CN-122014070-A - Integrated control method and system for vehicle back door based on integrated execution mechanism

CN122014070ACN 122014070 ACN122014070 ACN 122014070ACN-122014070-A

Abstract

The invention provides a vehicle back door integrated control method and system based on an integrated execution mechanism, which belong to the technical field of door lock control, wherein the integrated execution mechanism comprises a lock body assembly and an integrated controller which are physically integrated, a plurality of position sensors for detecting mechanical movement of the lock body are arranged in the lock body assembly, the integrated controller is electrically connected with signal output ends of the position sensors, and in a static period when the lock body assembly does not execute any unlocking and locking actions, mechanical fingerprint extraction, event feature template matching, preset event triggering and event information reporting operation are executed based on the integrated controller. The invention can fully utilize the potential value of the lock body sensor while realizing the deep integration of the hardware of the electric tail gate system and simplifying the redundant function, expand the dimension of vehicle state perception with low cost, and promote the intelligent monitoring and diagnosis capability of the vehicle in the use process.

Inventors

SHI PENG
YU SIYANG
SHI FUQIANG
ZHU WEI
CAO HUAQI
LI HUAWEI

Assignees

奇瑞智能汽车科技(合肥)有限公司

Dates

Publication Date: 20260512
Application Date: 20260327

Claims (10)

