Power-assisted steering column with intermediate shaft function test equipment and method

Abstract

The invention relates to high-end equipment manufacturing, in particular to a power-assisted steering column with an intermediate shaft function test device 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 an automatic test device and a manual test device are arranged on the mode switching device. Each device has a structure with adjustable height and angle, and can be accurately butted with to-be-tested workpieces with different specifications, so that the compatibility and adaptability of equipment are improved. The test method combines an automatic calibration program, a wavelet noise reduction algorithm, establishment of a compensation coefficient matrix, an LSTM neural network model and other technologies, considers the influence of environmental factors and friction torque, realizes dynamic and accurate control of torque output, and improves the accuracy, reliability and adaptability of a test result. The equipment can also rapidly switch test modes, is simple, convenient and safe to operate, and provides powerful support for performance evaluation and product quality control of the power-assisted steering column with the intermediate shaft.

Description

Technical Field

[0001] This application relates to high-end equipment manufacturing, and particularly to a functional test device and method for a power steering column with an intermediate shaft function. Background Art

[0002] In the automotive industry, with the continuous pursuit of vehicle safety and comfort, the power steering system has become an indispensable part of modern automobiles. As one of the key components, the overall performance of the steering column together with its intermediate shaft is directly related to the driving experience and traffic safety. Therefore, it is particularly important to strictly control its quality during the production and manufacturing process. In recent years, in order to meet the diverse market demands and improve the product quality level, more advanced equipment and technical means have been gradually introduced for the functional testing of these components, promoting the technical level of the entire industry to a new height.

[0003] In this context, the industry usually adopts various methods for the functional detection of similar components. For example, fixed fixtures are used in combination with manual operations to complete basic parameter measurements; or early versions of semi-automatic devices are used to conduct stress loading tests under specific conditions. In addition, in some cases, simple robotic arms are used to simulate the actual working conditions to evaluate the overall performance. Although the above methods have their own focuses and can cover a certain range of application scenarios, they generally lack flexibility and general-purpose design considerations.

[0004] However, the existing functional test equipment has obvious deficiencies in that it cannot effectively accommodate multiple specifications of products to carry out accurate and efficient test operations simultaneously. This limitation not only restricts the enterprise's ability to quickly respond to market demand changes, but also increases the additional cost burden. Especially when facing different size and shape requirements, it shows obvious adaptation obstacles, and there is an urgent need for a new idea to break through this bottleneck problem.

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

[0006] One objective of this application is to provide a functional test device for a power steering column with an intermediate shaft function.

[0007] The above technical object of the present application is achieved through the following technical solutions: A functional test device for a power steering column with an intermediate shaft function, including a frame, on which a rear-section detection device, a product fixing device, an input force detection device, and a mode switching device are sequentially arranged. An automatic test device and a manual test device are arranged on the mode switching device. Through the drive of the mode switching device, the automatic test device or the manual test device is arranged corresponding to the input force detection device. A control box is also arranged on the frame, which is used to coordinate the actions of each device and process the detection 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, and through the drive of the automatic test device, the input force detection device applies a preset torque to the workpiece to be tested and transmits the detection signal to the control box in real time; the rear-section detection 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 volatility and transmission efficiency of the workpiece to be tested under torque input.

[0008] By adopting the above technical solutions, on the one hand, the frame serves as a bearing foundation, and the layout of each device on it is reasonable. The rear-section detection device can accurately monitor the key performance indicators such as output torque volatility and transmission efficiency at the output end of the workpiece to be tested under torque input, providing accurate data for the performance evaluation of the product backend; the product fixing device ensures the stable installation of the workpiece to be tested and avoids test displacement errors. On the other hand, the input force detection device combined with the automatic test device or the manual test device can flexibly switch the test mode according to requirements. It can not only use the automatic test device to drive and input the preset torque efficiently and accurately, but also meet special working conditions or debugging requirements during manual testing, and the detection signal is transmitted to the control box in real time, facilitating timely data processing. Moreover, the setting of the mode switching device greatly improves the versatility and adaptability of the device, enabling it to be compatible with power steering columns with intermediate shafts of different specifications and different test requirements, effectively solving the problem that it is difficult for the existing technology to cope with the accurate and efficient testing of multi-specification products, and helping enterprises reduce costs and quickly respond to market changes.

[0009] Optionally, the mode switching device includes a slide rail arranged on the frame, a slider is arranged on the slide rail, a moving platform is arranged on the slider, the automatic test device and the manual test device are arranged on the moving platform, and the moving platform is connected with a mode switching driving member. Through the drive of the mode switching driving member, the automatic test device or the manual test device is arranged corresponding to the input force detection device.

[0010] By adopting the above technical solutions, 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 unstable situations such as deviation and shaking, thereby guaranteeing the accuracy and reliability of the testing. Secondly, integrating the automatic testing device and the manual testing device on the moving platform and driving them by the mode switching driving member realizes the rapid and convenient switching between the two testing modes, greatly improving the flexibility of the testing process. When automatic batch testing is required, the automatic testing device can be quickly aligned with the input force detection device to give full play to its advantages of high efficiency and precision; while in cases where manual fine debugging, special working condition verification, etc. are needed, it can be immediately switched to the manual testing device to meet diverse testing requirements. This flexible switching mechanism effectively saves testing time, optimizes the overall usage efficiency of the equipment, and further enhances the adaptability of the power steering column with intermediate shaft function testing equipment to complex and variable testing scenarios.

[0011] Optionally, the automatic testing device includes a first fixed seat, a first lifting driving member is provided on the first fixed seat, a first lifting seat is provided on the first lifting driving member, and the first lifting seat is driven by the first lifting driving member to move up and down relative to the first fixed seat; a first rotating shaft is provided on the first lifting seat, a first angle rotating platform is provided on the first rotating shaft, the first rotating shaft is connected with a first angle adjusting driving member, and the first angle rotating platform is driven by the first angle adjusting driving member to adjust the angle relative to the first lifting seat; a first power output unit composed of a first driving motor and a first speed reducer, and a first transmission shaft connected to the first power output unit are provided on the first angle rotating platform.

