Magnetic attraction unit control method and system for vehicle door

Abstract

The invention discloses a magnetic attraction unit control method and system for a vehicle door. The method comprises the steps that vehicle operation information and environment information are obtained; according to the vehicle operation information and the environment information, magnetic attraction force of a vehicle door magnetic attraction unit is obtained; controlling a vehicle door magnetic attraction unit to attract a vehicle door according to the magnetic attraction force; and when a collision trigger signal sent by the safety air bag electronic control unit is obtained, the magnetic attraction force of the vehicle door magnetic attraction unit is controlled to be invalid according to the collision trigger signal. Based on the data processing flow, a traditional mechanical lock and a sealing strip are replaced, so that the light weight and the high-speed sealing performance of the vehicle door are improved. Meanwhile, an emergency opening mechanism is provided, it is ensured that after the main power source fails, the vehicle door can be quickly unlocked, and a channel is provided for rescue.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle door lock, in particular to a magnetic suction unit control method and system for vehicle door. BACKGROUND

[0002] The traditional vehicle door system relies on mechanical latch and passive rubber seal strip, which has the following inherent defects: 1. Weight and complexity: mechanical lock structure is complex, heavy and occupies space.

[0003] 2. High-speed wind noise: passive sealing may cause local deformation of the seal strip due to negative pressure inside and outside the vehicle at high speed, resulting in air leakage and wind noise.

[0004] 3. Collision safety hazard: in a collision accident, the vehicle door may be stuck due to structural deformation of the mechanical lock, and the electrical control system fails due to power failure, hindering rescue personnel from opening the door in time and delaying the golden rescue time.

[0005] The existing electric suction door is only a supplement to the mechanical lock and cannot solve the above-mentioned fundamental problems, nor does it provide a reliable emergency opening scheme in the case of complete power failure. SUMMARY

[0006] The present application provides a magnetic suction unit control method and system for vehicle door, which replaces the traditional mechanical lock and seal strip to realize lightweight and high-speed sealing of the vehicle door. The emergency opening mechanism provided ensures that the vehicle door can be quickly unlocked after the main power fails, providing a passage for rescue. In a first aspect, a magnetic suction unit control method for vehicle door is provided, comprising: obtaining vehicle running information and environmental information; obtaining the magnetic suction force of the vehicle door magnetic suction unit according to the vehicle running information and the environmental information; controlling the vehicle door magnetic suction unit to adhere to the vehicle door according to the magnetic suction force; when a collision trigger signal sent by an airbag electronic control unit is obtained, controlling the magnetic suction force of the vehicle door magnetic suction unit according to the collision trigger signal.

[0007] In some embodiments, the magnetic suction force of the vehicle door magnetic suction unit is obtained according to the vehicle running information and the environmental information, comprising: obtaining the basic magnetic force of the vehicle door magnetic suction unit; obtaining the dynamic compensation force of the vehicle door magnetic suction unit according to the vehicle running information; obtaining the environmental compensation force of the vehicle door magnetic suction unit according to the environmental information; obtaining the magnetic suction force of the vehicle door magnetic suction unit according to the basic magnetic force, the dynamic compensation force and the environmental compensation force.

[0008] In some embodiments, the method for obtaining the basic magnetic force of the door magnetic attraction unit is shown in the following formula: ; In the formula, F base denoted as , where μ is the basic magnetic force of the door magnetic attraction unit; μ0 is the permeability of free space; N is the number of turns of the electromagnetic coil; I0 is the basic sustaining current; A is the effective area of ​​the magnetic pole; and g0 is the effective air gap length.

[0009] In some embodiments, the method for obtaining the dynamic compensation force of the door magnetic suction unit based on the vehicle operation information is as follows: ; In the formula, F dynamic (V) represents the dynamic compensation force of the magnetic door unit; v represents the vehicle speed; k1 represents the linear response coefficient; k2 represents the nonlinear amplification coefficient; α represents the nonlinear growth rate; and F0 represents the basic sealing force.

