Vehicle door handle control method, device, system and vehicle

Abstract

This application provides a vehicle door handle control method, device, system, and vehicle, relating to the field of vehicle technology. The method includes: responding to a piezoelectric sensor detecting a vehicle collision, receiving a voltage signal generated by the piezoelectric sensor, determining door unlocking conditions based on the voltage signal, generating a high-level signal if the voltage signal meets the door unlocking conditions, and sending the high-level signal to the door lock motor. The high-level signal is used to control the door lock motor to unlock the vehicle door handle. This application uses a piezoelectric effect sensor for vehicle collision detection. The collision voltage signal from the piezoelectric sensor is transmitted in real-time to each door controller for direct hardware circuit processing, significantly shortening the response time from the occurrence of a collision to door handle unlocking, simplifying the logic link of the unlocking signal, achieving instant detection of vehicle collisions, and rapidly activating the door lock motor to eject the door handle.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to a vehicle door handle control method, device, system, and vehicle. Background Technology

[0002] With the intelligent development of new energy vehicles, the exterior design of automobiles has undergone significant evolution. Hidden door handles have gradually become standard equipment for electric vehicles. Hidden door handles not only give vehicles smoother lines and a more beautiful appearance, but also effectively reduce wind resistance and improve energy efficiency. With the development of vehicle intelligence, users have higher and higher demands for vehicle safety protection. The collision protection function of vehicles has become a key factor affecting safe driving.

[0003] Currently, the collision deployment of concealed door handles in vehicles is first detected by sensors located in the vehicle from different directions. When the vehicle is impacted, the sensors detect the impact force and generate corresponding signals. These signals are first transmitted to the airbag control module. The airbag control module receives the sensor signals and assesses the severity of the impact. Once the airbag control module determines that the impact force exceeds the safe range, it will activate the airbag deployment mechanism to protect the user from impact injuries. At the same time, the airbag control module forwards the impact signal to the body control module. The body control module processes the signals from the airbag control module and triggers the corresponding safety response. Specifically, after receiving the signal from the airbag control module, the body control module sends a command to the door lock control unit to drive the door lock motor to perform the ejection and unlocking operations.

[0004] However, the current collision-sensing door lock ejection mechanism involves a long signal transmission chain from the sensor to the airbag controller to the body control module, which controls the door lock motor to complete the hidden door handle unlocking action. This chain increases signal transmission delay and potential failure points, affecting the effectiveness of the door handle ejection during a collision and further impacting the user's safe driving experience. Summary of the Invention

[0005] In view of this, this application aims to propose a vehicle door handle control method, device, system and vehicle to solve the problem that the long signal transmission link of the collision-sensing door lock ejection mechanism increases the signal transmission delay and potential failure points, affecting the effectiveness of the vehicle door handle ejection in the event of a vehicle collision, and to achieve timely and effective control of the automatic ejection of the door handle.

[0006] According to a first aspect of this application, a vehicle door handle control method is provided, applied to a vehicle door handle control system. The vehicle door handle control system includes a piezoelectric sensor, a door controller, and a door lock motor. The door controller is connected to the piezoelectric sensor and the door lock motor. The method includes:

[0007] In response to the piezoelectric sensor detecting a vehicle collision, the voltage signal generated by the piezoelectric sensor is received;

[0008] The voltage signal is used to determine the door unlocking condition. If the voltage signal meets the door unlocking condition, a high-level signal is generated.

[0009] The high-level signal is sent to the door lock motor; the high-level signal is used to control the door lock motor to unlock the vehicle door handle.

[0010] Optionally, the step of receiving a voltage signal generated by the piezoelectric sensor in response to the piezoelectric sensor detecting a vehicle collision includes:

[0011] Multiple piezoelectric sensors pre-deployed in the vehicle are monitored; wherein the piezoelectric sensors are used to detect vehicle collisions and generate voltage signals.

[0012] In response to detecting that at least one of the piezoelectric sensors generates a voltage signal, the voltage signal of the piezoelectric sensor is received.

[0013] Optionally, the step of determining the door unlocking condition based on the voltage signal, and generating a high-level signal when the voltage signal meets the door unlocking condition, includes:

[0014] Determine the average voltage value of the voltage signal;

[0015] The average voltage value of the voltage signal is compared with a preset threshold voltage value to determine whether the voltage signal meets the door unlocking conditions.

[0016] If the average voltage value is greater than or equal to the preset threshold voltage value, then the voltage signal is determined to meet the door unlocking condition, and a high-level signal is obtained.

[0017] Optionally, comparing the average voltage value of the voltage signal with a preset threshold voltage value to determine whether the voltage signal meets the door unlocking conditions includes:

[0018] A voltage comparator is used to compare the average voltage value of the voltage signal with a preset threshold voltage value to generate a comparison result;

[0019] Based on the comparison result, determine whether the voltage signal meets the door unlocking conditions, and generate the corresponding level signal.

