An air rudder surface angle measuring device

Abstract

The application provides an air rudder surface rotation angle measuring device, which comprises an air rudder support, an air rudder shaft and a rudder shaft cover plate. The air rudder shaft is rotationally connected to the air rudder support and can rotate around its own axis. The rudder shaft cover plate is fixed to one end of the air rudder shaft along the axial direction and is fixed to the air rudder support. An adapter shaft is fixed to one end of the air rudder shaft along the axial direction. A rotary transformer is used to detect the rotation angle of the air rudder shaft. The rotary transformer comprises a rotary transformer rotor and a rotary transformer stator in clearance fit. The rotary transformer rotor is fixed to the adapter shaft, and the rotary transformer stator is fixed to the rudder shaft cover plate. The rotation angle of the air rudder shaft is calculated according to the voltage change generated by the mutual rotation between the rotary transformer stator and the rotary transformer rotor. The device has simple structure, is convenient to install and operate, and has no measurement noise.

Description

Technical Field

[0001] This application relates to the field of aircraft technology, and more specifically, to an air control surface angle measuring device. Background Technology

[0002] Air control surfaces are a typical load on aircraft actuators, and measuring their rotation angle is essential for testing actuator performance. Air control surface rotation angle measurement devices are generally divided into two types: photoelectric encoder type and resistive type. The photoelectric encoder type has drawbacks such as complex structure, high cost, and high coaxiality requirements, while the resistive type suffers from measurement noise, which can affect the measurement results. Summary of the Invention

[0003] This application provides an air control surface angle measuring device to solve the problems of complex structure and measurement noise in existing angle measuring devices.

[0004] To achieve the above objectives, this application provides the following technical solution:

[0005] An air control surface angle measuring device includes:

[0006] An air rudder support, an air rudder shaft, and a rudder shaft cover plate are provided. The air rudder shaft is rotatably connected to the air rudder support and is capable of rotating about its own axis. The rudder shaft cover plate is axially fixed to one end of the air rudder shaft and fixed to the air rudder support.

[0007] An adapter shaft is axially fixed to one end of the air rudder shaft;

[0008] A rotary transformer is used to detect the rotation angle of the air rudder shaft; the rotary transformer includes a rotary transformer rotor and a rotary transformer stator with clearance fit, the rotary transformer rotor is fixed to the adapter shaft, and the rotary transformer stator is fixed to the rudder shaft cover plate.

[0009] Optionally, the adapter shaft extends axially away from the side of the air rudder shaft; the rotary transformer rotor is mounted on the adapter shaft;

[0010] It also includes a locking nut, which is located on the adapter shaft and is used to fix the rotary transformer rotor and the adapter shaft.

[0011] Optionally, the adapter shaft includes:

[0012] The main body has external threads at both axial ends; the air rudder shaft has a mounting hole at its shaft end, and an internal thread is provided in the mounting hole, with the shaft end of the main body threaded into the mounting hole;

[0013] A radial limiting part is fitted onto the shaft end of the main body and extends radially along the main body. The rotary transformer rotor is pressed axially against the radial limiting part by the locking nut.

[0014] Optionally, there are two rotary transformer stators, which are symmetrically arranged along the axis of the air rudder shaft;

[0015] The stator of the rotary transformer has an arc-shaped structure.

[0016] Optionally, a bearing is provided between the air rudder shaft and the air rudder support, the outer ring of the bearing is fixed to the air rudder support, and the inner ring of the bearing is fixed to the air rudder shaft.

[0017] Optionally, it also includes:

[0018] A mounting bushing is provided, the diameter of which is larger than the outer diameter of the adapter shaft, and the bushing is fitted onto the outside of the adapter shaft.

[0019] Optionally, it also includes:

[0020] A control device, connected to the rotary transformer, is used to receive the measured angle sent by the rotary transformer.

[0021] Optionally, it also includes:

[0022] A host computer is connected to the control device, and the host computer is used to receive the measurement angle sent by the control device and perform data processing.

