阅读说明：本技术 一种隐藏式车门把手控制装置、系统及控制方法 (Hidden door handle control device, system and control method ) 是由 江凯敏 莫七华 朱光欢 于 2020-04-16 设计创作，主要内容包括：本发明公开一种隐藏式车门把手控制装置、系统及控制方法,其中,隐藏式车门把手控制装置包括：微控制器和与其电连接的第一驱动单元,所述微控制器用于根据从CAN总线接收车门把手展开或回缩的指令,控制所述第一驱动单元输出驱动信号,驱动车门把手电机以使车门把手展开或回缩,并在车门把手展开或回缩过程中诊断车门把手电机的工况,如果发生异常工况则发送故障信息至CAN总线报警并停止驱动。本发明架构简单,通过车上现有的CAN信息进行交互控制,非常节约成本；自带过流短路过热诊断功能,在负载发生过流短路过故障时,自动切断输出对电机进行保护,方便故障的定位及负载的更新维护；提高了车门把手破冰能力,避免冬天被冰雪冻住。(The invention discloses a hidden door handle control device, a system and a control method, wherein the hidden door handle control device comprises: the microcontroller is used for receiving a door handle unfolding or retracting instruction from the CAN bus, controlling the first driving unit to output a driving signal, driving the door handle motor to unfold or retract the door handle, diagnosing the working condition of the door handle motor in the door handle unfolding or retracting process, and sending fault information to the CAN bus to alarm and stop driving if abnormal working conditions occur. The invention has simple structure, carries out interactive control through the existing CAN information on the vehicle and greatly saves the cost; the device has an overcurrent, short-circuit and overheat diagnosis function, and when the load has overcurrent, short-circuit and overheat faults, the output is automatically cut off to protect the motor, so that the fault location and the load updating and maintenance are facilitated; the door handle icebreaking capacity is improved, and the door handle is prevented from being frozen by ice and snow in winter.)

1. A hidden door handle control device, comprising: the first driving unit is also used for diagnosing the working condition of the door handle motor in the process of unfolding or retracting the door handle, sending fault information to the microcontroller if abnormal working conditions occur, and sending the fault information to the CAN bus by the microcontroller to alarm and stop driving.

2. The hidden vehicle door handle control as in claim 1, wherein the commands received by the microcontroller from the CAN bus comprise: when any one of the doors is opened and the vehicle speed is less than a preset threshold value, a door handle unfolding instruction is sent by a vehicle body control module; or when all the vehicle doors are closed and the vehicle speed is greater than a preset threshold value, a vehicle door handle retracting command is sent by the vehicle body control module; or the wireless key receives an unlocking instruction or a locking instruction sent by the module.

3. The hidden door handle control apparatus of claim 1, wherein the microcontroller is configured to stop driving if a deployment-to-position signal or a retraction-to-position signal of the door handle is detected during at least one drive cycle; if the unfolding in-position signal or the retracting in-position signal of the vehicle door handle cannot be detected in at least one driving period, a fault code is recorded and sent to the CAN bus for alarming.

4. The hidden door handle control device as claimed in claim 1, further comprising a second driving unit for outputting a driving signal to reversely drive the door-closing motor to release the door when the microcontroller does not detect the door handle deployment in-place signal for at least one driving cycle.

5. The hidden door handle control device according to any one of claims 1 to 4, wherein the first driving unit is specifically configured to detect the magnitude of a door handle motor load current during door handle deployment or retraction, and to send a fault message to the microcontroller via the SPI bus when an overcurrent short or motor overheat protection occurs.

6. A hidden vehicle door handle control method, comprising:

step S1, receiving an instruction from the CAN bus;

and step S2, outputting a driving signal according to the instruction received from the CAN bus to drive the door handle motor to enable the door handle to be unfolded or retracted, diagnosing the working condition of the door handle motor in the unfolding or retracting process of the door handle, and sending fault information to the CAN bus to alarm and stop driving if abnormal working conditions occur.

