Noise vibration automatic detection system and method for automobile horizontal seat driver gearbox

Abstract

The invention discloses a noise vibration automatic detection system and method for an automobile horizontal seat driver gearbox. Comprising a noise vibration detection module which performs noise vibration detection on a to-be-detected automobile horizontal seat driver gearbox in a sound insulation box body through a driving motor; the automatic picking module is used for clamping and moving the gear box; the machine vision camera is used for carrying out real-time positioning on the to-be-detected automobile horizontal seat driver gearbox according to the real-time image; the data processing module is used for detecting whether the to-be-detected automobile horizontal seat driver gearbox is qualified or not according to the noise signal and the vibration acceleration signal; and the control module is used for controlling the automatic picking module and the driving motor according to the real-time positioning result and the detection result. The system and the method have remarkable technical advantages and market application prospects, and can effectively meet the requirements of the modern automobile manufacturing industry.

Description

Technical Field

[0001] The invention relates to the field of automobile manufacturing, in particular to an automatic noise and vibration detection system and method for a gearbox of a horizontal seat drive of an automobile. Background Art

[0002] In the modern automobile manufacturing industry, as consumers' requirements for automobile comfort, safety and performance continue to increase, the design and manufacture of automobile seats have become more complex. The drive system of automobile seats, especially the performance of their gearboxes, directly affects the adjustment function, stability and durability of the seats. Therefore, ensuring the quality of gearboxes has become an important part of the automobile production process.

[0003] The gearbox is responsible for converting the motor's rotational motion into the seat's forward and backward, up and down adjustment. During its operation, the friction, meshing and movement between the gears will generate noise and vibration, which not only affects the seat's user experience, but may also cause wear and failure of components. Therefore, accurate detection of the gearbox's noise and vibration has become a key step in ensuring the quality of automotive seats.

[0004] At present, the traditional method of gearbox noise and vibration detection mainly relies on manual operation. This method usually involves manually installing the gearbox on the test bench, manually adjusting the motor and using professional equipment to measure noise and vibration. This method has several significant disadvantages:

[0005] 1. The manual inspection process is cumbersome and usually takes a long time to complete the inspection of each gearbox, limiting the overall efficiency of the production line;

[0006] 2. Since the testing process relies on manual operation, it may be affected by the operator's skill level and experience, resulting in inconsistency and inaccuracy in the test results;

[0007] 3. With the expansion of production scale, the cost of manual inspection continues to increase, especially in the case of large-scale production, the economic efficiency of manual inspection gradually decreases;

[0008] 4. In traditional methods, data recording and analysis are often performed manually, resulting in delayed data processing and inability to provide timely feedback on the quality status of the production line. Summary of the invention

[0009] In view of the shortcomings of the prior art such as inaccurate manual judgment, low automation and low efficiency, the present invention provides a noise and vibration automatic detection system and method for a horizontal seat drive gearbox of an automobile. The automatic detection system of the present invention is mainly used for quality control and detection of automobile parts, effectively improving the detection efficiency and detection accuracy.

[0010] The present invention is achieved through the following technical solutions:

[0011] 1. A noise and vibration automatic detection system for the gearbox of the horizontal seat drive of an automobile

[0012] The noise and vibration automatic detection system comprises:

[0013] The first conveyor belt is used to convey the automotive horizontal seat drive gearbox to be tested and the qualified gearbox;

[0014] A second conveyor belt, arranged on one side of the first conveyor belt, for conveying unqualified gear boxes;

[0015] A noise and vibration detection module is arranged between the first conveyor belt and the second conveyor belt, and is used to perform noise and vibration detection on the gearbox of the horizontal seat driver of the vehicle to be detected; it comprises a soundproof box, a drive motor and a microphone, wherein the drive motor is arranged outside the soundproof box, the gearbox of the horizontal seat driver of the vehicle to be detected is accommodated inside the soundproof box, and a microphone is installed inside the soundproof box, and the microphone is located above the gearbox of the horizontal seat driver of the vehicle to be detected, and is used to collect noise signals in real time during the operation of the gearbox of the horizontal seat driver of the vehicle to be detected; specifically, the microphone is installed on the top inner wall of the soundproof box;

[0016] The automatic picking module is arranged between the first conveyor belt and the second conveyor belt, and is used to clamp and move the gear box, thereby ensuring the stability of the gear box during the detection process; a box cover and a clamp are installed at the end, and the clamp is used to clamp the gear box during the movement and detection process. An acceleration sensor is installed on the clamp to collect the vibration acceleration signal of the horizontal seat drive gear box of the vehicle to be detected during operation in real time;

[0017] A machine vision camera is installed at the end of the automatic picking module to collect real-time images, and locate the horizontal seat drive gearbox of the vehicle to be inspected in real time according to the real-time images to obtain real-time positioning results;

[0018] The data processing module has an input end which is respectively connected to the microphone and the acceleration sensor for communication, and is used to receive the noise signal and the vibration acceleration signal, and detect whether the gearbox of the horizontal seat drive of the vehicle to be tested is qualified according to the noise signal and the vibration acceleration signal, and obtain the test result;

[0019] The control module has an input end which is respectively connected to the machine vision camera and the output end of the data processing module for communication, and is used for receiving real-time positioning results and detection results; and an output end which is respectively connected to the automatic picking module and the driving motor for controlling the automatic picking module and the driving motor according to the real-time positioning results and the detection results.

