Tow hook control method and system and vehicle

Abstract

The invention is suitable for the technical field of vehicles, and provides a tow hook control method and system and a vehicle. The tow hook control method comprises the steps that after a tow hook control signal is received, an in-place detection signal is sent; when the in-place feedback signal and the in-place detection signal meet a first preset condition, outputting a motor control signal and a target position detection signal; the in-place feedback signal is a signal generated by the micro-processing unit according to the in-place detection signal; the motor control signal is used for indicating the driving motor assembly to drive the tow hook to rotate after unlocking; when the first rotation information meets a second preset condition, a stop control signal is sent; the stop control signal is used for indicating the driving motor assembly to stop rotating; when the position feedback signal and the target position detection signal meet a third preset condition, it is determined that the tow hook reaches the target position; when the tow hook reaches the target position to be locked, the position feedback signal and the target position detection signal meet a third preset condition, and therefore automatic control over the tow hook is achieved.

Description

Technical Field

[0001] The present application belongs to the field of vehicle technology, and in particular, relates to a trailer hook control method, system and vehicle. Background Art

[0002] With the development of the vehicle industry, users have higher and higher requirements for vehicle performance, and at the same time, the requirements for intelligent control of trailer hooks are increasing. Currently, vehicle trailer hooks need to be opened or closed manually, which has the problems of cumbersome operation and high safety risks. Summary of the invention

[0003] The embodiments of the present application provide a trailer hook control method, system and vehicle, which can realize automatic opening or closing of the trailer hook.

[0004] In a first aspect, an embodiment of the present application provides a trailer hook control method, comprising:

[0005] After receiving the trailer hook control signal, sending an in-position detection signal;

[0006] When the in-position feedback signal and the in-position detection signal meet a first preset condition, a motor control signal and a target position detection signal are output; the in-position feedback signal is a signal generated by the microprocessor unit according to the in-position detection signal; the motor control signal is used to instruct the drive motor assembly to drive the trailer hook to rotate after unlocking;

[0007] When the first rotation information meets the second preset condition, a stop control signal is sent; the first rotation information is information about the rotation of the drive motor assembly; the stop control signal is used to instruct the drive motor assembly to stop rotating;

[0008] When the position feedback signal and the target position detection signal satisfy a third preset condition, it is determined that the trailer hook has reached the target position; the position feedback signal is a signal generated by the microprocessing unit based on the target position detection signal, and when the trailer hook reaches the target position and is locked, the position feedback signal and the target position detection signal satisfy the third preset condition.

[0009] In a possible implementation manner of the first aspect, the in-position detection signal and the in-position feedback signal are both pulse modulation signals, and the trailer hook control method further includes:

[0010] When the in-position detection signal and the in-position feedback signal coincide with each other, it is determined that the in-position detection signal and the in-position feedback signal satisfy the first preset condition.

[0011] In a possible implementation manner of the first aspect, the motor control signal includes a target rotation time, the first rotation information includes an actual rotation time of the drive motor assembly, and the trailer hook control method further includes:

[0012] When the actual rotation time reaches the target rotation time, determining that the first rotation information satisfies a second preset condition;

[0013] and / or,

[0014] The motor control signal includes a target rotation angle, the first rotation information includes an actual rotation angle of the drive motor assembly, and the trailer hook control method further includes:

[0015] When the actual rotation angle is equal to the target rotation angle, it is determined that the first rotation information satisfies a second preset condition.

[0016] In a possible implementation manner of the first aspect, the target position detection signal and the position feedback signal are both pulse modulation signals, and the trailer hook control method further includes:

[0017] When the target position detection signal and the position feedback signal coincide with each other, it is determined that the position feedback signal and the target position detection signal satisfy a third preset condition.

[0018] In a possible implementation manner of the first aspect, after determining that the trailer hook reaches the target position, the trailer hook control method further includes:

[0019] Acquire second rotation information; the second rotation information is information about the rotation of the drive motor assembly after sending the stop control signal;

[0020] A driving parameter is determined according to the second rotation information; the driving parameter is used to indicate a parameter for driving the driving motor assembly during the next trailer hook control.

[0021] In a possible implementation manner of the first aspect, the trailer hook control method further includes:

[0022] Periodically sending the target position detection signal and periodically acquiring the position feedback signal;

[0023] When the number of times that the position feedback signal and the target position detection signal do not satisfy the third preset condition reaches a preset number, an alarm message is sent.

[0024] In a second aspect, an embodiment of the present application provides a trailer hook control system, including a control unit, a drive motor assembly, a trailer hook locking mechanism assembly, a collection unit, and a microprocessor unit;

[0025] The control unit is used to send an in-position detection signal after receiving the trailer hook control signal;

[0026] The microprocessing unit is used to output an in-situ feedback signal according to the in-situ detection signal;

[0027] The control unit is further configured to output a motor control signal and a target position detection signal when the in-position feedback signal and the in-position detection signal meet a first preset condition;

[0028] The drive motor assembly is used to rotate according to the motor control signal, driving the trailer hook locking mechanism assembly to rotate, so that the unlocking plate in the trailer hook locking mechanism assembly moves a preset distance in a first direction, the trailer hook is unlocked, and the drive motor assembly drives the trailer hook to rotate;

[0029] The acquisition unit is used to acquire the rotation information of the drive motor assembly and output first rotation information;

[0030] The control unit is further configured to send a stop control signal when the first rotation information meets a second preset condition;

[0031] The drive motor assembly is further used to stop rotating according to the stop control signal, and the unlocking plate moves the preset distance in the second direction, and the trailer hook is locked; the first direction and the second direction are opposite;

[0032] The microprocessing unit is used to output a position feedback signal according to the target position detection signal;

[0033] The control unit is used to determine that the trailer hook reaches the target position when the position feedback signal and the target position detection signal meet a third preset condition; when the trailer hook is locked, the target position detection signal and the position feedback signal output by the microprocessor unit meet the third preset condition.