[0012] By adopting the above technical solutions, in terms of position adjustment, the first lifting driving member 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 to be tested with different height specifications, enhancing the compatibility of the equipment with various products. The first angle adjusting driving member drives the first angle rotating platform to adjust the angle relative to the first lifting seat, enabling the first transmission shaft to be in different angular positions, meeting the testing requirements for applying torque to the workpiece to be tested under different angular conditions, and improving the comprehensiveness and accuracy of the testing. In terms of power output, the first power output unit composed of the first driving motor and the first speed reducer can provide stable and adjustable power for the first transmission shaft, ensuring that a preset torque can be accurately applied to the workpiece to be tested. At the same time, the first speed reducer can reasonably adjust the output speed and torque magnitude according to the testing requirements, further improving the controllability and precision of the testing process. Generally speaking, the design of this automatic testing device greatly enhances the flexibility, versatility, and testing precision of the power steering column with intermediate shaft function testing equipment.

[0013] Optionally, a front-back adjustment component is provided on the first angular rotation platform, and the first power output unit is arranged on the front-back adjustment component. The first transmission shaft is driven by the front-back adjustment component to move towards or away from the input force detection device, automatically completing the connection or separation from the input force detection device.

[0014] By adopting the above technical solution, in terms of the convenience of test operation, the front-back adjustment component drives the first transmission shaft to move towards or away from the input force detection device, automatically completing the connection or separation, greatly simplifying the equipment assembly process. There is no need for manual laborious docking of the transmission shaft, saving the preparation time before the test and improving the test efficiency. Considering the accuracy and stability of the test, the automatic connection process can ensure the precise alignment of the first transmission shaft and the second transmission shaft of the input force detection device, reducing the deviation that may be caused by manual connection, ensuring stable and efficient torque transmission, and improving the accuracy of the test data. In addition, this design of automatic connection and separation avoids the risk of misoperation that may be brought by manual operation, enhancing the safety and reliability of the equipment operation. Moreover, this design further improves the automation level of the equipment, making it more in line with the requirements of intelligent and high-efficiency production in modern high-end equipment manufacturing, providing strong support for the upgrade and development of the power-assisted steering column with intermediate shaft function test equipment.

[0015] Optionally, the input force detection device includes a second fixed seat, a second lifting driving member is provided on the second fixed seat, a second lifting seat is arranged on the second lifting driving member, and the second lifting seat is driven by the second lifting driving member to perform a lifting movement relative to the second fixed seat; a second rotating shaft is provided on the second lifting seat, a second angular rotation platform is arranged on the second rotating shaft, the second rotating shaft is connected with a second angular adjustment driving member, and the second angular rotation platform is driven by the second angular adjustment driving member to perform an angular adjustment relative to the second lifting seat; a plurality of first mounting seats are arranged on the second angular rotation platform, a second transmission shaft is rotatably arranged on the first mounting seat, one end of the second transmission shaft is connected with the workpiece to be tested, and the other end is connected with the automatic test device.

[0016] By adopting the above technical solution, the second lifting drive drives the second lifting seat to lift, and cooperates with the second angle adjustment drive to drive the second angle rotating platform to rotate. The two work together, enabling the second transmission shaft to flexibly adjust its position and angle in three-dimensional space. Regardless of how the specifications, shapes, and installation postures of the workpieces to be measured change, accurate docking can be achieved, greatly broadening the range of products that the equipment can detect and effectively solving the problem of adapting to multi-specification products. At the level of force transmission and detection, one end of the second transmission shaft is stably connected to the workpiece to be measured, and the other end is connected to the automatic testing device, ensuring stable and efficient torque transmission and providing guarantee for subsequent accurate measurement of the input force. At the same time, multiple first mounting seats are provided, which not only provide reliable support for the second transmission shaft, but also enable multiple groups of transmission shafts to work in parallel or be switched as spares when necessary, further improving the reliability and fault tolerance of the equipment and comprehensively optimizing the accuracy, versatility, and stability of the function test of the power steering column with an intermediate shaft.

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

[0018] By adopting the above technical solution, the rotating wheel disc provides an intuitive and convenient operation force application point for the operator in the manual testing mode. The operator only needs to rotate the wheel disc to easily apply torque to the second transmission shaft. Compared with directly manipulating the transmission shaft, the operation is more labor-saving and accurate, effectively improving the convenience and operability of manual testing. Secondly, in terms of visual monitoring, the rotation state of the wheel disc can directly reflect the rotation of the transmission shaft, facilitating the operator to observe the torque transmission process in real time and promptly detect abnormalities such as jamming and uneven rotation speed, and then quickly make adjustments to ensure the smooth progress of the test. Furthermore, from the perspective of the overall compatibility of the equipment, the addition of the rotating wheel disc does not change the core functions of the original structure, but cleverly optimizes the manual operation link, enabling the test equipment to further improve the practicality of the manual testing mode while taking into account the high efficiency of automated testing, better meeting the needs of different testing scenarios and operators, and enhancing the comprehensive performance of the power steering column with an intermediate shaft function test equipment.

[0019] Optionally, the product fixing device includes a third fixing seat, a third lifting drive is provided on the third fixing seat, a third lifting seat is provided on the third lifting drive, and the third lifting drive drives the third lifting seat to move up and down relative to the third fixing seat; a third rotating shaft is provided on the third lifting seat, a third angle rotating platform is provided on the third rotating shaft, the third rotating shaft is connected to a third angle adjustment drive, and the third angle adjustment drive drives the third angle rotating platform to adjust the angle relative to the third lifting seat; a second mounting seat is provided on the third angle rotating platform for fixedly installing the workpiece to be measured.

[0020] By adopting the above technical solution, the combination of the third lifting drive and the third lifting seat can accurately adjust the vertical position of the fixing device according to the height difference of the workpiece to be tested, ensuring that it can perfectly fit the bottom of products of different specifications, avoiding installation difficulties or test errors caused by height mismatch. At the same time, the third angle adjustment drive drives the third angle rotation platform to rotate, and cooperates with the setting of the third rotating shaft, so that the workpiece to be tested fixed on the second mounting seat can be adjusted at multiple angles in the horizontal direction to meet various special installation angle requirements, greatly expanding the range of product types compatible with the equipment. On the other hand, from the perspective of test stability, this multi-dimensional adjustment function can adjust the workpiece to the optimal stress state when fixing it, ensuring that in subsequent input force detection, torque loading and other test links, the workpiece to be tested always remains stable, and will not be displaced or shaken due to uneven force, thereby providing a solid foundation for accurate testing, and comprehensively improving the versatility, adaptability and accuracy of the test results of the power steering column with intermediate shaft function test equipment.