[0020] Optionally, after comparing the average voltage value of the voltage signal with a preset threshold voltage value to determine whether the voltage signal meets the door unlocking conditions, the method further includes:

[0021] If the average voltage value is less than the preset threshold voltage value, it is determined that the voltage signal does not meet the door unlocking condition, and a low-level signal is obtained;

[0022] The low-level signal is used to control the door lock motor to maintain the locked state of the vehicle door handle.

[0023] Optionally, sending the high-level signal to the door lock motor; the high-level signal is used to control the door lock motor to unlock the vehicle door handle, including:

[0024] The high-level signal is sent to the door lock motor, and a vehicle door handle unlocking command is generated;

[0025] Using the vehicle door handle unlocking command, the door lock motor is controlled to unlock the vehicle door handle, ensuring that the vehicle door handle is safely ejected.

[0026] Optionally, before generating a high-level signal when the voltage signal meets the door unlocking condition determination, the method further includes:

[0027] The voltage signal is preprocessed to obtain a processed voltage signal; wherein the preprocessing includes signal amplification and filtering.

[0028] According to a second aspect of this application, a vehicle door handle control device is provided, applied to a vehicle door handle control system. The vehicle door handle control system includes a piezoelectric sensor, a door controller, and a door lock motor. The door controller is connected to the piezoelectric sensor and the door lock motor. The device includes:

[0029] The collision detection module is used to receive the voltage signal generated by the piezoelectric sensor in response to the piezoelectric sensor detecting a vehicle collision;

[0030] The signal judgment module is used to judge the door unlocking condition of the voltage signal, and generate a high-level signal when the voltage signal meets the door unlocking condition;

[0031] The unlocking control module is used to send the high-level signal to the door lock motor; the high-level signal is used to control the door lock motor to unlock the vehicle door handle.

[0032] According to another aspect of this application, a vehicle door handle control system is also provided, the vehicle door handle control system including a piezoelectric sensor, a door controller, and a door lock motor, the door controller being connected to the piezoelectric sensor and the door lock motor, the system comprising:

[0033] The door controller is configured to respond to the piezoelectric sensor detecting a vehicle collision, receive the voltage signal transmitted by the piezoelectric sensor, determine the door unlocking condition based on the voltage signal, and generate a high-level signal when the voltage signal meets the door unlocking condition, and send the high-level signal to the door lock motor.

[0034] The piezoelectric sensors are installed in multiple preset areas of the vehicle to detect collisions.

[0035] The door lock motor is used to unlock the vehicle door handle in response to the high-level signal.

[0036] According to another aspect of this application, a vehicle is also provided, the vehicle including the vehicle door handle control system as described above, which, when executed, implements the steps of the vehicle door handle control method as described above.

[0037] The vehicle door handle control method provided in this application is applied to a vehicle door handle control system. The vehicle door handle control system includes a piezoelectric sensor, a door controller, and a door lock motor. The door controller is connected to the piezoelectric sensor and the door lock motor. In response to a vehicle collision detected by the piezoelectric sensor, it receives the voltage signal generated by the sensor, determines the door unlocking condition based on the voltage signal, and generates a high-level signal when the voltage signal meets the unlocking condition. This high-level signal is sent to the door lock motor to control the door lock motor to unlock the door handle. This application uses a piezoelectric effect sensor for vehicle collision detection. The collision voltage signal from the piezoelectric sensor is transmitted in real time to each door controller for direct hardware circuit processing, significantly shortening the response time from the occurrence of a collision to door handle unlocking. By simplifying the logic link of the unlocking signal and reducing dependence on the airbag controller and body controller, it reduces the problem of failure of the airbag controller and body control module during a collision, thus enabling real-time detection of vehicle collisions and rapid activation of the door lock motor to eject the door handle.

[0038] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0039] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0040] Figure 1 This is a flowchart illustrating the steps of a vehicle door handle control method provided in an embodiment of this application;

[0041] Figure 2 yes Figure 1 A flowchart of step 101 in the vehicle door handle control method provided in the embodiments of this application;

[0042] Figure 3 yes Figure 1 A flowchart of step 102 in the vehicle door handle control method provided in the embodiments of this application;

[0043] Figure 4 yes Figure 1 A flowchart of step 103 in the vehicle door handle control method provided in the embodiments of this application;

[0044] Figure 5 This is a flowchart of another vehicle door handle control method provided in an embodiment of this application;

[0045] Figure 6 This is a schematic diagram of the structure of a vehicle door handle control device provided in an embodiment of this application;

[0046] Figure 7 This is a schematic diagram of a vehicle door handle control system provided in an embodiment of this application. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the various embodiments of this application will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been presented in the various embodiments of this application to enable readers to better understand this application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in this application can be implemented. The division of the various embodiments below is for the convenience of description and should not constitute any limitation on the specific implementation of this application. The various embodiments can be combined with and referenced by each other without contradiction.

