Dynamic calibration device for large-angle sensor

Abstract

The utility model discloses a dynamic calibration device for a large-angle sensor, which relates to the technical field of automobile electronic manufacturing and processing and comprises a mounting fixture, an electric recirculating ball steering gear subassembly is arranged at the upper part of the mounting fixture, and an input module is arranged at the top of the electric recirculating ball steering gear subassembly. An output module is arranged at the end of the electric recirculating ball steering gear sub-assembly, and the electric recirculating ball steering gear sub-assembly, the input module and the output module are jointly connected with an industrial personal computer. According to the utility model, the input module, the output module and the industrial personal computer are integrated together to form a complete calibration testboard, so that the operation is convenient, the stability and reliability of the equipment are improved, the calibration time is greatly shortened by the automatic calibration process, the production efficiency is improved, and meanwhile, the high-precision sensor is matched with the industrial personal computer, so that the production efficiency is improved. The accuracy and the reliability of the calibration result are ensured, and powerful guarantee is provided for the control performance and the safety of the commercial vehicle.

Description

Technical Field

[0001] This utility model relates to the field of automotive electronics manufacturing and processing technology, and in particular to a dynamic calibration device for a large-angle sensor. Background Technology

[0002] In the commercial vehicle sector, the accuracy of large-angle sensors is crucial for vehicle handling performance and safety. However, traditional sensor calibration methods have many shortcomings.

[0003] Traditional calibration typically relies on manual operation, which is inefficient and difficult to guarantee accuracy. Manual calibration requires measuring and adjusting multiple parameters one by one, a tedious and time-consuming process. Furthermore, human error can easily occur, leading to inaccurate calibration results.

[0004] Furthermore, existing calibration equipment has limited functionality and cannot meet the complex calibration requirements of large-angle sensors in commercial vehicles. Traditional equipment often only allows for the detection and adjustment of some sensor parameters, and has limited comprehensive calibration capabilities for multiple aspects such as input torque, angle, and output characteristics. Utility Model Content

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0006] A dynamic calibration device for a large-angle sensor includes a mounting fixture, an electric recirculating ball steering sub-assembly is mounted on the upper part of the mounting fixture, an input module is mounted on the top of the electric recirculating ball steering sub-assembly, an output module is mounted on the end of the electric recirculating ball steering sub-assembly, and the electric recirculating ball steering sub-assembly, the input module and the output module are connected to an industrial control computer.

[0007] More preferably, the input module includes:

[0008] The input shaft is located at the top of the electric recirculating ball steering sub-assembly.

[0009] The input drive connector is connected to the power output end of the input shaft.

[0010] The servo motor has an input drive rod installed at its power output end, and the end of the input drive rod is installed on the input drive connector.

[0011] More preferably, the input module further includes:

[0012] The clutch is located between the servo motor and the input drive lever.

[0013] The input sensor is mounted on the input drive rod.

[0014] A further preferred embodiment is that the input shaft is provided with an external spline, and the power output end of the external electric cylinder is snapped onto the external spline.

[0015] More preferably, the frictional force between the servo motor and the clutch is <0.1 N / m.

[0016] More preferably, the output module includes:

[0017] The output drive connector is connected to the end of the electric recirculating ball steering sub-assembly.

[0018] The output motor has an output drive rod installed at its power output end, and the end of the output drive rod is installed on the output drive connector.

[0019] The output sensor is mounted on the output drive rod.

[0020] More preferably, the output drive connector transmission ratio i, the rotation angle ±360 / i, and the reading ±360°.

[0021] A further preferred embodiment is that the electric recirculating ball steering sub-assembly is internally equipped with a worm gear, a ball screw, and a gear rack.

[0022] Compared with existing technologies, this utility model has the following advantages: By integrating the input module, output module, and industrial control computer together, a complete calibration test bench is formed, which not only facilitates operation but also improves the stability and reliability of the equipment. The automated calibration process greatly shortens the calibration time and improves production efficiency. At the same time, the cooperation between the high-precision sensor and the industrial control computer ensures the accuracy and reliability of the calibration results, providing a strong guarantee for the handling performance and safety of commercial vehicles. This calibration method is applicable to large-angle sensors of different models of commercial vehicles and has strong versatility and adaptability. Furthermore, by adjusting the parameters of the input module and output module, the calibration requirements of different sensors can be met. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this embodiment;

[0024] Reference numerals: 1. Mounting fixture; 2. Electric recirculating ball steering sub-assembly; 3. Input module; 31. Input shaft; 32. Input drive connector; 33. Servo motor; 34. Input drive rod; 35. Clutch; 36. Input sensor; 4. Output module; 41. Output drive connector; 42. Output motor; 43. Output drive rod; 44. Output sensor; 5. Industrial computer. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1 This utility model will be described in further detail.

