Vehicle keyless unlocking method and system, vehicle and storage medium

Abstract

The invention relates to the technical field of vehicles, in particular to a vehicle keyless unlocking method and system, a vehicle and a storage medium, and the method comprises the following steps: obtaining a target area where a vehicle key works, dividing the target area into a plurality of target sub-areas, and obtaining division thresholds of the plurality of target sub-areas; acquiring a radio frequency signal fed back by the vehicle key, identifying a target field intensity value, fed back at the current position, of the low-frequency antenna, and determining the current position of the vehicle key according to the target field intensity value and the division threshold value; and determining a target vehicle control instruction according to the current position of the vehicle key, and controlling the vehicle to execute an action corresponding to the vehicle empty instruction. Therefore, the problems that in the related technology, the variety of keys is few, portability and intelligence are poor, and due to the fact that an alarm system is imperfect, a vehicle cannot be started, and financial losses are caused are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a vehicle keyless unlocking method and system, a vehicle and a storage medium. BACKGROUND

[0002] With the rapid development of automobile intelligence and the continuous improvement of people's living standards, consumers' demand for automobile functions in terms of intelligence, convenience and safety is increasing. Users expect to achieve a non-sensing interaction experience of "automatic unlocking when approaching and automatic locking when moving away" to reduce operation steps, improve use convenience, and pursue a higher security level of protection to reduce the risk of vehicle theft and the possibility of using illegal keys. Under this background, high-end vehicles have introduced keyless entry and start systems to enhance the sense of technology and luxury of vehicles.

[0003] Compared with traditional mechanical keys, existing remote keys have realized the operation of not needing to be inserted into the lock cylinder, but still need the user to manually press the key to trigger the unlocking or locking function, which cannot truly realize completely non-sensing intelligent interaction, and has problems such as complicated operation and easy to cause lock cylinder wear. To improve user experience, current technologies generally use the method of identifying the key identity and combining position sensing to realize functions such as automatic unlocking when the user carrying a legal key approaches the vehicle and automatic locking when moving away, which significantly improves the intelligence level of the vehicle.

[0004] However, the existing keyless system still has many technical limitations: first, due to the dependence on low-frequency and high-frequency antennas for key positioning, the key positioning accuracy is insufficient, which is easy to cause positioning deviation, resulting in false unlocking or failure to respond in time, affecting user experience; second, inaccurate positioning may be maliciously used, increasing the risk of attack, making illegal devices simulate legal key signals to enter the vehicle, seriously weakening the system security and bringing the risk of vehicle theft and property loss; third, the key type supported by the system is relatively single, which limits the flexibility and convenience of vehicle control; in addition, the alarm prompt mechanism of the existing system is not perfect, which may lead to the loss of the key and the subsequent failure to start the vehicle normally, affecting normal use. SUMMARY

[0005] The present application provides a vehicle keyless unlocking method, system, vehicle and storage medium to solve the problems of related technologies such as few key types, poor portability and intelligence, and imperfect alarm system leading to vehicle failure to start and financial loss.

[0006] The first aspect of this application provides a method for unlocking a vehicle without a key, comprising the following steps: obtaining the target area where the vehicle key is working, dividing the target area into multiple target sub-regions, and obtaining the division threshold of the multiple target sub-regions; obtaining the radio frequency signal fed back by the vehicle key, identifying the target field strength value detected by the vehicle key at the current position, and determining the current position of the vehicle key based on the target field strength value and the division threshold; determining the target vehicle control command based on the current position of the vehicle key, and controlling the vehicle to execute the action corresponding to the corresponding vehicle control command.

[0007] Optionally, the target area can be divided into multiple target sub-regions, including: dividing multiple concentric circles with the vehicle as the center and according to the target radius; dividing multiple concentric circles with the target central angle; and dividing multiple equally spaced distances with the vehicle length and width as the baseline and according to the target width. Multiple target sub-regions are obtained through the above division.

[0008] Optionally, obtaining the segmentation threshold of multiple target sub-regions includes: obtaining the field strength value at the intersection of multiple target sub-regions, converting the field strength value into a voltage value, calculating the intensity indication value of the received signal based on the voltage value, and using the intensity indication value of the received signal at the intersection of multiple target sub-regions as the segmentation threshold of multiple target sub-regions.

[0009] Optionally, the radio frequency signal carries at least one of the target field strength value, power information, and identity information of the low-frequency antenna detected by the vehicle key at the current location.

