Automobile seat electric slide rail tester and test method

Abstract

The invention relates to the technical field of industrial machinery detection, in particular to an automobile seat electric sliding rail tester and a testing method.The automobile seat electric sliding rail tester comprises a workbench, a control system and an intelligent detection system, the workbench comprises a sliding rail testing tool and a vibration measuring device, and the sliding rail testing tool comprises a sliding rail bearing device, a walking motor module and a simulation load; the slide rail bearing device bears and fixes a slide rail to be detected, the displacement motor module drives the slide rail to be detected to move, the simulation load simulates the resistance of an automobile seat to the slide rail, and the vibration measurement device obtains vibration detection data in the moving process of the slide rail to be detected; the control system controls the displacement direction, speed and displacement amount of the to-be-tested slide rail and the simulation load. And the intelligent detection system outputs a detection result of the to-be-detected slide rail. The on-line abnormal sound quality inspection of the electric slide rail of the automobile seat can be realized, the defects of high misjudgment rate, low efficiency and the like of manual abnormal sound auscultation are overcome, the manpower waste is greatly reduced, and the quality inspection reliability is improved.

Description

Technical Field

[0001] The invention relates to the technical field of industrial machinery detection, in particular to a vehicle seat electric slide rail tester and a test method. Background Art

[0002] As the living standards of Chinese residents improve, more and more vehicles are equipped with seats with electric control devices, and the quality of these seats directly affects the user's evaluation of the vehicle. As one of the core components of electric adjustable seats, the electric slide rails of car seats need to meet the two requirements of convenience and comfort of adjustment. If large vibrations or various abnormal noises are generated during the adjustment of the slide rails, it will directly affect the comfort of the driver and passengers, and may even distract the driver's attention, thus affecting the safety of driving.

[0003] In the prior art, electric slide rails are usually tested by manually opening and closing the electric slide rails, or by manually holding a motor to drive the slide rails to move. This method has a slow detection speed and poor accuracy. Manual opening and closing of the slide rails is prone to uneven force, which may cause damage to the electric slide rails. The detection of the movement of the slide rails driven by a handheld motor cannot accurately ensure that the slide rails are perpendicular, and may produce abnormal noises due to manual operation errors. It cannot truly reflect the processing quality of the slide rails to be tested, and the detection results are unstable and inaccurate.

[0004] Another type of detection method uses a professional silent room with a background noise below 30dB to detect seat noise, and uses manual auscultation to determine the noise level of the seat slide rails. The disadvantages of this method are that the silent room is expensive to build and the quality inspection efficiency is low. It is also heavily dependent on the skill level of the slide rail inspectors, and the test accuracy is unstable, which may cause quality risks. Summary of the invention

[0005] The present invention provides a car seat electric slide rail tester and a test method, which solves the drawbacks of high misjudgment rate and low efficiency of manual auscultation of abnormal noise through automation and AI intelligent technology; through the accumulation and iteration of database models, the car seat electric slide rail can realize online abnormal noise quality inspection, which greatly reduces manpower waste and improves quality inspection reliability.

[0006] This application provides the following technical solutions:

[0007] An electric slide rail tester for a car seat comprises a workbench, a control system and an intelligent detection system, wherein the workbench comprises a slide rail test fixture and a vibration measuring device, wherein the slide rail test fixture comprises a slide rail bearing device, a moving motor module and a simulated load, wherein the slide rail bearing device is used to bear and fix the lower rail of the slide rail to be tested, the moving motor module is used to drive the motor of the slide rail to be tested to achieve the displacement of the upper rail of the slide rail, the simulated load is used to simulate a car seat, and the vibration measuring device is used to obtain vibration detection data during the moving process of the slide rail to be tested;

[0008] The control system is used to control the displacement direction, displacement speed and displacement amount of the upper rail of the slide rail to be tested, the simulated load and the vibration measuring device;

[0009] The intelligent detection system is used to output the detection result of the slide rail to be tested.

[0010] Furthermore, the slide rail test jig includes a left slide rail test jig and a right slide rail test jig that are relatively arranged, which are respectively used to test the left slide rail and the right slide rail of the electric seat. The left slide rail test jig includes a left slide rail bearing device, a left movement motor module, and a left simulated load. The right slide rail test jig includes a right slide rail bearing device, a right movement motor module, and a right simulated load.

[0011] Furthermore, the left movement motor module and the right movement motor module include a slide, a driving flexible shaft, a voltage sensor and a current sensor. The slide is connected to the workbench through a guide rail and a drag chain. A grating scale is provided under the slide, and a reading head of the grating scale is provided on the bottom surface of the slide. The driving flexible shaft, the voltage sensor and the current sensor are fixedly installed on the top surface of the slide. The driving flexible shaft can be electrically connected to the driving motor of the slide to be tested. The voltage sensor is used to detect the voltage signal of the driving motor of the slide to be tested, and the current sensor is used to detect the current signal of the driving motor of the slide to be tested.

