A strong anti-interference compass antenna assembly applied to a unmanned aerial vehicle and a control method thereof

Abstract

The application relates to a strong anti-interference Beidou antenna assembly applied to a UAV and a control method thereof, which comprises a first image transmission antenna, a second image transmission antenna, a Beidou antenna, a driving unit connected with the Beidou antenna and used for driving the Beidou antenna to complete lifting and rotating actions, a first detection unit and a second detection unit respectively connected with the first image transmission antenna and the second image transmission antenna to correspondingly acquire working state information of the first image transmission antenna and the second image transmission antenna, and a control unit connected with the driving unit, the first detection unit and the second detection unit. The application can dynamically adjust the signal receiving surface direction of the Beidou antenna according to the working state of the image transmission antenna, so as to reduce the signal interference intensity of the Beidou antenna caused by the image transmission antenna in a signal transmission state.

Description

Technical Field

[0001] The present invention relates to the field of communication equipment, and in particular to a strong anti-interference Beidou antenna component applied to unmanned aerial vehicles and a control method thereof. Background Art

[0002] Drone hangars, drones, and other equipment are typically equipped with positioning antennas (such as Beidou antennas and GPS antennas) for positioning and image transmission antennas for data transmission. Since the 1.4 GHz frequency band can also be used for image transmission antennas, it can cause signal interference to positioning antennas with higher reception sensitivity requirements, such as Beidou antennas in the 1.575 GHz band.

[0003] At the same time, due to the limited installation space of drone hangars, drones and other equipment, the distance between different types of antennas cannot be flexibly adjusted, which leads to the interference of image transmission antennas on positioning antennas being particularly prominent. Summary of the Invention

[0004] The purpose of the present invention is to provide a highly anti-interference Beidou antenna assembly and a control method thereof for use in unmanned aerial vehicles. The assembly can dynamically adjust the signal receiving surface orientation of the Beidou antenna according to the working state of the image transmission antenna, so as to reduce the signal interference intensity caused by the image transmission antenna in the signal transmission state to the Beidou antenna.

[0005] To achieve the above objectives, the embodiments of the present invention provide the following technical solutions.

[0006] On the one hand, a strong anti-interference Beidou antenna assembly for use in unmanned aerial vehicles is provided, which includes:

[0007] First image transmission antenna, second image transmission antenna;

[0008] Beidou antenna;

[0009] A driving unit, connected to the Beidou antenna, configured to drive the Beidou antenna to perform lifting and rotating movements;

[0010] The first detection unit and the second detection unit are connected to the first image transmission antenna and the second image transmission antenna respectively to obtain the working status information of the first image transmission antenna and the second image transmission antenna respectively;

[0011] and a control unit, which is respectively connected to the driving unit, the first detection unit, and the second detection unit, and is used to control the operation of the driving unit when the first detection unit starts to transmit a signal, so as to drive the Beidou antenna to rise to a predetermined height position through the driving unit, and drive the Beidou antenna at the predetermined height position to rotate so that the signal receiving surface of the Beidou antenna faces away from the first image transmission antenna;

[0012] Alternatively, when the second detection unit starts signal transmission, the driving unit is controlled to drive the Beidou antenna to rise to a predetermined height position through the driving unit, and drive the Beidou antenna located at the predetermined height position to rotate, so that the signal receiving surface of the Beidou antenna faces away from the second image transmission antenna.

[0013] Preferably, the value range of the angle α formed by the plane where the vertical center axis of the first image transmission antenna and the vertical center axis of the Beidou antenna are located and the plane where the vertical center axis of the second image transmission antenna and the vertical center axis of the Beidou antenna are located is [120°, 180°].

[0014] Preferably, the working status information includes whether the first image transmission antenna and the second image transmission antenna have started signal transmission.

[0015] Preferably, when the signal receiving surface of the Beidou antenna faces away from the first image transmission antenna, the value range of the angle β1 formed by the signal receiving surface and the vertical central axis of the first image transmission antenna is [15°, 60°].

[0016] Preferably, when the signal receiving surface of the Beidou antenna faces away from the second image transmission antenna, the value range of the angle β2 formed by the signal receiving surface and the vertical central axis of the second image transmission antenna is [15°, 60°].