[0048] Reference Figure 1This document illustrates a flowchart of the steps of a vehicle door handle control method provided in an embodiment of this application. The method is applied to a vehicle door handle control system, which includes a piezoelectric sensor, a door controller, and a door lock motor. The door controller is connected to the piezoelectric sensor and the door lock motor. The method may include:

[0049] Step 101: In response to the piezoelectric sensor detecting a vehicle collision, receive the voltage signal generated by the piezoelectric sensor.

[0050] In this embodiment, to address the problem that the current signal transmission chain from the sensor to the airbag controller and then to the body control module for unlocking and ejecting the door handle is too long, increasing signal transmission delay and potential failure points, affecting the effectiveness of the door handle ejection during a vehicle collision, and impacting the user's safe driving experience, this embodiment uses a piezoelectric sensor for vehicle collision detection. The collision voltage signal from the piezoelectric sensor is transmitted in real time to each door controller for direct hardware circuit processing, significantly shortening the response time from the occurrence of a collision to the door handle unlocking. By simplifying the logic chain of the unlocking signal and reducing dependence on the airbag controller and body control module, the problem of failure of the airbag controller and body control module during a collision, which could prevent the issuance of an unlocking signal, is reduced. This enables real-time detection of vehicle collisions and can quickly activate the door lock motor to eject the door handle.

[0051] Specifically, in this embodiment, the vehicle door handle control system includes a piezoelectric sensor, a door controller, and a door lock motor. The door controller is connected to the piezoelectric sensor and the door lock motor. In response to the piezoelectric sensor detecting a vehicle collision, the door controller receives the voltage signal generated by the piezoelectric sensor. When a vehicle collision occurs, at least one piezoelectric sensor detects mechanical stress and generates an electric charge. These charges are converted into voltage signals through the piezoelectric effect and received by the door controller. The piezoelectric sensors are deployed on the inner side of the fenders on both sides of the vehicle body, below the headlight bracket, and on both sides of the engine radiator bracket. By utilizing the fast response characteristics of the piezoelectric effect sensor, real-time detection of vehicle collisions can be achieved.

[0052] Step 102: Determine the door unlocking condition based on the voltage signal. If the voltage signal meets the door unlocking condition, generate a high-level signal.

[0053] In this embodiment, after the door controller receives voltage signals generated by multiple piezoelectric sensors, it determines the door unlocking conditions based on the voltage signals. Specifically, the door unlocking conditions are determined by comparing the voltage signals with a preset threshold voltage to determine whether the voltage signals meet the conditions for popping out the hidden door handle. The door controller determines the average voltage value of the voltage signals and compares it with the preset threshold voltage value to determine whether the voltage signals meet the door unlocking conditions. If the average voltage value is greater than or equal to the preset threshold voltage value, it is determined that the voltage signals meet the door unlocking conditions, and a high-level signal is obtained.

[0054] Specifically, after receiving the voltage signal generated by the piezoelectric sensor, the door controller first processes the voltage signal to calculate the average voltage value. The door controller then compares the calculated average voltage value with a preset threshold voltage value. This preset threshold voltage value is determined during system design based on a large amount of crash test data. It is used to ensure that the door handle is not falsely triggered in the event of a minor collision, while reliably triggering the door handle to pop out in the event of a severe collision. This embodiment does not specify the exact value of the threshold voltage value. If the average voltage value is greater than or equal to the preset threshold voltage value, the door controller determines that the voltage signal meets the door unlocking conditions and generates a high-level signal. This high-level signal will be used to trigger the door lock motor to unlock.

[0055] Step 103: Send a high-level signal to the door lock motor; the high-level signal is used to control the door lock motor to unlock the vehicle door handle.

[0056] In this embodiment, when the voltage signal meets the door unlocking conditions, the door controller generates a high-level signal and sends the high-level signal to the door lock motor. After receiving the high-level signal, the door lock motor activates the control action of popping out the door handle, thereby popping out the door handle. The door controller can generate a vehicle door handle unlocking command for the door lock motor based on the high-level signal. This command will be used to control the door lock motor to perform the unlocking action. After receiving the high-level signal or the unlocking command, the door lock motor performs the unlocking action and pops out the hidden door handle.