[0010] Optionally, the target vehicle control command includes any one of the following: wake-up command, light-on command, automatic unlock command, and sleep command.

[0011] Optionally, before determining the current location of the vehicle key based on the target field strength value and the division threshold, the method further includes: acquiring the radio frequency signal sent by the vehicle key and identifying the identity information of the vehicle key; verifying the identity information of the vehicle key; if the verification is successful, determining the current location of the vehicle key based on the target field strength value and the division threshold; if the verification fails, ignoring the radio frequency signal sent by the vehicle key.

[0012] Optionally, after determining the current location of the vehicle key based on the target field strength value and the division threshold, the method further includes: acquiring vehicle status, door status, and the current location and battery level information of the vehicle key; if the battery level of the vehicle key is determined to be less than the battery level threshold based on the battery level information, generating a first alarm signal; if the current location of the vehicle key is outside the vehicle and the vehicle status is in the ignition state, generating a second alarm signal; if the current location of the vehicle key is inside the vehicle and the door status is in the closed state, automatically unlocking the vehicle and generating a third alarm signal; and using at least one of the first, second, and third alarm signals to control the vehicle to perform an alarm action.

[0013] A second aspect of this application provides a vehicle key positioning system, comprising: a plurality of low-frequency antennas arranged at a plurality of target locations on a vehicle, the target locations including at least one of a target location at the front of the vehicle, a target location at the rear of the vehicle, a target location between the driver and passenger seats, and a target location at the rear door of the vehicle; a vehicle key that feeds back radio frequency signals to the vehicle, the vehicle key having a high-frequency antenna that can generate mutual inductance current with the low-frequency antennas to provide power to the vehicle key and drive the vehicle key to send a received signal strength indication value to the vehicle.

[0014] A third aspect of this application provides a vehicle including the vehicle key locating system of the second aspect.

[0015] A fourth aspect of this application provides a computer-readable storage medium having a computer program or instructions stored thereon, which, when executed, implement the keyless vehicle unlocking method of the first aspect.

[0016] Therefore, this application has the following beneficial effects: This application embodiment can acquire the target area where the vehicle key operates, divide the target area into multiple target sub-regions, and acquire the division thresholds for multiple target sub-regions; acquire the radio frequency signal fed back by the vehicle key, identify the target field strength value of the low-frequency antenna fed back at the current location, and determine the current location of the vehicle key based on the target field strength value and the division thresholds; determine the target vehicle control command based on the current location of the vehicle key, and control the vehicle to execute the corresponding vehicle-to-air command actions. Through two-way dynamic encryption authentication, signal replay attacks are prevented. Coupled with a unique alarm function, it helps users better understand the current vehicle status and key loss status. At the same time, the division of target areas greatly improves user convenience; each time you get in the car, you don't need to manually search for the key; you can directly start the car by identifying the key's location. Therefore, it solves the problems of limited key types, poor portability and intelligence, and inadequate alarm systems in related technologies, which lead to vehicle starting failures and financial losses.

[0017] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a flowchart of a vehicle keyless unlocking method according to an embodiment of this application; Figure 2 This is a schematic diagram of a method for contactless entry and startup using an identification key according to an embodiment of this application.

[0019] Figure 3 This is a schematic diagram of an in-vehicle low-frequency antenna arrangement according to an embodiment of this application; Figure 4 This is a schematic diagram of the target sub-region division according to an embodiment of this application; Figure 5 This is a schematic diagram of an alarm type provided according to an embodiment of this application; Figure 6 This is a flowchart of an alarm process according to an embodiment of this application; Figure 7 This is a schematic diagram of a vehicle key positioning system provided according to an embodiment of this application. Detailed Implementation

[0020] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0021] The following description, with reference to the accompanying drawings, outlines a vehicle keyless unlocking method, system, vehicle, and storage medium according to embodiments of this application. Addressing the problems mentioned in the background art, such as the limited types of keys, poor portability and intelligence, and the inadequacy of alarm systems leading to vehicle inability to start and financial losses, this application provides a vehicle keyless unlocking method. In this method, the target area where the vehicle key operates can be obtained, the target area can be divided into multiple target sub-areas, and the division thresholds for these sub-areas can be obtained. The radio frequency signal fed back by the vehicle key can be obtained, and the target field strength value of the low-frequency antenna fed back at the current location can be identified. The current position of the vehicle key can be determined based on the target field strength value and the division thresholds. Based on the current position of the vehicle key, a target vehicle control command can be determined, and the vehicle can be controlled to execute the corresponding vehicle-to-air command action. This solves the problems of the limited types of keys, poor portability and intelligence, and the inadequacy of alarm systems leading to vehicle inability to start and financial losses.

