Vehicle control method and system based on low frequency antenna

Abstract

This invention discloses a vehicle control method and system based on a low-frequency antenna. The method includes: receiving an active locking command; when the active locking command is triggered by a locking button on the vehicle body, if the number of first keys is greater than the number of second keys, then controlling the vehicle to lock. The first number of keys refers to the total number of keys in the unlocking area, and the second number of keys refers to the total number of keys in the locking exclusion area. A single low-frequency antenna is disposed in the center of the vehicle. When driven, this antenna forms a low-frequency signal field centered on the vehicle, with the signal strength attenuating outwards in concentric circles. A locking exclusion area and an unlocking area are divided from this low-frequency signal field. The locking exclusion area covers the front and rear seat areas inside the vehicle, and the unlocking area includes and is larger than the locking exclusion area, extending to a predetermined range around the vehicle body. This invention provides a low-cost and reliable vehicle locking management solution.

Description

Technical Field

[0001] This invention relates to vehicle control technology, and more particularly to a vehicle control method and system based on a low-frequency antenna. Background Technology

[0002] With the development of automotive electronics technology, keyless entry and keyless start systems have become basic features for vehicles to enhance user experience and convenience. Existing keyless entry systems are typically referred to as passive keyless entry (PKE) systems, the core of which lies in enabling vehicle locking and unlocking without requiring the user to actively operate the key.

[0003] This keyless entry system typically includes: a smart key carried by the user, an onboard controller, and multiple low-frequency antennas and high-frequency receivers mounted on the vehicle. Its basic working mechanism involves two main scenarios: unlocking and locking.

[0004] In unlocking scenarios, when a user approaches the vehicle with a valid smart key and triggers a switch on the door handle (such as a microswitch or capacitive sensor), the vehicle controller activates low-frequency antennas installed in preset locations such as the doors, dashboard, and trunk to transmit a 125kHz low-frequency wake-up signal. The effective coverage of this low-frequency signal is typically limited to within a few meters of the vehicle's perimeter. When a valid smart key enters this low-frequency magnetic field coverage area, its internal low-frequency receiving module is activated and sends an encrypted high-frequency signal containing authentication information to the vehicle via a high-frequency transmitting module. After receiving and verifying the signal, the vehicle's high-frequency receiver controls the unlocking process.

[0005] In the locking scenario, when a user leaves the vehicle and touches the locking sensor on the door handle, the system also wakes up the key and completes two-way authentication via a low-frequency antenna. The vehicle first sends a locking request command via the low-frequency antenna, and the smart key, upon receiving the command, also transmits authentication information back via a high-frequency signal. After verifying the user's identity, the vehicle executes the locking operation. In some settings, when the user leaves the vehicle with the key a certain distance, the system will also automatically determine and execute the locking based on the attenuation of the low-frequency signal strength.

[0006] In the aforementioned process, the design and placement of the low-frequency antenna are crucial. Existing technology utilizes the short transmission distance and distance sensitivity of low-frequency signals (125kHz) to determine the key's specific location relative to the vehicle by measuring the signal strength indicators received by the smart key from different antenna field strengths (e.g., distinguishing whether the key is located on the left front door outside the vehicle, in the driver's seat, or in the rear seat inside the vehicle). This location determination is a key safety basis for the vehicle to decide whether to unlock, lock, or allow starting, effectively preventing security vulnerabilities such as the external door handle being accidentally triggered when the key is inside the vehicle, or the key being accidentally locked inside the vehicle from the outside.

[0007] To achieve the aforementioned location discrimination function, vehicles typically require multiple low-frequency antennas due to the physical limitations of low-frequency signals. First, the effective coverage of a single low-frequency antenna is limited and easily absorbed and shielded by metal components such as the vehicle's sheet metal and interior trim, making seamless coverage of the entire vehicle's perimeter and interior space difficult. Second, accurate area discrimination relies on comparing and analyzing the signal strength of multiple antennas. Only through multiple antennas distributed in different locations on the vehicle (such as doors, dashboard, trunk, etc.) can the system acquire sufficient location feature information to accurately distinguish whether the key is located near a specific door outside the vehicle or in the front or rear seats inside.

