Throttle valve calibration device and method for aircraft engine of unmanned aerial vehicle

Abstract

The invention discloses a throttle valve calibration device and method for an aircraft engine of an unmanned aerial vehicle, and belongs to the field of unmanned aerial vehicles. Comprising a shell, an angle transmission module coupled to the shell, a measurement calibration module and a fixing module connected with a throttle valve air inlet pipe. The shell is fixedly installed at an air inlet pipe opening through the fixing module, and it is guaranteed that the free end of the angle transmission module is opposite to the throttle valve piece so that the opening rotating angle of the throttle valve piece can be obtained or controlled. The fixed end of the angle transmission module is connected with the measurement and calibration module, and transmits the obtained opening rotation angle of the throttle valve sheet to the measurement and calibration module or transmits the calibration angle output by the measurement and calibration module to the throttle valve sheet so as to complete a passive measurement mode and an active calibration mode. According to the method, the core pain point of calibration of the engine throttle valve of the unmanned aerial vehicle is effectively solved, the overall precision of the electronic throttle valve of the aircraft engine is improved, and the method has high market application value.

Description

Technical Field

[0001] The invention belongs to the field of unmanned aerial vehicles, and in particular relates to a throttle calibration device and method for an unmanned aerial vehicle aeroengine. Background Art

[0002] Most of the current UAVs use internal combustion engines as direct power, and the electronic throttle is an important component for achieving engine power control. In order to meet the requirements of lightweight design of aviation engines, most engines use non-feedback control. Improving the control accuracy of the electronic throttle is the key to improving the accuracy of engine injection control and ensuring engine consistency.

[0003] The electronic throttles in current equipment all use open-loop control. Affected by the machining accuracy of mechanical parts and the accuracy of sensor acquisition, the main problems are as follows:

[0004] 1. The high horsepower (100% throttle opening) position is inaccurate. After sending the high horsepower command, the actual throttle opening does not reach the maximum, or exceeds the maximum position, resulting in the engine intake volume not reaching the maximum value.

[0005] 2. The low horsepower (throttle opening 0%) position is inaccurate. After sending the low horsepower command, the actual opening of the throttle plate is not completely closed, resulting in inaccurate engine throttle zero point, or in a stuck state, causing the throttle motor to be in a stuck state for a long time, and the probability of failure is greatly increased.

[0006] Therefore, the present invention provides a throttle calibration mechanism with simple operation and high reliability, which realizes the convenience of throttle calibration and indirectly improves the life of the system and the convenience of operation. Summary of the invention

[0007] Technical issues to be solved:

[0008] In order to avoid the shortcomings of the prior art, the present invention provides a throttle calibration device for UAV aeroengines, which supports both passive measurement mode and active calibration mode, solving the problem that the throttle angle cannot be dynamically adjusted in traditional open-loop control. The throttle opening can be measured in real time through the angle sensor, and the calibration can be performed by actively presetting the angle through the coordinated control of the drive motor and the angle sensor, which significantly improves the calibration flexibility. The present invention effectively solves the core pain point of UAV engine throttle calibration, improves the overall accuracy of the electronic throttle of the aeroengine, and has a high market application value.

[0009] The technical solution of the present invention is: a throttle calibration device for a drone aeroengine, comprising a shell and an angle transmission module coupled thereto, a measurement and calibration module, and a fixing module connected to a throttle intake pipe; the shell is fixedly installed at the intake pipe port by the fixing module to ensure that the free end of the angle transmission module is opposite to the throttle plate to obtain or control the opening angle of the throttle plate; the fixed end of the angle transmission module is connected to the measurement and calibration module to transmit the obtained throttle plate opening angle to the measurement and calibration module, or to transmit the calibration angle output by the measurement and calibration module to the throttle plate to complete a passive measurement mode and an active calibration mode.

[0010] A further technical solution of the present invention is: a fixing module is installed at one end of the inner cavity of the shell, and an angle transfer module is installed at the other end, and an axial through hole is opened on the end face of one side of the fixing module as a channel for the free end of the angle transfer module to contact the throttle plate.

[0011] A further technical solution of the present invention is: the fixing module is a three-claw locking mechanism, the three claws are evenly distributed along the circumferential direction on the end face of the shell with an axial through hole, and the circumference is coaxial with the axial through hole; the three claws are synchronously moved radially by a driving assembly, and can adapt to throttle intake pipes of different diameters.