7. The hidden vehicle door handle control method as claimed in claim 1, wherein the instructions received from the CAN bus in step S1 include: when any one of the doors is opened and the vehicle speed is less than a preset threshold value, a door handle unfolding instruction is sent by a vehicle body control module; or when all the vehicle doors are closed and the vehicle speed is greater than a preset threshold value, a vehicle door handle retracting command is sent by the vehicle body control module; or the wireless key receives an unlocking instruction or a locking instruction sent by the module.

8. The hidden vehicle door handle control method as claimed in claim 6, further comprising: stopping driving if the unfolding position signal or the retracting position signal of the vehicle door handle can be detected in at least one driving period; if the unfolding in-position signal or the retracting in-position signal of the vehicle door handle cannot be detected in at least one driving period, a fault code is recorded and sent to the CAN bus for alarming.

9. The hidden vehicle door handle control method as claimed in claim 6, further comprising: when the unfolding in-place signal of the vehicle door handle is not detected in at least one driving period, the driving signal is output to reversely drive the suction door motor, so that the suction door is released.

10. The hidden vehicle door handle control method as claimed in any one of claims 6 to 9, further comprising: the motor load current of the door handle is detected in the unfolding or retracting process of the door handle, when overcurrent short circuit or motor overheat protection occurs, the working condition of the fault is judged, the fault code is recorded and sent to the CAN bus to alarm, and the driving is stopped.

11. A hidden door handle control system comprising a hidden door handle control device, the hidden door handle control device further comprising:

the first driving unit is also used for diagnosing the working condition of the door handle motor in the process of unfolding or retracting the door handle, sending fault information to the microcontroller if abnormal working conditions occur, and sending the fault information to the CAN bus by the microcontroller to alarm and stop driving.

12. The hidden door handle control system of claim 11, further comprising a body control module for sending a deploy door handle command over the CAN bus when either door is open and vehicle speed is less than a predetermined threshold; or when all the doors are closed and the vehicle speed is greater than a preset threshold value, a retracting door handle command is sent through the CAN bus.

13. The hidden vehicle door handle control system of claim 11, further comprising a wireless key receiving module for transmitting an unlock command or a lock command over the CAN bus.

14. The hidden door handle control system as claimed in claim 11, further comprising a second driving unit for outputting a driving signal to reversely drive the door-engaging motor to release the door when the microcontroller does not detect the door handle deployment in-place signal for at least one driving cycle.

Technical Field

The invention belongs to the technical field of automobile electronic control, and particularly relates to a hidden type automobile door handle control device, system and control method.

Background

In the existing control of the hidden vehicle door handle, some schemes adopt a camera and an image processor to recognize gestures so as to open and close the door handle, but the scheme needs more than 4 cameras, an image processing module and an image algorithm, has higher cost, difficult development and complex structure, and cannot be interconnected and controlled with related modules on the vehicle through a CAN bus; some schemes adopt the controller to drive the hall motor, judge the door handle position through hall signal accuracy, but lack the motor no-load, overflow, short circuit and overheat protection, when door handle motor was frozen by ice and snow, the door handle motor can't continue to drive under the no hall signal condition simultaneously, leads to the car owner to open the door and get on the bus, and the reliability is relatively poor.

Disclosure of Invention

The technical problem to be solved by the embodiments of the present invention is to provide a low-cost, high-efficiency hidden door handle control device, system and control method with a diagnostic protection function.

In order to solve the above technical problems, the present invention provides a hidden door handle control device, including: the first driving unit is also used for diagnosing the working condition of the door handle motor in the process of unfolding or retracting the door handle, sending fault information to the microcontroller if abnormal working conditions occur, and sending the fault information to the CAN bus by the microcontroller to alarm and stop driving.

