Method and system for measuring distance between driver and vehicle, and remote control parking control method and system

Abstract

The invention provides a method and system for measuring the distance between a driver and a vehicle and a remote control parking control method and system. The method for measuring the distance between the driver and the vehicle comprises the following steps of: transmitting wireless signals to the periphery of the vehicle through a plurality of signal transmitting devices to search a vehicle key; the vehicle key returns the wireless signal after receiving the wireless signal; receiving a wireless signal returned by the vehicle key through a signal receiving device; the distance between the vehicle key and each signal transmitting device is calculated according to the intensity of the wireless signals transmitted by the signal transmitting devices and the intensity of the wireless signals received by the signal receiving device; and determining the distance from the driver to the vehicle based on the distance from the vehicle key to each signal transmitting device. According to the invention, the safety redundancy of remote control parking can be obviously improved, the distance measurement accuracy and reliability are high, and the research and development and production cost is low.

Description

Technical Field

[0001] This invention relates to the field of driver assistance technology, and in particular to a method and system for measuring the distance between the driver and the vehicle, and a remote parking control method and system. Background Technology

[0002] With the booming development of the intelligent connected vehicle industry, Level 2 combined driving assistance functions have rapidly become popular due to their innovation and practicality, but the increasing complexity of these functions has also brought about a series of safety challenges.

[0003] As a typical function of a Level 2 integrated driving assistance system, remote parking combines cutting-edge technologies such as onboard sensor perception, intelligent decision-making and control, and collaborative interaction between the vehicle and mobile devices. This function uses ultrasonic sensors to scan the surrounding environment in real time and accurately identify available parking spaces. After the driver selects a parking space and activates the function, the vehicle can be parked autonomously from outside the car via a mobile app, significantly improving parking convenience and driving experience.

[0004] However, safety and controllability remain the core considerations for remote parking functions. Referring to European standard UNR79 and extensive real-world test data, the vehicle's safety status during remote parking is closely related to the driver's distance from the vehicle. Studies show that when the distance between the driver and the vehicle exceeds 6 meters, the difficulty in real-time perception of the vehicle's operating status and changes in the surrounding environment greatly increases the risk of collisions, scrapes, and other safety accidents. Therefore, strictly limiting the vehicle's operating range to within the driver's field of vision and ensuring that the distance to the vehicle remains within a safe threshold has become a crucial prerequisite for ensuring the safety of remote parking.

[0005] Current market conditions show that most mainstream remote parking functions rely on single communication technologies such as Bluetooth or LTE data networks to control the vehicle, and generally lack safe distance monitoring and restriction mechanisms. Summary of the Invention

[0006] The purpose of this invention is to provide a method and system for measuring the distance between the driver and the vehicle, and a method and system for controlling remote parking, in order to solve the problem that the long distance between the driver and the vehicle in L2-level remote parking functions can easily lead to safety accidents. This invention can significantly improve the safety redundancy of remote parking, and has high accuracy and reliability in distance measurement, while also having low research and development and production costs.

[0007] This invention proposes a method for measuring the distance between a driver and a vehicle, comprising the following steps:

[0008] The vehicle key can be located by transmitting wireless signals around the vehicle using multiple signal transmitters.

[0009] The vehicle key sends back the wireless signal after receiving it.

[0010] Receive the wireless signal transmitted back by the vehicle key through the signal receiving device;

[0011] The distance from the vehicle key to each signal transmitter is calculated based on the strength of the wireless signal emitted by the signal transmitter and the strength of the wireless signal received by the signal receiver.

[0012] The distance between the driver and the vehicle is determined based on the distance from the vehicle key to each signal transmitter.

[0013] In one embodiment, the signal transmitting device is a low-frequency antenna, and the wireless signal is an electromagnetic wave signal.

[0014] In one embodiment, calculating the distance from the vehicle key to each signal transmitter based on the wireless signal strength emitted by the signal transmitter and received by the signal receiver specifically involves:

[0015] The distance from the vehicle key to each signal transmitter is calculated using the RSSI signal attenuation ranging method, based on the strength of the wireless signal transmitted by the signal transmitter and the strength of the wireless signal received by the signal receiver.