[0026] A dynamic calibration device for a large-angle sensor, such as Figure 1 As shown, the assembly includes a mounting fixture 1, on which an electric recirculating ball steering sub-assembly 2 is mounted. An input module 3 is splinedly connected to the top of the electric recirculating ball steering sub-assembly 2. An output module 4 is provided at the end of the electric recirculating ball steering sub-assembly 2. The electric recirculating ball steering sub-assembly 2, the input module 3, and the output module 4 are all connected to an industrial control computer 5. Furthermore, the input module 3, the output module 4, and the industrial control computer 5 together form a steering gear assembly calibration test bench. Even further, the output module 4 can realize drive and has a built-in locking mechanical structure to realize the output locking function.

[0027] By integrating input module 3, output module 4, and industrial control computer 5, a complete calibration test bench is formed. This not only facilitates operation but also improves the stability and reliability of the equipment. The automated calibration process significantly shortens calibration time and improves production efficiency. At the same time, the cooperation between the sensor and the industrial control computer ensures the accuracy and reliability of the calibration results, providing strong support for the handling performance and safety of commercial vehicles. This calibration method is applicable to large-angle sensors of different models of commercial vehicles, exhibiting strong versatility and adaptability. Furthermore, by adjusting the parameters of input module 3 and output module 4, the calibration requirements of different sensors can be met, providing commercial vehicle manufacturers with an efficient and reliable calibration solution.

[0028] Specifically, input module 3 includes:

[0029] Input shaft 31 is located on top of electric recirculating ball steering sub-assembly 2.

[0030] Input drive connector 32 is connected to the power output end of input shaft 31.

[0031] The servo motor 33 has an input drive rod 34 installed at its power output end, and the end of the input drive rod 34 is installed on the input drive connector 32.

[0032] Furthermore, rotation is achieved via a servo motor; the output module is driven by a cylinder to achieve front-to-back docking. This layout further facilitates efficient power input. In the overall structural design of the device, the top position is relatively independent, reducing spatial interference with other components. This makes the power transmission from the input drive connector 32 to the input shaft 31 smoother, ensuring accurate and efficient power transmission from the servo motor 33 to the electric recirculating ball steering sub-assembly 2, reducing energy loss during power transmission. The input drive rod 34 is installed at the power output end of the servo motor 33 and then connected to the input drive connector 32, enabling precise control of the input power. In the calibration of large-angle sensors or the operation of the steering gear in commercial vehicles, precise power input is crucial for ensuring the accuracy and stability of the system.

[0033] Specifically, input module 3 also includes:

[0034] Clutch 35 is located between servo motor 33 and input drive rod 34.

[0035] The input sensor 36 is mounted on the input drive rod 34.

[0036] Specifically, the input shaft 31 is provided with an external spline, and the power output end of the external electric cylinder is snapped onto the external spline. Furthermore, the input module 3 can be connected to the cylinder via a slider to achieve up and down movement.

[0037] Specifically, the friction between the servo motor 33 and the clutch 35 is <0.1N / m. Furthermore, the energy consumed by the servo motor 33 to overcome friction during operation is very small. Moreover, in practical applications, especially for equipment that needs to work for a long time, the low friction means that the servo motor 33 does not need to output too much extra energy to overcome frictional resistance, which helps to improve energy utilization efficiency, reduce energy waste, and thus reduce the operating cost of the equipment.

[0038] Specifically, output module 4 includes:

[0039] Output drive connector 41 is connected to the end of electric recirculating ball steering sub-assembly 2.

[0040] The output motor 42 has an output drive rod 43 installed at its power output end, and the end of the output drive rod 43 is installed on the output drive connector 41.

[0041] The output sensor 44 is mounted on the output drive rod 43.

[0042] Specifically, the output drive connector 41 has a transmission ratio i, a rotation angle of ±360 / i, and a reading range of ±360°. Furthermore, by setting the transmission ratio i and being able to read the rotation angle range of ±360°, it means that a complete circumferential angle measurement can be performed on the output drive connector 41. In the calibration or practical application of the output sensor 44, this can fully cover all angular states that the output drive connector 41 may exhibit, thereby ensuring that the output sensor 44 can be accurately calibrated at any possible working angle, thus improving the accuracy and reliability of the sensor.

[0043] Specifically, the electric recirculating ball steering sub-assembly 2 is internally equipped with a worm gear, a ball screw, and a gear rack.

[0044] The specific calibration steps for this device during dynamic calibration, using input sensor 36 and output sensor 44, are as follows:

[0045] S1: Fix the electric recirculating ball steering sub-assembly 2 onto the mounting fixture 1, and install the rotor and stator of the input sensor 36.

[0046] S2: Connect the wiring harness of the industrial computer 5 and the input sensor 36.

[0047] S3: Calibrate and optimize servo motor 33 under non-torsional conditions.