[0017] Preferably, when the Beidou antenna rotates, its rotation plane is parallel to or coincides with the plane where the vertical center axis of the first image transmission antenna and the vertical center axis of the second image transmission antenna are located.

[0018] Preferably, the antenna assembly further includes: a reflective layer connected to the bottom of the Beidou antenna and capable of rotating synchronously with the Beidou antenna.

[0019] Preferably, the reflective layer is made of metal material.

[0020] Preferably, the antenna assembly further includes: at least two filters, and all filters are connected in series with the Beidou antenna to filter the signals received by the Beidou antenna.

[0021] On the other hand, a control method for a strong anti-interference Beidou antenna assembly applied to a UAV is also provided, which comprises the following steps:

[0022] Acquiring the working status information of the first image transmission antenna and the second image transmission antenna in real time through the first detection unit and the second detection unit to determine whether the first image transmission antenna and the second image transmission antenna have started signal transmission;

[0023] When the first image transmission antenna starts transmitting signals and the second image transmission antenna has not yet started transmitting signals, the driving unit drives the Beidou antenna to rise to a predetermined height position, and further drives the Beidou antenna at the predetermined height position to rotate so that the signal receiving surface of the Beidou antenna faces away from the first image transmission antenna;

[0024] Alternatively, when the second image transmission antenna starts to transmit signals and the first image transmission antenna has not yet started to transmit signals, the driving unit drives the Beidou antenna to rise to a predetermined height position, and further drives the Beidou antenna at the predetermined height position to rotate, so that the signal receiving surface of the Beidou antenna is facing away from the second image transmission antenna.

[0025] Compared with the prior art, the present invention has the following technical effects:

[0026] The antenna assembly structure of the present invention is simple in design and is particularly suitable for equipment with limited installation space, such as drone hangars and drones. It can dynamically adjust the signal receiving surface orientation of the Beidou antenna according to the working status of the first image transmission antenna and the second image transmission antenna to reduce the signal interference intensity caused by the image transmission antenna in the signal transmission state to the Beidou antenna. At the same time, the background noise is filtered through multiple series filters, so that the Beidou signal can meet the demodulation threshold of the Beidou signal receiving module even in the case of strong interference, thereby ensuring the performance of the Beidou antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is the overall structural diagram of the Beidou antenna and image transmission antenna in the present invention;

[0028] Figure 2 This is a schematic diagram of the overall structure of the strong anti-interference Beidou antenna assembly used in the UAV of the present invention;

[0029] Figure 3 This is a schematic diagram of the state when the signal receiving surface of the Beidou antenna in the present invention faces away from the first image transmission antenna;

[0030] Figure 4 This is a schematic diagram of the state when the signal receiving surface of the Beidou antenna in the present invention faces away from the second image transmission antenna;

[0031] Figure 5 is the noise floor of the Beidou antenna signal at different β1 and β2 angles in the present invention;

[0032] Figure 6 This is a structural diagram of the present invention when multiple filters are connected in series with the Beidou antenna.

[0033] In the figure: 1. First image transmission antenna; 1', second image transmission antenna; 2. Beidou antenna; 21. Signal receiving surface; 3. Drive unit; 4. First detection unit; 4', second detection unit; 5. Control unit; 6. Reflection layer; 7. Filter; 8. Beidou signal receiving module; 100. UAV hangar. DETAILED DESCRIPTION

[0034] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described below with reference to the accompanying drawings. Example 1

[0035] like Figure 1-2 As shown, this embodiment provides a strong anti-interference Beidou antenna assembly for use in unmanned aerial vehicles, which includes:

[0036] The first image transmission antenna 1 and the second image transmission antenna 1 ′ both form an angle of 90° with the horizontal plane.

[0037] Beidou antenna 2, and the angle α formed by the plane s1 where the vertical center axis Y1 of the first image transmission antenna 1 and the vertical center axis Y2 of the Beidou antenna 2 are located and the plane s2 where the vertical center axis Y1' of the second image transmission antenna 1' and the vertical center axis Y2 of the Beidou antenna 2 are located is in the range of [120°, 180°] (preferably [150°, 180°]); in this embodiment, the first image transmission antenna 1, the second image transmission antenna 1', and the Beidou antenna 2 can all be installed in the drone hangar 100, or can be installed on the drone.

