Vehicle function control method and device based on fingerprint information

Abstract

The invention discloses a vehicle function control method and device based on fingerprint information, and provides a set of algorithm for accurately identifying a position area of a movable vehicle function control device in a vehicle, and through the algorithm, function switching based on the position area of the vehicle function control device is more accurate. A fingerprint identification module is embedded in a vehicle function control device, and a mapping relation is established between fingerprint information and a vehicle control function, so that the corresponding vehicle control function can be quickly matched according to the fingerprint information; through identification of the identity information and the position of the vehicle function control device in the vehicle, the control functions associated with the identified identity and / or the position area can be switched in a self-adaptive mode, control over the vehicle functions is more intelligent, more flexible and more interesting, and the use experience of a user is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle control, and particularly to a vehicle function control method and device based on fingerprint information. Background Art

[0002] Currently, the operation and control of vehicle functions mostly rely on physical buttons, touch screens fixed on the central control panel, doors, etc., or directly through voice control. The layout of physical buttons is fixed, the operation is not flexible enough, and the functions are relatively single, and it is impossible to adaptively switch to the corresponding vehicle control functions according to the different needs of different vehicle owners for vehicle functions or the different needs of the same vehicle owner in different scenarios for vehicle functions. Although the central control touch screen has a high degree of integration, it is easy to distract the driver's attention during driving, posing a safety hazard. Although voice control liberates the hands, the accuracy of voice recognition is affected by factors such as the environment and the recognition accuracy of the voice recognition algorithm, which may cause the voice control of vehicle functions to fail.

[0003] Therefore, there is an expectation in this field for a vehicle function control device with a movable physical form, which allows the vehicle owner or passenger to hold the device and flexibly operate various vehicle control functions, and the device can accurately and quickly switch to the vehicle control functions required by the user in the current scenario and / or the location area where the user is currently in the vehicle according to different user identities.

[0004] However, to achieve the above expectations of those skilled in the art, the following two technical problems need to be solved: 1. How can a movable vehicle function control device adaptively, accurately and quickly realize the different vehicle function control requirements of different users in the current vehicle use scenario; 2. To ensure that a movable vehicle function control device can accurately automatically switch the vehicle control functions to the vehicle control functions required by the location area where the user is currently in the vehicle, it is necessary to accurately identify the location area of the movable vehicle function control device in the vehicle. However, the interior space of the vehicle is narrow and may be blocked by obstacles such as the human body, and conventional positioning methods cannot meet the accuracy requirements for vehicle interior positioning in this application, which is also one of the technical problems that this application needs to overcome. Summary of the Invention

[0005] The present invention aims to accurately and quickly switch to the vehicle control functions required by the user in the current vehicle use scenario and / or the location area where the user is currently in the vehicle according to different user identities, and provides a vehicle function control method and device based on fingerprint information.

[0006] To achieve this purpose, the present invention adopts the following technical solutions: Provide a vehicle function control method based on fingerprint information, including the steps: S1. The movable vehicle function control device identifies the user's identity characteristics; S2. Match the vehicle control function group associated with the identified identity characteristics from the function group library; S3. Switch the currently controllable functions of the vehicle function control device to each vehicle control function under the function group. Preferably, a fingerprint recognition module is integrated on the movable vehicle function control device for recognizing the user's fingerprint information as the user's identity characteristics.

[0007] Preferably, a Bluetooth communication module is integrated on the movable vehicle function control device for establishing a Bluetooth communication connection with the vehicle system, and the interaction information for realizing the controllable function switching in steps S1 - S3 is transmitted through Bluetooth communication.

[0008] Preferably , the method for the function group matching in step S2 is: The vehicle function control device matches the function group associated with the identified identity characteristics from the stored function group library; Or, the vehicle function control device sends the identified identity characteristics to the vehicle system, and the vehicle system matches the function group associated with the received identity characteristics from the function group library and then sends it back to the vehicle function control device.

[0009] Preferably, the user learns each vehicle control function through the learning button set on the movable vehicle function control device, and the learning method is: After the user presses the fingerprint recognition module set on the vehicle function control device with a finger and successfully recognizes the fingerprint characteristics, long - press the fingerprint recognition module downward for a preset duration to enter the vehicle control function learning state, and then the user sets various vehicle control functions according to their own needs. After the setting is completed, press the fingerprint recognition module downward again to reset the fingerprint recognition module to complete this learning; Or, first set various vehicle control functions according to their own needs, and then press the fingerprint recognition module to successfully recognize the fingerprint characteristics and long - press downward for a preset duration to complete this function learning.

[0010] Preferably, the identity characteristics identified by step S1 for the user include a multi - fingerprint operation sequence within a time window, and the operation characteristics in the multi - fingerprint operation sequence include at least one touch fingerprint characteristic and / or at least one button - pressing characteristic associated with the same user.

