A Fault Diagnosis Method and System for Door Lock Acquisition Chips Applicable to the Whole Vehicle Level

Abstract

The present invention relates to the technical field of vehicle door lock control, and particularly relates to a method and system for diagnosing faults of a door lock acquisition chip applicable to the vehicle level. When the vehicle is in the locked state or the unlocked state, the present invention judges the faults of the door lock acquisition chip through different judgment methods, makes a reset request for it, and forces the chip to be initialized to achieve normal unlocking and locking; if the initialization fails, it forces unlocking to prevent vehicle self-locking; the present invention effectively avoids in advance the problem of vehicle self-locking caused by chip faults and ensures the life safety of users.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle door lock control, and particularly relates to a method and system for diagnosing faults of a door lock acquisition chip applicable to the vehicle level. Background Art

[0002] At present, the situation that the vehicle is self-locked and cannot be opened often occurs in the market. The reasons include faults in the mechanical structure of the door lock, signal reception failure caused by the controller crashing, software control logic loopholes, chip faults or unstable performance. Among them, the faults of the controller acquisition chip are not easy to be identified in advance at the vehicle level, and the vehicle diagnostic instrument cannot directly judge.

[0003] The existing methods for diagnosing faults of door lock chips usually conduct specific fault identification and control at the vehicle door lock device level, and can only be processed after the door lock device has failed. It is impossible to identify and process the faults of the door lock chip in advance at the vehicle level, and it is difficult to avoid the problem of vehicle mislocking in advance. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: aiming at the deficiencies of the prior art, to provide a method and system for diagnosing faults of a door lock acquisition chip applicable to the vehicle level, which can identify and process the faults of the door lock acquisition chip in advance at the vehicle level, effectively avoid the problem of vehicle self-locking caused by chip faults, and ensure the safety of users' lives.

[0005] To solve the above technical problem, the technical solution adopted by the present invention is:

[0006] A method for diagnosing faults of a door lock acquisition chip applicable to the vehicle level, which real-time monitors the vehicle state, door state signal and door lock state signal, and executes the following steps:

[0007] S1, identify the vehicle state. If the vehicle state is in the locked state, execute step S2; if the vehicle state is in the unlocked state, execute step S5;

[0008] S2, compare the door state signal and the door lock state signal. If the signal values of the door state signal and the door lock state signal are the same, it is determined that the door lock has no fault. If the signal values of the door state signal and the door lock state signal are different, and the inconsistent time t1 > T2, it is determined that the door lock acquisition chip may have a fault, and execute step S3;

[0009] S3, send a reset request for the door lock acquisition chip, and compare the door state signal and the door lock state signal again. If the signal values of the door state signal and the door lock state signal are the same, it is determined that the reset is successful. If the signal values of the door state signal and the door lock state signal are different, continue to send the reset request and record the number of resets;

[0010] S4. If the number of reset times > n, it is confirmed that the door lock acquisition chip has failed, and a door lock acquisition chip failure signal is sent. And a forced unlocking command is executed after the vehicle key issues an unlocking instruction. Otherwise, it is confirmed that the door lock acquisition chip is fault-free.

[0011] S5. After the vehicle key issues a locking instruction, detect the duration t2 of the continuous sending of the locking control signal.

[0012] S6. If t2 > T1 and the vehicle speed < 5 km / h at this time, it is determined that the door lock switch has a sticking failure, and a door lock switch sticking failure signal is sent. At the same time, a forced unlocking command is executed. Otherwise, it is determined that the door lock switch is fault-free.

[0013] Among them, the vehicle state is identified through the vehicle central control system, and the vehicle state specifically includes a locked state and an unlocked state.

[0014] Further, the door state signal and the door lock state signal are collected by the door lock acquisition chip, and the door lock acquisition chip is electrically connected to the vehicle central control system through chip pins; the door state specifically includes a door open state and a door closed state, and the door lock state specifically includes a door lock open state and a door lock closed state.

[0015] Further, both the door lock acquisition chip failure signal and the door lock switch sticking failure signal are sent to the vehicle central control system for processing.

[0016] Further, the locking control signal is continuously sent after the door module receives the locking instruction issued by the vehicle key, and stops sending after the door lock state changes to the closed state.

[0017] Further, the forced unlocking command is specifically implemented through a hard wire connection between the door module and the door lock mechanism.

