Whole vehicle seat calibration test system and method

Abstract

The invention discloses a whole vehicle seat calibration test system and method. Comprising the following steps: when the operation of the motor in a certain direction reaches a first limit position, recording the current Hall number of the motor as a first Hall number; when the operation of the motor in the other direction reaches a second limit position, recording the current Hall number of the motor as a second Hall number; and obtaining the motor stroke of the motor according to the first Hall number and the second Hall number of the motor. Fault detection is carried out synchronously when the vehicle is off line, faults are prevented from flowing to the downstream, and the production period is effectively shortened; timeout judgment is adopted in the calibration process of seat self-learning, seat learning can be prevented from falling into an endless loop, and the calibration process is quitted in time.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile seat travel calibration, and in particular relates to a whole vehicle seat calibration test system and method. Background Art

[0002] With the development of automobile intelligence, people have higher and higher requirements for automobile riding comfort, intelligence, and multi-scenario applications. In order to meet customers' needs for comfort, intelligence, and multi-scenario applications, many automobile manufacturers have adopted integrated heating, ventilation, massage functions, and automatic adjustment seat control solutions with memory functions. Based on the position memory requirements of the seats, this also forces the entire vehicle to calibrate and learn the extreme positions of the seats when it rolls off the production line, so that the vehicle can have multi-scenario position memory functions when it reaches the user end. In addition, the number of seat functions has increased dramatically, and seat manufacturers with relatively weak quality control have relatively weak control over seat quality, making it difficult to ensure the pass rate and consistency of the seats;

[0003] In summary, the traditional manual operation of seat adjustment buttons is time-consuming, seriously affecting the efficiency of vehicle offline, and it is impossible to control the consistency of the seats online. Therefore, it is necessary to establish a complete seat calibration method and process, while meeting the automatic position calibration and quality inspection of the seats, in order to improve the production efficiency of the whole vehicle and ensure that qualified products are offline, and meet the needs of the after-sales market for simple operation learning after replacement.

[0004] The existing technology is usually one-way learning, that is, learning is performed through one-way blocking of the motor, which cannot ensure the consistency of seat travel. If an incorrect blocking occurs, the controller will not be able to perform functions normally. It is impossible to detect faults when the seat is off the line (during the off-line electrical inspection before the vehicle comes off the production line). There is no timeout judgment, and the seat learning will fall into an endless loop. It cannot meet the after-sales market's demand for one-click seat learning after replacement. Summary of the invention

[0005] In order to improve the efficiency of seat calibration and increase the qualified rate of products off the production line, the present invention proposes a whole vehicle seat calibration test system and method.

[0006] A vehicle seat calibration test system to achieve one of the purposes of the present invention comprises:

[0007] Motor parameter acquisition module: used to acquire the operating parameters of the seat motor; the acquisition method includes: when the motor reaches the first limit position in a certain direction, recording the current Hall number of the motor as the first Hall number; when the motor reaches the second limit position in another direction, recording the current Hall number of the motor as the second Hall number;

[0008] Motor stroke calculation module: used to obtain the motor stroke of the motor according to the first Hall number and the second Hall number of the motor.

[0009] In the above system, the start command of the seat motor can be issued by the vehicle diagnostic equipment or the central control system through a self-learning command; for example, when the vehicle is initialized and rolled off the line, the vehicle diagnostic equipment is used to issue a seat self-learning command to start the seat motor; when the vehicle is delivered to the end user, when the seat needs to be replaced, the end user can enter the seat self-learning interface through the central control system, and the central control system will issue a seat self-learning command to start the seat motor and enter the self-learning state. During the self-learning process, the motor stroke is obtained, and the seat calibration is completed according to the motor stroke.

[0010] The above system also includes an overtime operation judgment module, which is used to start a timer to record the unidirectional operation time of the motor when the motor is running; when the unidirectional operation time exceeds the set unidirectional operation maximum time t max When the motor stops running, the motor stroke acquisition of this motor fails.

[0011] The above system also includes a calibration result judgment module for judging whether the seat calibration is successful. The judgment method includes: comparing the motor stroke with the design stroke of the motor. When the motor stroke is within the set range of the design stroke of the motor, it is judged that the calibration of the motor is successful.

[0012] In the motor stroke calculation module, the method for calculating the motor stroke includes:

[0013] The difference between the second Hall number of the motor and the first Hall number is the motor stroke of the motor.

[0014] The above system also includes a motor drive circuit detection module: which is used to detect the state of the motor drive circuit after the seat motor is started.