[0012] A further technical solution of the present invention is: three radial through grooves are evenly distributed along the circumferential direction on the end surface of the shell with the axial through hole, serving as radial movement guide grooves for the three claws; the claws are installed outside the radial movement guide grooves through claw seats; the claw seats are movably installed in the radial movement guide grooves, the top surface of which is equipped with claws, the bottom surface extends into the shell and is provided with a plane thread, and is connected to the drive assembly;

[0013] The driving assembly includes a chuck motor and a chuck body with a central through hole. The outer peripheral surface of the chuck body has teeth grooves evenly distributed in the circumferential direction to form a chuck body gear. A flat thread is provided on the end face of the chuck body coaxially with the axial through hole, and the flat thread is meshed with the flat thread of the claw seat. A chuck driving gear is installed on the output shaft of the chuck motor, which is meshed with the chuck body gear to drive it to rotate, and then the claw seat and the claw are driven to move radially through the flat thread of the chuck body. The coaxiality of the locking process is ensured by the radial movement guide groove to avoid measurement errors caused by installation deviations.

[0014] A further technical solution of the present invention is that the angle transmission module is a connecting rod structure, including a U-shaped connecting arm and a first measuring rod and a second measuring rod rotatably connected thereunder, the first measuring rod and the second measuring rod are parallel to each other and have the same axial length, and are connected to form a four-bar connecting rod structure by a straight connecting arm rotatably connected below the first measuring rod and the second measuring rod;

[0015] The U-shaped connecting arm serves as a fixed end and is connected to the measurement and calibration module through a fixing rod; the fixing rod and the U-shaped connecting arm are located in the same plane and are vertically fixed to the two side arms to transmit or control the rotation angle of the U-shaped connecting arm;

[0016] The top ends of the first measuring rod and the second measuring rod are rotatably connected to the U-shaped connecting arm, and their bottom ends serve as the free ends of the angle transmission module facing the throttle plate, and the straight line where the bottom ends of the first measuring rod and the second measuring rod are located is parallel to the two side arms of the U-shaped connecting arm, thereby realizing error-free transmission of the angle.

[0017] A further technical solution of the present invention is: the measurement and calibration module includes an angle sensor and a drive motor, the throttle plate angle is passively measured by the angle sensor, the fixed rod angle is controlled by the drive motor, and the throttle plate angle is actively calibrated.

[0018] A further technical solution of the present invention is that: both ends of the fixing rod respectively penetrate the housing in the radial direction and are respectively installed in the axial guide groove of the outer periphery of the housing through the guide blocks, the guide block at one end thereof protruding from the housing is installed with an angle sensor, and the guide block at the other end thereof protruding from the housing is installed with a drive motor bracket; and the other end of the fixing rod is rotatably connected to the guide block at the end;

[0019] The angle sensor is used to measure the rotation angle of the fixed rod and the U-shaped connecting arm;

[0020] The driving motor bracket is provided with a driving motor and a transmission assembly, and the driving motor is connected to the other end of the fixing rod through the transmission assembly, so as to control the rotation angle of the fixing rod and the U-shaped connecting arm.

[0021] A further technical solution of the present invention is: the measurement and calibration module also includes a control rod, which is arranged parallel to the axial guide groove of the shell, one end of which passes through the threaded hole of the shell and is rotatably connected to the guide block for installing the angle sensor, and the other end is located on the outside of the shell; the rod portion of the control rod is provided with an external thread, which cooperates with the threaded hole of the shell, and the axial displacement of the control rod is achieved by screwing, thereby further controlling the guide block for installing the angle sensor to move along the axial guide groove, thereby completing the control of the axial position of the angle transfer module.

[0022] A passive measurement method for a throttle calibration device of a UAV aeroengine, the specific steps are as follows:

[0023] The throttle calibration device for the UAV aviation engine is clamped and installed at the pipe opening of the throttle intake pipe through a three-claw locking mechanism;

[0024] The axial position of the angle transmission module is adjusted by rotating the control rod so that the free end of the angle transmission module contacts the throttle plate, and the rotation angle of the throttle plate is obtained by the adaptive deformation of the connecting rod structure;

[0025] The rotation angle is transmitted to the angle sensor through the fixed rod, that is, the rotation angle of the throttle plate is measured;

[0026] Repeat the above steps to measure different throttle angles;

[0027] When the measurement is completely finished, rotate the control lever in the opposite direction to push the angle transmission module away from the throttle plate, release the claw lock, and end the measurement.