[0022] Specifically, Figure 1 This is a flowchart illustrating a keyless vehicle unlocking method provided in an embodiment of this application.

[0023] like Figure 1 As shown, the keyless unlocking method for this vehicle includes the following steps: In step S101, the target area for the vehicle key to operate is obtained, the target area is divided into multiple target sub-regions, and the division thresholds for the multiple target sub-regions are obtained.

[0024] The target area for the vehicle key is a circular area centered on the vehicle, which serves as the effective sensing range for the keyless entry function. The radius of the area is set according to actual needs and is not specifically limited here.

[0025] It is understood that the embodiments of this application first determine the working area where the vehicle key can be effectively identified. This area forms a circular sensing range centered on the vehicle, and its radius is flexibly set according to the actual usage scenario and security requirements. Subsequently, this circular area is further divided into multiple target sub-areas, each representing the user at a different distance or orientation level. By preset the boundary parameters between each sub-area, i.e., the division threshold, the location level of the key can be determined more accurately, thereby realizing hierarchical response control and providing basic support for subsequent accurate unlocking.

[0026] In this embodiment of the application, the target area is divided into multiple target sub-regions, including: dividing multiple concentric circles according to the target radius with the vehicle as the center, dividing multiple concentric circles according to the target central angle, and dividing multiple equally spaced distances according to the target width with the vehicle length and width as the baseline, thereby obtaining multiple target sub-regions.

[0027] The target radius is smaller than the radius of the target area. The target radius, target central angle, and target width are all set according to actual needs and are not specifically limited here.

[0028] It is understood that the embodiments of this application divide the target area into multiple target sub-regions. The specific process is as follows: taking the vehicle as the center, multiple concentric circles are set according to different target radii to form an annular area from the inside out, which is used to distinguish the distance levels between the user and the vehicle; secondly, based on the concentric circles, the space is divided into multiple sector areas according to the preset central angle to identify the location of the key; in addition, the actual length and width of the vehicle can be combined, and multiple strip-shaped areas can be divided at equal intervals with the vehicle length as the baseline to distinguish whether the key is in the front, middle, or rear of the vehicle. Specifically, it can detect, for example, that the key is inside the vehicle, including the passenger compartment and trunk, or that the key is outside the vehicle, near the left / right door handle or tailgate; through the combined application of the above concentric circles, sector angles, and equidistant strip division methods, the entire target area is finally subdivided into multiple target sub-regions, providing a spatial basis for high-precision positioning and intelligent vehicle control decisions.

[0029] In this embodiment of the application, obtaining the segmentation threshold of multiple target sub-regions includes: obtaining the field strength value at the intersection of multiple target sub-regions, converting the field strength value into a voltage value, calculating the intensity indication value of the received signal based on the voltage value, and using the intensity indication value of the received signal at the intersection of multiple target sub-regions as the segmentation threshold of multiple target sub-regions.

[0030] Among them, the field strength value at the intersection point refers to the electric field strength of the low-frequency signal emitted by the vehicle's low-frequency antenna at the intersection of the boundaries of multiple target sub-regions (such as the intersection of a concentric circle boundary and a sector boundary); the Received Signal Strength Indicator (RSSI) is a quantitative indicator representing the power level of the received wireless signal, usually measured in dBm (decibels per milliwatt). It is a digital value obtained from the voltage value after amplification, filtering, analog-to-digital conversion, and algorithm processing, and is used to evaluate the signal strength; the division threshold is a reference value used to define the boundaries between different target sub-regions. In this embodiment, the received signal strength indicator measured at the intersection point of each sub-region is used as the boundary judgment standard. The specific sub-region where the key is located is determined by comparing the received signal strength indicator detected by the current key with these thresholds.