[0015] Furthermore, in the motor drive circuit detection module, the state of the motor drive circuit is detected after the seat motor is started for a set time. The technical effect of this step is to avoid inaccurate current values ​​obtained when the motor is just started, thereby affecting the judgment of the state of the motor drive circuit.

[0016] Furthermore, the method for detecting the state of the motor drive circuit includes:

[0017] After the motor starts running for a set time, the current of the motor is obtained;

[0018] When the current is less than the first current value, it is determined that the motor circuit state is abnormal; at this time, the motor drive circuit is in an open circuit state;

[0019] When the current is greater than the second current value, it is determined that the motor circuit state is abnormal; at this time, the motor drive circuit is in a short-circuit state.

[0020] The first current value is a minimum current value set during normal operation, and the second current value is a maximum threshold value set during locked-rotor operation.

[0021] When the motor drive circuit is in an open or short circuit state, the motor stops running and feedback seat calibration fails.

[0022] The method for judging whether the motor reaches the first limit position or the second limit position when running in a certain direction includes:

[0023] The current reaches the stall threshold and the Hall signal is lost continuously for a set period of time.

[0024] A vehicle seat calibration test method for achieving the second object of the present invention comprises the following steps:

[0025] Obtain the operating parameters of the seat motor, including:

[0026] When the motor reaches a first limit position in a certain direction, the current Hall number of the motor is recorded as the first Hall number; when the motor reaches a second limit position in another direction, the current Hall number of the motor is recorded as the second Hall number; the first limit position may be a limit position blocking point in the certain direction; the second limit position may be a limit position blocking point in the other direction;

[0027] The motor stroke of the motor is obtained according to the first Hall number and the second Hall number of the motor.

[0028] Furthermore, the calculation method of the motor stroke includes: the difference between the second Hall number of the motor and the first Hall number of the motor is the motor stroke of the motor.

[0029] The seat motor includes multiple motors. During the calibration process of the vehicle seat, multiple motors are started simultaneously. The motors include the seat rail motor, the backrest motor, and the height motor. The technical effect of this step is to save the time of the stroke self-learning of each motor.

[0030] A non-transitory computer-readable storage medium is provided to achieve the third objective of the present invention, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the vehicle seat calibration test method are implemented.

[0031] The beneficial effects of the present invention include:

[0032] 1. The present invention realizes the automatic calibration and learning of the seat position of the whole vehicle off the assembly line, realizes the determination of the stall and stall point by sampling the motor drive current, determines the motor learning state in combination with the preset value of the motor Hall stroke, and effectively detects the short circuit and open circuit faults of the motor drive circuit in real time by combining the Hall signal cycle with the determination of the sampled running current; that is, the consistency of the seat stroke is ensured, and the controller can normally execute the functions related to the position memory after the false stall occurs;

[0033] 2. The seats are tested for faults when they are off the production line to prevent faults from spreading downstream, effectively shortening the production cycle;

[0034] 3. The timeout judgment is used in the calibration process of seat self-learning to avoid the seat learning falling into an endless loop and exit the calibration process in time;

[0035] 4. The vehicle computer settings can meet the after-sales market's need to learn the seats with one click after replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the process of the method of the present invention;

[0037] Figure 2 is a schematic diagram of the system of the present invention;

[0038] Figure 3 It is a flowchart of the open circuit / short circuit judgment of the motor circuit. DETAILED DESCRIPTION

[0039] The following specific implementations are used to explain the technical solutions of the claims of the present invention so that those skilled in the art can understand the claims. The protection scope of the present invention is not limited to the following specific implementation structures. The technical solutions of the claims of the present invention made by those skilled in the art but different from the following specific implementations are also within the protection scope of the present invention.

[0040] A vehicle seat calibration test method, such as Figure 1 As shown, the following steps are included:

[0041] 1. The vehicle diagnostic equipment or central control system sends a self-learning command. When the vehicle is initialized and offline, the vehicle diagnostic equipment sends a self-learning command. When the end user needs to change the seat, the central control system can enter the seat self-learning interface and send the self-learning command. The design end uses the central control system as a carrier to set a button to send the seat learning command. After the end user operates the corresponding learning button, the central control system sends the learning command to the seat controller. After the seat learning is completed, the learning result is fed back to the central control system.