[0016] In one embodiment, the formula for calculating the distance from the vehicle key to each signal transmitter based on the wireless signal strength transmitted by the signal transmitter and the wireless signal strength received by the signal receiver using the RSSI signal attenuation ranging method is as follows:

[0017] Where L is the distance from the vehicle key to the signal transmitter;

[0018] C is an environmental constant, which is obtained by parameter calibration based on the actual vehicle and environmental conditions;

[0019] n is the attenuation factor, which is assigned a value according to the scenario;

[0020] Pt is the wireless signal strength value transmitted by the signal transmitting device, and Pr is the wireless signal strength value received by the signal receiving device.

[0021] In one embodiment, the driver's distance from the vehicle is determined based on the distance from the vehicle key to each signal transmitter, specifically:

[0022] The vertical distance between the driver and the vehicle body is calculated using triangulation based on the distance from the vehicle key to each signal transmitter, and this distance is taken as the distance between the driver and the vehicle.

[0023] In one embodiment, the formula for calculating the vertical distance D between the driver and the vehicle body based on the distances from the vehicle key to the two signal transmitters using triangulation is as follows:

[0024]

[0025] in, L1 and L2 are the distances from the vehicle key to the two signal transmitters, respectively, and L3 is the distance between the two signal transmitters.

[0026] The present invention also proposes a driver distance measurement system for implementing the driver distance measurement method described above, comprising:

[0027] Multiple signal transmitters are installed on the vehicle body to emit wireless signals to locate the vehicle key.

[0028] The vehicle key receives and transmits wireless signals from the signal transmitter.

[0029] A signal receiving device is installed on the vehicle body to receive the wireless signal transmitted back by the vehicle key.

[0030] The distance calculation module calculates the distance from the vehicle key to each signal transmitter based on the wireless signal strength emitted by the signal transmitter and received by the signal receiver, and determines the distance of the driver from the vehicle based on the distance from the vehicle key to each signal transmitter.

[0031] In one embodiment, the signal transmitting device is a low-frequency antenna, and the wireless signal is an electromagnetic wave signal.

[0032] The present invention also proposes a remote parking control method, comprising the following steps:

[0033] After the driver initiates remote parking, the distance between the driver and the vehicle is periodically monitored using the driver-vehicle distance measurement method described above;

[0034] The remote parking system operates based on the distance between the driver and the vehicle. When the distance exceeds a set threshold, the remote parking system stops.

[0035] This invention also proposes a remote-controlled parking control system, comprising:

[0036] The driver distance measurement system described above is used to monitor the driver's distance from the vehicle in real time;

[0037] The parking controller connects to the driver's distance-to-vehicle measurement system and controls the operation of remote parking based on the driver's distance from the vehicle. When the distance exceeds a set threshold, remote parking stops.

[0038] Compared with the prior art, the beneficial effects of the driver's distance measurement method and system, and the remote parking control method and system of the present invention are as follows:

[0039] 1) This invention constructs an intelligent and dynamic safety monitoring mechanism to achieve remote parking safety distance monitoring at low cost, providing a brand-new safety technology solution for remote parking function, effectively filling the gap in the field of safety distance monitoring in existing remote parking technology, significantly improving the safety redundancy of remote parking, providing an innovative technical paradigm that can be referenced for the safety design of assisted driving systems, possessing high engineering application value and industry demonstration significance, and providing a solution for improving the safety and reliability of assisted driving.

[0040] 2) This invention improves the ranging algorithm by combining the conventional single RSSI signal attenuation ranging method with triangulation. It uses information such as the transmission and reception strength of multiple low-frequency antennas and abstracts environmental influences into environmental parameters to simplify model calculations. This enables the calculation of the distance between the vehicle key and the vehicle and the driver. Compared with a single ranging method, it significantly improves the accuracy and reliability of ranging and optimizes the ranging precision.