[0048] S3.1: Drive servo motor 33 to rotate drive rod 34 360° in the forward direction under non-torsional conditions. Measure input sensor 36 outputs XY coordinates of each signal with 360 values ​​at a frequency of 1 point per degree.

[0049] Specifically, based on the rotational speed VRipple, max = 360° / s, the number of signal points can be adjusted and read as {X[]P1-, Y[]P1-}, {X[]T1-, Y[]T1-}, {X[]T2-, Y[]T2-}, {X[]MLX-, Y[]MLX-}, and saved in an array. The above are the XY values ​​of the P1 signal detected by the device, where X represents the angle and Y represents the duty cycle at the current angle.

[0050] S3.2: Drive the servo motor 33 to rotate the drive rod 34 360° back to the starting position under non-torsional conditions, measure the output of the input sensor 36, and record the XY coordinates of each signal 360 values ​​at a frequency of 1 point per degree.

[0051] Furthermore, {X[]P1-, Y[]P1-}, {X[]T1-, Y[]T1-}, {X[]T2-, Y[]T2-}, {X[]MLX-, Y[]MLX-} are stored in an array.

[0052] S4: Optimization of signal upper and lower limits, hysteresis and stiffness coefficient of drive rod 34 under torsional conditions.

[0053] S5: Repeat the torque curve measurement under the torsional condition in S3 to check whether each indicator is qualified. If it is not qualified, repeat the test. If it is qualified, proceed to S6.

[0054] S6: Check parameters, prepare for programming, and perform a performance check after programming is complete.

[0055] In step S3, the driving method is changed from the traditional drive input shaft to the drive output shaft. The input shaft end is connected to the device input shaft, and at the same time, the device input end clutch is engaged, so that the input shaft drive end is disengaged from the input servo motor. At this time, the friction between the input end and the clutch is <0.1Nm, and the input shaft end is equivalent to being in a state without any load, and the torsion bar deformation can be ignored. In the data acquisition program, the product transmission ratio i and the output rotation angle ±360 / i are entered to achieve ±360° reading at the input end. It can read {X[]P1+,Y[]P1+},{X[]T1+,Y[]T1+},{X[]T2+,Y[]T2+},{X[]MLX+,Y[]MLX+},{X[]P1-,Y[]P1-},{X[]T1-,Y[]T1-},{X[]T2-,Y[]T2-},{X[]MLX+,Y[]MLX+}. The sensor is optimized to ensure that the sensor point is symmetrical within ±360°.

[0056] Through the above steps, when this device is in use, the input module 3, the output module 4, and the industrial control computer 5 are integrated together to form a complete calibration test bench, thereby improving the response speed and accuracy of the device and further reducing the energy consumption of the device.

[0057] This specific embodiment is merely an explanation of the utility model and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of protection of this utility model.

Claims

1. A large angle sensor dynamic calibration apparatus, characterized by, Including installation clamp (1), the upper portion of installation clamp (1) is provided with electric circulating ball steering gear subassembly (2), the top of electric circulating ball steering gear subassembly (2) is provided with input module (3), the end of electric circulating ball steering gear subassembly (2) is provided with output module (4), electric circulating ball steering gear subassembly (2), input module (3) and output module (4) are connected with industrial computer (5) together.

2. The apparatus for dynamic calibration of a large angle sensor according to claim 1, wherein, The input module (3) comprises: An input shaft (31) is arranged at the top of the electric circulating ball steering gear subassembly (2); An input drive joint (32) is connected to the power output end of the input shaft (31); A servo motor (33) is provided, and an input drive rod (34) is mounted on the power output end of the servo motor (33), and the end of the input drive rod (34) is mounted on the input drive joint (32).

3. The apparatus of claim 2, wherein, The input module (3) further comprises: A clutch (35) is arranged between the servo motor (33) and the input drive rod (34); An input sensor (36) is mounted on the input drive rod (34).

4. The apparatus of claim 2, wherein, The input shaft (31) is provided with an external spline, and the power output end of an external electric cylinder is clamped on the external spline.

5. The apparatus of claim 3, wherein, The friction between the servo motor (33) and the clutch (35) is less than 0.1 N / m.

6. The apparatus of claim 2, wherein The output module (4) comprises: An output drive joint (41) is connected to the end of the electric circulating ball steering gear subassembly (2); An output motor (42) is provided, and an output drive rod (43) is mounted on the power output end of the output motor (42), and the end of the output drive rod (43) is mounted on the output drive joint (41); An output sensor (44) is arranged on the output drive rod (43).

7. A large angle sensor dynamic calibration device according to claim 6, characterized in that The output drive joint (41) has a transmission ratio i, a rotation angle of ±360 / i, and a reading of ±360°.

8. The apparatus of claim 1, wherein, The electric circulating ball steering gear subassembly (2) is internally provided with a worm gear, a ball screw and a gear rack.

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