A steering angle measuring device

Abstract

This application discloses a steering angle measuring device, relating to the field of aircraft. A tire fixing device is used to fix the steering tire of an aircraft; a rotating part is rotatably mounted on a fixed base and fixedly connected to the side of the tire fixing device away from the steering tire; at least two cursor transmitters are disposed opposite each other on the outer wall of the fixed base and can rotate longitudinally along the fixed base. The cursor transmitters are used to emit light beams and point the emitted light beams to a specific position on the aircraft; an angle measuring device is used to measure the rotation angle of the rotating part. The steering angle measuring device of this application aligns the fixed base with the aircraft axis through the cursor transmitters and directly measures the rotation angle of the rotating part using the angle measuring device, thus overcoming the limitations of traditional manual measurement methods, improving the accuracy and efficiency of steering angle measurement, and reducing the workload of personnel.

Description

Technical Field

[0001] This application relates to the field of aircraft technology, and in particular to a steering angle measuring device. Background Technology

[0002] With the large-scale application of aircraft in logistics transportation, aerial surveying, emergency rescue and other fields, the attitude control and navigation accuracy of aircraft are directly related to mission execution efficiency and flight safety. During the takeoff and landing phases of fixed-wing aircraft, precise steering angle control is a core technical requirement for avoiding runway deviation, dealing with crosswind interference, and achieving safe landing.

[0003] However, current methods for measuring aircraft turning angles remain relatively traditional, primarily relying on manual measurement using measuring tools. This method is not only time-consuming and labor-intensive, increasing the workload of personnel, but its accuracy and efficiency are also limited by the skills and experience of the operators. Utility Model Content

[0004] This application provides a steering angle measuring device, which solves the technical problem that existing aircraft steering angle measurements mainly rely on manual operation with the aid of measuring tools, resulting in a cumbersome process that consumes a lot of time and manpower.

[0005] This application provides a steering angle measuring device, including: a tire fixing device for fixing the steering tire of an aircraft; a rotating part rotatably mounted on a fixed base and fixedly connected to the side of the tire fixing device away from the steering tire; at least two cursor emitting devices, disposed opposite to each other on the outer wall of the fixed base and rotatable along the longitudinal direction of the fixed base, the cursor emitting devices emitting light beams and pointing the emitted light beams to a specific position of the aircraft; by pointing the light beams emitted by the cursor emitting devices to the specific position, the preset position of the fixed base is aligned with the axis of the aircraft;

[0006] An angle measuring device is used to measure the rotation angle of the rotating part.

[0007] In one possible implementation, the angle measuring device includes a sensor; the sensor is fixedly mounted on the fixed base, and the rotating shaft of the sensor is fixedly connected to the rotating part, such that when the rotating part rotates, it drives the rotating shaft of the sensor to rotate synchronously.

[0008] In one possible implementation, the angle measuring device includes a scale line disposed on the fixed base; the two cursor transmitters are respectively aligned with the reference point of the scale line.

[0009] In one possible implementation, the tire fixing device includes a limiting groove and fastening components; the limiting groove is installed on the top of the rotating part; the fastening components are respectively disposed on both sides of the limiting groove and can slide along the limiting groove within a certain range.

[0010] In one possible implementation, the fastening assembly includes at least two transverse stops, at least two vertical rods, at least four diagonal braces, and at least two first fasteners; the limiting groove includes at least two longitudinal stops, which are spaced apart at the top of the rotating part, and each longitudinal stop has a sliding groove on both sides along its length; the two ends of the at least two transverse stops are slidably connected to the corresponding sliding grooves, and each transverse stop has a first mounting hole at its end; at least two vertical rods are fixedly connected to the middle of the corresponding longitudinal stops and have a moving groove along their length; wherein two diagonal braces are disposed on the transverse stops. On the same side of the rod, two additional diagonal braces are disposed on the other side of the transverse stop. The two diagonal braces located on the same side of the transverse stop have one end hinged to each other, and the hinge point is slidably connected to the moving groove of the corresponding vertical rod. The other end is respectively hinged to the end of the corresponding transverse stop. The diagonal braces are used to drive the two transverse stops to move synchronously towards or away from each other to clamp or release the steering tire of the aircraft. At least two first fasteners are configured such that when the two transverse stops move to the position of clamping the steering tire of the aircraft, one end of the fastener passes through the corresponding sliding groove and is connected to the corresponding first mounting hole to lock the longitudinal stop and the transverse stop.