[0008] In practice, a basic system requires at least 3 to 4 antennas: for example, at least one external antenna mounted on the driver's side door handle for basic unlocking, and at least 2 to 3 internal antennas distributed in locations such as the dashboard and armrest for interior coverage. However, in real-world applications, the number of antennas increases with vehicle wheelbase and vehicle body complexity; to achieve fully sensor-activated unlocking for all four doors and the trunk, 5 or more external antennas are typically required. Therefore, in existing technologies, the number of low-frequency antennas is often a trade-off between performance and cost. High-end models may use 5 to 7 antennas for an optimal experience, while optimized solutions attempt to achieve a balance between performance and cost with a configuration of 3 to 4 antennas through improved antenna design. Summary of the Invention

[0009] This invention provides a vehicle control method and system based on a low-frequency antenna, which achieves reliable vehicle interlocking management in a low-cost manner.

[0010] An embodiment of the present invention provides a vehicle control method based on a low-frequency antenna, comprising: receiving an active locking command; when the active locking command is generated because a locking button on the vehicle body is triggered, determining whether a first number of keys is greater than a second number of keys; and when the first number of keys is greater than the second number of keys, controlling the vehicle to lock; wherein, the first number of keys refers to the total number of keys in the unlocking area, and the second number of keys refers to the total number of keys in the locking exclusion area; wherein, a single low-frequency antenna is disposed in the middle of the vehicle, and when the single low-frequency antenna is driven, it forms a low-frequency signal field centered on the vehicle and with signal strength attenuating outward in concentric circles; a locking exclusion area and an unlocking area are divided from the low-frequency signal field, the locking exclusion area covering the front and rear seat areas inside the vehicle, and the unlocking area including and being larger than the locking exclusion area and extending to a predetermined range around the vehicle body.

[0011] In some embodiments, the method further includes: searching an authentication area when starting the vehicle; and allowing the vehicle to start if a key is found in the authentication area; wherein the authentication area is also defined from the low-frequency signal field, and the authentication area includes and is larger than the locking exclusion area and extends to the vehicle body, while being smaller than the unlocking area.

[0012] In some implementations, the unlocking area, authentication area, and locking exclusion area are all elliptical.

[0013] In some implementations, the boundaries of the unlocking area, authentication area, and locking exclusion area are set by RSSI thresholds; when searching for a key, the area where the key is located is determined by the RSSI value returned by the key.

[0014] In some implementations, after controlling the vehicle to lock, the key in the lock exclusion area is further disabled.

[0015] In some embodiments, the method further includes: performing a locking operation when the active locking command is generated because the locking key on the key is triggered; and determining whether the number of third keys is greater than the number of second keys; when the number of third keys is greater than the number of second keys, disabling the keys in the locking exclusion area; wherein the number of third keys refers to the total number of stored paired keys.

[0016] An embodiment of the present invention provides a vehicle control system based on a low-frequency antenna, comprising: a single low-frequency antenna disposed in the center of the vehicle, which, when driven, forms a low-frequency signal field centered on the vehicle and whose signal strength attenuates outward in concentric circles; dividing the low-frequency signal field into a locking exclusion area and an unlocking area centered on the single low-frequency antenna, wherein the locking exclusion area covers the front and rear seat areas inside the vehicle, and the unlocking area includes and is larger than the locking exclusion area and extends to a preset distance around the vehicle body; and a processor for receiving an active locking command and controlling the vehicle to lock when the number of first keys is greater than the number of second keys; wherein, when the active locking command is generated by the locking button on the vehicle body being triggered, the number of first keys refers to the total number of keys in the unlocking area, and the number of second keys refers to the total number of keys in the locking exclusion area.

[0017] A computer device / apparatus / system according to an embodiment of the present invention includes a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of the above method.

[0018] An embodiment of the present invention provides a computer-readable storage medium having a computer program / instructions stored thereon, which, when executed by a processor, implements the steps of the above method.

[0019] An embodiment of the present invention provides a computer program product, including a computer program / instruction that, when executed by a processor, implements the steps of the above method.