[0057] The vehicle door handle control method provided in this application is applied to a vehicle door handle control system. The vehicle door handle control system includes a piezoelectric sensor, a door controller, and a door lock motor. The door controller is connected to the piezoelectric sensor and the door lock motor. In response to a vehicle collision detected by the piezoelectric sensor, it receives the voltage signal generated by the sensor, determines the door unlocking condition based on the voltage signal, and generates a high-level signal when the voltage signal meets the unlocking condition. This high-level signal is sent to the door lock motor to control the door lock motor to unlock the door handle. This application uses a piezoelectric effect sensor for vehicle collision detection. The collision voltage signal from the piezoelectric sensor is transmitted in real time to each door controller for direct hardware circuit processing, significantly shortening the response time from the occurrence of a collision to door handle unlocking. By simplifying the logic link of the unlocking signal and reducing dependence on the airbag controller and body controller, it reduces the problem of failure of the airbag controller and body control module during a collision, thus enabling real-time detection of vehicle collisions and rapid activation of the door lock motor to eject the door handle.

[0058] Furthermore, refer to Figure 2 , showed Figure 1 A flowchart of step 101 in a vehicle door handle control method is provided. This method is basically the same as the vehicle door handle control method provided in the first embodiment of this application. Step 101 may include:

[0059] Step 201: Monitor multiple piezoelectric sensors pre-deployed on the vehicle; wherein the piezoelectric sensors are used to detect vehicle collisions and generate voltage signals.

[0060] Step 202: In response to detecting that at least one piezoelectric sensor generates a voltage signal, receive the voltage signal from the piezoelectric sensor.

[0061] It should be noted that in this embodiment, piezoelectric sensors are deployed at multiple key locations on the vehicle to detect vehicle collisions and generate voltage signals. Specifically, the piezoelectric sensors can be deployed on the inner side of the fenders on both sides of the vehicle body, below the headlight brackets, and on both sides of the engine radiator brackets. This embodiment uses a collision sensor based on the piezoelectric effect for vehicle collision detection. The piezoelectric crystal used in this sensor is typically made of quartz or ceramic. When the vehicle is involved in a collision, the piezoelectric crystal inside the sensor changes its output voltage under the pressure generated by the collision. The intensity of the collision can be determined based on the strength of the voltage signal. The piezoelectric effect refers to the effect that the piezoelectric crystal changes its shape under pressure, causing its output voltage to change. Because the piezoelectric sensor can detect the dynamic pressure changes generated by the collision in a very short time and convert mechanical energy into an electrical signal,

[0062] It should be noted that the piezoelectric sensor in this embodiment can integrate a temperature compensation circuit to ensure accurate collision detection under different ambient temperatures. In addition, the piezoelectric sensor can adopt a redundant design to ensure that other piezoelectric sensors can still work normally when one piezoelectric sensor fails. No specific limitations are made here.

[0063] Specifically, when a vehicle collides, at least one piezoelectric sensor detects mechanical stress and generates an electric charge. These charges are converted into voltage signals through the piezoelectric effect and are received by the door controller. This embodiment can employ multi-sensor fusion, combining signals from multiple sensors for comprehensive judgment to improve the accuracy and reliability of collision detection.

[0064] The door controller of this application monitors multiple piezoelectric sensors pre-deployed in the vehicle. When a collision occurs, it monitors and receives voltage signals generated by at least one piezoelectric sensor. In vehicle collision detection, the piezoelectric sensor can instantly detect the collision and generate voltage signals, which are transmitted to the door controller at the speed of light through a signal line, thereby shortening the collision response time and improving the efficiency of vehicle door handle control.

[0065] Furthermore, refer to Figure 3 , showed Figure 1 A flowchart of step 102 in a vehicle door handle control method is provided. This method is basically the same as the vehicle door handle control method provided in the first embodiment of this application. Step 102 may include:

[0066] Step 301: Determine the average voltage value of the voltage signal.

[0067] Step 302: Compare the average voltage value of the voltage signal with the preset threshold voltage value to determine whether the voltage signal meets the door unlocking conditions.

[0068] Step 303: If the average voltage value is greater than or equal to the preset threshold voltage value, then the voltage signal is determined to meet the door unlocking condition, and a high-level signal is obtained.

[0069] It should be noted that in this embodiment, after the door controller receives voltage signals generated by multiple piezoelectric sensors, the door controller first processes these voltage signals to calculate the average voltage value. The purpose of determining the average voltage value of the voltage signals is to eliminate the noise and error of individual piezoelectric sensors and improve the stability and reliability of the control system.

[0070] In this embodiment, in order to further improve the accuracy of the average voltage value, a weighted average method can be used, assigning different weights according to the location and importance of the piezoelectric sensor. For example, sensors at the front and sides can be assigned higher weights because collisions at these locations have a greater impact on vehicle safety. No specific limitation is made here.

[0071] Specifically, in this embodiment, the door controller compares the calculated average voltage value of the voltage signal with a preset threshold voltage value. This preset threshold voltage value is determined during system design based on extensive collision test data. It ensures that the door handle will not be falsely triggered in minor collisions, while reliably triggering its ejection in severe collisions. This embodiment does not specify the exact value of the threshold voltage. If the average voltage value is greater than or equal to the preset threshold voltage value, the door controller determines that the voltage signal meets the door unlocking conditions and generates a high-level signal. This high-level signal will be used to trigger the door lock motor's unlocking action.