[0011] In one possible implementation, the contact surface between the lateral stop and the steering tire is an inclined plane.

[0012] In one possible implementation, the cross-section of the end of the sensor's rotating shaft facing the rotating part is a non-circular cross-section; a fourth mounting hole corresponding to the non-circular cross-section is provided in the middle of the rotating part.

[0013] In one possible implementation, the steering angle measuring device further includes a tilt adjustment assembly; the tilt adjustment assembly includes:

[0014] At least two fixed-height support legs are located at the bottom of the fixed base;

[0015] At least one height-adjustable support leg is provided at the bottom of the fixed base;

[0016] Specifically, by adjusting the height of the adjustable support leg to be different from the height of the fixed support leg, the steering angle measuring device is tilted relative to the horizontal plane.

[0017] In one possible implementation, the adjustable height support leg includes a support sleeve and an adjusting screw; the support sleeve is disposed at the bottom of the fixed base and has an internal threaded hole inside; the outer wall of the adjusting screw has an external thread corresponding to the internal threaded hole.

[0018] In one possible implementation, the bottom of the fixed-height support leg is a spherical structure; the bottom of the adjusting screw is a planar structure.

[0019] One or more technical solutions provided in the embodiments of this application have at least the following technical effects:

[0020] The steering angle measuring device provided in this application includes a tire fixing device, a fixed base, a rotating part, an angle measuring device, and at least two cursor transmitters. The tire fixing device is used to fix the steering tire of the aircraft; the rotating part is rotatably mounted on the fixed base and fixedly connected to the side of the tire fixing device away from the steering tire, rotating synchronously when the steering tire rotates; at least two cursor transmitters are arranged opposite each other on the outer wall of the fixed base and can rotate flexibly along the longitudinal direction of the fixed base. The cursor transmitters can emit light beams and precisely point the beams to a specific position on the aircraft. In actual operation, by pointing the beams emitted by the cursor transmitters to a specific position, the preset position of the fixed base is precisely aligned with the aircraft axis. The angle measuring device is used to measure the rotation angle of the rotating part in real time and accurately, thereby indirectly obtaining the steering angle of the steering tire. The steering angle measuring device of this application, on the one hand, achieves alignment between the fixed base and the aircraft axis through the cursor transmitter, laying the foundation for subsequent accurate measurement of the steering angle; on the other hand, it directly measures the rotation angle of the rotating part using the angle measuring device, getting rid of the limitations of traditional manual measurement methods, improving the accuracy and efficiency of steering angle measurement, reducing the workload of personnel, and providing reliable protection for the steering angle control of the aircraft in key stages such as takeoff and landing, effectively improving the mission execution efficiency and flight safety of the aircraft. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the steering angle measuring device provided in the embodiments of this application;

[0023] Figure 2 This is a schematic diagram of the fastening assembly provided in an embodiment of this application;

[0024] Figure 3 This is a schematic diagram of the rotating part provided in an embodiment of this application;

[0025] Figure 4 This is a schematic diagram of the structure of the fixed base provided in the embodiment of this application;

[0026] Figure 5 This is a schematic diagram of the structure of the cursor launching device provided in the embodiments of this application;

[0027] Figure 6 This is a schematic diagram of the tilt adjustment component provided in an embodiment of this application.