[0028] An active calibration method for a throttle calibration device of a UAV aeroengine, the specific steps are as follows:

[0029] The throttle calibration device for the UAV aviation engine is clamped and installed at the pipe opening of the throttle intake pipe through a three-claw locking mechanism;

[0030] The angle transfer module is turned to a preset angle by controlling the drive motor and the angle sensor, and the drive motor is kept locked;

[0031] Release the electronic throttle control to keep the electronic throttle in a free state;

[0032] The axial position of the angle transmission module is adjusted by rotating the control rod so that the free end of the angle transmission module contacts the throttle plate, and the rotation angle of the throttle plate is adjusted, that is, the active control and calibration of the throttle angle is completed;

[0033] Repeat the above steps to adjust different calibration angles;

[0034] When the measurement is completely completed, rotate the control lever in the opposite direction, push the angle transfer module away from the throttle plate, release the claw lock, and end the calibration.

[0035] Beneficial Effects

[0036] The beneficial effects of the present invention are: the device of the present invention solves the core pain points in the calibration of the throttle of the UAV engine through dual-mode calibration, adaptive locking mechanism, automatic control and modular design, and has the advantages of high precision, high versatility, convenient operation, safety and reliability, and has significant application value. The specific advantages are analyzed as follows:

[0037] 1. The dual-mode calibration function of the present invention supports passive measurement mode (real-time detection of throttle opening) and active calibration mode (preset angle forced adjustment), which solves the problem of the inability to dynamically correct the angle in traditional open-loop control and improves accuracy and flexibility. Through the coordinated control of the angle sensor (such as the sensor on the U-shaped connecting arm) and the drive motor, closed-loop feedback is achieved to ensure calibration accuracy (such as accurate calibration of high horsepower 100% and low horsepower 0% positions), avoiding throttle opening deviation caused by machining errors.

[0038] 2. The fixing module designed in the present invention is a three-jaw locking mechanism, which adopts a three-jaw chuck design driven by a plane thread. The chuck motor drives the jaws to move radially synchronously, which is suitable for adaptive locking of intake pipes of different diameters (such as a wide adjustable diameter range). The guide groove design ensures coaxiality, avoids installation errors affecting the measurement results, and enhances versatility.

[0039] The first measuring rod and the second measuring rod that constitute the connecting rod structure are always parallel. Through the control rod (external thread design) with adjustable axial position, they can adapt to throttle structures of different depths, ensure the stability of the contact between the measuring rod and the throttle plate, realize error-free angle transmission, and reduce measurement errors caused by mechanical deformation.

[0040] 3. The present invention uses the preset angle of the driving motor and the real-time feedback of the angle sensor to reduce manual intervention and achieve a high degree of automation in the calibration process. The axial position of the measuring rod can be adjusted by twisting the control rod, which is simple to operate and does not require complex tools, significantly shortening the calibration time.

[0041] 4. The present invention optimizes the engine air intake control by accurately calibrating the throttle opening, improving the injection accuracy and combustion efficiency, thereby enhancing the power consistency and operability of the UAV and significantly improving the engine performance. It also reduces the risk of throttle motor stalling, reduces the failure rate, and prolongs the engine service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a structural diagram of a throttle calibration device for a UAV aeroengine in an embodiment of the present invention;

[0043] Figure 2 This is a composition diagram of a three-claw locking mechanism in an embodiment of the present invention;

[0044] Figure 3 It is a composition diagram of the driving mechanism in an embodiment of the present invention;

[0045] Figure 4 It is a composition diagram of the connecting rod mechanism in an embodiment of the present invention;

[0046] Figure 5 is a schematic diagram of a fixed mode in an embodiment of the present invention;

[0047] Figure 6 is a schematic diagram of the working mode in an embodiment of the present invention;

[0048] Figure 7 Schematic diagram of the measurement principle in the embodiment of the present invention.

[0049] Explanation of the accompanying drawings: 1. front shell, 101. radial displacement guide groove, 2. rear shell, 201. axial displacement guide groove, 3. chuck motor bracket, 4. chuck motor, 5. cover plate, 6. drive motor bracket, 7. drive motor, 8. angle sensor, 9. sensor guide block, 10. control rod, 11. claw (quantity 3), 12. retaining spring, 13. chuck body, 131. chuck body gear, 132. chuck body flat thread, 14. chuck drive gear, 15. claw seat (quantity 3), 16. drive gear guide block, 17. drive gear, 18. drive motor gear, 19. first measuring rod, 20. second measuring rod, 21. first connecting shaft, 22. linear connecting arm, 23. second connecting shaft, 24. third connecting shaft, 25. fourth connecting shaft, 26. U-shaped connecting arm, 27. intake pipe, 28. throttle plate, 29. fixing rod. DETAILED DESCRIPTION