[0011] Preferably, the method for the function group matching in step S2 is: Taking the recognized touch fingerprint feature of the user as the start instruction for generating the multi-fingerprint operation sequence, forming the recognized operation action features of various types into the multi-fingerprint operation sequence in chronological order, and recording the duration of forming the multi-fingerprint operation sequence as the time window associated with the multi-fingerprint operation sequence; Obtaining the time window threshold range in which the time window falls, and matching each operation sequence template associated with the time window threshold range from the template library; Performing a similarity comparison between the multi-fingerprint operation sequence and each of the matched operation sequence templates, matching the operation sequence template with the maximum similarity, and taking the template function group associated with the matched operation sequence template as the function group of the user's requirement at the current moment.

[0012] Preferably, the identity feature recognized for the user in step S1 includes a fingerprint gesture sequence, and the operation features in the fingerprint gesture sequence include the button operation features of the first user, and / or the gesture trajectory features of the second user or the first user; the button operation features of the first user include touch fingerprint features and / or button pressing features.

[0013] Preferably, the method for matching the function group in step S2 includes the steps: D1, matching the first function group associated with the recognized touch fingerprint feature of the first user and controlling the vehicle-mounted system to execute each vehicle control function under the first function group; D2, monitoring whether the finger of the first user with the touch fingerprint feature keeps pressing down on the fingerprint recognition module of the movable vehicle function control device, If so, starting to monitor whether the gesture trajectory feature is formed within a preset duration and transferring to step D3; If not, prompting the first user to press down the fingerprint recognition module; D3, monitoring whether the gesture trajectory feature is formed within the preset duration, If so, matching the second function group associated with the formed gesture trajectory feature, and the second function group and the first function group have a binding relationship; If not, terminating the matching process of the second function group.

[0014] Preferably, at least one of the function groups matched in step S2 is respectively bound to a corresponding in-vehicle position area. Before executing step S3 after executing step S2, execute the step: L1. Identify the current location area of the movable vehicle function control device in the vehicle, and then match the function group associated with the identified location area from each of the function groups matched in step S2. In step S3, execute each vehicle control function under the function group matched in step L1. The method for identifying the current location area of the vehicle function control device in the vehicle is as follows: Locate the vehicle function control device in the vehicle through UWB, or read the location information of the vehicle function control device by the NFC tags adsorbed in each area of the vehicle, so as to realize the positioning of the device.

[0015] Preferably, locate the device in the vehicle through UWB. Specifically, by reading the location information of the positioning tag carried in the vehicle function control device in the UWB base station array, output the positioning result of the vehicle function control device in the vehicle space, and then match the function group associated with the vehicle location area represented by the positioning result.

[0016] Preferably, read the location information by the adsorbed NFC tags. Specifically: Attach the vehicle function control device integrated with the NFC reading module internally to the NFC electronic tag at the current location in the vehicle. The device reads the unique code of the current NFC electronic tag, and this code corresponds to the preset location where the NFC tag is located, so as to obtain the positioning result of the device in the vehicle, and then match the function group associated with the vehicle location area represented by the positioning result.

[0017] The present invention also provides a vehicle function control device based on fingerprint information, which can implement the vehicle function control method based on fingerprint information, including: A fingerprint recognition module for the touch fingerprint features of the user. A button pressing detection module for detecting the pressing features of the button set in the vehicle function control device pressed by the user. A control module is connected to the fingerprint recognition module and / or the button pressing detection module, and is used for matching the function group currently required by the user from the function group library according to the identified touch fingerprint features and / or button pressing features, or instructing the vehicle machine system to match the function group currently required by the user from the function group library, and the vehicle machine system executes the matched function group.

[0018] The present invention has the following beneficial effects: 1. Provide an algorithm for accurately identifying the location area of the movable vehicle function control device in the vehicle. Through this algorithm, the function switching based on the location area of the vehicle function control device is made more accurate. 2. Embed a fingerprint recognition module in the vehicle function control device. By establishing a mapping relationship between fingerprint information and vehicle control functions, it is possible to quickly match the corresponding vehicle control functions according to the fingerprint information. 3. The movable vehicle function control device communicates with the vehicle-mounted system through Bluetooth communication, enabling the vehicle-mounted system to quickly respond to function switching or function execution instructions of the vehicle function control device. 4. It is possible to preset the same or different vehicle control functions for different fingerprints of different fingers of the same user in the same or different application scenarios or in the same or different vehicle interior areas, greatly enhancing the richness of the controllable functions of the movable vehicle function control device. Moreover, through the identification of identity information and the position of the vehicle function control device in the vehicle, it can adaptively switch to the control functions associated with the identified identity and / or the position area, making the control of vehicle functions more intelligent, flexible, and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] Figure 1 It is a flowchart showing the implementation steps of the vehicle function control method based on fingerprint information provided by an embodiment of the present invention; Figure 2 It is a flowchart showing the implementation of the vehicle function control method based on fingerprint information provided by this embodiment; Figure 3 It is a schematic diagram showing the layout of base station nodes and tag nodes at the edge of the vehicle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The technical solutions of the present invention will be further described below with reference to the drawings and through specific embodiments.