[0010] In some embodiments, the method for obtaining the environmental compensation force of the door magnetic suction unit based on the environmental information is shown in the following formula: ; In the formula, F compensation ΔP is the environmental compensation force of the magnetic door suction unit; ΔP is the pressure difference between the inside and outside of the vehicle; ΔT is the temperature difference compensation; θ is the door deformation angle; β is the pressure difference sensitivity coefficient; γ is the temperature compensation coefficient; δ is the deformation compensation coefficient.

[0011] In some embodiments, the method for obtaining the magnetic attraction force of the door magnetic attraction unit based on the basic magnetic force, the dynamic compensation force, and the environmental compensation force is shown in the following formula: ; In the formula, F total F represents the magnetic attraction force of the door magnetic unit. base The basic magnetic force for the car door magnetic attraction unit; F dynamic (V) represents the dynamic compensation force of the door magnetic attraction unit; F compensation Environmental compensation force for the magnetic door suction unit.

[0012] In some embodiments, when a collision trigger signal is received from the airbag electronic control unit, controlling the magnetic attraction force of the door magnetic attraction unit to fail according to the collision trigger signal includes: The system acquires the collision trigger signal sent by the airbag electronic control unit and controls the door resistor to fail based on the collision trigger signal. Obtain the reverse current obtained when the car door is opened; The reverse current is controlled to act on the door magnetic suction unit through the failed door resistor, so as to disable the magnetic suction force of the door magnetic suction unit.

[0013] In some embodiments, prior to acquiring vehicle operation information and environmental information, the following steps are included: When the door is detected to be closed, the door magnetic unit is controlled to attach to the door based on a buffer algorithm.

[0014] Secondly, a pressure-intelligent adjustable automotive wiper system is provided, including: The information acquisition module is used to acquire vehicle operation information and environmental information; The magnetic attraction force calculation module is communicatively connected to the information acquisition module and is used to obtain the magnetic attraction force of the door magnetic attraction unit based on the vehicle operation information and the environmental information. An adsorption control module, communicatively connected to the magnetic force calculation module, is used to control the door magnetic adsorption unit to adsorb the door according to the magnetic force; and... The magnetic attraction failure module is communicatively connected to the adsorption control module. When a collision trigger signal is received from the airbag electronic control unit, the module controls the magnetic attraction force of the door magnetic attraction unit to fail according to the collision trigger signal.

[0015] Thirdly, embodiments of the present invention provide a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the magnetic suction unit control method for a vehicle door as described above.

[0016] Fourthly, embodiments of the present invention provide an electronic device, including a storage medium, a processor, and a computer program stored in the storage medium and executable on the processor, wherein the processor, when executing the computer program, implements the magnetic suction unit control method for a vehicle door as described above.

[0017] Compared with the prior art, the advantages of the present invention are as follows: 1. Lightweight: When the door is detected to be closed, the door magnetic unit is controlled to adhere to the door based on a buffer algorithm, thus eliminating the bulky mechanical lock and reducing the weight and energy consumption of the door.

[0018] 2. High-performance sealing: The basic magnetic force of the door magnetic suction unit is obtained; the dynamic compensation force of the door magnetic suction unit is obtained based on vehicle operating information; the environmental compensation force of the door magnetic suction unit is obtained based on environmental information; the magnetic attraction force of the door magnetic suction unit is obtained based on the basic magnetic force, the dynamic compensation force, and the environmental compensation force; then, the door magnetic suction unit is controlled to attract the door according to the magnetic attraction force. Therefore, this invention achieves proactive optimization of sealing performance based on operating conditions, solving the technical problem of air leakage of the sealing strip caused by the outward suction of the door due to high-speed negative air pressure, while significantly reducing wind noise and improving quietness and energy economy.