[0020] The noise and vibration detection module also includes a detection workbench and a transmission shaft; the soundproof box and the drive motor are both installed on the detection workbench, the drive motor is arranged on a side of the soundproof box away from the automatic pickup module (6), the output shaft of the drive motor passes through the side wall of the soundproof box, and is connected to the horizontal seat drive gearbox of the vehicle to be detected through the transmission shaft; the soundproof box has an opening on the side close to the automatic pickup module, the opening is engaged with the box cover and the edges are tightly fitted to ensure the sound insulation effect during the detection process; the inner wall surface of the soundproof box is provided with a corrugated sound absorbing material to reduce the interference of external noise on the detection result; the drive motor has speed regulation and reversing functions, and the control module controls the speed and direction of the drive motor.

[0021] Specifically, the driving motor is fixedly connected to the detection workbench through a motor bracket.

[0022] The first conveyor belt is provided with a station to be inspected and a station for loading a sample of a qualified gearbox; the second conveyor belt is provided with a station for loading a sample of an unqualified gearbox; the station to be inspected, the station for loading a sample of a qualified gearbox, the station for loading a sample of an unqualified gearbox and the soundproof box are all located within the working radius of the automatic picking module; the control module controls the automatic picking module to move the automobile horizontal seat driver gearbox to be inspected from the station to be inspected to the soundproof box according to the real-time positioning result, and at the same time embeds the box cover into the opening of the soundproof box until the inspection is completed; the control module controls the automatic picking module to transfer the qualified gearbox from the soundproof box to the sampling station for the qualified gearbox on the first conveyor belt, and to transfer the unqualified gearbox from the soundproof box to the sampling station for the unqualified gearbox on the second conveyor belt according to the inspection result.

[0023] Specifically, the station to be inspected and the station for loading qualified gearboxes are both located in the middle of the first conveyor belt, and the first conveyor belt is used to transport the automobile horizontal seat drive gearbox to be inspected from the head end to the station to be inspected, and to transport the qualified gearbox from the station for loading qualified gearboxes to the end of the first conveyor belt. Preferably, the inspection workbench is fixedly connected to the first conveyor belt.

[0024] The automatic detection system also includes a clamping workbench, and an automatic picking module is installed on the top surface of the clamping workbench; the automatic picking module adopts a six-servo mechanical arm, the head end of the six-servo mechanical arm is fixedly connected to the clamping workbench, and the tail end is fixedly connected to the box cover and the clamp respectively, and the six-servo mechanical arm is electrically connected to the control module.

[0025] The six-servo mechanical arm comprises a boom, a forearm and six servos, each of which is electrically connected to and controlled by a control module, and the six servos are respectively a first servo, a second servo, a third servo, a fourth servo, a fifth servo and a sixth servo; the fixed end of the first servo is installed on a clamping workbench, the rotating end of the first servo is connected to the head end of the boom by transmission, and drives the boom to rotate in all directions on the clamping workbench; the second servo and the third servo are connected to the two ends of a horizontal rotating shaft arranged at the end of the boom by transmission, and drive the boom to rotate around the horizontal rotating shaft within a range of 0 to 180 degrees; the boom and the forearm are connected end to end through a horizontal connecting shaft, the fourth servo is connected to the horizontal connecting shaft by transmission, and drives the forearm to rotate around the horizontal connecting shaft within a range of 0 to 180 degrees; the fifth servo is connected to the end of the forearm and the end of the clamp by transmission, and controls the up and down pitch clamping angles of the clamp; the sixth servo is connected to the clamp by transmission, and controls the opening and closing of the clamp.

[0026] The first conveyor belt and the second conveyor belt are arranged in parallel, the inspection workbench and the clamping workbench are arranged at intervals and are both fixedly installed on the ground between the first conveyor belt and the second conveyor belt, the clamping workbench is located at the rear side of the inspection workbench in the conveying direction of the first conveyor belt, and the qualified gear box loading station is located downstream of the station to be inspected.

[0027] The transmission shaft is a special flexible shaft for the horizontal seat driver of the automobile. The end of the transmission shaft away from the driving motor is connected to the gear box through the worm jack of the gear box.

[0028] 2. A noise and vibration automatic detection method for a gearbox of a horizontal seat drive of an automobile using the noise and vibration automatic detection system

[0029] The noise vibration automatic detection method comprises the following steps:

[0030] S1) conveying the horizontal seat drive gearbox of the automobile to be inspected from the head end of the first conveyor belt to the station to be inspected;

[0031] S2) using a machine vision camera to collect a real-time image of the horizontal seat drive gearbox of the vehicle to be inspected on the first conveyor belt and judging whether the horizontal seat drive gearbox of the vehicle to be inspected is conveyed to the station to be inspected according to the real-time image, and obtaining a real-time positioning result;

[0032] S3) After the machine vision camera detects that the horizontal seat drive gearbox of the automobile to be tested is transferred to the station to be tested, the control module is used to control the fixture to clamp the horizontal seat drive gearbox of the automobile to be tested according to the real-time positioning result, and the automatic picking module is controlled to align the box cover with the opening of the soundproof box body, and then the worm jack of the horizontal seat drive gearbox of the automobile to be tested is sleeved on the outside of the end of the transmission shaft away from the drive motor, and the box cover is embedded in the opening of the soundproof box body, so that the detection gearbox is moved from the station to be tested into the soundproof box body;