[0012] Further, a first vibration measuring device is provided on the right side of the left slide rail bearing device, and the first vibration measuring device includes a first vibration sensor with a magnetic base, a first sensor platform and a first mechanical arm; a second vibration measuring device is provided on the left side of the right slide rail bearing device, and the second vibration measuring device includes a second vibration sensor with a magnetic base, a second sensor platform and a second mechanical arm; the first vibration sensor collects three-dimensional vibration data of the left slide rail to be tested, and the second vibration sensor collects three-dimensional vibration data of the right slide rail to be tested;

[0013] The left simulated load includes a left slide rail forward load and a left slide rail reverse load. The left slide rail forward load is arranged axially in front of the left slide rail bearing device and is driven by the left forward cylinder. The left slide rail reverse load is arranged axially behind the left slide rail bearing device and is driven by the left reverse cylinder. The right simulated load includes a right slide rail forward load and a right slide rail reverse load. The right slide rail forward load is arranged axially in front of the right slide rail bearing device and is driven by the right forward cylinder. The right slide rail reverse load is arranged axially behind the right slide rail bearing device and is driven by the right reverse cylinder.

[0014] Furthermore, the workbench includes a top plate, a left side plate, a right side plate and a rear side plate, wherein the left side plate and the right side plate are respectively provided with a double-opening inspection door, and the top plate is provided with a pickup for recording abnormal sound data during the movement process of the slide rail to be tested; the workbench is also provided with a safety light curtain, a control button and a slide rail handwheel, the safety light curtain monitors the operating area, the control button is used to start and stop intelligent detection, and the slide rail handwheel is used to manually adjust the displacement of the slide rail bearing device.

[0015] Furthermore, the intelligent detection system includes a signal preprocessing module, a feature extraction module and an intelligent analysis module, wherein the signal preprocessing module shapes and filters the collected vibration data signal, the feature extraction module extracts abnormal feature data from the filtered vibration data signal, and the intelligent analysis module uses a trained intelligent abnormal analysis model to analyze the abnormal feature data and output the detection results.

[0016] Furthermore, the intelligent analysis module inputs the three-way vibration data of the forward segment and the reverse segment into the loudness model respectively, performs noise reduction and filtering processing, and extracts the kurtosis index, loudness effective value, narrow-band loudness envelope and narrow-band time domain envelope of the vibration signal as abnormal feature data; the slide rail abnormal fault types are divided according to the abnormal feature data, and when the loudness characteristic value of the reverse vibration signal is greater than the first loudness threshold or the loudness characteristic value of the forward vibration signal is greater than the second loudness threshold, it is determined to be a rustling sound abnormality; when equally spaced periodic fluctuations appear in the narrow-band time domain envelope of the vibration signal, it is determined to be a jitter abnormality; when the sum of the kurtosis index after frame division in the X-direction and Z-direction vibration signals is greater than the first kurtosis threshold, it is determined to be a scratch abnormality; when the time domain envelope spectrum characteristic value of the vibration signal within the filter frequency band exceeds the threshold, it is determined to be an axle swing abnormality.

[0017] Furthermore, the intelligent detection system also includes an analog input module, an AD conversion module, an input device and a display device. The analog input module is electrically connected to the first vibration sensor, the second vibration sensor, the voltage sensor, the current sensor, the grating scale reading head and the AD conversion module. The AD conversion module converts the analog signal quantity obtained by the analog input module into a digital signal and sends it to the signal preprocessing module. The input device includes a barcode scanner and a keyboard, and the display device is a display screen with a touch function.

[0018] The principles and advantages of the present invention are:

[0019] The upper rail is driven by a travel motor, and the lower rail is fixed with the slide rail bearing fixture, which can accurately control the speed and displacement of the electric slide rail opening and closing, avoiding damage to the electric slide rail caused by uneven force when opening and closing the slide rail manually, improving production efficiency and saving production costs;

[0020] Use vibration data to establish abnormal characteristic data of the slide rail, and associate the abnormal vibration characteristic data with the abnormal noise type of the slide rail. There is no need to build a high-cost silent room, and the detection process will not be affected by environmental noise.

[0021] Compared with the existing detection methods, the present invention establishes an intelligent analysis model based on industrial big data, realizes automatic identification and classification of the fault types of the slide rail, has high detection accuracy, and eliminates the disadvantage of poor stability caused by manual auscultation;

[0022] The vibration, voltage, current, abnormal sound and other test data during the test are automatically collected and saved, which can realize the automation and intelligence of the entire test process, and at the same time has a complete data tracking function;

[0023] Based on the abnormal data samples accumulated in the production process, the judgment rules of the intelligent analysis model can be trained, verified, and parameters adjusted and optimized through signal preprocessing, feature extraction, and machine learning algorithms, thereby further improving the test accuracy of the intelligent analysis model.

