A power steering column with intermediate shaft function testing device and method

Abstract

The application relates to high-end equipment manufacturing, in particular to a power steering column with a middle shaft function test equipment and method. The test equipment comprises a rack, a rear section detection device, a product fixing device, an input force detection device, a mode switching device and a control box are arranged on the rack, and the mode switching device is provided with automatic and manual test devices. Each device has an adjustable height and angle structure, which can accurately dock different specifications of workpieces to be tested, and improve the compatibility and adaptability of the equipment. The test method combines automatic calibration program, wavelet denoising algorithm, compensation coefficient matrix establishment and LSTM neural network model, considers the influence of environmental factors and friction torque, realizes dynamic and accurate control of torque output, improves the accuracy, reliability and adaptability of the test result. The equipment can also quickly switch the test mode, is simple and safe to operate, and provides strong support for performance evaluation and product quality control of the power steering column with a middle shaft.

Description

Technical Field

[0001] This application relates to high-end equipment manufacturing, and in particular to a power steering column with intermediate shaft function testing equipment and method. Background Technology

[0002] In the automotive industry, with the continuous pursuit of vehicle safety and comfort, power steering systems have become an indispensable part of modern automobiles. As a key component, the steering column, along with its central shaft, directly affects the driving experience and road safety. Therefore, strict quality control during the manufacturing process is crucial. In recent years, to meet diverse market demands and improve product quality, more advanced equipment and technologies have been gradually introduced for functional testing of these components, propelling the entire industry's technological level to new heights.

[0003] Against this backdrop, the industry typically employs various methods for functional testing of similar components. For example, fixed fixtures combined with manual operation are used to measure basic parameters; or early versions of semi-automated devices are used to conduct stress loading tests under specific conditions. In some cases, simple robotic arms are used to simulate actual working conditions to evaluate overall performance. While these methods each have their own focus and can cover a certain range of application scenarios, they generally lack flexibility and versatility in their design.

[0004] However, existing functional testing equipment has a significant shortcoming: it cannot effectively support simultaneous, accurate, and efficient testing of products with multiple specifications. This limitation not only restricts companies' ability to quickly respond to changes in market demand but also increases additional costs. It exhibits particularly significant adaptability issues when facing requirements for different sizes and shapes, urgently requiring a new approach to overcome this bottleneck.

[0005] Therefore, based on the above problems, the existing technology needs to be improved. Summary of the Invention

[0006] The purpose of this application is to provide a testing device for the function of a power steering column with an intermediate shaft.

[0007] The above-mentioned technical objective of this application is achieved through the following technical solution: a power steering column with intermediate shaft function testing equipment, comprising a frame, on which a rear-end testing device, a product fixing device, an input force detection device, and a mode switching device are sequentially arranged. The mode switching device is equipped with an automatic testing device and a manual testing device. The automatic testing device or the manual testing device is driven by the mode switching device to be set to correspond to the input force detection device. The frame is also equipped with a control box for coordinating the actions of each device and processing the test data. The product fixing device is used to fix the workpiece to be tested. The input force detection device fixes one end of the workpiece to be tested. The automatic testing device drives the input force detection device to apply a preset torque to the workpiece to be tested and transmits the detection signal to the control box in real time. The rear-end testing device is connected to the other end of the workpiece to be tested away from the input force detection device and is used to monitor the output torque fluctuation rate and transmission efficiency of the workpiece to be tested under torque input.

[0008] By adopting the above technical solution, on the one hand, the frame serves as the load-bearing foundation, with a reasonable layout of various devices. The downstream testing device can accurately monitor key performance indicators of the workpiece under test, such as output torque fluctuation rate and transmission efficiency, under torque input, providing accurate data for product performance evaluation. The product fixing device ensures stable installation of the workpiece under test, avoiding test displacement errors. On the other hand, the input force detection device, combined with automatic or manual testing devices, can flexibly switch testing modes according to needs. It can efficiently and accurately drive the preset input torque using automatic testing devices, while also meeting special working conditions or debugging requirements during manual testing. Moreover, the detection signal is transmitted to the control box in real time, facilitating timely data processing. Furthermore, the mode switching device greatly enhances the equipment's versatility and adaptability, enabling it to be compatible with power steering columns with intermediate shafts of different specifications and testing requirements. This effectively solves the problem that existing technologies cannot handle accurate and efficient testing of multi-specification products, helping enterprises reduce costs and respond quickly to market changes.

[0009] Optionally, the mode switching device includes a slide rail mounted on the frame, a slider mounted on the slide rail, a moving platform mounted on the slider, an automatic testing device and a manual testing device mounted on the moving platform, and a mode switching drive connected to the moving platform. The automatic testing device or the manual testing device is set to correspond to the input force detection device by the mode switching drive.

[0010] By adopting the above technical solution, the cooperation between the slide rail and the slider provides stable and precise guidance for the moving platform, ensuring that the automatic testing device and the manual testing device can move smoothly along the predetermined trajectory during the switching process, avoiding instability such as deviation and shaking, thereby ensuring the accuracy and reliability of the test. Secondly, by integrating the automatic and manual testing devices onto the moving platform and driving them with a mode-switching drive, rapid and convenient switching between the two testing modes is achieved, greatly improving the flexibility of the testing process. When automated batch testing is required, the automatic testing device can be quickly aligned with the input force detection device, fully leveraging its high efficiency and accuracy; while when encountering situations requiring fine manual adjustment or verification under special working conditions, it can be immediately switched to the manual testing device to meet diverse testing needs. This flexible switching mechanism effectively saves testing time, optimizes the overall efficiency of the equipment, and further enhances the adaptability of the power steering column with intermediate shaft function testing equipment to complex and changing testing scenarios.

[0011] Optionally, the automatic testing device includes a first fixed base, on which a first lifting drive component is provided, and on which a first lifting seat is provided, wherein the first lifting drive component drives the first lifting seat to move up and down relative to the first fixed base; the first lifting seat is provided with a first rotating shaft, on which a first angle rotation platform is provided, and the first rotating shaft is connected to a first angle adjustment drive component, wherein the first angle adjustment drive component drives the first angle rotation platform to adjust the angle relative to the first lifting seat; the first angle rotation platform is provided with a first power output unit consisting of a first drive motor and a first reduction gear, and a first transmission shaft connected to the first power output unit.