[0042] The vehicle diagnostic device is a handheld device that supports issuing seat offline calibration instructions and has actual calibration test results; the central control system is a vehicle computer display interface;

[0043] 2. After receiving the self-learning start command, the data processing unit drives the motor to operate according to the set process. In order to save learning time, the seat motors in all directions move at the same time, including the seat slide motor, backrest motor, and height motor;

[0044] 3. After the motor output is turned on for t1, the motor drive circuit open / short circuit detection is started. t1 is the duration of the motor starting current. The t1 delay judgment time is set to avoid the motor starting moment. Generally, the motor starting current is 3 times the running current, and the duration is less than 500mS. The technical effect of this step is to detect faults caused by wiring harness assembly or unqualified parts, and avoid vehicle faults from flowing to the vehicle after it is offline.

[0045] The motor drive circuit open circuit / short circuit detection method in this step is as follows Figure 3 As shown, including:

[0046] When the seat motor is running, the controller detects the motor running current in real time;

[0047] When the motor running current I is less than the minimum threshold value I set during normal operation min , that is, I<I min When the controller thinks that the motor circuit is open, it stops the motor output and feedbacks the self-learning failure status;

[0048] When the motor running current I is greater than the maximum threshold value I set during stall operation max , that is, I>I max , the controller considers that the motor circuit is short-circuited, stops the motor output, and feeds back the self-learning failure status.

[0049] 4. When the motor is running, the internal timer of the processor is started at the same time. When the one-way running time exceeds the maximum one-way running time t max ; That is, t>t max When the seat hard stop point is determined to be abnormal, the motor movement is stopped, and the learning error information is reported; this step can effectively prevent the seat learning from falling into an endless loop, unable to exit the process in time, and feedback of the seat learning failure status.

[0050] 5. When the motor reaches the first limit position stall point in one-way operation, it is regarded as the first limit position stall point of the motor and the current Hall number a is recorded;

[0051] The method for determining that the motor reaches the first limit position stall point when running in one direction comprises:

[0052] The current reaches the stall threshold and the Hall signal is lost continuously for a set time; the stall current threshold is set by the current setting when the motor is stalled; the set time in this embodiment is 500ms, but is not limited thereto;

[0053] 6. After the motor reaches the first limit position stall point, it immediately runs in the reverse direction until it reaches the second limit position stall point and stops. At this time, the Hall number is recorded as b;

[0054] The method for determining that the motor reaches the second limit position stall point when running in one direction comprises:

[0055] The current reaches the stall threshold and the Hall signal is lost continuously for a set time; the stall current threshold is set by the current setting when the motor is stalled;

[0056] 7. The processor calculates that the motor stroke of the seat is c=ba;

[0057] 8. When designing the seat, the travel range d in each direction has been set according to the requirements. Due to the manufacturing and assembly errors in the actual process, the error is usually set to 10%; the processor compares the calculated motor travel c with the designed travel d±10%. When the calculated motor travel c is within the designed travel range, that is, d-10%≤c≤d+10%, it determines that the corresponding seat motor learning is effective; after obtaining the motor travel of each motor of the seat, the extreme position of the seat can be obtained, thereby completing the calibration of the seat, and then realizing the adaptive function of the seat, that is, when the vehicle recognizes the user's identity or account, the seat position can be automatically loaded;

[0058] 9. After all motors stop running, the seat learning results are fed back to the diagnostic equipment or vehicle system and fed back to the user through a visual interface. If the seat learning result is successful, the vehicle can be offline. If the seat learning result is a failure, the vehicle needs to be returned for repair.

[0059] It should be understood that the order of execution of the steps in the above embodiment does not necessarily mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present invention.

[0060] To implement the method of the present invention, the present invention also provides a vehicle seat calibration test device, such as Figure 2 As shown, it includes vehicle diagnostic equipment, data processing unit, motor current sampling unit, motor Hall sampling module, and central control system;

[0061] In some embodiments, the vehicle diagnostic device is a handheld device that supports issuing seat calibration instructions and has the function of realizing calibration test results;

[0062] In some embodiments, the central control system is a vehicle computer display interface;

[0063] In some embodiments, the motor current sampling unit is used to sample the motor drive current and also used to determine the running state of the motor;

[0064] In some embodiments, the motor Hall acquisition unit is used to obtain position information of the motor movement;

[0065] In some embodiments, the data processing unit is a vehicle seat controller, which is used to receive seat calibration commands issued by the vehicle diagnostic equipment, and is also used to receive the current value of the motor current acquisition unit and the Hall cycle and Hall count value of the motor Hall acquisition unit, and judge the state of the motor drive circuit based on the current value, and calculate the motor stroke of each motor based on the Hall number.

