Automobile electric tail door hall signal fault detection and processing method and device and medium

Abstract

This invention discloses a method, device, and medium for detecting and processing Hall signal faults in an electric tailgate, relating to the field of electric tailgate technology. The method includes the following steps: upon receiving a tailgate control command, periodic Hall signals from the respective motors of both tailgate support rods are collected; it is determined whether the Hall signal has a valid edge trigger, and when no valid edge trigger is found on either side, a fault count is performed on the corresponding side's Hall signal; when the fault count on either side's Hall signal exceeds a preset threshold, a secondary confirmation of the fault on the corresponding side's Hall signal is performed based on the drive current of the motors on both sides; when either side's Hall signal is faulty, the speed and position information of the faulty side's support rod are calculated based on the normal Hall signal on the other side, and corresponding extension and retraction control is performed; when both sides' Hall signals are faulty, the tailgate operation is stopped. This invention combines fault counting and secondary detection of drive current to ensure real-time fault detection and avoid single-shot misjudgments.

Description

Technical Field

[0001] This invention relates to the field of electric tailgate technology, and more specifically to a method for detecting and handling Hall signal faults in automotive electric tailgates. Background Technology

[0002] Power tailgate systems are widely used in modern automobiles, providing convenient tailgate opening and closing functionality. Hall effect sensors, as a crucial component, determine the tailgate's position and status by detecting changes in the magnetic field. Hall effect sensors operate based on the Hall effect. When a current flows through a semiconductor material (Hall element) and that material is placed in a magnetic field, a voltage difference is generated perpendicular to both the current and the magnetic field; this is called the Hall voltage. Hall effect sensors utilize this principle to detect changes in the magnetic field. In power tailgate systems, the Hall effect sensor senses the movement of the rotating shaft within the strut motor as it approaches the sensor during rotation, determining the distance and speed of the strut, thereby detecting the tailgate's open / closed state.

[0003] However, Hall effect signals can be erroneous due to incorrect wiring installation or open / short circuits caused by wear and tear in the vehicle. This can lead to the control unit receiving incorrect Hall effect signals, preventing the controller from correctly acquiring the speed and position information of the corresponding electric struts. For example, if the left and right struts cannot move synchronously, it may result in the inability to successfully complete the basic function of opening and closing the tailgate, or even damage to the tailgate's mechanical structure. Therefore, it is crucial to perform fault detection on the Hall effect signals of the strut motors and develop corresponding troubleshooting methods. Summary of the Invention

[0004] To prevent further damage caused by Hall signal failure, this invention proposes a method for detecting and handling Hall signal failures in automotive electric tailgates, including the following steps:

[0005] S1: After receiving the tailgate control command, collect the periodic Hall signals of the tailgate's two-side strut motors respectively;

[0006] S2: Determine whether there is a valid edge trigger for the Hall signal, and perform a fault count for the corresponding Hall signal when there is no valid edge trigger for the Hall signal on any side;

[0007] S3: When the fault count of the Hall signal on any side is greater than the preset threshold, the fault of the Hall signal on the corresponding side is confirmed again based on the drive current of the dual-side strut motor.

[0008] S4: When the Hall signal on either side fails, the speed and position information of the strut on the failed side are calculated based on the normal Hall signal on the other side, and the corresponding telescopic control is performed. When both Hall signals on both sides fail, the tailgate operation is stopped.

[0009] Furthermore, in step S2, the criterion for determining effective edge triggering is the generation of a square wave signal.

[0010] Furthermore, in step S2, the absence of a valid edge triggering of the Hall signal on any side includes three scenarios: the absence of a valid edge triggering of the Hall signal on the first side strut motor, the absence of a valid edge triggering of the Hall signal on the second side strut motor, and the absence of a valid edge triggering of the Hall signals on both sides strut motors.

[0011] Furthermore, when the Hall signals of the dual-side strut motors have no effective edge triggering and the level of the input signals of the dual-side Hall sensors is the same at the same time, fault counting of the dual-side Hall signals is performed.

[0012] Furthermore, in step S3,

[0013] When the fault count of any single-sided Hall signal is greater than the preset threshold, if the absolute value of the difference in drive current between the two-sided strut motors is lower than the preset current difference, it is determined that the single-sided strut motor has a Hall signal fault.

[0014] When the fault count of the Hall signals on both sides is greater than the preset threshold, if the drive current of both strut motors is less than the first preset current, it is determined that there is a Hall signal short circuit fault in the strut motors on both sides; if the drive current of the first strut motor and / or the second strut motor is greater than or equal to the first preset current, it is determined that there is a motor jamming fault in the corresponding strut motor.

[0015] Furthermore, the drive current of the dual-strut motors is filtered before the difference is calculated.

[0016] Furthermore, the types of Hall signal faults include incorrect wiring harness installation, open circuit faults caused by wiring harness wear, and power supply short circuits or short circuits to ground.

[0017] The present invention also includes a computer-readable storage medium having a computer program stored thereon, characterized in that, when the program is executed by a processor, it implements the steps of the method for detecting and processing Hall signal faults in an electric tailgate of an automobile.