[0012] By adopting the above technical solutions, in terms of position adjustment, the first lifting drive component drives the first lifting seat to move up and down relative to the first fixed seat, which can flexibly adjust the vertical height of the automatic testing device to adapt to workpieces of different heights and specifications, enhancing the equipment's compatibility with various products. The first angle adjustment drive component drives the first angle rotation platform to adjust its angle relative to the first lifting seat, allowing the first drive shaft to be in different angular positions, meeting the testing requirements for applying torque to the workpiece under different angle conditions, and improving the comprehensiveness and accuracy of the test. In terms of power output, the first power output unit, composed of the first drive motor and the first reduction mechanism, can provide stable and adjustable power to the first drive shaft, ensuring that the preset torque can be accurately applied to the workpiece under test. At the same time, the first reduction mechanism can reasonably adjust the output speed and torque according to the test requirements, further improving the controllability and accuracy of the testing process. In summary, the design of this automatic testing device greatly enhances the flexibility, versatility, and testing accuracy of the power steering column with intermediate shaft function testing equipment.

[0013] Optionally, the first angle rotation platform is provided with a front-to-back adjustment component, and the first power output unit is located on the front-to-back adjustment component. The front-to-back adjustment component drives the first transmission axis to move closer to or away from the input force detection device, thereby automatically completing the connection or separation with the input force detection device.

[0014] By adopting the above technical solution, in terms of operational convenience, the front and rear adjustment components drive the first drive shaft to move closer to or further away from the input force detection device, automatically completing the connection or separation. This greatly simplifies the equipment assembly process, eliminating the need for manual and laborious connection of the drive shaft, saving preparation time before testing, and improving testing efficiency. Considering the accuracy and stability of the test, the automatic connection process ensures precise alignment between the first drive shaft and the second drive shaft of the input force detection device, reducing deviations that may occur due to manual connection, ensuring stable and efficient torque transmission, and improving the accuracy of test data. Furthermore, this automatic connection and separation design avoids the risk of misoperation that may arise from manual operation, enhancing the safety and reliability of equipment operation. Moreover, this design further enhances the automation level of the equipment, making it more suitable for the intelligent and efficient production needs of modern high-end equipment manufacturing, and providing strong support for the upgrading and development of steering column with intermediate shaft functional testing equipment.

[0015] Optionally, the input force detection device includes a second fixed base, on which a second lifting drive component is provided, and on which a second lifting seat is provided. The second lifting drive component drives the second lifting seat to move up and down relative to the second fixed base. The second lifting seat is provided with a second rotating shaft, on which a second angle rotation platform is provided. The second rotating shaft is connected to a second angle adjustment drive component, which drives the second angle rotation platform to adjust its angle relative to the second lifting seat. The second angle rotation platform is provided with a plurality of first mounting seats, on which a second transmission shaft is rotatably mounted. One end of the second transmission shaft is connected to the workpiece to be tested, and the other end is connected to the automatic testing device.

[0016] By adopting the above technical solution, the second lifting drive component drives the second lifting seat to rise and fall, and in conjunction with the second angle adjustment drive component, drives the second angle rotation platform to rotate. The two work together, allowing the second drive shaft to flexibly adjust its position and angle in three-dimensional space. Regardless of changes in the specifications, shape, or installation posture of the workpiece under test, precise alignment is possible, greatly expanding the range of products the equipment can test and effectively solving the problem of adapting to multiple product specifications. In terms of force transmission and detection, one end of the second drive shaft is stably connected to the workpiece under test, while the other end is connected to the automatic testing device, ensuring stable and efficient torque transmission and providing a guarantee for subsequent accurate measurement of input force. Simultaneously, multiple first mounting seats not only provide reliable support for the second drive shaft but also allow for parallel operation or backup switching of multiple drive shafts when necessary, further improving the reliability and fault tolerance of the equipment and comprehensively optimizing the accuracy, versatility, and stability of the power steering column with intermediate shaft function test.

[0017] Optionally, a rotating wheel is provided at the end of the second drive shaft away from the product fixing device.

[0018] By adopting the above technical solution, the rotating wheel provides operators with an intuitive and convenient operating point in manual testing mode. Operators can easily apply torque to the second drive shaft simply by rotating the wheel. Compared to directly manipulating the drive shaft, this operation is more labor-saving and precise, effectively improving the convenience and operability of manual testing. Secondly, in terms of visual monitoring, the rotation status of the wheel can intuitively reflect the rotation of the drive shaft, allowing operators to observe the torque transmission process in real time, promptly detect abnormalities such as jamming or uneven speed, and then quickly make adjustments to ensure smooth testing. Furthermore, from the perspective of overall equipment compatibility, the addition of the rotating wheel does not change the core function of the original structure, but cleverly optimizes the manual operation process. This allows the testing equipment to maintain the efficiency of automated testing while further improving the practicality of the manual testing mode, better meeting the needs of different testing scenarios and operators, and enhancing the overall performance of the power steering column with intermediate shaft function testing equipment.

[0019] Optionally, the product fixing device includes a third fixing seat, a third lifting drive component on the third fixing seat, a third lifting seat on the third lifting drive component, and the third lifting seat being driven to move up and down relative to the third fixing seat by the third lifting drive component; the third lifting seat is provided with a third rotating shaft, a third angle rotation platform is provided on the third rotating shaft, the third rotating shaft is connected to a third angle adjustment drive component, and the third angle adjustment drive component is driven to adjust the angle of the third angle rotation platform relative to the third lifting seat; the third angle rotation platform is provided with a second mounting seat for fixing and mounting the workpiece to be tested.

[0020] By adopting the above technical solution, the combination of the third lifting drive component and the third lifting seat can precisely adjust the vertical position of the fixing device according to the height difference of the workpiece under test, ensuring perfect fit with the bottom of products of different specifications and avoiding installation difficulties or testing errors caused by height mismatch. Simultaneously, the third angle adjustment drive component drives the third angle rotation platform to rotate, and in conjunction with the setting of the third rotating shaft, allows the workpiece under test fixed on the second mounting seat to achieve multi-angle adjustment in the horizontal direction, meeting various special installation angle requirements and greatly expanding the range of product types compatible with the equipment. On the other hand, from the perspective of testing stability, this multi-dimensional adjustment function can adjust the workpiece under test to the optimal stress state when fixing it, ensuring that the workpiece under test remains stable during subsequent input force detection, torque loading, and other testing stages, without displacement or shaking due to uneven force. This provides a solid foundation for accurate testing and comprehensively improves the versatility, adaptability, and accuracy of test results of the power steering column with intermediate shaft function testing equipment.

[0021] Optionally, the downstream detection device includes a fourth fixed base, a fourth rotating shaft on the fourth fixed base, a fourth angle rotation platform on the fourth rotating shaft, and a fourth angle adjustment drive connected to the fourth rotating shaft. The fourth angle adjustment drive drives the fourth angle rotation platform to adjust its angle relative to the fourth fixed base. The fourth angle rotation platform is provided with a second power output unit consisting of a second drive motor and a second reduction gear, and a third transmission shaft connected to the second power output unit.

