comprises a motor B that drives the electromagnetic telescopic cylinder to rotate around the axial direction of the support rod.

[0007] Furthermore, it also includes a bracket supporting the reflective plate, a cylinder is coaxially arranged on the back of the reflective plate, a metal spiral wire located on the back of the reflective plate is arranged in the cylinder, the cylinder and the bracket are circumferentially rotated and axially fixedly connected, a driven gear is arranged on the outer circumferential surface of the cylinder, the motor A is arranged on the bracket, and a driving gear is arranged on the power output shaft of the motor A, and the driving gear and the driven gear are meshed with each other.

[0008] Furthermore, it also includes a cylindrical base for positioning the metal spiral wire located on the back of the reflector, the metal spiral wire is sleeved on the cylindrical base, the cylindrical base and the reflector are coaxially arranged, the cylindrical base is fixed on the bracket, the cylindrical base and the bracket are insulated from each other, one end of the cylindrical base extends into the cylinder, one end of the metal spiral wire is fixed on the cylindrical base, the support rod passes through the cylindrical base, the cylindrical base is made of conductive material, and the cylindrical base and the metal spiral wire are conductive to each other.

[0009] Furthermore, the interference signal generator adopts a digitally controlled frequency modulation signal generator.

[0010] The second purpose of the present invention is to provide an electromagnetic remote control device countermeasure device, which can counter many electromagnetic remote control devices under different frequency control by carrying a stepless frequency conversion directional antenna.

[0011] The present invention solves the above technical problems by the following technical means:

[0012] The electromagnetic remote control device countermeasure device of the present invention comprises a walking mechanism with an automatic walking function, an electric pan-tilt platform arranged on the walking mechanism, the stepless frequency conversion directional antenna is arranged on the electric pan-tilt platform through a bracket, and a controller, a detection device for detecting the electromagnetic remote control device and the interference signal generator are installed on the walking mechanism.

[0013] Furthermore, the detection device includes one or more of a camera, a thermal infrared sensor, and a radar, and the controller is respectively connected to the detection device, an interference signal generator, an electromagnetic telescopic cylinder, a motor A, a motor B, and an electric pan-tilt circuit.

[0014] Furthermore, the walking mechanism is a robot or an automatic driving car.

[0015] Beneficial effects of the present invention:

[0016] 1) The stepless frequency-variable directional antenna of the present invention adjusts the length and number of turns of the metal spiral wire on the front side of the reflector by driving the reflector and the metal spiral wire to rotate relative to each other, so that the metal spiral wire on the front side of the reflector can emit electromagnetic waves corresponding to the frequency emitted by the interference signal generator.

[0017] 2) The electromagnetic remote control device countermeasure device of the present invention realizes automatic patrolling of the countermeasure device to counter the remote control device that enters the restricted area by installing a stepless frequency-variable directional antenna on the walking mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the stepless frequency-variable directional antenna of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the stepless frequency conversion directional antenna of the present invention, in which the reflector is cut away;

[0021] Figure 3 It is a structural schematic diagram of a reflector in a stepless frequency-variable directional antenna of the present invention;

[0022] Figure 4 It is a schematic structural diagram of the countermeasure device of the electromagnetic remote control equipment of the present invention. DETAILED DESCRIPTION

[0023] The present invention will be described in detail below with reference to the accompanying drawings:

[0024] Embodiment 1 A stepless frequency conversion directional antenna

[0025] like Figure 1-3As shown, a stepless frequency-variable directional antenna in this embodiment includes a metal spiral wire 1, a reflector 2, an interference signal generator, and a support rod 3 located at the axis of the metal spiral wire 1, wherein the metal spiral wire 1 is located at the center of the reflector 2, and the interference signal generator is connected to the metal spiral wire 1 through a signal transmission feeder. The interference signal generator adopts a digitally controlled frequency modulation signal generator, and specifically, DDS technology can be adopted. DDS technology has the advantages of relatively wide bandwidth, short frequency conversion time, high frequency resolution, etc., and is widely used in high-precision frequency synthesis and arbitrary signal generation; a through hole A4 is provided at the center of the reflector 2, and the support rod 3 passes through the through hole A, and the through hole A is arranged along the The spiral wire is arranged in the spiral direction, and a through hole B5 is arranged at a position of the reflecting plate 2 near the through hole A. The metal spiral wire 1 passes through the through hole B5 so that a part of the metal spiral wire 1 is located on the front side of the reflecting plate 2 and the other part is located on the back side of the reflecting plate 2. The pitch of the metal spiral wire 1 located on the front side of the reflecting plate 2 is greater than the diameter of the cross section of the metal spiral wire 1, and the coils of the metal spiral wire 1 located on the back side of the reflecting plate 2 are closely adjacent to each other and are conductive to each other; it also includes an electromagnetic telescopic cylinder 6 that drives the support rod 3 to reciprocate along its own axial direction and a motor A7 that drives the reflecting plate 2 and the metal spiral wire 1 to rotate relative to each other; it also includes a motor B12 that drives the electromagnetic telescopic cylinder to rotate around the axial direction of the support rod. Specifically, it also includes a bracket 9 for supporting the reflector 2, a cylinder is coaxially arranged on the back of the reflector 2, and the metal spiral wire 1 located on the back of the reflector 2 is arranged in the cylinder, the cylinder and the bracket are circumferentially rotated and axially fixedly connected, a driven gear 8 is arranged on the outer circumferential surface of the cylinder, the motor A is arranged on the bracket 9, and a driving gear 10 is arranged on the power output shaft of the motor A, and the driving gear and the driven gear are meshed with each other; it also includes a cylindrical base 11 for positioning the metal spiral wire 1 located on the back of the reflector 2, the metal spiral wire 1 is sleeved on the cylindrical base, the cylindrical base is coaxially arranged with the reflector 2, the cylindrical base is fixed on the bracket 9, the cylindrical base and the bracket are insulated from each other, one end of the cylindrical base 11 extends into the cylinder, one end of the metal spiral wire 1 is fixed on the cylindrical base, the support rod 3 passes through the cylindrical base, the cylindrical base is made of conductive material, and the cylindrical base and the metal spiral wire 1 are conductive to each other.

[0026] The working principle of the stepless frequency conversion directional antenna in this embodiment is as follows:

[0027] Before emitting interfering electromagnetic waves, the cylinder and the reflector are first driven to rotate by motor A, and the through hole B on the reflector releases the metal spiral wire on the back of the reflector to the front of the reflector or compresses the metal spiral wire on the front of the reflector back into the cylinder, so that the length of the metal spiral wire on the front of the reflector adapts to the frequency of the interfering radio waves to be emitted; then the electromagnetic telescopic cylinder 6 pushes the support rod to adjust the length of the support rod on the front of the reflector, and further the motor B drives the support rod to rotate, so as to control the number of turns, pitch and spiral diameter of the metal spiral wire, so that the above parameters meet the frequency of the interfering radio waves to be emitted.

[0028] When working, the CNC frequency modulation signal generator transmits signals to the metal spiral wire 1 through the transmission jumper, and the metal spiral wire correspondingly emits corresponding electromagnetic waves to interfere with remote control devices such as drones, reconnaissance vehicles, and robots.

[0029] Embodiment 2: A device for countering electromagnetic remote control equipment

[0030] like Figure 4 As shown, the electromagnetic remote control device countermeasure device in this embodiment includes an automatic driving car 13 with an automatic driving function, and an electric pan-tilt head 14 arranged on a walking mechanism. The stepless frequency conversion directional antenna is arranged on the electric pan-tilt head 14 through a bracket. The walking mechanism is equipped with a controller, a detection device for detecting the electromagnetic remote control device, and the interference signal generator. In this embodiment, the detection device is a camera, and the direction of the camera is consistent with the direction of the metal spiral wire. The controller is respectively connected to the camera 15, the interference signal generator, the electromagnetic telescopic cylinder, the motor A, the motor B, and the electric pan-tilt head circuit.