[0031] It is understood that, in order to determine the division boundaries between each target sub-region, the embodiments of this application first measure the field strength values ​​at the intersection of the boundaries of multiple target sub-regions, then convert the field strength values ​​into voltage signals that can be recognized by the circuit; then further calculate the voltage values ​​into standardized received signal strength indication values; finally, use the received signal strength indication values ​​corresponding to these intersection points as the division threshold between adjacent sub-regions. When the received signal strength indication value returned by the vehicle key is within a certain threshold range, it can be accurately determined which sub-region it is in, thereby realizing high-precision positioning and partition control based on spatial grid.

[0032] In step S102, the radio frequency signal fed back by the vehicle key is acquired, the target field strength value detected by the vehicle key at the current position is identified, and the current position of the vehicle key is determined based on the target field strength value and the division threshold.

[0033] The vehicle acquires the radio frequency signal fed back by the vehicle key through multiple low-frequency antennas arranged inside the vehicle. The current position of the vehicle key is determined based on the target field strength value and the division threshold. That is, each low-frequency antenna converts the received target field strength value into a target voltage value, calculates the target received signal strength indication value based on the target voltage value, compares the target received signal strength indication value with each division threshold, and when the received signal strength indication value is within a certain threshold range, it can be accurately determined which sub-region it is in, thereby determining the current position of the vehicle key.

[0034] It is understood that after the vehicle key enters the target area in this embodiment of the application, it returns a radio frequency signal to the vehicle. The vehicle identifies the target field strength value sensed by the vehicle key at the current position based on the radio frequency signal, and then converts the field strength value into the corresponding target voltage value. The target received signal strength indication value is further calculated. By comparing the target received signal strength indication value with the pre-calibrated threshold values ​​for dividing the boundaries of each target sub-region, the threshold range to which it belongs is determined, thereby accurately locating the spatial sub-region where the key is currently located, and realizing accurate identification and positioning of the vehicle key relative to the vehicle body.

[0035] In this embodiment, the radio frequency signal carries at least one of the target field strength value, power information, and identity information detected by the vehicle key at the current location.

[0036] Among them, the battery information refers to the remaining battery status inside the smart key. This information is uploaded to the vehicle system via radio frequency signals, reminding the user to replace or charge the battery in time, preventing the vehicle from being unable to unlock or start due to a dead key. The identity information refers to the unique encrypted identification code built into the vehicle key, used by the vehicle to verify the key's legitimacy, preventing unauthorized devices from impersonating the key and ensuring the security of the keyless system.

[0037] It is understood that the radio frequency signal in the embodiments of this application includes at least one or more of the following: the target field strength value detected by the key at the current location, the battery information of the vehicle key, and identity information for identity authentication. The target field strength value is used to locate the distance of the key, the battery information is used to monitor the working status of the key, and the identity information is used to ensure communication security. The three together support the keyless system to achieve accurate positioning, reliable interaction, and high-security intelligent vehicle control functions.

[0038] In step S103, the target vehicle control command is determined based on the current location of the vehicle key, and the vehicle is controlled to execute the action corresponding to the vehicle control command.

[0039] It is understood that the embodiments of this application generate corresponding target vehicle control commands based on the current location of the identified vehicle key; for example, issuing an unlock command when the key enters a nearby sub-area, thereby achieving a convenient and safe interactive experience such as seamless entry and exit and intelligent wake-up.

[0040] In the embodiments of this application, the target vehicle control command includes any one of the following: wake-up command, light-on command, automatic unlock command, and sleep command.

[0041] It is understood that, based on the current location of the vehicle key, this application embodiment can intelligently determine the user's intent and generate corresponding target vehicle control commands. These commands include, but are not limited to, wake-up commands, light-on commands, automatic unlock commands, and sleep commands. For example, if the target area is set to 4 meters, and the area is divided into rings with a decreasing radius of 1 meter, when the vehicle key is detected entering the target area 4 meters away from the vehicle, a wake-up command is generated and sent, waking up the vehicle network to allow communication between various devices to prepare for the user to get into the vehicle. When the vehicle key is detected entering the target sub-area 3 meters away from the vehicle, a light-on command is generated and sent, allowing the user to locate the vehicle. When the vehicle key is detected entering the target sub-area 2 meters away from the vehicle, an automatic unlock command is generated and sent, enabling the user to find and unlock the vehicle without any notice, improving convenience. Similarly, when the vehicle key is detected moving away from the vehicle, a locking operation is performed first, and then the lights are turned off to enter sleep mode, saving power. Through the precise triggering of the above commands, a safe, convenient, and intelligent human-vehicle interaction experience is achieved.