[0023] Optionally, the control device includes:

[0024] An angle information acquisition module, connected to the rotary transformer, is used to acquire the rotation angle information of the air rudder shaft;

[0025] A DSP chip, connected to the angle information acquisition module, is used to convert the rotation angle information into a digital signal;

[0026] A wireless communication module, connected to the DSP chip, is used to send digital signals to the host computer.

[0027] Optionally, the wireless communication module is a Bluetooth module or a ZigBee module.

[0028] The air rudder angle measuring device provided in this application includes an air rudder support, an air rudder shaft, and a rudder shaft cover. The air rudder shaft is rotatably connected to the air rudder support and can rotate around its own axis. The rudder shaft cover is axially fixed to one end of the air rudder shaft and fixed to the air rudder support. An adapter shaft is axially fixed to one end of the air rudder shaft. A rotary transformer is used to detect the rotation angle of the air rudder shaft. The rotary transformer includes a rotary transformer rotor and a rotary transformer stator with clearance fit. The rotary transformer rotor is fixed to the adapter shaft, and the rotary transformer stator is fixed to the rudder shaft cover.

[0029] The air control surface angle measuring device provided in this application embodiment has the following technical advantages compared to the prior art:

[0030] An adapter shaft is installed at the end of the air rudder shaft, and a rotary transformer is installed on the adapter shaft to detect the rotation angle of the air rudder shaft. The rotor of the rotary transformer is fixed to the adapter shaft, and the stator of the rotary transformer is fixed to the rudder shaft cover plate. The rotation angle of the air rudder shaft is calculated by the voltage change generated by the mutual rotation between the stator and the rotor of the rotary transformer. Its structure is simple and easy to install and operate; at the same time, there is no measurement noise. Attached Figure Description

[0031] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0032] Figure 1 A cross-sectional structural schematic diagram of an air control surface angle measuring device provided in an embodiment of this application;

[0033] Figure 2 This is a side view of an air control surface angle measuring device provided in an embodiment of this application.

[0034] The following labels are shown in the attached diagram:

[0035] 1. Air rudder shaft; 2. Air rudder bracket; 3. Bearing; 4. Rudder shaft cover; 5. Rotary transformer rotor; 6. Rotary transformer stator; 7. Locking nut; 8. Adapter shaft. Detailed Implementation

[0036] This invention discloses an air control surface angle measuring device to solve the problems of complex structure and measurement noise in existing angle measuring devices.

[0037] To make the technical solutions and advantages of the embodiments of this application clearer, the exemplary embodiments of this application will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not an exhaustive list of all embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0038] Please see Figure 1-2 , Figure 1 A cross-sectional structural schematic diagram of an air control surface angle measuring device provided in an embodiment of this application; Figure 2 This is a side view of an air control surface angle measuring device provided in an embodiment of this application.

[0039] In one specific embodiment, this application provides an air rudder surface angle measuring device, including an air rudder support 2, an air rudder shaft 1, a rudder shaft cover 4, an adapter shaft 8, and a rotary transformer. The air rudder support 2, air rudder shaft 1, and rudder shaft cover 4 are inherent structures of the air rudder system itself and can be configured according to existing technology. It is understood that the air rudder shaft 1 is rotatably connected to the air rudder support 2, allowing it to rotate around its own axis. Specifically, a bearing 3 is provided between the air rudder shaft 1 and the air rudder support 2, with the outer ring of the bearing 3 fixed to the air rudder support 2 and the inner ring of the bearing 3 fixed to the air rudder shaft 1. The rudder shaft cover 4 is axially fixed to one end of the air rudder shaft 1 for fixing the air rudder shaft 1. The rudder shaft cover 4 is fixed to the air rudder support 2, generally in a detachable fixed connection. The adapter shaft 8 is axially disposed at one end of the air rudder shaft 1, preferably near the end of the rudder shaft cover plate 4. The rudder shaft cover plate 4 has a clearance hole in the middle to allow space for the adapter shaft 8. The adapter shaft 8 is preferably coaxially disposed with the air rudder shaft 1. The rotary transformer includes a rotary transformer rotor 5 and a rotary transformer stator 6, which are clearance-fitted. The rotary transformer rotor 5 is fixed to the adapter shaft 8, and the rotary transformer stator 6 is fixed to the rudder shaft cover plate 4. When the air rudder shaft 1 rotates, it drives the rotary transformer rotor 5, which is fixedly connected to it, to rotate. The rotary transformer rotor 5 rotates relative to the rotary transformer stator 6, and the rotation angle is calculated based on the voltage change between the two.