[0022] By adopting the above technical solution, the fourth angle adjustment drive unit drives the fourth angle rotation platform to adjust its angle relative to the fourth fixed seat, enabling the third transmission shaft to flexibly adjust its angle to adapt to the installation angle and testing requirements of different workpieces under test, greatly improving the compatibility and adaptability of the downstream testing device to various product specifications. Secondly, the second power output unit, composed of the second drive motor and the second reduction mechanism, provides stable and adjustable power to the third transmission shaft, enabling precise application of appropriate loads to the workpiece under test. This allows for more accurate monitoring of the output torque fluctuation rate and transmission efficiency of the workpiece under test under torque input, improving the accuracy and reliability of the testing results. Furthermore, this structural design allows the downstream testing device to better simulate actual working conditions during testing, providing more realistic and effective data support for the performance evaluation of the power steering column with intermediate shaft. This helps to identify potential problems and make targeted improvements, enhancing the overall testing equipment's ability to control product quality.

[0023] The second objective of this application is to provide a test method for the function of a power steering column with an intermediate shaft.

[0024] A method for testing the function of a power steering column with intermediate shaft, using the aforementioned power steering column with intermediate shaft function testing equipment, includes the following steps:

[0025] Start the automatic calibration program of the control box;

[0026] The sensors installed in the input force detection device and the downstream detection device collect ambient temperature and humidity data.

[0027] Wavelet denoising algorithm is used to preprocess the raw sensor data to eliminate sensor baseline offset;

[0028] A temperature-humidity compensation coefficient matrix is ​​established based on historical calibration data and stored in the non-volatile memory of the control box;

[0029] A preset torque is applied by driving the second and third drive shafts;

[0030] Real-time acquisition of frictional torque data for the second and third drive shafts;

[0031] The friction torque variation trend with temperature is analyzed based on the LSTM neural network model, and compensation parameters are dynamically generated.

[0032] The compensation parameters are sent to the first drive motor and the second drive motor to correct the torque output command.

[0033] By adopting the above technical solutions, the automatic calibration program of the control box can eliminate initial equipment errors and ensure the foundation of test accuracy. Collecting ambient temperature and humidity data and preprocessing it using wavelet denoising algorithms effectively removes noise from the original sensor data, improving data quality. Establishing a temperature-humidity compensation coefficient matrix based on historical calibration data fully considers the impact of environmental factors on test results and can correct deviations caused by environmental factors in real time. Applying preset torque to the second and third drive shafts and collecting their friction torque data in real time provides crucial data for subsequent analysis. Using an LSTM neural network model to analyze the trend of friction torque with temperature change and dynamically generate compensation parameters, the complex relationship between the two can be accurately grasped. These compensation parameters are then sent to the first and second drive motors to correct torque output commands, achieving dynamic and precise control of torque output during the test. This makes the test closer to actual working conditions, greatly improving the accuracy, reliability, and adaptability of the test results, and providing a more scientific and effective basis for the performance evaluation of the power steering column with intermediate shaft.

[0034] Optionally, the following steps may also be included:

[0035] The relevant parameters of the workpiece to be tested are input through the human-machine interface of the control box;

[0036] The system automatically calls up the pre-stored three-dimensional adjustment model to calculate the required height adjustment of the first, second, and third lifting seats, as well as the angle compensation values ​​of the first, second, third, and fourth rotating axes.

[0037] Height adjustment is performed by the first lifting drive, the second lifting drive, and the third lifting drive corresponding to the height adjustment amount;

[0038] Angle adjustment is performed by using the corresponding angle compensation values ​​of the first angle adjustment drive, the second angle adjustment drive, the third angle adjustment drive, and the fourth angle adjustment drive.

[0039] By adopting the above technical solution, operators can conveniently input relevant parameters of the workpiece under test through the human-machine interface of the control box. The operation is simple and intuitive, reducing the professional skill requirements for operators. Secondly, the system automatically calls the pre-stored three-dimensional adjustment model, which can quickly and accurately calculate the required height adjustment of the first, second, and third lifting seats, as well as the angle compensation values ​​of the first, second, third, and fourth rotating shafts. This avoids the errors and time-consuming problems that may occur with manual calculation, improving the efficiency of the test preparation stage. Furthermore, the first, second, and third lifting drive components perform height adjustment according to the calculated height adjustment amount, and the first, second, third, and fourth angle adjustment drive components perform angle adjustment according to the corresponding angle compensation values. This allows the equipment to automatically and accurately adjust the height and angle of each device to adapt to the testing needs of workpieces of different specifications and shapes, greatly enhancing the versatility and compatibility of the testing equipment. It also ensures precise docking between each device and the workpiece under test during the testing process, further improving the accuracy and reliability of the test results.

[0040] In summary, this application has at least the following beneficial effect:

[0041] 1. Each device in the testing equipment, such as the automatic testing device, input force detection device, product fixing device, and rear detection device, is equipped with an adjustable height and angle structure. Through corresponding driving components and adjustment parts, the position and angle of each device can be flexibly adjusted according to the needs of different specifications of the workpiece to be tested, accurately aligning with the workpiece to be tested. This greatly enhances the compatibility and adaptability of the equipment to a variety of products and effectively solves the problem that existing technologies cannot handle the accurate and efficient testing of multiple specifications of products.

[0042] 2. The testing method comprehensively utilizes advanced technologies such as automatic calibration procedures, wavelet noise reduction algorithms, the establishment of temperature-humidity compensation coefficient matrices, and LSTM neural network models to fully process and analyze test data. It fully considers the influence of environmental factors and friction torque on test results, achieving dynamic and precise control of torque output. This improves the accuracy, reliability, and adaptability of test results, while also making the testing process intelligent, providing valuable reference for product performance evaluation and improvement.

[0043] 3. The mode switching device is equipped with both automatic and manual testing modes. The mode switching drive allows for quick and convenient switching between the two modes. The automatic testing device efficiently and accurately completes batch testing tasks, while the manual testing device can meet special working conditions or debugging needs. This flexible selection of testing modes improves testing efficiency, satisfies diverse testing scenarios, and enhances the overall efficiency and practicality of the equipment.