[0022] Among them, the drawings are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and should not be construed as a limitation to this patent; for better illustration of the embodiments of the present invention, some components in the drawings will be omitted, enlarged, or reduced, and do not represent the dimensions of actual products; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0023] In the drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if terms such as "upper", "lower", "left", "right", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and cannot be construed as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0024] In the description of the present invention, unless otherwise clearly specified and limited, if terms such as "connection" are used to indicate the connection relationship between components, this term should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] The main technological innovation points of the vehicle function control method based on fingerprint information provided by the embodiments of the present invention are mainly the following four points: 1. Provide an algorithm for accurately identifying the position area of a movable vehicle function control device in the vehicle. Through this algorithm, the function switching based on the position area of the vehicle function control device is made more accurate; 2. Embed a fingerprint recognition module in the vehicle function control device. By constructing a mapping relationship between fingerprint information and vehicle control functions, it is possible to quickly match the corresponding vehicle control functions according to fingerprint information; 3. The movable vehicle function control device communicates with the vehicle-mounted system through Bluetooth communication, enabling the vehicle-mounted system to quickly respond to the function switching or function execution instructions of the vehicle function control device; 4. It is possible to preset the same or different vehicle control functions for different fingerprints of different fingers of the same user in the same or different application scenarios or in the same or different vehicle areas, greatly improving the richness of the controllable functions of the movable vehicle function control device. And through the identification of identity information and the position of the vehicle function control device in the vehicle, it can adaptively switch to the control functions associated with the identified identity and / or position area, making the control of vehicle functions more intelligent, more flexible, and improving the user experience.

[0026] The following will explain how the above four technological innovation points are specifically implemented in this embodiment one by one.

[0027] To achieve the above-mentioned 2nd - 3rd technological innovation points, the following technical solutions are adopted in this embodiment: Integrate a fingerprint recognition module on the movable vehicle function control device. After the user presses a finger on the fingerprint recognition module, the module will automatically recognize the user's fingerprint information and output the recognition result. Different fingerprint information of the same finger of each user is associated with corresponding vehicle control function groups, or different fingerprint information of different fingers of the same user is associated with corresponding vehicle control function groups. After the vehicle function control module recognizes the user's fingerprint information, it can automatically match the function group corresponding to the recognized fingerprint information according to the pre - constructed association relationship between the fingerprint information and the function group, or send the recognized fingerprint information to the vehicle head unit system, and the vehicle head unit system automatically matches the function group corresponding to the received fingerprint information, and then controls the vehicle function control device to switch the currently executable vehicle control functions to each vehicle control function included in the matched function group.

[0028] Preferably, a communication connection is established between the vehicle function control device and the vehicle head unit system through Bluetooth communication. That is, Bluetooth communication modules are provided in the vehicle function control device and the vehicle head unit system, and the communication connection between the vehicle function control device and the vehicle head unit system is established through Bluetooth communication.

[0029] It should be noted here that the user can learn each vehicle control function through the learning button provided on the movable vehicle function control device. The learning method is as follows: When the user presses the fingerprint recognition module provided on the vehicle function control device to successfully recognize the fingerprint feature and simultaneously long - presses downward for a preset duration, it enters the vehicle control function learning state. Then the user can set various vehicle control functions according to their own needs. After the setting is completed, press the vehicle function control device downward again and reset it, then this learning is completed. Or, various vehicle control functions required by the user can be set first, and then press the fingerprint recognition module provided on the vehicle function control device to successfully recognize the fingerprint feature and simultaneously long - press downward for a preset duration to complete the learning. After completing the function self - definition learning, the vehicle head unit system stores the function group associated with the completed learning of this user in the function group library. When the vehicle function control device switches the vehicle control functions of this user, the user can recognize their own fingerprint through the fingerprint recognition module again, so as to switch back to the vehicle control functions required by themselves.

[0030] In this embodiment, the identity characteristics identified for the user are preferably multi-fingerprint operation characteristics, including at least one touch fingerprint characteristic and / or at least one button pressing characteristic associated with the user. For example, within a certain time window, such as 0.5 s, a certain user first double-clicks the fingerprint recognition module of the movable vehicle function control device with the thumb, and then briefly presses the fingerprint recognition module with the index finger. Then the touch fingerprint characteristics include the thumb fingerprint characteristic and the index finger fingerprint characteristic, and the button pressing characteristics include the double-click pressing characteristic and the short-press pressing characteristic. The formed multi-fingerprint operation sequence can be expressed in chronological order as: thumb fingerprint characteristic - double-click pressing characteristic - index finger fingerprint characteristic - short-press pressing characteristic.