[0041] 3) This invention introduces low-frequency antenna communication for distance monitoring in remote parking, establishing an efficient data transmission and functional linkage mechanism between the body controller, gateway controller, and parking controller. The distance information is used as the boundary limit for the operation of the parking function, with a 6-meter safety threshold set. When the distance exceeds the range, parking is automatically paused and the driver is alerted, forming a complete safety protection closed loop. The newly added distance monitoring mechanism and the redundant design of the dual communication system greatly enhance the safety and controllability of remote parking.

[0042] 4) This invention, through in-depth utilization of hardware resources and innovative design of software algorithms, integrates existing components such as vehicle keys, low-frequency signal transmitting antennas, and vehicle body controllers to construct a vehicle distance monitoring system. With only a slight increase in hardware costs, it achieves functional expansion, reduces R&D and production costs, and completes a significant upgrade to the safety protection system for remote parking functions. This invention not only significantly improves the safety redundancy in remote parking scenarios but also provides a new technical paradigm for the safety design of driver assistance systems, possessing extremely high engineering application value and industry demonstration significance. Attached Figure Description

[0043] Figure 1 This is a flowchart illustrating a method for measuring the distance between a driver and a vehicle according to an embodiment of the present invention.

[0044] Figure 2 This is a schematic diagram illustrating the distance measurement principle of the triangulation method according to an embodiment of the present invention;

[0045] Figure 3a This is a reference design drawing of a first embodiment of the low-frequency antenna of the present invention arranged in a vehicle body;

[0046] Figure 3bThis is a reference design drawing of a second embodiment of the low-frequency antenna of the present invention arranged in a vehicle body;

[0047] Figure 4 This is a diagram showing the relevant parts and system topology of a remote parking function according to an embodiment of the present invention;

[0048] Figure 5 This is an exploded view of the functional modules of a remote parking function according to an embodiment of the present invention;

[0049] Figure 6 This is a schematic diagram of the workflow for monitoring the distance between the driver and the vehicle in the remote parking function of an embodiment of the present invention. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of this invention more readily understood, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that while many specific details are set forth in the following description to provide a thorough understanding of the invention, the invention can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the invention; therefore, the invention is not limited to the specific embodiments disclosed below.

[0051] Secondly, the phrase "an embodiment" or "a particular embodiment" in this application refers to a specific feature, structure, or characteristic that can be included in at least one implementation of the present invention. The phrases "in one embodiment" and "a particular embodiment" appearing in different places in this specification do not all refer to the same embodiment, nor are they embodiments that are mutually exclusive, either alone or selectively, with other embodiments. The terms "comprising" or "including" indicate the presence of the claimed feature but do not exclude the presence of one or more other features. The term "and / or" as used in this application includes any and all combinations of one or more of the related listed items.

[0052] This invention proposes a method for measuring the distance between the driver and the vehicle, see [link to relevant documentation]. Figure 1 It includes the following steps:

[0053] Step S1: Use multiple (i.e., two or more) signal transmitters to send wireless signals around the vehicle to locate the vehicle key;

[0054] Step S2: The vehicle key receives the wireless signal and sends it back.

[0055] Step S3: Receive the wireless signal transmitted back by the vehicle key through the signal receiving device;

[0056] Step S4: Calculate the distance from the vehicle key to each signal transmitter based on the wireless signal strength emitted by the signal transmitter and the wireless signal strength received by the signal receiver.

[0057] Step S5: Determine the distance between the driver and the vehicle based on the distance from the vehicle key to each signal transmitter.

[0058] It should be noted that the signal transmitting device and the signal receiving device can be two independent devices, or they can be the same device that simultaneously transmits and receives signals.

[0059] In one embodiment of the present invention, each set of signal transmitting and receiving devices is a low-frequency antenna, and the wireless signal is an electromagnetic wave signal. It should be noted that in the automotive industry, a low-frequency antenna refers to an antenna device operating in the low-frequency band (30kHz-300kHz) for transmitting or receiving low-frequency electromagnetic waves; this is a common term in the automotive industry.