[0024] On the other hand, the present invention also provides a method for testing an electric slide rail of a vehicle seat, comprising the following steps:

[0025] S1. The operator enters the user name and password to log in to the electric slide test system;

[0026] S2. Set the signal and test conditions of the slide rail to be tested in the test software interface;

[0027] S3, scan the barcode of the slide rail to be tested, align the mounting hole of the lower rail of the slide rail with the protrusion of the slide rail bearing fixture, fix the slide rail to be tested, and connect the driving flexible shaft of the travel motor module with the slide rail motor;

[0028] S4. Check the slide rail displacement data and confirm that the slide rail displacement is zero;

[0029] S5, start the test button, the mechanical arm clamps the vibration sensor from the sensor platform and places it in the middle of the upper rail surface of the slide rail to be tested, and the vibration sensor is magnetically connected to the upper rail of the slide rail to be tested;

[0030] The forward electric cylinder of the slide rail drives the forward load of the slide rail to contact the front end of the upper rail of the slide rail to be tested, and the travel motor module drives the slide rail motor to drive the upper rail of the slide rail to be tested and the forward load of the slide rail to move forward to the preset maximum forward displacement;

[0031] The forward electric cylinder of the slide rail drives the forward load of the slide rail to disengage from the front end of the upper rail of the slide rail to be tested, the reverse electric cylinder drives the reverse load of the slide rail to contact with the rear end of the upper rail of the slide rail to be tested, and the travel motor module drives the slide rail motor to drive the upper rail of the slide rail to be tested and the reverse load of the slide rail to move backward to the preset reverse maximum displacement;

[0032] The reverse electric cylinder of the slide rail drives the reverse load of the slide rail to disengage the rear end of the upper rail of the slide rail to be tested, and the travel motor module drives the slide rail motor to reset the upper rail to the zero displacement position. The robotic arm clamps the vibration sensor and places it on the sensor platform;

[0033] S6, the electric slide rail intelligent detection system analyzes the detection data of the slide rail to be tested and outputs the detection result;

[0034] S7. Record the faulty product data according to the output results of the intelligent detection system, and mark the faulty product test data as abnormal.

[0035] Further, the specific steps of S6 are as follows:

[0036] S61, reading voltage detection data;

[0037] S62, voltage signal shaping;

[0038] S63, analyzing the voltage signal to complete the time period positioning, and intercepting the vibration data of the forward section and the reverse section of the slide rail;

[0039] S64. Extract abnormal signal features based on vibration data, compare them with the AI ​​intelligent model, and the AI ​​intelligent model outputs the detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a side view of the electric slide rail tester for automobile seats;

[0041] Figure 2 This is a schematic diagram of the structure of the right slide rail test fixture. DETAILED DESCRIPTION

[0042] The following is further described in detail through specific implementation methods:

[0043] The marks in the drawings of the specification include: bottom plate 1, top plate 2, left side plate 3, right side plate 4, rear side plate 5, keyboard 6, barcode scanner 7, display screen 8, equipment cabinet 9, slide rail handwheel 10, left slide rail test fixture 11, right slide rail test fixture 12, control button box 13, pickup 14, load guide rail 15, slide rail bearing guide rail 16, slide table guide rail 17, load slide bar 18, right slide rail forward load 19, right slide rail reverse load 20, robotic arm 21, slide rail bearing device 22, slide table 23, and drive flexible shaft 24.

[0044] Embodiment 1

[0045] This embodiment provides a vehicle seat electric slide rail tester, the structure of which is as follows: Figure 1 As shown, it includes a workbench, a control system, an intelligent detection system, an input device and a display device.

[0046] like Figure 1As shown, the workbench includes a bottom plate 1, a top plate 2, a left side plate 3, a right side plate 4 and a rear side plate 5, which enclose a test operation space with an opening at the front. The left side plate 3 and the right side plate 4 are respectively provided with glass doors that open to facilitate the operator to observe whether the actions of the various components of the tester comply with the preset program. The top plate 2 is provided with a pickup 14, which is used to record the abnormal sound data of the movement process of the slide rail to be tested. A safety light curtain is provided at the opening of the test operation space, and the safety light curtain monitors the opening area of ​​the test operation space. When the safety light curtain is blocked, it means that the operator's action of loading and unloading the slide rail to be tested has not been completed, and the test program will not be started, ensuring the personal safety of the operator. A control button box 13 and a slide rail handwheel 10 are provided at the front of the tester. The control button box 13 is provided with buttons for starting and stopping intelligent detection, and the slide rail handwheel 10 is used to manually adjust the displacement of the slide rail bearing device 22.