[0072] This application embodiment simplifies the logic chain of the unlocking signal by directly performing threshold judgment on the voltage signal of the collision detection, reduces the dependence on the airbag controller and the body controller, realizes real-time detection of vehicle collision, and can quickly activate the door lock motor to make the door handle pop out.

[0073] Specifically, step 302 compares the average voltage value of the voltage signal with a preset threshold voltage value to determine whether the voltage signal meets the door unlocking conditions. This may include the following steps:

[0074] First, a voltage comparator is used to compare the average voltage value of the voltage signal with a preset threshold voltage value to generate a comparison result;

[0075] Secondly, based on the comparison result, it is determined whether the voltage signal meets the door unlocking conditions, and a level signal corresponding to the comparison result is generated.

[0076] It should be noted that in this embodiment, the door controller uses a voltage comparator to compare the calculated average voltage value with a preset threshold voltage value. The voltage comparator is an electronic circuit used to compare the magnitudes of two voltage signals and output a corresponding level signal. In this system, the voltage comparator compares the average voltage value with the preset threshold voltage value to generate a comparison result. To improve the stability and reliability of the system, a voltage comparator with hysteresis characteristics can be used. This design can delay changes in the output signal, avoiding instability or jitter in the output signal due to instantaneous changes in the input signal, and reducing the probability of false detection.

[0077] Specifically, based on the comparison results generated by the voltage comparator, the door controller determines whether the voltage signal meets the door unlocking conditions. If the average voltage value is greater than or equal to the preset threshold voltage value, the voltage signal meets the door unlocking conditions, and the door controller generates a high-level signal; if the average voltage value is less than the preset threshold voltage value, the voltage signal does not meet the door unlocking conditions, and the door controller generates a low-level signal.

[0078] This application embodiment determines whether the voltage signal meets the door unlocking conditions by judging the voltage value of the voltage signal, thereby controlling the door handle to unlock. The hardware circuitry is used for real-time analysis and judgment of collision signals, which improves the system's response speed and reliability.

[0079] Specifically, after comparing the average voltage value of the voltage signal with a preset threshold voltage value to determine whether the voltage signal meets the door unlocking conditions, the process may further include:

[0080] If the average voltage value is less than the preset threshold voltage value, it is determined that the voltage signal does not meet the door unlocking condition, and a low-level signal is obtained;

[0081] The low-level signal is used to control the door lock motor to maintain the locked state of the vehicle door handle.

[0082] It should be noted that in the above steps, the door controller determines whether the voltage signal meets the door unlocking conditions. If the voltage comparator shows that the average voltage value is less than the preset threshold voltage value, the door controller determines that the voltage signal does not meet the door unlocking conditions and generates a low-level signal. The low-level signal will be used to control the door lock motor to maintain the locked state of the vehicle door handle. The door controller sends the low-level signal to the door lock motor. After receiving the signal, the door lock motor maintains the locked state of the vehicle door handle to prevent the door handle from accidentally popping out in non-emergency situations.

[0083] In this embodiment, to ensure system stability, a confirmation step can be added after a low-level signal is generated to ensure that the door lock motor has received the signal and performed the corresponding action. Alternatively, a feedback mechanism can be added after the door lock motor receives the low-level signal to ensure that the door handle has been successfully locked. In addition, the system can be designed to automatically lock the door handle during vehicle startup or driving to further improve security. These details will not be elaborated here.

[0084] This application embodiment controls the door lock motor to maintain the locked state of the vehicle door handle when the voltage signal does not meet the door unlocking conditions, preventing the door handle from accidentally popping out in non-emergency situations, thus enhancing the reliability of vehicle door handle control and further improving the driving safety experience.

[0085] Furthermore, refer to Figure 4 , showedFigure 1 A flowchart of step 103 in a vehicle door handle control method is provided. This method is basically the same as the vehicle door handle control method provided in the first embodiment of this application. Step 103 may include:

[0086] Step 401: Send a high-level signal to the door lock motor and generate a vehicle door handle unlocking command.

[0087] Step 402: Use the vehicle door handle unlocking command to control the door lock motor to unlock the vehicle door handle and ensure that the vehicle door handle is safely ejected.

[0088] It should be noted that in this embodiment, when the voltage comparator shows that the average voltage value is greater than or equal to the preset threshold voltage value, the door controller generates a high-level signal and sends the signal to the door lock motor. At the same time, the door controller generates a door handle unlocking command, which is used to control the door lock motor to perform the unlocking action. After receiving the high-level signal and the unlocking command, the door lock motor performs the unlocking action and pops out the hidden door handle. The door controller monitors the pop-out status of the door handle through the position feedback sensor to ensure that the door handle pops out safely.