[0028] Icons: 1-Tire fixing device; 11-Limiting groove; 111-Longitudinal stop bar; 1111-Slide groove; 12-Fastening assembly; 121-Transverse stop bar; 122-Vertical bar; 1221-Moving groove; 123-Diagonal brace; 124-First fastener; 2-Rotating part; 21-Radial marking line; 3-Fixed base; 31-Second fastener; 4-Cursor transmitter; 5-Angle measuring device; 51-Sensor; 52-Scale line; 6-Tilt adjustment assembly; 61-Fixed height support leg; 611-Spherical structure; 62-Adjustable height support foot; 621-Support sleeve; 622-Adjusting screw; 623-Planar structure; 7-Steering tire; 8-Fixed frame. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] In the description of the embodiments of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the embodiments of this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0031] This application provides a steering angle measuring device, such as... Figures 1 to 6 As shown. The steering angle measuring device includes a tire fixing device 1, a fixed base 3, a rotating part 2, an angle measuring device 5, and at least two cursor emitting devices 4. The tire fixing device 1 is used to fix the steering tire 7 of the aircraft. The rotating part 2 is rotatably mounted on the fixed base 3 and fixedly connected to the side of the tire fixing device 1 away from the steering tire 7. At least two cursor emitting devices 4 are disposed opposite to each other on the outer wall of the fixed base 3 and can rotate longitudinally along the fixed base 3. The cursor emitting devices 4 are used to emit light beams and point the emitted light beams to a specific position of the aircraft. By pointing the light beams emitted by the cursor emitting devices 4 to a specific position, the preset position of the fixed base 3 is aligned with the aircraft axis. The angle measuring device 5 is used to measure the rotation angle of the rotating part 2.

[0032] It should be noted that the tire fixing device 1 is used to fix the steering tire 7 of the aircraft; the rotating part 2 is rotatably mounted on the fixed base 3 and fixedly connected to the side of the tire fixing device 1 away from the steering tire 7. When the steering tire 7 rotates, the rotating part 2 rotates synchronously; at least two cursor emitting devices 4 are arranged opposite each other on the outer wall of the fixed base 3 and can rotate flexibly along the longitudinal direction of the fixed base 3. The cursor emitting device 4 can emit a beam of light and accurately point the beam of light to a specific position of the aircraft. In actual operation, by pointing the beam of light emitted by the cursor emitting device 4 to a specific position, the preset position of the fixed base 3 is aligned with the aircraft axis. The angle measuring device 5 is used to measure the rotation angle of the rotating part 2 in real time and accurately, thereby indirectly obtaining the steering angle of the steering tire 7. The steering angle measuring device of this application, on the one hand, achieves alignment between the fixed base 3 and the aircraft axis through the cursor transmitter 4, laying the foundation for subsequent accurate measurement of the steering angle; on the other hand, it directly measures the rotation angle of the rotating part 2 using the angle measuring device 5, getting rid of the limitations of traditional manual measurement methods, improving the accuracy and efficiency of steering angle measurement, reducing the workload of personnel, providing reliable guarantee for the steering angle control of the aircraft in key stages such as takeoff and landing, and effectively improving the mission execution efficiency and flight safety of the aircraft.

[0033] In one embodiment of this application, the side wall of the rotating part 2 is provided with a second mounting hole, and the fixed base 3 is provided with a corresponding third mounting hole. By passing one end of the second fastener 31 through the third mounting hole and the second mounting hole in sequence, the rotating part 2 and the fixed base 3 can be locked together.

[0034] Furthermore, the second fastener 31 selected in this application is a wing bolt. Wing bolts require no additional tools; operators can easily tighten or loosen them by hand. This feature greatly simplifies the installation and disassembly process between the rotating part 2 and the fixed base 3, improving operational convenience and efficiency. In practical applications, when the angle measuring device 5 needs to read values, or when it is necessary to restrict the rotation of the steering tire 7 for safety reasons, the operator can quickly use the wing bolt to tighten the rotating part 2, effectively preventing the steering tire 7 and the rotating part 2 from continuing to rotate, ensuring the smooth progress of the measurement work and the safety of the device.