[0018] Based on the same inventive concept, the present invention also provides a door lock acquisition chip fault diagnosis system for implementing the above-mentioned diagnosis method, mainly including:

[0019] A vehicle key for issuing vehicle unlocking and locking instructions;

[0020] A door module for forwarding the vehicle unlocking and locking instructions to the vehicle central control system and driving the door lock mechanism to perform corresponding actions according to the control instructions issued by the vehicle central control system;

[0021] A door lock mechanism for performing door unlocking and locking actions;

[0022] A door lock acquisition chip for collecting door state signals (door open / closed) and door lock state signals (door lock open / closed);

[0023] The vehicle central control system is used to identify the vehicle status (unlock / lock status) and read the information of the door module and the door lock acquisition chip for calculation and judgment, so as to execute the diagnostic method described above.

[0024] The present invention has the following main advantages compared with the prior art:

[0025] 1. The present invention provides a fault diagnosis method for the door lock acquisition chip. By comparing and judging the information of the door module and the door lock acquisition chip through the vehicle central control system, the fault of the door lock acquisition chip can be identified and processed in advance at the vehicle level, thereby effectively avoiding the vehicle self-locking problem caused by chip failure and ensuring the user's life safety;

[0026] 2. The fault diagnosis method provided by the present invention can accurately distinguish the faults of the door lock acquisition chip and the door lock actuator by analyzing the door state signal, the door lock state signal and the door lock control signal, and execute the reset of the door lock acquisition chip and the forced unlocking of the door lock mechanism to ensure the normal opening of the door;

[0027] 3. After identifying the faults of the door lock acquisition chip and the door lock switch, the present invention can timely send corresponding fault signals to the vehicle central control system, and send corresponding control commands according to the vehicle key instruction and the vehicle speed signal, which can avoid vehicle mislocking while ensuring vehicle safety and effectively guarantee the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a flowchart of the fault diagnosis method for the door lock acquisition chip in an embodiment of the present invention;

[0029] Figure 2 is a schematic diagram of the fault diagnosis system for the door lock acquisition chip in an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0030] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0031] It should be noted that according to the needs of implementation, the various steps / components described in this application can be split into more steps / components, or two or more steps / components or partial operations of steps / components can be combined into new steps / components to achieve the purpose of the present invention.

[0032] Embodiment 1. A method for diagnosing faults of a door lock acquisition chip applicable to the vehicle level provided in this embodiment. When the vehicle is in the locked state or the unlocked state, different judgment methods are used to judge the faults of the door lock acquisition chip, and a reset request is sent to it to force the chip to be initialized to achieve normal locking and unlocking; if the initialization fails, forced unlocking is performed to prevent vehicle self-locking.

[0033] In this embodiment, for the situation where the vehicle cannot be unlocked due to the fault of the door lock acquisition chip, the following diagnostic method is adopted for control:

[0034] 1. When the vehicle is in the locked state, the door state signal 1 corresponding to the pins of the door lock acquisition chip and the door lock state signal 2 are read through the vehicle central control system:

[0035] (1) If the signal values sent by the door state signal 1 and the door lock state signal 2 are consistent (both the door state and the door lock state are in the closed state), the door module of the vehicle controls the door lock mechanism to respond according to the key or other locking and unlocking requests;

[0036] (2) If the signal values sent by the door state signal 1 and the door lock state signal 2 are inconsistent, time detection is performed. If the time t1 when the two signals are inconsistent > T2 (the preset door lock fault judgment time), it is determined that the door lock acquisition chip may be faulty, a chip reset request is sent, and the reset times are recorded;

[0037] The door state signal and the door lock state signal are compared again. If they are consistent, it is determined that the reset is successful and the door lock acquisition chip is not faulty; if the two signals still remain inconsistent, the chip is reset again, and the reset times are recorded.

[0038] If the number of resets > n (the preset reset times threshold), it is confirmed that the chip is faulty, and a door lock acquisition chip fault signal is sent to the vehicle central control system. After receiving the unlocking instruction sent by the key, a forced unlocking command is executed to ensure that the door can be normally unlocked after receiving the key unlocking instruction, effectively preventing the vehicle from being accidentally locked.

[0039] 2. When the vehicle is in the unlocked state, after triggering the locking instruction, the locking control signal 3 sent by the door module and the door lock state signal 2 collected by the door lock acquisition chip are read through the vehicle central control system:

[0040] (1) After the locking instruction is triggered, the door module continuously sends out the locking control signal 3 until the door lock state becomes the closed state, and detects the continuous sending time t2 of the locking control signal 3. If t2 > T1 (the preset threshold of the continuous duration of the control signal) and the vehicle speed < 5 km / h at this time, it is considered that the vehicle is in the idle state, the chip acquisition signal is confirmed to be abnormal, and a door lock switch adhesion failure signal is sent to the vehicle central control system, and at the same time, a forced unlocking command is executed to prevent the vehicle from self-locking and causing the door to be unable to open.