[0020] Beneficial effects of the embodiments of the present invention:

[0021] The vehicle active locking scheme of this invention is implemented based on a single low-frequency antenna, thus offering lower cost compared to four- or six-antenna schemes. Furthermore, this invention deeply analyzes the signal gradient of the single low-frequency antenna, defining multiple functional areas such as a locking exclusion area and an unlocking area. During active locking, the locking operation is controlled by the quantitative relationship between the number of keys scanned in the locking exclusion area and the number scanned in the unlocking area, thereby preventing accidental key locking and ensuring locking reliability. Therefore, this invention achieves reliable vehicle locking management in a low-cost manner. Attached Figure Description

[0022] Other details and advantages of the invention will become apparent from the detailed description provided below. It should be understood that the following drawings are merely illustrative and should not be considered as limiting the invention. A detailed description will be given below with reference to the drawings, in which:

[0023] Figure 1 This is a schematic diagram of a logical region defined from the signal field of a single LF antenna according to an embodiment of the present invention;

[0024] Figure 2 This is a flowchart illustrating an embodiment of the vehicle control method based on a low-frequency antenna of the present invention.

[0025] Figure 3 This is a flowchart illustrating another embodiment of the vehicle control method based on a low-frequency antenna of the present invention;

[0026] Figure 4 This is a schematic diagram of an embodiment of the vehicle control system based on a low-frequency antenna of the present invention;

[0027] Figure 5 This is a schematic diagram of an embodiment of a computer device / equipment / system of the present invention capable of implementing the above-described vehicle control method. Detailed Implementation

[0028] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.

[0029] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Furthermore, the terms "first," "second," etc., are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein.

[0030] This invention presents a vehicle control scheme based on a single LF (Low Frequency) antenna, which is more cost-effective than four-antenna or six-antenna schemes. In four-antenna or six-antenna schemes, the precise location of the key relative to the vehicle can be determined through the cooperation of multiple antennas (e.g., distinguishing whether the key is located at the left front door, right front door, rear door, driver's seat, or rear seat). Therefore, four-antenna or six-antenna schemes can execute vehicle control based on the precise location of the key. However, a single LF antenna cannot achieve the same precise positioning as four-antenna or six-antenna schemes. Traditional multi-antenna control schemes are not directly applicable to single LF antennas. Therefore, this embodiment conducts in-depth analysis and mining of the signal field of a single LF antenna, delineating multiple specific regions and combining the number of keys detected in each region to support the implementation of vehicle control functions (such as locking). This achieves reliable vehicle control management in a low-cost manner.

[0031] For example, such as Figure 1 The diagram shown is a schematic representation of an embodiment of the present invention, which divides the signal field of a single LF antenna into logical regions.

[0032] like Figure 1 As shown, a single LF antenna 10 is positioned in the center of the vehicle. The field strength radiation range of the LF antenna is a symmetrical elliptical structure on the horizontal plane. Since the door handles are also symmetrical about the central axis, to allow the subsequently defined logical areas to function better, the LF antenna 10 can be positioned in the center of the vehicle's interior space, for example, at the intersection of the vehicle's horizontal and vertical axes. Furthermore, a slightly off-center position makes it easier to cover the entire vehicle area with minimal leakage. Specifically, the LF antenna 10 can be positioned slightly rearward from the center of the driver and passenger door handles to enhance the accuracy of positioning the area near the door handles, and this position is less susceptible to common noise interference (from mobile phones, starter motors, wiper motors, etc.).

[0033] When the LF antenna 10 is in operation (driven), it forms a low-frequency signal field with signal strength attenuating outwards in concentric circles centered on it. In this embodiment of the invention, this low-frequency signal field is divided into an unlocking region 21, an authentication region 22, and a latch-out region 23. These three regions are concentric elliptical structures on a horizontal plane, with the unlocking region 21 covering the largest area, followed by the authentication region 22, and the latch-out region 23 the smallest. The boundaries of each region can be defined by an RSSI (Received Signal Strength Indication) threshold, the magnitude of which can be determined through calibration.

[0034] Specifically, the unlocking area 21 covers the interior area of ​​the vehicle and extends to a certain range outside the vehicle, generally extending to a distance of about 1 meter from the door handle, which is typically larger than the range an adult's outstretched arm would need to press the unlock button on the driver's side door handle. The authentication area 22 ensures no blind spots on the dashboard and completely covers the first and second row seats; additionally, while covering both the front and rear seats, it meets the demodulation standard for the LF signal, such as LF intensity minus noise intensity > 20 dB. The authentication area 22 may not have a distance requirement from the door handle, but it is larger than the locking exclusion area 23. This is because the authentication area 22 is primarily used during vehicle startup, and when the vehicle is started and the brakes are applied, it will face more interior interference, thus requiring greater tolerance. The locking exclusion area 23 is mainly used to prevent locking even if the car key is left inside the vehicle. It has a certain leakage at the driver and passenger door handles (the leakage area is generally a few centimeters from the door handle), thus meeting the demodulation standard for the LF signal while covering both the front and rear seats.