[0040] The air control surface angle measuring device provided in this application embodiment has the following technical advantages compared to the prior art:

[0041] An adapter shaft 8 is installed at the end of the air rudder shaft 1, and a rotary transformer is installed on the adapter shaft 8 to detect the rotation angle of the air rudder shaft 1. The rotary transformer rotor 5 is fixed to the adapter shaft 8, and the rotary transformer stator 6 is fixed to the rudder shaft cover plate 4. The rotation angle of the air rudder shaft 1 is calculated by the voltage change generated by the mutual rotation between the rotary transformer stator 6 and the rotary transformer rotor 5. Its structure is simple and easy to install and operate; at the same time, there is no measurement noise.

[0042] Specifically, the adapter shaft 8 extends axially away from the side of the air rudder shaft 1; the rotary transformer rotor 5 is mounted on the adapter shaft 8 and secured by a locking nut 7; the locking nut 7 is located on the adapter shaft 8 and is used to fix the rotary transformer rotor 5 and the adapter shaft 8. This arrangement facilitates assembly and disassembly.

[0043] The adapter shaft 8 includes a main body and a radial limiting part. Both axial ends of the main body are provided with external threads. One end of the main body is fixed to the air rudder shaft 1, and the other end is connected to the locking nut 7. In one embodiment, the air rudder shaft 1 has a mounting hole with an internal thread. The main body's shaft end is threaded into the mounting hole for fixation, thereby simplifying the device structure and improving assembly / disassembly efficiency. The radial limiting part is fitted onto the shaft end of the main body, preferably near the air rudder shaft 1. The radial limiting part extends radially along the main body, and the rotary transformer rotor 5 is pressed axially against the radial limiting part by the locking nut 7. The locking nut 7 is fitted onto the shaft end of the adapter shaft 8 and, through its external thread engagement with the adapter shaft 8, presses the rotary transformer rotor 5 towards the radial limiting part. This achieves the fixation of the rotary transformer rotor 5 on the adapter shaft 8.

[0044] Furthermore, two rotary transformers are positioned, with the two rotary transformer stators 6 symmetrically arranged along the axis of the air rudder shaft 1. The rotary transformer stators 6 have an arc-shaped structure and can be fixed to the rudder shaft cover plate 4 by threaded fasteners, specifically by bolts. Each rotary transformer stator 6 is equipped with two bolts, which pass through the longitudinal direction of the rotary transformer and are fixed to the rudder shaft cover plate 4. The above device has a simple structure and is easy to install.

[0045] Based on the above embodiments, the measuring device further includes a mounting bushing. The diameter of the mounting bushing is larger than the outer diameter of the adapter shaft 8. The bushing can be fitted onto the outside of the adapter shaft 8. Before installing the rotary transformer rotor 5, in order to ensure a reasonable clearance between the outer cylindrical surface of the rotary transformer rotor 5 and the inner cylindrical hole surface of the rotary transformer stator 6, the rudder shaft cover plate 4, on which the rotary transformer stator 6 is mounted, is not fully tightened to the rudder shaft bracket. Instead, the bushing structure is installed on the adapter shaft 8. The bushing is a cylinder slightly larger than the outer cylindrical diameter of the rotary transformer rotor 5, ensuring a clearance fit with the inner cylindrical hole surface of the rotary transformer stator 6. After the bushing is installed in place, the rudder shaft cover plate 4 is fully tightened to the rudder shaft bracket, and then the bushing structure is removed. At this time, installing the rotary transformer rotor 5 can ensure a reasonable movement clearance between it and the rotary transformer stator 6, ensuring that the rotary transformer rotor 5 will not rub against the rotary transformer stator 6 when rotating.