[0038] The driving unit 3 is connected to the Beidou antenna 2 and is used to drive the Beidou antenna 2 to complete lifting and rotation movements. In this embodiment, the driving unit 3 includes lifting and deflection structures such as a steering gear.

[0039] The first detection unit 4 and the second detection unit 4' are respectively connected to the first image transmission antenna 1 and the second image transmission antenna 1' to obtain the working status information of the first image transmission antenna 1 and the second image transmission antenna 1', wherein the working status information includes whether the first image transmission antenna 1 and the second image transmission antenna 1' have started signal transmission.

[0040] and a control unit 5, which is respectively connected to the driving unit 3, the first detection unit 4, and the second detection unit 4', and is used to control the driving unit 3 to operate when the first detection unit 4 starts signal transmission, so as to drive the Beidou antenna 2 to rise to a predetermined height position through the driving unit 3, and drive the Beidou antenna 2 at the predetermined height position to rotate so that the signal receiving surface 21 of the Beidou antenna 2 faces away from the first image transmission antenna 1. At this time, the angle β1 formed by the signal receiving surface 21 and the vertical central axis Y1 of the first image transmission antenna 1 is an acute angle, and the value range of β1 is [15°, 85°] (preferably [15°, 60°]);

[0041] Alternatively, when the second detection unit 4' starts signal transmission, the driving unit 3 is controlled to operate, so as to drive the Beidou antenna 2 to rise to a predetermined height position through the driving unit 3, and drive the Beidou antenna 2 located at the predetermined height position to rotate, so that the signal receiving surface 21 of the Beidou antenna 2 faces away from the second image transmission antenna 1', and the angle β2 formed by the signal receiving surface 21 and the vertical center axis Y1' of the second image transmission antenna 1' is an acute angle, and the value range of β2 is [15°, 85°] (preferably [15°, 60°]).

[0042] At the same time, when the Beidou antenna 2 rotates, its rotation plane is parallel to or coincides with the plane where the vertical center axis Y1 of the first image transmission antenna 1 and the vertical center axis Y1 ′ of the second image transmission antenna 1 ′ are located.

[0043] like Figure 2 As shown, when the first detection unit 4 and the second detection unit 4' determine that the first image transmission antenna 1 and the second image transmission antenna 1' have not started signal transmission, it means that the two image transmission antennas will not generate too much interference signals at this time. At this time, the signal receiving surface 21 of the Beidou antenna 2 is in a horizontal state, and this state can also be achieved by the driving unit 3.

[0044] like Figure 3 As shown, when the first detection unit 4 determines that the first image transmission antenna 1 starts signal transmission, and the second detection unit 4' determines that the second image transmission antenna 1' has not yet started signal transmission, the control unit 5 controls the driving unit 3 to drive the Beidou antenna 2 to rise to a predetermined height position through the driving unit 3, and further drives the Beidou antenna 2 at the predetermined height position to rotate so that the signal receiving surface 21 of the Beidou antenna 2 faces away from the first image transmission antenna 1;

[0045] like Figure 4As shown, when the second detection unit 4' determines that the second image transmission antenna 1' starts signal transmission, and the first detection unit 4 determines that the first image transmission antenna 1 has not started signal transmission, the control unit 5 controls the driving unit 3 to drive the Beidou antenna 2 to rise to a predetermined height position through the driving unit 3, and further drives the Beidou antenna 2 at the predetermined height position to rotate, so that the signal receiving surface 21 of the Beidou antenna 2 faces away from the second image transmission antenna 1'.

[0046] like Figure 5 As shown, the smaller the angles β1 and β2 are, the greater the amplitude of the Beidou antenna 2 away from the image transmission antenna, and the lower the signal noise floor. It should be noted that the calculated noise floor is usually a negative value. For the convenience of calculation and description, Figure 5 The background noise of the vertical axis is the absolute value.