[0021] Optionally, the rear-stage detection device includes a fourth fixed seat, the fourth fixed seat is provided with a fourth rotating shaft, the fourth rotating shaft is provided with a fourth angle rotation platform, the fourth rotating shaft is connected to a fourth angle adjustment driving member, and the fourth angle rotation platform is driven by the fourth angle adjustment driving member to adjust the angle relative to the fourth fixed seat; the fourth angle rotation platform is provided with a second power output unit consisting of a second drive motor and a second reducer, and a third transmission shaft connected to the second power output unit.

[0022] By adopting the above technical solution, the fourth angle adjustment drive member drives the fourth angle rotating platform to adjust the angle relative to the fourth fixed seat, so that the third transmission shaft can flexibly adjust the angle to adapt to the installation angle and test requirements of different workpieces to be tested, which greatly improves the compatibility and adaptability of the rear-end detection device to various specifications of products. Secondly, the second power output unit composed of the second drive motor and the second reducer provides a stable and adjustable power for the third transmission shaft, which can accurately apply a suitable load to the workpiece to be tested, thereby more accurately monitoring the output torque fluctuation rate and transmission efficiency of the workpiece to be tested under torque input, and improving the accuracy and reliability of the test results. In addition, this structural design enables the rear-end detection device to better simulate the actual working state during the test process, providing more real and effective data support for the performance evaluation of the power steering column with an intermediate shaft, helping to discover potential problems and make targeted improvements, and enhancing the ability of the entire test equipment to control product quality.

[0023] The second purpose of the present application is to provide a method for testing the function of a power steering column with an intermediate shaft.

[0024] A functional test method for a power steering column with an intermediate shaft, using the above-mentioned functional test equipment for the power steering column with an intermediate shaft, includes the following steps: Start the automatic calibration program of the control box; Collect ambient temperature and humidity data through the sensors set by the input force detection device and the rear section detection device; Preprocess the original sensor data using the wavelet denoising algorithm to eliminate the baseline shift of the sensor; Establish a temperature-humidity compensation coefficient matrix based on historical calibration data and store it in the non-volatile memory of the control box; Apply a preset torque by driving the second drive shaft and the third drive shaft; Collect the friction torque data of the second drive shaft and the third drive shaft in real time; Analyze the changing trend of the friction torque with temperature based on the LSTM neural network model and dynamically generate compensation parameters; Send the compensation parameters to the first drive motor and the second drive motor to correct the torque output command.

[0025] By adopting the above technical solutions, starting the automatic calibration program of the control box can eliminate the initial error of the equipment and ensure the basis of test accuracy. Collecting ambient temperature and humidity data and preprocessing them using the wavelet denoising algorithm can effectively remove the noise of the original sensor data and improve the data quality. Establishing a temperature-humidity compensation coefficient matrix based on historical calibration data fully considers the influence of environmental factors on the test results and can correct the deviation caused by environmental factors in real time. Driving the second and third drive shafts to apply a preset torque and collecting their friction torque data in real time provides key data for subsequent analysis. Using the LSTM neural network model to analyze the changing trend of the friction torque with temperature and dynamically generate compensation parameters can accurately grasp the complex relationship between the two. Furthermore, sending the compensation parameters to the first and second drive motors to correct the torque output command realizes the dynamic and accurate control of the torque output during the test, making the test closer to the 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 an intermediate shaft.

[0026] Optionally, it further includes the following steps: Input relevant parameters of the workpiece to be tested through the human-machine interface of the control box; Automatically call the pre-stored three-dimensional adjustment model to calculate the required height adjustment amounts of the first lifting seat, the second lifting seat and the third lifting seat, and the angle compensation values of the first rotating shaft, the second rotating shaft, the third rotating shaft and the fourth rotating shaft; Execute height adjustment corresponding to the height adjustment amount through the first lifting drive member, the second lifting drive member and the third lifting drive member; Angle adjustment is performed by the first angle adjustment driving member, the second angle adjustment driving member, the third angle adjustment driving member and the fourth angle adjustment driving member corresponding to the angle compensation values.

[0027] By adopting the above technical solution, the operator can conveniently input the relevant parameters of the workpiece to be measured through the human-machine interface of the control box. The operation is simple and intuitive, reducing the requirements for the operator's professional skills. Secondly, the system automatically calls the pre-stored three-dimensional adjustment model, which can quickly and accurately calculate the height adjustment amounts required for the first, second, and third lifting seats and the angle compensation values of the first, second, third, and fourth rotating shafts, avoiding the errors and time-consuming problems that may occur in manual calculation and improving the efficiency of the test preparation stage. Furthermore, the first, second, and third lifting driving members perform height adjustment according to the calculated height adjustment amounts, and the first, second, third, and fourth angle adjustment driving members perform angle adjustment corresponding to the angle compensation values, enabling the device to automatically and accurately adjust the height and angle of each device to meet the test requirements of workpieces to be measured with different specifications and shapes, greatly enhancing the versatility and compatibility of the test device, ensuring the precise docking of each device with the workpiece to be measured during the test process, and further improving the accuracy and reliability of the test results.

[0028] In summary, the present application has at least the following beneficial effects: 1. Each device of the test device, such as the automatic test device, the input force detection device, the product fixing device, the post-stage detection device, etc., is provided with a structure that can adjust the height and angle. Through the corresponding driving members and adjustment components, the position and angle of each device can be flexibly adjusted according to the requirements of workpieces to be measured with different specifications, accurately docking with the workpiece to be measured, greatly enhancing the compatibility and adaptability of the device to various products, and effectively solving the problem that it is difficult for the prior art to cope with the precise and efficient testing of multi-specification products.

[0029] 2. The test method comprehensively uses advanced technical means such as an automatic calibration program, a wavelet denoising algorithm, establishing a temperature-humidity compensation coefficient matrix, and an LSTM neural network model to comprehensively process and analyze the test data, fully considering the influence of environmental factors and frictional torque on the test results, realizing dynamic and precise control of torque output, improving the accuracy, reliability and adaptability of the test results, and at the same time making the test process intelligent, and can provide valuable reference basis for the performance evaluation and improvement of products.

[0030] 3. The mode switching device is provided with an automatic test device and a manual test device, and the two test modes can be quickly and conveniently switched through the mode switching driving member. The automatic test device can efficiently and accurately complete batch test tasks, while the manual test device can meet special working conditions or debugging requirements. The flexible test mode selection not only improves the test efficiency, but also meets diverse test scenarios, enhancing the overall use efficiency and practicality of the device.

