Vehicle Function Control Method and Device Based on Fingerprint Information

Abstract

The present invention discloses a vehicle function control method and device based on fingerprint information, providing an algorithm for accurately identifying the position area of a movable vehicle function control device in a vehicle. Through this algorithm, the function switching based on the position area of the vehicle function control device is made more accurate; a fingerprint recognition module is embedded in the vehicle function control device, and 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 the fingerprint information; 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, flexible and interesting, and improving the user experience.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle control, and particularly relates 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 at positions such as the central control panel and doors, 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 integration degree, its operation during driving is likely to distract the driver's attention and there are potential safety hazards. 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, those skilled in the art expect to have a vehicle function control device with a movable physical form, which vehicle owners or passengers can hold to flexibly operate various vehicle control functions, and the device can accurately and quickly adaptively switch to the various vehicle control functions required by the user in the current scenario and / or the position area where the user is currently located in the vehicle.

[0004] However, to achieve the above expectations of those skilled in the art, the following two technical problems need to be solved:

[0005] 1. How the movable vehicle function control device can specifically and accurately and quickly adaptively realize the different vehicle function control requirements of different users in the current vehicle use scenario;

[0006] 2. The movable vehicle function control device needs to ensure that the vehicle control functions are accurately automatically switched to the various vehicle control functions required by the position area where the user is currently located in the vehicle. The prerequisite is to accurately identify the position area where the movable vehicle function control device is located in the vehicle. However, the interior space of the vehicle is narrow and may be blocked by obstacles such as the human body. Conventional positioning methods cannot meet the accuracy requirements for in-vehicle positioning in this application, which is also one of the technical problems that this application needs to overcome. Summary of the Invention

[0007] The present invention aims to accurately and quickly adaptively switch to the various vehicle control functions required by the user in the current vehicle use scenario and / or the position area where the user is currently located in the vehicle according to different user identities, and provides a vehicle function control method and device based on fingerprint information.

[0008] To achieve this purpose, the present invention adopts the following technical solutions:

[0009] Provided is a vehicle function control method based on fingerprint information, including the steps of:

[0010] S1, a movable vehicle function control device identifies the identity characteristics of a user;

[0011] S2, match the vehicle control function group associated with the identified identity characteristics from the function group library;

[0012] S3, switch the currently controllable functions of the vehicle function control device to each vehicle control function under the function group.

[0013] Preferably, a fingerprint recognition module is integrated on the movable vehicle function control device for recognizing the fingerprint information of the user as the identity characteristics of the user.

[0014] 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.

[0015] Preferably

[0016] , the method for matching the function group in step S2 is:

[0017] The vehicle function control device matches the function group associated with the identified identity characteristics from the stored function group library;

[0018] Alternatively, 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.

[0019] Preferably, the user learns each vehicle control function through a learning button provided on the movable vehicle function control device, and the learning method is:

[0020] After the user presses the fingerprint recognition module provided on the vehicle function control device with a finger to successfully recognize 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;

[0021] 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.

[0022] Preferably, the identity feature of the user recognized in step S1 includes a multi-finger operation sequence within a time window, and the operation features in the multi-finger operation sequence include at least one touch fingerprint feature and / or at least one button pressing feature associated with the same user.

[0023] Preferably, the method for matching the function group in step S2 is as follows:

[0024] Taking the recognized touch fingerprint feature of the user as the start instruction for generating the multi-finger operation sequence, forming the multi-finger operation sequence with the recognized operation action features of various types in chronological order, and recording the duration of forming the multi-finger operation sequence as the time window associated with the multi-finger operation sequence;

[0025] Obtaining the time window threshold range into which the time window falls, and matching each operation sequence template associated with the time window threshold range from the template library;

[0026] Performing a similarity comparison between the multi-finger 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 demand at the current moment.

[0027] Preferably, the identity feature of the user recognized 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.

[0028] Preferably, the method for matching the function group in step S2 includes the following steps:

[0029] 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;

[0030] 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,

[0031] If so, starting to monitor whether the gesture trajectory feature is formed within a preset duration and transferring to step D3;

[0032] If not, prompting the first user to press down the fingerprint recognition module;

[0033] D3, monitoring whether the gesture trajectory feature is formed within the preset duration,

[0034] If so, match the second function group associated with the formed gesture trajectory feature, and there is a binding relationship between the second function group and the first function group;

[0035] If not, terminate the second function group matching process.