[0050] The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0051] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0052] Based on the fact that the electronic throttles in the current equipment all adopt open-loop control, which is affected by the machining accuracy of mechanical parts and the acquisition accuracy of sensors, the engine intake volume cannot be accurately measured and controlled. The present invention provides a throttle calibration device for unmanned aerial vehicle aviation engines, comprising a shell and an angle transmission module coupled thereto, a measurement and calibration module, and a fixing module connected to the throttle intake pipe; the shell is fixedly installed on the intake pipe port by the fixing module to ensure that the free end of the angle transmission module is opposite to the throttle plate, so as to obtain or transmit the opening angle of the throttle plate; the fixed end of the angle transmission module is connected to the measurement and calibration module, and the obtained throttle plate opening angle is transmitted to the measurement and calibration module, or the calibration angle output by the measurement and calibration module is transmitted to the throttle plate, so as to complete the passive measurement mode and the active calibration mode.

[0053] Preferably, a fixing module is installed at one end of the inner cavity of the shell, and an angle transfer module is installed at the other end. An axial through hole is opened on the end face of one side of the fixing module as a channel for the free end of the angle transfer module to contact the throttle plate.

[0054] Preferably, the fixing module is a three-claw locking mechanism, and the three claws are evenly distributed along the circumferential direction on the end face of the shell with an axial through hole, and the circumference is coaxial with the axial through hole; the three claws are synchronously moved radially by the driving assembly, and can adapt to throttle intake pipes of different diameters.

[0055] Preferably, three radial through grooves are evenly distributed along the circumferential direction on the end surface of the shell with the axial through hole, serving as radial movement guide grooves for the three claws; the claws are installed outside the radial movement guide grooves through claw seats; the claw seats are movably installed in the radial movement guide grooves, the top surface of which is equipped with claws, the bottom surface extends into the shell and is provided with a flat thread, and is connected to the drive assembly;

[0056] The driving assembly includes a chuck motor and a chuck body with a central through hole. The outer peripheral surface of the chuck body has teeth grooves evenly distributed in the circumferential direction to form a chuck body gear. A flat thread is provided on the end face of the chuck body coaxially with the axial through hole, and the flat thread is meshed with the flat thread of the claw seat. A chuck driving gear is installed on the output shaft of the chuck motor, which is meshed with the chuck body gear to drive it to rotate, and then the claw seat and the claw are driven to move radially through the flat thread of the chuck body. The coaxiality of the locking process is ensured by the radial movement guide groove to avoid measurement errors caused by installation deviations.

[0057] Preferably, the angle transmission module is a connecting rod structure, including a U-shaped connecting arm and a first measuring rod and a second measuring rod rotatably connected thereunder, the first measuring rod and the second measuring rod are parallel to each other and have the same axial length, and are connected to form a four-bar connecting rod structure by a linear connecting arm rotatably connected below the first measuring rod and the second measuring rod;

[0058] The U-shaped connecting arm serves as a fixed end and is connected to the measurement and calibration module through a fixing rod; the fixing rod and the U-shaped connecting arm are located in the same plane and are vertically fixed to the two side arms to transmit or control the rotation angle of the U-shaped connecting arm;

[0059] The top ends of the first measuring rod and the second measuring rod are rotatably connected to the U-shaped connecting arm, and their bottom ends serve as the free ends of the angle transmission module facing the throttle plate, and the straight line where the bottom ends of the first measuring rod and the second measuring rod are located is parallel to the two side arms of the U-shaped connecting arm, thereby realizing error-free transmission of the angle.

[0060] Preferably, the measurement and calibration module includes an angle sensor and a drive motor, and the throttle plate angle is passively measured by the angle sensor, and the fixed rod angle is controlled by the drive motor, thereby actively calibrating the throttle plate angle.

[0061] Preferably, both ends of the fixing rod respectively penetrate the housing in the radial direction and are respectively installed in the axial guide groove of the outer periphery of the housing through the guide blocks, the guide block at one end thereof protruding from the housing portion is installed with an angle sensor, and the guide block at the other end thereof protruding from the housing portion is installed with a drive motor bracket; and the other end of the fixing rod is rotatably connected to the guide block at the end;

[0062] The angle sensor is used to measure the rotation angle of the fixed rod and the U-shaped connecting arm;

[0063] The driving motor bracket is provided with a driving motor and a transmission assembly, and the driving motor is connected to the other end of the fixing rod through the transmission assembly, so as to control the rotation angle of the fixing rod and the U-shaped connecting arm.