[0031] 4. The second mounting seat of the product fixing device can stably fix the workpiece to be tested. The rotating wheel disc at one end of the second transmission shaft of the input force detection device provides a convenient operating force point for manual testing. Moreover, the adjustment operations of each device can be automatically completed by inputting parameters through the human-machine interface of the control box, reducing the operation difficulty. At the same time, safety protection mechanisms, safety limits, operation specification prompts, real-time monitoring and emergency stop measures are set during manual rotation testing, ensuring the safety of the operator and the smooth progress of the test. Description of the Drawings

[0032] Figure 1 is a schematic structural diagram of a power steering column with an intermediate shaft function test device; Figure 2 is a schematic structural diagram of the mode switching device; Figure 3 is a schematic structural diagram of the automatic test device; Figure 4 is a schematic structural diagram of the input force detection device; Figure 5 is a schematic structural diagram of the product fixing device; Figure 6 is a schematic structural diagram of the rear-section detection device; Figure 7 is a schematic structural diagram of the manual test device; Figure 8 is a flowchart of the basic process steps of the power steering column with an intermediate shaft function test method; Figure 9 is a flowchart of the workpiece adaptation adjustment steps of the power steering column with an intermediate shaft function test method.

[0033] Reference Numerals 1. Frame; 2. Rear-section detection device; 21. Fourth fixing seat; 22. Fourth rotating shaft; 23. Fourth angular rotation platform; 24. Fourth angular adjustment driving member; 25. Second power output unit; 26. Third transmission shaft; 3. Product fixing device; 31. Third fixing seat; 32. Third lifting driving member; 33. Third lifting seat; 34. Third rotating shaft; 35. Third angular rotation platform; 36. Third angular adjustment driving member; 37. Second mounting seat; 4. Input force detection device; 41. Second fixing seat; 42. Second lifting driving member; 43. Second lifting seat; 44. Second rotating shaft; 45. Second angular rotation platform; 46. Second angular adjustment driving member; 47. First mounting seat; 48. Second transmission shaft; 49. Rotating wheel disc; 5. Mode switching device; 51. Slide rail; 52. Slide block; 53. Moving platform; 54. Mode switching driving member; 6. Automatic testing device; 61. First fixing seat; 62. First lifting driving member; 63. First lifting seat; 64. First rotating shaft; 65. First angular rotation platform; 66. First angular adjustment driving member; 67. First power output unit; 68. First transmission shaft; 69. Front-back adjustment assembly; 7. Manual testing device; 8. Control box; 9. Workpiece to be tested. Detailed implementation manners

[0034] The following further elaborates on this application with reference to the accompanying drawings.

[0035] In this embodiment, referring to Figures 1-7 , a power steering column with an intermediate shaft function testing device includes a frame 1. A rear-section detection device 2, a product fixing device 3, an input force detection device 4, and a mode switching device 5 are successively arranged on the frame 1. An automatic testing device 6 and a manual testing device 7 are arranged on the mode switching device 5. The automatic testing device 6 or the manual testing device 7 is driven by the mode switching device 5 to be correspondingly arranged relative to the input force detection device 4. A control box 8 is further arranged on the frame 1 for coordinating the actions of each device and processing the detection data; the product fixing device 3 is used for fixing the workpiece to be tested 9, and the input force detection device 4 fixes one end of the workpiece to be tested 9. The input force detection device 4 is driven by the automatic testing device 6 to apply a preset torque to the workpiece to be tested 9 and transmit the detection signal to the control box 8 in real time; the rear-section detection device 2 is connected to the other end of the workpiece to be tested 9 away from the input force detection device 4 for monitoring the output torque volatility and transmission efficiency of the workpiece to be tested 9 under torque input.

[0036] Specifically, the frame 1 serves as the basic support structure of the entire testing device. Its material is selected as high-strength metal material, such as high-quality carbon steel, and is made through precision machining and welding processes to ensure sufficient strength and stability, capable of bearing the weights of each device and the workpiece to be tested 9, as well as various acting forces generated during the testing process.

[0037] Referring toFigure 2 In Figure 2 , the slide rail 51 in the mode switching device 5 is installed on the frame 1. The mode switching device 5 includes a slide rail 51, a slider 52, a moving platform 53, and a mode switching driving member 54. The slide rail 51 adopts a high-precision linear guide rail, whose surface is quenched and ground, with high hardness and smooth surface, which can effectively reduce the friction when the slider 52 moves and ensure the moving accuracy. The slider 52 and the moving platform 53 are tightly connected by bolts to ensure no relative displacement between the two. The mode switching driving member 54 can be selected as a lead screw device, which can manually adjust to switch between manual and automatic test modes. Preferably, the driving mode of a servo motor with a ball screw is used. The servo motor can accurately control the rotation angle and speed, and the ball screw converts the rotational motion of the motor into the linear motion of the moving platform 53 to achieve precise switching between the automatic test device 6 and the manual test device 7. When automated batch testing is required, the mode switching driving member 54 drives the moving platform 53 to make the automatic test device 6 quickly and accurately correspond to the input force detection device 4; if manual debugging is required for special working conditions, the moving platform 53 is driven again to switch to the manual test device 7.

[0038] Refer to Figure 3 As shown in Figure 3 , the first fixed seat 61 of the automatic test device 6 is firmly installed on the frame 1. The automatic test device 6 includes a first fixed seat 61, a first lifting driving member 62, a first lifting seat 63, a first rotating shaft 64, a first angle rotating platform 65, a first angle adjusting driving member 66, a first power output unit 67, and a first transmission shaft 68. The first lifting driving member 62 adopts an electric lifting cylinder, and the push rod of the electric lifting cylinder is connected to the first lifting seat 63. By controlling the expansion and contraction of the electric lifting cylinder, the stable lifting of the first lifting seat 63 is realized, and its lifting accuracy can reach ±0.1 mm. The first angle adjusting driving member 66 can be a manual adjusting mechanism or a high-precision rotating motor. The motor shaft is connected to the first rotating shaft 64 to drive the first angle rotating platform 65 to adjust the angle, and the angle adjusting accuracy can reach ±0.5°. A front-back adjusting assembly 69 is provided on the first angle rotating platform 65, and the first power output unit 67 is arranged on the front-back adjusting assembly 69. The first transmission shaft 68 is driven by the front-back adjusting assembly 69 to move towards or away from the input force detection device 4, automatically completing the connection or separation with the input force detection device 4. Only after the front-back adjusting assembly 69 drives the first transmission shaft 68 to separate from the input force detection device 4 can the mode switching device 5 be started. The first driving motor in the first power output unit 67 is a variable-frequency motor, which can flexibly adjust the rotation speed according to the test requirements. The first reduction gear is a planetary reduction gear, which has the characteristics of high transmission efficiency, high precision, and large torque, and can amplify the output torque of the first driving motor and accurately transmit it to the first transmission shaft 68 to ensure that a stable and precise preset torque is applied to the workpiece 9 to be tested.