[0036] Preferably, at least one of the function groups matched in step S2 is respectively bound to a corresponding in-vehicle position area. Before step S3 is executed after step S2 is executed, the following steps are executed:

[0037] L1. Identify the current in-vehicle position area where the movable vehicle function control device is located, and then match the function group associated with the identified in-vehicle position area among the function groups matched in step S2. Step S3 executes each vehicle control function under the function group matched in step L1;

[0038] The method for identifying the current in-vehicle position area where the vehicle function control device is located is: positioning the vehicle function control device in the vehicle through UWB, or reading the position information of the vehicle function control device through NFC tags adsorbed in each area of the vehicle, so as to realize the positioning of the device.

[0039] 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 in-vehicle space, and then matching the function group associated with the in-vehicle position area indicated by the positioning result.

[0040] Preferably, reading the position information through the adsorbed NFC tag is specifically:

[0041] Attach the vehicle function control device with an NFC reading module integrated inside to the NFC electronic tag at the current in-vehicle position where it is located. The device reads the unique code of the current NFC electronic tag, and this code corresponds to the preset position 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 in-vehicle position area indicated by the positioning result.

[0042] 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:

[0043] A fingerprint recognition module for the touch fingerprint features of the user;

[0044] A button press detection module for detecting the press features of the buttons set on the vehicle function control device pressed by the user;

[0045] A control module, connected to the fingerprint recognition module and / or the button pressing detection module, is configured to match the function group required by the user currently from the function group library according to the recognized touch fingerprint feature and / or button pressing feature, or instruct the vehicle-mounted system to match the function group required by the user currently from the function group library, and the vehicle-mounted system executes the matched function group.

[0046] The present invention has the following beneficial effects:

[0047] 1. A set of algorithms for accurately identifying the position area of the movable vehicle function control device in the vehicle is provided. Through this algorithm, the function switching based on the position area of the vehicle function control device is made more accurate.

[0048] 2. A fingerprint recognition module is embedded in the vehicle function control device. By constructing a mapping relationship between the fingerprint information and the vehicle control function, the corresponding vehicle control function can be quickly matched according to the fingerprint information.

[0049] 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 instruction of the vehicle function control device.

[0050] 4. The same or different vehicle control functions can be preset for the different fingerprints of different fingers of the same user in the same or different application scenarios or in the same or different vehicle areas. This greatly improves the richness of the controllable functions of the movable vehicle function control device. And through the identification of the identity information and the position of the vehicle function control device in the vehicle, it can be adaptively switched to the control functions associated with the recognized identity and / or position area, making the control of vehicle functions more intelligent, more flexible, and improving the user experience. Description of the Drawings

[0051] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly introduced below. Obviously, the following described drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0052] Figure 1 It is a step diagram for implementing the vehicle function control method based on fingerprint information provided by an embodiment of the present invention;

[0053] Figure 2 It is a flowchart for implementing the vehicle function control method based on fingerprint information provided by this embodiment;

[0054] Figure 3It is a schematic diagram of arranging base station nodes and tag nodes at the edge of a vehicle. Specific implementation manners

[0055] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation manners.

[0056] Among them, the accompanying drawings are only for illustrative purposes, showing only schematic diagrams, rather than physical diagrams, and should not be construed as a limitation of this patent; in order to better illustrate the embodiments of the present invention, some components in the accompanying 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 accompanying drawings may be omitted.

[0057] In the accompanying 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 accompanying drawings, and 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, so the terms describing the positional relationship in the accompanying drawings are only for illustrative purposes and should not 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.

[0058] 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.

[0059] 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 4 points:

[0060] 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.

[0061] 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.

[0062] 3. The movable vehicle function control device communicates with the in-vehicle system via Bluetooth communication, enabling the in-vehicle system to quickly respond to function switching or function execution instructions of the vehicle function control device.

[0063] 4. Different fingerprints of different fingers of the same user can be preset with the same or different vehicle control functions in the same or different application scenarios or in the same or different vehicle areas. This greatly enhances the richness of the controllable functions of the movable vehicle function control device. Moreover, through the identification of the 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.

[0064] The following will explain one by one how the above four technological innovation points are specifically implemented in this embodiment.

[0065] To achieve the above second and third technological innovation points, this embodiment adopts the following technical solutions:

[0066] A fingerprint recognition module is integrated 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 in-vehicle system, and the in-vehicle 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.

[0067] Preferably, a communication connection is established between the vehicle function control device and the in-vehicle system via Bluetooth communication. That is, Bluetooth communication modules are provided in the vehicle function control device and the in-vehicle system, and a communication connection between the vehicle function control device and the in-vehicle system is established through Bluetooth communication between the Bluetooth communication modules.