[0042] In this embodiment of the application, before determining the current location of the vehicle key based on the target field strength value and the division threshold, the method further includes: acquiring the radio frequency signal sent by the vehicle key and identifying the identity information of the vehicle key; verifying the identity information of the vehicle key; if the verification is successful, determining the current location of the vehicle key based on the target field strength value and the division threshold; if the verification fails, ignoring the radio frequency signal sent by the vehicle key.

[0043] Among them, identity verification refers to the process by which the vehicle, after receiving the radio frequency signal from the key, compares it with the internally stored list of legitimate keys or executes an encryption algorithm to determine whether the key is a legitimate device paired with the vehicle. Only keys that pass verification can trigger subsequent positioning and control operations. Ignoring radio frequency signals means that when key identity verification fails, the vehicle will not respond to its signal, will not perform location determination or vehicle control execution, in order to ensure vehicle anti-theft security.

[0044] It is understood that, before determining the current location of the vehicle key based on the target field strength value and the division threshold, this embodiment first acquires the radio frequency signal sent by the vehicle key and parses its identity information from it. Then, it verifies the legality of the identity information to ensure that the key has been paired with the vehicle and is an authorized device. If the verification is successful, it continues to compare the target field strength value with the division threshold to accurately locate the current location of the key. If the verification fails, it determines that the key is an illegal or unauthorized device, directly ignores the radio frequency signal it sends, and does not perform subsequent positioning and vehicle control operations, thereby effectively preventing illegal intrusion and improving the security of the keyless system.

[0045] In this embodiment of the application, after determining the current location of the vehicle key based on the target field strength value and the division threshold, the method further includes: acquiring vehicle status, door status, and the current location and battery level information of the vehicle key; if the battery level of the vehicle key is determined to be less than the battery level threshold based on the battery level information, a first alarm signal is generated; if the current location of the vehicle key is outside the vehicle and the vehicle status is in the start state, a second alarm signal is generated; if the current location of the vehicle key is inside the vehicle and the door status is in the closed state, the vehicle is automatically unlocked and a third alarm signal is generated; and at least one of the first alarm signal, the second alarm signal, and the third alarm signal is used to control the vehicle to perform an alarm action.

[0046] Among them, the door status refers to the open / closed status of all vehicle doors, which is monitored in real time by the body control module through door lock sensors; the battery information refers to the remaining power of the smart key's internal battery, usually expressed in voltage or percentage form; the battery threshold refers to the preset minimum acceptable battery level (e.g., below 10%). When the actual battery level of the key is lower than this value, it prompts that the battery needs to be replaced or charged to prevent the key from malfunctioning. The battery threshold is set according to actual needs and is not specifically limited here; the first alarm signal is an alarm command generated when the key battery is detected to be too low, which can be a reminder on the in-vehicle screen to remind the user to replace the battery in time; the second alarm signal is an alarm signal triggered when the vehicle key is outside the vehicle and the vehicle is in the starting state, which can be a reminder on the in-vehicle screen to indicate that there may be a safety hazard of the key being left outside the vehicle; the third alarm signal is an alarm signal triggered when the key is inside the vehicle and all doors are closed, which can be a horn sound to remind the user that the key has been left inside the vehicle, which may result in the vehicle being unable to lock or start.

[0047] It is understood that, in this embodiment of the application, after determining the current location of the vehicle key based on the target field strength value and the division threshold, the current open / closed state of the car door and the key's battery level information are further obtained. If the key's battery level is determined to be lower than a preset battery threshold, a first alarm signal is generated to remind the user that the key is about to expire. If the key is outside the vehicle and the vehicle is running, it indicates that the key may have been left outside the vehicle, and a second alarm signal is generated to prevent the risk of forgetting or theft. If the key is inside the vehicle and all doors are closed, it is determined that the key has been left inside the vehicle, and an unlocking operation is automatically performed to prevent the user from being locked outside the vehicle. At the same time, a third alarm signal is generated to provide a reminder. Based on one or more of the above three alarm signals, the vehicle is triggered to perform corresponding alarm actions, such as flashing lights, beeping, or remote notification, thereby improving the safety of use and the human-computer interaction experience.