[0039] Refer to Figure 4, the second fixed seat 41 of the input force detection device 4 is also firmly installed on the frame 1. The input force detection device 4 includes a second fixed seat 41, a second lifting drive member 42, a second lifting seat 43, a second rotating shaft 44, a second angle rotating platform 45, a second angle adjustment drive member 46, a first mounting seat 47, a second transmission shaft 48, and a rotating wheel disc 49. The second fixed seat 41 is fixed to the frame 1 by anchor bolts to ensure its firm installation. The second lifting drive member 42 also uses an electric lifting screw module, similar to the first lifting drive member 62 of the automatic testing device 6, but according to the installation position and load requirements of the input force detection device 4, the parameters of the stepping motor are adjusted to make its output torque more suitable for this device. The second lifting seat 43 moves up and down relative to the second fixed seat 41 under the drive of the second lifting drive member 42. A second rotating shaft 44 is provided on the second lifting seat 43, and the second rotating shaft 44 is installed on the second lifting seat 43 through a deep groove ball bearing to ensure smooth rotation. The second angle rotating platform 45 is installed on the second rotating shaft 44. The second angle adjustment drive member 46 can be a manual adjustment mechanism or a stepping motor and gear transmission mechanism, which can realize the angle adjustment of the second angle rotating platform 45. The second angle adjustment drive member 46 drives the second angle rotating platform 45 to adjust the angle relative to the second lifting seat 43. A number of first mounting seats 47 are provided on the second angle rotating platform 45. In this embodiment, 3 first mounting seats 47 are provided. The first mounting seats 47 are made of aluminum alloy and are anodized to improve their corrosion resistance and surface hardness. A second transmission shaft 48 is rotatably provided on the first mounting seat 47. The second transmission shaft 48 is made of alloy steel and is quenched and tempered and surface hardened to improve its strength and wear resistance. One end of the second transmission shaft 48 is connected to the workpiece 9 to be tested through a special fixture to ensure stable torque transmission; the other end is connected to the first transmission shaft 68 of the automatic testing device 6 through a coupling. A rotating wheel disc 49 is provided at one end of the second transmission shaft 48 away from the product fixing device 3. The diameter of the rotating wheel disc 49 is 200 mm, and its surface is knurled to increase the friction between the operator's hand and the wheel disc, facilitating the application of torque during manual testing. An angle sensor is also installed on the rotating wheel disc 49, which can monitor the rotation angle of the rotating wheel disc 49 in real time and provide data support for manual testing.

[0040] Refer to Figure 5, the 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 a third fixed seat 31, a third lifting driving member 32, a third lifting seat 33, a third rotating shaft 34, a third angle rotating platform 35, a third angle adjusting driving member 36, and a second mounting seat 37. The third fixed seat 31 is installed on the frame 1 by means of welding and bolt connection to ensure its stability. The third lifting driving member 32 can adopt a hydraulic lifting cylinder, and 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 telescopic movement of the cylinder is 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 feedback-controlled by a high-precision displacement sensor. A third rotating shaft 34 is provided on the third lifting seat 33, and the third rotating shaft 34 is installed on the third lifting seat 33 through tapered roller bearings and can bear large axial and radial loads. The third angle rotating platform 35 is installed on the third rotating shaft 34, and the third angle adjusting driving member 36 can adopt a manual adjusting mechanism or an electric rotating table. The electric rotating table integrates a high-precision rotary encoder and a servo motor inside, and the servo motor is connected to the rotating table through a precision reduction gear to realize high-precision angle adjustment. The third angle adjusting driving member 36 drives the third angle rotating platform 35 to adjust the angle relative to the third lifting seat 33. A second mounting seat 37 is provided on the third angle rotating platform 35, and a replaceable fixture module is designed according to the shape and size of the workpiece 9 to be measured. The fixture module is connected to the second mounting seat 37 through positioning pins and bolts, and the replacement is convenient and fast. 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 adjusting driving member 36, and finally use the fixture to firmly fix the workpiece.

[0041] Refer to Figure 6, the rear-stage detection device 2 includes a fourth fixed seat 21, a fourth rotating shaft 22, a fourth angular rotation platform 23, a fourth angular adjustment driving member 24, a first power output unit 67, and a third transmission shaft 26. The fourth fixed seat 21 is fixed to the frame 1 by anchor bolts to ensure its firm installation. The fourth rotating shaft 22 is installed on the fourth fixed seat 21 through a spherical roller bearing and can adapt to certain installation errors and shafting deformations. The fourth angular rotation platform 23 is installed on the fourth rotating shaft 22, and the fourth angular adjustment driving member 24 can adopt a manual adjustment mechanism or an AC servo motor and a synchronous belt drive mechanism. The AC servo motor features high speed and high precision, and the synchronous belt drive mechanism has the advantages of smooth transmission, low noise, accurate transmission ratio, etc. The fourth angular adjustment driving member 24 drives the fourth angular rotation platform 23 to perform angular adjustment relative to the fourth fixed seat 21. The fourth angular rotation platform 23 is provided with a second power output unit 25 composed of a second driving motor and a second reduction gear, and a third transmission shaft 26 connected to the second power output unit 25. The second driving motor is a permanent magnet synchronous motor, and the second reduction gear adopts a harmonic reduction gear. The harmonic reduction gear has the advantages of high transmission ratio, high precision, and small volume. The second power output unit 25 provides stable and adjustable power for the third transmission shaft 26, and can accurately apply an appropriate load to the workpiece 9 to be measured, so as to more accurately monitor the output torque volatility and transmission efficiency of the workpiece 9 to be measured under torque input. A torque sensor and a speed sensor are installed on the third transmission shaft 26, which can accurately collect data in real time and transmit it to the control box 8.