[0068] Here, it should be noted 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, for example:

[0069] When the user presses the fingerprint recognition module set on the vehicle function control device, successfully recognizes the fingerprint features, and at the same time presses and holds downwards for a preset duration, the vehicle control function learning state is entered. Then, the user can set various vehicle control functions according to their own needs. After the setting is completed, press down the vehicle function control device again and reset it to complete this learning. Or, various vehicle control functions required by the user can be set first, and then the fingerprint recognition module set on the vehicle function control device is pressed. After successfully recognizing the fingerprint features and pressing and holding downwards for a preset duration at the same time, the learning is completed. After completing the function custom learning, the vehicle machine system stores the function group associated with the user who has completed the learning in the function group library. When the vehicle function control device switches off the various vehicle control functions of this user, the user can recognize their own fingerprint again through the fingerprint recognition module to switch back to the various vehicle control functions required by themselves.

[0070] In this embodiment, the identity features recognized by the user are preferably multi-fingerprint operation features, including at least one touch fingerprint feature and / or at least one button pressing feature associated with this 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 short-presses the fingerprint recognition module with the index finger. Then, the touch fingerprint features include the thumb fingerprint feature and the index finger fingerprint feature, and the button pressing features include the double-click pressing feature and the short-press pressing feature. The formed multi-fingerprint operation sequence can be expressed in chronological order as: thumb fingerprint feature - double-click pressing feature - index finger fingerprint feature - short-press pressing feature.

[0071] For the multi-fingerprint operation features, this embodiment also provides another method for matching function groups for the user, specifically:

[0072] Taking the recognized fingerprint features of the user as the start instruction for generating the multi-fingerprint operation sequence, forming the multi-fingerprint operation sequence by the recognized operation action features of various types 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;

[0073] Obtain the time window threshold range (such as 0.4 - 0.6 s) into which the time window falls, and match each operation sequence template associated with the time window threshold range from the template library;

[0074] Perform a similarity comparison between the multi-fingerprint operation sequence and each matched operation sequence template, match the operation sequence template with the maximum similarity, and use the template function group associated with the matched operation sequence template as the function group of the user's demand at the current moment. For example, the multi-fingerprint operation sequence is expressed as: thumb fingerprint feature - double-click press feature - index finger fingerprint feature - short press feature. The matched operation sequence template with the maximum similarity is expressed as: thumb fingerprint feature - double-click press feature - index finger fingerprint feature - short press feature. That is, if 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, the similarity of the two sequences is determined to be "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.

[0075] In this embodiment, the identity features recognized by the user preferably further include a fingerprint gesture sequence. 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. That is, the button operation and gesture control can be of the same user or different users. The button operation features of the first user include touch fingerprint features and / or button press features.

[0076] The method steps for matching the function group through the fingerprint gesture sequence include:

[0077] D1. Match the first function group associated with the touch fingerprint feature recognized by the first user and control the vehicle 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.

[0078] D2. Monitor whether the finger of the first user with the touch fingerprint feature keeps pressing down the fingerprint recognition module of the movable vehicle function control device (for example, monitor whether the thumb keeps pressing down the fingerprint recognition module at this time).

[0079] If so, start monitoring whether a gesture trajectory feature is formed within a preset time duration and proceed to step D3.

[0080] If not, prompt the first user to press down the fingerprint recognition module.

[0081] 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 field of view of the camera, which can be formed by the first user or other users).

[0082] If so, match the second function group associated with the formed gesture trajectory feature (such as the brightness adjustment control function of the ambient light, for example, drawing a clockwise circle with the gesture to brighten the ambient light and drawing a counterclockwise circle to dim the ambient light). The second function group has a binding relationship with the first function group (that is, the second function group can only be activated when the vehicle control functions under the first function group are in an active state. For example, the brightness control function of the ambient light can only be activated after entering the ambient light control function);

[0083] If not, terminate the second function group matching process.

[0084] The following briefly describes the hardware structure of the movable vehicle function control device provided in this embodiment.

[0085] The hardware structure of the movable vehicle function control device provided in this embodiment includes:

[0086] 1. Fingerprint recognition module

[0087] A capacitive or optical fingerprint recognition sensor is adopted and is arranged below the upper surface of the vehicle function control device, closely attached to the touch sensing layer. The capacitive type uses the capacitance change between the human skin and the sensor to identify 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 complete the fingerprint recognition quickly and accurately.

[0088] 2. Button pressing detection module

[0089] The pressing button is arranged on the movable vehicle function control device. The pressing button is preferably the 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 for identifying the user's operations such as long pressing, short pressing, and double clicking of the button.

