Horizontal full-axial unmanned aerial vehicle airflow detection tower

Abstract

The utility model discloses a horizontal full-axial unmanned aerial vehicle airflow detection tower which comprises a shell, a combined disc bottom plate, a bin body, an outer air duct and a fan bin top. The combined disc bottom plate comprises a disc storage table and a fixed ring disc; the disc placement table is used for placing a to-be-tested unmanned aerial vehicle; the bin body is arranged on the fixed ring disc and comprises swinging blades, and the multiple swinging blades are sequentially stacked end to end in the axial direction of the fixed ring disc to form the bin body. The outer air duct is positioned outside the bin body and inside the shell; the fan bin top is arranged at the top of the whole device, is closed with the top of the shell and comprises a bin top and an axial flow fan, and the axial flow fan is arranged on the bin top; the multiple axial flow fan blades are arranged in the outer air duct and used for detecting the unmanned aerial vehicle by generating airflow. According to the design, the states of the unmanned aerial vehicle under different airflows are simulated, more flexibility and accuracy can be achieved, real-time adjustment can be conducted according to needs, and the aerodynamic performance test requirements under different flight states are met.

Description

Technical Field

[0001] The present application relates to the technical field of equipment wind tunnel testing, and in particular to a horizontal full-axial UAV airflow detection tower. Background Art

[0002] Aircraft will be disturbed by various airflows during flight, such as atmospheric turbulence, wind shear, etc. These airflow disturbances have a direct impact on the performance of the aircraft. Airflow detection of aircraft is a key link in improving aircraft safety, performance optimization and control guidance. By performing airflow detection, the stability of the aircraft under different airflow conditions can be evaluated, and its response to airflow can be understood, which helps to predict and control the attitude changes of the aircraft in advance to ensure the stability and safety of the flight.

[0003] In the existing wind tunnel testing technology, some aerodynamic performance test equipment may have some shortcomings, such as: 1. Limited directionality: Traditional wind tunnel equipment may only provide airflow simulation in a specific direction or range. This means that it is impossible to fully simulate the wind from different directions faced by the aircraft in the real flight environment. Since the aerodynamic performance of the aircraft is closely related to the incoming flow angle, the lack of full axial direction controllability will limit the accurate evaluation of the performance of the aircraft at various angles. 2. Insufficient simulation accuracy: Some equipment may not be able to accurately simulate the airflow conditions under specific flight conditions. For example, the turbulence effect during high-speed flight has an important impact on the aerodynamic performance of the aircraft, but the existing equipment may not be able to accurately reproduce this complex airflow dynamics. This affects the reliability and accuracy of the test results and limits the comprehensive evaluation of the aircraft performance. 3. Poor adjustment flexibility: Traditional wind tunnel test equipment has limitations in the control of airflow direction and intensity. Usually, it can only provide airflow simulation in a specific direction or range, and cannot achieve full axial airflow control. This means that researchers cannot accurately simulate the aerodynamic performance of the aircraft under different wind directions and angles, limiting the ability to fully evaluate it.

[0004] This application is expected to effectively make up for some of the shortcomings of traditional aerodynamic performance test equipment and improve the flexibility and accuracy of the test by improving the existing wind tunnel experimental device. This application can change the speed and direction of the airflow by adjusting the opening of the swingable blades, thereby achieving precise control of the airflow in the wind tunnel. This method can be used to simulate the airflow distribution scene under the operating state of the aircraft under different wind directions and speeds, which is of great significance for studying aerodynamic characteristics and other related experiments. Summary of the invention

[0005] The purpose of this application is to provide a horizontal full-axial UAV airflow detection tower to solve the problems of limited direction and poor flexibility in adjustment in existing wind tunnel experiments, so as to realize a horizontal full-axial wind tunnel experiment with controllable airflow speed direction.

[0006] To achieve the above objectives, this application provides the following solutions:

[0007] A horizontal full-axial UAV airflow detection tower comprises a shell, a combined disc bottom plate, a warehouse body, an external air duct, and a fan warehouse top; specifically:

[0008] The combined disc bottom plate comprises a disc storage platform and a fixed ring disk, wherein the disc storage platform and the fixed ring disk are both arranged in the housing; the fixed ring disk is arranged outside the disc storage platform, and the fixed ring disk is concentric with the disc storage platform; the disc storage platform is used to place the drone to be tested;

[0009] A bin body is arranged on the fixed ring disk, and includes swingable blades. A plurality of the swingable blades are arranged end to end in an axial direction along the fixed ring disk to form the bin body;

[0010] An external air duct, located outside the bin body and inside the shell;

[0011] The fan silo top is arranged at the top of the entire device and is closed with the top of the outer shell, and includes a silo top and an axial flow fan, and the axial flow fan is arranged on the silo top; a plurality of axial flow fan blades are arranged, and the axial flow fan blades are vertical to the fan silo top and are arranged in the external air duct, so as to test the airflow by generating wind.