Further, the instructions received by the microcontroller from the CAN bus include: when any one of the doors is opened and the vehicle speed is less than a preset threshold value, a door handle unfolding instruction is sent by a vehicle body control module; or when all the vehicle doors are closed and the vehicle speed is greater than a preset threshold value, a vehicle door handle retracting command is sent by the vehicle body control module; or the wireless key receives an unlocking instruction or a locking instruction sent by the module.

Further, the microcontroller is used for stopping driving if the unfolding position signal or the retracting position signal of the vehicle door handle can be detected in at least one driving period; if the unfolding in-position signal or the retracting in-position signal of the vehicle door handle cannot be detected in at least one driving period, a fault code is recorded and sent to the CAN bus for alarming.

Furthermore, the hidden door handle control device further comprises a second driving unit, and the second driving unit is used for outputting a driving signal to reversely drive the suction door motor to release the suction door when the microcontroller does not detect the unfolding in-place signal of the door handle in at least one driving period.

Further, the first driving unit is specifically used for detecting the magnitude of the load current of the motor of the door handle during the unfolding or retracting process of the door handle, and when overcurrent short circuit or motor overheating protection occurs, fault information is sent to the microcontroller through the SPI bus.

The invention also provides a control method of the hidden vehicle door handle, which comprises the following steps:

step S1, receiving an instruction from the CAN bus;

and step S2, outputting a driving signal according to the instruction received from the CAN bus to drive the door handle motor to enable the door handle to be unfolded or retracted, diagnosing the working condition of the door handle motor in the unfolding or retracting process of the door handle, and sending fault information to the CAN bus to alarm and stop driving if abnormal working conditions occur.

Further, the instruction received by the step S1 from the CAN bus includes: when any one of the doors is opened and the vehicle speed is less than a preset threshold value, a door handle unfolding instruction is sent by a vehicle body control module; or when all the vehicle doors are closed and the vehicle speed is greater than a preset threshold value, a vehicle door handle retracting command is sent by the vehicle body control module; or the wireless key receives an unlocking instruction or a locking instruction sent by the module.

Further, the hidden door handle control method further comprises: stopping driving if the unfolding position signal or the retracting position signal of the vehicle door handle can be detected in at least one driving period; if the unfolding in-position signal or the retracting in-position signal of the vehicle door handle cannot be detected in at least one driving period, a fault code is recorded and sent to the CAN bus for alarming.

Further, the hidden door handle control method further comprises: when the unfolding in-place signal of the vehicle door handle is not detected in at least one driving period, the driving signal is output to reversely drive the suction door motor, so that the suction door is released.

Further, the hidden door handle control method further comprises: the motor load current of the door handle is detected in the unfolding or retracting process of the door handle, when overcurrent short circuit or motor overheat protection occurs, the working condition of the fault is judged, the fault code is recorded and sent to the CAN bus to alarm, and the driving is stopped.

The invention also provides a hidden vehicle door handle control system, which comprises a hidden vehicle door handle control device, wherein the hidden vehicle door handle control device further comprises:

the first driving unit is also used for diagnosing the working condition of the door handle motor in the process of unfolding or retracting the door handle, sending fault information to the microcontroller if abnormal working conditions occur, and sending the fault information to the CAN bus by the microcontroller to alarm and stop driving.

Further, the hidden door handle control system also comprises a vehicle body control module, which is used for sending a door handle unfolding instruction through a CAN bus when any one of the doors is opened and the vehicle speed is less than a preset threshold value; or when all the doors are closed and the vehicle speed is greater than a preset threshold value, a retracting door handle command is sent through the CAN bus.

Furthermore, the hidden door handle control system further comprises a wireless key receiving module, which is used for sending an unlocking instruction or a locking instruction through the CAN bus.

Furthermore, the hidden door handle control system further comprises a second driving unit, which is used for outputting a driving signal to reversely drive the suction door motor to release the suction door when the microcontroller does not detect the unfolding in-place signal of the door handle in at least one driving period.