[0047] Therefore, in this embodiment, the signal receiving surface direction of the Beidou antenna can be dynamically adjusted according to the working status of the first image transmission antenna and the second image transmission antenna, that is, whether signal transmission has started, so as to reduce the signal interference intensity caused by the image transmission antenna in the signal transmission state to the Beidou antenna. Example 2

[0048] The only difference between this embodiment and embodiment 1 is that Figure 2 ,6, the antenna assembly further includes: a reflective layer 6 connected to the bottom of the Beidou antenna 2 and capable of rotating synchronously with the Beidou antenna 2, which is used to reflect the signal to increase the upper hemisphere share of the Beidou antenna 2 and improve the gain. In this embodiment, the reflective layer 6 is made of metal materials such as copper;

[0049] Furthermore, there are at least two filters 7 , and all filters 7 are connected in series with the Beidou antenna 2 , for filtering the signals received by the Beidou antenna 2 .

[0050] Since the Beidou signal receiving module 8 has very high requirements for the signal strength of the received signal, the sensitivity often needs to reach -110dBm, and the maximum isolation of a single filter is 50dBm. Therefore, using a single filter for filtering cannot meet the signal filtering effect of the Beidou signal receiving module 8. Therefore, in this embodiment, multiple filters 7 are used in series with the Beidou antenna 2. After the Beidou signal is received by the Beidou antenna 2, it can be filtered in sequence through the series filters 7, so that the sideband noise floor is lower than the signal strength of the required frequency band, so as to meet the needs of demodulation and achieve the purpose of strong anti-interference. Example 3

[0051] This embodiment provides a method for controlling the antenna assembly described in Embodiment 1 or 2, which includes the following steps:

[0052] S1. Obtaining the working status information of the first image transmission antenna 1 and the second image transmission antenna 1' in real time through the first detection unit 4 and the second detection unit 4' to determine whether the first image transmission antenna 1 and the second image transmission antenna 1' have started signal transmission;

[0053] S2. When the first detection unit 4 determines that the first image transmission antenna 1 has started signal transmission, and the second detection unit 4' determines that the second image transmission antenna 1' has not started signal transmission, the control unit 5 controls the driving unit 3 to drive the Beidou antenna 2 to rise to a predetermined height position through the driving unit 3, and further drives the Beidou antenna 2 at the predetermined height position to rotate so that the signal receiving surface 21 of the Beidou antenna 2 faces away from the first image transmission antenna 1;

[0054] Alternatively, when the second detection unit 4' determines that the second image transmission antenna 1' has started signal transmission, and the first detection unit 4 determines that the first image transmission antenna 1 has not yet started signal transmission, the control unit 5 controls the driving unit 3 to drive the Beidou antenna 2 to rise to a predetermined height position through the driving unit 3, and further drives the Beidou antenna 2 at the predetermined height position to rotate, so that the signal receiving surface 21 of the Beidou antenna 2 faces away from the second image transmission antenna 1'.

[0055] To sum up, the antenna assembly structure in this application is simple in design and is particularly suitable for equipment with limited installation space such as drone hangars and drones. It can dynamically adjust the signal receiving surface direction of the Beidou antenna according to the working status of the first image transmission antenna and the second image transmission antenna, that is, whether signal transmission has started, so as to reduce the signal interference intensity caused by the image transmission antenna in the signal transmission state to the Beidou antenna. At the same time, the background noise is filtered through multiple series filters, so that the Beidou signal can meet the demodulation threshold of the Beidou signal receiving module even in the case of strong interference, thereby ensuring the performance of the Beidou antenna.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A strong anti-interference Beidou antenna assembly used in unmanned aerial vehicles, characterized in that: include: A first image transmission antenna (1), a second image transmission antenna (1'); BeiDou antenna (2); A driving unit (3), connected to the Beidou antenna (2), and used to drive the Beidou antenna (2) to perform lifting and rotating movements; A first detection unit (4) and a second detection unit (4'), which are respectively connected to the first image transmission antenna (1) and the second image transmission antenna (1') to obtain working status information of the first image transmission antenna (1) and the second image transmission antenna (1'); and a control unit (5), which is respectively connected to the driving unit (3), the first detection unit (4), and the second detection unit (4'), and is used to control the driving unit (3) to operate when the first detection unit (4) starts signal transmission, so as to drive the Beidou antenna (2) to rise to a predetermined height position through the driving unit (3), and drive the Beidou antenna (2) at the predetermined height position to rotate, so that the signal receiving surface (21) of the Beidou antenna (2) faces away from the first image transmission antenna (1); Alternatively, when the second detection unit (4') starts signal transmission, the driving unit (3) is controlled to operate, so as to drive the Beidou antenna (2) to rise to a predetermined height position through the driving unit (3), and drive the Beidou antenna (2) located at the predetermined height position to rotate, so that the signal receiving surface (21) of the Beidou antenna (2) faces away from the second image transmission antenna (1'); The value range of the angle α formed by the plane where the vertical center axis of the first image transmission antenna (1) and the vertical center axis of the Beidou antenna (2) are located and the plane where the vertical center axis of the second image transmission antenna (1') and the vertical center axis of the Beidou antenna (2) are located is [120°, 180°]; When the signal receiving surface (21) of the Beidou antenna (2) faces away from the first image transmission antenna (1), the value range of the angle β1 formed between the signal receiving surface and the vertical central axis of the first image transmission antenna (1) is [15°, 60°]; When the signal receiving surface (21) of the Beidou antenna (2) faces away from the second image transmission antenna (1'), the value range of the angle β2 formed by the signal receiving surface and the vertical central axis of the second image transmission antenna (1') is [15°, 60°].