[0041] Embodiment 2. A method for diagnosing faults of a door lock acquisition chip applicable to the vehicle level provided in this embodiment is as Figure 1 shown, and the specific steps are as follows:

[0042] S1. Identify the vehicle state. If the vehicle state is in the locked state, execute step S2; if the vehicle state is in the unlocked state, execute step S5.

[0043] S2. Compare the door state signal and the door lock state signal. If the signal values of the door state signal and the door lock state signal are the same, it is determined that the door lock has no fault. If the signal values of the door state signal and the door lock state signal are different, and the different time t1 > T2, it is determined that the door lock acquisition chip may have a fault, and execute step S3.

[0044] S3. Send a reset request for the door lock acquisition chip, and compare the door state signal and the door lock state signal again. If the signal values of the door state signal and the door lock state signal are the same, it is determined that the reset is successful. If the signal values of the door state signal and the door lock state signal are different, continue to send the reset request and record the number of resets.

[0045] S4. If the number of resets > n, confirm that the door lock acquisition chip has a fault, send a door lock acquisition chip fault signal, and execute a forced unlocking command after the vehicle key sends an unlocking instruction. Otherwise, confirm that the door lock acquisition chip has no fault.

[0046] S5. After the vehicle key sends a locking instruction, detect the continuous sending time t2 of the locking control signal.

[0047] S6. If t2 > T1 and the vehicle speed < 5 km / h at this time, it is determined that the door lock switch has an adhesion fault, send a door lock switch adhesion fault signal, and execute a forced unlocking command at the same time. Otherwise, it is determined that the door lock switch has no fault.

[0048] Among them, the vehicle state is identified through the vehicle central control system, and the vehicle state specifically includes the locked state and the unlocked state.

[0049] Further, the door state signal and the door lock state signal are collected by a door lock acquisition chip, and the door lock acquisition chip is electrically connected to the vehicle central control system through chip pins; the door state specifically includes the door open state and the door closed state, and the door lock state specifically includes the door lock open state and the door lock closed state.

[0050] Further, both the door lock acquisition chip failure signal and the door lock switch adhesion failure signal are sent to the vehicle central control system for processing.

[0051] Further, the locking control signal is continuously sent by the door module after receiving the locking instruction issued by the vehicle key, and stops being sent after the door lock state becomes the closed state.

[0052] Further, the forced unlocking command is specifically realized by hardwiring the door module and the door lock mechanism.

[0053] Embodiment 3, based on the same inventive concept, this embodiment also provides a door lock acquisition chip failure diagnosis system for implementing the diagnosis method as described above, as Figure 2 shown, mainly including:

[0054] A vehicle key for issuing vehicle unlocking and locking instructions;

[0055] A door module for forwarding the vehicle unlocking and locking instructions to the vehicle central control system and driving the door lock mechanism to perform corresponding actions according to the control instructions issued by the vehicle central control system;

[0056] A door lock mechanism for performing door unlocking and locking actions;

[0057] A door lock acquisition chip for collecting door state signals (door open / closed) and door lock state signals (door lock open / closed);

[0058] A vehicle central control system for identifying the vehicle state (unlocking / locking state) and reading the information of the door module and the door lock acquisition chip for calculation and judgment to execute the diagnosis method as described above.

[0059] Embodiment 4, based on the same inventive concept, this embodiment also provides a manual-automatic integrated vehicle, which is internally provided with the door lock acquisition chip failure diagnosis system as described above.

[0060] To sum up:

[0061] 1. The present invention provides a door lock acquisition chip failure diagnosis method. By comparing and judging the information of the door module and the door lock acquisition chip through the vehicle central control system, it can identify the failure of the door lock acquisition chip in advance at the vehicle level and process it, thereby effectively avoiding the vehicle self-locking problem caused by chip failure and ensuring the life safety of users;

[0062] 2. The fault diagnosis method provided by the present invention can accurately identify the faults of the door lock acquisition chip and the door lock actuator by analyzing the door state signal, the door lock state signal and the door lock control signal, and perform the reset of the door lock acquisition chip and the forced unlocking of the door lock mechanism to ensure the normal opening of the door.

[0063] 3. After identifying the faults of the door lock acquisition chip and the door lock actuator, the present invention can timely send the corresponding fault signals to the vehicle central control system, and send the corresponding control instructions according to the vehicle key command and the vehicle speed signal, which can avoid the vehicle from being accidentally locked while ensuring the safety of the vehicle, and effectively guarantee the user experience.