[0044] 4. The second mounting base of the product fixing device can stably fix the workpiece to be tested. The rotating wheel at one end of the second drive shaft of the input force detection device provides a convenient operating point for manual testing. Moreover, the adjustment of each device can be automatically completed by inputting parameters through the human-machine interface of the control box, reducing the difficulty of operation. At the same time, safety protection mechanisms, safety limits, operation specification prompts, real-time monitoring and emergency stop measures are set up during manual rotation testing to ensure the safety of operators and the smooth progress of testing. Attached Figure Description

[0045] Figure 1 This is a structural schematic diagram of a power steering column with intermediate shaft function testing equipment;

[0046] Figure 2 This is a schematic diagram of the mode switching device;

[0047] Figure 3 This is a schematic diagram of the automatic testing device;

[0048] Figure 4 This is a schematic diagram of the input force detection device;

[0049] Figure 5 This is a structural diagram of the product fixing device;

[0050] Figure 6 This is a schematic diagram of the downstream testing device;

[0051] Figure 7 This is a schematic diagram of the structure of the manual testing device;

[0052] Figure 8 This is a flowchart of the basic steps of the power steering column with intermediate shaft function test method;

[0053] Figure 9 This is a flowchart of the test method for the power steering column with intermediate shaft function based on the workpiece adaptation and adjustment steps.

[0054] Figure Labels

[0055] 1. Frame; 2. Rear inspection device; 21. Fourth fixed base; 22. Fourth rotating shaft; 23. Fourth angle rotation platform; 24. Fourth angle adjustment drive; 25. Second power output unit; 26. Third transmission shaft; 3. Product fixing device; 31. Third fixed base; 32. Third lifting drive; 33. Third lifting seat; 34. Third rotating shaft; 35. Third angle rotation platform; 36. Third angle adjustment drive; 37. Second mounting base; 4. Input force detection device; 41. Second fixed base; 42. Second lifting drive; 43. Second lifting seat; 44. Second rotating shaft; 45. Second... 46. ​​Angle rotation platform; 47. Second angle adjustment drive; 48. First mounting base; 49. Second transmission shaft; 5. Rotating wheel; 60. Mode switching device; 51. Slide rail; 52. Slider; 53. Moving platform; 54. Mode switching drive; 61. Automatic testing device; 62. First fixed base; 63. First lifting drive; 64. First lifting base; 65. First rotating shaft; 66. First angle rotation platform; 67. First angle adjustment drive; 68. First transmission shaft; 69. Front and rear adjustment assembly; 7. Manual testing device; 8. Control box; 9. Workpiece to be tested. Detailed Implementation

[0056] The present application will be further described in detail below with reference to the accompanying drawings.

[0057] In this embodiment, refer to Figures 1-7 A power steering column with intermediate shaft function testing equipment includes a frame 1. The frame 1 is sequentially equipped with a rear-end testing device 2, a product fixing device 3, an input force detection device 4, and a mode switching device 5. The mode switching device 5 is equipped with an automatic testing device 6 and a manual testing device 7. The automatic testing device 6 or the manual testing device 7 is set to correspond to the input force detection device 4 via the mode switching device 5. A control box 8 is also provided on the frame 1 to coordinate the actions of each device and process the test data. The product fixing device 3 is used to fix the workpiece 9 to be tested. The input force detection device 4 fixes one end of the workpiece 9 to be tested. The automatic testing device 6 drives the input force detection device 4 to apply a preset torque to the workpiece 9 to be tested and transmits the detection signal to the control box 8 in real time. The rear-end testing device 2 is connected to the other end of the workpiece 9 to be tested away from the input force detection device 4, and is used to monitor the output torque fluctuation rate and transmission efficiency of the workpiece 9 under torque input.

[0058] Specifically, the frame 1, as the basic support structure of the entire testing equipment, is made of high-strength metal materials, such as high-quality carbon steel, and is manufactured through precision machining and welding processes to ensure sufficient strength and stability to withstand the weight of each device and the workpiece 9 under test, as well as various forces generated during the testing process.

[0059] Reference Figure 2 The mode switching device 5 includes a slide rail 51 mounted on the frame 1, comprising a slide rail 51, a slider 52, a moving platform 53, and a mode switching drive component 54. The slide rail 51 is a high-precision linear guide with a surface hardened and ground, resulting in high hardness and a smooth surface, effectively reducing friction during slider 52 movement and ensuring movement accuracy. Slider 52 and moving platform 53 are tightly connected by bolts, ensuring no relative displacement between them. The mode switching drive component 54 can be a lead screw device, allowing manual adjustment to switch between manual and automatic testing modes. A servo motor paired with a ball screw is preferred. The servo motor precisely controls the rotation angle and speed, while the ball screw converts the motor's rotational motion into linear motion of the moving platform 53, achieving precise switching between the automatic testing device 6 and the manual testing device 7. When automated batch testing is required, the mode switching driver 54 drives the moving platform 53, enabling the automatic testing device 6 to quickly and accurately correspond to the input force detection device 4; if special working conditions require manual debugging, the moving platform 53 can be driven again to switch to the manual testing device 7.

[0060] Reference Figure 3 The first fixed base 61 of the automatic testing device 6 is securely mounted on the frame 1. The automatic testing device 6 includes the first fixed base 61, the first lifting drive component 62, the first lifting seat 63, the first rotating shaft 64, the first angle rotation platform 65, the first angle adjustment drive component 66, the first power output unit 67, and the first transmission shaft 68. The first lifting drive component 62 adopts an electric lifting cylinder. The push rod of the electric lifting cylinder is connected to the first lifting seat 63. By controlling the extension and retraction of the electric lifting cylinder, the first lifting seat 63 can be smoothly raised and lowered with a lifting accuracy of ±0.1mm. The first angle adjustment drive component 66 can be a manual adjustment mechanism or a high-precision rotary motor. The motor shaft is connected to the first rotating shaft 64, driving the first angle rotation platform 65 to adjust the angle with an accuracy of ±0.5°. The first angle rotation platform 65 is equipped with a front-to-back adjustment assembly 69, and the first power output unit 67 is located on the front-to-back adjustment assembly 69. Driven by the front-to-back adjustment assembly 69, the first drive shaft 68 moves closer to or further away from the input force detection device 4, automatically connecting or disconnecting from the input force detection device 4. Only after the front-to-back adjustment assembly 69 drives the first drive shaft 68 to disconnect from the input force detection device 4 can the mode switching device 5 be activated. The first drive motor in the first power output unit 67 is a variable frequency motor, which can flexibly adjust its speed according to testing requirements. The first reducer is a planetary reducer, characterized by high transmission efficiency, high precision, and large torque. It can amplify the output torque of the first drive motor and accurately transmit it to the first drive shaft 68, ensuring a stable and precise preset torque is applied to the workpiece 9 under test.