[0035] In this embodiment, the angle measuring device 5 includes a sensor 51. The sensor 51 is fixedly mounted on the fixed base 3, and the rotating shaft of the sensor 51 is fixedly connected to the rotating part 2, so that when the rotating part 2 rotates, it drives the rotating shaft of the sensor 51 to rotate synchronously, thereby realizing the accurate capture and measurement of the rotation angle of the rotating part 2. Since the sensor 51 is directly associated with the rotating part 2, it can reflect the rotation status of the rotating part 2 in real time and accurately, thus improving the accuracy and reliability of angle measurement.

[0036] In this embodiment, the angle measuring device 5 includes a scale line 52 disposed on a fixed base 3. Two cursor transmitters 4 are respectively aligned with the reference point of the scale line 52. The top surface of the rotating part 2 is provided with a radial marker line 21 pointing to the reference point of the scale line 52. This application constructs an intuitive and accurate angle measurement reference system. The operator can quickly and clearly read the rotation angle of the rotating part 2 by using the relative positional relationship between the radial marker line 21 and the scale line 52, without the need for complex calculations or additional auxiliary tools, simplifying the angle measurement process and improving measurement efficiency. Moreover, the alignment of the cursor transmitter 4 with the reference point and the setting of the radial marker line 21 ensure the accuracy of the starting position of the angle measurement, effectively reducing measurement errors and improving the accuracy of the angle measurement.

[0037] In this embodiment, the tire fixing device 1 includes a limiting groove 11 and a fastening assembly 12. The limiting groove 11 is mounted on the top of the rotating part 2. The fastening assembly 12 is respectively disposed on both sides of the limiting groove 11 and can slide along the limiting groove 11 within a certain range.

[0038] In this embodiment, the fastening assembly 12 includes at least two transverse stops 121, at least two vertical rods 122, at least four diagonal braces 123, and at least two first fasteners 124. The limiting groove 11 includes at least two longitudinal stops 111, which are spaced apart on the top of the rotating part 2. Each longitudinal stop 111 has a sliding groove 1111 on both sides along its length. The two ends of the at least two transverse stops 121 are slidably connected to the corresponding sliding grooves 1111, and each transverse stop 121 has a first mounting hole at its end. The at least two vertical rods 122 are fixedly connected to the middle of the corresponding longitudinal stops 111 and have a moving groove 1221 along their length. Two diagonal braces 123 are located on the same side of the transverse stop 121, and two other diagonal braces 123 are located on the other side of the transverse stop 121. The two diagonal braces 123 on the same side of the transverse stop 121 are hinged at one end to each other, with the hinge point slidably connected to the moving groove 1221 of the corresponding vertical rod 122. The other ends are respectively hinged to the ends of the corresponding transverse stop 121. The diagonal braces 123 are used to drive the two transverse stops 121 to move synchronously towards or away from each other to clamp or release the aircraft's steering tire 7. At least two first fasteners 124 are configured such that when the two transverse stops 121 move to the position where they clamp the aircraft's steering tire 7, one end of which passes through the corresponding slide groove 1111 and connects to the corresponding first mounting hole to lock the longitudinal stop 111 and the transverse stop 121.

[0039] It should be noted that, in this embodiment, the tire fixing device 1, through the cooperation of the limiting groove 11 and the slidable fastening assembly 12, achieves efficient and precise fixing of the aircraft steering tire 7. The longitudinal stops 111 of the limiting groove 11 are spaced apart at the top of the rotating part 2 and have sliding grooves 1111 on both sides. The two ends of the transverse stops 121 of the fastening assembly 12 are slidably connected to the sliding grooves 1111. The vertical rod 122 is fixed to the middle of the longitudinal stops 111 and has a moving groove 1221. One end of the diagonal brace 123 is hinged to each other and slidably connected to the moving groove 1221 of the vertical rod 122, and the other end is hinged to the end of the transverse stops 121. This structure allows the diagonal brace 123 to drive the two transverse stops 121. 1. The steering tire 7 can be moved synchronously towards or away from each other, thereby quickly clamping or releasing it. This is convenient to operate and can be adapted to steering tires 7 of different sizes. At the same time, when the lateral stop bar 121 moves to the clamping position, the first fastener 124 passes through the slide groove 1111 and connects to the first mounting hole at the end of the lateral stop bar 121, locking the longitudinal stop bar 111 and the lateral stop bar 121. This ensures the stability of the fixation and effectively prevents the steering tire 7 from loosening during the measurement process, thus ensuring the accuracy and reliability of the steering angle measurement.