[0064] It is easy for those skilled in the art to understand that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for diagnosing faults of a door lock acquisition chip applicable to the vehicle level, characterized in that: It monitors the vehicle state, door state signal and door lock state signal in real time, and executes corresponding diagnostic strategies; The diagnostic strategies include: When the vehicle state is in the locked state, if the signal values of the door state signal and the door lock state signal are inconsistent, and the inconsistent time t1 > the preset door lock fault judgment time T2, it is determined that the door lock acquisition chip may have a fault. At the same time, a chip reset request is sent and the reset times are recorded. If the reset times > the preset reset times threshold n, it is confirmed that the door lock acquisition chip has a fault, and a forced unlocking command is executed after the vehicle key issues an unlocking instruction; When the vehicle state is in the unlocked state and the vehicle key issues a locking instruction, if the duration t2 of the locking control signal sent by the door module > the preset control signal duration threshold T1, and the vehicle speed < 5 km / h at this time, it is determined that the door lock switch has a sticking fault, and a forced unlocking command is executed at the same time.

2. The method for diagnosing the failure of a door lock acquisition chip applicable to the vehicle level according to claim 1, characterized in that, It includes the following steps: Identify the vehicle state. If the vehicle state is in the locked state, execute the vehicle locked state diagnostic control. If the vehicle state is in the unlocked state, execute the vehicle unlocked state diagnostic control; The vehicle locked state diagnostic control is specifically as follows: compare the door state signal and the door lock state signal. If the signal values of the door state signal and the door lock state signal are consistent, it is determined that the door lock has no fault; if the signal values of the door state signal and the door lock state signal are inconsistent, and the inconsistent time t1 > T2, it is determined that the door lock acquisition chip may have a fault, and the door lock acquisition chip fault diagnosis is executed; The door lock acquisition chip fault diagnosis is specifically as follows: send a door lock acquisition chip reset request, and compare the door state signal and the door lock state signal again. If the signal values of the door state signal and the door lock state signal are consistent, it is determined that the reset is successful. If the signal values of the door state signal and the door lock state signal are inconsistent, continue to send the reset request and record the reset times. When the reset times > n, it is confirmed that the door lock acquisition chip has a fault, and a door lock acquisition chip fault signal is sent, and a forced unlocking command is executed after the vehicle key issues an unlocking instruction, otherwise it is confirmed that the door lock acquisition chip has no fault; The vehicle unlocked state diagnostic control is specifically as follows: after the vehicle key issues a locking instruction, detect the continuously sent time t2 of the locking control signal. When t2 > T1 and the vehicle speed < 5 km / h at this time, it is determined that the door lock switch has a sticking fault, and a door lock switch sticking fault signal is sent, and a forced unlocking command is executed at the same time, otherwise it is determined that the door lock switch has no fault.

3. The method for diagnosing faults of a door lock acquisition chip applicable to the vehicle level according to claim 2, wherein The vehicle state is identified through the vehicle central control system, and the vehicle state specifically includes a locked state and an unlocked state.

4. A method for diagnosing faults of a door lock acquisition chip applicable to the vehicle level according to claim 2, characterized in that, The door state signal and the door lock state signal are collected through a door lock acquisition chip, and the door lock acquisition chip is electrically connected to the vehicle central control system through chip pins; the door state specifically includes a door open state and a door closed state, and the door lock state specifically includes a door lock open state and a door lock closed state.

5. The method for diagnosing a failure of a door lock acquisition chip applicable to the vehicle level according to claim 2, wherein Both the door lock acquisition chip fault signal and the door lock switch sticking fault signal are sent to the vehicle central control system for processing.

6. The method for diagnosing the failure of a door lock acquisition chip applicable to the vehicle level according to claim 2, characterized in that, The locking control signal is continuously emitted by the door module after receiving the locking instruction sent by the vehicle key, and stops being emitted after the door lock state changes to the closed state.

7. A method for diagnosing faults of a door lock acquisition chip applicable to the vehicle level according to claim 2, characterized in that, The forced unlocking command is specifically implemented through the hard wiring between the door module and the door lock mechanism.

8. A door lock acquisition chip fault diagnosis system for implementing the diagnosis method described in any one of claims 1 to 7, characterized in that, It includes: A vehicle key for sending vehicle unlocking and locking instructions; A door module for forwarding the vehicle unlocking and locking instructions to the vehicle central control system and driving the door lock mechanism to perform corresponding actions according to the control instructions sent by the vehicle central control system; A door lock mechanism for performing door unlocking and locking actions; A door lock acquisition chip for acquiring door state signals and door lock state signals; A vehicle central control system for identifying the vehicle state and reading the information of the door module and the door lock acquisition chip for calculation and judgment to execute the diagnostic method according to any one of claims 1 to 7.

9. A non-transitory readable storage medium, on which a program is stored, characterized in that, When the program is executed by the door lock acquisition chip fault diagnosis system, it implements the diagnostic method according to any one of claims 1 to 7.

10. A manual-automatic integrated vehicle, characterized in that: It includes the door lock acquisition chip fault diagnosis system according to claim 8.

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