[0064] Preferably, the measurement and calibration module also includes a control rod, which is arranged parallel to the axial guide groove of the shell, one end of which passes through the threaded hole of the shell and is connected to the guide block for installing the angle sensor, and the other end is located on the outside of the shell; the rod portion of the control rod is provided with an external thread, which cooperates with the threaded hole of the shell, and the axial displacement of the control rod is achieved by screwing, thereby further controlling the guide block for installing the angle sensor to move along the axial guide groove, thereby completing the control of the axial position of the angle transfer module.

[0065] The present invention solves the problem of inaccurate throttle opening in traditional open-loop control through passive and active dual-mode calibration combined with real-time feedback from the angle sensor, ensures accurate calibration of high horsepower (100%) and low horsepower (0%) positions, reduces the risk of motor stalling, and extends equipment life.

[0066] The above technical solution is further described below in conjunction with the accompanying drawings:

[0067] In one embodiment, referring to Figure 1 , 2 As shown, the throttle calibration device for a UAV aeroengine of this embodiment includes a housing, an angle sensor 8, a three-claw locking mechanism, an angle transmission module and a measurement calibration module. The three-claw locking mechanism is used to connect and fix the device with the electronic throttle to be calibrated, and keep the electronic throttle and the mechanism coaxial. The driving mechanism is used for the rotation control of the connecting rod mechanism, and the connecting rod mechanism is used for the calibration and measurement of the electronic throttle.

[0068] In one embodiment, the shell is formed by a front shell 1, a rear shell 2 and a cover plate 5 which are coaxially fixedly connected. The front shell 1 is an annular structure with a central through hole and an L-shaped radial cross section; the main body of the rear shell 2 is a hollow sleeve structure, one end of which is coaxially fixedly mounted with an annular disk, the inner ring surface of the annular disk extends axially toward the front shell 1, and is coaxially mounted with the front shell 1 with the same diameter as the central through hole, and its outer ring surface is coaxially fixed with the circumferential surface of the front shell to form a cavity for installing a three-claw locking mechanism; the other end is encapsulated with a cover plate 5; the sleeve contains a cavity for installing an angle transmission module.

[0069] Specifically, three radial through grooves are evenly distributed along the circumferential direction on the outer end surface of the front housing 1 for mounting three claw seats, which serve as radial displacement guide grooves 101 of the claw seats.

[0070] Specifically, two axial through grooves are symmetrically arranged on the outer peripheral surface of the rear housing 2 , and the sensor guide block 9 and the driving gear guide block 16 are respectively installed thereon, serving as the axial displacement guide grooves 201 of the guide blocks.

[0071] In one embodiment, referring to Figure 2 As shown, the three-claw locking mechanism includes a chuck motor bracket 3, a chuck motor 4, a claw 11, a clamping spring 12, a chuck body 13, a chuck driving gear 14, and a claw seat 15. The outer periphery of the chuck body 13 is provided with a tooth groove to form a chuck body gear 131, and the end surface thereof is provided with a chuck body plane thread 132. The claw 11 is an L-shaped plate, one side plate of which is parallel to the axial direction of the chuck body 13, the other side plate of which is parallel to the end surface of the chuck body 13, and the other end of which is fixedly mounted on the claw seat 15. The claw seat 15 is an I-shaped block structure, the upper end surface of which is provided with the claw 11, the lower end surface is provided with a plane thread engaged with the chuck body plane thread 132, and the grooves on both sides are clamped in the radial displacement guide groove 101.

[0072] Specifically, the chuck body 13 is rotatably connected to the circumference of the extended portion of the inner ring surface of the annular disk, and the axial displacement during rotation is limited by the clamping spring 12. The chuck motor 4 is installed on the outer end surface of the annular disk of the rear housing through the chuck motor bracket 3, and its output shaft passes through the annular disk, and a chuck driving gear 14 is installed at the output end to mesh with the chuck body gear 131. The chuck driving gear 14 and the chuck body gear 131 are driven to rotate by the chuck motor 4, and then the rotational motion of the chuck body 13 is converted into the linear motion of the chuck body 13 and the claw 11 along the radial displacement guide groove 101 by the chuck body plane thread 132, and the intake pipe 27 is locked by adjusting the radial displacement position.