[0047] A left rail test fixture 11 and a right rail test fixture 12 are arranged opposite to each other on the bottom plate 1, and are used to test the left rail and the right rail of the electric seat respectively, wherein the left rail test fixture 11 includes a left rail bearing device, a left travel motor module, and a left simulated load, and the right rail test fixture 12 includes a right rail bearing device, a right travel motor module, and a right simulated load. The structures of the left rail test fixture 11 and the right rail test fixture 12 are similar, and for simplicity of description, the right rail test fixture 12 is taken as an example for detailed description.

[0048] like Figure 2 As shown, three parallel linear guide rails are installed on the bottom plate 1 area corresponding to the right slide rail test fixture 12, which are the load guide rail 15, the slide rail bearing guide rail 16 and the slide table guide rail 17 from left to right. Limit devices are provided at both ends of the three guide rails.

[0049] Among them, a load slide bar 18 in the same direction as the guide rail is provided on the upper part of the load guide rail 15, and a right slide rail positive load 19 and a right slide rail reverse load 20 are respectively installed at both ends of the load guide rail 15. The lower parts of the right slide rail positive load 19 and the right slide rail reverse load 20 are both slider structures and are slidably connected to the load guide rail 15, and the middle part is provided with an opening for the load slide bar 18 to pass through, and the upper part is provided with a horizontal extension part perpendicular to the axial direction of the load guide rail 15, and the length of the horizontal extension part is greater than the distance between the load guide rail 15 and the slide rail bearing guide rail 16. The right slide rail positive load 19 is driven by the right positive cylinder and can move smoothly along the axial direction of the load guide rail 15 and the load slide bar 18; the right slide rail reverse load 20 is driven by the right reverse cylinder and can move smoothly along the axial direction of the load guide rail 15 and the load slide bar 18. The slide rail positive load and the slide rail reverse load apply resistance when the slide rail to be tested moves, and the applied resistance is the same as the actual displacement resistance generated after the seat is installed on the slide rail.

[0050] A sensor platform, a vibration sensor and a mechanical arm 21 are provided in the middle of the load rail 15. The vibration sensor is electrically connected to the analog input module of the intelligent detection system, and has a magnetic base, which can be adsorbed on the upper surface of the slide rail to measure three-dimensional vibration data. Before the test, the vibration sensor is placed on the sensor platform. After the test is started, the mechanical arm 21 clamps the vibration sensor and places it on the upper rail surface of the slide rail to be tested. The vibration sensor is connected to the slide rail to be tested through the magnetic base; after the test is completed, the mechanical arm 21 clamps the vibration sensor and places it back on the sensor platform.

[0051] The slide rail bearing device 22 is installed on the slide rail bearing guide rail 16. The slide rail bearing device 22 is composed of a plurality of I-shaped cross-section bearing platforms, the lower part of which is clamped to the slide rail bearing guide rail 16, and both ends have vertical side planes. A plurality of bosses are provided on the top horizontal surface of the slide rail bearing device 22, and the positions of the bosses match the mounting holes of the slide rail lower rail. The mounting holes of the slide rail lower rail to be tested are clamped into the bosses to complete the quick fixation.

[0052] A slide 23 is installed on the right slide rail 17, a grating ruler is provided on the bottom plate 1 below the slide 23, and a reading head of the grating ruler is provided at the bottom of the slide 23. A moving motor module is installed on the top surface of the slide 23, including a driving flexible shaft 24, a voltage sensor and a current sensor. The driving flexible shaft is connected to the control system, and can be pushed in or out in a direction perpendicular to the slide rail 17, connected to the slide motor to be tested and powered to the motor. By controlling the voltage polarity and current size of the motor power supply, the displacement direction and displacement speed of the upper rail of the slide rail can be controlled. When the upper rail of the slide rail produces a forward displacement, the right forward cylinder drives the right slide rail forward load 19 to contact the upper rail of the slide rail, and applies a reverse resistance to the upper rail of the slide rail, simulating the process of adjusting the car seat forward; when the upper rail of the slide rail produces a reverse displacement, the right reverse cylinder drives the right slide rail reverse load 20 to contact the upper rail of the slide rail, and applies a forward resistance to the upper rail of the slide rail, simulating the process of adjusting the car seat backward. The voltage sensor of the travel motor module is used to detect the driving voltage of the slide motor, and the current sensor is used to detect whether the working current of the slide motor exceeds the stall current. The power supply line and signal line of the travel motor module are connected to the control system and analog input module respectively after being arranged by the drag chain.

[0053] An equipment cabinet 9 is provided below the bottom plate 1 for installing a control system and an intelligent detection system. The equipment cabinet 9 is provided with a side door for easy maintenance. A universal wheel with a locking mechanism is provided at the bottom of the equipment cabinet 9.