[0042] Referring to Figure 8 , a basic process step of a power steering column with an intermediate shaft function test method: S101: Start the automatic calibration program of the control box 8: The operator clicks the "Start Automatic Calibration" button on the human-machine interface of the control box 8, and the control box 8 sends calibration instructions to the sensors, driving components, and detection units of each device. Each torque sensor, speed sensor, temperature and humidity sensor, etc. start to perform zero calibration and full-scale calibration. For example, the torque sensor is connected to a standard torque source, collects the output signal under the standard torque, compares it with the theoretical value, and calculates and stores the calibration coefficient. Each driving motor performs initialization positioning and returns to the preset initial position, such as the first lifting seat 63 and the first angular rotation platform 65 of the automatic test device 6, the second lifting seat 43 and the second angular rotation platform 45 of the input force detection device 4, etc., to ensure that the equipment is in the initial standard state.

[0043] S102: Collect ambient temperature and humidity data through the sensors set on the input force detection device 4 and the post-section detection device 2: The temperature and humidity sensors on the input force detection device 4 and the post-section detection device 2 are digital temperature and humidity sensors, which feature high precision and fast response. The sensors transmit the collected ambient temperature and humidity data to the signal processing module of the control box 8 through the RS485 communication interface. After preprocessing such as filtering and amplifying the data, the signal processing module transmits it to the central processor of the control box 8 for storage and analysis. The measurement accuracy of the temperature and humidity sensors is ±0.5°C for temperature and ±2%RH for humidity, which can accurately reflect the temperature and humidity changes in the test environment.

[0044] S103: Use the wavelet denoising algorithm to preprocess the original sensor data and eliminate the baseline offset of the sensors: The control box 8 uses the wavelet denoising algorithm to preprocess the original sensor data. First, select an appropriate wavelet basis function (such as the db4 wavelet) and the decomposition level (such as 4 levels) to perform wavelet decomposition on the temperature and humidity data, decomposing the data into approximation components and detail components of different scales. Then, perform threshold processing on the detail components to remove the noise components. Finally, through wavelet reconstruction, recombine the processed approximation components and detail components into the denoised temperature and humidity data, eliminate the baseline offset of the sensors, improve the quality of the data, and provide an accurate data basis for subsequent test analysis.

[0045] S104: Establish a temperature-humidity compensation coefficient matrix based on historical calibration data and store it in the non-volatile memory of the control box 8: The control box 8 retrieves a large amount of historical calibration data from the database. These data include test data under different temperature and humidity conditions and the corresponding error values. The control box 8 uses the 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 optimizing the historical data, obtain the temperature-humidity compensation coefficient matrix and store it in the non-volatile memory of the control box 8. For example, after analyzing 1500 groups 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].

[0046] S105: Apply 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 test device 6 and the second drive motor of the rear-stage detection device 2. The first drive motor and the second drive motor operate according to the preset torque curve and rotational speed, and apply a stable preset torque to the workpiece 9 to be tested 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 drive motor and the second drive motor gradually adjust the output torque so that the workpiece 9 to be tested bears a torque of 60 N·m. During the torque application process, the control box 8 monitors the torque and rotational speed of each drive shaft in real time to ensure stable and accurate torque application.

[0047] S106: Real-time collect the friction torque data of the second drive shaft 48 and the third drive shaft 26: High-precision friction torque sensors are installed on the second drive shaft 48 and the third drive shaft 26. The sensors real-time collect the friction torque data generated during the rotation of the drive shaft. The sensors transmit the collected data to the signal processing module of the control box 8 through the analog input module. After the signal processing module amplifies, filters, and processes the data, it transmits the data to the central processor of the control box 8 for storage and analysis. The measurement accuracy of the friction torque sensor is ±0.05 N·m, which can accurately capture the minute changes in the friction torque and provide accurate data support for the subsequent calculation of compensation parameters.

[0048] S107: Analyze the change trend of the friction torque with temperature based on the LSTM neural network model and dynamically generate compensation parameters: The control box 8 inputs the real-time collected friction torque data and temperature data into the pre-trained LSTM neural network model. The LSTM neural network model has been trained with a large amount of historical data and can learn the complex non-linear relationship between the friction torque and temperature. The model predicts the future change trend based on the input data and dynamically generates compensation parameters. For example, when the model predicts that the friction torque increases with the increase in temperature, it will generate corresponding positive compensation parameters to increase the output torque of the drive motor to offset the influence of the friction torque. The generation process of the compensation parameters is based on the in-depth analysis of the model on historical data and real-time data and can adapt to the changes under different test conditions.

[0049] S108: Send the compensation parameters to the first drive motor and the second drive motor to correct the torque output command: The control box 8 sends the generated compensation parameters to the controllers of the first drive motor and the second drive motor. The controller adjusts the output torque of the motor according to the compensation parameters to achieve dynamic and precise control of the torque output. For example, if the compensation parameter is +2 N·m, the controller will control the first drive motor and the second drive motor to increase the output torque by 2 N·m to ensure that the torque applied to the workpiece 9 to be measured always remains near the preset value. During the process of correcting the torque output command, the control box 8 continuously monitors the actual output value of the torque and adjusts the compensation parameters according to the feedback to form a closed-loop control to ensure the accuracy of the test.

[0050] Refer to Figure 9 , a test method for a power steering column with an intermediate shaft function is based on a workpiece adaptation adjustment step: S201: Input the relevant parameters of the workpiece 9 to be measured through the human-machine interface of the control box 8; S202: Automatically call the pre-stored three-dimensional adjustment model to calculate the required height adjustment amounts 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; S203: Perform height adjustment through the first lifting drive member 62, the second lifting drive member 42, and the third lifting drive member 32 according to the required height adjustment amounts; S204: Perform angle adjustment through the first angle adjustment drive member 66, the second angle adjustment drive member 46, the third angle adjustment drive member 36, and the fourth angle adjustment drive member 24 according to the corresponding angle compensation values.

[0051] Specifically, the operator inputs the relevant parameters of the workpiece 9 to be measured, such as length, diameter, installation angle, etc., through the human-machine interface of the control box 8. The control box 8 automatically calls the pre-stored three-dimensional adjustment model and calculates the required height adjustment amounts 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, according to the input workpiece parameters and the mechanical structure parameters of the equipment. The control box 8 sends control commands to the first lifting drive member 62, the second lifting drive member 42, the third lifting drive member 32, the first angle adjustment drive member 66, the second angle adjustment drive member 46, the third angle adjustment drive member 36, and the fourth angle adjustment drive member 24 according to the calculation results. Each drive member drives the corresponding component to perform height adjustment and angle adjustment according to the command, so that each device of the equipment can accurately adapt to the workpiece 9 to be measured, ensuring the accuracy and reliability of the test. During the adjustment process, the control box 8 monitors the motion state and position feedback of each drive member in real time to ensure that the adjustment actions are accurate and error-free.