[0035] After defining the aforementioned area, vehicle control, such as locking and unlocking, can be implemented based on this area. In this embodiment, the relevant locking logic will be explained in detail.

[0036] like Figure 2 The diagram shown is a flowchart illustrating an embodiment of the vehicle control method based on a low-frequency antenna according to the present invention. Figure 2 This illustrates the locking logic in a PKE (Passive Keyless Entry) scenario, specifically the scenario where the vehicle is locked using the lock button on the door handle. This includes:

[0037] Step S201: Receive active locking command.

[0038] Step S202: When the active locking command received in step S201 is generated because the locking button on the vehicle body is triggered, determine whether the number of first keys is greater than the number of second keys.

[0039] The first key count refers to the total number of keys in the unlocking area 21, and the second key count refers to the total number of keys in the locking exclusion area 23. After receiving an active locking command, the number of keys in the unlocking area 21 and the locking exclusion area 23 can be determined by searching them. For example, the LF antenna 10 is driven to send signals to the surrounding area. After receiving the signal, the key returns the measured RSSI value in RF (radio frequency) mode. The area where the key is located can be determined by the RSSI value returned by the key.

[0040] Step S203: When the number of first keys is greater than the number of second keys, control the vehicle to lock.

[0041] In addition, if the number of first keys is less than or equal to the number of second keys, the system will refuse to lock and will remind the user. The reminder can be given by sound, light, SMS, or other means.

[0042] In addition, after controlling the vehicle to lock in step S203, the key in the lock exclusion area can be further disabled to prevent the key left in the vehicle from being illegally obtained and started.

[0043] In this embodiment, by rationally setting the position of the single LF antenna and fully exploring its signal field, an unlocking zone and a locking exclusion zone are defined to support vehicle locking management. Furthermore, when an active locking command is generated by triggering the locking button on the vehicle body, a simple comparison of the number of keys in the unlocking zone 21 and the locking exclusion zone 23 determines whether to execute the locking, thereby preventing the key from being accidentally locked inside the vehicle. Therefore, this embodiment achieves reliable vehicle locking management even with a single LF antenna configuration.

[0044] like Figure 3 The diagram shown is a flowchart illustrating an embodiment of the vehicle control method based on a low-frequency antenna according to the present invention. Figure 3 This illustrates the locking logic in a Remote Keyless Entry (RKE) scenario, specifically the locking mechanism used via the lock button on the car key. This includes:

[0045] Step S301: Receive active locking command. This active locking command is generated when the locking button on the key is triggered. For example, when the user presses the locking button on the key within the effective signal range of the LF antenna, the vehicle will receive an indication signal sent by the key, and generate an active locking command based on this indication signal.

[0046] Step S302: Execute the locking operation according to the active locking command in step S301.

[0047] In step S302, the locking operation is performed directly according to the active locking command without searching for the number of keys.

[0048] Step S303: Determine whether the number of third keys is greater than the number of second keys.

[0049] The third key quantity refers to the total number of stored paired keys; the second key quantity is the number of keys found in the locked exclusion area.

[0050] Step S304: When the number of third keys is greater than the number of second keys, disable the keys within the locking exclusion area. Here, the number of third keys refers to the total number of stored paired keys. It should be noted that keys that trigger the generation of active locking commands may not be disabled, and their location can be ignored.

[0051] Additionally, when the number of third keys is equal to or less than the number of second keys, disabling any key is prohibited.

[0052] In this embodiment, in the RKE scenario, the locking operation is performed directly based on the active locking command. Furthermore, after locking, if the number of keys in the locking exclusion area is detected to be less than the number of paired keys, then the keys in the locking exclusion area are allowed to be disabled, thereby preventing the unauthorized acquisition of missed keys and the resulting loss.