[0018] It also includes a data processing device, comprising:

[0019] A memory on which computer programs are stored;

[0020] A processor is used to execute a computer program in the memory to implement the steps of the method for detecting and processing Hall signal faults in an electric tailgate of a car.

[0021] Compared with the prior art, the present invention has at least the following beneficial effects:

[0022] (1) The method, device and medium for detecting and processing Hall signal faults of electric tailgate of automobile described in this invention, by periodically detecting Hall signal, combined with fault counting and secondary detection of drive current, avoids the possibility of single misjudgment on the basis of ensuring the real-time nature of fault detection.

[0023] (2) By calculating the difference between the two drive currents, Hall signal faults and motor jamming faults can be distinguished, thus improving the accuracy of fault diagnosis.

[0024] (3) When one Hall signal fails, another Hall signal can be used as the basis for adjustment through fault-tolerant control to continue to control the opening and closing of the tailgate, thus ensuring the basic functions of the system. Attached Figure Description

[0025] Figure 1 This is a step diagram of a method for detecting and handling Hall signal faults in an electric tailgate of a car. Detailed Implementation

[0026] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0027] This invention aims to solve the aforementioned problems in the prior art, providing a method for quickly and accurately identifying Hall signal faults in electric tailgate control systems, and a method for processing Hall signal faults. Based on this, by comprehensively considering both drive current and Hall sensor signal factors, this invention can more accurately identify and eliminate true Hall signal faults related to motor stall, such as... Figure 1 As shown, a method for detecting and handling Hall signal faults in automotive electric tailgates is proposed, including the following steps:

[0028] S1: After receiving the tailgate control command, collect the periodic Hall signals of the tailgate's two-side strut motors respectively;

[0029] S2: Determine whether there is a valid edge trigger for the Hall signal, and perform a fault count for the corresponding Hall signal when there is no valid edge trigger for the Hall signal on any side;

[0030] S3: When the fault count of the Hall signal on any side is greater than the preset threshold, the fault of the Hall signal on the corresponding side is confirmed again based on the drive current of the dual-side strut motor.

[0031] S4: When the Hall signal on either side fails, the speed and position information of the strut on the failed side are calculated based on the normal Hall signal on the other side, and the corresponding telescopic control is performed. When both Hall signals on both sides fail, the tailgate operation is stopped.

[0032] As can be seen, this invention achieves Hall signal fault diagnosis based on Hall signal anomaly monitoring and corresponding discrimination. Specifically, when the electric tailgate receives the control command to open / close, the tailgate performs the opening / closing action under the drive of the strut motor. During this process, the Hall sensor calculates the rotational speed by sensing the number of square wave signals generated by the S and N poles of the Hall sensing magnetic ring fitted on the drive shaft of the strut motor. This is because, under normal operating conditions, when the motor rotates once, the S and N poles of the sensing magnetic ring fitted on the rotating shaft of the strut motor will approach the Hall sensor once each. During this process, the Hall sensor will generate a sinusoidal signal based on the distance of the magnetic poles, and then, after shaping, generate a one-cycle digital square wave signal.

[0033] When the Hall sensor malfunctions, the square wave signal will inevitably fail to be generated correctly. Therefore, we determine the fault by periodically checking whether the Hall signals of the first and second side strut motors have valid edge triggering.

[0034] If the first Hall signal has no valid edge trigger, the first fault counter is incremented by a first preset value. If the second Hall signal has no valid edge trigger, the second fault counter is incremented by a second preset value. If neither the first nor the second Hall signal has a valid edge trigger, and the input signal levels of both Hall sensors are at the same level, the third fault counter is incremented by a third preset value. Here, we use counting to avoid misjudgment of faults caused by a single Hall signal loss. Only when the continuous count reaches a certain number, that is, when the strut motor has not generated a valid edge trigger for a relatively long period of time, can we initially determine that there is a possibility of a fault risk in the Hall signal.

[0035] To further ensure the accuracy of fault diagnosis, since the disappearance of magnetic field cutting when a Hall sensor malfunctions inevitably leads to a synchronous change in the strut motor drive current, we calculate the difference between the first-side strut motor drive current and the second-side strut motor drive current (after filtering) when the first preset value reaches a preset threshold. If the current difference is within a preset current difference value, we determine that the first-side strut motor has a Hall signal fault. Similarly, when the second preset value reaches a preset threshold, we calculate the difference between the second-side strut motor drive current and the first-side strut motor drive current (after filtering). If the current difference is within a preset current difference value, we determine that the second-side strut motor has a Hall signal fault. The Hall signal protection referred to here includes faults caused by incorrect wiring harness installation, open circuit faults due to wiring harness wear, short circuits to the power supply, or short circuits to ground.

[0036] When the fault count of the Hall signals on both sides, i.e., the third preset value, is greater than the preset threshold, if the drive current of both support rod motors is less than the first preset current, it is determined that there is a Hall signal short-circuit fault in both support rod motors; if the drive current of the first support rod motor and / or the second support rod motor is greater than or equal to the first preset current, it is determined that the corresponding support rod motor has a motor jamming fault. It should be noted that the preset threshold can be set specifically according to the system characteristics.