[0052] Embodiment 2 In actual production, there are a wide variety of specifications for the power steering column with an intermediate shaft. When frequently replacing the workpiece 9 to be tested, the traditional manual recognition and installation methods are inefficient and error-prone. In response to this problem, this embodiment adds a multi-specification workpiece quick replacement and intelligent recognition system to the product fixing device 3 and the control box 8. On the second mounting seat 37 of the product fixing device 3, a set of intelligent fixture recognition and automatic replacement mechanism is added. The fixture module adopts a standardized design, and an electronic tag is installed on each fixture module, storing information such as the workpiece specifications and dimensions applicable to the fixture. When it is necessary to replace the workpiece 9 to be tested, the operator places the new fixture module on the second mounting seat 37, and the electronic tag reader on the mounting seat immediately reads the fixture information and transmits the data to the control box 8.

[0053] After receiving the fixture information, the control box 8 automatically calls the pre-stored test parameters and adjustment models for the corresponding workpiece. At the same time, the control box 8 obtains detailed information about the workpiece to be tested, including batch number, model, etc., by interacting with the material management system on the production line. In this way, most of the preparatory work before testing is completed by the control box 8 before the workpiece is installed on the equipment.

[0054] Based on the obtained information, the control box 8 automatically calculates and controls the height adjustment amounts 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, so that each device of the equipment is adjusted to a position adapted to the new workpiece in advance. After the workpiece is installed, the operator only needs to click the "Start Test" button on the human-machine interface of the control box 8, and the equipment can quickly start the test process, greatly shortening the workpiece replacement and test preparation time and improving the test efficiency.

[0055] Embodiment 3 In order to further improve the reliability and stability of the test equipment and reduce the downtime caused by equipment failures, this embodiment adds a fault diagnosis and predictive maintenance system. A variety of types of sensors, such as vibration sensors, temperature sensors, current sensors, etc., are added to the automatic test device 6, the input force detection device 4, the rear-section detection device 2, and each driving component. These sensors collect various data during the operation of the equipment in real time, including the vibration of the motor, the temperature change of the transmission shaft, and the current fluctuation of the driving motor.

[0056] The control box 8 incorporates a fault diagnosis algorithm based on deep learning. This algorithm performs real-time analysis on the collected sensor data. By comparing it with a pre-established normal operation data model, it can quickly and accurately determine whether there is a fault in the device, 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 characteristics such as the vibration frequency and amplitude to determine whether the fault is caused by bearing wear, shafting imbalance, or other reasons.

[0057] In addition to fault diagnosis, the system also has a predictive maintenance function. Through the analysis of historical sensor data and the training of machine learning algorithms, the system can predict the remaining service life of each component of the device. When the remaining service life of a certain component approaches the warning threshold, the control box 8 will send a warning message on the human-machine interface to remind the operator to perform maintenance or replace the component in a timely manner, avoiding sudden device failures and ensuring the continuity of the test work.

[0058] Example 4 In modern manufacturing, the need for remote monitoring and collaborative work is increasing. This example adds a remote monitoring and collaborative testing system, enabling the test equipment to achieve remote operation and multi-location collaborative testing. A remote monitoring platform based on cloud computing is built, and the control box 8 uploads information such as the real-time operation data and test results of the test equipment to the platform through the network. Operators can log in to the remote monitoring platform at any time and place through terminal devices such as computers and mobile phones to view the operation status of the equipment, the test progress, and real-time data charts. At the same time, the platform also supports video monitoring functions. Operators can observe the operation of the equipment in real time through cameras installed around the equipment.

[0059] The remote monitoring platform can not only monitor the device status but also has a remote operation function. When needed, operators can send control commands to the control box 8 through the platform to achieve remote control of the test equipment, such as starting or stopping the test, adjusting test parameters, switching test modes, etc. This function is particularly useful when the device fails. Technicians can perform fault troubleshooting and debugging remotely, reducing the time and cost of on-site maintenance.

[0060] For some complex test tasks, it may be necessary for test equipment at multiple locations to work collaboratively. The remote monitoring platform supports collaborative testing functions. Test equipment at different locations can share data and perform synchronous control through the platform. For example, when conducting an overall performance test of an automotive steering system, the power steering column with intermediate shaft test equipment located in different laboratories can conduct tests simultaneously and upload their respective test data to the platform for comprehensive analysis, improving the comprehensiveness and accuracy of the test.

[0061] Example 5 In order to better utilize test data and improve product quality, a system for in-depth analysis of test data and quality traceability is added in this embodiment. The control box 8 conducts in-depth analysis on a large amount of data collected during the test process. In addition to calculating conventional indicators such as output torque volatility and transmission efficiency, data mining and machine learning technologies are also used to conduct multi-dimensional analysis and mining on the data. For example, by performing cluster analysis on the test data of different batches of products, the differences in product performance and potential quality problems are identified; using the association rule mining algorithm, the association relationship between test parameters and product performance is analyzed to provide a basis for optimizing the test plan and product design.

[0062] A perfect quality traceability system is established, and the test data of each workpiece 9 to be tested is associated with information such as the production batch, production line, and raw materials of the product. When quality problems occur during the subsequent use of the product, the test data can be queried to quickly trace back to each link in the production process of the product, find out the possible causes of the quality problems, and facilitate the enterprise to carry out quality improvement and responsibility traceability.

[0063] The system automatically generates a visual test report based on the results of in-depth data analysis. The report displays the performance indicators, quality analysis results, and quality traceability information of the product in the form of charts, reports, etc., which is intuitive and clear, facilitating the viewing and analysis by enterprise management personnel and technical personnel, and providing strong support for the decision-making of the enterprise.

[0064] The embodiments of this specific implementation manner are all preferred embodiments of this application, and do not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. A power steering column with an intermediate shaft function test device, characterized in that, It includes a frame (1), on which a rear-section detection device (2), a product fixing device (3), an input force detection device (4) and a mode switching device (5) are successively arranged. An automatic testing device (6) and a manual testing device (7) are arranged on the mode switching device (5). Driven by the mode switching device (5), the automatic testing device (6) or the manual testing device (7) is arranged corresponding to the input force detection device (4). A control box (8) is also arranged on the frame (1) for coordinating the actions of each device and processing the detection data; the product fixing device (3) is used for fixing the workpiece to be tested (9), the input force detection device (4) fixes one end of the workpiece to be tested (9), and driven by the automatic testing device (6), the input force detection device (4) applies 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-section detection device (2) is connected to the other end of the workpiece to be tested (9) far away from the input force detection device (4) for monitoring the output torque volatility and transmission efficiency of the workpiece to be tested (9) under the input of torque.