1. The vehicle back door integrated control method based on the integrated execution mechanism is characterized by comprising the following steps of: the integrated executing mechanism comprises a lock body assembly and an integrated controller, wherein the lock body assembly is physically integrated into a whole, a plurality of position sensors for detecting mechanical movement of the lock body are arranged in the lock body assembly, and the integrated controller is electrically connected with signal output ends of the position sensors; during a static period when the lock body assembly does not perform any unlocking and locking actions, the following operations are performed based on the integrated controller: the method comprises the steps of continuously collecting an original time domain waveform generated by the lock body assembly due to the fact that the lock body assembly is subjected to external environment excitation through a position sensor as a passive vibration signal, carrying out time-frequency domain transformation and analysis on the obtained passive vibration signal, and extracting a vibration characteristic vector used for representing the combined action of a current excitation source and a transmission path as a mechanical fingerprint of a current vehicle state; Matching the mechanical fingerprint with an internal pre-stored mechanical fingerprint library, wherein the mechanical fingerprint library comprises a plurality of event feature templates, and each event feature template corresponds to a mechanical fingerprint transmitted to the back door lock position by a vehicle structure when a preset event occurs; when the similarity between the mechanical fingerprint and any event feature template exceeds a preset matching threshold, a corresponding preset event is considered to occur, and event occurrence information is reported to the whole vehicle controller through a communication network of the vehicle.
2. The integrated control method for the vehicle back door based on the integrated execution mechanism of claim 1, wherein the preset events comprise low-speed collision events and scratch events of the vehicle, namely, a low-speed collision event feature template is pre-stored in the mechanical fingerprint library, and the low-speed collision event feature template is obtained by acquiring the feature mechanical fingerprints transmitted to the back door lock position of the vehicle under various typical low-speed collision working conditions through pre-calibration; When the integrated controller judges that a low-speed collision or scratch event occurs, the reported event occurrence information comprises a time stamp of the occurrence of the collision, a collision intensity level determined according to the energy characteristic parameters in the mechanical fingerprint and a predicted position of the occurrence of the collision determined according to the frequency spectrum distribution characteristic parameters in the mechanical fingerprint.
3. The integrated control method for the vehicle back door based on the integrated execution mechanism as set forth in claim 2, wherein the preset event further comprises abnormal vibration and abnormal sound events generated by the vehicle back door and surrounding vehicle body structures, namely, a plurality of abnormal sound event feature templates are prestored in the mechanical fingerprint library, and each abnormal sound event feature template corresponds to a feature mechanical fingerprint generated by loosening of a specific type of structure or wearing of a part; When the integrated controller judges that abnormal vibration or abnormal sound events occur, the reported event occurrence information comprises vehicle working condition information, successfully matched abnormal sound types, duration time and occurrence frequency of corresponding abnormal sound mechanical fingerprints, and is used for constructing a historical evolution map of the structural health degree of the vehicle.
4. The integrated control method for the vehicle back door based on the integrated execution mechanism of claim 1, wherein the integrated controller is connected with a communication network of a vehicle through a single whole vehicle interface, the single whole vehicle interface bears power supply access and communication access functions at the same time, after the integrated controller judges that a corresponding preset event occurs, a triggering mode for triggering the whole vehicle controller through the single whole vehicle interface is selected according to a current power consumption mode of the vehicle, and event occurrence information is reported, and the triggering mode comprises a network message triggering mode and an out-of-band wake-up signal triggering mode.
5. The vehicle back door integrated control method based on the integrated execution mechanism, which is characterized by comprising the steps of carrying out short-time Fourier transform on the passive vibration signals to obtain a time spectrum matrix of the signals, carrying out dimension reduction and feature compression on the time spectrum matrix, extracting multidimensional features comprising a main vibration frequency track, a change curve of energy duty ratio of each frequency band along with time and spectral peak entropy, and jointly forming the vibration feature vector.
6. The integrated control method for the vehicle back door based on the integrated execution mechanism according to claim 1, wherein under the calibration condition that no preset event occurs in the vehicle, the integrated controller is used for continuously collecting and learning the passive vibration signals to construct a background mechanical fingerprint baseline used for representing the structural characteristics of the current vehicle, and when the deviation between the continuously collected mechanical fingerprint and the background mechanical fingerprint baseline continuously exceeds a preset stable threshold, the structural characteristics of the vehicle are judged to be permanently changed, and the corresponding event characteristic template is updated.
7. An integrated control system for a vehicle tailgate based on an integrated actuator, comprising: the integrated executing mechanism comprises a lock body assembly and an integrated controller, wherein the lock body assembly is physically integrated into a whole, a plurality of position sensors for detecting mechanical movement of the lock body are arranged in the lock body assembly, and the integrated controller is electrically connected with signal output ends of the position sensors; The integrated controller includes: The passive monitoring module is used for continuously collecting an original time domain waveform generated by the lock body assembly due to the fact that the lock body assembly is subjected to external environment excitation as a passive vibration signal in a static period when the lock body assembly does not execute any unlocking and locking actions; The fingerprint extraction module is used for carrying out time-frequency domain transformation and analysis on the obtained passive vibration signals and extracting vibration characteristic vectors used for representing the combined action of the current excitation source and the transmission path as mechanical fingerprints of the current vehicle state; the fingerprint library module is used for pre-storing a mechanical fingerprint library, the mechanical fingerprint library comprises a plurality of event feature templates, and each event feature template corresponds to a mechanical fingerprint transmitted to the back door lock position by the vehicle structure when a preset event occurs; The event matching module is used for matching the extracted mechanical fingerprint with an event feature template in the mechanical fingerprint library; And the event reporting module is used for considering that a corresponding preset event occurs when the similarity between the mechanical fingerprint and any event characteristic template exceeds a preset matching threshold value, and reporting event occurrence information to the whole vehicle controller through a communication network of the vehicle.
8. The integrated control system of a vehicle tailgate based on an integrated actuator of claim 7, further comprising a template update module configured to continuously collect and learn the passive vibration signal based on the integrated controller under a calibration condition where no predetermined event occurs in the vehicle, to construct a background mechanical fingerprint baseline for characterizing a current vehicle structural characteristic, and to determine that a permanent change occurs in the vehicle structural characteristic and update a corresponding event feature template when a deviation of the continuously collected mechanical fingerprint from the background mechanical fingerprint baseline continuously exceeds a predetermined stability threshold.
9. A computer-readable storage medium having a program stored thereon, which when executed by a processor, implements the steps of a vehicle tailgate integrated control method based on an integrated actuator as claimed in any one of claims 1 to 7.
10. An electronic device comprising a memory, a processor and a program stored on the memory and executable on the processor, wherein the processor, when executing the program, performs the steps of a vehicle tailgate integrated control method based on an integrated actuator as claimed in any one of claims 1-7.