[0066] The embodiment of the present invention also includes a vehicle seat calibration test system, including:

[0067] Motor parameter acquisition module: used to acquire the operating parameters of the seat motor; the acquisition method includes: when the motor reaches the first limit position in a certain direction, recording the current Hall number of the motor as the first Hall number; when the motor reaches the second limit position in another direction, recording the current Hall number of the motor as the second Hall number;

[0068] Motor stroke calculation module: used to obtain the motor stroke of the motor according to the first Hall number and the second Hall number of the motor.

[0069] In certain embodiments, the command to start the seat motor may be issued by a self-learning command issued by the vehicle diagnostic equipment or the central control system; for example, when the vehicle is initialized and offline, the vehicle diagnostic equipment may issue a self-learning command, thereby turning on the motors of the seat; when the vehicle is delivered to the end user, in the event of a seat replacement, the end user may enter the seat self-learning interface through the central control system, and the central control system may issue a self-learning command, thereby starting the motors of the seat to enter a self-learning state, obtaining the stroke of each motor during the self-learning process, and completing seat calibration based on the stroke of each motor.

[0070] In some embodiments, an overtime operation judgment module is further included, which is used to start a timer to record the unidirectional operation time of the motor when the motor is running; when the unidirectional operation time exceeds the set unidirectional operation maximum time t max When the motor is stopped.

[0071] In some embodiments, a calibration result judgment module is also included to judge whether the seat calibration is successful. The judgment method includes: comparing the motor stroke with the design stroke of the motor. When the motor stroke is within the set range of the design stroke of the motor, it is determined that the calibration of the motor is successful.

[0072] In some embodiments, in the motor stroke calculation module, the method for calculating the motor stroke includes:

[0073] The difference between the second Hall number of the motor and the first Hall number is the motor stroke of the motor.

[0074] In some embodiments, a motor drive circuit detection module is further included: used to detect the state of the motor drive circuit after the seat motor is started.

[0075] In some embodiments, the motor drive circuit detection module detects the state of the motor drive circuit after the seat motor is started for a set period of time.

[0076] In some embodiments, a method for detecting a state of a motor drive circuit includes:

[0077] After the motor starts running for a set time, the current of the motor is obtained;

[0078] When the current is less than the first current value, it is determined that the motor circuit state is abnormal;

[0079] When the current is greater than the second current value, it is determined that the motor circuit state is abnormal.

[0080] In some embodiments, the first current value is a minimum current value set during normal operation, and the second current value is a maximum threshold value set during locked-rotor operation.

[0081] In some embodiments, a method for determining whether the motor reaches a first limit position or a second limit position when running in a certain direction includes:

[0082] The current reaches the stall threshold and the Hall signal is lost continuously for a set period of time.

[0083] The embodiment of the present invention also provides a vehicle seat calibration test method, comprising the following steps:

[0084] The operating parameters of the seat motor are obtained, wherein the operating parameters include the Hall number of the motor. The obtaining method includes:

[0085] When the motor reaches the first limit position in a certain direction, the current Hall number of the motor is recorded as the first Hall number; when the motor reaches the second limit position in the other direction, the current Hall number of the motor is recorded as the second Hall number;

[0086] The motor stroke of the motor is obtained according to the first Hall number and the second Hall number of the motor.

[0087] In some embodiments, after the seat motor is started, the motor start timer records the one-way running time; when the one-way running time exceeds the set one-way running maximum time t max The one-way mode means that the motor runs in one direction.

[0088] In some embodiments, it also includes determining whether the seat calibration is successful, and the determination method includes: comparing the motor stroke with the design stroke of the motor, and when the motor stroke is within the set range of the design stroke of the motor, it is determined that the calibration of the motor is successful.

[0089] In some embodiments, the method of calculating the motor stroke includes:

[0090] The difference between the second Hall number of the motor and the first Hall number is the motor stroke of the motor.

[0091] In some embodiments, after the seat motor starts for a set time, the state of the motor drive circuit is detected, such as starting the motor drive circuit open circuit / short circuit detection after the motor is turned on for a time t1. The time t1 is the duration of the motor starting current. The technical effect of setting the t1 delay judgment is to avoid taking the wrong current value. Generally, the current when the motor starts is 3 times the operating current, and the duration is usually less than 500mS; therefore, the state of the motor drive circuit is detected after the current stabilizes to avoid misjudgment. The purpose of detecting the motor drive circuit at the same time is to detect faults caused by wiring harness assembly or unqualified parts in advance to avoid vehicle faults flowing to the vehicle after it is offline.

[0092] In some embodiments, after the seat motor is started, the state of the motor drive circuit is detected.

[0093] In some embodiments, after the seat motor is started for a set time, the state of the motor drive circuit is detected.