[0040] In this embodiment, the contact surface between the lateral stop bar 121 and the steering tire 7 is an inclined surface.

[0041] It should be noted that the sloping design allows the lateral stop bar 121 to make a closer contact with the steering tire 7, increasing the contact area and thus effectively dispersing the clamping force. This prevents damage to the steering tire 7 due to excessive local pressure and extends the service life of the steering tire 7.

[0042] In this embodiment, the cross-section of the end of the sensor 51's rotating shaft facing the rotating part 2 is a non-circular cross-section. A fourth mounting hole corresponding to the non-circular cross-section is provided in the middle of the rotating part 2.

[0043] It should be noted that the design of the non-circular cross section and the fourth mounting hole makes it possible to form a reliable anti-rotation connection between the rotating shaft of the sensor 51 and the rotating part 2. When the rotating part 2 rotates, it can accurately drive the rotating shaft of the sensor 51 to rotate synchronously, avoiding measurement errors caused by relative rotation between the rotating shaft of the sensor 51 and the rotating part 2, and improving the accuracy of angle measurement.

[0044] In this embodiment, the steering angle measuring device further includes a tilt adjustment assembly 6. The tilt adjustment assembly 6 includes at least two fixed-height support legs 61, both disposed at the bottom of the fixed base 3. At least one adjustable-height support leg 62 is disposed at the bottom of the fixed base 3. By adjusting the height of the adjustable-height support leg 62 to be different from the height of the fixed-height support legs 61, the steering angle measuring device can be tilted relative to the horizontal plane.

[0045] It should be noted that this application can simulate the actual tilt state of the turning tire 7 of an aircraft under different flight attitudes or ground conditions, thereby more realistically reproducing the flight scenario, making the angle measurement results more in line with actual application needs, and improving the accuracy and practicality of the measurement.

[0046] In this embodiment, the adjustable height support 62 includes a support sleeve 621 and an adjusting screw 622. The support sleeve 621 is disposed at the bottom of the fixed base 3, and has an internal threaded hole inside. The outer wall of the adjusting screw 622 has an external thread corresponding to the internal threaded hole.

[0047] In this embodiment, the bottom of the fixed-height support leg 61 is a spherical structure 611. The bottom of the adjusting screw 622 is a planar structure 623.

[0048] It should be noted that, in this embodiment, the adjustable height support leg 62 adopts a design with a support sleeve 621 and an adjusting screw 622. The support sleeve 621 is located at the bottom of the fixed base 3 and has an internal threaded hole. The adjusting screw 622 has a corresponding external thread on its outer wall. The height of the support leg can be precisely adjusted through the threaded engagement, thereby flexibly adjusting the tilt angle of the fixed base 3. At the same time, the bottom of the fixed height support leg 61 is a spherical structure 611, which can adapt to support surfaces with different inclinations and automatically adjust to a stable support state, enhancing the stability of the device placement. The bottom of the adjusting screw 622 is a flat structure 623, which can smoothly contact the ground or support surface when adjusting the height, ensuring the smoothness and reliability of the adjustment process. The combination of the two allows the steering angle measuring device to be stably placed and the tilt angle to be accurately adjusted under different terrains and attitudes, improving the accuracy of the measurement and the applicability of the device.

[0049] In one embodiment of this application, the steering angle measuring device further includes at least two fixing brackets 8. The at least two fixing brackets 8 are fixedly disposed circumferentially on the outer wall of the fixing base 3. The cursor emitting device 4 rotates longitudinally along the corresponding fixing base 3.