[0034] In a possible implementation of the second aspect, the microprocessor unit includes a contact collector and a first sensor, the first sensor is electrically connected to the contact collector and the control unit, respectively, the contact collector is arranged close to the trailer hook locking mechanism assembly, and when the unlocking disk moves a preset distance in a first direction, the unlocking disk squeezes the contact collector; when the unlocking disk squeezes the contact collector, the in-place feedback signal output by the first sensor and the in-place detection signal do not meet the first preset condition, or, the position feedback signal output by the first sensor and the target position detection signal do not meet the third preset condition; when the unlocking disk does not squeeze the contact collector, the in-place feedback signal output by the first sensor and the in-place detection signal meet the first preset condition, or, the position feedback signal output by the first sensor and the target position detection signal meet the third preset condition.

[0035] In a possible implementation of the second aspect, the contact collector includes a micro switch, and when the unlocking disk squeezes the contact collector, the micro switch is in a normally open state, and when the unlocking disk does not squeeze the contact collector, the micro switch is in a normally closed state.

[0036] In a third aspect, an embodiment of the present application provides a vehicle comprising a trailer hook control system as described in any two of the second aspect.

[0037] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0038] After receiving the trailer hook control signal, an in-position detection signal is sent. The microprocessor generates an in-position feedback signal according to the in-position detection signal. When the in-position feedback signal and the in-position detection signal meet the first preset condition, it means that the trailer hook is in the specified position, and the motor control signal and the target position detection signal are output at this time. The drive motor assembly drives the trailer hook to unlock and rotate according to the motor control signal. In the process of the drive motor assembly driving the trailer hook to rotate, the first rotation information of the drive motor assembly is obtained. When the first rotation information meets the second preset condition, it means that the drive motor assembly has rotated in place and the trailer hook has reached the target position, and a stop control instruction is sent at this time. The drive motor assembly stops rotating according to the stop control instruction. At this time, the unlocking disk will move a preset distance in the second direction opposite to the first direction to lock the trailer hook. The microprocessor will output the position feedback signal and the target position detection signal according to the target position detection signal to meet the third preset condition. When it is identified that the position feedback signal and the target position detection signal meet the third preset condition, it is determined that the trailer hook has reached the target position and is locked. Therefore, through the trailer hook control method of the present application, automatic control of the trailer hook can be achieved without the need for manual operation by the user, thereby reducing the operating difficulty of the trailer hook and improving the safety of user use.

[0039] It can be understood that the beneficial effects of the second to third aspects mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0041] Figure 1 is a schematic diagram of a trailer hook control system provided by an embodiment of the present application;

[0042] Figure 2 is a schematic diagram of a trailer hook control system provided by an embodiment of the present application;

[0043] Figure 3 It is a schematic diagram of the assembly of a trailer hook control system provided by an embodiment of the present application;

[0044] Figure 4 It is a flow chart of a trailer hook control method provided in one embodiment of the present application.

[0045] In the figure: 100, control unit; 200, drive motor assembly; 300, trailer hook locking mechanism assembly; 301, unlocking disk; 302, rotating shaft; 400, collection unit; 500, microprocessor unit; 501, first sensor; 502, contact collector; 600, wiring harness interface; 700, trailer hook. DETAILED DESCRIPTION

[0046] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0047] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0048] It should also be understood that the term “and / or” used in the specification and appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0049] As used in the specification and appended claims of this application, the term "if" can be interpreted as "when" or "uponce" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "uponce it is determined" or "in response to determining" or "uponce [described condition or event] is detected" or "in response to detecting [described condition or event]", depending on the context.

[0050] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0051] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0052] The present application embodiment provides a trailer hook control system, see Figures 1 to 3 As shown, the trailer hook control system includes a control unit 100 , a drive motor assembly 200 , a trailer hook locking mechanism assembly 300 , a collection unit 400 and a microprocessor unit 500 .

[0053] Specifically, the trailer hook 700 on the vehicle has two states, namely, the extended position and the retracted position. When the trailer hook 700 needs to be used, the trailer hook 700 needs to be controlled to be in the extended position; when the trailer hook 700 is not needed, the trailer hook 700 needs to be controlled to be in the retracted position. When the user needs to control the trailer hook 700, the user can send a trailer hook control signal through the smart key, the vehicle display or the voice system on the vehicle. The control unit 100 is used to send an in-position detection signal to the microprocessor unit 500 after receiving the trailer hook control signal.