[0060] Step S4 of one embodiment of the present invention involves calculating the distance from the vehicle key to each signal transmitter based on the wireless signal strength emitted by the signal transmitter and received by the signal receiver. Specifically:

[0061] The RSSI (Received Signal Strength Indication) distance measurement method calculates the distance from a vehicle key to each signal transmitter based on the strength of the wireless signal transmitted and received by the signal receiver. RSSI is a technique that estimates the distance between transmitting and receiving devices by utilizing the attenuation of wireless signal strength during propagation. Its core logic is to deduce the distance between the transmitting and receiving devices by combining the signal strength (RSSI value) measured at the receiver with the initial transmit power and an attenuation model.

[0062] The calculation formula for determining the distance from a vehicle key to each signal transmitter using the RSSI signal attenuation ranging method according to one embodiment of the present invention is as follows:

[0063] Where L is the distance from the vehicle key to the signal transmitter. C is an environmental constant, related to hardware characteristics and environmental benchmarks, used to calibrate hardware differences and initial environmental losses, and is obtained through parameter calibration based on actual vehicle and environmental conditions. Specifically, the C value can be calibrated using the reference distance method: measure the received signal strength Pr0 at a distance L0 = 1m between a single antenna and the vehicle body in the vertical direction, and, given the known antenna transmission strength Pt0, substitute it into the above formula to calculate the environmental C value. n is the attenuation factor, characterizing the rate attenuation of signal strength with distance, and is assigned a value according to the scenario. Specifically, it is assigned based on experience in typical scenarios: free space n = 2, parking lot line-of-sight n = 2.5-3, parking lot non-line-of-sight n = 3-4, and outdoor complex obstruction environment n = 3-5. In this invention, the parking lot line-of-sight distance for vehicle distance monitoring is preferably n = 2.8. Pt is the wireless signal strength value transmitted by the signal transmitter, and Pr is the wireless signal strength value received by the signal receiver; both Pt and Pr are real-time signal measurements.

[0064] The above formula is based on the abstraction of the signal attenuation model of low-frequency antenna signals into a theoretical model consisting of the environmental constant C and the attenuation factor n.

[0065] Step S5 of one embodiment of the present invention, determining the driver's distance from the vehicle based on the distance from the vehicle key to each signal transmitting device, specifically involves:

[0066] The vertical distance between the driver and the vehicle body is calculated using triangulation, based on the distances from the vehicle key to various signal transmitters. This distance is then used as the driver's distance from the vehicle. Triangulation is a positioning technique based on angle measurement. It calculates the target's position coordinates by observing the angles of the target object from two or more known locations. It is widely used in fields such as geographic surveying, maritime navigation, astronomical positioning, and wireless positioning (e.g., 5G / BT AoA).

[0067] The formula for calculating the vertical distance D between the driver and the vehicle body using triangulation based on the distances from the vehicle key to the two signal transmitting devices in one embodiment of the present invention is as follows:

[0068]

[0069] in, L1 and L2 are the distances from the vehicle key to the two signal transmitters, respectively. Their specific values ​​can be determined by substituting the measured signal transmission and reception strength values ​​into the aforementioned formula for calculating the distance from the vehicle key to the signal transmitters. L3 is the distance between the two signal transmitters, determined by their arrangement. S represents the area of ​​the triangle formed by the vehicle key and the two signal transmitters, and s represents the semi-perimeter of the triangle.

[0070] Traditional low-frequency antennas have limited ranging accuracy and are often positioned at the B-pillar. Conventional methods use single-point RSSI signal attenuation for ranging, which only supports keyless entry and is insufficient for remote parking. This invention combines triangulation to improve the ranging algorithm, optimize the system's ranging accuracy, and, moreover, consumes less computational power, making it more practical.

[0071] When determining the vertical distance between the driver and the vehicle body: if the driver is located on one side of the vehicle, it is preferable to calculate the vertical distance between the driver and the side of the vehicle body using the distance between the two signal transmitters on the side of the vehicle and the vehicle key, and use this distance as the driver's distance from the vehicle. See [reference needed]. Figure 2 If the driver is positioned in front of or behind the vehicle, it is preferable to calculate the vertical distance between the driver and the front or rear of the vehicle by measuring the distance between the two signal transmitters at the frontmost or rearmost points on either side of the vehicle and the vehicle key. This distance can then be used as the distance between the driver and the vehicle.