[0054] The control system includes a slide rail displacement detection module, a slide rail drive module, a load drive module and a mechanical arm drive module. The slide rail displacement detection module obtains the reading of the grating ruler and determines the movement direction and displacement of the upper rail of the slide rail; the slide rail drive module adjusts the supply voltage, voltage polarity and supply current of the slide rail motor according to the setting of the test program; the load drive module drives the forward cylinder and the reverse cylinder to adjust the position of the forward load and the reverse load according to the displacement of the slide rail and the setting of the test program; the mechanical arm drive module drives the mechanical arm 21 to pick up and place the vibration sensor when the slide rail to be tested is in the zero displacement position. Among them, when the start button is pressed and the initial displacement of the slide rail is zero, the control system controls the mechanical arm 21 in sequence to clamp the vibration sensor and place the vibration sensor on the upper rail surface of the slide rail to be tested, and controls the forward cylinder to drive the forward load to contact the upper rail of the slide rail, and then controls the driving soft shaft to power the slide rail motor, so that the slide rail motor pulls open in the forward direction and pushes the forward load; when the displacement detection module determines that the forward displacement of the upper rail of the slide rail reaches the preset value through the grating ruler reading, the control system controls the forward cylinder to drive the forward load to disengage from the upper rail of the slide rail, controls the reverse cylinder to drive the reverse load to contact the upper rail of the slide rail, and changes the voltage polarity of the slide rail motor at the same time, and the upper rail of the slide rail will be pulled open in the reverse direction and push the reverse load; when the displacement detection module determines that the reverse displacement of the upper rail of the slide rail reaches the preset value through the grating ruler reading, the control system controls the reverse cylinder to drive the reverse load to disengage from the upper rail of the slide rail, and changes the voltage polarity of the slide rail motor to reset the upper rail of the slide rail to zero displacement, and finally controls the mechanical arm 21 to clamp the vibration sensor and place it on the sensor platform.

[0055] The intelligent detection system includes an analog input module, an AD conversion module and an intelligent analysis module. The analog input module obtains the analog signals collected by the vibration sensor, the voltage sensor and the current sensor respectively and sends them to the AD conversion module; the AD conversion module converts the analog signals into digital signals and sends them to the intelligent analysis module. A trained intelligent analysis model for slide rail abnormality is provided in the intelligent analysis module, which includes a signal preprocessing unit, a feature extraction unit and an analysis output unit. The signal preprocessing unit extracts the data of the corresponding period from the zero displacement to the positive maximum displacement of the slide rail as the positive segment according to the displacement detection result, and extracts the data of the corresponding period from the positive maximum displacement to the reverse maximum displacement of the slide rail as the reverse segment, shapes and filters the vibration signals of the forward segment and the reverse segment, and the feature extraction unit extracts the abnormal feature data from the filtered vibration signal. The analysis output unit uses the trained intelligent analysis model for slide rail abnormality to analyze the abnormal feature data, classifies the abnormal slide rail according to the analysis result and outputs the classification result.

[0056] In the slide rail abnormality intelligent analysis model, the three-way vibration data of the forward and reverse segments are respectively input into the ISO-532-1 loudness model for noise reduction and filtering, and the kurtosis index, loudness effective value, narrow-band loudness envelope and narrow-band time domain envelope of the vibration signal are extracted as abnormal feature data. According to the abnormal feature data, the slide rail abnormality is divided into multiple fault types, including jitter, shaft swing, rustling sound and scratching. Among them, jitter is defined as the imbalance or improper installation of the components; shaft swing is defined as the axial swing of the guide rail during operation, which is usually manifested as the axial displacement, tilt or rotation of the guide rail slider; rustling sound is defined as continuous low-frequency abnormal sound, which may be caused by the lack of sufficient lubricating oil on the slide rail surface or the insufficient smoothness of the slide rail surface, resulting in direct contact and friction between metal parts; scratching is defined as high-frequency sharp abnormal sound, which may be caused by the improper alignment or fixation of the slide rail during installation, or the scratches and depressions on the slide rail surface, resulting in the scratching sound of the slider when passing through these areas.

[0057] When the loudness characteristic value of the reverse vibration signal is greater than the first loudness threshold or the loudness characteristic value of the forward vibration signal is greater than the second loudness threshold, it is determined to be a rustling sound abnormality. In this embodiment, the first loudness threshold is determined to be 82sone and the second loudness threshold is determined to be 78sone; when equally spaced periodic fluctuations appear in the narrow-band time domain envelope of the vibration signal, it is determined to be a jitter abnormality; when the sum of the kurtosis index after frame division in the X-direction and Z-direction vibration signals is greater than the first kurtosis threshold, it is determined to be a scratch abnormality. In this embodiment, the first kurtosis threshold is determined to be 249; when the time domain envelope spectrum characteristic value of the vibration signal within the filter frequency band exceeds the threshold, it is determined to be a shaft swing abnormality. In this embodiment, the filter frequency band is defined as 2-10Hz.