[0053] exist Figure 2 and 3 The embodiments described illustrate a scheme for implementing active vehicle locking by means of a logical region partitioned from a single LF antenna. In the scheme of this embodiment, the logical region partitioned from a single LF antenna can support more vehicle control scenarios, thereby improving the practicality of the single LF antenna. For example, when starting the vehicle, if a valid key is found in the authentication area, starting the vehicle is allowed. As another example, when unlocking the vehicle, if the unlock button on the vehicle body is detected to be pressed, and a key can be found in the unlock area, unlocking the vehicle is allowed. As yet another example, in a passive locking scenario (the vehicle is powered off and there are no new unlock / lock requests within a preset time in the unlocked state), a valid key can be searched in the locking exclusion area; if a valid key is found, locking is prohibited and the user is alerted.

[0054] like Figure 4 The diagram shown is a structural schematic of an embodiment of the vehicle control system based on a low-frequency antenna of the present invention, which includes: ECU 40, LF antenna 41, unlocking / locking button 42 on the vehicle body and key 43.

[0055] The LF antenna 41 is connected to the ECU 40 and is located in the center of the vehicle. When driven by the ECU 40, it forms a low-frequency signal field centered on the vehicle, with the signal strength attenuating outwards in concentric circles. This low-frequency signal field can be used to divide the vehicle into an unlocking zone, an unlocking zone, and an authentication zone. Figure 1 As shown.

[0056] The unlock / lock button 42 is connected to the ECU 40. It can be a capacitive structure to sense the user's pressing operation and generate a signal to be sent to the ECU 40.

[0057] The key 43 is wirelessly connected to the ECU 40, communicating with it via LF and RF signals. For example, when the key 43 is activated by the LF signal, it can measure the strength of the LF signal and send the measurement results and other information to the ECU 40 via the RF signal. Alternatively, when the lock / unlock button on the key 43 is triggered, the key 43 sends the relevant lock / unlock commands to the ECU 40 via the RF signal.

[0058] The ECU40 includes a processor 401 and an RF transceiver 402, wherein the RF transceiver 402 is used to receive and transmit RF signals to communicate with the key 43.

[0059] The processor 401 is specifically used to: receive an active locking command, and control the vehicle to lock when the number of first keys is greater than the number of second keys, wherein the number of first keys refers to the total number of keys in the unlocking area, and the number of second keys refers to the total number of keys in the locking exclusion area. In addition, the processor 401 can also execute various steps of the above method embodiments, which will not be elaborated here.

[0060] like Figure 5 The diagram shown is a structural schematic of an embodiment of the computer device / equipment / system 50 of the present invention, which includes a memory 52, a processor 50 and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of the above method.

[0061] In addition, an embodiment of the present invention provides a computer-readable storage medium storing a computer program / instructions thereon, which, when executed by a processor, implements the steps of the above method.

[0062] In addition, a computer program product according to an embodiment of the present invention includes a computer program / instruction that, when executed by a processor, implements the steps of the above method.

[0063] The descriptions of the above-described apparatus / device / system, storage medium, and program product embodiments are similar to those of the above-described method embodiments and have similar beneficial effects. For technical details not disclosed in the apparatus / device / system, storage medium, and program product embodiments of this application, please refer to the descriptions of the method embodiments of this application for understanding.

[0064] The aforementioned processor can be at least one of the following: Application Specific Integrated Circuit (ASIC), Digital Signal Processor (DSP), Digital Signal Processing Device (DSPD), Programmable Logic Device (PLD), Field Programmable Gate Array (FPGA), Central Processing Unit (CPU), controller, microcontroller, microprocessor, etc. It is understood that other electronic devices can also implement the functions of the aforementioned processor, and this application does not specifically limit the specific implementation.

[0065] The aforementioned computer storage media / memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), magnetic random access memory (FRAM), flash memory, magnetic surface memory, optical disc, or compact disc read-only memory (CD-ROM), etc.; or it can be various terminals that include one or any combination of the above-mentioned memories, such as mobile phones, computers, tablet devices, personal digital assistants, etc.

[0066] It should be noted that the above description is merely illustrative and not intended to limit the invention. In other embodiments of the invention, the method may have more, fewer, or different steps, and the order, inclusion, and functional relationships between the steps may differ from those described and illustrated. For example, multiple steps may typically be combined into a single step, or a single step may be split into multiple steps. For those skilled in the art, variations in the order of the steps are also within the scope of protection of this invention without inventive effort.