[0061] Reference Figure 4The second fixed base 41 of the input force detection device 4 is also securely mounted on the frame 1. The input force detection device 4 includes the second fixed base 41, the second lifting drive component 42, the second lifting seat 43, the second rotating shaft 44, the second angle rotation platform 45, the second angle adjustment drive component 46, the first mounting base 47, the second transmission shaft 48, and the rotating wheel 49. The second fixed base 41 is fixed to the frame 1 with anchor bolts to ensure its secure installation. The second lifting drive component 42 also adopts an electric lifting screw module, similar to the first lifting drive component 62 of the automatic testing device 6, but the parameters of the stepper motor have been adjusted according to the installation position and load requirements of the input force detection device 4 to make its output torque more suitable for this device. The second lifting seat 43 moves up and down relative to the second fixed base 41 under the drive of the second lifting drive component 42. The second lifting seat 43 is provided with a second rotating shaft 44, which is mounted on the second lifting seat 43 through a deep groove ball bearing to ensure smooth rotation. The second angle rotation platform 45 is mounted on the second rotating shaft 44. The second angle adjustment drive 46 can be a manual adjustment mechanism or a stepper motor and gear transmission mechanism to achieve angle adjustment of the second angle rotation platform 45. The second angle adjustment drive 46 drives the second angle rotation platform 45 to adjust its angle relative to the second lifting seat 43. The second angle rotation platform 45 is provided with several first mounting seats 47. In this embodiment, three first mounting seats 47 are provided. The first mounting seats 47 are made of aluminum alloy and have undergone anodizing treatment to improve their corrosion resistance and surface hardness. A second drive shaft 48 is rotatably mounted on the first mounting seat 47. The second drive shaft 48 is made of alloy steel and has undergone heat treatment and surface quenching to improve its strength and wear resistance. One end of the second drive shaft 48 is connected to the workpiece 9 to be tested through a special clamp to ensure stable torque transmission; the other end is connected to the first drive shaft 68 of the automatic testing device 6 through a coupling. A rotating wheel 49 is provided at the end of the second drive shaft 48 furthest from the product fixing device 3. The rotating wheel 49 has a diameter of 200mm and a knurled surface to increase the friction between the operator's hand and the wheel, facilitating the application of torque during manual testing. An angle sensor is also installed on the rotating wheel 49 to monitor the rotation angle of the rotating wheel 49 in real time, providing data support for manual testing.

[0062] Reference Figure 5The third fixed seat 31 of the product fixing device 3 is installed at a suitable position on the frame 1. The product fixing device 3 includes the third fixed seat 31, the third lifting drive component 32, the third lifting seat 33, the third rotating shaft 34, the third angle rotation platform 35, the third angle adjustment drive component 36, and the second mounting seat 37. The third fixed seat 31 is installed on the frame 1 by welding and bolt connection to ensure its stability. The third lifting drive component 32 can be a hydraulic lifting cylinder. The cylinder diameter and piston rod diameter of the hydraulic lifting cylinder are designed according to the load requirements of the equipment. The hydraulic lifting cylinder is powered by a hydraulic pump station and the extension and retraction of the cylinder are controlled by an electromagnetic reversing valve to realize the lifting movement of the third lifting seat 33 relative to the third fixed seat 31. The lifting stroke of the third lifting seat 33 is controlled by feedback from a high-precision displacement sensor. The third lifting seat 33 is equipped with a third rotating shaft 34, which is mounted on the third lifting seat 33 by tapered roller bearings and can withstand large axial and radial loads. The third-angle rotating platform 35 is mounted on the third rotating shaft 34. The third-angle adjustment drive 36 can be a manual adjustment mechanism or an electric rotary table. The electric rotary table integrates a high-precision rotary encoder and a servo motor. The servo motor is connected to the rotary table through a precision reducer to achieve high-precision angle adjustment. The third-angle adjustment drive 36 drives the third-angle rotating platform 35 to adjust its angle relative to the third lifting seat 33. The third-angle rotating platform 35 is equipped with a second mounting seat 37. The second mounting seat 37 is designed with replaceable clamp modules according to the shape and size of the workpiece 9 to be measured. The clamp modules are connected to the second mounting seat 37 through positioning pins and bolts, making replacement convenient and quick. When fixing the workpiece 9 to be measured, first adjust the height of the third lifting seat 33 according to the height of the workpiece, then adjust the angle of the workpiece through the third-angle adjustment drive 36, and finally use clamps to firmly fix the workpiece.

[0063] Reference Figure 6The downstream detection device 2 includes a fourth fixed base 21, a fourth rotating shaft 22, a fourth angle rotation platform 23, a fourth angle adjustment drive 24, a first power output unit 67, and a third transmission shaft 26. The fourth fixed base 21 is fixed to the frame 1 with anchor bolts to ensure secure installation. The fourth rotating shaft 22 is mounted on the fourth fixed base 21 using self-aligning roller bearings, accommodating certain installation errors and shaft deformation. The fourth angle rotation platform 23 is mounted on the fourth rotating shaft 22. The fourth angle adjustment drive 24 can be a manual adjustment mechanism or an AC servo motor and synchronous belt drive mechanism. The AC servo motor features high speed and high precision, while the synchronous belt drive mechanism offers advantages such as smooth transmission, low noise, and accurate transmission ratio. The fourth angle adjustment drive 24 drives the fourth angle rotation platform 23 to adjust its angle relative to the fourth fixed base 21. The fourth angle rotation platform 23 is equipped with a second power output unit 25, consisting of a second drive motor and a second reducer, and a third transmission shaft 26 connected to the second power output unit 25. The second drive motor is a permanent magnet synchronous motor, and the second reducer is a harmonic reducer, which has advantages such as high transmission ratio, high precision, and small size. The second power output unit 25 provides stable and adjustable power to the third drive shaft 26, enabling precise application of a suitable load to the workpiece 9 under test, thereby more accurately monitoring the output torque fluctuation rate and transmission efficiency of the workpiece 9 under torque input. Torque sensors and speed sensors are installed on the third drive shaft 26, which can collect data accurately in real time and transmit it to the control box 8.

[0064] Reference Figure 8 A basic process for testing the function of a power steering column with intermediate shaft:

[0065] S101: Start the automatic calibration program of control box 8: The operator clicks the "Start Automatic Calibration" button on the human-machine interface of control box 8. Control box 8 sends calibration commands to the sensors, drive components, and detection units of each device. Torque sensors, speed sensors, temperature and humidity sensors, etc., begin zero-point calibration and full-scale calibration. For example, the torque sensor connects to a standard torque source, collects the output signal under standard torque, compares it with the theoretical value, calculates and stores the calibration coefficient. Each drive motor performs initial positioning, returning to the preset initial position, such as the first lifting seat 63 and first angle rotation platform 65 of the automatic testing device 6, and the second lifting seat 43 and second angle rotation platform 45 of the input force detection device 4, ensuring the equipment is in its initial standard state.