[0058] The control system and the intelligent detection system can be implemented using a PLC or an industrial computer. In this embodiment, an industrial computer is used for implementation, wherein the analog input module and the AD conversion module are arranged in the chassis of the industrial computer, and the intelligent analysis module is arranged in the control software of the industrial computer.

[0059] The input device of the tester includes a barcode scanner 7 and a keyboard 6, which complete the barcode entry of the slide rail to be tested and the parameter setting of the tester. The display device is a display screen 8 with a touch function, and the display content includes the parameter setting interface of the tester and the test data and analysis results of the slide rail to be tested. Among them, the parameter setting of the tester includes the test slide rail model, maximum displacement of the slide rail, stall current, sampling channel, sampling time, sampling frequency, and sampling sensitivity; the test data of the slide rail to be tested includes the time curve of the loudness effective value, the loudness envelope and spectrum envelope of the vibration signal, and the 1 / 3 octave analysis results.

[0060] During actual use, after the operator scans the rail barcode and installs the rail to be tested, confirms that the displacement is zero, and then starts the test program. After the safety light curtain detects that the operating space meets the safety requirements, the test program is started to detect the rail to be tested. The control system controls the robot arm 21 to place the vibration sensor, and controls the movement of the rail to be tested and the load. After completing the data acquisition of the forward and reverse segments, the control system resets the rail to be tested and controls the robot arm 21 to retrieve the vibration sensor. When the output result of the intelligent detection system is abnormal, the tester reminds the operator through sound and light signals, and a prompt window pops up on the display device. The operator can add an abnormal label to the test data of the rail. The test data of the rail will be added to the test database, and the test data with abnormal labels will also be added to the sample library of the rail abnormal intelligent analysis model for subsequent analysis.

[0061] Embodiment 2

[0062] This embodiment provides a method for testing an electric slide rail of a vehicle seat, comprising the following steps:

[0063] S1. The operator enters the user name and password to log in to the electric slide tester;

[0064] S2. Select the electric slide model to be tested in the test software interface and set the slide test conditions;

[0065] S3, scan the barcode of the slide rail to be tested, align the mounting hole of the lower rail of the slide rail with the convex column of the slide rail bearing fixture, fix the slide rail to be tested, and connect the driving flexible shaft of the travel motor module with the slide rail motor;

[0066] S4. Check the displacement data of the slide rail and confirm that the displacement of the slide rail is zero;

[0067] S5, start the test button, the mechanical arm clamps the vibration sensor from the sensor platform and places it in the middle of the upper rail surface of the slide rail to be tested, and the vibration sensor is magnetically connected to the upper rail of the slide rail to be tested;

[0068] The forward electric cylinder of the slide rail drives the forward load of the slide rail to contact the front end of the upper rail of the slide rail to be tested, and the travel motor module drives the slide rail motor to drive the upper rail of the slide rail to be tested and the forward load of the slide rail to move forward to the preset maximum forward displacement;

[0069] The forward electric cylinder of the slide rail drives the forward load of the slide rail to disengage from the front end of the upper rail of the slide rail to be tested, the reverse electric cylinder drives the reverse load of the slide rail to contact with the rear end of the upper rail of the slide rail to be tested, and the travel motor module drives the slide rail motor to drive the upper rail of the slide rail to be tested and the reverse load of the slide rail to move backward to the preset reverse maximum displacement;

[0070] The reverse electric cylinder of the slide rail drives the reverse load of the slide rail to disengage the rear end of the upper rail of the slide rail to be tested, and the travel motor module drives the slide rail motor to reset the upper rail to the initial position. The robotic arm clamps the vibration sensor and places it on the sensor platform.

[0071] S6. The electric slide rail intelligent detection system analyzes the detection data of the electric slide rail and outputs the detection results, including the following specific steps:

[0072] S61, reading voltage detection data;

[0073] S62, shaping the voltage signal;

[0074] S63, analyzing the voltage signal to complete the time period positioning, and intercepting the data of the forward and reverse segments of the slide rail movement;

[0075] According to the displacement of the slide rail and the polarity change of the voltage signal, the time point t1 when the slide rail reaches the maximum positive displacement and the time point t2 when the slide rail reaches the maximum reverse displacement can be determined. The time period from 0 to t1 is taken as the forward segment of the slide rail movement, and the time period from t1 to t2 is taken as the reverse segment of the slide rail movement.

[0076] S64. Extract abnormal signal features, compare them with the AI ​​intelligent model, and the AI ​​intelligent model outputs the detection results.