[0073] In one embodiment, referring to Figure 4As shown, the angle transmission module includes a sensor guide block 9, a driving gear guide block 16, a first measuring rod 19, a second measuring rod 20, a first connecting shaft 21, a linear connecting arm 22, a second connecting shaft 23, a third connecting shaft 24, a fourth connecting shaft 25, a U-shaped connecting arm 26, and a fixed rod 29. The first measuring rod 19, the second measuring rod 20, the linear connecting arm 22, and the U-shaped connecting arm 26 constitute a connecting rod structure.

[0074] Specifically, fixed rods 29 are fixed to the outer sides of the two side arms of the U-shaped connecting arm 26, and the fixed rods 29 on both sides are located in the radial direction of the rear shell body 2 and are coaxial, and are axially located in the plane where the U-shaped connecting arm 26 is located; a sensor guide block 9 is fixed to the end of the fixed rod 29 on one side, and a driving gear guide block 16 is rotatably connected to the end of the fixed rod 29 on the other side; the sensor guide block 9 and the driving gear guide block 16 are respectively located in the axial displacement guide groove 201 of the rear shell body 2.

[0075] Specifically, the first measuring rod 19 is a straight rod, the top end of which is rotatably connected to the U-shaped connecting arm 26 via a third connecting shaft 24 , and a spherical contact is installed at the bottom end, and the spherical contact faces the throttle plate 28 .

[0076] Specifically, the second measuring rod 20 is a bent rod, the top end of which is rotatably connected to the U-shaped connecting arm 26 via a fourth connecting shaft 25 , and a spherical contact is installed at the bottom end, and the spherical contact faces the throttle plate 28 .

[0077] Specifically, the two ends of the linear connecting arm 22 are rotatably connected to the lower ends of the first measuring rod 19 and the second measuring rod 20 through the second connecting shaft 23 and the first connecting shaft 21 respectively.

[0078] In one embodiment, referring to Figure 3 , 4 As shown, the measurement and calibration module includes a drive motor bracket 6, a drive motor 7, an angle sensor 8, a control rod 10, a drive gear 17, and a drive motor gear 18. The drive gear 17 and the drive motor gear 18 constitute a transmission assembly, which transmits the rotation angle of the drive gear 17 to the fixed rod 29.

[0079] Specifically, the angle sensor 8 is fixedly mounted on the outer side of the sensor guide block 9 and is used to measure the rotation angle transmitted by the fixing rod 29 .

[0080] Specifically, the driving motor 7 is fixedly mounted on the outer side of the driving gear guide block 16 via the driving motor bracket 6, and a driving motor gear 18 is mounted on the output shaft thereof.

[0081] Specifically, the driving gear 17 is sleeved on the end of the fixing rod 29 and meshes with the driving motor gear 18 to form a transmission assembly.

[0082] Specifically, the control rod 10 is a straight rod with an external thread on the rod portion, one end of which passes through the threaded hole on the cover plate 5, and the end of which is rotatably connected to the sensor guide block 9. The axial displacement of the sensor guide block 9 is controlled by screwing the control rod 10, and the axial displacement of the angle transmission module as a whole is controlled by the fixing rod 29 to achieve contact and separation with the throttle plate.

[0083] In one embodiment, referring to Figure 5 As shown, a specific operation of fixing a throttle calibration device and an intake pipe for a UAV aero-engine is as follows:

[0084] Before calibration, three claws 11 are inserted into the electronic throttle intake pipe 27, and the chuck motor 4 is powered. The chuck drive gear 14 installed on the chuck motor 4 rotates, and the chuck body 13 is driven to rotate through gear meshing. The front end of the chuck body 13 has a flat thread 132. The claw seat 15 (number 3) is meshed with the flat thread, and when the chuck body 13 rotates, the claws 11 are driven to move along the radial displacement guide groove 101. When the chuck body 13 rotates, the intake pipe 27 is locked by the three claws 11. After the locking is completed, the chuck motor 4 is powered off.

[0085] After the calibration test is completed, the claw motor 4 is powered in reverse, the claw 11 is separated from the intake pipe, and the fixation is released.

[0086] In one embodiment, referring to Figure 6 As shown, a throttle calibration device for a UAV aero-engine performs specific operations of passively measuring the throttle:

[0087] After the throttle intake pipe 27 is fixed with the three-claw locking mechanism, the locking state of the drive motor 7 is released, and the control rod 10 is rotated to push the connecting rod measuring mechanism (angle transmission module) toward the throttle plate 28 through the sensor guide block 9, so that the first measuring rod 19 and the second measuring rod 20 of the connecting rod mechanism are kept in contact with the throttle plate 28. Since the first measuring rod 19 and the second measuring rod 20 of the connecting rod mechanism are always in a parallel state, the angle of the throttle plate 28 is the same as the angle of the U-shaped connecting arm 26, and the corresponding angle of the throttle plate 28 can be measured by the angle sensor 8 installed on the U-shaped connecting arm 26.