[0031] For the multi-fingerprint operation characteristics, this embodiment also provides another method for matching function groups for the user, specifically: Taking the fingerprint characteristic recognized for the user as the start instruction for generating the multi-fingerprint operation sequence, forming the recognized operation action characteristics of each type into a multi-fingerprint operation sequence in chronological order, and recording the duration of forming the multi-fingerprint operation sequence (such as 0.5 s) as the time window associated with the multi-fingerprint operation sequence; Obtaining the time window threshold range (such as 0.4 - 0.6 s) into which the time window falls, and matching each operation sequence template associated with the time window threshold range from the template library; Performing a similarity comparison between the multi-fingerprint operation sequence and each of the matched operation sequence templates, matching the operation sequence template with the maximum similarity, and taking the template function group associated with the matched operation sequence template as the function group required by the user at the current moment. For example, the multi-fingerprint operation sequence is expressed as: thumb fingerprint characteristic - double-click pressing characteristic - index finger fingerprint characteristic - short-press pressing characteristic, and the matched operation sequence template with the maximum similarity is expressed as: thumb fingerprint characteristic - double-click pressing characteristic - index finger fingerprint characteristic - short-press pressing characteristic, that is, the sorting order of each element in the multi-fingerprint operation sequence is the same as that of the corresponding element of the same type in the operation sequence template in their respective sequences, then it is determined that the similarity of the two sequences is "1", and it is determined to have the maximum similarity. That is: the similarity is the ratio of the number of elements with the same sorting order of type correspondence to the total number of elements.

[0032] In this embodiment, the identity characteristics identified for the user preferably also include a fingerprint gesture sequence. The operation characteristics in the fingerprint gesture sequence include the button operation characteristics of the first user, and / or the gesture trajectory characteristics of the second user or the first user, that is, the button operation and the gesture control can be of the same user or different users. The button operation characteristics of the first user include touch fingerprint characteristics and / or button pressing characteristics.

[0033] The method steps for matching function groups through the fingerprint gesture sequence include: D1, match the first function group associated with the touch fingerprint feature recognized by the first user and control the vehicle-mounted system to execute each vehicle control function under the first function group; for example, when the first user touches the fingerprint recognition module in the vehicle function control device with the thumb, the first function group matched after the fingerprint recognition module recognizes the thumb fingerprint feature of the first user is assumed to be the in-vehicle atmosphere light control; D2, monitor whether the finger of the first user with the touch fingerprint feature keeps pressing down on the fingerprint recognition module of the movable vehicle function control device (for example, monitor whether the thumb keeps pressing down on the fingerprint recognition module at this time), if so, start monitoring whether a gesture trajectory feature is formed within a preset time duration and proceed to step D3; if not, prompt the first user to press down the fingerprint recognition module; D3, monitor whether a gesture trajectory feature is formed within a preset time duration (at this time, monitor whether a gesture trajectory feature is formed within the camera's field of view, and it can be the first user or other users who form the gesture trajectory), if so, match the second function group associated with the formed gesture trajectory feature (for example, it is the brightness adjustment control function of the atmosphere light. For example, when the gesture draws a clockwise circle, the atmosphere light is brightened, and when it draws a counterclockwise circle, the atmosphere light is dimmed). The second function group and the first function group have a binding relationship (which means that the second function group can only be activated when each vehicle control function under the first function group is in an active state. For example, only after entering the atmosphere light control function can the brightness control function of the atmosphere light be activated); if not, terminate the matching process of the second function group.

[0034] The following briefly describes the hardware structure of the movable vehicle function control device provided in this embodiment.

[0035] The hardware structure of the movable vehicle function control device provided in this embodiment includes: 1. Fingerprint recognition module Adopt a capacitive or optical fingerprint recognition sensor, which is arranged below the upper surface of the vehicle function control device and is closely attached to the touch sensing layer. The capacitive type uses the capacitance change between the human skin and the sensor to recognize the fingerprint pattern; the optical type obtains the fingerprint image through light reflection. The selection of the fingerprint recognition sensor can be determined according to cost and accuracy requirements, and it is required to have the characteristics of fast acquisition and accurate recognition to quickly and accurately complete the fingerprint recognition.

[0036] 2. Button press detection module The pressing button is provided on the movable vehicle function control device. The pressing button is preferably a fingerprint recognition module, that is, the fingerprint recognition module has a downward pressing function. After the button is pressed, it resets by its own elasticity. A micro switch is arranged inside the button and is connected to the pressing detection circuit, which is used to identify the user's operations such as long pressing, short pressing, and double clicking on the button.

[0037] 3. Bluetooth communication module An embedded BLE (Bluetooth Low Energy) module is provided on the movable vehicle function control device, communicates with the vehicle head unit system, supports multiple connections, and has the characteristic of low communication latency.

[0038] 4. Control module The control module is preferably an MCU chip, which is embedded in the movable vehicle function control device, responsible for the functional logic of the entire device, used to receive the detection signals of the fingerprint recognition module and the button pressing detection module. After being processed by the built-in algorithm, it generates a function group matching instruction or a function group switching instruction and sends it to the vehicle head unit system. The vehicle head unit system matches the function group currently required by the user from the function group library according to the received function group matching instruction, and switches the vehicle functions that the vehicle function control device can currently control to the vehicle control functions under the matched function group, or directly switches to the vehicle control functions under the corresponding function group carried in the instruction according to the received function group switching instruction.