Description

Integrated control method and system for vehicle back door based on integrated execution mechanism Technical Field The invention belongs to the technical field of door lock control, and particularly relates to a vehicle back door integrated control method and system based on an integrated execution mechanism. Background The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art. At present, an electric tail door system of a vehicle generally adopts a split type architecture, namely an independent back door lock assembly is connected with an independent Electronic Control Unit (ECU) through a wire harness, and the functions of unlocking, sucking and driving an electric stay bar and the like of the tail door are cooperatively completed. However, this architecture has the following technical problems: (1) Under split type framework, the back door lock assembly only serves as a passive actuator, and a position sensor (such as a half lock and a full lock switch) arranged in the back door lock assembly has single function and can only be used for feeding back the limit position state of the lock hook to the ECU. At the same time, the independent ECU often reserves a plurality of hardware interfaces (such as double-stay rod driving, anti-clamping strip interfaces and the like) which are not used in practical application for adapting to different vehicle types, so that the PCB is huge in volume and complex in shell structure. (2) The sensing systems of existing vehicles mainly rely on specially arranged sensors such as acceleration sensors for collision detection, radar and cameras for driving assistance, etc. These sensors typically serve only specific functions (e.g., airbag triggering, autopilot), and existing systems lack low-cost, all-weather monitoring means for frequent but difficult-to-capture events such as low-speed collisions, park scratches, vehicle body structure abnormal sounds, etc. Disclosure of Invention In order to overcome the defects in the prior art, the invention provides the integrated control method and the integrated control system for the vehicle back door based on the integrated execution mechanism, which can fully utilize the potential value of the lock body sensor while realizing the deep integration of the hardware of the electric tail door system and simplifying the redundant function, expand the dimension of vehicle state perception with low cost and improve the intelligent monitoring and diagnosis capability of the vehicle in the use process. To achieve the above object, one or more embodiments of the present invention provide the following technical solutions: the first aspect of the invention provides a vehicle back door integrated control method based on an integrated execution mechanism. An integrated control method for a vehicle back door based on an integrated execution mechanism comprises the following steps: the integrated executing mechanism comprises a lock body assembly and an integrated controller, wherein the lock body assembly is physically integrated into a whole, a plurality of position sensors for detecting mechanical movement of the lock body are arranged in the lock body assembly, and the integrated controller is electrically connected with signal output ends of the position sensors; during a static period when the lock body assembly does not perform any unlocking and locking actions, the following operations are performed based on the integrated controller: the method comprises the steps of continuously collecting an original time domain waveform generated by the lock body assembly due to the fact that the lock body assembly is subjected to external environment excitation through a position sensor as a passive vibration signal, carrying out time-frequency domain transformation and analysis on the obtained passive vibration signal, and extracting a vibration characteristic vector used for representing the combined action of a current excitation source and a transmission path as a mechanical fingerprint of a current vehicle state; Matching the mechanical fingerprint with an internal pre-stored mechanical fingerprint library, wherein the mechanical fingerprint library comprises a plurality of event feature templates, and each event feature template corresponds to a mechanical fingerprint transmitted to the back door lock position by a vehicle structure when a preset event occurs; when the similarity between the mechanical fingerprint and any event feature template exceeds a preset matching threshold, a corresponding preset event is considered to occur, and event occurrence information is reported to the whole vehicle controller through a communication network of the vehicle. Further, the preset events comprise low-speed collision events and scratch events of the vehicle, namely, a low-speed collision event characteristic template is pre-stored in the mechanical fingerprint libra