[0054] The microprocessing unit 500 is used to output an in-position feedback signal according to the in-position detection signal. The position of the unlocking disk 301 in the trailer hook locking mechanism assembly 300 is different, and the in-position feedback signal output by the microprocessing unit 500 is different. When the unlocking disk 301 is in contact with the microprocessing unit 500, the in-position feedback signal and the in-position detection signal output by the microprocessing unit 500 do not meet the first preset condition; when the unlocking disk 301 is not in contact with the microprocessing unit 500, the in-position feedback signal and the in-position detection signal output by the microprocessing unit 500 meet the first preset condition.

[0055] After receiving the in-position feedback signal output by the microprocessing unit 500, the control unit 100 compares the in-position feedback signal with the in-position detection signal to determine whether the in-position feedback signal and the in-position detection signal meet the first preset condition. If the in-position feedback signal and the in-position detection signal meet the first preset condition, it means that the unlocking plate 301 is not in contact with the microprocessing unit 500, and the trailer hook 700 is located at the specified position. At this time, the control unit 100 outputs the motor control signal and the target position detection signal.

[0056] The driving motor assembly 200 is used to rotate according to the motor control signal, driving the trailer hook locking mechanism assembly 300 to rotate, so that the unlocking plate 301 in the trailer hook locking mechanism assembly 300 moves in the first direction, and the trailer plate begins to unlock. When the unlocking plate 301 moves a preset distance in the first direction, the trailer hook 700 is unlocked, and the driving motor assembly 200 can drive the trailer hook 700 to rotate through the rotating shaft 302.

[0057] During the rotation of the drive motor assembly 200 , the acquisition unit 400 is used to acquire the rotation information of the drive motor assembly 200 and output the first rotation information.

[0058] The control unit 100 receives the first rotation information. When the first rotation information meets the second preset condition, it indicates that the trailer hook 700 has reached the target position. At this time, the control unit 100 sends a stop control signal.

[0059] The driving motor assembly 200 stops rotating after receiving the stop control signal, and the unlocking plate 301 moves a preset distance in a second direction opposite to the first direction, so that the trailer hook 700 is locked.

[0060] During the rotation of the drive motor assembly 200, the microprocessor unit 500 will respond to the target position detection signal and output a position feedback signal according to the target position detection signal. When the trailer hook 700 is in the unlocked state, that is, when the unlocking disk 301 moves a preset distance in the first direction, the unlocking disk 301 contacts the microprocessor unit 500, and at this time, the position feedback signal output by the microprocessor unit 500 and the target position detection signal do not meet the third preset condition. When the unlocking disk 301 moves a preset distance in the second direction, the unlocking disk 301 releases the microprocessor unit 500, that is, the unlocking disk 301 and the microprocessor unit 500 are no longer in contact, and at this time, the position feedback signal output by the microprocessor unit 500 and the target position detection signal meet the third preset condition.

[0061] When the control unit 100 recognizes that the position feedback signal and the target position detection signal satisfy the third preset condition, it is determined that the trailer hook 700 reaches the target position and the trailer hook 700 is locked.

[0062] Therefore, the trailer hook control system realizes automatic control of the trailer hook 700 through the above-mentioned working process, does not require manual operation by the user, reduces the operating difficulty of the trailer hook 700, and improves the safety of user use.

[0063] In some embodiments, after the control unit 100 sends a stop control signal to the drive motor assembly 200, the drive motor assembly 200 is no longer driven by voltage, but due to inertia, the drive motor assembly 200 will still rotate. At this time, the control unit 100 obtains the second rotation information through the acquisition unit 400 (the second rotation information is the information of the rotation of the drive motor assembly 200 after the control unit 100 sends the stop control signal), and determines the driving parameters according to the second rotation information, and the driving parameters are used to indicate the parameters for driving the drive motor assembly 200 when the trailer hook 700 is controlled next time. That is, when the trailer hook 700 is controlled next time, the control unit 100 drives the drive motor assembly 200 according to the determined parameters, thereby compensating for the error caused by the inertial rotation of the drive motor assembly 200 when the trailer hook 700 was controlled last time, thereby improving the control accuracy of the trailer hook 700.

[0064] In some embodiments, Figure 2 As shown, the microprocessor unit 500 includes a contact collector 502 and a first sensor 501 . The first sensor 501 is electrically connected to the contact collector 502 and the control unit 100 , respectively. The contact collector 502 is disposed close to the trailer hook locking mechanism assembly 300 .

[0065] Specifically, when the unlocking disk 301 moves a preset distance in the first direction, the trailer hook 700 is unlocked, and the unlocking disk 301 presses the contact collector 502. At this time, the driving motor assembly 200 can drive the trailer hook 700 to rotate. When the unlocking disk 301 moves a preset distance in the second direction opposite to the first direction, the trailer hook 700 is locked, the trailer hook 700 is fixed at the current position, the unlocking disk 301 leaves the contact collector 502, and the unlocking disk 301 no longer presses the contact collector 502. When the unlocking disk 301 presses the contact collector 502, the in-position feedback signal and the in-position detection signal output by the first sensor 501 do not meet the first preset condition, or the position feedback signal and the target position detection signal output by the first sensor 501 do not meet the third preset condition. When the unlocking disk 301 does not press the contact collector 502, the in-position feedback signal and the in-position detection signal output by the first sensor 501 meet the first preset condition, or the position feedback signal and the target position detection signal output by the first sensor 501 meet the third preset condition. Thus, after the control unit 100 outputs the in-position detection signal or the target position detection signal to the microprocessor unit 500, it receives the in-position feedback signal or the position feedback signal output by the first sensor 501, and by comparing the in-position detection signal with the in-position feedback signal, or by comparing the target position detection signal with the position feedback signal, it is possible to determine the current state (unlocked state or locked state) of the trailer hook 700. Before controlling the trailer hook 700, if it is determined that the in-position detection signal and the in-position feedback signal meet the first preset condition, it is determined that the current trailer hook 700 is located at the specified position, and at this time, the drive motor assembly 200 can be controlled to rotate. During the process of the drive motor assembly 200 driving the trailer hook 700 to rotate, if it is determined that the target position detection signal and the position feedback signal meet the third preset condition, it is determined that the current trailer hook 700 has rotated to the target position, and at this time, the control unit 100 controls the drive motor assembly 200 to stop rotating.