2. The functional test device for a power steering column with an intermediate shaft according to claim 1, characterized in that The mode switching device (5) includes a slide rail (51) arranged on the frame (1), a slider (52) is arranged on the slide rail (51), a moving platform (53) is arranged on the slider (52), the automatic testing device (6) and the manual testing device (7) are arranged on the moving platform (53), and the moving platform (53) is connected with a mode switching driving part (54). Driven by the mode switching driving part (54), the automatic testing device (6) or the manual testing device (7) is arranged corresponding to the input force detection device (4).

3. A function test device for a power steering column with an intermediate shaft according to claim 1, characterized in that, The automatic testing device (6) includes a first fixing seat (61), a first lifting driving part (62) is arranged on the first fixing seat (61), a first lifting seat (63) is arranged on the first lifting driving part (62), and driven by the first lifting driving part (62), the first lifting seat (63) moves up and down relative to the first fixing seat (61); a first rotating shaft (64) is arranged on the first lifting seat (63), a first angle rotating platform (65) is arranged on the first rotating shaft (64), the first rotating shaft (64) is connected with a first angle adjusting driving part (66), and driven by the first angle adjusting driving part (66), the first angle rotating platform (65) adjusts the angle relative to the first lifting seat (63); a first power output unit (67) composed of a first driving motor and a first reduction mechanism and a first transmission shaft (68) connected with the first power output unit (67) are arranged on the first angle rotating platform (65).

4. The function test device for a power steering column with an intermediate shaft according to claim 1, characterized in that, The first-angle rotating platform (65) is provided with a front-back adjusting component (69), and the first power output unit (67) is arranged on the front-back adjusting component (69). The first transmission shaft (68) is driven by the front-back adjusting component (69) to move towards or away from the input force detection device (4), automatically completing the connection or separation from the input force detection device (4).

5. The functional test device for a power steering column with an intermediate shaft according to claim 1, wherein The input force detection device (4) includes a second fixed seat (41). A second lifting driving member (42) is arranged on the second fixed seat (41). A second lifting seat (43) is arranged on the second lifting driving member (42). The second lifting seat (43) is driven by the second lifting driving member (42) to perform a lifting movement relative to the second fixed seat (41). A second rotating shaft (44) is arranged on the second lifting seat (43). A second-angle rotating platform (45) is arranged on the second rotating shaft (44). The second rotating shaft (44) is connected to a second-angle adjusting driving member (46). The second-angle rotating platform (45) is driven by the second-angle adjusting driving member (46) to perform an angle adjustment relative to the second lifting seat (43). A plurality of first mounting seats (47) are arranged on the second-angle rotating platform (45). A second transmission shaft (48) is rotatably arranged on the first mounting seat (47). One end of the second transmission shaft (48) is connected to the workpiece to be measured (9), and the other end is connected to the automatic testing device (6).

6. The functional test device for a power steering column with an intermediate shaft according to claim 5, characterized in that A rotating wheel disc (49) is arranged at one end of the second transmission shaft (48) away from the product fixing device (3).

7. A function test device for a power steering column with an intermediate shaft according to claim 1, characterized in that, The product fixing device (3) includes a third fixed seat (31). A third lifting driving member (32) is arranged on the third fixed seat (31). A third lifting seat (33) is arranged on the third lifting driving member (32). The third lifting seat (33) is driven by the third lifting driving member (32) to perform a lifting movement relative to the third fixed seat (31). A third rotating shaft (34) is arranged on the third lifting seat (33). A third-angle rotating platform (35) is arranged on the third rotating shaft (34). The third rotating shaft (34) is connected to a third-angle adjusting driving member (36). The third-angle rotating platform (35) is driven by the third-angle adjusting driving member (36) to perform an angle adjustment relative to the third lifting seat (33). A second mounting seat (37) is arranged on the third-angle rotating platform (35) for fixedly installing the workpiece to be measured (9).

8. The function test device of a power steering column with an intermediate shaft according to claim 1, characterized in that, The rear-section detection device (2) includes a fourth fixed seat (21). A fourth rotating shaft (22) is provided on the fourth fixed seat (21). A fourth angular rotation platform (23) is provided on the fourth rotating shaft (22). The fourth rotating shaft (22) is connected to a fourth angular adjustment driving member (24). The fourth angular rotation platform (23) is driven by the fourth angular adjustment driving member (24) to perform angular adjustment relative to the fourth fixed seat (21). A second power output unit (25) composed of a second driving motor and a second speed reducer is provided on the fourth angular rotation platform (23), and a third transmission shaft (26) connected to the second power output unit (25).

9. A functional test method for a power steering column with an intermediate shaft, using the functional test device for a power steering column with an intermediate shaft according to any one of claims 1-8, characterized in that, It includes the following steps: Start the automatic calibration program of the control box (8); Collect ambient temperature and humidity data through the sensors provided in the input force detection device (4) and the rear-section detection device (2); Use the wavelet denoising algorithm to preprocess the original sensor data and eliminate the baseline shift of the sensor; Establish a temperature-humidity compensation coefficient matrix based on historical calibration data and store it in the non-volatile memory of the control box (8); Apply a preset torque by driving the second transmission shaft (48) and the third transmission shaft (26); Real-time collect the friction torque data of the second transmission shaft (48) and the third transmission shaft (26); Analyze the change trend of the friction torque with temperature based on the LSTM neural network model and dynamically generate compensation parameters; Send the compensation parameters to the first driving motor and the second driving motor to correct the torque output command.

10. A functional test method for a power steering column with an intermediate shaft according to claim 9, characterized in that, It also includes the following steps: Input relevant parameters of the workpiece to be measured (9) through the human-machine interface of the control box (8); Automatically call the pre-stored three-dimensional adjustment model to calculate the required height adjustment amounts 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); Execute height adjustment corresponding to the height adjustment amount through the first lifting driving member (62), the second lifting driving member (42) and the third lifting driving member (32); Execute angle adjustment corresponding to the angle compensation value through the first angular adjustment driving member (66), the second angular adjustment driving member (46), the third angular adjustment driving member (36) and the fourth angular adjustment driving member (24).

Images