[0039] The fingerprint recognition module, the button pressing detection module, and the Bluetooth communication module are connected to the corresponding pins of the MCU and communicate through buses such as SPI or I²C. The MCU judges the operation type according to the received information, generates the corresponding control instruction, and sends it to the vehicle head unit system through the Bluetooth communication module.

[0040] The following specifically elaborates on the implementation process of the vehicle function control method based on fingerprint information provided in this embodiment. The specific control process is as follows: 1. System initialization. The MCU control chip reads the preset fingerprint and function configuration information from the Flash, and a wireless communication connection is established between the Bluetooth communication module and the vehicle head unit system.

[0041] 2. When a finger touches the upper surface of the fingerprint recognition module, the fingerprint recognition module collects the touch fingerprint features of the user and transmits them to the MCU control chip. The MCU control chip compares the pre-stored fingerprint information to determine the user identity corresponding to the recognized fingerprint features. If the recognition is successful, it proceeds to the next step. If the recognition fails, it waits for the user to touch again or prompts that the identity recognition fails.

[0042] 3. The button pressing detection module detects the button action. Once it detects that the button is pressed, it further determines whether it is a long press, a short press, or a double click, and sends the determined pressing action type information to the MCU control chip.

[0043] 4. The MCU control chip matches the pre - stored corresponding function configuration information according to the fingerprint feature recognition result and the pressing action detection result, and then generates a control instruction to execute the function group associated with the matched function configuration information. For example, if the thumb fingerprint + short press is recognized, and the function configuration information corresponding to "thumb fingerprint + short press" is matched as "adjust the seat back forward by 10 cm and tilt backward by 15°", the MCU control chip generates a control instruction to execute the above - mentioned function configuration information, and then sends this control instruction to the vehicle system through the Bluetooth communication module. After receiving this control instruction, the vehicle system controls the seat to perform the above - mentioned adjustment actions.

[0044] The method for user - defined function groups is described as follows: The user customizes the vehicle control function in a specified scenario through the movable vehicle function control device provided in this embodiment. For example, for the air - conditioner function setting, after the user adjusts parameters such as the air - conditioner temperature, wind speed, and mode, through a specific operation on the button, such as touching the thumb fingerprint + long press, the current function setting of the air - conditioner is associated with their own thumb fingerprint.

[0045] When this function setting is changed by other users, the user only needs to control the air - conditioner function to quickly restore to the previously saved setting state with one key through the associated thumb fingerprint again. The method for one - key restoration is, for example, touching the thumb fingerprint + short press.

[0046] In the vehicle - using scenario, there are often multiple users taking turns to drive the vehicle. For example, when the father is driving, after his fingerprint is recognized, the function group automatically switches to the configuration that the father is used to, such as the air - conditioner temperature is adjusted to 25°C and the news broadcast is default - opened on the entertainment system; when the mother is driving, after her fingerprint is recognized, the function group switches to the configuration suitable for the mother's habit, such as the air - conditioner temperature is adjusted to 26°C and popular music is played on the entertainment system. Through the vehicle function control device based on fingerprint information provided in this embodiment, the function switching is quickly and conveniently realized among multiple users, greatly improving the user experience and avoiding the cumbersome operation of readjusting the functions every time someone changes to drive.

[0047] For some special - need groups, such as the elderly or drivers with physical disabilities, complex vehicle function operations may be difficult. They can map fingerprints to functions and set functions such as emergency calls and automatic parking, which are commonly used, to be triggered with one key, facilitating quick operation in case of emergency.

[0048] For the fleet management of logistics enterprises, during driving, drivers need to frequently operate various functions of the vehicle, such as cargo temperature monitoring, door opening and closing control, vehicle status monitoring, etc. By binding fingerprints to functions, during driving, drivers can quickly call function groups related to logistics transportation without having to distractedly look for operation buttons, thus improving driving safety.

[0049] In addition, this embodiment also provides a method for switching vehicle functions through multi-fingerprint operation sequences and fingerprint gesture sequences. By collecting multi-fingerprint operation sequences within a collection time window (such as within less than 0.5 s), comparing them with pre-configured operation sequence templates for similarity, and executing the template function group corresponding to the operation sequence template with the maximum similarity, the types of fingerprint control function switching are increased, enabling application in more scenarios. For example, when the multi-fingerprint operation sequence is "thumb double-click + index finger short press", the emergency call function is triggered, and the in-vehicle SOS module is awakened through the BLE Bluetooth communication module, quickly and conveniently triggering a special function and effectively preventing misoperations.

[0050] Vehicle function control based on fingerprint gesture sequences enriches the types of vehicle function control based on fingerprints, making the function control of the vehicle more interesting and intelligent.