[0066] In some embodiments, the contact collector 502 includes a micro switch. When the unlocking disk 301 presses the contact collector 502, the micro switch is in a normally open state. When the unlocking disk 301 does not press the contact collector 502, the micro switch is in a normally closed state.

[0067] Specifically, the micro switch is provided with a normally open terminal (NO), a common terminal (COM) and a normally closed terminal (NC). The normally open terminal (NO), the common terminal (COM) and the normally closed terminal (NC) of the micro switch are connected one by one with the three pins of the first sensor 501 to prevent the micro switch from being damaged due to overcurrent caused by wrong connection or reverse connection.

[0068] When the unlocking disk 301 does not squeeze the contact piece of the microswitch, the microswitch is in a normally closed state. At this time, the microswitch is in a stable state. The first sensor 501 outputs an in-place feedback signal according to the in-place detection signal sent by the control unit 100. At this time, the in-place feedback signal and the in-place detection signal meet the first preset condition; or, the first sensor 501 outputs a position feedback signal according to the target position detection signal sent by the control unit 100. At this time, the position feedback signal and the target position detection signal meet the third preset condition.

[0069] When the unlocking disk 301 moves a preset distance from the initial position to the first direction, the unlocking disk 301 will squeeze the contact piece of the microswitch, and the microswitch is in a fluctuating state. The first sensor 501 outputs an in-place feedback signal according to the in-place detection signal sent by the control unit 100. At this time, the in-place feedback signal and the in-place detection signal do not meet the first preset condition; or, the first sensor 501 outputs a position feedback signal according to the target position detection signal sent by the control unit 100. At this time, the position feedback signal and the target position detection signal do not meet the third preset condition.

[0070] Therefore, the control unit 100 sends a detection signal (an in-position detection signal or a target position detection signal) to the first sensor 501, and receives a signal (an in-position feedback signal or a position feedback signal) fed back by the first sensor 501, and then compares the sent signal with the received signal to determine the current position of the unlocking disk 301. Since the position of the unlocking disk 301 corresponds to the position of the trailer hook 700, the control unit 100 can determine the position of the trailer hook 700 by comparing the sent signal with the received signal.

[0071] In some embodiments, the speed change mechanism of the drive motor assembly 200 uses a worm gear and a single gear set instead of a general planetary gear set. It has a simple structure and is integrated inside the drive motor, with high integration, smaller size and lower cost.

[0072] In some embodiments, the acquisition unit 400 includes a Hall sensor, and a potentiometer (variable resistor) is formed by a multi-level permanent magnet and a brush on the rotor installed on the motor shaft of the drive motor assembly 200. When the potentiometer detects the rotation position of the drive motor assembly 200, the Hall sensor outputs a regular position pulse width signal (first rotation information) and sends it to the control unit 100. The control unit 100 can determine the rotation information (rotation time, rotation angle, etc.) of the drive motor assembly 200 through the first rotation information output by the Hall sensor, and realize the monitoring of the rotation of the drive motor assembly 200.

[0073] In some embodiments, the wiring harnesses of the acquisition unit 400 (Hall sensor) and the microprocessor unit 500 (first sensor 501) are connected to the control unit 100 via the wiring harness interface 600, so that the wiring harness arrangement is more reasonable.

[0074] In order to clearly explain the working principle of the trailer hook control system, the following Figure 3 The working process of the trailer hook control system is explained.

[0075] like Figure 3 As shown, the trailer hook 700 of the vehicle has two states, namely, the unfolded position ( Figure 3 A position in the Figure 3 B in the ).

[0076] The first scenario: when the trailer hook 700 needs to be used, the trailer hook 700 needs to be controlled to move from the retracted position to the extended position.

[0077] After receiving the trailer hook deployment control instruction, the control unit 100 sends the instruction to the microprocessor unit 500 ( Figure 3 The first sensor 501) sends a presence detection signal.

[0078] The microprocessing unit 500 outputs an in-position feedback signal according to the in-position detection signal. The position of the unlocking disk 301 in the trailer hook locking mechanism assembly 300 is different, and the in-position feedback signal output by the microprocessing unit 500 is different. When the unlocking disk 301 is in contact with the microprocessing unit 500, the in-position feedback signal and the in-position detection signal output by the microprocessing unit 500 do not meet the first preset condition. When the unlocking disk 301 is not in contact with the microprocessing unit 500, the in-position feedback signal and the in-position detection signal output by the microprocessing unit 500 meet the first preset condition.