[0033] The drive motor is in communication with the control module, and the control module controls the speed of the drive motor in the following manner:

[0034] The control module controls the driving motor to rotate at a speed of 10 r / min to match the transmission shaft with the shaft hole of the gearbox of the horizontal seat drive of the vehicle to be tested;

[0035] The control module controls the drive motor to rotate at a preset detection speed of 3000r / min for a preset detection time;

[0036] S4) using the control module to control the drive motor to drive the gearbox of the horizontal seat driver of the vehicle to be tested to run according to the preset detection speed and the preset detection time, driving the detection gearbox to run, using the microphone and the acceleration sensor to respectively collect the noise signal and the vibration acceleration signal of the gearbox of the horizontal seat driver of the vehicle to be tested during the operation, and the data processing module detects the noise and vibration of the gearbox of the horizontal seat driver of the vehicle to be tested according to the received noise signal and the vibration acceleration signal, and determines whether the gearbox of the horizontal seat driver of the vehicle to be tested is qualified, and obtains the fault type judgment result as the detection result; in this process, using the automatic picking module to keep the box cover embedded in the opening of the sound insulation box;

[0037] In the step S4), the detection process is specifically as follows: using an infinite impulse response (IIR) filter to filter the received signal, extracting features from the filtered signal, combining the features extracted from the same filtered signal into a corresponding feature vector, and inputting the feature vectors corresponding to all filtered signals into a pre-trained classification model to obtain a detection result; the feature vector is mainly composed of time domain features, frequency domain features and time-frequency features;

[0038] S5) using the control module to control the automatic picking module according to the detection result to transfer the qualified gear box from the soundproof box to the qualified gear box loading station on the first conveyor belt, and the first conveyor belt conveys the qualified gear box to the next process, or transfers the unqualified gear box from the soundproof box to the unqualified gear box loading station on the second conveyor belt for rework;

[0039] S6) Repeat steps S2 to S5 until the operation is completed.

[0040] The beneficial effects of the present invention are as follows:

[0041] 1. The automatic detection system of the present invention can improve the noise and vibration detection of the gearbox, and the automatic detection device can quickly complete the detection of the noise and vibration of the gearbox, significantly reducing the detection time. Compared with the traditional manual detection method, the efficiency can be improved by more than 80%;

[0042] 2. The automatic detection system of the present invention can reduce human errors. Through automated operation, it avoids errors that may occur in manual detection and improves the consistency and reliability of the detection results.

[0043] 3. The automatic detection system of the present invention can monitor the status of the gearbox in real time through real-time monitoring and data analysis. The sensor equipped in the device can instantly transmit the data to the computing device for analysis, quickly feedback the quality status of the production line, and facilitate timely adjustment of the production process;

[0044] 4. The automatic detection system of the present invention optimizes the production process. Through the cooperation of the conveyor belt and the automatic picking module, the entire detection process is highly automated, which reduces manual intervention and improves the overall efficiency and safety of the production line;

[0045] 5. The automatic detection system of the present invention has strong adaptability. The detection device can collect different types of gearboxes, train and replace different gearbox fault judgment models, and is suitable for the detection needs of various automobile seat drives. It has good versatility; it supports intelligent manufacturing. The present invention is combined with the concept of Industry 4.0 and can be integrated with other production management systems to realize intelligent data management and promote technological progress in the automobile manufacturing industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is an overall schematic diagram of the automatic detection system of the present invention;

[0047] Figure 2 It is a top cross-sectional view of a noise and vibration detection module in the automatic detection system of the present invention;

[0048] Figure 3 It is a schematic diagram of the automatic picking module in the automatic detection system of the present invention.

[0049] Among them, 1. drive motor, 2. sound insulation box, 3. servo, 4. multi-degree-of-freedom robotic arm, 5. box cover, 6. automatic picking module, 7. first conveyor belt, 8. clamping workbench, 9. testing workbench, 10. corrugated sound-absorbing material, 11. microphone, 12. transmission shaft, 13. motor bracket, 14. horizontal seat drive gearbox of the car to be tested, 15. second servo, 16. third servo, 17. fourth servo, 18. fourth servo, 19. fifth servo, 20. sixth servo, 21. second conveyor belt, 22. upper arm, 23. lower arm, 24. fixture, 25. acceleration sensor. DETAILED DESCRIPTION

[0050] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the drawings in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this application, not all of them.

[0051] In the description of the embodiments of the present application, words such as "for example" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "for example" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "for example" or "for example" is intended to present related concepts in a specific way.

[0052] In the description of the embodiments of the present application, the meaning of the term "multiple" refers to two or more. For example, multiple systems refer to two or more systems, and multiple screen terminals refer to two or more screen terminals. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. The terms "include", "comprise", "have" and their variations all mean "including but not limited to", unless otherwise specifically emphasized.

[0053] A first aspect of the present invention provides a noise and vibration automatic detection system for a gearbox of a horizontal seat drive of an automobile.