[0051] In summary, as Figure 1 and Figure 2 shown, the vehicle function control method based on fingerprint information provided by this embodiment includes the steps: S1, a movable vehicle function control device identifies the identity characteristics of a user; S2, match the vehicle control function group associated with the identified identity characteristics from the function group library; S3, switch the controllable functions of the vehicle function control device at the current time to each vehicle control function under the function group. To achieve the above first and fourth technological innovation points, this embodiment adopts the following technical solutions: Each of the at least one function group matched in step S2 is respectively bound to a corresponding in-vehicle position area. Before executing step S3 after executing step S2, execute the step: L1, identify the current in-vehicle position area where the movable vehicle function control device is located, then match the function group associated with the identified in-vehicle position area from each function group matched in step S2, and step S3 executes each vehicle control function under the function group matched in step L1; The method for identifying the current in-vehicle position area where the vehicle function control device is located is: Iteratively optimize the initial positioning result of the movable vehicle control device under the condition of multi-point layout of base station nodes, output the positioning result of the vehicle function control device in the vehicle interior space, and then match the function group associated with the vehicle interior position area referred to by the positioning result.

[0052] Another method for identifying the current position area of the vehicle function control device in the vehicle interior can be: positioning the vehicle function control device in the vehicle through UWB, or reading the position information of the vehicle function control device by NFC tags adsorbed in various areas of the vehicle interior, so as to realize the positioning of the device.

[0053] Preferably, positioning the device in the vehicle through UWB is specifically: by reading the position information of the positioning tag carried in the vehicle function control device in the UWB base station array, outputting the positioning result of the vehicle function control device in the vehicle interior space, and then matching the function group associated with the vehicle interior position area referred to by the positioning result.

[0054] The following specifically describes the method for accurately positioning the movable vehicle function control device in the vehicle provided in this embodiment.

[0055] This embodiment adopts a method of iteratively optimizing the initial positioning result of the movable vehicle function control device under the condition of multi-point layout of base station nodes to achieve accurate positioning of the movable vehicle function control device in the vehicle interior space.

[0056] The method for generating the initial positioning result of the vehicle function control device moving in the vehicle interior space includes the steps: A1. Around the vehicle edge forming the vehicle interior space, arrange at least 3 base station nodes at different positions; as Figure 3 shown in the figure, arrange one base station node 1 on each of the left and right sides in front of the vehicle and the left and right sides behind the vehicle, and the tag node 2 is arranged on the movable vehicle function control device that needs to be initially positioned. The layout strategy of the base station nodes can be a three-point layout, a four-point layout or other types of multi-point layouts. In this embodiment, a four-point layout is preferably adopted, and they are respectively arranged on the left and right sides in front of the vehicle and the left and right sides behind the vehicle.

[0057] A2. According to the relative distance relationship between the tag node and each base station node, solve the initial positioning result of the vehicle function control device installed with this tag node in the vehicle. The specific method includes the steps: A21. Construct a vehicle coordinate system. The construction method is: In this embodiment, since the base station nodes are fixed on the vehicle, the pose of the base station nodes relative to the vehicle and the pose between the base station nodes remain unchanged. Therefore, the vehicle coordinate system is used as the world coordinate system, and the origin of this world coordinate system can beFigure 3 The location of the mid-base station node P1, where the abscissa of the world coordinate system is the width direction of the vehicle, the ordinate is the length direction of the vehicle, and the z-axis coordinate is the height direction of the vehicle.

[0058] A22. Calculate the radio frequency transceiver duration between the tag node and each base station node , is the duration for the tag node to send a radio frequency signal to the base station node , and from this base station node returns the radio frequency signal to the tag node; A23. Calculate the distance between the tag node and each base station node , , represents the propagation speed of the radio frequency signal in the air; By , the straight-line distance between the tag node and each base station node is obtained , realizing the initial positioning of the vehicle function control device provided with the tag node in the vehicle coordinate system constructed.

[0059] However, the initial positioning method provided by steps A21 - A23 for the vehicle function control device usually has errors. Especially when the vehicle function control device is moving continuously, it may cause drift in the continuously acquired initial positioning data. To solve this problem, the present embodiment provides the following method to iteratively optimize the initial positioning result, which specifically includes the steps: B1. Let the true position coordinates of the vehicle function control device at the current moment be denoted as , the true position coordinates of the vehicle function control device at the previous moment of the current moment are , As the initial state , then calculate the residual term , the Jacobian matrix and the update increment ; are respectively the th residual in ; B2. Let , where is , is .

[0060] In step B1, the residual term the One residual The calculation method is expressed by the following formula (1):

[0061] In formula (1), represents the position coordinates of the th base station node in the constructed world coordinate system; represents the straight-line distance between the vehicle function control device and the th base station node; Among them, , respectively represent the horizontal axis coordinate value, vertical axis coordinate value, and z-axis coordinate value of the vehicle function control device in the world coordinate system at the current moment; respectively represent the horizontal axis coordinate value, vertical axis coordinate value, and z-axis coordinate value of the th base station node in the world coordinate system.

[0062] The Jacobian matrix in step B1 is calculated as follows: Derive the residual term with respect to the optimization variable to calculate the Jacobian matrix , and the calculation method is expressed by the following formula (2):

[0063] represents the th row of the Jacobian matrix

[0064] In step B1, the update increment is expressed by the following formula (3):

[0065] In formula (3), represents the transpose of the Jacobian matrix ; Update until is less than the preset increment threshold or the maximum number of iterations is reached. The increment threshold is preferably .