[0019] 3. Top-tier safety: When a collision trigger signal is received from the airbag electronic control unit, the magnetic attraction force of the door magnetic unit is disabled based on the collision trigger signal. Therefore, this invention provides a pure electromechanical backup door opening solution linked to the airbag system, providing the highest level of redundancy protection for occupant safety and solving the rescue problem after a collision and power outage. Attached Figure Description

[0020] Figure 1 This is a schematic flowchart of an embodiment of the magnetic suction unit control method for a vehicle door according to the present invention; Figure 2 This is a schematic flowchart of another embodiment of the magnetic suction unit control method for vehicle doors according to the present invention; Figure 3 This is a schematic flowchart of another embodiment of the magnetic suction unit control method for vehicle doors according to the present invention; Figure 4 This is a schematic diagram of the structure of a magnetic suction unit control system for a car door according to the present invention. Detailed Implementation

[0021] Referring now to specific embodiments of the invention, examples of which are illustrated in the accompanying drawings. Although the invention will be described in conjunction with specific embodiments, it will be understood that it is not intended to limit the invention to the described embodiments. Rather, it is intended to cover variations, modifications, and equivalents included within the spirit and scope of the invention as defined by the appended claims. It should be noted that the method steps described herein can be implemented by any functional block or functional arrangement, and any functional block or functional arrangement can be implemented as a physical entity or a logical entity, or a combination of both.

[0022] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Note: The examples described below are merely specific examples and are not intended to limit the embodiments of the present invention to the specific steps, values, conditions, data, order, etc. Those skilled in the art can utilize the concept of the present invention to construct more embodiments not mentioned herein by reading this specification.

[0024] Please see Figure 1 The present invention provides a magnetic attraction unit control method for a vehicle door, the method comprising: Step S100: When the door is detected to be closed, the door magnetic unit is controlled to attract the door based on the buffer algorithm. Specifically, in this embodiment of the invention, when the door is sensed to be nearing closure, an increasing current is output based on the real-time position of the door, causing the door magnetic suction unit to generate a guiding force, gently guiding the door to the closed position. During the final buffer phase of the door closing process, a buffering algorithm is activated to adjust the magnetic force of the magnetic suction unit to smoothly decelerate the door to a standstill, and then a locking pulse is issued to cause the magnetic suction unit to generate maximum holding force. Simultaneously, the control unit of this invention pre-stores multiple "force-displacement" and "damping-speed" curve motion states, allowing the user to select different modes (such as comfort and sport) and control the current to make the actual feel conform to the selected curve.

[0025] The magnetic unit is a magnetic sealing strip, which is a composite material sealing component. Its feature is that magnetic materials (such as ferrite magnets, neodymium iron boron permanent magnets, etc.) are embedded in the traditional sealing strip.

[0026] The buffer algorithm is an intelligent control logic for the final stage of door closing. Its core objective is to dynamically adjust the magnetic force of the magnetic sealing strip so that the door stops smoothly according to a preset deceleration curve when it is close to being fully closed, avoiding the impact, noise and component wear caused by "hard impact" closing.

[0027] It should be noted that the door closing process can be divided into three stages: Initial acceleration phase: Manually / electrically push open the car door, and move towards the closing direction by inertia or motor power; Mid-stable phase: The car door approaches the closed position at a relatively fast speed, and the magnetic force of the magnetic sealing strip begins to appear, which corresponds to a slight attraction to the car door; The final buffer zone: When the car door is only a few centimeters (e.g., 5-10mm) away from being fully closed, continuing to move at the original speed will cause it to "suddenly close" due to the sudden increase in magnetic attraction. Therefore, the buffer algorithm intervenes in this "final buffer zone," adjusting the magnetic force in real time to apply a resistance opposite to the direction of movement, allowing the door speed to smoothly decrease from a relatively fast state to zero, ultimately achieving a "silent and impact-free" closure. The algorithm logic is as follows: based on sensor data, it calculates the required magnetic force adjustment according to a preset "deceleration curve" (e.g., uniform deceleration, exponential deceleration). For example, if the door speed is v and the remaining distance is s, the algorithm will calculate the reverse resistance required to "decelerate the door from v to 0 within distance s," which is the braking force that the magnetic force should provide.

[0028] Step S200: Obtain vehicle operation information and environmental information; See also Figure 2 As shown, step S300, based on the vehicle operation information and the environmental information, obtains the magnetic attraction force of the door magnetic attraction unit, including: Step S310, the method for obtaining the basic magnetic force of the door magnetic attraction unit is shown in the following formula: ; In the formula, F base The magnetic force of the door magnetic attraction unit is μ0; the permeability of free space is μ0; the number of turns of the electromagnetic coil is N, 100≤N≤500; I0 is the basic holding current, 0.1A≤I0≤1.0A, used to control the basic energy consumption and door opening force; A is the effective area of ​​the magnetic pole, A = ξ·A door , where 0.2 ≤ ξ ≤ 0.5, ξ is the magnetic circuit efficiency coefficient or magnetic pole area utilization coefficient; g0 is the effective air gap length, 0.5mm≤g0≤3.0mm.