[0054] like Figure 1 As shown, the noise and vibration automatic detection system of the present invention comprises:

[0055] The first conveyor belt 7 is used to convey the automotive horizontal seat drive gearbox 14 to be tested and the qualified gearbox; the first conveyor belt 7 adopts an efficient drive system, which can quickly and smoothly convey the gearbox. The speed of the conveyor belt can be adjusted according to production requirements to ensure efficient operation under different production rhythms;

[0056] The second conveyor belt 21 is arranged on one side of the first conveyor belt 7 and is used to convey unqualified gearboxes;

[0057] The noise and vibration detection module is arranged between the first conveyor belt 7 and the second conveyor belt 21, and is used to perform noise and vibration detection on the horizontal seat driver gearbox 14 of the vehicle to be detected; it includes a soundproof box 2, a drive motor 1 and a microphone 11, the drive motor 1 is arranged outside the soundproof box 2, and the soundproof box 2 contains the horizontal seat driver gearbox 14 of the vehicle to be detected; the microphone 11 is installed in the soundproof box 2, and is used to collect the noise signal of the horizontal seat driver gearbox 14 of the vehicle to be detected in real time during the operation process; Figure 2 As shown, the microphone 11 can be installed on the top inner wall of the soundproof box 2;

[0058] The automatic picking module 6 is arranged between the first conveyor belt 7 and the second conveyor belt 21, and is used to clamp and move the gear box, thereby ensuring the stability of the gear box during the detection process; the end is equipped with a box cover 5 and a clamp 24, and the clamp 24 is used to clamp the gear box during the movement and detection process to ensure the stability of the gear box during the detection process; the acceleration sensor 25 is installed on the clamp 24, and is used to collect the vibration acceleration signal of the horizontal seat drive gear box 14 of the vehicle to be detected during operation in real time;

[0059] A machine vision camera is installed at the end of the automatic picking module 6, and is used to collect real-time images, and to perform real-time positioning of the horizontal seat drive gearbox 14 of the vehicle to be inspected according to the real-time images through an image processing algorithm to obtain a real-time positioning result;

[0060] The data processing module, the input end of which is respectively connected to the microphone 11 and the acceleration sensor 25 for communication, is used to receive the noise signal and the vibration acceleration signal respectively, and detect whether the horizontal seat drive gearbox 14 of the vehicle to be tested is qualified according to the noise signal and the vibration acceleration signal, and obtain the test result. In this module, the data processing module can use a computing device, and the microphone 11 and the acceleration sensor 25 can monitor the status of the gearbox in real time. These collected sensor signals can be instantly transmitted to the computing device for analysis, and the quality status of the production line can be quickly fed back, so as to facilitate timely adjustment of the production process;

[0061] In machine vision cameras, high-resolution image sensors and image processing algorithms can quickly identify the position and status of the gearbox.

[0062] The control module, whose input end is in communication connection with the output end of the data processing module, is used to receive the real-time positioning result and the detection result; and whose output end is respectively electrically connected with the automatic picking module 6 and the driving motor 1, is used to control the automatic picking module 6 according to the real-time positioning result and the detection result, and control the driving motor 1 according to the real-time positioning result and the detection result. The control module can automatically adjust the motion trajectory of the automatic picking module 6 according to the real-time positioning result, so as to ensure the accurate positioning of the gearbox before the detection.

[0063] Specifically, the noise and vibration detection module also includes a detection workbench 9 and a transmission shaft 12. The soundproof box 2 and the drive motor 1 are both installed on the detection workbench 9. The output shaft of the drive motor 1 passes through the side wall of the soundproof box 2 and is connected to the horizontal seat drive gearbox 14 of the vehicle to be detected through the transmission shaft 12. The detection workbench 9 can provide a stable detection platform. The detection workbench 9 can further be installed with multiple high-sensitivity sensors to monitor the status of the gearbox in real time, and monitor the noise and vibration data of the gearbox in real time. These data are transmitted to the tester for analysis to ensure the accuracy and reliability of the test results.

[0064] Furthermore, the design of the soundproof box 12 takes into account airflow and heat dissipation, ensuring that the performance of the device will not be affected by overheating during a long period of testing.

[0065] Furthermore, the soundproof box 2 has an opening on one side close to the automatic picking module 6, which is engaged with the box cover 5 and fits tightly at the edge to ensure the soundproof effect during the detection process; the inner wall surface of the soundproof box 2 is provided with a corrugated sound-absorbing material 10 to reduce the interference of external noise on the detection results. Through the cooperation of the automatic picking module 6 and the soundproof box 2, the process of sealing the soundproof box 2 and moving the gear box is carried out simultaneously, which not only realizes a high degree of automation and reduces manual intervention, but also improves the overall efficiency and safety of the production line.

[0066] Furthermore, the drive motor 1 may be a servo motor having speed regulation and direction-changing functions, and the control module controls the speed and direction of the drive motor 1 according to the control process sequence.

[0067] Furthermore, the driving motor 1 is fixedly connected to the detection workbench 9 via a motor bracket 13 .

[0068] Specifically, the first conveyor belt 7 is provided with a station to be inspected and a station for loading a sample of a qualified gearbox. The second conveyor belt 21 is provided with a station for loading a sample of an unqualified gearbox. The station to be inspected, the station for loading a sample of a qualified gearbox, the station for loading a sample of an unqualified gearbox and the soundproof box 2 are all located within the working radius of the automatic picking module 6. The control module controls the automatic picking module 6 to move the horizontal seat driver gearbox 14 of the automobile to be inspected from the station to be inspected to the soundproof box 2 according to the real-time positioning result, and at the same time, embeds the box cover 5 into the opening of the soundproof box 2 until the inspection is completed. The control module controls the automatic picking module 6 to transfer the qualified gearbox from the soundproof box 2 to the qualified gearbox loading station of the first conveyor belt 7 according to the inspection result, and transfers the unqualified gearbox from the soundproof box 2 to the unqualified gearbox loading station on the second conveyor belt 21.

