Device for measuring dynamic characteristics of weather vane

Abstract

The invention provides a weather vane dynamic characteristic measuring device, and belongs to the technical field of weather vane dynamic characteristic tests, and the device specifically comprises an installation support which is used for installing a tested piece in a test wind tunnel; the driving piece is mounted in the test wind tunnel; a pressing rod is arranged at the output end of the driving piece, one end of the pressing rod is an abutting end, the abutting end is used for abutting against the weather vane of the tested piece so that the weather vane can be stabilized at a preset angle, the driving piece drives the pressing rod to rotate and enables the pressing rod to be stabilized in a first state or a second state, and the abutting end of the pressing rod in the first state abuts against the weather vane of the tested piece; the pressing rod in the second state is located outside the rotating range of the wind vane; the measurement and control equipment is electrically connected with the driving part, the measurement and control equipment is electrically connected with the tested piece, the measurement and control equipment is used for controlling starting and stopping of the driving part, and the measurement and control equipment is used for collecting dynamic angle data of the weather vane in real time. According to the processing scheme, the dynamic performance of the weather vane can be rapidly measured.

Description

Technical Field

[0001] The present application relates to the field of wind vane dynamic characteristic test, and in particular to a wind vane dynamic characteristic measuring device. Background Art

[0002] Wind vane probes are generally developed in accordance with industry standards. The dynamic performance test of the angle of attack / sideslip angle wind vane generally refers to the requirements of standards such as HB7273-1996 "General Specifications for Angle of Attack and Sideslip Angle Sensors". These standards have clear technical index requirements. The dynamic performance test generally includes overshoot and damping coefficient tests. There are only test theories and simple methods, but no specific test devices. The characteristic tests are limited to large damping conditions, and there are no clear requirements for small damping conditions. Summary of the invention

[0003] In view of this, the present application provides a device for measuring the dynamic characteristics of a wind vane, which solves the problems in the prior art and quickly measures the dynamic performance of the wind vane.

[0004] The present application provides a device for measuring the dynamic characteristics of a wind vane, which adopts the following technical solution:

[0005] A device for measuring dynamic characteristics of a weather vane, comprising:

[0006] Mounting bracket, used to mount the test piece in the test wind tunnel;

[0007] The driving parts are installed in the test wind tunnel;

[0008] A pressure rod is provided on the output end of the driving member, one end of the pressure rod is a pressing end, and the pressing end is used to abut against the weather vane of the test piece to stabilize the weather vane at a preset angle. The driving member drives the pressure rod to rotate and stabilizes the pressure rod in a first state or a second state. In the first state, the pressing end of the pressure rod abuts against the weather vane of the test piece, and in the second state, the pressure rod is located outside the rotation range of the weather vane.

[0009] The measuring and controlling device is electrically connected to the driving member, the measuring and controlling device is electrically connected to the test piece, the measuring and controlling device is used to control the start and stop of the driving member, and the measuring and controlling device is used to collect the dynamic angle data of the wind vane at all times.

[0010] Optionally, the driving member includes a motor and a reducer, and the motor and the reducer are fixed in the test wind tunnel. The output shaft of the motor is connected to the input shaft of the reducer, and the output shaft of the reducer serves as the output end of the driving member.

[0011] Optionally, the pressure rod in the first state is parallel to the vertical direction, the test piece is located below the pressure rod, and the pressure rod in the first state and the pressure rod in the second state are perpendicular to each other.

[0012] Optionally, when the driving member drives the pressure rod to rotate, the rotation axis of the pressure rod is parallel to the rotation axis of the weather vane of the test piece.

[0013] Optionally, a sleeve is installed on the output shaft of the reducer, and the length direction of the sleeve is perpendicular to the output shaft of the reducer. A telescopic rod is provided in the sleeve, and the telescopic rod slides along the length direction of the sleeve. A through hole is provided on the output shaft of the reducer for the pressure rod to pass through, and the end of the pressure rod away from the pressing end passes through the through hole and is connected to the telescopic rod. A fixing screw is provided on the sleeve and passes through the side wall of the sleeve, and the fixing screw is used to tighten the telescopic rod.

[0014] Optionally, the output shaft of the reducer is perpendicular to the input shaft of the reducer.