[0046] Based on the above embodiments, the measuring device further includes a control device connected to the rotary transformer for receiving the measurement angle sent by the rotary transformer. In another embodiment, a host computer is also included, connected to the control device, for receiving the measurement angle sent by the control device and performing data processing for data storage. The control device includes an angle information acquisition module, a DSP chip, and a wireless communication module. The angle information acquisition module is connected to the rotary transformer for acquiring the rotation angle information of the air rudder shaft 1. The DSP chip is connected to the angle information acquisition module for converting the rotation angle information into a digital signal. The wireless communication module is connected to the DSP chip for sending the digital signal to the host computer. The wireless communication module is a Bluetooth module or a ZigBee module. After the rotary transformer obtains the rotation angle information, the information is converted into a digital signal by the rotary transformer decoding chip, and the measurement information is input into the test system through the DSP and bus chip to realize the measurement of the air rudder surface rotation angle.

[0047] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0048] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. An air control surface angle measuring device, characterized in that, include: An air rudder support, an air rudder shaft, and a rudder shaft cover plate are provided. The air rudder shaft is rotatably connected to the air rudder support and is capable of rotating about its own axis. The rudder shaft cover plate is axially fixed to one end of the air rudder shaft and fixed to the air rudder support. An adapter shaft is fixed axially to one end of the air rudder shaft. A clearance hole is provided in the middle of the rudder shaft cover to allow space for the installation of the adapter shaft. A rotary transformer is used to detect the rotation angle of the air rudder shaft; the rotary transformer includes a rotary transformer rotor and a rotary transformer stator with clearance fit, the rotary transformer rotor is fixed to the adapter shaft, and the rotary transformer stator is fixed to the rudder shaft cover plate; The adapter shaft extends axially away from the air rudder shaft; the rotary transformer rotor is mounted on the adapter shaft; It also includes a locking nut, which is located on the adapter shaft and is used to fix the rotary transformer rotor and the adapter shaft; The adapter shaft includes: The main body has external threads at both axial ends; the air rudder shaft has a mounting hole at its shaft end, and an internal thread is provided in the mounting hole, with the shaft end of the main body threaded into the mounting hole; A radial limiting part is fitted onto the shaft end of the main body and extends radially along the main body. The rotary transformer rotor is pressed axially against the radial limiting part by the locking nut. The mounting bushing has a diameter larger than the outer diameter of the adapter shaft, and the mounting bushing can be fitted onto the outside of the adapter shaft. Before installing the rotary transformer rotor, the rudder shaft cover plate and rudder shaft bracket on which the rotary transformer stator is installed are not fully tightened. The mounting bushing is installed on the adapter shaft. The mounting bushing is a cylinder with a diameter slightly larger than the outer cylinder of the rotary transformer rotor. After the mounting bushing is installed in place, the rudder shaft cover plate is fully tightened to the rudder shaft bracket, and then the mounting bushing is removed.

2. The air control surface angle measuring device according to claim 1, characterized in that, There are two rotary transformer stators, which are symmetrically arranged along the axis of the air rudder shaft. The stator of the rotary transformer has an arc-shaped structure.

3. The air control surface angle measuring device according to claim 2, characterized in that, A bearing is provided between the air rudder shaft and the air rudder support. The outer ring of the bearing is fixed to the air rudder support, and the inner ring of the bearing is fixed to the air rudder shaft.

4. The air control surface angle measuring device according to any one of claims 1-3, characterized in that, Also includes: A control device, connected to the rotary transformer, is used to receive the measured angle sent by the rotary transformer.

5. The air control surface angle measuring device according to claim 4, characterized in that, Also includes: A host computer is connected to the control device, and the host computer is used to receive the measurement angle sent by the control device and perform data processing.

6. The air control surface angle measuring device according to claim 5, characterized in that, The control device includes: An angle information acquisition module, connected to the rotary transformer, is used to acquire the rotation angle information of the air rudder shaft; A DSP chip, connected to the angle information acquisition module, is used to convert the rotation angle information into a digital signal; A wireless communication module, connected to the DSP chip, is used to send digital signals to the host computer.

7. The air control surface angle measuring device according to claim 6, characterized in that, The wireless communication module is a Bluetooth module or a ZigBee module.

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