The implementation of the invention has the following beneficial effects: the hidden vehicle door handle control device has a simple structure, and performs interactive control through the existing CAN information on the vehicle, so that the cost is greatly saved; the device has an overcurrent, short-circuit and overheat diagnosis function, and when the overcurrent, short-circuit and overheat faults occur to the load, the output is automatically cut off to protect the motor, so that the fault location and the load updating and maintenance are facilitated, the diagnosis and maintenance efficiency is improved, and the operation reliability and stability are also improved;

when the door handle is frozen by ice and snow, the door handle CAN still be unfolded in place through repeated attempts, the warning prompt is carried out through CAN reporting, and meanwhile, the driving signal is output to release the suction door motor, so that the door CAN be exposed out of a sufficient gap, a driver CAN conveniently open the door to get on the vehicle, the ice breaking capacity of the door handle is greatly improved, and the freezing fault of the ice and snow in winter is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic view of a driving structure of a hidden door handle control device according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of an implementation structure of a hidden door handle control device according to an embodiment of the present invention.

Fig. 3 is a flowchart illustrating a hidden door handle control method according to a second embodiment of the present invention.

Fig. 4 is a flowchart illustrating a hidden door handle control method for controlling the unfolding of a door handle according to a second embodiment of the present invention.

Fig. 5 is a schematic flow chart of a hidden door handle control device for controlling the retraction of a door handle according to a second embodiment of the present invention.

Detailed Description

The following description of the embodiments refers to the accompanying drawings, which are included to illustrate specific embodiments in which the invention may be practiced.

Referring to fig. 1, a hidden door handle control device according to an embodiment of the present invention includes: the first driving unit is also used for diagnosing the working condition of the door handle motor in the process of unfolding or retracting the door handle, sending fault information to the microcontroller if abnormal working conditions occur, and sending the fault information to the CAN bus by the microcontroller to alarm and stop driving.

Specifically, please refer to fig. 2, the command received by the microcontroller MCU from the CAN bus is from the wireless key receiving module or the vehicle body control module: (1) when any one of the doors is opened and the vehicle speed is less than a preset threshold value (for example, 15km/h), the vehicle body control module or the wireless key receiving module sends a door handle unfolding instruction to the microcontroller MCU of the hidden door handle control device through the CAN bus; or (2) the wireless key receiving module sends an unlocking command. The microcontroller MCU acquires the instruction from the CAN bus, controls the first driving unit to output a driving signal, and drives the door handle motor to rotate forward to unfold the door handle. In the process of unfolding the vehicle door handle, if the microcontroller MCU can detect an unfolding in-place signal of the vehicle door handle in a driving period, the microcontroller MCU indicates that the vehicle door handle is unfolded in place, and the microcontroller MCU stops driving; on the contrary, if the unfolding in-place signal of the vehicle door handle cannot be detected in the driving period, the vehicle door handle cannot be unfolded normally, the microcontroller MCU records a fault code and sends the fault code to the CAN bus to alarm. The first driving unit of the present embodiment adopts a full-bridge driving chip, which is, as an example, VNH7070 AS.

In the process of driving the vehicle door handle to be unfolded, the first driving unit CAN continuously detect the load current of the motor of the vehicle door handle, once overcurrent short circuit or motor overheating protection occurs, fault information is sent to the microcontroller MCU through the SPI bus, the microcontroller MCU judges the fault working condition, records fault codes and sends the fault codes to the CAN bus to give an alarm, and meanwhile, the driving is stopped at once to protect the system. When the door handle motor is overheated due to too many driving times under the high-temperature condition, the PTC protector inside the door handle motor cuts off the output, the door handle motor is powered off and cooled, the microcontroller MCU also stops outputting the driving signal at the moment, and the door handle motor is driven again after being recovered to the normal temperature.