[0089] This embodiment of the application sends a high-level signal to the door lock motor to control the door lock motor to unlock the vehicle door handle and determine that the vehicle door handle has been safely ejected. It eliminates the need for signal transmission and program judgment via CAN signal, greatly reducing the time required for collision detection, realizing real-time detection of vehicle collisions, and quickly activating the door lock motor to eject the door handle.

[0090] Reference Figure 5 This diagram illustrates a flowchart of another vehicle door handle control method provided in an embodiment of this application. This method is essentially the same as the vehicle door handle control method provided in the first embodiment of this application, except that the method may further include:

[0091] Step 101: In response to the piezoelectric sensor detecting a vehicle collision, receive the voltage signal generated by the piezoelectric sensor.

[0092] Step 104: Preprocess the voltage signal to obtain the processed voltage signal; wherein, the preprocessing includes signal amplification and filtering.

[0093] In this embodiment, the door controller preprocesses the received voltage signal, including signal amplification and filtering. Signal amplification is the key process of converting and enhancing the weak charge signal generated by the piezoelectric sensor into a measurable voltage signal. Filtering removes low-frequency noise and improves the signal-to-noise ratio by using a high-pass filter. To further improve the accuracy of the signal, adaptive filtering technology can be used to dynamically adjust the filtering parameters according to the current environmental conditions and signal characteristics. In addition, the signal amplifier can be designed with low noise to reduce noise introduction during the amplification process.

[0094] Specifically, signal amplification is the crucial process of converting and amplifying the weak charge signal generated by the piezoelectric sensor into a measurable voltage signal. Piezoelectric sensors generate extremely small charges due to mechanical stress after an impact, typically ranging in magnitude from picocoulomb (pC) to nanocoulomb (nC). Due to their weak nature, they require effective amplification through specific circuitry. In this system, a dedicated charge amplifier is integrated to achieve this conversion. Filtering is used to improve signal waveform quality, including the use of a high-pass filter to remove low-frequency noise. At the moment of impact, the piezoelectric sensor captures high-frequency signals due to the rapid vibration and impact of the object. These high-frequency signals contain useful information about the impact intensity and characteristics. Filtering reduces noise and improves the signal-to-noise ratio. The amplified and filtered voltage signal is then further processed by a voltage comparator.

[0095] Step 102: Determine the door unlocking condition based on the voltage signal. If the voltage signal meets the door unlocking condition, generate a high-level signal.

[0096] Step 103: Send a high-level signal to the door lock motor; the high-level signal is used to control the door lock motor to unlock the vehicle door handle.

[0097] Steps 101 to 103 described above are the same as those previously mentioned and will not be repeated here.

[0098] Compared with the prior art, the embodiments of this application, based on the beneficial effects brought about by the first embodiment, after receiving the voltage signal generated by the piezoelectric sensor, perform preprocessing, signal amplification and filtering on the voltage signal to obtain the processed voltage signal, which greatly improves the waveform quality of the collision detection voltage signal, so as to facilitate further processing by the subsequent voltage comparator and improve the accuracy of door handle unlocking judgment.

[0099] Reference Figure 6This diagram illustrates a structural schematic of a vehicle door handle control device according to an embodiment of this application. The device is applied to a vehicle door handle control system, which includes a piezoelectric sensor, a door controller, and a door lock motor. The door controller is connected to the piezoelectric sensor and the door lock motor. The device includes:

[0100] Collision detection module 501 is used to receive the voltage signal generated by the piezoelectric sensor in response to the piezoelectric sensor detecting a vehicle collision;

[0101] The signal judgment module 502 is used to judge the door unlocking condition of the voltage signal, and generate a high-level signal when the voltage signal meets the door unlocking condition.

[0102] The control unlocking module 503 is used to send the high-level signal to the door lock motor; the high-level signal is used to control the door lock motor to unlock the vehicle door handle.

[0103] Furthermore, the collision detection module 501 includes:

[0104] A monitoring submodule is used to monitor multiple piezoelectric sensors pre-deployed in the vehicle; wherein the piezoelectric sensors are used to detect vehicle collisions and generate voltage signals;

[0105] A receiving submodule is configured to receive the voltage signal of the piezoelectric sensor in response to detecting that at least one of the piezoelectric sensors generates a voltage signal.

[0106] Furthermore, the signal determination module 502 includes:

[0107] A voltage submodule is used to determine the average voltage value of the voltage signal;

[0108] The voltage comparison submodule is used to compare the average voltage value of the voltage signal with a preset threshold voltage value to determine whether the voltage signal meets the door unlocking conditions.

[0109] The first determining submodule is used to determine that the voltage signal meets the door unlocking condition and obtain a high-level signal if the average voltage value is greater than or equal to the preset threshold voltage value.