[0031] When working, the electric pan / tilt adjusts the direction of the camera to search for targets. The camera sends image data to the controller, which uses image recognition technology to capture illegal remote control devices that appear in the picture. The controller controls the stepless frequency-variable directional antenna to transmit the corresponding interference frequency to the illegal remote control devices according to the type of illegal remote control devices.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A stepless frequency conversion directional antenna, comprising a metal spiral wire, a reflector, an interference signal generator, and a support rod located at the axis of the metal spiral wire, wherein the metal spiral wire is located at the center of the reflector, and the interference signal generator is connected to the metal spiral wire through a signal transmission feeder, characterized in that: A through hole A is provided at the center of the reflector, the support rod passes through the through hole A, the through hole A is provided in accordance with the spiral direction of the spiral wire, a through hole B is provided at a position of the reflector close to the through hole A, the metal spiral wire passes through the through hole B so that a part of the metal spiral wire is located on the front side of the reflector and another part is located on the back side of the reflector, the pitch of the metal spiral wire located on the front side of the reflector is greater than the diameter of the cross section of the metal spiral wire, and the coils of the metal spiral wire located on the back side of the reflector are closely adjacent to each other and are electrically conductive to each other; and also includes driving the support rod to reciprocate along its own axial direction. The invention also includes an electromagnetic telescopic cylinder and a motor A for driving the relative rotation between the reflective plate and the metal spiral wire; it also includes a motor B for driving the electromagnetic telescopic cylinder to rotate axially around the support rod; it also includes a bracket supporting the reflective plate, the back of the reflective plate is coaxially provided with a cylinder, the metal spiral wire located on the back of the reflective plate is arranged in the cylinder, the cylinder and the bracket are matched in circumferential rotation and axially fixedly connected, a driven gear is arranged on the outer circumferential surface of the cylinder, the motor A is arranged on the bracket, and a driving gear is arranged on the power output shaft of the motor A, and the driving gear and the driven gear are meshed with each other; The stepless frequency-variable directional antenna adopts the following method for frequency conversion: before emitting interfering electromagnetic waves, the cylinder and the reflector are first driven to rotate by the motor A, and the through hole B on the reflector releases the metal spiral wire on the back of the reflector to the front of the reflector or compresses the metal spiral wire on the front of the reflector back into the cylinder, so that the length of the metal spiral wire located on the front of the reflector adapts to the frequency of the interfering radio waves to be emitted; then the support rod is pushed by the electromagnetic telescopic cylinder to adjust the length of the support rod located on the front of the reflector, and the support rod is further driven to rotate by the motor B, so as to control the number of turns, pitch and spiral diameter of the metal spiral wire, so that the above parameters meet the frequency of the interfering radio waves to be emitted.

2. The stepless frequency conversion directional antenna according to claim 1, characterized in that: It also includes a cylindrical base for positioning the metal spiral wire on the back of the reflector, the metal spiral wire is sleeved on the cylindrical base, the cylindrical base is coaxially arranged with the reflector, the cylindrical base is fixed on the bracket, the cylindrical base and the bracket are insulated from each other, one end of the cylindrical base extends into the cylinder, one end of the metal spiral wire is fixed on the cylindrical base, the support rod passes through the cylindrical base, the cylindrical base is made of conductive material, and the cylindrical base and the metal spiral wire are conductive to each other.

3. The stepless frequency conversion directional antenna according to claim 2, characterized in that: The interference signal generator adopts a digitally controlled frequency modulation signal generator.

4. An electromagnetic remote control device countermeasure device equipped with the stepless frequency conversion directional antenna as claimed in claim 1, characterized in that: It includes a walking mechanism with automatic walking function and an electric pan-tilt platform arranged on the walking mechanism. The stepless frequency-variable directional antenna is arranged on the electric pan-tilt platform through a bracket. The walking mechanism is equipped with a controller, a detection device for detecting electromagnetic remote control equipment and the interference signal generator.

5. The electromagnetic remote control device countermeasure device according to claim 4, characterized in that: The detection device includes one or more of a camera, a thermal infrared sensor, and a radar, and the controller is respectively connected to the detection device, an interference signal generator, an electromagnetic telescopic cylinder, a motor A, a motor B, and an electric pan-tilt circuit.

6. The electromagnetic remote control device countermeasure device according to claim 5, characterized in that: The walking mechanism is a robot or an automatic driving car.

Images