As a further improvement, the hidden door handle control device of the embodiment further includes a second driving unit, configured to output a driving signal to drive the door-closing motor to release or close the door. As described above, in the process of unfolding the door handle, if the microcontroller MCU does not detect the unfolding in-place signal of the door handle in the driving cycle, the microcontroller MCU tries to unfold for the second time, and when the microcontroller MCU still cannot detect the unfolding in-place signal after the third time tries to unfold, the microcontroller MCU CAN record the fault code and send the fault code to the CAN bus for alarming, and further control the second driving unit to output a driving signal to reversely drive the door-closing motor, so that the door-closing motor is released, and an adequate gap CAN be exposed, thereby facilitating the driver to open the door and get on the vehicle, further solving the problem that the door handle is frozen and cannot get on the vehicle in winter, and improving the ice-breaking capability. It is understood that the second deployment and the third deployment are performed in corresponding driving cycles, for example, in the second driving cycle, the first driving unit outputs a driving signal to drive the door handle motor to rotate forward to attempt to deploy the door handle for the second time, and in the third driving cycle, the first driving unit outputs a driving signal to drive the door handle motor to rotate forward to attempt to deploy the door handle for the third time. The second driving unit of the present embodiment adopts a full-bridge driving chip, and as an example, it is VNH7070 AS. It should be noted that the aforementioned three attempts for expansion are only an example and are not limiting to the embodiment. In fact, the microcontroller MCU can also be set to directly control the second driving unit to output the driving signal to reversely drive the door-closing motor when the door handle is not detected to be opened in the driving period, so as to release the door and expose a sufficient gap for the driver to open the door and get on the vehicle.

When the door handle is unfolded specifically, after receiving a CAN command, the microcontroller MCU analyzes and outputs a +12V driving signal (positive driving) to control the full-bridge driving chip VNH7070ASVNH7070AS (a first driving unit) to drive the door handle motor to be unfolded outwards, and when the door handle is unfolded in place, the door handle motor feeds back a 0V unfolding in-place signal, so that the door handle is successfully unfolded in place. If the microcontroller MCU detects that the door handle cannot be normally unfolded in place for the third time, the second full-bridge driving chip VNH7070AS (a second driving unit) is controlled to output a-12V driving signal (reverse driving), so that the suction door releases a certain gap, a driver can conveniently get on the vehicle, and meanwhile, whether the in-place signal of the suction door is 12V or not is detected; when the pressure is 12V, the release of the suction door is successful, and when the pressure is 0V, the release is failed. Whether the suction door is released completely is judged by detecting the in-place signal of the suction door.

When all doors are closed and the vehicle speed is greater than a preset threshold value (for example, 15km/h), or the wireless remote control receiving module sends a locking command, the vehicle body control module or the wireless key receiving module sends a door handle retracting command to the microcontroller MCU of the hidden door handle control device through the CAN bus, the microcontroller MCU acquires the command from the CAN bus, controls the first driving unit to output a driving signal, drives the door handle motor to rotate reversely, and retracts the door handle. In the retraction process of the vehicle door handle, if the microcontroller MCU can detect a retraction in-place signal of the vehicle door handle in a driving period, the vehicle door handle is indicated to be retracted in place, and the microcontroller MCU stops driving; on the contrary, if the retraction in-place signal of the vehicle door handle cannot be detected in the driving period, the vehicle door handle cannot be retracted normally, and the microcontroller MCU records a fault code and sends the fault code to the CAN bus to alarm. Furthermore, a plurality of driving cycles can be set for driving and detecting, and if the microcontroller MCU can detect a retraction in-place signal in the driving cycle, the door handle is shown to be retracted in place, and the driving is stopped; if the retraction in-place signal can not be detected in the driving period, the microcontroller MCU tries to drive the door handle motor to reversely rotate for the second time to retract the door handle, and if the retraction in-place signal can be detected in the second driving period, the door handle retracts in place and stops driving; if the retraction in-place signal cannot be detected, the door handle is tried to be driven for the third time to reversely rotate the motor of the door handle, so that the door handle is retracted, if the retraction in-place signal CAN be detected in the third driving period, the door handle is retracted in place, if the retraction in-place signal cannot be detected, the door handle cannot be normally retracted in place for three times continuously, and the microcontroller MCU records a fault code and sends the fault code to the CAN bus to alarm.