[0079] After receiving the in-position feedback signal output by the microprocessor unit 500, the control unit 100 compares the in-position feedback signal with the in-position detection signal to determine whether the in-position feedback signal and the in-position detection signal meet the first preset condition. If the in-position feedback signal and the in-position detection signal meet the first preset condition, it means that the unlocking plate 301 is not in contact with the microprocessor unit 500, and the trailer hook 700 is in the retracted position ( Figure 3 B position in the figure), at this time the control unit 100 outputs a motor control signal and a target position detection signal.

[0080] The driving motor assembly 200 is used to rotate according to the motor control signal, driving the trailer hook locking mechanism assembly 300 to rotate, so that the unlocking plate 301 in the trailer hook locking mechanism assembly 300 moves in the first direction, and the trailer plate begins to unlock. When the unlocking plate 301 moves a preset distance in the first direction, the trailer hook 700 is unlocked, and the driving motor assembly 200 drives the trailer hook 700 to rotate.

[0081] During the rotation of the drive motor assembly 200 , the acquisition unit 400 is used to acquire the rotation information of the drive motor assembly 200 and output the first rotation information.

[0082] The control unit 100 receives the first rotation information. When the first rotation information meets the second preset condition, it indicates that the trailer hook 700 has reached the target position. At this time, the control unit 100 sends a stop control signal.

[0083] The driving motor assembly 200 stops rotating after receiving the stop control signal, and the unlocking plate 301 moves a preset distance in a second direction opposite to the first direction, so that the trailer hook 700 is locked.

[0084] During the rotation of the drive motor assembly 200, the microprocessor unit 500 will respond to the target position detection signal and output a position feedback signal according to the target position detection signal. When the trailer hook 700 is in the unlocked state, that is, when the unlocking disk 301 moves a preset distance in the first direction, the unlocking disk 301 contacts the microprocessor unit 500, and at this time, the position feedback signal output by the microprocessor unit 500 and the target position detection signal do not meet the third preset condition. When the unlocking disk 301 moves a preset distance in the second direction, the unlocking disk 301 releases the microprocessor unit 500, that is, the unlocking disk 301 and the microprocessor unit 500 are no longer in contact, and at this time, the position feedback signal output by the microprocessor unit 500 and the target position detection signal meet the third preset condition.

[0085] When the control unit 100 identifies that the position feedback signal and the target position detection signal meet the third preset condition, it is determined that the trailer hook 700 has reached the target position ( Figure 3 The trailer hook 700 is locked.

[0086] Therefore, the trailer hook control system realizes the automatic deployment of the trailer hook 700 through the above-mentioned working process, without the need for manual operation by the user, thereby reducing the operating difficulty of the trailer hook 700 and improving the safety of user use.

[0087] After the control unit 100 sends a stop control signal to the drive motor assembly 200, the drive motor assembly 200 is no longer driven by voltage, but due to inertia, the drive motor assembly 200 will still rotate. At this time, the control unit 100 obtains the second rotation information through the acquisition unit 400 (the second rotation information is the information of the drive motor assembly 200 rotating after the control unit 100 sends the stop control signal), and determines the driving parameters according to the second rotation information. The driving parameters are used to indicate the parameters for driving the drive motor assembly 200 when the trailer hook 700 is controlled next time (controlling the contraction of the trailer hook 700). That is, when the trailer hook 700 is controlled next time, the control unit 100 drives the drive motor assembly 200 according to the determined parameters, thereby compensating for the error caused by the inertial rotation of the drive motor assembly 200 when the trailer hook 700 was controlled last time, thereby improving the control accuracy of the trailer hook 700.

[0088] The second scenario: when the trailer hook 700 is used, it is necessary to control the trailer hook 700 to move from the extended position to the retracted position.

[0089] After receiving the trailer hook retraction control instruction, the control unit 100 sends the instruction to the microprocessor unit 500 ( Figure 3 The first sensor 501) sends a presence detection signal.

[0090] The microprocessing unit 500 outputs an in-position feedback signal according to the in-position detection signal. The position of the unlocking disk 301 in the trailer hook locking mechanism assembly 300 is different, and the in-position feedback signal output by the microprocessing unit 500 is different. When the unlocking disk 301 is in contact with the microprocessing unit 500, the in-position feedback signal and the in-position detection signal output by the microprocessing unit 500 do not meet the first preset condition. When the unlocking disk 301 is not in contact with the microprocessing unit 500, the in-position feedback signal and the in-position detection signal output by the microprocessing unit 500 meet the first preset condition.

[0091] After receiving the in-position feedback signal output by the microprocessor unit 500, the control unit 100 compares the in-position feedback signal with the in-position detection signal to determine whether the in-position feedback signal and the in-position detection signal meet the first preset condition. If the in-position feedback signal and the in-position detection signal meet the first preset condition, it means that the unlocking plate 301 is not in contact with the microprocessor unit 500, and the trailer hook 700 is in the deployed position ( Figure 3 A position in the figure), at this time the control unit 100 outputs a motor control signal and a target position detection signal.