[0066] S102: Ambient temperature and humidity data are collected by sensors installed on the input force detection device 4 and the downstream detection device 2. The temperature and humidity sensors on the input force detection device 4 and the downstream detection device 2 are digital temperature and humidity sensors, characterized by high accuracy and fast response. The sensors transmit the collected ambient temperature and humidity data to the signal processing module of the control box 8 via an RS485 communication interface. After preprocessing the data such as filtering and amplification, the signal processing module transmits the data to the central processing unit of the control box 8 for storage and analysis. The temperature and humidity sensors have a measurement accuracy of ±0.5℃ for temperature and ±2%RH for humidity, accurately reflecting changes in the temperature and humidity of the test environment.

[0067] S103: Preprocessing raw sensor data using wavelet denoising algorithm to eliminate sensor baseline offset: Control box 8 uses wavelet denoising algorithm to preprocess raw sensor data. First, a suitable wavelet basis function (e.g., db4 wavelet) and decomposition level (e.g., 4 levels) are selected to perform wavelet decomposition on the temperature and humidity data, decomposing the data into approximate components and detail components at different scales. Then, thresholding is performed on the detail components to remove noise components. Finally, wavelet reconstruction is used to recombine the processed approximate components and detail components into denoised temperature and humidity data, eliminating sensor baseline offset, improving data quality, and providing an accurate data foundation for subsequent testing and analysis.

[0068] S104: Establish a temperature-humidity compensation coefficient matrix based on historical calibration data and store it in the non-volatile memory of control box 8: Control box 8 retrieves a large amount of historical calibration data from the database, which includes test data under different temperature and humidity conditions and the corresponding error values. Control box 8 uses a multiple linear regression analysis method, with temperature and humidity as independent variables and test error as the dependent variable, to establish a mathematical model between temperature-humidity and test error. Through fitting and optimization of historical data, the temperature-humidity compensation coefficient matrix is ​​obtained and stored in the non-volatile memory of control box 8. For example, after analyzing 1500 sets of historical data, the temperature compensation coefficient matrix is ​​[0.015, -0.025, 0.035], and the humidity compensation coefficient matrix is ​​[-0.055, 0.045, -0.03].

[0069] S105: Applying a preset torque by driving the second drive shaft 48 and the third drive shaft 26: According to the test plan, the control box 8 sends control commands to the first drive motor of the automatic testing device 6 and the second drive motor of the downstream detection device 2. The first and second drive motors operate according to the preset torque curves and speeds, applying a stable preset torque to the workpiece 9 under test through the first drive shaft 68, the second drive shaft 48, and the third drive shaft 26. For example, in this test, the preset torque is 60 N·m. Under the precise control of the control box 8, the first and second drive motors gradually adjust their output torques to ensure that the workpiece 9 under test bears a torque of 60 N·m. During the torque application process, the control box 8 monitors the torque and speed of each drive shaft in real time to ensure that the torque application is stable and accurate.

[0070] S106: Real-time acquisition of frictional torque data for the second drive shaft 48 and the third drive shaft 26: High-precision frictional torque sensors are installed on the second drive shaft 48 and the third drive shaft 26. These sensors acquire the frictional torque data generated during the rotation of the drive shafts in real time. The sensors transmit the acquired data to the signal processing module of the control box 8 via an analog input module. The signal processing module amplifies and filters the data before transmitting it to the central processing unit of the control box 8 for storage and analysis. The frictional torque sensor has a measurement accuracy of ±0.05 N·m, accurately capturing minute changes in frictional torque and providing accurate data support for subsequent compensation parameter calculations.

[0071] S107: Analyzing the trend of frictional torque with temperature based on an LSTM neural network model and dynamically generating compensation parameters: Control box 8 inputs real-time collected frictional torque and temperature data into a pre-trained LSTM neural network model. The LSTM neural network model, trained on a large amount of historical data, can learn the complex nonlinear relationship between frictional torque and temperature. Based on the input data, the model predicts future trends and dynamically generates compensation parameters. For example, when the model predicts that the frictional torque increases with rising temperature, it generates corresponding positive compensation parameters to increase the output torque of the drive motor to counteract the influence of the frictional torque. The generation process of compensation parameters is based on the model's in-depth analysis of historical and real-time data, enabling it to adapt to changes under different test conditions.

[0072] S108: Sending compensation parameters to the first and second drive motors to correct torque output commands: Control box 8 sends the generated compensation parameters to the controllers of the first and second drive motors. The controllers adjust the output torque of the motors according to the compensation parameters, achieving dynamic and precise control of torque output. For example, if the compensation parameter is +2 N·m, the controller will control the first and second drive motors to increase the output torque by 2 N·m, ensuring that the torque applied to the workpiece 9 under test is always kept near the preset value. During the correction of torque output commands, control box 8 continuously monitors the actual output value of the torque and adjusts the compensation parameters according to the feedback, forming a closed-loop control to ensure the accuracy of the test.

[0073] Reference Figure 9 A test method for the function of a power steering column with intermediate shaft is based on workpiece adaptation and adjustment steps:

[0074] S201: Input the relevant parameters of the workpiece 9 to be tested through the human-machine interface of the control box 8;

[0075] S202: Automatically call the pre-stored three-dimensional adjustment model to calculate the required height adjustment of the first lifting seat 63, the second lifting seat 43 and the third lifting seat 33, and the angle compensation values ​​of the first rotating shaft 64, the second rotating shaft 44, the third rotating shaft 34 and the fourth rotating shaft 22;

[0076] S203: Height adjustment is performed by the corresponding height adjustment amounts of the first lifting drive 62, the second lifting drive 42 and the third lifting drive 32;

[0077] S204: Angle adjustment is performed by the corresponding angle compensation values ​​of the first angle adjustment drive 66, the second angle adjustment drive 46, the third angle adjustment drive 36 and the fourth angle adjustment drive 24.