[0066] Through the above method, the optimized label node, that is, the true coordinate position of the movable vehicle function control device, is obtained , and compared with directly using the initial positioning result, the optimized positioning result can significantly reduce the positioning error.

[0067] In this embodiment, before identifying the current position area of the vehicle function control device inside the vehicle, it is first determined whether the movable vehicle function control device is inside the vehicle. The determination method includes the steps: C1. Define a vertex list of the polygon formed by directly connecting each base station node, denoted as: , represents the number of vertices of the polygon, represents the -th vertex, respectively represent the horizontal axis coordinate value and the vertical axis coordinate value of the -th vertex in the plane coordinate system; C2. Starting from the vehicle function control device, define a ray parallel to the x-axis of the plane coordinate system; C3. Traverse each side of the polygon, extract the sides that intersect with the ray, and obtain the horizontal axis coordinate values of the intersection points; C4. Determine whether the number of intersection points that satisfy the condition that the horizontal axis coordinate value of the intersection point is greater than the horizontal axis coordinate value of the vehicle function control device is odd; If so, it is determined that the vehicle function control device is currently inside the vehicle; If not, it is determined that the vehicle function control device is currently outside the vehicle.

[0068] It should be emphasized here that in this embodiment, the base station nodes are preferably arranged in a 4-point layout, that is, the polygon is preferably a quadrilateral.

[0069] After determining that the vehicle function control device is inside the vehicle and obtaining the specific positioning coordinates of the vehicle function control device inside the vehicle, the method for identifying the current position area of the vehicle function control device inside the vehicle is as follows: In this embodiment, the in-vehicle control area can be a circular area, a rectangular area, a polygonal area or any other two-dimensional area, or it can be a three-dimensional area, preferably a rectangular cube area in three-dimensional space.

[0070] The method for calculating the in-vehicle control area where the vehicle function control device currently falls is as follows: Define the center coordinates of the -th control area inside the vehicle as , are respectively the horizontal axis coordinate value, the vertical axis coordinate value and the z-axis coordinate value in three-dimensional space. The length, width and height of this control area are respectively denoted as , the lower boundary and the upper boundary of the -th control area corresponding to the horizontal axis coordinate are respectively , ; the The lower and upper boundaries of a control region corresponding to the vertical axis coordinates are respectively , ; The lower and upper boundaries of the th control region corresponding to the z-axis coordinates are respectively , .

[0071] Then, it is judged whether the real position coordinates of the vehicle function control device at the current moment are and satisfy and and . If so, it is determined that the vehicle function control device is in the th in-vehicle control region. If no predefined in-vehicle control region is matched, it is determined that the vehicle function control device falls into the invalid region, and the switching of the controllable function is refused or switched to the default function.

[0072] In addition, it should be noted that when different passengers are sitting in the same in-vehicle control region, the same or different controllable functions are bound to the same in-vehicle control region.

[0073] This embodiment also provides another method for determining the position area of the movable vehicle function control device in the vehicle. The specific determination method is as follows: Attach the vehicle function control device integrated with the NFC reading module to the NFC electronic tag set at the current in-vehicle position area where the vehicle function control device is located. After the NFC reading module reads the unique code of the NFC electronic tag, it sends it to the vehicle-mounted system; The vehicle-mounted system matches the position area referred to by the unique code of the NFC electronic tag, so as to identify the current in-vehicle position area of the vehicle function control device in the vehicle.

[0074] It should be stated that the above specific implementation manners are only the preferred embodiments of the present invention and the applied technical principles. Those skilled in the art should understand that various modifications, equivalent replacements, changes, etc. can be made to the present invention. However, as long as these transformations do not deviate from the spirit of the present invention, they should be within the protection scope of the present invention. In addition, some terms used in the specification and claims of this application are not restrictive, but are only for the convenience of description.

Claims

1. A vehicle function control method based on fingerprint information, characterized in that: Includes steps: S1, the movable vehicle function control device recognizes the identity characteristics of the user; S2, matching the vehicle control function group associated with the identified identity feature from a function group library; S3, switching the current time controllable function of the vehicle function control device to each vehicle control function under the function group.

2. The vehicle function control method based on fingerprint information according to claim 1, characterized in that: A fingerprint recognition module is integrated on the movable vehicle function control device for recognizing the fingerprint information of the user as the identity feature of the user.

3. The vehicle function control method based on fingerprint information according to claim 1, characterized in that: A Bluetooth communication module is integrated on the movable vehicle function control device for establishing a Bluetooth communication connection with the vehicle system. The interactive information for switching the controllable functions in steps S1-S3 is transmitted via Bluetooth communication.

4. The vehicle function control method based on fingerprint information according to any one of claims 1 to 3, characterized in that: The method of matching the functional group in step S2 is: The vehicle function control device matches the function group associated with the identified identity feature from the stored function group library; Alternatively, the vehicle function control device sends the identified identity feature to the vehicle system, and the vehicle system matches the function group associated with the received identity feature from the function group library and sends it back to the vehicle function control device.