[0088] After a certain angle measurement is completed, the throttle opening is adjusted, the throttle plate 28 is rotated, and the above steps are repeated as needed to complete other angle measurements.

[0089] When the measurement is completely finished, the control rod 10 is rotated in the opposite direction, and the connecting rod measuring mechanism is pushed away from the throttle plate 28 through the sensor guide block 9, the locking of the claw 11 is released, and the measurement is finished.

[0090] In one embodiment, referring to Figure 7As shown, a throttle calibration device for a UAV aero-engine performs specific operations for active throttle calibration:

[0091] After the throttle intake pipe 27 is fixed with the three-claw locking mechanism, the locking state of the drive motor 7 is released, and the U-shaped connecting arm 26 is rotated to a preset angle through the drive motor 7 and the angle sensor 8, and the drive motor 7 is kept locked. The electronic throttle control is released to keep the electronic throttle in a free state, and the control rod 10 is rotated to push the connecting rod measuring mechanism toward the throttle plate 28 through the sensor guide block 9, so that the first measuring rod 19 and the second measuring rod 20 of the connecting rod mechanism are kept in contact with the throttle plate 28. Since the first measuring rod 19 and the second measuring rod 20 of the connecting rod mechanism are always in a parallel state, the angle of the throttle plate 28 is the same as the angle of the U-shaped connecting arm 26, and the active control and calibration of the throttle angle can be completed.

[0092] After a certain angle calibration is completed, the above operation is repeated to adjust the U-shaped connecting arm 26 to a new calibration angle to complete the calibration.

[0093] When the calibration is completely finished, the control rod 10 is rotated in the opposite direction, and the connecting rod measuring mechanism is pushed away from the throttle plate 28 through the sensor guide block 9, the locking of the claw 11 is released, and the calibration is finished.

[0094] Safety Warning

[0095] This mechanism is a throttle calibration device. When in use, the related motors must be turned on and off as needed to avoid all motors being powered on at the same time, causing motor stalling and damage.

[0096] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and intent of the present invention.

Claims

1. A throttle calibration device for a UAV aero-engine, characterized in that: It includes a shell and an angle transmission module coupled thereto, a measurement and calibration module, and a fixing module connected to the throttle intake pipe; the shell is fixedly installed on the intake pipe opening through the fixing module to ensure that the free end of the angle transmission module is opposite to the throttle plate to obtain or control the opening angle of the throttle plate; the fixed end of the angle transmission module is connected to the measurement and calibration module to transmit the obtained throttle plate opening angle to the measurement and calibration module, or to transmit the calibration angle output by the measurement and calibration module to the throttle plate to complete the passive measurement mode and the active calibration mode.

2. A throttle calibration device for a UAV aeroengine according to claim 1, characterized in that: A fixing module is installed at one end of the inner cavity of the shell, and an angle transmission module is installed at the other end. An axial through hole is opened on the end surface of one side where the fixing module is installed, serving as a channel for the free end of the angle transmission module to contact the throttle plate.

3. A throttle calibration device for a UAV aeroengine according to claim 2, characterized in that: The fixing module is a three-claw locking mechanism, in which the three claws are evenly distributed along the circumferential direction on the end face of the shell with an axial through hole, and the circumference is coaxial with the axial through hole; the three claws are synchronously moved radially by the driving assembly, and can adapt to throttle intake pipes of different diameters.

4. A throttle calibration device for a UAV aeroengine according to claim 3, characterized in that: The end surface of the shell with an axial through hole is provided with three radial through grooves evenly distributed along the circumferential direction, serving as radial movement guide grooves for the three claws; the claws are installed outside the radial movement guide grooves through claw seats; the claw seats are movably installed in the radial movement guide grooves, the top surface of which is provided with claws, the bottom surface of which extends into the shell and is provided with a flat thread, and is connected to the drive assembly; The driving assembly includes a chuck motor and a chuck body with a central through hole. The outer peripheral surface of the chuck body has teeth grooves evenly distributed in the circumferential direction to form a chuck body gear. A flat thread is provided on the end face of the chuck body coaxially with the axial through hole, and the flat thread is meshed with the flat thread of the claw seat. A chuck driving gear is installed on the output shaft of the chuck motor, which is meshed with the chuck body gear to drive it to rotate, and then the claw seat and the claw are driven to move radially through the flat thread of the chuck body. The coaxiality of the locking process is ensured by the radial movement guide groove to avoid measurement errors caused by installation deviations.