[0078] Specifically, the operator inputs relevant parameters of the workpiece 9 to be tested, such as length, diameter, and installation angle, through the human-machine interface of the control box 8. The control box 8 automatically calls up the pre-stored three-dimensional adjustment model and calculates the required height adjustment of the first lifting seat 63, the second lifting seat 43, and the third lifting seat 33, as well as the angle compensation values ​​of the first rotating shaft 64, the second rotating shaft 44, the third rotating shaft 34, and the fourth rotating shaft 22, based on the input workpiece parameters and the mechanical structure parameters of the equipment. According to the calculation results, the control box 8 sends control commands to the first lifting drive component 62, the second lifting drive component 42, the third lifting drive component 32, the first angle adjustment drive component 66, the second angle adjustment drive component 46, the third angle adjustment drive component 36, and the fourth angle adjustment drive component 24. Each drive component drives the corresponding parts to perform height and angle adjustments according to the commands, so that each device of the equipment can accurately adapt to the workpiece 9 to be tested, ensuring the accuracy and reliability of the test. During the adjustment process, the control box 8 monitors the motion status and position feedback of each drive component in real time to ensure that the adjustment action is accurate and error-free.

[0079] Example 2

[0080] In actual production, power steering columns with intermediate shafts come in a wide variety of specifications. When frequently changing the workpiece 9 to be tested, traditional manual identification and installation methods are inefficient and prone to errors. This embodiment addresses this problem by adding a multi-specification workpiece quick-change and intelligent identification system to the product fixing device 3 and control box 8. An intelligent fixture identification and automatic changing mechanism is added to the second mounting base 37 of the product fixing device 3. The fixture modules adopt a standardized design, with each module equipped with an electronic tag storing information such as the workpiece specifications and dimensions applicable to that fixture. When it is necessary to change the workpiece 9 to be tested, the operator places the new fixture module on the second mounting base 37. The electronic tag reader on the mounting base immediately reads the fixture information and transmits the data to the control box 8.

[0081] After receiving the fixture information, control box 8 automatically recalls the pre-stored test parameters and adjustment model for the corresponding workpiece. Simultaneously, control box 8 interacts with the material management system on the production line to obtain detailed information about the workpiece to be tested, including batch number and model. In this way, control box 8 completes most of the pre-test preparations before the workpiece is even installed on the equipment.

[0082] Based on the acquired information, control box 8 automatically calculates and controls the height adjustment of the first lifting seat 63, the second lifting seat 43, and the third lifting seat 33, as well as the angle compensation values ​​of the first rotating shaft 64, the second rotating shaft 44, the third rotating shaft 34, and the fourth rotating shaft 22, ensuring that each device is pre-adjusted to the position suitable for the new workpiece. Once the workpiece is installed, the operator only needs to click the "Start Test" button on the human-machine interface of control box 8 to quickly start the testing process, significantly shortening the workpiece changeover and test preparation time and improving testing efficiency.

[0083] Example 3

[0084] To further improve the reliability and stability of the testing equipment and reduce downtime due to equipment failure, this embodiment adds a fault diagnosis and predictive maintenance system. Various types of sensors, such as vibration sensors, temperature sensors, and current sensors, are added to the automatic testing device 6, the input force detection device 4, the downstream detection device 2, and each drive component. These sensors collect various data in real time during equipment operation, including motor vibration, transmission shaft temperature changes, and drive motor current fluctuations.

[0085] The control box 8 incorporates a deep learning-based fault diagnosis algorithm. This algorithm analyzes the collected sensor data in real time and compares it with a pre-established normal operation data model to quickly and accurately determine whether the equipment has a fault, as well as the type and location of the fault. For example, when the vibration sensor detects abnormal vibration of the drive shaft, the fault diagnosis algorithm can analyze the vibration frequency, amplitude, and other characteristics to determine whether the fault is caused by bearing wear, shaft imbalance, or other reasons.

[0086] In addition to fault diagnosis, the system also has predictive maintenance capabilities. By analyzing historical sensor data and training machine learning algorithms, the system can predict the remaining lifespan of each component of the equipment. When the remaining lifespan of a component approaches the warning threshold, the control box 8 will issue a warning message on the human-machine interface, reminding operators to perform timely maintenance or replace the component to avoid sudden equipment failures and ensure the continuity of testing work.

[0087] Example 4

[0088] In modern manufacturing, the demand for remote monitoring and collaborative work is increasing. This embodiment adds a remote monitoring and collaborative testing system, enabling remote operation and multi-location collaborative testing of testing equipment. A cloud-based remote monitoring platform is built, and the control box 8 uploads real-time operating data and test results of the testing equipment to the platform via the network. Operators can log in to the remote monitoring platform anytime, anywhere using computers, mobile phones, and other terminal devices to view the equipment's operating status, testing progress, and real-time data charts. Simultaneously, the platform also supports video monitoring, allowing operators to observe the equipment's operation in real time using cameras installed around the equipment.

[0089] The remote monitoring platform not only monitors equipment status but also provides remote operation capabilities. When needed, operators can send control commands to control box 8 via the platform to remotely control the testing equipment, such as starting or stopping tests, adjusting test parameters, and switching test modes. This function is particularly useful when equipment malfunctions, allowing technicians to troubleshoot and debug remotely, reducing on-site maintenance time and costs.

[0090] For some complex testing tasks, it may be necessary for testing equipment at multiple locations to work collaboratively. The remote monitoring platform supports collaborative testing capabilities, allowing testing equipment at different locations to share data and synchronize control through the platform. For example, when conducting overall performance testing of an automotive steering system, power steering column and intermediate shaft testing equipment located in different laboratories can perform tests simultaneously and upload their respective test data to the platform for comprehensive analysis, improving the comprehensiveness and accuracy of the testing.

[0091] Example 5

[0092] To better utilize test data and improve product quality, this embodiment adds a test data in-depth analysis and quality traceability system. Control box 8 performs in-depth analysis of the large amount of data collected during the testing process. In addition to calculating conventional indicators such as output torque fluctuation rate and transmission efficiency, it also uses data mining and machine learning techniques to perform multi-dimensional analysis and mining of the data. For example, by performing cluster analysis on test data from different batches of products, it identifies differences in product performance and potential quality problems; and by using association rule mining algorithms, it analyzes the correlation between test parameters and product performance, providing a basis for optimizing test plans and product design.

[0093] A comprehensive quality traceability system has been established, linking the test data of each workpiece to be tested with information such as the product's production batch, production line, and raw materials. When quality problems arise during subsequent use, the test data can be queried to quickly trace back to each stage of the production process, identify the possible causes of the quality problems, and facilitate quality improvement and accountability for the company.

[0094] Based on in-depth data analysis, the system automatically generates visualized test reports. These reports, presented in charts and tables, showcase product performance indicators, quality analysis results, and quality traceability information in a clear and intuitive manner, facilitating review and analysis by enterprise managers and technicians and providing strong support for enterprise decision-making.