[0110] Furthermore, the voltage comparison submodule includes:

[0111] The comparison unit is used to compare the average voltage value of the voltage signal with a preset threshold voltage value using a voltage comparator, and generate a comparison result;

[0112] The generation unit is used to determine whether the voltage signal meets the door unlocking conditions based on the comparison result, and to generate a level signal corresponding to the comparison result.

[0113] Furthermore, the signal determination module 502 also includes:

[0114] The second determining submodule is used to determine that the voltage signal does not meet the door unlocking condition if the average voltage value is less than the preset threshold voltage value, and to obtain a low-level signal.

[0115] The first control submodule is used to control the door lock motor to maintain the locked state of the vehicle door handle using the low-level signal.

[0116] Furthermore, the control unlocking module 503 includes:

[0117] The transmitting submodule is used to send the high-level signal to the door lock motor and generate a vehicle door handle unlocking command;

[0118] The second control submodule is used to control the door lock motor to unlock the vehicle door handle using the vehicle door handle unlocking command, and to ensure that the vehicle door handle is safely ejected.

[0119] Furthermore, the device also includes:

[0120] The signal processing module is used to preprocess the voltage signal to obtain a processed voltage signal; wherein the preprocessing includes signal amplification and filtering.

[0121] The vehicle door handle control method provided in this application is applied to a vehicle door handle control system. The vehicle door handle control system includes a piezoelectric sensor, a door controller, and a door lock motor. The door controller is connected to the piezoelectric sensor and the door lock motor. In response to a vehicle collision detected by the piezoelectric sensor, it receives the voltage signal generated by the sensor, determines the door unlocking condition based on the voltage signal, and generates a high-level signal when the voltage signal meets the unlocking condition. This high-level signal is sent to the door lock motor to control the door lock motor to unlock the door handle. This application uses a piezoelectric effect sensor for vehicle collision detection. The collision voltage signal from the piezoelectric sensor is transmitted in real time to each door controller for direct hardware circuit processing, significantly shortening the response time from the occurrence of a collision to door handle unlocking. By simplifying the logic link of the unlocking signal and reducing dependence on the airbag controller and body controller, it reduces the problem of failure of the airbag controller and body control module during a collision, thus enabling real-time detection of vehicle collisions and rapid activation of the door lock motor to eject the door handle.

[0122] This application also provides a vehicle door handle control system, see reference. Figure 7 , Figure 7 This is a schematic diagram of a vehicle door handle control system provided in an embodiment of this application. The vehicle door handle control system includes a piezoelectric sensor, a door controller, and a door lock motor. The door controller is connected to the piezoelectric sensor and the door lock motor. The system includes:

[0123] The door controller is configured to respond to the piezoelectric sensor detecting a vehicle collision, receive the voltage signal transmitted by the piezoelectric sensor, determine the door unlocking condition based on the voltage signal, and generate a high-level signal when the voltage signal meets the door unlocking condition, and send the high-level signal to the door lock motor.

[0124] The piezoelectric sensors are installed in multiple preset areas of the vehicle to detect collisions.

[0125] The door lock motor is used to unlock the vehicle door handle in response to the high-level signal.

[0126] Specifically, in the vehicle door handle control system provided in this application embodiment, piezoelectric sensors are installed in multiple preset areas of the vehicle, such as the inner side of the fenders on both sides of the vehicle body, below the headlight bracket, and on both sides of the engine radiator bracket. The piezoelectric sensors can detect dynamic pressure changes caused by a collision in a very short time and convert mechanical energy into electrical signals. The door controller is connected to the piezoelectric sensors and the door lock motor. In response to the piezoelectric sensors detecting a vehicle collision, it receives the voltage signal transmitted by the piezoelectric sensors, judges the door unlocking conditions based on the voltage signal, and generates a high-level signal when the voltage signal meets the door unlocking conditions. The high-level signal is then sent to the door lock motor. The door lock motor is used to unlock the vehicle door handle in response to the high-level signal. After receiving the high-level signal, the door lock motor performs the unlocking action, popping out the hidden door handle so that people inside and outside the vehicle can quickly open the door.

[0127] The vehicle door handle control system provided in this application uses a piezoelectric effect sensor for vehicle collision detection. The collision voltage signal from the piezoelectric sensor is transmitted in real time to each door controller for direct processing by the hardware circuit. This significantly shortens the response time from the occurrence of a collision to the unlocking of the door handle. By simplifying the logic link of the unlocking signal, the dependence on the airbag controller and body controller is reduced, thereby reducing the problem of failure of the airbag controller and body control module during the collision process, which may result in the inability to send an unlocking signal. This enables real-time detection of vehicle collisions and can quickly activate the door lock motor to pop out the door handle.