[0012] A further improvement of the present application is that a support structure is provided on the fixed ring disk for supporting the swingable blades and preventing the swingable blades from being disturbed when swinging; the swingable blades are connected to the support structure via a connecting device.

[0013] A further improvement is that a first suspension motor is provided on the swingable blade, and the first suspension motor is used to adjust the opening amplitude of the swingable blade, and the airflow enters the warehouse body through the opened swingable blade.

[0014] In the present application, the axial flow fan is arranged in the middle of the fan silo top, and the axial flow fan blades are arranged at the top of the external air duct, and the external air duct is an annular channel surrounding the silo body.

[0015] The top of the silo is spaced a certain distance from the top of the fan silo, and the axial flow fan is not in contact with the top of the silo; the top of the silo is in a sealed state to prevent the wind generated by the axial flow fan from directly entering the interior of the silo through the top of the silo.

[0016] The structure of the present application also includes a control system, which is communicatively connected to the axial flow fan, and is connected to the support structure and the swingable blades through sensors and the first suspension motor. The sensor is installed on the support structure and is used to detect the position and posture of the swingable blades and feed back to the control system; the control system controls the first suspension motor to adjust the swing amplitude of the swingable blades.

[0017] Beneficial effects of the present application: The horizontal full-axial UAV airflow detection tower provided by the present application can realize the detection of airflow disturbances on the UAV in the full axial direction. By opening and closing the swingable blades arranged in sequence, the influence of airflows of different directions and intensities on the UAV can be simulated, so as to evaluate the stability and flight performance of the UAV, and provide a technical reference for the aerodynamic design of the UAV. At the same time, a control system is used to adjust the swing amplitude of the swingable blades. And through the feedback signal of the sensor, the control system can monitor the position and posture of the swingable blades in real time, and generate corresponding control signals to accurately control the movement of the swingable blades to simulate different airflow conditions; making the airflow simulation more flexible and accurate, and can be adjusted in real time as needed to meet the aerodynamic performance test requirements under different flight conditions.

[0018] This application also adopts the design of a combined disc bottom plate and an external air duct, so that the airflow can effectively enter the interior of the warehouse. At the same time, the setting of the axial flow fan can generate sufficient airflow to ensure that the drone is fully disturbed by the airflow, so as to conduct accurate flight performance testing. This can achieve full axial drone airflow detection, and has the advantages of precise control and efficient performance, which can play an important role in drone research and development, flight testing and performance evaluation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 Provide a schematic diagram of the overall structure of the horizontal full-axial drone airflow detection tower for this application Figure 1 ;

[0021] Figure 2 Overall schematic diagram of the horizontal full-axial UAV airflow detection tower provided for this application Figure 2 ;

[0022] Figure 3A longitudinal section of the horizontal full-axial UAV airflow detection tower provided for this application;

[0023] Figure 4 A cross-sectional view of the horizontal full-axial UAV airflow detection tower provided for this application;

[0024] Figure 5 Front view of the horizontal full-axial UAV airflow detection tower provided for this application;

[0025] Figure 6 A top view of the swingable blades in the fully closed state in the embodiment provided in the present application;

[0026] Figure 7 A schematic diagram of airflow when the swingable blades are fully opened and closed in the embodiment provided in the present application;

[0027] Figure 8 A schematic diagram of airflow when the swingable blades are partially opened or closed in the embodiment provided in the present application;

[0028] Description of the numbers in the figure:

[0029] 1. Outer shell; 2. Combined disc bottom plate; 21. Disc storage table; 22. Fixed ring disc; 3. Bin body; 31. Swingable blades; 32. Bin body top; 4. External air duct; 51. Bin roof; 52. Axial flow fan; 53. Fixed axis; 6. Air outlet. Implementation

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0031] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0032] like Figures 1 to 8 As shown, a horizontal full-axial UAV airflow detection tower includes a shell 1, a combined disc bottom plate 2, a warehouse body 3, an external air duct 4, and a fan warehouse top; specifically:

[0033] The combined disc bottom plate 2 includes a disc storage platform 21 and a fixed ring disk 22, and the disc storage platform 21 and the fixed ring disk 22 are both arranged in the housing 1; the fixed ring disk 22 is arranged outside the disc storage platform 21, and the fixed ring disk 22 is concentric with the disc storage platform 21; the disc storage platform 21 is used to place the drone to be tested;

[0034] The silo body 3 is arranged on the fixed ring disk 22, and includes swingable blades 31. A plurality of swingable blades 31 are arranged end to end in an axial direction along the fixed ring disk 22 to form the silo body 3;

[0035] The external air duct 4 is located outside the bin body 3 and inside the shell 1;

[0036] The fan silo top is arranged at the top of the entire device and is closed with the top of the outer shell 1, including a silo top 51 and an axial flow fan 52. The axial flow fan 52 is arranged on the silo top 51 through a fixed shaft 53; the axial flow fan has multiple blades for generating wind to enter the external air duct 4.

[0037] A further improvement of the present application is that a support structure is provided on the fixed ring disk 22 for carrying the swingable blades 31 and preventing the swingable blades 31 from being disturbed when swinging; the swingable blades 31 are connected to the support structure through a connecting device. In an embodiment of the present application, the connecting device can be set as a bearing or a hinge, etc. The support structure refers to a frame or bracket for supporting the swingable blades 31 and enabling them to swing. In an embodiment of the present application, the support structure is constructed of a rigid material (such as metal) to provide sufficient stability and strength to carry the swingable blades 31. The support structure is set as one or more transverse beams or pillars to connect the swingable blades 31 together and fix them on the fixed ring disk 22. A further improvement is that a first suspension motor is provided on the swingable blades 31, and the first suspension motor is used to adjust the opening amplitude of the swingable blades 31, and the airflow enters the warehouse body 3 through the opened swingable blades 31. In an optional embodiment of the present application, the first suspension motor controls the swingable blades 31 to swing around its own center as the axis. Figure 6 As shown in FIG. 1 , the airflow condition when all the swingable blades 31 are open, at this time, the drone is disturbed by the airflow in all axes; Figure 7 As shown, all the swingable blades 31 are not opened, and at this time, the drone is not disturbed by the airflow; Figure 8 As shown, the partially swingable blades 31 are opened, and the partially swingable blades 31 on the opposite sides are opened. At this time, the drone is disturbed by the relative airflow.

[0038] In the present application, the axial flow fan 52 is arranged in the middle of the fan silo top, and the axial flow fan blades are arranged at the top of the outer air duct 4, and the outer air duct 4 is an annular channel surrounding the silo body.

[0039] The top 32 of the silo is spaced a certain distance from the top of the fan silo, and the axial flow fan 52 is not in contact with the top 32 of the silo; the top 32 of the silo is in a sealed state to prevent the wind generated by the axial flow fan 52 from directly passing through the top 32 of the silo into the interior of the silo 3.

[0040] It is worth noting that an air outlet 6 is provided on the bottom of the side of the housing 1 of the device, and the air outlet 6 can be flexibly adjusted in opening and closing state, and the flow rate and direction of the external airflow can be controlled by adjusting the opening and closing state.

[0041] The structure of the present application also includes a control system, which is connected to the axial flow fan 52 in communication, and is connected to the support structure and the swingable blade 31 through a sensor and the first suspension motor. The sensor is installed on the support structure and is used to detect the position and posture of the swingable blade 31 and feed back to the control system; the control system controls the first suspension motor to adjust the swing amplitude of the swingable blade 31. The control system is electrically or electronically connected to the support structure and the swingable blade. The control system receives the feedback signal of the sensor, and after calculation and processing, generates a corresponding control signal and sends it to the first suspension motor to adjust the working state of the first suspension motor, thereby controlling the swing amplitude of the swingable blade.

[0042] In the technical solution of the present application, the number of blades of the axial flow fan can be changed according to the actual required wind force. Table 1 illustrates the change in the number of blades on the axial flow fan and the corresponding change in the wind volume.

[0043] Table 1 Relationship between the number of axial fan blades, fan diameter, speed and output air volume

[0044] Number of blades Fan diameter(m) Speed ​​(rpm) <![CDATA[Output air volume (m 3 / s)]]> 3 5 1000 500 4 6 900 550 5 7 850 600 6 8 800 650

[0045] As can be seen from Table 1, an increase in the number of blades of the axial flow fan 52 is accompanied by an increase in the diameter of the axial flow fan 52, the rotation speed will generally decrease accordingly, and the output air volume may also increase. There is a certain relationship between the number of blades of the axial flow fan, the diameter of the axial flow fan 52 and the rotation speed, which can usually be described by the following formula:

[0046] Fan output air volume formula: Q = A * V (1)

[0047] Among them, Q is the air volume output by the fan (m³ / s), A is the effective area of ​​the fan impeller inlet (m²), and V is the wind speed (m / s).