[0072] This invention also proposes a driver distance measurement system for implementing the driver distance measurement method described above. The system includes multiple (i.e., two or more) signal transmitters, a vehicle key, a signal receiver, and a distance calculation module. The signal transmitters are mounted on the vehicle body and emit wireless signals to locate the vehicle key. The vehicle key receives and transmits the wireless signals emitted by the signal transmitters. The signal receivers are mounted on the vehicle body and receive the wireless signals transmitted back by the vehicle key. The distance calculation module calculates the distance from the vehicle key to each signal transmitter based on the strength of the wireless signals emitted and received by the signal receivers, and determines the driver's distance from the vehicle based on these distances.

[0073] It should be noted that the signal transmitting device and the signal receiving device can be two independent devices, or they can be the same device that simultaneously transmits and receives signals.

[0074] In one embodiment of the present invention, each set of signal transmitting and receiving devices is a low-frequency antenna, which is generally driven by the keyless entry system controller, and the wireless signal is an electromagnetic wave signal.

[0075] When placing low-frequency antennas, based on real-vehicle testing and comparison with competitors, it is determined that due to electromagnetic interference and other factors, low-frequency antennas cannot be placed near the engine compartment. They can be placed on wheel arches, door handles, door pillars, or the trunk. Considering the need to satisfy both the vehicle's original keyless entry functions and the remote parking distance monitoring requirements, the preferred placement is on the four wheel arches and / or B-pillars. For shorter vehicles, only one low-frequency antenna needs to be placed at each of the four wheel arches; for longer vehicles, in addition to one low-frequency antenna at each of the four wheel arches, an additional low-frequency antenna needs to be placed at each of the two B-pillars. Preferably, such as... Figure 3a As shown, when the vehicle length is less than or equal to 5m, four low-frequency antenna transmitters are arranged at the four wheel arch positions; Figure 3b As shown, when the vehicle length is greater than 5m, six low-frequency antenna transmitters are deployed, with two additional transmitters located at the B-pillar. This multi-point deployment increases the antenna transmission coverage and also lays the foundation for positioning using triangulation.

[0076] In one embodiment of the present invention, the distance calculation module is integrated into the vehicle's existing body controller, and the distance measurement and monitoring of the driver from the vehicle is realized based on the vehicle's existing hardware by utilizing the vehicle's built-in low-frequency antenna.

[0077] This invention also proposes a remote parking control method, comprising the following steps:

[0078] After the driver initiates remote parking, the distance between the driver and the vehicle is periodically monitored (e.g., at 20ms intervals) using the driver-vehicle distance measurement method described above.

[0079] The remote parking function is controlled based on the distance between the driver and the vehicle. When the distance exceeds a set threshold (e.g., 6 meters), the remote parking function is stopped and the driver is prompted to use the function within a safe distance.

[0080] This invention also proposes a remote parking control system, including the driver distance measurement system and parking controller described above. The driver distance measurement system is used to monitor the driver's distance from the vehicle in real time. The parking controller is connected to the driver distance measurement system and controls the operation of remote parking based on the driver's distance from the vehicle. When the distance exceeds a set threshold (e.g., 6 meters), the remote parking function is stopped and the driver is prompted to use the function within a safe driving distance range.

[0081] like Figure 4 As shown, a typical remote parking function requires hardware such as a parking assist controller, gateway controller, vehicle communication controller, navigation host controller, body controller, keyless entry system controller, drive controller, brake controller, and power steering controller. This hardware implements, for example... Figure 5The invention illustrates basic parking assistance systems including perception, planning and decision-making, control, vehicle-side human-machine interaction, and remote control via mobile phone. This invention deeply reuses existing hardware such as vehicle keys and low-frequency signal transmitting antennas, and adds software features. The keyless entry system controller drives the low-frequency antenna to broadcast signals to locate the vehicle key. The key transmits signal strength and other information back to the vehicle controller. The vehicle controller, using RSSI signal attenuation ranging and triangulation methods, accurately calculates the distance between the key and the vehicle, as well as the driver's distance, based on the transmission and reception strength of multiple low-frequency antennas. This data is then transmitted to the parking controller via the gateway controller. The parking controller makes a judgment based on the driver's distance and controls the remote parking operation, thus achieving distance monitoring.