[0090] 3. Bluetooth communication module

[0091] An internal BLE (low power Bluetooth) module is arranged on the movable vehicle function control device, communicates with the vehicle system, supports multiple connections, and has the characteristic of low communication latency.

[0092] 4. Control module

[0093] The control module is preferably an MCU chip, which is built into the movable vehicle function control device and is responsible for the functional logic of the entire device. It is used to receive the detection signals from the fingerprint recognition module and the button press 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 system. The vehicle 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.

[0094] The fingerprint recognition module, the button press 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 determines the operation type according to the received information, generates the corresponding control instruction, and sends it to the vehicle system through the Bluetooth communication module.

[0095] 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:

[0096] 1. System initialization: The MCU control chip reads the preset fingerprint and function configuration information from the Flash, and establishes a wireless communication connection between the Bluetooth communication module and the vehicle system.

[0097] 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.

[0098] 3. The button press 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 press action type information to the MCU control chip.

[0099] 4. The MCU control chip matches the corresponding pre-stored function configuration information according to the fingerprint feature recognition result and the press 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 "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 function configuration information, and then sends the control instruction to the vehicle system through the Bluetooth communication module. After receiving the control instruction, the vehicle system controls the seat to perform the above adjustment actions.

[0100] The method for user-defined function groups is described as follows:

[0101] 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 pressing, the current function setting of the air conditioner is associated with their own thumb fingerprint.

[0102] When the function setting is changed by other users, the user only needs to use the associated thumb fingerprint again to control the air conditioner function to quickly restore to the setting state saved by the user before. The method for one-key restoration is, for example, touching the thumb fingerprint + short pressing.

[0103] In the vehicle use scenario, there are often multiple users taking turns driving 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 defaultly 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 pop 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 having to readjust the functions every time someone changes to drive.

[0104] For some special-needs 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.

[0105] For the fleet management of logistics enterprises, drivers need to frequently operate various functions of the vehicle during driving, such as cargo temperature monitoring, door opening and closing control, and vehicle status monitoring. Through the binding of fingerprints and functions, drivers can quickly call the function group related to logistics transportation during driving without having to distractedly look for operation buttons, thereby improving driving safety.

[0106] In addition, this embodiment also provides a method for switching vehicle functions through multi-finger operation sequences and fingerprint gesture sequences. By collecting multi-finger operation sequences within a collection time window (such as within less than 0.5 s), comparing the similarity with a pre-configured operation sequence template, 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 to more scenarios. For example, when the multi-finger 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.

[0107] The 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.

[0108] In summary, as Figure 1 and Figure 2 shown, the vehicle function control method based on fingerprint information provided in this embodiment includes the steps:

[0109] S1, a movable vehicle function control device identifies the identity characteristics of a user;

[0110] S2, match the vehicle control function group associated with the identified identity characteristics from the function group library;

[0111] S3, switch the controllable functions of the vehicle function control device at the current time to each vehicle control function under the function group.

[0112] To achieve the above first and fourth technological innovation points, this embodiment adopts the following technical solutions:

[0113] 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:

[0114] L1, identify the position area where the movable vehicle function control device is currently located in the vehicle, then match the function group associated with the identified 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;

[0115] The method for identifying the position area where the vehicle function control device is currently located in the vehicle is:

[0116] Iteratively optimize the initial positioning result generated for 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 space, and then match the function group associated with the in-vehicle position area indicated by the positioning result.

[0117] Another method for identifying the current location area of the vehicle function control device inside the vehicle can be: positioning the vehicle function control device inside the vehicle through UWB, or reading the position information of the vehicle function control device by means of NFC tags adsorbed in various areas inside the vehicle, so as to achieve the positioning of the device.

[0118] Preferably, positioning the device inside the vehicle through UWB specifically includes: 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 space, and then matching the function group associated with the vehicle position area indicated by the positioning result.

[0119] The following specifically describes the method for accurately positioning the movable vehicle function control device inside the vehicle provided in this embodiment.

[0120] This embodiment adopts a method of iteratively optimizing the initial positioning result generated by 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 space.

[0121] The method for generating the initial positioning result of the vehicle function control device moving in the vehicle space includes the steps of:

[0122] A1. Around the vehicle edge forming the vehicle space, at least 3 base station nodes are arranged at different positions; as Figure 3 shown, one base station node 1 is arranged 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, which are respectively arranged on the left and right sides in front of the vehicle and the left and right sides behind the vehicle.