Similarly, in the process of driving the vehicle door handle to retract, the first driving unit CAN continuously detect the load current of the motor of the vehicle door handle, once overcurrent short circuit or motor overheating protection occurs, fault information is sent to the microcontroller MCU through the SPI bus, the microcontroller MCU judges the fault working condition, records a fault code, sends the fault code to the CAN bus to alarm, and simultaneously stops driving to protect the system at once. When the door handle motor is overheated due to too many driving times under the high-temperature condition, the PTC protector inside the door handle motor cuts off the output, the door handle motor is powered off and cooled, the microcontroller MCU also stops outputting the driving signal at the moment, and the door handle motor is driven again after being recovered to the normal temperature.

When the door handle is retracted, after receiving a CAN command, the microcontroller MCU analyzes and outputs a drive signal (reverse drive) of-12V output by a full-bridge drive chip VNH7070AS (a first drive unit) to drive the door handle motor to retract inwards, and when the door handle is retracted to the position, the door handle motor feeds back a retraction in-position signal of 0V, so that the door handle is successfully retracted to the position.

As CAN be seen from the above, the microcontroller MCU of this embodiment is mainly responsible for CAN instruction parsing and control logic judgment and output, and detects the door handle in-place signal (in-place for deployment and in-place for retraction); the first full-bridge driving chip VNH7070AS is responsible for driving the door handle motor forward and backward, the door handle is unfolded when the door handle motor is driven forward, and the door handle is retracted when the door handle motor is driven backward; abnormal working condition diagnosis such as overcurrent, overvoltage, short circuit and the like in the motor driving process can be realized; the second full-bridge driving chip VNH7070AS is responsible for driving the attraction door motor in the forward direction and the reverse direction, the attraction door motor is driven in the forward direction to attract the attraction door and attract the attraction door, and the attraction door motor is driven in the reverse direction to attract the attraction door and release the attraction door. The vehicle door handle motor is controlled by adopting a high-cost-performance full-bridge driving chip, so that forward and reverse output control is realized, and the vehicle door handle motor is safe and reliable; the device has controllable cost, can drive the vehicle door handle motor and the suction door motor, and has high driving efficiency and good stability.

Referring to fig. 3, a hidden door handle control device according to a first embodiment of the present invention is a hidden door handle control method, including:

step S1, receiving an instruction from the CAN bus;

and step S2, outputting a driving signal according to the instruction received from the CAN bus to drive the door handle motor to enable the door handle to be unfolded or retracted, diagnosing the working condition of the door handle motor in the unfolding or retracting process of the door handle, and sending fault information to the CAN bus to alarm and stop driving if abnormal working conditions occur.

Referring to fig. 4, the command received from the CAN bus in step S1 includes: when any one of the doors is opened and the vehicle speed is less than a preset threshold value, a door handle unfolding instruction is sent by a vehicle body control module; or the wireless key receives the unlocking instruction sent by the module. Step S2 outputs a drive signal according to the received command, and drives the door handle motor to rotate forward to deploy the door handle. In the process of unfolding the vehicle door handle, if the unfolding in-place signal of the vehicle door handle can be detected in a driving period, the vehicle door handle is unfolded in place, and the driving is stopped; on the contrary, if the unfolding in-place signal of the vehicle door handle cannot be detected in the driving period, the vehicle door handle cannot be unfolded normally, the fault code is recorded and sent to the CAN bus to alarm. Further, in the process of unfolding the vehicle door handle, if the unfolding in-place signal of the vehicle door handle is not detected in a driving period, the vehicle door handle is tried to be unfolded for the second time, when the unfolding in-place signal cannot be detected in the third time, a fault code is recorded and sent to a CAN bus to give an alarm, and a driving signal is output to reversely drive a suction door motor, so that the suction door is released, a sufficient gap CAN be exposed, a driver CAN conveniently open the door and get on the vehicle, the problem that the vehicle door handle is frozen and cannot get on the vehicle in winter is solved, and the ice breaking capacity is improved.