[0029] Step S320: Based on the vehicle operation information, the dynamic compensation force of the door magnetic suction unit is obtained in the following way: ; In the formula, F dynamic (V) represents the dynamic compensation force of the magnetic door closing unit; v represents the vehicle speed. k1 is the linear response coefficient, which is the basic compensation force required for door sealing at low to medium speeds, 0.005≤k1≤0.050 N / (km / h)². k2 is the nonlinear amplification factor, which is the ability to compensate for pressure changes caused by airflow separation at medium and high speeds. 5≤k2≤60N. α is the nonlinear growth rate, which is the exponential rate at which airflow instability increases with vehicle speed, 0.010≤α≤ 0.040(km / h). - ¹; F0 is the basic sealing force, ranging from 20 to 100 N.

[0030] The methods for determining the coefficients k1, k2, and α include: The pressure distribution on the inner and outer surfaces of the vehicle door is obtained by computational fluid dynamics simulation at different vehicle speeds v; then the pressure difference function ΔP(v) between the inner and outer surfaces of the door is calculated; based on the effective area Aeff of the door, the theoretical sealing force requirement Freq(v) = ΔP(v) × Aeff is calculated. The least squares method is used to fit the formula. ; By optimizing the algorithm, k1, k2, and α are adjusted to reduce the fitting error. Minimum; By adjusting the values ​​of parameters k1, k2, and α, the fitting error between the model's predicted output and the experimental data can be minimized. The fitting determination coefficient R² > 0.98 is the core quantitative standard used to verify and measure the overall fitting accuracy and reliability of the model under the optimal set of parameters. It indicates that the model can explain more than 98% of the data fluctuations, thus objectively demonstrating the effectiveness of the parameter optimization process and the superiority of the technical solution.

[0031] Therefore, the final determined coefficients k1, k2, and α must satisfy the following condition: the coefficient of determination R² > 0.98.

[0032] Step S330: Based on the environmental information, the method for obtaining the environmental compensation force of the door magnetic suction unit is as follows: ; In the formula, F compensation ΔP is the environmental compensation force of the magnetic door unit; ΔP is the pressure difference between the inside and outside of the vehicle; ΔT is the temperature difference compensation; θ is the door deformation angle.

[0033] β is the pressure difference sensitivity coefficient, β= F / (ΔP) is essentially the system's response intensity to static pressure difference changes. It is obtained through mechanical testing of the sealing strip. The magnetic attraction force is adjusted according to ΔP. The pressure difference sensitivity coefficient β must satisfy 0.03≤β≤0.20 N / Pa.

[0034] γ is the temperature compensation coefficient, and its mathematical form is γ = γ rubber + γ magnet + γ gap Its essence is to compensate for the changes in sealing force caused by the thermal expansion and contraction of materials.

[0035] γ rubber The temperature coefficient of rubber is the elastic modulus, hardness, and volume of rubber, which change significantly with temperature (it usually softens as the temperature rises), directly affecting the sealing contact force and damping characteristics. This is usually the most important part of the formula.

[0036] γ magnet The temperature coefficient of a magnet is denoted as NdFeB. The magnetic properties of most permanent magnets (such as NdFeB) weaken as the temperature increases (i.e., they have a negative temperature coefficient), which directly affects the sealing force or attraction force generated by the magnetic force.

[0037] γ gap The temperature coefficient of mechanical clearance. Different materials (such as metal shells and internal components) have different coefficients of thermal expansion. Temperature changes can cause micron-level changes in the dimensions of critical mating clearances, which can greatly affect the sealing effect.

[0038] δ is the deformation compensation coefficient, used to compensate for the micro-deformation of the car door caused by stress or aging. It is measured by distributed strain gauges and aims to achieve self-diagnosis and self-compensation, maintaining consistent sealing performance during long-term use.