[0094] In some embodiments, a method for detecting a state of a motor drive circuit includes:

[0095] After the motor starts running for a set time, the current of the motor is obtained;

[0096] When the current is less than the first current value, it is determined that the motor circuit state is abnormal;

[0097] When the current is greater than the second current value, it is determined that the motor circuit state is abnormal.

[0098] In some embodiments, the first current value is a minimum current value set during normal operation, and the second current value is a maximum threshold value set during locked-rotor operation.

[0099] In some embodiments, a method for determining whether the motor reaches a first limit position or a second limit position when running in a certain direction includes:

[0100] The current reaches the stall threshold and the Hall signal is lost continuously for a set period of time.

[0101] In some embodiments, the motors in all directions of the seat move simultaneously, and the motors include a seat slide motor, a backrest motor, and a height motor, so as to save the self-learning time of the motor stroke of each motor.

[0102] An embodiment of the present invention further provides a computer-readable storage medium, which stores a computer program. The computer program includes program instructions. When the program instructions are executed by a processor, the steps of the method described in the present invention are implemented, which will not be repeated here.

[0103] The computer-readable storage medium may be the data transmission device provided in any of the aforementioned embodiments or the internal storage unit of the computer device, such as the hard disk or memory of the computer device. The computer-readable storage medium may also be an external storage device of the computer device, such as a plug-in hard disk, a smart memory card (smartmedia card, SMC), a secure digital (secure digital, SD) card, a flash card (flash card), etc., provided on the computer device.

[0104] Furthermore, the computer-readable storage medium may include both an internal storage unit of the computer device and an external storage device. The computer-readable storage medium is used to store the computer program and other programs and data required by the computer device. The computer-readable storage medium may also be used to temporarily store data to be output or has been output.

[0105] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0106] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0107] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0108] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0109] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

Claims

1. A vehicle seat calibration test system, characterized in that: include: Motor parameter acquisition module: used to acquire the operating parameters of the seat motor; the acquisition method includes: when the motor reaches the first limit position in a certain direction, recording the current Hall number of the motor as the first Hall number; when the motor reaches the second limit position in another direction, recording the current Hall number of the motor as the second Hall number; Motor stroke calculation module: used to obtain the motor stroke of the motor according to the first Hall number and the second Hall number of the motor.

2. The vehicle seat calibration test system according to claim 1, characterized in that: The module also includes an overtime operation judgment module, which is used to start a timer to record the unidirectional operation time of the motor when the motor is running; when the unidirectional operation time exceeds the set unidirectional operation maximum time t max When the motor is stopped.

3. The vehicle seat calibration test system according to claim 1, characterized in that: It also includes a calibration result judgment module for judging whether the seat calibration is successful. The judgment method includes: comparing the motor stroke with the design stroke of the motor. When the motor stroke is within the set range of the design stroke of the motor, it is judged that the calibration of the motor is successful.

4. The vehicle seat calibration test system according to claim 1, characterized in that: It also includes a motor drive circuit detection module: used to detect the state of the motor drive circuit after the seat motor is started.

5. The vehicle seat calibration test system according to claim 4, characterized in that: In the motor drive circuit detection module, after the seat motor is started for a set time, the state of the motor drive circuit is detected.

6. The vehicle seat calibration test system according to claim 4 or 5, characterized in that: Methods for detecting the state of the motor drive circuit include: After the motor starts running for a set time, the current of the motor is obtained; When the current is less than the first current value, it is determined that the motor circuit state is abnormal; When the current is greater than the second current value, it is determined that the motor circuit state is abnormal.

7. The vehicle seat calibration test system according to claim 6, characterized in that: The first current value is a minimum current value set during normal operation, and the second current value is a maximum threshold value set during locked-rotor operation.

8. The vehicle seat calibration test system according to claim 1, characterized in that: The method for judging whether the motor reaches the first limit position or the second limit position when running in a certain direction includes: The current reaches the stall threshold and the Hall signal is lost continuously for a set period of time.

9. A vehicle seat calibration test method, characterized in that: The steps include: Obtain the operating parameters of the seat motor, including: When the motor reaches the first limit position in a certain direction, the current Hall number of the motor is recorded as the first Hall number; when the motor reaches the second limit position in the other direction, the current Hall number of the motor is recorded as the second Hall number; The motor stroke of the motor is obtained according to the first Hall number and the second Hall number of the motor.

10. The vehicle seat calibration test method according to claim 9, characterized in that: The seat motor includes a plurality of motors, and during the whole vehicle seat calibration process, the plurality of motors are started simultaneously.

11. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, any step of the vehicle seat calibration test method as described in claims 9 to 10 is implemented.

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