Referring again to fig. 5, the command received from the CAN bus in step S1 includes: when all doors are closed and the vehicle speed is greater than a preset threshold value, a door handle retracting command is sent by a vehicle body control module; or the wireless key receives the locking instruction sent by the module. Step S2 outputs a drive signal according to the received command, and drives the door handle motor to rotate in reverse to retract the door handle. In the retracting process of the vehicle door handle, if the retracting in-place signal of the vehicle door handle can be detected in the driving period, the vehicle door handle is indicated to retract in place, and the driving is stopped; on the contrary, if the retraction in-place signal of the vehicle door handle cannot be detected in the driving period, the vehicle door handle cannot be retracted normally, a fault code is recorded and sent to the CAN bus to alarm. Furthermore, a plurality of driving cycles can be set for driving and detecting, if a retraction in-place signal can be detected in the driving cycle, the door handle is shown to be retracted in place, and the driving is stopped; if the retraction in-place signal can not be detected in the driving period, the door handle is tried to be driven for the second time to rotate reversely by the motor, so that the door handle is retracted, and if the retraction in-place signal can be detected in the second driving period, the door handle is retracted in place, and the driving is stopped; if the retraction in-place signal cannot be detected, the door handle is tried to be driven for the third time to reversely rotate the motor of the door handle, so that the door handle is retracted, if the retraction in-place signal CAN be detected in the third driving period, the door handle is retracted in place, if the retraction in-place signal cannot be detected, the door handle cannot be normally retracted in place for three times continuously, a fault code is recorded, and the fault code is sent to the CAN bus to give an alarm.

Corresponding to the hidden door handle control device provided in the first embodiment of the present invention, a third embodiment of the present invention provides a hidden door handle control system, including the hidden door handle control device according to the first embodiment of the present invention.

Further, the hidden door handle control system also comprises a vehicle body control module, which is used for sending a door handle unfolding instruction through a CAN bus when any one of the doors is opened and the vehicle speed is less than a preset threshold value; or when all the vehicle doors are closed and the vehicle speed is greater than a preset threshold value, sending a vehicle door handle retracting command through the CAN bus;

furthermore, the hidden door handle control system further comprises a wireless key receiving module, which is used for sending an unlocking instruction or a locking instruction through the CAN bus.

Furthermore, the hidden door handle control system further comprises a second driving unit, which is used for outputting a driving signal to reversely drive the suction door motor to release the suction door when the microcontroller does not detect the unfolding in-place signal of the door handle in at least one driving period.

As can be seen from the above description, compared with the prior art, the beneficial effects of the present invention are: the hidden vehicle door handle control device has a simple structure, and performs interactive control through the existing CAN information on the vehicle, so that the cost is greatly saved; the device has an overcurrent, short-circuit and overheat diagnosis function, and when the overcurrent, short-circuit and overheat faults occur to the load, the output is automatically cut off to protect the motor, so that the fault location and the load updating and maintenance are facilitated, the diagnosis and maintenance efficiency is improved, and the operation reliability and stability are also improved;

when the door handle is frozen by ice and snow, the door handle CAN still be unfolded in place through repeated attempts, the warning prompt is carried out through CAN reporting, and meanwhile, the driving signal is output to release the suction door motor, so that the door CAN be exposed out of a sufficient gap, a driver CAN conveniently open the door to get on the vehicle, the ice breaking capacity of the door handle is greatly improved, and the freezing fault of the ice and snow in winter is reduced.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.