[0050] It should be noted that the mounting bracket 8 enhances the overall structural stability of the device, ensuring its stable placement during measurement and reducing shaking or displacement caused by external factors, thus guaranteeing the stability of the measurement environment. Furthermore, the longitudinal rotation of the cursor transmitter 4 along the fixed base 3 provides flexibility in angle adjustment. Operators can easily adjust the launch angle of the cursor transmitter 4 according to actual measurement needs, adapting to measurement scenarios with different turning angles. This improves the versatility and applicability of the device, thereby ensuring the accuracy and reliability of angle measurement results and providing strong support for the precise measurement of aircraft turning angles.

[0051] The operating procedure for the steering angle measuring device of this application during specific measurements is as follows:

[0052] First, the aircraft's steering tire 7 is placed inside the tire fixing device 1. By operating the fastening assembly 12, specifically by moving the lateral stop bar 121, the two lateral stop bars 121 are moved synchronously towards each other using the driving action of the diagonal brace 123, until the steering tire 7 is securely clamped, ensuring that the steering tire 7 will not shift during the measurement process.

[0053] Next, the cursor transmitter 4 is adjusted. The beam emitted from one of the cursor transmitters 4 is precisely aligned with the center of the aircraft's nose, while the beam emitted from the other cursor transmitter 4 is aligned with the tail fin or the center of the fuselage. This beam alignment operation achieves precise alignment between the steering angle measuring device and the aircraft's central axis, laying the foundation for accurate subsequent measurements.

[0054] Next, the neutral position calibration of the steering tire 7 is performed. The steering tire 7 is deflected by controlling the steering control system of the aircraft, while closely observing the radial mark line 21 on the rotating part 2. When the radial mark line 21 is completely aligned with the reference point of the scale line 52 on the fixed base 3, it indicates that the steering tire 7 is in the neutral position, and the neutral position calibration is completed.

[0055] After the steering tire 7 is calibrated in a neutral position, sensor 51 is set to zero to ensure the accuracy of subsequent measurements. Then, a preset deflection angle is input into the aircraft's flight control system. The aircraft's steering control system drives the steering tire 7 to deflect according to the input command. During the steering process, the steering deflection angle can be directly read by observing the scale value on the fixed base 3 pointed to by the radial mark line 21 of the rotating part 2.

[0056] After the steering operation is completed, in order to prevent the rotating part 2 from deflecting when reading the value and affecting the accuracy of the measurement result, tighten the second fastener 31 to fix the rotating part 2 relative to the fixed base 3.

[0057] In addition, sensor 51 has the function of converting angular displacement into electrical signals. It can convert the angular displacement of the steering tire 7 during the measurement process into electrical signals, and collect steering angle and speed data through external data processing equipment (such as PLC, computer), providing reliable data support for the analysis and evaluation of aircraft steering performance.

[0058] The steering angle measuring device involved in this application is a simple-to-operate steering measurement tool. This device possesses excellent versatility, not only playing a crucial role in aircraft testing scenarios by accurately measuring steering angles and providing reliable data support for aircraft steering performance evaluation and tuning; but also its application can be further expanded into the vehicle field, especially unmanned vehicles, meeting their needs for steering angle measurement and tuning, and contributing to the optimization and improvement of vehicle steering systems.

[0059] The various embodiments in this specification are described in a progressive manner. For the same or similar parts between the various embodiments, please refer to each other. Each embodiment focuses on describing the differences from other embodiments.

[0060] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of this application.

Claims

1. A steering angle measuring device, characterized in that, include: Tire fixing device (1), used to fix the aircraft's steering tires (7); The rotating part (2) is rotatably mounted on the fixed base (3) and fixedly connected to the side of the tire fixing device (1) away from the steering tire (7); At least two cursor emitting devices (4) are disposed opposite to each other on the outer wall of the fixed base (3) and can rotate longitudinally along the fixed base (3). The cursor emitting device (4) is used to emit a beam of light and point the emitted beam of light to a specific position of the aircraft. By pointing the beam of light emitted by the cursor emitting device (4) to a specific position, the preset position of the fixed base (3) is aligned with the axis of the aircraft. An angle measuring device (5) is used to measure the rotation angle of the rotating part (2).