[0128] In another embodiment provided in this application, a vehicle is also provided, the vehicle including the vehicle door handle control system of the above embodiments, which, when running on the vehicle, causes the vehicle to perform any of the vehicle door handle control methods described in the above embodiments.

[0129] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid state disk (SSD)).

[0130] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0131] The various embodiments in this specification are described in a related manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0132] The above description is merely a preferred embodiment of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application are included within the scope of protection of this application.

Claims

1. A method for controlling a vehicle door handle, characterized in that, An application is made in a vehicle door handle control system, the vehicle door handle control system including a piezoelectric sensor, a door controller, and a door lock motor, the door controller being connected to the piezoelectric sensor and the door lock motor, the method comprising: The door controller receives a voltage signal generated by the piezoelectric sensor in response to the piezoelectric sensor detecting a vehicle collision. The door controller determines the door unlocking condition based on the voltage signal. If the voltage signal meets the door unlocking condition, it generates a high-level signal. The door unlocking condition is determined by comparing the voltage signal with a preset threshold voltage value to determine whether the voltage signal meets the condition for ejecting the vehicle door handle. The comparison between the voltage signal and the preset threshold voltage value is performed by a voltage comparator. The door controller sends the high-level signal to the door lock motor; the high-level signal is used to control the door lock motor to unlock the vehicle door handle.

2. The method according to claim 1, characterized in that, The step of receiving a voltage signal generated by the piezoelectric sensor in response to the piezoelectric sensor detecting a vehicle collision includes: Multiple piezoelectric sensors pre-deployed in the vehicle are monitored; wherein the piezoelectric sensors are used to detect vehicle collisions and generate voltage signals. In response to detecting that at least one of the piezoelectric sensors generates a voltage signal, the voltage signal of the piezoelectric sensor is received.

3. The method according to claim 1, characterized in that, The step of determining the door unlocking condition based on the voltage signal, and generating a high-level signal when the voltage signal meets the door unlocking condition, includes: Determine the average voltage value of the voltage signal; The average voltage value of the voltage signal is compared with a preset threshold voltage value to determine whether the voltage signal meets the door unlocking conditions. If the average voltage value is greater than or equal to the preset threshold voltage value, then the voltage signal is determined to meet the door unlocking condition, and a high-level signal is obtained.

4. The method according to claim 3, characterized in that, The step of comparing the average voltage value of the voltage signal with a preset threshold voltage value to determine whether the voltage signal meets the door unlocking conditions includes: A voltage comparator is used to compare the average voltage value of the voltage signal with a preset threshold voltage value to generate a comparison result; Based on the comparison result, determine whether the voltage signal meets the door unlocking conditions, and generate the corresponding level signal.

5. The method according to claim 3, characterized in that, After comparing the average voltage value of the voltage signal with a preset threshold voltage value to determine whether the voltage signal meets the door unlocking conditions, the method further includes: If the average voltage value is less than the preset threshold voltage value, it is determined that the voltage signal does not meet the door unlocking condition, and a low-level signal is obtained; The low-level signal is used to control the door lock motor to maintain the locked state of the vehicle door handle.

6. The method according to claim 1, characterized in that, The step of sending the high-level signal to the door lock motor; the high-level signal is used to control the door lock motor to unlock the vehicle door handle, including: The high-level signal is sent to the door lock motor, and a vehicle door handle unlocking command is generated; Using the vehicle door handle unlocking command, the door lock motor is controlled to unlock the vehicle door handle, ensuring that the vehicle door handle is safely ejected.

7. The method according to claim 1, characterized in that, The step of determining the door unlocking condition based on the voltage signal, before generating a high-level signal when the voltage signal meets the door unlocking condition, further includes: The voltage signal is preprocessed to obtain a processed voltage signal; wherein the preprocessing includes signal amplification and filtering.

8. A vehicle door handle control system, characterized in that, The vehicle door handle control system includes a piezoelectric sensor, a door controller, and a door lock motor. The door controller is connected to the piezoelectric sensor and the door lock motor. The system includes: The door controller is configured to, in response to the piezoelectric sensor detecting a vehicle collision, receive a voltage signal transmitted by the piezoelectric sensor, determine the door unlocking condition based on the voltage signal, and generate a high-level signal when the voltage signal meets the door unlocking condition, and send the high-level signal to the door lock motor; wherein, the door unlocking condition is determined by comparing the voltage signal with a preset threshold voltage value to determine whether the voltage signal meets the condition for ejecting the vehicle door handle, and the comparison between the voltage signal and the preset threshold voltage value is performed by a voltage comparator; The piezoelectric sensors are installed in multiple preset areas of the vehicle to detect collisions. The door lock motor is used to unlock the vehicle door handle in response to the high-level signal.

9. A vehicle, characterized in that, The vehicle includes the vehicle door handle control system as described in claim 8.

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