[0039] Step S340, the method for obtaining the magnetic attraction force of the door magnetic attraction unit based on the basic magnetic force, the dynamic compensation force, and the environmental compensation force is shown in the following formula: ; In the formula, F total F represents the magnetic attraction force of the door magnetic unit. base The basic magnetic force for the car door magnetic attraction unit; F dynamic (V) represents the dynamic compensation force of the door magnetic attraction unit; F compensation Environmental compensation force for the magnetic door suction unit.

[0040] Step S400: Control the door magnetic suction unit to attract the door according to the magnetic force.

[0041] Specifically, the system receives speed signals from the vehicle control layer and gradually increases the magnetic attraction force according to the vehicle speed. The magnitude of the magnetic attraction force is determined by factors such as vehicle speed, aerodynamic coefficient, internal and external pressure difference, and temperature, thereby actively counteracting the outward suction of the door caused by negative air pressure, ensuring the seal between the door and the sealing strip, guaranteeing the airtightness of the vehicle, and suppressing high-speed wind noise caused by air leakage from the sealing strip.

[0042] Step S500: When a collision trigger signal is received from the airbag electronic control unit, the magnetic attraction force of the door magnetic attraction unit is disabled according to the collision trigger signal, including: The system acquires the collision trigger signal sent by the airbag electronic control unit and controls the door resistor to fail based on the collision trigger signal. Obtain the reverse current obtained when the car door is opened; The reverse current is controlled to act on the door magnetic suction unit through the failed door resistor, so as to disable the magnetic suction force of the door magnetic suction unit.

[0043] Specifically, in this embodiment of the invention, when the vehicle cannot open its doors after a power outage following a safety accident, a micro-motor is present at the door handle. This micro-motor generates electricity when the door handle is pulled, producing a reverse current to counteract the magnetic attraction and open the door. The failure of the resistor does not directly depend on the mechanical collision itself, but is controlled by a signal from the airbag ECU (Electronic Control Unit). This means that the circuit is only activated in a severe collision where the vehicle determines that the airbags need to deploy, greatly reducing the risk of false triggering. Without using an external power source or independent power control, the generated current acts directly on the actuator, bypassing potentially damaged main vehicle wiring or the main controller. Through this simple design, the inability to open the doors after an accident is prevented.

[0044] See also Figure 3 As shown, when a severe collision occurs, the airbag ECU confirms and triggers the airbag deployment. Simultaneously, the airbag ECU sends a collision trigger signal, which forces the normally closed resistor of the door to fail. At the same time, rescue personnel forcefully operate the door handle, causing a micro-generator built into the handle to generate a sufficiently strong reverse current. Therefore, the failed resistor provides a low-impedance path for the reverse current, which is directly applied to the magnetic closure unit. The magnetic field of the magnetic closure unit is canceled out, causing the door locking force to disappear instantly. At this point, the door can be pushed open, enabling rapid rescue.

[0045] In summary, when the vehicle is in normal use, this invention detects that the door is closed and controls the door magnetic suction unit to adhere to the door based on a buffer algorithm. Then, based on the vehicle operation information and the environmental information, the magnetic attraction force of the door magnetic suction unit is obtained. The door magnetic suction unit is then controlled to adhere to the door according to the magnetic attraction force. Therefore, it provides an intelligent and personalized door closing experience and automatically enhances the seal at high speeds.

[0046] In the event of a severe collision and airbag deployment, the vehicle's main power supply may have failed. When the airbag electronic control unit receives a collision trigger signal, it disables the magnetic attraction of the door's magnetic closure unit based on this signal. Upon arrival at the scene, any forceful pulling, pressing, or impact on the door handle will directly activate a micro-generator. Since the airbag ECU has preemptively disabled the high-resistance resistor, the generated current flows directly to the magnetic unit, forcibly unlocking it. Rescuers will feel the door's locking force instantly disappear, allowing them to open the door smoothly. The entire process requires no electricity and is safe and reliable.