5. A throttle calibration device for a UAV aeroengine according to claim 4, characterized in that: The angle transmission module is a connecting rod structure, including a U-shaped connecting arm and a first measuring rod and a second measuring rod rotatably connected thereunder, the first measuring rod and the second measuring rod are parallel to each other and have the same axial length, and are connected to form a four-bar connecting rod structure by a straight connecting arm rotatably connected below the first measuring rod and the second measuring rod; The U-shaped connecting arm serves as a fixed end and is connected to the measurement and calibration module through a fixing rod; the fixing rod and the U-shaped connecting arm are located in the same plane and are vertically fixed to the two side arms to transmit or control the rotation angle of the U-shaped connecting arm; The top ends of the first measuring rod and the second measuring rod are rotatably connected to the U-shaped connecting arm, and their bottom ends serve as the free ends of the angle transmission module facing the throttle plate, and the straight line where the bottom ends of the first measuring rod and the second measuring rod are located is parallel to the two side arms of the U-shaped connecting arm, thereby realizing error-free transmission of the angle.

6. A throttle calibration device for a UAV aeroengine according to claim 5, characterized in that: The measurement and calibration module includes an angle sensor and a drive motor. The throttle plate angle is passively measured by the angle sensor, and the fixed rod angle is controlled by the drive motor, thereby actively calibrating the throttle plate angle.

7. A throttle calibration device for a UAV aeroengine according to claim 6, characterized in that: The two ends of the fixed rod respectively penetrate the housing in the radial direction and are respectively installed in the axial guide groove on the outer periphery of the housing through the guide blocks. The guide block at one end protrudes from the housing and is installed with an angle sensor, and the guide block at the other end protrudes from the housing and is installed with a drive motor bracket; and the other end of the fixed rod is rotatably connected to the guide block at the end; The angle sensor is used to measure the rotation angle of the fixed rod and the U-shaped connecting arm; The driving motor bracket is provided with a driving motor and a transmission assembly, and the driving motor is connected to the other end of the fixing rod through the transmission assembly, so as to control the rotation angle of the fixing rod and the U-shaped connecting arm.

8. A throttle calibration device for a UAV aero-engine according to claim 7, characterized in that: The measurement and calibration module also includes a control rod, which is arranged parallel to the axial guide groove of the shell, one end of which passes through the threaded hole of the shell and is rotatably connected to the guide block for installing the angle sensor, and the other end is located on the outside of the shell; the rod part of the control rod is provided with an external thread, which cooperates with the threaded hole of the shell, and the axial displacement of the control rod is achieved by screwing, and the guide block for installing the angle sensor is further controlled to move along the axial guide groove, thereby completing the control of the axial position of the angle transfer module.

9. A passive measurement method for a throttle calibration device for a UAV aero-engine as claimed in claim 8, characterized in that The specific steps are as follows: The throttle calibration device for the UAV aviation engine is clamped and installed at the pipe opening of the throttle intake pipe through a three-claw locking mechanism; The axial position of the angle transmission module is adjusted by rotating the control rod so that the free end of the angle transmission module contacts the throttle plate, and the rotation angle of the throttle plate is obtained by the adaptive deformation of the connecting rod structure; The rotation angle is transmitted to the angle sensor through the fixed rod, that is, the rotation angle of the throttle plate is measured; Repeat the above steps to measure different throttle angles; When the measurement is completely finished, rotate the control lever in the opposite direction to push the angle transmission module away from the throttle plate, release the claw lock, and end the measurement.

10. An active calibration method for a throttle calibration device for a UAV aero-engine according to claim 8, characterized in that The specific steps are as follows: The throttle calibration device for the UAV aviation engine is clamped and installed at the pipe opening of the throttle intake pipe through a three-claw locking mechanism; The angle transfer module is turned to a preset angle by controlling the drive motor and the angle sensor, and the drive motor is kept locked; Release the electronic throttle control to keep the electronic throttle in a free state; The axial position of the angle transmission module is adjusted by rotating the control rod so that the free end of the angle transmission module contacts the throttle plate, and the rotation angle of the throttle plate is adjusted, that is, the active control and calibration of the throttle angle is completed; Repeat the above steps to adjust different calibration angles; When the measurement is completely completed, rotate the control lever in the opposite direction, push the angle transfer module away from the throttle plate, release the claw lock, and end the calibration.

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