2. The antenna assembly according to claim 1, wherein: The working status information includes whether the first image transmission antenna (1) and the second image transmission antenna (1') have started signal transmission.

3. The antenna assembly according to claim 1, wherein: When the Beidou antenna (2) rotates, its rotation plane is parallel to or coincides with the plane where the vertical center axis of the first image transmission antenna (1) and the vertical center axis of the second image transmission antenna (1') are located.

4. The antenna assembly according to claim 1, wherein: The antenna assembly further comprises: a reflection layer (6) connected to the bottom of the Beidou antenna and capable of rotating synchronously with the Beidou antenna.

5. The antenna assembly according to claim 4, wherein: The reflective layer (6) is made of metal material.

6. The antenna assembly according to claim 1, wherein: The antenna assembly further comprises: at least two filters (7), and all filters (7) are connected in series with the Beidou antenna (2) for filtering signals received by the Beidou antenna (2).

7. A control method for a strong anti-interference Beidou antenna assembly for use in a UAV, used for the antenna assembly according to any one of claims 1 to 6, characterized in that: The steps include: Acquiring corresponding working status information of the first image transmission antenna (1) and the second image transmission antenna (1') in real time through the first detection unit (4) and the second detection unit (4') to determine whether the first image transmission antenna (1) and the second image transmission antenna (1') have started signal transmission; When the first image transmission antenna (1) starts signal transmission and the second image transmission antenna (1') has not yet started signal transmission, the driving unit (3) drives the Beidou antenna (2) to rise to a predetermined height position, and further drives the Beidou antenna (2) at the predetermined height position to rotate, so that the signal receiving surface (21) of the Beidou antenna faces away from the first image transmission antenna (1); Alternatively, when the second image transmission antenna (1') starts signal transmission and the first image transmission antenna (1) has not yet started signal transmission, the driving unit (3) drives the Beidou antenna (2) to rise to a predetermined height position, and further drives the Beidou antenna (2) at the predetermined height position to rotate, so that the signal receiving surface (21) of the Beidou antenna faces away from the second image transmission antenna (1'); The value range of the angle α formed by the plane where the vertical center axis of the first image transmission antenna (1) and the vertical center axis of the Beidou antenna (2) are located and the plane where the vertical center axis of the second image transmission antenna (1') and the vertical center axis of the Beidou antenna (2) are located is [120°, 180°]; When the signal receiving surface (21) of the Beidou antenna (2) faces away from the first image transmission antenna (1), the value range of the angle β1 formed between the signal receiving surface and the vertical central axis of the first image transmission antenna (1) is [15°, 60°]; When the signal receiving surface (21) of the Beidou antenna (2) faces away from the second image transmission antenna (1'), the value range of the angle β2 formed by the signal receiving surface and the vertical central axis of the second image transmission antenna (1') is [15°, 60°].

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