[0069] Specifically, the automatic detection system further includes a clamping workbench 8 , and an automatic picking module 6 is installed on the top surface of the clamping workbench 8 .

[0070] like Figure 3 As shown, the station to be inspected and the station for loading qualified gearboxes are both located in the middle of the first conveyor belt 7. The first conveyor belt 7 is used to convey the automobile horizontal seat drive gearbox 14 to be inspected from the head end to the station to be inspected, and to convey the qualified gearbox from the station for loading qualified gearboxes to the end of the first conveyor belt 7. Preferably, the inspection workbench 9 is fixedly connected to the first conveyor belt 7.

[0071] Furthermore, the first conveyor belt 7 and the second conveyor belt 21 are arranged in parallel, the detection workbench 9 and the clamping workbench 8 are arranged at intervals, and are both fixedly installed on the ground between the first conveyor belt 7 and the second conveyor belt 21, the clamping workbench 8 is located at the rear side of the detection workbench 9 in the conveying direction of the first conveyor belt 7, and the qualified gearbox loading station is located downstream of the station to be detected. The automatic detection system of the present invention can further improve the detection efficiency by improving the coordination between the conveyor belt and the automatic picking module through reasonable layout.

[0072] Furthermore, if Figure 3 As shown, the automatic picking module 6 adopts a six-servo mechanical arm. By introducing the automatic picking module 6, human errors can be reduced. Through automated operation, errors that may occur in manual detection are avoided, and the consistency and reliability of the detection results are improved; the six-servo mechanical arm is mainly composed of a multi-degree-of-freedom mechanical arm 4 and a servo 3. The head end of the multi-degree-of-freedom mechanical arm 4 is fixedly connected to the clamping workbench 8, and the end is fixedly connected to the box cover 5 and the fixture 24 respectively. The six-servo mechanical arm is electrically connected to the control module. The design of the multi-degree-of-freedom mechanical arm 4 adopts a multi-degree-of-freedom structure, which can move flexibly in three-dimensional space.

[0073] In the six-servo mechanical arm, the multi-degree-of-freedom mechanical arm 4 is mainly composed of a large arm 22 and a small arm 23. The number of the servos 3 is six, and the six servos 3 respectively control different movements of the multi-degree-of-freedom mechanical arm 4 to ensure that various types of gearboxes can be accurately clamped. Each servo 3 is electrically connected to the control module and controlled by the control module. The six servos 3 are respectively the first servo 17, the second servo 15, the third servo 16, the fourth servo 18, the fifth servo 19 and the sixth servo 20. The fixed end of the first steering gear 17 is installed on the clamping workbench 8, and the rotating end of the first steering gear 17 is transmission-connected with the head end of the boom 22, and drives the boom 22 to rotate in all directions on the clamping workbench 8; the second steering gear 15 and the third steering gear 16 are transmission-connected with the two ends of the horizontal rotating shaft arranged at the end of the boom 22, respectively, and drive the boom 22 to rotate around the horizontal rotating shaft within the range of 0 to 180 degrees; the boom 22 and the arm 23 are connected end to end through a horizontal connecting shaft, and the fourth steering gear 18 is transmission-connected with the horizontal connecting shaft, and drives the arm 23 to rotate around the horizontal connecting shaft within the range of 0 to 180 degrees; the fifth steering gear 19 is transmission-connected with the end of the arm 23 and the end of the clamp 24, and controls the pitch clamping angle of the clamp 24; the sixth steering gear 20 is transmission-connected with the clamp 24, and controls the opening and closing of the clamp 24.

[0074] Furthermore, the automatic picking module 6 is also equipped with a force feedback sensor, which can monitor the clamping force in real time to prevent damage to the gearbox.

[0075] Furthermore, the transmission shaft 12 is a dedicated flexible shaft for the automobile horizontal seat driver, and one end of the transmission shaft 12 away from the driving motor 1 is connected to the gear box by inserting into the worm socket of the gear box.

[0076] 2. The second aspect of the present invention provides a method for automatically detecting noise and vibration of a gearbox of a horizontal seat drive of an automobile using the above-mentioned automatic noise and vibration detection system. Specifically, the method comprises the following steps:

[0077] S1) conveying the horizontal seat drive gearbox 14 of the automobile to be inspected from the head end of the first conveyor belt 7 to the station to be inspected;

[0078] S2) using a machine vision camera to collect a real-time image of the horizontal seat driver gearbox 14 of the vehicle to be inspected on the first conveyor belt 7, and using an image processing method to obtain the position and / or posture of the horizontal seat driver gearbox 14 of the vehicle to be inspected according to the real-time image, and then judging whether the horizontal seat driver gearbox 14 of the vehicle to be inspected is conveyed to the station to be inspected, and obtaining a real-time positioning result;

[0079] During this process, the machine vision camera can automatically adjust the motion trajectory of the automatic picking module 6 according to the posture information of the horizontal seat drive gearbox 14 of the vehicle to be inspected, ensuring the accurate positioning of the gearbox before inspection;