2. The steering angle measuring device according to claim 1, characterized in that, The angle measuring device (5) includes a sensor (51); The sensor (51) is fixedly mounted on the fixed base (3), and the rotating shaft of the sensor (51) is fixedly connected to the rotating part (2), so that when the rotating part (2) rotates, it drives the rotating shaft of the sensor (51) to rotate synchronously.

3. The steering angle measuring device according to claim 1, characterized in that, The angle measuring device (5) includes a scale line (52) disposed on the fixed base (3); The two cursor transmitters (4) are respectively aligned with the reference point of the scale line (52).

4. The steering angle measuring device according to claim 1, characterized in that, The tire fixing device (1) includes a limiting groove (11) and a fastening assembly (12); The limiting groove (11) is installed on the top of the rotating part (2); The fastening components (12) are respectively disposed on both sides of the limiting groove (11) and can slide along the limiting groove (11) within a certain range.

5. The steering angle measuring device according to claim 4, characterized in that, The fastening assembly (12) includes at least two horizontal stops (121), at least two vertical bars (122), at least four diagonal braces (123), and at least two first fasteners (124); The limiting groove (11) includes at least two longitudinal stops (111), and the at least two longitudinal stops (111) are spaced apart on the top of the rotating part (2). Each longitudinal stop (111) has a sliding groove (1111) on both sides along its length direction. At least two of the transverse stops (121) are slidably connected at both ends to the corresponding slide grooves (1111), and each of the transverse stops (121) is provided with a first mounting hole at its end; At least two of the vertical rods (122) are fixedly connected to the middle of the corresponding longitudinal stop (111), and are provided with a moving groove (1221) along their length direction; Two of the diagonal braces (123) are located on the same side of the transverse baffle (121), and the other two diagonal braces (123) are located on the other side of the transverse baffle (121). The two diagonal braces (123) located on the same side of the transverse baffle (121) have one end hinged to each other, and the hinge is slidably connected to the moving groove (1221) of the corresponding vertical rod (122). The other end is respectively hinged to the end of the corresponding transverse baffle (121). The diagonal braces (123) are used to drive the two transverse baffles (121) to move synchronously towards or away from each other to clamp or release the steering tire (7) of the aircraft. At least two first fasteners (124) are configured such that, when the two lateral stops (121) move to the position of clamping the steering tire (7) of the aircraft, one end of which passes through the corresponding groove (1111) and is connected to the corresponding first mounting hole to lock the longitudinal stop (111) and the lateral stop (121).

6. The steering angle measuring device according to claim 5, characterized in that, The contact surface between the lateral stop (121) and the steering tire (7) is an inclined surface.

7. The steering angle measuring device according to claim 2, characterized in that, The cross-section of the end of the sensor (51) shaft facing the rotating part (2) is a non-circular cross-section; The rotating part (2) has a fourth mounting hole in the middle that corresponds to the non-circular cross section.

8. The steering angle measuring device according to claim 1, characterized in that, It also includes a tilt adjustment component (6); The tilt adjustment assembly (6) includes: At least two fixed-height support legs (61) are provided at the bottom of the fixed base (3); At least one height-adjustable support leg (62) is disposed at the bottom of the fixed base (3); In this process, by adjusting the height of the adjustable height support leg (62) to be different from the height of the fixed height support leg (61), the steering angle measuring device is tilted relative to the horizontal plane.

9. The steering angle measuring device according to claim 8, characterized in that, The adjustable height support leg (62) includes a support sleeve (621) and an adjusting screw (622); The support sleeve (621) is located at the bottom of the fixed base (3), and has an internal threaded hole inside it; The outer wall of the adjusting screw (622) is provided with an external thread corresponding to the internal thread hole.

10. The steering angle measuring device according to claim 9, characterized in that, The bottom of the fixed-height support leg (61) is a spherical structure (611); The bottom of the adjusting screw (622) is a planar structure (623).

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