[0067] The technical solution of the present invention, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor or microcontroller to execute all or part of the steps of the methods described in the various embodiments of the present invention.

[0068] Those skilled in the art will understand that all or part of the steps of the above-described method embodiments can be implemented by hardware associated with program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments.

[0069] While the present invention has been disclosed above with reference to preferred embodiments, it is not limited thereto. Any modifications and alterations made by those skilled in the art without departing from the spirit and scope of the invention should be included within the scope of protection of the invention. Therefore, the scope of protection of the invention should be determined by the scope defined in the claims.

Claims

1. A vehicle control method based on a low-frequency antenna, characterized in that, include: Receive active locking commands; When the active locking command is generated because the locking button on the vehicle body is triggered, it is determined whether the number of the first key is greater than the number of the second key. as well as When the number of first keys is greater than the number of second keys, the vehicle is locked. Wherein, the first number of keys refers to the total number of keys in the unlocking area, and the second number of keys refers to the total number of keys in the locking exclusion area; A single low-frequency antenna is installed in the middle of the vehicle. When the single low-frequency antenna is driven, it forms a low-frequency signal field with the signal strength attenuating outward in concentric circles centered on the vehicle. A locking exclusion area and an unlocking area are divided from the low-frequency signal field. The locking exclusion area covers the front and rear seat areas inside the vehicle, and the unlocking area includes and is larger than the locking exclusion area and extends to a predetermined range around the vehicle body.

2. The vehicle control method based on a low-frequency antenna as described in claim 1, characterized in that, The method further includes: When starting the vehicle, search the authentication region; and If the key is found within the authentication area, the vehicle can be started. The authentication area is also divided from the low-frequency signal field, and the authentication area includes and is larger than the locking exclusion area and extends to the surrounding area of ​​the vehicle body, while being smaller than the unlocking area.

3. The vehicle control method based on a low-frequency antenna as described in claim 2, characterized in that, The unlock area, authentication area, and locking exclusion area are all elliptical.

4. The vehicle control method based on a low-frequency antenna as described in claim 2, characterized in that, The boundaries of the unlocking zone, authentication zone, and locking exclusion zone are set using RSSI thresholds; when searching for a key, the area where the key is located is determined by the RSSI value returned by the key.

5. The vehicle control method based on a low-frequency antenna as described in claim 1, characterized in that, After locking the vehicle, the key in the lock exclusion area is further disabled.

6. The vehicle control method based on a low-frequency antenna as described in claim 1, characterized in that, The method further includes: When the active locking command is generated because the locking key on the key is triggered, the locking operation is performed; and Determine if the number of third keys is greater than the number of second keys; When the number of third keys is greater than the number of second keys, the keys in the locking exclusion area are disabled; wherein, the number of third keys refers to the total number of stored paired keys.

7. A vehicle control system based on a low-frequency antenna, characterized in that, include: A single low-frequency antenna is located in the middle of the vehicle. When driven, it forms a low-frequency signal field with the signal strength attenuating outward in concentric circles centered on the vehicle. From the low-frequency signal field, a locking exclusion area and an unlocking area are divided with the single low-frequency antenna as the center. The locking exclusion area covers the front and rear seat areas inside the vehicle, and the unlocking area includes and is larger than the locking exclusion area and extends to a preset distance around the vehicle body. as well as The processor is used to receive active locking commands and control the vehicle to lock when the number of first keys is greater than the number of second keys. Wherein, when the active locking command is generated by the locking button on the vehicle body being triggered, the first key quantity refers to the total number of keys in the unlocking area, and the second key quantity refers to the total number of keys in the locking exclusion area.

8. A computer device / equipment / system, comprising a memory, a processor, and a computer program stored in the memory, characterized in that, The processor executes the computer program to implement the steps of the method according to any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program / instructions stored thereon, characterized in that, When the computer program / instructions are executed by the processor, they implement the steps of the method described in any one of claims 1 to 6.

10. A computer program product comprising a computer program / instructions, characterized in that, When the computer program / instructions are executed by the processor, they implement the steps of the method described in any one of claims 1 to 6.

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