[0095] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A power steering column with intermediate shaft function testing equipment, characterized in that, The device includes a frame (1), on which a downstream detection device (2), a product fixing device (3), an input force detection device (4), and a mode switching device (5) are sequentially arranged. The mode switching device (5) is equipped with an automatic testing device (6) and a manual testing device (7). The automatic testing device (6) or the manual testing device (7) is driven by the mode switching device (5) to be set to correspond to the input force detection device (4). The frame (1) is also equipped with a control box (8) for coordinating the actions of each device and processing the detection data. According to the product fixing device (3), the product fixing device (3) is used to fix the workpiece to be tested (9). The input force detection device (4) fixes one end of the workpiece to be tested (9). The automatic testing device (6) drives the input force detection device (4) to apply a preset torque to the workpiece to be tested (9) and transmits the detection signal to the control box (8) in real time. The rear detection device (2) is connected to the other end of the workpiece to be tested (9) away from the input force detection device (4) and is used to monitor the output torque fluctuation rate and transmission efficiency of the workpiece to be tested (9) under torque input. The automatic testing device (6) includes a first fixed base (61), a first lifting drive (62) on the first fixed base (61), a first lifting seat (63) on the first lifting drive (62), and the first lifting seat (63) is driven to move up and down relative to the first fixed base (61) by the first lifting drive (62); the first lifting seat (63) is provided with a first rotating shaft (64), a first angle rotation platform (65) on the first rotating shaft (64), and a first angle adjustment drive (66) connected to the first rotating shaft (64), and the first angle adjustment drive (66) drives the first angle rotation platform (65) to adjust the angle relative to the first lifting seat (63); the first angle rotation platform (65) is provided with a first power output unit (67) composed of a first drive motor and a first reduction gear, and a first transmission shaft (68) connected to the first power output unit (67); The input force detection device (4) includes a second fixed base (41), a second lifting drive (42) is provided on the second fixed base (41), and a second lifting seat (43) is provided on the second lifting drive (42). The second lifting seat (43) is driven to move up and down relative to the second fixed base (41) by the second lifting drive (42). The second lifting seat (43) is provided with a second rotating shaft (44), and a second angle rotation platform (45) is provided on the second rotating shaft (44). The second rotating shaft (44) is connected to a second angle adjustment drive (46). The second angle adjustment drive (46) drives the second angle rotation platform (45) to adjust the angle relative to the second lifting seat (43). The second angle rotation platform (45) is provided with a plurality of first mounting seats (47). A second transmission shaft (48) is rotatably provided on the first mounting seat (47). One end of the second transmission shaft (48) is connected to the workpiece (9) to be tested, and the other end is connected to the automatic testing device (6). The product fixing device (3) includes a third fixing seat (31), a third lifting drive (32) on the third fixing seat (31), a third lifting seat (33) on the third lifting drive (32), and the third lifting seat (33) is driven by the third lifting drive (32) to move up and down relative to the third fixing seat (31); the third lifting seat (33) is provided with a third rotating shaft (34), the third rotating shaft (34) is provided with a third angle rotating platform (35), the third rotating shaft (34) is connected to a third angle adjustment drive (36), and the third angle adjustment drive (36) drives the third angle rotating platform (35) to adjust the angle relative to the third lifting seat (33); the third angle rotating platform (35) is provided with a second mounting seat (37) for fixing the workpiece (9) to be tested; The rear detection device (2) includes a fourth fixed base (21), a fourth rotating shaft (22) is provided on the fourth fixed base (21), a fourth angle rotation platform (23) is provided on the fourth rotating shaft (22), and a fourth angle adjustment drive (24) is connected to the fourth rotating shaft (22). The fourth angle adjustment drive (24) drives the fourth angle rotation platform (23) to adjust its angle relative to the fourth fixed base (21). The fourth angle rotation platform (23) is provided with a second power output unit (25) composed of a second drive motor and a second reduction mechanism, and a third transmission shaft (26) connected to the second power output unit (25).

2. The power steering column with intermediate shaft function testing equipment according to claim 1, characterized in that, The mode switching device (5) includes a slide rail (51) on the frame (1), a slider (52) on the slide rail (51), a moving platform (53) on the slider (52), the automatic testing device (6) and the manual testing device (7) on the moving platform (53), and the moving platform (53) is connected to a mode switching drive (54). Driven by the mode switching drive (54), the automatic testing device (6) or the manual testing device (7) is set to correspond to the input force detection device (4).

3. The power steering column with intermediate shaft function testing equipment according to claim 1, characterized in that, The first angle rotation platform (65) is provided with a front-to-back adjustment component (69), and the first power output unit (67) is located on the front-to-back adjustment component (69). The front-to-back adjustment component (69) drives the first transmission shaft (68) to move closer to or further away from the input force detection device (4), automatically completing the connection or separation with the input force detection device (4).

4. The power steering column with intermediate shaft function testing equipment according to claim 1, characterized in that, The second drive shaft (48) has a rotating wheel (49) at one end away from the product fixing device (3).

5. A method for testing the function of a power steering column with intermediate shaft, using the power steering column with intermediate shaft function testing equipment according to any one of claims 1-4, characterized in that, Includes the following steps: Start the automatic calibration program of the control box (8); The sensors installed in the input force detection device (4) and the downstream detection device (2) collect ambient temperature and humidity data; Wavelet denoising algorithm is used to preprocess the raw sensor data to eliminate sensor baseline offset; A temperature-humidity compensation coefficient matrix is ​​established based on historical calibration data and stored in the non-volatile memory of the control box (8); A preset torque is applied by driving the second drive shaft (48) and the third drive shaft (26); Real-time acquisition of frictional torque data of the second drive shaft (48) and the third drive shaft (26); The friction torque variation trend with temperature is analyzed based on the LSTM neural network model, and compensation parameters are dynamically generated. The compensation parameters are sent to the first drive motor and the second drive motor to correct the torque output command.

6. The power steering column with intermediate shaft function test method according to claim 5, characterized in that, It also includes the following steps: Input the relevant parameters of the workpiece (9) to be tested through the human-machine interface of the control box (8); The pre-stored three-dimensional adjustment model is automatically invoked to calculate the required height adjustment of the first lifting seat (63), the second lifting seat (43) and the third lifting seat (33), and the angle compensation values ​​of the first rotating shaft (64), the second rotating shaft (44), the third rotating shaft (34) and the fourth rotating shaft (22); Height adjustment is performed by the first lifting drive (62), the second lifting drive (42) and the third lifting drive (32) corresponding to the height adjustment amount; Angle adjustment is performed by the corresponding angle compensation values ​​of the first angle adjustment drive (66), the second angle adjustment drive (46), the third angle adjustment drive (36) and the fourth angle adjustment drive (24).

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