[0048] According to the vehicle key positioning method proposed in this application, the target area where the vehicle key is working can be obtained, the target area can be divided into multiple target sub-areas, and the division threshold of the multiple target sub-areas can be obtained; the radio frequency signal fed back by the vehicle key can be obtained, the target field strength value of the low frequency antenna fed back at the current position can be identified, and the current position of the vehicle key can be determined according to the target field strength value and the division threshold; the target vehicle control command can be determined according to the current position of the vehicle key, and the vehicle can be controlled to execute the corresponding vehicle control command. Through two-way dynamic encryption authentication, signal replay attacks are prevented. With the addition of a unique alarm function, users can better understand the current vehicle status and the key loss status. At the same time, by dividing the target area, the convenience of users is greatly improved. Every time you get in the car, you do not need to manually look for the key. You can directly start the car by identifying the key position.

[0049] The keyless vehicle unlocking method is further described below through a specific embodiment, and the specific process is as follows: Figure 2 As shown.

[0050] 1. Search for the key to obtain the high-frequency signal of the key and calculate the positioning field strength value with the current location.

[0051] according to Figure 3 The red-marked location indicates where a low-frequency antenna is placed inside the vehicle. Multiple low-frequency antennas are used to measure the key signal strength and roughly locate the key's position.

[0052] In addition to sending low-frequency signals to locate the key, the low-frequency antenna inside the car also serves as an anti-theft authentication device. Its function also includes that when the key battery is low, placing the key on the antenna inside the car will cause the coil to generate a mutual inductance current with the high-frequency antenna harness in the key. This small amount of current is enough for the key to send a location signal for positioning and to start the vehicle.

[0053] After dividing the area into zones, place the key in one of the above locations, obtain the field strength value using a tool, convert it into a voltage value, and calculate the RSSI value. Write the corresponding RSSI value for each zone into the system.

[0054] For example, PEPS_KEY_IN indicates that the key is inside the vehicle, including the passenger compartment and trunk; PEPS_KEY_NEAR_FLANT indicates that the key is outside the vehicle, near the left door handle; PEPS_KEY_NEAR_FRANT indicates that the key is outside the vehicle, near the right door handle; PEPS_KEY_NEAR_TRUNKANT indicates that the key is outside the vehicle, near the tailgate; Unknow indicates a location other than those mentioned above.

[0055] 2. Divide the RSSI values ​​of different instruction regions into ranges.

[0056] Determining the RSSI range for each region requires manual parameter calibration. For example, in Environment 1, the area around the vehicle is divided into three concentric circles centered on the vehicle body, creating three regions. Then, eight arc-shaped regions are divided at 45-degree central angles. Finally, eight equal distances are drawn using the vehicle's length and width as baselines, as shown below. Figure 4 After the areas are divided as shown, each intersection point is marked, such as... Figure 4 The numbers 1-10 are marked in the text.

[0057] The key stops at each marked point, and the system queries the field strength value returned by the key. This process is repeated, marking the coordinates and RSSI values ​​of each point at different angles and distances. Finally, the field strength values ​​at each boundary are recorded in detail, and the field strength range of each area is defined and written into the software to determine the key's position. This step requires manual collection of RSSI values ​​at the set points. 3. Recognize key information, arrive at the designated location, and send a signal to control the vehicle.

[0058] After defining the RSSI range based on location, when the key's RSSI falls within a certain range, a corresponding vehicle control command is sent. The system retrieves the key by the user's door opening and closing operation. The key sends back a radio frequency signal containing its location, battery level, and identity information. If the key's location matches the vehicle's RSSI range, the system checks if the battery level is above a set value. If not, a low battery alarm alerts the user. If the battery level is sufficient, the system proceeds to the next step of identity verification and authentication. This authentication primarily aims to prevent theft and improve user security. Successful authentication allows the user to start and drive the vehicle.

[0059] When the key is outside the vehicle, the design automatically unfolds and uses a low-frequency antenna to send a signal to locate the key. Once the key enters a 4m detection range, it activates the vehicle network, allowing communication between various devices to prepare for the user to get in. When the user approaches the vehicle within 3m, a command to unlock and turn on the lights is sent, allowing the user to locate the vehicle. When the user approaches within 2m, a command to automatically unlock the vehicle is sent, enabling the user to find and unlock the vehicle without any interaction, improving convenience. When the user moves away from the vehicle, the system first locks and then turns off the lights to enter sleep mode, saving power.

[0060] This step requires accurate antenna positioning to ensure that the key position does not deviate too much, which highlights the necessity of the previous step of gradually narrowing down the RSSI value range and accurately writing it into the system.