[0092] The driving motor assembly 200 is used to rotate according to the motor control signal, driving the trailer hook locking mechanism assembly 300 to rotate, so that the unlocking plate 301 in the trailer hook locking mechanism assembly 300 moves in the first direction, and the trailer plate begins to unlock. When the unlocking plate 301 moves a preset distance in the first direction, the trailer hook 700 is unlocked, and the driving motor assembly 200 drives the trailer hook 700 to rotate.

[0093] During the rotation of the drive motor assembly 200 , the acquisition unit 400 is used to acquire the rotation information of the drive motor assembly 200 and output the first rotation information.

[0094] The control unit 100 receives the first rotation information. When the first rotation information meets the second preset condition, it indicates that the trailer hook 700 has reached the target position. At this time, the control unit 100 sends a stop control signal.

[0095] The driving motor assembly 200 stops rotating after receiving the stop control signal, and the unlocking plate 301 moves a preset distance in a second direction opposite to the first direction, so that the trailer hook 700 is locked.

[0096] During the rotation of the drive motor assembly 200, the microprocessor unit 500 will respond to the target position detection signal and output a position feedback signal according to the target position detection signal. When the trailer hook 700 is in the unlocked state, that is, when the unlocking disk 301 moves a preset distance in the first direction, the unlocking disk 301 contacts the microprocessor unit 500, and at this time, the position feedback signal output by the microprocessor unit 500 and the target position detection signal do not meet the third preset condition. When the unlocking disk 301 moves a preset distance in the second direction, the unlocking disk 301 releases the microprocessor unit 500, that is, the unlocking disk 301 and the microprocessor unit 500 are no longer in contact, and at this time, the position feedback signal output by the microprocessor unit 500 and the target position detection signal meet the third preset condition.

[0097] When the control unit 100 identifies that the position feedback signal and the target position detection signal meet the third preset condition, it is determined that the trailer hook 700 has reached the target position ( Figure 3 and the trailer hook 700 is locked.

[0098] Therefore, the trailer hook control system realizes the automatic retraction of the trailer hook 700 through the above-mentioned working process, without the need for manual operation by the user, thereby reducing the operating difficulty of the trailer hook 700 and improving the safety of user use.

[0099] After the control unit 100 sends a stop control signal to the drive motor assembly 200, the drive motor assembly 200 is no longer driven by voltage, but due to inertia, the drive motor assembly 200 will still rotate. At this time, the control unit 100 obtains the second rotation information through the acquisition unit 400 (the second rotation information is the information of the drive motor assembly 200 rotating after the control unit 100 sends the stop control signal), and determines the driving parameters according to the second rotation information. The driving parameters are used to indicate the parameters for driving the drive motor assembly 200 when the trailer hook 700 is controlled next time (controlling the trailer hook 700 to unfold). That is, when the trailer hook 700 is controlled next time, the control unit 100 drives the drive motor assembly 200 according to the determined parameters, thereby compensating for the error caused by the inertial rotation of the drive motor assembly 200 when the trailer hook 700 was controlled last time, thereby improving the control accuracy of the trailer hook 700.

[0100] The present application also provides a trailer hook control method, such as Figure 4 As shown, the trailer hook control method includes steps S401 to S404.

[0101] Step S401, after receiving the trailer hook control signal, sending a position detection signal.

[0102] Specifically, when the user needs to control the trailer hook, the user can send a trailer hook control signal through the smart key, the vehicle display screen or the voice system on the vehicle. After receiving the trailer hook control signal, a position detection signal is sent to the microprocessing unit.

[0103] Step S402, when the in-position feedback signal and the in-position detection signal meet the first preset condition, output the motor control signal and the target position detection signal; the in-position feedback signal is a signal generated by the microprocessor unit according to the in-position detection signal; the motor control signal is used to instruct the drive motor assembly to rotate, and the drive motor assembly drives the trailer hook locking mechanism assembly to drive the trailer hook to rotate after unlocking.

[0104] Specifically, the microprocessing unit is used to output an in-position feedback signal according to the in-position detection signal. The position of the unlocking disk in the trailer hook locking mechanism assembly is different, and the in-position feedback signal output by the microprocessing unit is different. When the unlocking disk is in contact with the microprocessing unit, the in-position feedback signal and the in-position detection signal output by the microprocessing unit do not meet the first preset condition; when the unlocking disk is not in contact with the microprocessing unit, the in-position feedback signal and the in-position detection signal output by the microprocessing unit meet the first preset condition.

[0105] After receiving the in-position feedback signal output by the microprocessor unit, the in-position feedback signal is compared with the in-position detection signal to determine whether the in-position feedback signal and the in-position detection signal meet the first preset condition. If the in-position feedback signal and the in-position detection signal meet the first preset condition, it means that the unlocking disk is not in contact with the microprocessor unit, and the trailer hook is in the specified position, and the motor control signal and the target position detection signal are output at this time.

[0106] Exemplarily, both the in-position detection signal and the in-position feedback signal are pulse modulation signals, and when the in-position detection signal and the in-position feedback signal coincide with each other, it is determined that the in-position detection signal and the in-position feedback signal satisfy the first preset condition.

[0107] Step S403, when the first rotation information meets the second preset condition, a stop control signal is sent; the first rotation information is information about the rotation of the drive motor assembly; the stop control signal is used to instruct the drive motor assembly to stop rotating.