[0080] S3) After the machine vision camera detects that the horizontal seat driver gearbox 14 of the vehicle to be inspected is transferred to the inspection station, the control module receives and controls the fixture 24 to clamp the horizontal seat driver gearbox 14 of the vehicle to be inspected according to the real-time positioning result, controls the automatic picking module 6 to align the box cover 5 with the opening of the soundproof box 2, and then sets the worm jack of the horizontal seat driver gearbox 14 of the vehicle to be inspected on the outside of the end of the transmission shaft 12 away from the drive motor 1, and embeds the box cover 5 into the opening of the soundproof box 2, so that the detection gearbox is moved from the inspection station to the soundproof box 2;

[0081] S4) using the control module to control the drive motor 1 to drive the horizontal seat driver gearbox 14 of the vehicle to be tested to run at a preset detection speed and a preset detection time, driving the detection gearbox to run for noise and vibration detection, using the microphone 11 and the acceleration sensor 25 to respectively collect the noise signal and the vibration acceleration signal of the horizontal seat driver gearbox 14 of the vehicle to be tested during the operation and transmit them to the data processing module, the data processing module detects the noise and vibration of the horizontal seat driver gearbox 14 of the vehicle to be tested according to the received noise signal and vibration acceleration signal, and determines whether the horizontal seat driver gearbox 14 of the vehicle to be tested is qualified;

[0082] In step S4), according to the analysis results, the control module automatically adjusts the speed and direction of the drive motor 1 to optimize the subsequent detection. The specific process is: the drive motor 1 is connected to the control module. After the driver gearbox of the car seat to be tested arrives at the station to be tested, the control module controls the drive motor 1 to rotate at a speed of 10r / min to match the flexible shaft with the shaft hole of the horizontal seat driver gearbox 14 of the car to be tested. After the shaft hole is matched, the control module controls the drive motor to rotate at a speed of 3000r / min (preset detection speed) for 2s (preset detection time).

[0083] In step S4), the process of detecting the noise vibration of the horizontal seat drive gearbox 14 of the detected automobile is specifically as follows: using an infinite impulse response (IIR) filter to filter the received signal, extracting features from the filtered signal, combining the features extracted from the same filtered signal into a corresponding feature vector, and inputting the feature vectors corresponding to all filtered signals into a pre-trained classification model to obtain a detection result; the feature vector is mainly composed of time domain features, frequency domain features and time-frequency features.

[0084] S5) The control module controls the automatic picking module 6 to transfer the qualified gear box from the soundproof box 2 to the qualified gear box loading station on the first conveyor belt 7 according to the received detection result, and the first conveyor belt 7 conveys the qualified gear box to the next process, or transfers the unqualified gear box from the soundproof box 2 to the unqualified gear box loading station on the second conveyor belt 21 for rework;

[0085] S6) Repeat steps S2 to S5 until the operation is completed.

[0086] The specific embodiments of the present invention are as follows:

[0087] In this embodiment, the drive motor 1 is a servo motor with a rated power of 500W and an adjustable speed range of 0 to 3000RPM, which can automatically adjust the speed and direction according to the detection requirements. The motor control system is combined with real-time feedback of sensor data to ensure that the best working state is always maintained during the detection process.

[0088] In order to reduce the interference of external noise on the test results, the design of the soundproof box 2 adopts a pine wood structure shell, filled with corrugated sound absorbing material 10, and has a size of 500mm×500mm×500mm. The use of pine wood box also ensures that the performance of the equipment will not be affected by overheating during the long-term test process, and the sound absorption performance of the wooden box is excellent, so as to ensure that the sound insulation effect and reverberation suppression achieve good results.

[0089] The automatic pick-up module 6 consists of a multi-degree-of-freedom robot arm 4 and six steering gears 3, which can flexibly move and clamp gearboxes of different models. The multi-degree-of-freedom design of the multi-degree-of-freedom robot arm 4 ensures its flexibility in three-dimensional space, and each steering gear 3 controls the different movements of the multi-degree-of-freedom robot arm 4. In addition, the automatic pick-up module 6 is also equipped with a force feedback sensor to monitor the clamping force in real time to prevent damage to the gearbox.

[0090] The control conditions of the six servos are as follows: the first servo 17 controls the entire robotic arm to rotate 360° on the workbench; the second servo 15 and the third servo 16 control the upper arm 22 of the robotic arm to rotate 180° around the drive shafts of the second servo 15 and the third servo 16; the fourth servo 18 controls the lower arm 23 of the robotic arm to rotate 180° around the drive shaft of the fourth servo 18; the fifth servo 19 controls the clamping angle of the fixture 24; and the sixth servo 20 controls the clamping and release of the fixture 24.

[0091] The machine vision camera is installed on the automatic picking module 6 and is equipped with a high-resolution image sensor and image processing algorithm, which can quickly identify the position and status of the gearbox and ensure that it is accurately placed in the inspection position.

[0092] The conveyor belt 7 is connected to the testing workbench 9 and adopts an efficient driving system, which can transport the gearbox quickly and smoothly, and its speed can be adjusted according to production requirements.

[0093] When the machine vision camera detects that the gearbox has arrived at the inspection station, it sends a signal to the industrial computer, which instructs the PLC to control the robotic arm to grab the gearbox for inspection and sorting.

[0094] The inspection station uses Zhaohua's CRY341 quarter-inch high-performance microphone to collect the acoustic signal during the operation of the gearbox, and installs a Kangtai ULT2001 acceleration sensor on the robotic arm fixture to collect the vibration acceleration signal during the operation of the gearbox. The sensor transmits the signal to the Qichuang Mofei MPS-HD2404 data acquisition card via a data cable and uploads it to the industrial computer for judgment.