[0047] See also Figure 4 As shown, this embodiment of the invention also provides a pressure-intelligent adjustable automotive wiper system, comprising: The information acquisition module is used to acquire vehicle operation information and environmental information; The magnetic attraction force calculation module is communicatively connected to the information acquisition module and is used to obtain the magnetic attraction force of the door magnetic attraction unit based on the vehicle operation information and the environmental information. An adsorption control module, communicatively connected to the magnetic force calculation module, is used to control the door magnetic adsorption unit to adsorb the door according to the magnetic force; and... The magnetic attraction failure module is communicatively connected to the adsorption control module. When a collision trigger signal is received from the airbag electronic control unit, the module controls the magnetic attraction force of the door magnetic attraction unit to fail according to the collision trigger signal.

[0048] In summary, the main innovations of this invention are as follows: 1. Lightweight: When the door is detected to be closed, the door magnetic unit is controlled to adhere to the door based on a buffer algorithm, thus eliminating the bulky mechanical lock and reducing the weight and energy consumption of the door.

[0049] 2. High-performance sealing: The basic magnetic force of the door magnetic suction unit is obtained; the dynamic compensation force of the door magnetic suction unit is obtained based on vehicle operating information; the environmental compensation force of the door magnetic suction unit is obtained based on environmental information; the magnetic attraction force of the door magnetic suction unit is obtained based on the basic magnetic force, the dynamic compensation force, and the environmental compensation force; then, the door magnetic suction unit is controlled to attract the door according to the magnetic attraction force. Therefore, this invention achieves proactive optimization of sealing performance based on operating conditions, solving the technical problem of air leakage of the sealing strip caused by the outward suction of the door due to high-speed negative air pressure, while significantly reducing wind noise and improving quietness and energy economy.

[0050] 3. Top-tier safety: When a collision trigger signal is received from the airbag electronic control unit, the magnetic attraction force of the door magnetic unit is disabled based on the collision trigger signal. Therefore, this invention provides a pure electromechanical backup door opening solution linked to the airbag system, providing the highest level of redundancy protection for occupant safety and solving the rescue problem after a collision and power outage.

[0051] Specifically, this embodiment corresponds one-to-one with the above method embodiments. The functions of each module have been described in detail in the corresponding method embodiments, so they will not be repeated here.

[0052] Based on the same inventive concept, embodiments of this application also provide a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements all or part of the method steps of the above method.

[0053] The present invention can implement all or part of the processes in the above methods, or it can be accomplished by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when the computer program is executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc. It should be noted that the content contained in the computer-readable medium can be appropriately added or removed according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electrical carrier signals and telecommunication signals.

[0054] Based on the same inventive concept, embodiments of this application also provide an electronic device, including a memory and a processor. The memory stores a computer program that runs on the processor. When the processor executes the computer program, it implements all or part of the method steps described above.

[0055] The processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor can be a microprocessor or any conventional processor. The processor is the control center of the computer device, connecting all parts of the computer device through various interfaces and lines.

[0056] Memory can be used to store computer programs and / or modules. The processor performs various functions of the computer device by running or executing the computer programs and / or modules stored in the memory, and by accessing data stored in the memory. Memory can primarily include a program storage area and a data storage area. The program storage area can store the operating system and at least one application program required for a function (e.g., sound playback, image playback, etc.); the data storage area can store data created based on the use of the mobile phone (e.g., audio data, video data, etc.). Furthermore, memory can include high-speed random access memory, and can also include non-volatile memory, such as hard disks, RAM, plug-in hard disks, SmartMedia Cards (SMC), Secure Digital (SD) cards, Flash Cards, at least one disk storage device, flash memory device, or other volatile solid-state storage devices.

[0057] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, servers, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage and optical storage) containing computer-usable program code.

[0058] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), servers, and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0059] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0060] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0061] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A method for controlling a magnetic attraction unit for a vehicle door, characterized in that, include: Obtain vehicle operation information and environmental information; The magnetic attraction force of the door magnetic suction unit is obtained based on the vehicle operation information and the environmental information. The door magnetic attraction unit controls the door to adhere to the door based on the magnetic attraction force. When a collision trigger signal is received from the airbag electronic control unit, the magnetic attraction force of the door magnetic attraction unit is disabled according to the collision trigger signal.