[0077] According to the time period determined by S63, the three-way vibration data of the forward segment and the reverse segment are respectively input into the ISO-532-1 loudness model for noise reduction and filtering, and the kurtosis index, loudness effective value, narrowband loudness envelope and narrowband time domain envelope of the vibration signal are extracted as abnormal feature data. According to the abnormal feature data, the slide rail abnormality is divided into multiple fault types, including jitter, shaft swing, rustling sound and scratching. When the loudness characteristic value of the reverse vibration signal is greater than the first loudness threshold or the loudness characteristic value of the forward vibration signal is greater than the second loudness threshold, it is determined to be a rustling sound abnormality; when equally spaced periodic fluctuations appear in the narrowband time domain envelope of the vibration signal, it is determined to be a jitter abnormality; when the sum of the kurtosis index after framing in the X-direction and Z-direction vibration signals is greater than the first kurtosis threshold, it is determined to be a scratching abnormality; when the time domain envelope spectrum characteristic value of the vibration signal within the filter frequency band exceeds the threshold, it is determined to be a shaft swing abnormality;

[0078] In this embodiment, the first loudness threshold is 82 sones, the second loudness threshold is 78 sones, the first kurtosis threshold is 249, and the filter frequency band is 2-10 Hz.

[0079] S7. Record the faulty product data according to the output results of the intelligent detection system, and mark the faulty product test data as abnormal.

[0080] The above are only embodiments of the present invention. The invention is not limited to the field involved in this implementation case. The common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. Car seat electric slide rail tester, characterized by: It includes a workbench, a control system and an intelligent detection system. The workbench includes a slide rail test fixture and a vibration measuring device. The slide rail test fixture includes a slide rail bearing device, a moving motor module and a simulated load. The slide rail bearing device is used to bear and fix the lower rail of the slide rail to be tested. The moving motor module is used to drive the motor of the slide rail to be tested to achieve the displacement of the upper rail of the slide rail. The simulated load is used to simulate a car seat. The vibration measuring device is used to obtain vibration detection data during the moving process of the slide rail to be tested. The control system is used to control the displacement direction, displacement speed and displacement amount of the upper rail of the slide rail to be tested, the simulated load and the vibration measuring device; The intelligent detection system is used to output the detection result of the slide rail to be tested.

2. The electric slide rail tester for automobile seat according to claim 1, characterized in that: The slide rail test jig includes a left slide rail test jig and a right slide rail test jig that are relatively arranged, and are respectively used to test the left slide rail and the right slide rail of the electric seat. The left slide rail test jig includes a left slide rail bearing device, a left movement motor module, and a left simulated load. The right slide rail test jig includes a right slide rail bearing device, a right movement motor module, and a right simulated load.

3. The electric slide rail tester for automobile seat according to claim 2, characterized in that: The left movement motor module and the right movement motor module include a slide, a driving flexible shaft, a voltage sensor and a current sensor. The slide is connected to the workbench through a guide rail and a drag chain. A grating scale is provided under the slide, and a reading head of the grating scale is provided on the bottom surface of the slide. The driving flexible shaft, the voltage sensor and the current sensor are fixedly installed on the top surface of the slide. The driving flexible shaft can be electrically connected to the driving motor of the slide to be tested. The voltage sensor is used to detect the voltage signal of the driving motor of the slide to be tested, and the current sensor is used to detect the current signal of the driving motor of the slide to be tested.

4. The electric slide rail tester for automobile seat according to claim 2, characterized in that: A first vibration measuring device is provided on the right side of the left slide rail bearing device, and the first vibration measuring device includes a first vibration sensor with a magnetic base, a first sensor platform and a first mechanical arm; a second vibration measuring device is provided on the left side of the right slide rail bearing device, and the second vibration measuring device includes a second vibration sensor with a magnetic base, a second sensor platform and a second mechanical arm; the first vibration sensor collects three-dimensional vibration data of the left slide rail to be measured, and the second vibration sensor collects three-dimensional vibration data of the right slide rail to be measured; The left simulated load includes a left slide rail forward load and a left slide rail reverse load. The left slide rail forward load is arranged axially in front of the left slide rail bearing device and is driven by the left forward cylinder. The left slide rail reverse load is arranged axially behind the left slide rail bearing device and is driven by the left reverse cylinder. The right simulated load includes a right slide rail forward load and a right slide rail reverse load. The right slide rail forward load is arranged axially in front of the right slide rail bearing device and is driven by the right forward cylinder. The right slide rail reverse load is arranged axially behind the right slide rail bearing device and is driven by the right reverse cylinder.