[0048] The relationship between the number of fan blades and air volume is: N = K * Q (2)

[0049] Among them, N is the number of fan blades, and K is the proportionality coefficient, which can be obtained according to Table 1.

[0050] The relationship between fan diameter and number of blades:

[0051] (3)

[0052] Where D is the fan diameter (m), A is the effective area of ​​the fan impeller inlet (m²), and N is the number of fan blades.

[0053] The relationship between fan speed and number of blades:

[0054] RPM = (V * 60) / (π * D) (4)

[0055] Where RPM is the fan speed (revolutions per minute), V is the wind speed (m / s), and D is the fan diameter (m).

[0056] According to the relationship between the number of blades of the axial flow fan, the diameter and rotation speed of the axial flow fan 52 and the output air volume, the corresponding axial flow fan 52 can be set according to actual needs, so as to further improve the purpose of controllable air volume in the entire tower.

[0057] It is worth noting that the horizontal full-axial UAV airflow detection tower provided in this application is mainly used to test the impact of airflow on the UAV under different flight conditions, so as to better understand the stability and safety performance of the UAV. In practical applications, the tower can control the flow and direction of the airflow by adjusting the opening amplitude of the swingable blades. At the same time, the axial flow fan can also be adjusted as needed to ensure that the output air volume can meet the experimental requirements. The design of the entire tower is very flexible and can be adjusted and optimized according to actual application requirements to adapt to different experimental environments and conditions.

[0058] In the description of the present application, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0059] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood through specific circumstances.

[0060] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0061] The embodiments described above are only descriptions of the preferred methods of the present application, and are not intended to limit the scope of the present application. Without departing from the design spirit of the present application, various modifications and improvements made to the technical solutions of the present application by ordinary technicians in this field should fall within the protection scope determined by the claims of the present application.

Claims

1. Horizontal full-axial UAV airflow detection tower, characterized by: include: shell, The combined disc bottom plate includes a disc storage platform and a fixed ring disc, and the disc storage platform and the fixed ring disc are both arranged in the housing; The fixed ring disk is arranged outside the circular disk storage platform, and the fixed ring disk is concentric with the circular disk storage platform; the circular disk storage platform is used to place the UAV to be tested; A bin body is arranged on the fixed ring disk, and includes swingable blades. A plurality of the swingable blades are arranged end to end in an axial direction along the fixed ring disk to form the bin body; An external air duct, located outside the bin body and inside the shell; The fan silo top is arranged at the top of the entire device and is closed with the top of the outer shell, and includes a silo top and an axial flow fan, and the axial flow fan is arranged on the silo top; a plurality of axial flow fan blades are arranged, and the axial flow fan blades are vertical to the fan silo top and are arranged in the external air duct, so as to test the airflow by generating wind.

2. The horizontal full-axial UAV airflow detection tower according to claim 1 is characterized in that: The fixed ring disk is provided with a supporting structure for carrying the swingable blades and preventing the swingable blades from being disturbed when swinging; the swingable blades are connected to the supporting structure via a connecting device.

3. The horizontal full-axial UAV airflow detection tower according to claim 2 is characterized in that: The swingable blade is provided with a first suspension motor, and the first suspension motor is used to adjust the opening amplitude of the swingable blade, and the airflow enters the warehouse body through the opened swingable blade.

4. The horizontal full-axial UAV airflow detection tower according to claim 1 is characterized in that: The axial flow fan is arranged in the middle of the fan silo top, and the axial flow fan blades are arranged on the top of the outer air duct, and the outer air duct is an annular channel surrounding the silo body.

5. The horizontal full-axial UAV airflow detection tower according to claim 4 is characterized in that: The top of the silo is spaced a certain distance from the top of the fan silo, and the axial flow fan is not in contact with the top of the silo; the top of the silo is in a sealed state to prevent the wind generated by the axial flow fan from directly entering the interior of the silo through the top of the silo.

6. The horizontal full-axial UAV airflow detection tower according to claim 3 is characterized in that: Also included is a control system, the control system is in communication connection with the axial flow fan, and is connected with the support structure and the swingable blades through a sensor and the first suspension motor, the sensor is mounted on the support structure, and is used to detect the position and posture of the swingable blades, and feed back to the control system; The control system controls the first suspension motor to adjust the swing amplitude of the swingable blade.

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