[0095] The method of use includes several steps. First, the gearbox to be tested is transported to the testing workbench 9 via the conveyor belt 7. Next, the gearbox is positioned using a machine vision camera to ensure that it is accurately placed. Then, the automatic picking module 6 clamps the gearbox and moves it into the soundproof box 2. After starting the drive motor 1, the gearbox will be tested for noise and vibration in the soundproof box 2 to reduce external interference.

[0096] During the detection process, the noise and vibration acceleration data of the gearbox are monitored in real time through sensors, and the data is transmitted to the industrial computer for analysis. First, the collected vibration signal and acceleration signal are filtered through an IIR filter, and then the filtered signal is feature extracted. The extracted features include time domain features, frequency domain features, and time-frequency features. After feature extraction, the feature vector is obtained, and the feature vector is input into the trained classification algorithm model to obtain the judgment result of whether the horizontal seat drive gearbox of the automobile is qualified.

[0097] After obtaining the judgment result, the industrial computer sends a command to the Mitsubishi FX3U-64MT / ES-A model PLC through MODBUS, controlling the robotic arm servo to move the qualified automobile horizontal seat drive gearbox back to the first conveyor belt 7 according to the judgment result, and transport it to the next process, and move the unqualified automobile horizontal seat drive gearbox to the second conveyor belt 21 for rework.

[0098] In order to ensure the efficient operation of the equipment, all components need to be maintained regularly, especially sensors and motors. In addition, the sealing of the soundproof box 2 should be checked regularly during operation to prevent external noise from interfering with the test results. Through the above implementation scheme, the automatic detection system can efficiently and accurately complete the noise and vibration detection of the gearbox, supporting the continuity of the production line.

[0099] Compared with the traditional manual detection method, the detection efficiency of the detection system and method of this embodiment is improved by more than 80%.

[0100] In summary, the present invention provides an efficient and accurate automatic noise and vibration detection system for a vehicle horizontal seat drive gearbox and a method of using the system, which has significant technical advantages and market application prospects and can effectively meet the needs of the modern automobile manufacturing industry.

[0101] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0102] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An automatic noise and vibration detection system for a gearbox of a horizontal seat drive of an automobile, characterized in that: include: A first conveyor belt (7); A second conveyor belt (21); A noise vibration detection module is arranged between the first conveyor belt (7) and the second conveyor belt (21), comprising a soundproof box (2), a drive motor (1) and a microphone (11), wherein the drive motor (1) is arranged outside the soundproof box (2), and the microphone (11) is installed inside the soundproof box (2); An automatic picking module (6) is arranged between the first conveyor belt (7) and the second conveyor belt (21), and a box cover (5) and a clamp (24) are installed at the end thereof, and an acceleration sensor (25) is installed on the clamp (24); A machine vision camera mounted at the end of the automatic picking module (6); A data processing module, the input end of which is respectively communicatively connected to a microphone (11) and an acceleration sensor (25); The control module has an input end which is respectively in communication with the machine vision camera and the output end of the data processing module; and an output end which is respectively electrically connected with the automatic picking module (6) and the driving motor (1).

2. The noise and vibration automatic detection system for the gearbox of the horizontal seat drive of the automobile according to claim 1 is characterized in that: The noise vibration detection module also includes a detection workbench (9) and a transmission shaft (12); the soundproof box (2) and the drive motor (1) are both mounted on the detection workbench (9); the output shaft of the drive motor (1) passes through the side wall of the soundproof box (2) and is then connected to a drive gearbox (14) of a horizontal seat of a vehicle to be detected through the transmission shaft (12); one side of the soundproof box (2) has an opening, which is engaged with the box cover (5); and a corrugated sound-absorbing material (10) is provided on the inner wall surface of the soundproof box (2).

3. The noise and vibration automatic detection system for the gearbox of the horizontal seat drive of the automobile according to claim 2 is characterized in that: The first conveyor belt (7) is provided with a station to be inspected and a station for loading a qualified gearbox; the second conveyor belt (21) is provided with a station for loading a failed gearbox; the station to be inspected, the station for loading a qualified gearbox, the station for loading a failed gearbox and the soundproof box (2) are all located within the working radius of the automatic picking module (6).

4. The noise and vibration automatic detection system for the gearbox of the horizontal seat drive of the automobile according to claim 2 is characterized in that: The automatic detection system also includes a clamping workbench (8), and an automatic picking module (6) is installed on the top surface of the clamping workbench (8); the automatic picking module (6) adopts a six-servo mechanical arm, the head end of the six-servo mechanical arm is fixedly connected to the clamping workbench (8), and the tail end is fixedly connected to the box cover (5) and the clamp (24), and the six-servo mechanical arm is electrically connected to the control module.