5. The electric slide rail tester for automobile seat according to claim 1, characterized in that: The workbench includes a top plate, a left side plate, a right side plate and a rear side plate, wherein the left side plate and the right side plate are respectively provided with a double-opening inspection door, and the top plate is provided with a pickup for recording abnormal sound data during the movement process of the slide rail to be tested; the workbench is also provided with a safety light curtain, a control button and a slide rail handwheel, the safety light curtain monitors the operating area, the control button is used to start and stop intelligent detection, and the slide rail handwheel is used to manually adjust the displacement of the slide rail bearing device.

6. The electric slide rail tester for automobile seat according to claim 1, characterized in that: The intelligent detection system includes a signal preprocessing module, a feature extraction module and an intelligent analysis module, wherein the signal preprocessing module shapes and filters the collected vibration data signal, the feature extraction module extracts abnormal feature data from the filtered vibration data signal, and the intelligent analysis module uses a trained intelligent abnormal analysis model to analyze the abnormal feature data and output the detection results.

7. The electric slide rail tester for automobile seat according to claim 6, characterized in that: The intelligent analysis module inputs the three-way vibration data of the forward segment and the reverse segment into the loudness model respectively, performs noise reduction and filtering processing, and extracts the kurtosis index, loudness effective value, narrow-band loudness envelope and narrow-band time domain envelope of the vibration signal as abnormal feature data; classifies the abnormal fault types of the slide rail according to the abnormal feature data, and determines that a rustling sound abnormality occurs when the loudness characteristic value of the reverse vibration signal is greater than a first loudness threshold or the loudness characteristic value of the forward vibration signal is greater than a second loudness threshold; determines that a jitter abnormality occurs when equally spaced periodic fluctuations appear in the narrow-band time domain envelope of the vibration signal; determines that a scratch abnormality occurs when the sum of the kurtosis indexes after frame division in the X-direction and Z-direction vibration signals is greater than the first kurtosis threshold, determines that a scratch abnormality occurs; and determines that a shaft swing abnormality occurs when the time domain envelope spectrum characteristic value of the vibration signal within the filter frequency band exceeds the threshold.

8. The electric slide rail tester for automobile seat according to claim 6, characterized in that: The intelligent detection system also includes an analog input module, an AD conversion module, an input device and a display device. The analog input module is electrically connected to the first vibration sensor, the second vibration sensor, the voltage sensor, the current sensor, the grating scale reading head and the AD conversion module. The AD conversion module converts the analog signal quantity obtained by the analog input module into a digital signal and sends it to the signal preprocessing module. The input device includes a barcode scanner and a keyboard, and the display device is a display screen with a touch function.

9. The test method of electric slide rail for automobile seat is characterized by: The following steps are involved: S1. The operator enters the user name and password to log in to the electric slide test system; S2. Set the signal and test conditions of the slide rail to be tested in the test software interface; S3, scan the barcode of the slide rail to be tested, align the mounting hole of the lower rail of the slide rail with the protrusion of the slide rail bearing fixture, fix the slide rail to be tested, and connect the driving flexible shaft of the travel motor module with the slide rail motor; S4. Check the slide rail displacement data and confirm that the slide rail displacement is zero; S5, start the test button, the mechanical arm clamps the vibration sensor from the sensor platform and places it in the middle of the upper rail surface of the slide rail to be tested, and the vibration sensor is magnetically connected to the upper rail of the slide rail to be tested; The forward electric cylinder of the slide rail drives the forward load of the slide rail to contact the front end of the upper rail of the slide rail to be tested, and the travel motor module drives the slide rail motor to drive the upper rail of the slide rail to be tested and the forward load of the slide rail to move forward to the preset maximum forward displacement; The forward electric cylinder of the slide rail drives the forward load of the slide rail to disengage from the front end of the upper rail of the slide rail to be tested, the reverse electric cylinder drives the reverse load of the slide rail to contact with the rear end of the upper rail of the slide rail to be tested, and the travel motor module drives the slide rail motor to drive the upper rail of the slide rail to be tested and the reverse load of the slide rail to move backward to the preset reverse maximum displacement; The reverse electric cylinder of the slide rail drives the reverse load of the slide rail to disengage the rear end of the upper rail of the slide rail to be tested, and the travel motor module drives the slide rail motor to reset the upper rail to the zero displacement position. The robotic arm clamps the vibration sensor and places it on the sensor platform. S6, the electric slide rail intelligent detection system analyzes the detection data of the slide rail to be tested and outputs the detection result; S7. Record the faulty product data according to the output results of the intelligent detection system, and mark the faulty product test data as abnormal.

10. The vehicle seat electric slide rail testing method according to claim 9, characterized in that: The specific steps of S6 are as follows: S61, reading voltage detection data; S62, voltage signal shaping; S63, analyzing the voltage signal to complete the time period positioning, and intercepting the vibration data of the forward section and the reverse section of the slide rail; S64. Extract abnormal signal features based on vibration data, compare them with the AI ​​intelligent model, and the AI ​​intelligent model outputs the detection results.

Images