[0082] Specifically, such as Figure 6 As shown, the keyless entry system controller drives the low-frequency signal transmitting antenna to broadcast low-frequency signals to the vehicle's surroundings periodically at 20ms to locate the vehicle key;

[0083] After receiving a low-frequency signal broadcast, the vehicle key will package information such as the low-frequency signal strength and vehicle identification number and send it to the vehicle body controller via a high-frequency signal.

[0084] Furthermore, the vehicle controller calculates the distance between the vehicle key and the vehicle and the driver based on the transmission and reception strength of the low-frequency signals from multiple low-frequency antennas, using an improved ranging method that combines RSSI signal attenuation ranging with triangulation.

[0085] Finally, the vehicle controller transmits the driver's distance information to the parking controller via the gateway controller. This information serves as a boundary limit for the parking function to operate; remote parking can only be activated within a 6-meter distance. When the distance between the driver and the vehicle exceeds the 6-meter safety threshold, remote parking is automatically paused and the driver is alerted.

[0086] It should be noted that, in this application, unless otherwise explicitly specified and limited, terms such as “connection” and “setting” should be interpreted broadly. For example, “connection” can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0087] The present invention has the following beneficial effects:

[0088] 1) This invention constructs an intelligent and dynamic safety monitoring mechanism to achieve remote parking safety distance monitoring at low cost, providing a brand-new safety technology solution for remote parking function, effectively filling the gap in the field of safety distance monitoring in existing remote parking technology, significantly improving the safety redundancy of remote parking, providing an innovative technical paradigm that can be referenced for the safety design of assisted driving systems, possessing high engineering application value and industry demonstration significance, and providing a solution for improving the safety and reliability of assisted driving.

[0089] 2) This invention improves the ranging algorithm by combining the conventional single RSSI signal attenuation ranging method with triangulation. It uses information such as the transmission and reception strength of multiple low-frequency antennas and abstracts environmental influences into environmental parameters to simplify model calculations. This enables the calculation of the distance between the vehicle key and the vehicle and the driver. Compared with a single ranging method, it significantly improves the accuracy and reliability of ranging and optimizes the ranging precision.

[0090] 3) This invention introduces low-frequency antenna communication for distance monitoring in remote parking, establishing an efficient data transmission and functional linkage mechanism between the body controller, gateway controller, and parking controller. The distance information is used as the boundary limit for the operation of the parking function, with a 6-meter safety threshold set. When the distance exceeds the range, parking is automatically paused and the driver is alerted, forming a complete safety protection closed loop. The newly added distance monitoring mechanism and the redundant design of the dual communication system greatly enhance the safety and controllability of remote parking.

[0091] 4) This invention, through in-depth utilization of hardware resources and innovative design of software algorithms, integrates existing components such as vehicle keys, low-frequency signal transmitting antennas, and vehicle body controllers to construct a vehicle distance monitoring system. With only a slight increase in hardware costs, it achieves functional expansion, reduces R&D and production costs, and completes a significant upgrade to the safety protection system for remote parking functions. This invention not only significantly improves the safety redundancy in remote parking scenarios but also provides a new technical paradigm for the safety design of driver assistance systems, possessing extremely high engineering application value and industry demonstration significance.

[0092] Although the methods described above are illustrated and depicted as a series of actions for the sake of simplicity, it should be understood and appreciated that these methods are not limited by the order of the actions, as some actions may occur in a different order and / or concurrently with other actions from the illustrations and descriptions herein or not illustrated and described herein but which may be understood by those skilled in the art, according to one or more embodiments.

[0093] The constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in size, structure, shape, and proportions, as well as parameter values, installation arrangements, use of materials, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Various corresponding modifications and variations can be made by those skilled in the art according to this invention without departing from the spirit and essence of the invention, but such corresponding modifications and variations should fall within the protection scope of this invention.