[0108] Specifically, the drive motor assembly is used to rotate according to the motor control signal, drive the trailer hook locking mechanism assembly to rotate, and move the unlocking disk in the trailer hook locking mechanism assembly to a first direction, and the trailer disk begins to unlock. When the unlocking disk moves a preset distance in the first direction, the trailer hook is unlocked, and the drive motor assembly drives the trailer hook to rotate. During the rotation of the drive motor assembly, the acquisition unit is used to collect the rotation information of the drive motor assembly and output the first rotation information. When receiving the first rotation information, when the first rotation information meets the second preset condition, it means that the trailer hook has reached the target position, and a stop control signal is sent at this time. After receiving the stop control signal, the drive motor assembly stops rotating, and the unlocking disk will move a preset distance in a second direction opposite to the first direction to lock the trailer hook.

[0109] Exemplarily, the motor control signal includes a target rotation time, and the first rotation information includes an actual rotation time of the drive motor assembly. When the actual rotation time reaches the target rotation time, it is determined that the first rotation information meets the second preset condition.

[0110] and / or,

[0111] The motor control signal includes a target rotation angle, and the first rotation information includes an actual rotation angle of the drive motor assembly. When the actual rotation angle is equal to the target rotation angle, it is determined that the first rotation information meets the second preset condition.

[0112] Step S404, when the position feedback signal and the target position detection signal meet the third preset condition, it is determined that the trailer hook has reached the target position; the position feedback signal is a signal generated by the microprocessing unit according to the target position detection signal, and when the trailer hook reaches the target position and is locked, the position feedback signal and the target position detection signal meet the third preset condition.

[0113] Specifically, during the rotation of the drive motor assembly, the microprocessor unit will respond to the target position detection signal and output a position feedback signal according to the target position detection signal. When the trailer hook is in the unlocked state, that is, when the unlocking disk moves a preset distance in the first direction, the unlocking disk contacts the microprocessor unit, and at this time, the position feedback signal output by the microprocessor unit and the target position detection signal do not meet the third preset condition. When the unlocking disk moves a preset distance in the second direction, the unlocking disk releases the microprocessor unit, that is, the unlocking disk and the microprocessor unit are no longer in contact, and at this time, the position feedback signal output by the microprocessor unit and the target position detection signal meet the third preset condition.

[0114] When the position feedback signal and the target position detection signal satisfy the third preset condition, it is determined that the trailer hook reaches the target position and the trailer hook is locked.

[0115] Therefore, the trailer hook control system realizes automatic control of the trailer hook through the above-mentioned work flow, does not require manual operation by the user, reduces the difficulty of operating the trailer hook, and improves the safety of user use.

[0116] Exemplarily, both the target position detection signal and the position feedback signal are pulse modulation signals, and when the target position detection signal and the position feedback signal coincide with each other, it is determined that the position feedback signal and the target position detection signal satisfy a third preset condition.

[0117] In some embodiments, after determining that the trailer hook has reached the target position, the trailer hook control method also includes: obtaining second rotation information; the second rotation information is information about the rotation of the drive motor assembly after sending a stop control signal; determining driving parameters based on the second rotation information; the driving parameters are used to indicate the parameters for driving the drive motor assembly during the next trailer hook control.

[0118] Specifically, after a stop control signal is sent to the drive motor assembly, the drive motor assembly is no longer driven by voltage, but due to inertia, the drive motor assembly will still rotate. At this time, the acquisition unit obtains the second rotation information (the second rotation information is the information about the rotation of the drive motor assembly after the stop control signal is sent), and determines the drive parameters based on the second rotation information. The drive parameters are used to indicate the parameters for driving the drive motor assembly during the next trailer hook control. That is, the next time the trailer hook is controlled, the drive motor assembly is driven according to the determined parameters, thereby compensating for the error caused by the inertial rotation of the drive motor assembly during the last control of the trailer hook, thereby improving the control accuracy of the trailer hook.

[0119] In some embodiments, the trailer hook control method further includes: periodically sending a target position detection signal and periodically acquiring a position feedback signal; when the number of times that the position feedback signal and the target position detection signal do not satisfy a third preset condition reaches a preset number, sending an alarm message.

[0120] Specifically, when controlling the trailer hook, the trailer hook may be stuck and unable to move to the target position. At this time, the target position detection signal is periodically sent, and the position feedback signal is periodically obtained. When the number of times that the position feedback signal and the target position detection signal do not meet the third preset condition reaches the preset number, it means that the trailer hook cannot move to the target position. At this time, an alarm message is sent to inform the user that the trailer hook cannot move to the target position. It is used to perform timely processing after receiving the alarm message, so that the trailer hook returns to normal and moves smoothly to the target position, ensuring the normal use of the trailer.

[0121] Exemplarily, the alarm information can be sent by sending a voice alarm through the vehicle's audio equipment to remind the user, the alarm information can be displayed on the vehicle's display screen, and the alarm information can be sent through the vehicle's indicator light. In addition to this, the alarm can also be notified to the user in other ways, and the specific method of the alarm is not limited here.

[0122] The present application also provides a vehicle, including the trailer hook control system described above, which can realize automatic control of the trailer hook without the need for manual operation by the user, thereby reducing the difficulty of operating the trailer hook and improving the safety of user use.