[0037] After determining a fault in the Hall signal within the strut motor based on Hall signal analysis, to prevent tailgate opening / closing malfunction or even mechanical damage caused by Hall signal failure, this invention utilizes the synchronous movement function of the dual strut system for the electric tailgate. This means the first and second strut motors move at similar speeds and positions, with minimal difference in drive current. When a Hall signal failure is detected in one of the electric struts, data from the Hall sensor of the normal strut motor on the other side is used as a reference to calculate the speed and position information of the faulty motor. This calculated speed and position information is then used as the result of the faulty Hall sensor's calculation to control the extension / retraction speed of the faulty strut motor. Of course, if both the first and second Hall signals are abnormal, whether due to a Hall signal fault or motor jamming, tailgate movement must be stopped immediately to ensure the tailgate's mechanical structure is not damaged.

[0038] The present invention also includes a computer-readable storage medium having a computer program stored thereon, characterized in that, when the program is executed by a processor, it implements the steps of the method for detecting and processing Hall signal faults in an electric tailgate of an automobile.

[0039] It also includes a data processing device, comprising:

[0040] A memory on which computer programs are stored;

[0041] A processor is used to execute a computer program in the memory to implement the steps of the method for detecting and processing Hall signal faults in an electric tailgate of a car.

[0042] In summary, the method, device, and medium for detecting and processing Hall signal faults in an electric tailgate of an automobile described in this invention, by periodically detecting Hall signals and combining fault counting and secondary detection of drive current, ensures real-time fault detection while avoiding the possibility of single-time misjudgment.

[0043] By calculating the difference between the two drive currents, Hall signal faults and motor jamming faults can be distinguished, improving the accuracy of fault diagnosis. When one Hall signal fails, fault-tolerant control allows the other Hall signal to be used as the adjustment basis to continue controlling the opening and closing of the tailgate, ensuring the basic functions of the system.

[0044] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0045] Furthermore, in this invention, descriptions involving terms such as "first," "second," and "a" are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0046] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0047] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

Claims

1. A method for detecting and processing Hall signal faults in an electric tailgate of an automobile, characterized in that, Including the following steps: S1: After receiving the tailgate control command, collect the periodic Hall signals of the tailgate's two-side strut motors respectively; S2: Determine whether there is a valid edge trigger for the Hall signal, and perform a fault count for the corresponding Hall signal when there is no valid edge trigger for the Hall signal on any side; In step S2, the absence of a valid edge triggering of the Hall signal on any side includes three scenarios: the absence of a valid edge triggering of the Hall signal on the first side strut motor, the absence of a valid edge triggering of the Hall signal on the second side strut motor, and the absence of a valid edge triggering of the Hall signal on both sides strut motors. S3: When the fault count of the Hall signal on any side is greater than the preset threshold, the fault of the Hall signal on the corresponding side is confirmed again based on the drive current of the dual-side strut motor. In step S3 When the fault count of any single-sided Hall signal is greater than the preset threshold, if the absolute value of the difference in drive current between the two-sided strut motors is lower than the preset current difference, it is determined that the single-sided strut motor has a Hall signal fault. When the fault count of the Hall signals on both sides is greater than the preset threshold, if the drive current of the two strut motors is less than the first preset current, it is determined that there is a Hall signal short circuit fault in the two strut motors. If the drive current of the first-side strut motor and / or the second-side strut motor is greater than or equal to the first preset current, it is determined that the corresponding strut motor has a motor jamming fault. S4: When the Hall signal on either side fails, the speed and position information of the strut on the failed side are calculated based on the normal Hall signal on the other side, and the corresponding telescopic control is performed. When both Hall signals on both sides fail, the tailgate operation is stopped.

2. The method for detecting and processing Hall signal faults in an electric tailgate of an automobile as described in claim 1, characterized in that, In step S2, the criterion for determining effective edge triggering is the generation of a square wave signal.

3. The method for detecting and processing Hall signal faults in an electric tailgate of an automobile as described in claim 1, characterized in that, When the Hall signal of the dual-side strut motor has no effective edge trigger and the level of the input signal of the dual-side Hall sensor is the same, the fault count of the dual-side Hall signal is performed.

4. The method for detecting and processing Hall signal faults in an electric tailgate of an automobile as described in claim 1, characterized in that, The drive current of the dual-strut motor is filtered before the difference is calculated.

5. The method for detecting and processing Hall signal faults in an electric tailgate of an automobile as described in claim 1, characterized in that, The types of Hall signal faults include incorrect wiring harness installation, open circuit faults caused by wiring harness wear, and power supply short circuits or short circuits to ground.

6. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the program implements the steps of the detection and processing method according to any one of claims 1 to 5.

7. A data processing apparatus, characterized in that, include: A memory on which computer programs are stored; A processor for executing a computer program in the memory to implement the steps of the detection and processing method according to any one of claims 1 to 5.

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