[0061] 4. The vehicle alarm system is activated.

[0062] In addition to allowing users to start and run the vehicle without being notified, this embodiment can also anticipate the risk of lost keys and property loss, thus greatly improving security.

[0063] as follows Figure 5As shown, the alarms in this design are mainly divided into the following seven types, primarily targeting key battery power alarms, alarms for not finding the key upon entering the vehicle, alarms for the vehicle leaving but the key not inside the vehicle, alarms for locking the door and moving away but still being inside the vehicle, and alarms for the vehicle not being in neutral when the power is off. The judgment process is as follows: Figure 6 As shown. These alarms not only remind users of the key's location to prevent loss, but also force certain actions to prevent the vehicle from locking while the key is still inside, creating a dangerous situation. Most alarms serve a warning function, primarily serving as reminders. Therefore, they automatically stop alarming once the key is detected back inside the vehicle or the alarm timeout expires. However, when the key is left inside the vehicle but the lock is attempted, in addition to the warning, an unlocking operation is forced, increasing security.

[0064] The alarm system relies heavily on the operation of the positioning system. Only by accurately determining the location of the key can the corresponding alarm be triggered to prevent property damage.

[0065] Next, the vehicle key positioning system proposed according to the embodiments of this application is described with reference to the accompanying drawings.

[0066] Figure 7 This is a schematic diagram of the vehicle key positioning system according to an embodiment of this application.

[0067] like Figure 7 As shown, the vehicle key positioning system 20 includes: multiple low-frequency antennas 201 and a vehicle key 202.

[0068] Multiple low-frequency antennas 201 are arranged at multiple target locations on the vehicle, including at least one target location at the front of the vehicle, the rear of the vehicle, the target location between the driver and passenger seats, and the target location at the rear door of the vehicle; the vehicle key 202 feeds back radio frequency signals to the vehicle, and the vehicle key 202 is equipped with a high-frequency antenna, which can generate mutual inductance current with the low-frequency antennas 201 to provide power to the vehicle key 202 and drive the vehicle key 202 to send radio frequency signals to the vehicle.

[0069] Among them, the high-frequency antenna refers to the antenna inside the smart key used to send and receive radio frequency signals. When the vehicle key 202 is close to the low-frequency antenna of the vehicle, electromagnetic induction can be generated between the two. The mutual inductance current is the current generated when the high-frequency antenna inside the vehicle key 202 is close to the low-frequency antenna of the vehicle. The alternating magnetic field generated by the low-frequency antenna on the vehicle side will induce a weak current in the coil of the key.

[0070] It is understood that the embodiments of this application include several low-frequency antennas 201 installed in multiple key locations of the vehicle (such as the front, rear, between the driver and passenger seats, and the rear door), and a vehicle key 202 held by the user. The vehicle detects the vehicle key 202 by sending signals through the low-frequency antennas 201. The vehicle key 202 contains a high-frequency antenna. If the vehicle key 202 has insufficient power, it can be brought close to the low-frequency antennas 201 of the vehicle. The magnetic field generated by the low-frequency antennas 201 will induce electromagnetic induction with the high-frequency antenna inside the vehicle key 202, generating a weak mutual inductance current. This part of the electrical energy can temporarily power the vehicle key 202 when it has insufficient power, enabling it to send radio frequency signals containing identity information to the vehicle, thereby allowing the vehicle to recognize the vehicle key 202 and determine its location, and realize functions such as starting.

[0071] According to the vehicle key positioning system proposed in this application, the target area where the vehicle key is working can be obtained, the target area can be divided into multiple target sub-areas, and the division threshold of multiple target sub-areas can be obtained; the radio frequency signal fed back by the vehicle key can be obtained, the target field strength value of the low frequency antenna fed back at the current location can be identified, and the current location of the vehicle key can be determined according to the target field strength value and the division threshold; the target vehicle control command can be determined according to the current location of the vehicle key, and the vehicle can be controlled to execute the corresponding vehicle control command. Through two-way dynamic encryption authentication, signal replay attacks are prevented. With the addition of a unique alarm function, users can better understand the current vehicle status and the key loss status. At the same time, by dividing the target area, the convenience of users is greatly improved. Every time you get in the car, you do not need to manually look for the key. You can directly start the car by identifying the key location.