[0015] In summary, this application includes the following beneficial technical effects:

[0016] The flow field environment provided by the test wind tunnel is used to simulate the air vibration environment of the wind vane; the pressure rod is placed at a preset release angle through the driving member and the pressure rod, and the driving member is controlled by the measurement and control equipment to drive the pressure rod to rotate to release the wind vane. The wind vane of the test piece returns to the equilibrium position under the action of the airflow, and the wind of the test piece oscillates freely in the wind tunnel flow field. The measurement and control equipment collects the dynamic angle data of the wind vane in real time, obtains the overshoot waveform of the wind vane in the smooth flow, and thus calculates and processes the dynamic characteristic data of the wind vane, such as oscillation frequency, damping ratio, oscillation time and other parameters, which reflect the dynamic characteristics of the current wind vane under test. The angle step change curve of the wind vane is tested and recorded, which can be repeatedly verified in forward and reverse directions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, 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 work.

[0018] Figure 1 This is a principle block diagram of the device for measuring the dynamic characteristics of a wind vane in this application;

[0019] Figure 2 This is a schematic diagram of the structure of the driving member, pressure rod and test piece of this application.

[0020] Figure 3 This is a top view of the figure.

[0021] Explanation of the reference numerals: 1. measurement and control equipment; 2. driving part; 21. motor; 22. reducer; 23. pressure rod; 24. sleeve; 25. telescopic rod; 26. bump; 3. test piece; 4. test wind tunnel. DETAILED DESCRIPTION

[0022] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0023] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0024] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0025] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The illustrations only show the components related to the present application rather than being drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0026] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects described may be practiced without these specific details.

[0027] An embodiment of the present application provides a device for measuring the dynamic characteristics of a weather vane.

[0028] like Figure 1 , Figure 2 and Figure 3As shown, a device for measuring the dynamic characteristics of a weather vane comprises: a mounting bracket for mounting a test piece 3 in a test wind tunnel 4; a driving member 2 mounted in the test wind tunnel 4; a pressure rod 23 is provided on the output end of the driving member 2, one end of the pressure rod 23 is a pressing end, and the pressing end is used to abut against the weather vane of the test piece 3 so that the weather vane is stabilized at a preset angle, the driving member 2 drives the pressure rod 23 to rotate and stabilizes the pressure rod 23 in a first state or a second state, the pressing end of the pressure rod 23 in the first state abuts against the weather vane of the test piece 3, and the pressure rod 23 in the second state is outside the rotation range of the weather vane.

[0029] The measuring and controlling device 1 is electrically connected to the driving member 2, and the measuring and controlling device 1 is electrically connected to the test piece 3. The measuring and controlling device 1 is used to control the start and stop of the driving member 2, and the measuring and controlling device 1 is used to collect the dynamic angle data of the wind vane at all times.

[0030] The flow field environment provided by the test wind tunnel 4 is used to simulate the air vibration environment of the wind vane; the driving member 2 and the pressure rod 23 are used to make the pressure rod 23 at a preset release angle, and the measurement and control equipment 1 controls the driving member 2 to drive the pressure rod 23 to rotate to realize the release of the wind vane. The wind vane of the test piece 3 returns to the equilibrium position under the action of the airflow, and the wind of the test piece 3 oscillates freely in the wind tunnel flow field. The measurement and control equipment 1 collects the dynamic angle data of the wind vane in real time, obtains the overshoot waveform of the wind vane in the smooth flow, and thereby calculates and processes the dynamic characteristic data of the wind vane, such as oscillation frequency, damping ratio, oscillation time and other parameters, which reflect the dynamic characteristics of the current wind vane being tested. The angle step change curve of the wind vane is tested and recorded, which can be repeatedly verified in forward and reverse directions.

[0031] In one embodiment, the air flow velocity is adjusted to 60 m / s and the wind vane is released at a deflection of 5°.

[0032] The driving member 2 includes a motor 21 and a reducer 22 , which are fixed in the test wind tunnel 4 , and the output shaft of the motor 21 is connected to the input shaft of the reducer 22 , and the output shaft of the reducer 22 serves as the output end of the driving member 2 .

[0033] The pressure rod 23 in the first state is parallel to the vertical direction, the test piece 3 is located below the pressure rod 23, the pressure rod 23 in the first state and the pressure rod 23 in the second state are perpendicular to each other, and the distance between the rotation axis of the pressure rod 23 and the rotation axis of the weather vane is greater than the rotation radius of the weather vane. When the driving member 2 drives the pressure rod 23 to rotate, the rotation axis of the pressure rod 23 is parallel to the rotation axis of the weather vane of the test piece 3.

[0034] The pressing end of the pressure rod 23 presses on the upper surface of the weather vane to limit the rotation of the weather vane. After the pressure rod 23 is driven to rotate 90°, the pressure rod 23 is located outside the rotation range of the weather vane, so that the weather vane can rotate freely, thereby releasing the weather vane.