[0123] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A trailer hook control method, characterized in that: include: After receiving the trailer hook control signal, sending an in-position detection signal; When the in-position feedback signal and the in-position detection signal meet a first preset condition, a motor control signal and a target position detection signal are output; the in-position feedback signal is a signal generated by the microprocessor unit according to the in-position detection signal; the motor control signal is used to instruct the drive motor assembly to drive the trailer hook to rotate after unlocking; When the first rotation information meets the second preset condition, a stop control signal is sent; the first rotation information is information about the rotation of the drive motor assembly; The stop control signal is used to instruct the drive motor assembly to stop rotating; When the position feedback signal and the target position detection signal satisfy a third preset condition, it is determined that the trailer hook has reached the target position; the position feedback signal is a signal generated by the microprocessing unit based on the target position detection signal, and when the trailer hook reaches the target position and is locked, the position feedback signal and the target position detection signal satisfy the third preset condition.

2. The trailer hook control method according to claim 1, characterized in that: The in-position detection signal and the in-position feedback signal are both pulse modulation signals, and the trailer hook control method further includes: When the in-position detection signal and the in-position feedback signal coincide with each other, it is determined that the in-position detection signal and the in-position feedback signal satisfy the first preset condition.

3. The trailer hook control method according to claim 1, characterized in that: The motor control signal includes a target rotation time, the first rotation information includes an actual rotation time of the drive motor assembly, and the trailer hook control method further includes: When the actual rotation time reaches the target rotation time, determining that the first rotation information satisfies a second preset condition; and / or, The motor control signal includes a target rotation angle, the first rotation information includes an actual rotation angle of the drive motor assembly, and the trailer hook control method further includes: When the actual rotation angle is equal to the target rotation angle, it is determined that the first rotation information satisfies a second preset condition.

4. The trailer hook control method according to claim 1, characterized in that: The target position detection signal and the position feedback signal are both pulse modulation signals, and the trailer hook control method further includes: When the target position detection signal and the position feedback signal coincide with each other, it is determined that the position feedback signal and the target position detection signal satisfy a third preset condition.

5. The trailer hook control method according to any one of claims 1 to 4, characterized in that: After determining that the trailer hook reaches the target position, the trailer hook control method further includes: Acquire second rotation information; the second rotation information is information about the rotation of the drive motor assembly after sending the stop control signal; A driving parameter is determined according to the second rotation information; the driving parameter is used to indicate a parameter for driving the driving motor assembly during the next trailer hook control.

6. The trailer hook control method according to any one of claims 1 to 4, characterized in that: The trailer hook control method further includes: Periodically sending the target position detection signal and periodically acquiring the position feedback signal; When the number of times that the position feedback signal and the target position detection signal do not satisfy the third preset condition reaches a preset number, an alarm message is sent.

7. A trailer hook control system, characterized in that: It includes a control unit, a drive motor assembly, a trailer hook locking mechanism assembly, a collection unit and a microprocessor unit; The control unit is used to send an in-position detection signal after receiving the trailer hook control signal; The microprocessing unit is used to output an in-situ feedback signal according to the in-situ detection signal; The control unit is further configured to output a motor control signal and a target position detection signal when the in-position feedback signal and the in-position detection signal meet a first preset condition; The drive motor assembly is used to rotate according to the motor control signal, driving the trailer hook locking mechanism assembly to rotate, so that the unlocking plate in the trailer hook locking mechanism assembly moves a preset distance in a first direction, the trailer hook is unlocked, and the drive motor assembly drives the trailer hook to rotate; The acquisition unit is used to acquire the rotation information of the drive motor assembly and output first rotation information; The control unit is further configured to send a stop control signal when the first rotation information meets a second preset condition; The drive motor assembly is further used to stop rotating according to the stop control signal, and the unlocking plate moves the preset distance in the second direction, and the trailer hook is locked; the first direction and the second direction are opposite; The microprocessing unit is used to output a position feedback signal according to the target position detection signal; The control unit is used to determine that the trailer hook reaches the target position when the position feedback signal and the target position detection signal meet a third preset condition; when the trailer hook is locked, the target position detection signal and the position feedback signal output by the microprocessor unit meet the third preset condition.

8. The trailer hook control system according to claim 7, characterized in that: The microprocessing unit includes a contact collector and a first sensor, the first sensor is electrically connected to the contact collector and the control unit respectively, the contact collector is arranged close to the trailer hook locking mechanism assembly, and when the unlocking disk moves a preset distance in a first direction, the unlocking disk squeezes the contact collector; When the unlocking disk squeezes the contact collector, the in-place feedback signal and the in-place detection signal output by the first sensor do not satisfy the first preset condition, or the position feedback signal and the target position detection signal output by the first sensor do not satisfy the third preset condition; when the unlocking disk does not squeeze the contact collector, the in-place feedback signal and the in-place detection signal output by the first sensor satisfy the first preset condition, or the position feedback signal and the target position detection signal output by the first sensor satisfy the third preset condition.

9. The trailer hook control system according to claim 8, characterized in that: The contact collector includes a micro switch. When the unlocking disk presses the contact collector, the micro switch is in a normally open state. When the unlocking disk does not press the contact collector, the micro switch is in a normally closed state.

10. A vehicle, characterized in that: Including the trailer hook control system as described in any one of claims 7-9.

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