[0072] It should be noted that the foregoing explanation of the vehicle key positioning method embodiment also applies to the vehicle key positioning system of this embodiment, and will not be repeated here.

[0073] This application also provides a vehicle including the vehicle key positioning system described above.

[0074] This application also provides a computer-readable storage medium storing a computer program or instructions thereon, which, when executed, implements the above-described vehicle keyless unlocking method.

[0075] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0076] Furthermore, 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0077] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or N executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0078] It should be understood that various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any of the following techniques known in the art, or a combination thereof: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (FPGAs), field-programmable gate arrays (FPGAs), etc.

[0079] Those skilled in the art will understand that all or part of the steps of the methods implementing the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

[0080] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A method for unlocking a vehicle without keys, characterized in that, include: The target area for vehicle key operation is obtained, the target area is divided into multiple target sub-regions, and the division threshold of the multiple sub-regions is obtained; The radio frequency signal fed back by the vehicle key is acquired, the target field strength value detected by the vehicle key at the current location is identified, and the current location of the vehicle key is determined based on the target field strength value and the division threshold. The target vehicle control command is determined based on the current location of the vehicle key, and the vehicle is controlled to perform the corresponding action.

2. The vehicle keyless unlocking method according to claim 1, characterized in that, The division of the target region into multiple target sub-regions includes: Using the vehicle as the center, multiple concentric circles are divided according to the target radius. The multiple concentric circles are further divided according to the target central angle. Using the vehicle's length and width as the baseline, multiple equally divided distances are obtained according to the target width. After the above division, multiple target sub-regions are obtained.

3. The vehicle keyless unlocking method according to claim 1, characterized in that, The step of obtaining the segmentation thresholds for the multiple target sub-regions includes: Obtain the field strength value at the intersection of the multiple target sub-regions, convert the field strength value into a voltage value, and calculate the intensity indication value of the received signal based on the voltage value; The received signal strength indication value at the intersection of the multiple target sub-regions is used as the threshold for dividing the multiple target sub-regions.

4. The vehicle keyless unlocking method according to claim 1, characterized in that, The radio frequency signal carries at least one of the target field strength value, power information and identity information detected by the vehicle key at the current location.

5. The vehicle keyless unlocking method according to claim 1, characterized in that, The target vehicle control command includes any one of the following: wake-up command, light-on command, automatic unlock command, and sleep command.

6. The vehicle keyless unlocking method according to claim 1 or 4, characterized in that, Before determining the current location of the vehicle key based on the target field strength value and the division threshold, the method further includes: The radio frequency signal transmitted by the vehicle key is acquired, and the identity information of the vehicle key is identified. The identity information of the vehicle key is verified. If the verification is successful, the current location of the vehicle key is determined based on the target field strength value and the division threshold. If the verification fails, the radio frequency signal sent by the vehicle key is ignored.

7. The vehicle keyless unlocking method according to claim 1, characterized in that, After determining the current location of the vehicle key based on the target field strength value and the division threshold, the method further includes: Obtain the vehicle status, door status, and the current location and battery level of the vehicle key; If the battery level of the vehicle key is determined to be less than the battery threshold based on the battery information, a first alarm signal is generated. If the vehicle key is currently located outside the vehicle and the vehicle is in the started state, a second alarm signal is generated. If the vehicle key is currently inside the vehicle and the doors are closed, the vehicle will be automatically unlocked and a third alarm signal will be generated. The vehicle is controlled to perform an alarm action by using at least one of the first alarm signal, the second alarm signal, and the third alarm signal.

8. A vehicle key positioning system, characterized in that, include: Multiple low-frequency antennas are arranged at multiple target locations on the vehicle, including at least one of the following target locations: a target location at the front of the vehicle, a target location at the rear of the vehicle, a target location between the driver and passenger seats, and a target location at the rear door of the vehicle. The vehicle key feeds back radio frequency signals to the vehicle. The vehicle key is equipped with a high-frequency antenna, which can generate mutual inductance current with the low-frequency antenna to provide power to the vehicle key and drive the vehicle key to send radio frequency signals to the vehicle.

9. A vehicle, characterized in that, Includes the vehicle key locating system as described in claim 8.

10. A computer-readable storage medium having a computer program or instructions stored thereon, characterized in that, When the computer program or instructions are executed, they implement the vehicle keyless unlocking method according to any one of claims 1-7.

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