Claims

1. A method for measuring the distance between a driver and a vehicle, characterized in that, Includes the following steps: The vehicle key can be located by transmitting wireless signals around the vehicle using multiple signal transmitters. The vehicle key sends back the wireless signal after receiving it. Receive the wireless signal transmitted back by the vehicle key through the signal receiving device; The distance from the vehicle key to each signal transmitter is calculated based on the strength of the wireless signal emitted by the signal transmitter and the strength of the wireless signal received by the signal receiver. The distance between the driver and the vehicle is determined based on the distance from the vehicle key to each signal transmitter.

2. The method for measuring the distance between the driver and the vehicle according to claim 1, characterized in that, The signal transmitting device is a low-frequency antenna, and the wireless signal is an electromagnetic wave signal.

3. The method for measuring the distance between the driver and the vehicle according to claim 1, characterized in that, The calculation of the distance from the vehicle key to each signal transmitter based on the wireless signal strength emitted by the signal transmitter and received by the signal receiver is specifically as follows: The distance from the vehicle key to each signal transmitter is calculated using the RSSI signal attenuation ranging method, based on the strength of the wireless signal transmitted by the signal transmitter and the strength of the wireless signal received by the signal receiver.

4. The method for measuring the distance between the driver and the vehicle according to claim 3, characterized in that, The formula for calculating the distance from the vehicle key to each signal transmitter using the RSSI signal attenuation ranging method, based on the wireless signal strength transmitted by the signal transmitter and received by the signal receiver, is as follows: Where L is the distance from the vehicle key to the signal transmitter; C is an environmental constant, which is obtained by parameter calibration based on the actual vehicle and environmental conditions; n is the attenuation factor, which is assigned a value according to the scenario; Pt is the wireless signal strength value transmitted by the signal transmitting device, and Pr is the wireless signal strength value received by the signal receiving device.

5. The method for measuring the distance between the driver and the vehicle according to claim 1, characterized in that, The distance between the driver and the vehicle is determined based on the distance from the vehicle key to each signal transmitter, specifically: The vertical distance between the driver and the vehicle body is calculated using triangulation based on the distance from the vehicle key to each signal transmitter, and this distance is taken as the distance between the driver and the vehicle.

6. The method for measuring the distance between the driver and the vehicle according to claim 5, characterized in that, The formula for calculating the vertical distance D between the driver and the vehicle body using triangulation, based on the distances from the vehicle key to the two signal transmitters, is as follows: in, L1 and L2 are the distances from the vehicle key to the two signal transmitters, respectively, and L3 is the distance between the two signal transmitters.

7. A driver-vehicle distance measurement system, characterized in that, A method for measuring the distance between a driver and a vehicle as described in any one of claims 1-6, comprising: Multiple signal transmitters are installed on the vehicle body to emit wireless signals to locate the vehicle key. The vehicle key receives and transmits wireless signals from the signal transmitter. A signal receiving device is installed on the vehicle body to receive the wireless signal transmitted back by the vehicle key. The distance calculation module calculates the distance from the vehicle key to each signal transmitter based on the wireless signal strength emitted by the signal transmitter and received by the signal receiver, and determines the distance of the driver from the vehicle based on the distance from the vehicle key to each signal transmitter.

8. The driver-vehicle distance measurement system according to claim 7, characterized in that, The signal transmitting device is a low-frequency antenna, and the wireless signal is an electromagnetic wave signal.

9. A remote-controlled parking control method, characterized in that, Includes the following steps: After the driver initiates remote parking, the distance between the driver and the vehicle is periodically monitored using the driver-vehicle distance measurement method as described in any one of claims 1-6; The remote parking system operates based on the distance between the driver and the vehicle. When the distance exceeds a set threshold, the remote parking system stops.

10. A remote-controlled parking control system, characterized in that, include: The driver distance measurement system as described in claim 7 or 8 is used to monitor the driver's distance from the vehicle in real time. The parking controller connects to the driver's distance-to-vehicle measurement system and controls the operation of remote parking based on the driver's distance from the vehicle. When the distance exceeds a set threshold, remote parking stops.

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