5. The noise and vibration automatic detection system for the gearbox of the horizontal seat drive of the automobile according to claim 4 is characterized in that: The six-servo mechanical arm comprises a large arm (22), a small arm (23) and six servos (3), each of which is electrically connected to a control module and controlled by the control module, and the six servos (3) are respectively a first servo (17), a second servo (15), a third servo (16), a fourth servo (18), a fifth servo (19) and a sixth servo (20); the first servo (17) is installed on a clamping workbench (8), the rotating end of the first servo (17) is transmission-connected with the head end of the large arm (22), and drives the large arm (22) to rotate in all directions; the second servo (15), the third servo (16), the fourth servo (18), the fifth servo (19) and the sixth servo (20) are respectively installed on a clamping workbench (8), the rotating end of the first servo (17) is transmission-connected with the head end of the large arm (22), and drives the large arm (22) to rotate in all directions; the second servo (15), the third servo (16) and the fourth servo (18) are respectively installed on a clamping workbench (8), the rotating end of the first servo (17) is transmission-connected with the head end of the large arm (22), and drives the large arm (22) to rotate in all directions; the second servo (15), the third servo (16) and the fourth servo (18) are respectively installed on a clamping workbench (8), and ... first servo (17) is (16) are respectively connected to the two ends of the horizontal rotating shaft arranged at the end of the upper arm (22), and drive the upper arm (22) to rotate around the horizontal rotating shaft; the upper arm (22) and the lower arm (23) are connected end to end through a horizontal connecting shaft, and the fourth steering gear (18) is connected to the horizontal connecting shaft and drives the lower arm (23) to rotate around the horizontal connecting shaft; the fifth steering gear (19) is connected to the end of the lower arm (23) and the end of the clamp (24) and controls the pitch clamping angle of the clamp (24); the sixth steering gear (20) is connected to the clamp (24) and controls the opening and closing of the clamp (24).

6. The noise and vibration automatic detection system for the gearbox of the horizontal seat drive of the automobile according to claim 4 is characterized in that: The first conveyor belt (7) and the second conveyor belt (21) are arranged in parallel, the inspection workbench (9) and the clamping workbench (8) are arranged at intervals and are both fixedly installed on the ground between the first conveyor belt (7) and the second conveyor belt (21), the clamping workbench (8) is located at the rear side of the inspection workbench (9) in the conveying direction of the first conveyor belt (7), and the qualified gear box loading station is located downstream of the station to be inspected.

7. The noise and vibration automatic detection system for the gearbox of the horizontal seat drive of the automobile according to claim 2 is characterized in that: The transmission shaft (12) is a special flexible shaft for a horizontal seat driver of an automobile. The end of the transmission shaft (12) away from the driving motor (1) is connected to the gear box through a worm jack inserted into the gear box.

8. A method for automatically detecting noise and vibration of a gearbox of a horizontal seat drive of an automobile using the automatic noise and vibration detection system as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: S1) conveying the horizontal seat drive gear box (14) of the automobile to be inspected from the head end of the first conveyor belt (7) to the station to be inspected; S2) using a machine vision camera to collect a real-time image of the vehicle horizontal seat drive gearbox (14) to be inspected on the first conveyor belt (7), and judging whether the vehicle horizontal seat drive gearbox (14) to be inspected has been conveyed to the inspection station based on the real-time image, and obtaining a real-time positioning result; S3) after detecting that the horizontal seat drive gearbox (14) of the automobile to be tested is transferred to the station to be tested, the control module is used to control the fixture (24) to clamp the horizontal seat drive gearbox (14) of the automobile to be tested, and the automatic picking module (6) is controlled to align the box cover (5) with the opening of the soundproof box (2), and then the worm screw socket of the horizontal seat drive gearbox (14) of the automobile to be tested is sleeved on the outside of the transmission shaft (12), and the box cover (5) is embedded in the opening of the soundproof box (2), so that the detection gearbox is moved from the station to be tested to the inside of the soundproof box (2); S4) using a control module to control a drive motor (1) to drive a gearbox (14) of a horizontal seat driver of the vehicle to be tested to run at a preset test speed and a preset test time, driving the test gearbox to run, using a microphone (11) and an acceleration sensor (25) to respectively collect noise signals and vibration acceleration signals during the operation of the gearbox (14) of the horizontal seat driver of the vehicle to be tested, and using a data processing module to detect the noise and vibration of the gearbox (14) of the horizontal seat driver of the vehicle to be tested according to the received noise signals and vibration acceleration signals, and determining whether the gearbox (14) of the horizontal seat driver of the vehicle to be tested is qualified; S5) using the control module to control the automatic picking module (6) according to the detection result to transfer the qualified gear box from the soundproof box (2) to the qualified gear box loading station on the first conveyor belt (7), and the first conveyor belt (7) conveys the qualified gear box to the next process, or transfers the unqualified gear box from the soundproof box (2) to the unqualified gear box loading station on the second conveyor belt (21) for rework; S6) Repeat steps S2 to S5 until the operation is completed.

9. The method for automatically detecting noise and vibration of a gearbox for a horizontal seat drive of an automobile according to claim 8, characterized in that: In the step S4), the detection process is specifically as follows: using an infinite impulse response filter to filter the received signal, extracting features from the filtered signal, combining the features extracted from the same filtered signal into a corresponding feature vector, and inputting the feature vectors corresponding to all filtered signals into a pre-trained classification model to obtain a detection result; the feature vector is mainly composed of time domain features, frequency domain features and time-frequency features.

10. The noise and vibration automatic detection method for a gearbox of a horizontal seat drive of an automobile according to claim 8, characterized in that: The drive motor (1) is in communication connection with a control module, and the control module controls the rotation speed of the drive motor (1) in the following manner: The control module controls the driving motor (1) to rotate at a speed of 10 r / min so as to match the shaft hole of the transmission shaft (12) with the gear box (14) of the horizontal seat driver of the vehicle to be tested; The control module controls the drive motor to rotate at a preset detection speed of 3000r / min for a preset detection time.

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