[0035] A sleeve 24 is installed on the output shaft of the reducer 22, and the length direction of the sleeve 24 is perpendicular to the output shaft of the reducer 22. A telescopic rod 25 is arranged in the sleeve 24, and the telescopic rod 25 slides along the length direction of the sleeve 24. A through hole is arranged on the output shaft of the reducer 22 for the pressure rod 23 to pass through, and the end of the pressure rod 23 away from the pressing end passes through the through hole and is connected to the telescopic rod 25. A fixing screw passing through the side wall of the sleeve 24 is arranged on the sleeve 24, and the fixing screw is used to tighten the telescopic rod 25. A convex block 26 is arranged at one end of the telescopic rod 25 away from the pressure rod 23, and the convex block 26 is convenient for people to hold and adjust the telescopic rod 25.

[0036] Slide the telescopic rod 25 to drive the pressure rod 23 to move up and down, adjust the height of the pressing end of the pressure rod 23, and tighten the fixing screw to fix the telescopic rod 25 after adjustment; the angle of the weather vane when it is released can be changed by the height of the pressing end of the pressure rod 23, and it can also adapt to different types of test pieces 3.

[0037] Generally, the rotating surface of the wind vane is perpendicular to the flow direction of the wind tunnel airflow, so the output of the driving member 2 is perpendicular to the flow direction of the wind tunnel airflow, and the output shaft of the reducer 22 described in the present application is perpendicular to the input shaft of the reducer 22. The motor 21 is generally long in the length direction of the output shaft. In the embodiment of the present application, the output of the reducer motor 21 is commutated, so that the length direction of the motor 21 is parallel to the flow direction of the wind tunnel airflow, thereby reducing the influence of the motor 21 on the wind tunnel flow field.

[0038] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A device for measuring the dynamic characteristics of a weather vane, characterized in that: include: A mounting bracket, used for mounting the test piece (3) in the test wind tunnel (4); A driving member (2) is installed in a test wind tunnel (4); A pressure rod (23) is provided on the output end of the driving member (2), one end of the pressure rod (23) being a pressing end, the pressing end being used to abut against the weather vane of the test member (3) so as to stabilize the weather vane at a preset angle, the driving member (2) driving the pressure rod (23) to rotate and stabilize the pressure rod (23) in a first state or a second state, the pressing end of the pressure rod (23) in the first state abuts against the weather vane of the test member (3), and the pressure rod (23) in the second state is located outside the rotation range of the weather vane; A measurement and control device (1), wherein the measurement and control device (1) is electrically connected to the driving member (2), the measurement and control device (1) is electrically connected to the test member (3), the measurement and control device (1) is used to control the start and stop of the driving member (2), and the measurement and control device (1) is used to collect dynamic angle data of the wind vane at all times.

2. The device for measuring the dynamic characteristics of a wind vane according to claim 1, characterized in that: The driving member (2) comprises a motor (21) and a reducer (22); the motor (21) and the reducer (22) are fixed in a test wind tunnel (4); an output shaft of the motor (21) is connected to an input shaft of the reducer (22); and the output shaft of the reducer (22) serves as an output end of the driving member (2).

3. The device for measuring the dynamic characteristics of a wind vane according to claim 2, characterized in that: The pressure rod (23) in the first state is parallel to the vertical direction, the test piece (3) is located below the pressure rod (23), and the pressure rod (23) in the first state and the pressure rod (23) in the second state are perpendicular to each other.

4. The device for measuring the dynamic characteristics of a wind vane according to claim 3, characterized in that: When the driving member (2) drives the pressure rod (23) to rotate, the rotation axis of the pressure rod (23) is parallel to the rotation axis of the weather vane of the test piece (3).

5. The device for measuring the dynamic characteristics of a wind vane according to claim 4, characterized in that: A sleeve (24) is installed on the output shaft of the reducer (22), and the length direction of the sleeve (24) is perpendicular to the output shaft of the reducer (22). A telescopic rod (25) is arranged in the sleeve (24), and the telescopic rod (25) slides along the length direction of the sleeve (24). A through hole for the pressure rod (23) to pass through is arranged on the output shaft of the reducer (22), and the end of the pressure rod (23) away from the pressing end passes through the through hole and is connected to the telescopic rod (25). A fixing screw passing through the side wall of the sleeve (24) is arranged on the sleeve (24), and the fixing screw is used to tighten the telescopic rod (25).

6. The device for measuring the dynamic characteristics of a wind vane according to claim 5, characterized in that: The output shaft of the reducer (22) is perpendicular to the input shaft of the reducer (22).

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