2. The magnetic attraction unit control method for vehicle doors as described in claim 1, characterized in that, The step of obtaining the magnetic attraction force of the door magnetic attraction unit based on the vehicle operation information and the environmental information includes: Obtain the basic magnetic force of the door magnetic attraction unit; Based on the vehicle operation information, the dynamic compensation force of the door magnetic suction unit is obtained; Based on the environmental information, the environmental compensation force of the door magnetic suction unit is obtained; The magnetic attraction force of the door magnetic attraction unit is obtained based on the basic magnetic force, the dynamic compensation force, and the environmental compensation force.

3. The magnetic attraction unit control method for vehicle doors as described in claim 2, characterized in that, The method for obtaining the basic magnetic force of the car door magnetic attraction unit is shown in the following formula: ； In the formula, F base denoted as , where μ is the basic magnetic force of the door magnetic attraction unit; μ0 is the permeability of free space; N is the number of turns of the electromagnetic coil; I0 is the basic sustaining current; A is the effective area of ​​the magnetic pole; and g0 is the effective air gap length.

4. The magnetic attraction unit control method for vehicle doors as described in claim 2, characterized in that, The method for obtaining the dynamic compensation force of the door magnetic suction unit based on the vehicle operation information is shown in the following formula: ； In the formula, F dynamic (V) represents the dynamic compensation force of the magnetic door unit; v represents the vehicle speed; k1 represents the linear response coefficient; k2 represents the nonlinear amplification coefficient; α represents the nonlinear growth rate; and F0 represents the basic sealing force.

5. The magnetic attraction unit control method for a vehicle door as described in claim 2, characterized in that, The method for obtaining the environmental compensation force of the door magnetic suction unit based on the environmental information is shown in the following formula: ； In the formula, F compensation ΔP is the environmental compensation force of the magnetic door unit; ΔP is the pressure difference between the inside and outside of the vehicle; ΔT is the temperature difference compensation; θ is the door deformation angle. β is the pressure difference sensitivity coefficient; γ is the temperature compensation coefficient; δ is the deformation compensation coefficient.

6. The magnetic attraction unit control method for a vehicle door as described in claim 1, characterized in that, The method for obtaining the magnetic attraction force of the car door magnetic attraction unit based on the basic magnetic force, the dynamic compensation force, and the environmental compensation force is shown in the following formula: ； In the formula, F total F represents the magnetic attraction force of the door magnetic unit. base The basic magnetic force for the car door magnetic attraction unit; F dynamic (V) represents the dynamic compensation force of the door magnetic closure unit; F compensation Environmental compensation force for the magnetic door suction unit.

7. The magnetic attraction unit control method for a vehicle door as described in claim 1, characterized in that, When a collision trigger signal is received from the airbag electronic control unit, the magnetic attraction force of the door magnetic attraction unit is disabled according to the collision trigger signal, including: The system acquires the collision trigger signal sent by the airbag electronic control unit and controls the door resistor to fail based on the collision trigger signal. Obtain the reverse current obtained when the car door is opened; The reverse current is controlled to act on the door magnetic suction unit through the failed door resistor, so as to disable the magnetic suction force of the door magnetic suction unit.

8. The magnetic attraction unit control method for a vehicle door as described in claim 1, characterized in that, Before acquiring vehicle operation information and environmental information, the following steps are included: When the door is detected to be closed, the door magnetic unit is controlled to attach to the door based on a buffer algorithm.

9. A magnetic attraction unit control system for vehicle doors, characterized in that, include: The information acquisition module is used to acquire vehicle operation information and environmental information; The magnetic attraction force calculation module is communicatively connected to the information acquisition module and is used to obtain the magnetic attraction force of the door magnetic attraction unit based on the vehicle operation information and the environmental information. The adsorption control module is communicatively connected to the magnetic force calculation module and is used to control the door magnetic adsorption unit to adsorb the door according to the magnetic force. as well as, The magnetic attraction failure module is communicatively connected to the adsorption control module. When a collision trigger signal is received from the airbag electronic control unit, the module controls the magnetic attraction force of the door magnetic attraction unit to fail according to the collision trigger signal.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the magnetic suction unit control method for vehicle doors as described in any one of claims 1 to 8.

Images