5. The vehicle function control method based on fingerprint information according to claim 1, characterized in that: The user learns each vehicle control function through the learning button arranged on the movable vehicle function control device, and the learning method is as follows: After the user presses the fingerprint recognition module set on the vehicle function control device with a finger and successfully recognizes the fingerprint feature, the user presses the fingerprint recognition module downward for a preset time to enter the vehicle control function learning state, and then the user sets various vehicle control functions required by the user. After the setting is completed, the user presses the fingerprint recognition module downward again to reset the fingerprint recognition module and complete the learning; Alternatively, first set the vehicle control functions you need, then press the fingerprint recognition module to successfully recognize the fingerprint feature and then press and hold it down for a preset time to complete the function learning.

6. The vehicle function control method based on fingerprint information according to claim 1 or 3, characterized in that: The identity feature identified by the user in step S1 includes a multi-fingerprint operation sequence within a time window, and the operation features in the multi-fingerprint operation sequence include at least one touch fingerprint feature and / or at least one button pressing feature associated with the same user.

7. The vehicle function control method based on fingerprint information according to claim 6, characterized in that: The method of matching the functional group in step S2 is: Taking the touch fingerprint feature of the user identified as the start instruction for generating the multi-fingerprint operation sequence, forming the multi-fingerprint operation sequence with the identified operation action features of each type in chronological order, and recording the duration of forming the multi-fingerprint operation sequence as the time window associated with the multi-fingerprint operation sequence; Acquire a time window threshold range within which the time window falls, and match each operation sequence template associated with the time window threshold range from a template library; A similarity comparison is performed between the multi-fingerprint operation sequence and each of the matched operation sequence templates, the operation sequence template with the maximum similarity is matched, and the template function group associated with the matched operation sequence template is used as the function group required by the user at the current moment.

8. The vehicle function control method based on fingerprint information according to claim 1 or 3, characterized in that: In step S1, the identity features of the user identified include a fingerprint gesture sequence, and the operation features in the fingerprint gesture sequence include button operation features of the first user, and / or gesture trajectory features of the second user or the first user; the button operation features of the first user include touch fingerprint features and / or button pressing features.

9. The vehicle function control method based on fingerprint information according to claim 8, characterized in that: Step S2: The method for matching the functional group comprises the following steps: D1, matching a first function group associated with the touch fingerprint feature identified by the first user and controlling the vehicle system to execute each vehicle control function under the first function group; D2, monitoring whether the first user's finger with the touch fingerprint feature keeps pressing down on the fingerprint recognition module of the movable vehicle function control device, If yes, start monitoring whether the gesture trajectory feature is formed within the preset time and proceed to step D3; If not, prompting the first user to press down the fingerprint recognition module; D3, monitoring whether the gesture trajectory feature is formed within the preset time period, If yes, then a second function group associated with the formed gesture trajectory feature is matched, and the second function group and the first function group have a binding relationship; If not, the second function group matching process is terminated.

10. The vehicle function control method based on fingerprint information according to claim 1, characterized in that: At least one of the function groups matched in step S2 is respectively bound to a corresponding in-vehicle location area. After executing step S2 and before executing step S3, the following steps are executed: L1, identifying the current location area of ​​the movable vehicle function control device in the vehicle, and then matching the function group associated with the identified location area from each of the function groups matched in step S2, and step S3 executing each vehicle control function under the function group matched in step L1; The method for identifying the current location area of ​​the vehicle function control device in the vehicle is: locating the position of the vehicle function control device in the vehicle through UWB, or reading the location information of the vehicle function control device through NFC tags attached to various areas in the vehicle, thereby realizing the positioning of the device.

11. The vehicle function control method based on fingerprint information according to claim 10, characterized in that: The position of the device in the vehicle is located through UWB, specifically: by reading the position information of the positioning tag installed in the vehicle function control device in the UWB base station array, outputting the positioning result of the vehicle function control device in the vehicle interior space, and then matching the function group associated with the vehicle interior position area referred to by the positioning result.

12. The vehicle function control method based on fingerprint information according to claim 10, characterized in that: The location information is read through the adsorbed NFC tag, specifically: The vehicle function control device with an integrated NFC reading module is attached to the NFC electronic tag at the current location in the vehicle. The device reads the unique code of the current NFC electronic tag, which corresponds to the preset position of the NFC tag, thereby obtaining the positioning result of the device in the vehicle, and then matching the function group associated with the location area in the vehicle referred to by the positioning result.

13. A vehicle function control device based on fingerprint information, which can implement the vehicle function control method based on fingerprint information as claimed in any one of claims 1 to 12, characterized in that: include: Fingerprint recognition module, used for the user's touch fingerprint feature; a button pressing detection module, used to detect a pressing feature of a button provided in the vehicle function control device by a user; A control module is connected to the fingerprint recognition module and / or the button press detection module, and is used to match the function group currently required by the user from the function group library according to the recognized touch fingerprint characteristics and / or button press characteristics, or to instruct the vehicle system to match the function group currently required by the user from the function group library, and the vehicle system executes the matched function group.

Images