[0123] 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 inside the vehicle. The specific method includes the steps of:

[0124] A21. Construct a vehicle coordinate system, and the construction method is:

[0125] 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 be Figure 3 the position where the base station node P1 is located in

[0126] A22. Calculate the radio frequency transceiver duration between the tag node and each base station node , For transmitting a radio frequency signal from the tag node to the base station node , and from this base station node Return the duration experienced by this radio frequency signal to this tag node;

[0127] A23. Calculate the distance between the tag node and each base station node , , Indicates the propagation speed of the radio frequency signal in the air;

[0128] By , obtain the straight-line distance between the tag node and each base station node , and realize the initial positioning of the vehicle function control device provided with this tag node in the spatial position in the constructed vehicle coordinate system.

[0129] 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, this embodiment provides the following method to iteratively optimize the initial positioning result, which specifically includes the steps:

[0130] B1. Let the true position coordinates of the vehicle function control device at the current moment be denoted as , and the true position coordinates of the vehicle function control device at the previous moment at the current moment be , As the initial state , then calculate the residual term

[0131] , the Jacobian matrix and the update increment ; Are respectively in the th residual, ;

[0132] B2. Let , where, is , is .

[0133] In step B1, the in the residual term Residual The calculation method of is expressed by the following formula (1):

[0134]

[0135] In formula (1), represents the position coordinates of the th base station node in the constructed world coordinate system;

[0136] represents the straight-line distance between the vehicle function control device and the th base station node;

[0137] 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.

[0138] The Jacobian matrix in step B1 is calculated as follows:

[0139] 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):

[0140]

[0141] represents the th row in the Jacobian matrix

[0142] In step B1, the update increment is expressed by the following formula (3):

[0143]

[0144] In formula (3), represents the transpose of the Jacobian matrix ;

[0145] Update until is less than the preset increment threshold or the maximum number of iterations is reached. The increment threshold is preferably .

[0146] Through the above method, the true coordinate position of the optimized vehicle function control device with movable tag nodes is obtained. Compared with directly using the initial positioning result, the optimized positioning result can significantly reduce the positioning error.

[0147] In this embodiment, before identifying the current position area of the vehicle function control device in the vehicle, it is first determined whether the movable vehicle function control device is in the vehicle. The determination method includes the steps:

[0148] 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;

[0149] C2. Starting from the vehicle function control device, define a ray parallel to the x-axis of the plane coordinate system;

[0150] 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;

[0151] 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;

[0152] If so, it is determined that the vehicle function control device is currently in the vehicle;

[0153] If not, it is determined that the vehicle function control device is currently outside the vehicle.

[0154] 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.

[0155] After determining that the vehicle function control device is in the vehicle and obtaining the specific positioning coordinates of the vehicle function control device in the vehicle, the method for identifying the current position area of the vehicle function control device in the vehicle is:

[0156] 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.

[0157] The method for calculating the in-vehicle control area into which the vehicle function control device currently falls is:

[0158] Define the The central coordinates of a control area are , which 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 . For the th control area, the lower boundary and the upper boundary of the horizontal axis coordinate respectively correspond to and ; for the th control area, the lower boundary and the upper boundary of the vertical axis coordinate respectively correspond to and ; for the th control area, the lower boundary and the upper boundary of the z-axis coordinate respectively correspond to and .

[0159] 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 within the th in-vehicle control area. If no predefined in-vehicle control area is matched, it is determined that the vehicle function control device falls into the invalid area, and the switching of the controllable function is refused or switched to the default function.

[0160] In addition, it should be noted that when different passengers are sitting in the same in-vehicle control area, the same in-vehicle control area is bound to the same or different controllable functions.

[0161] 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:

[0162] 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;

[0163] The vehicle-mounted system matches the position area represented 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.

[0164] It should be noted that the above specific embodiments are only the preferred embodiments of the present invention and the technical principles applied. Those skilled in the art should understand that various modifications, equivalent substitutions, 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, Including the steps: S1, the movable vehicle function control device identifies the user's identity characteristics; S2, matches the vehicle control function group associated with the identified identity characteristics from the function group library; S3, switches the currently controllable functions of the vehicle function control device to each vehicle control function under the function group; At least one of the function groups matched in step S2 is respectively bound to the corresponding in-vehicle position area. Before executing step S3 after executing step S2, the following step is executed: L1, identifies the current in-vehicle position area where the movable vehicle function control device is located, and then matches the function group associated with the identified position area from each of the function groups matched in step S2. 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 generated for the movable vehicle function control device under the condition of multi-point layout of base station nodes, and output the positioning result of the vehicle function control device in the in-vehicle space; The method for generating the initial positioning result includes the steps: A1, arrange at least 3 base station nodes at different positions around the vehicle edge forming the in-vehicle space; A2, solve the initial positioning result of the vehicle function control device installed with the tag node in the vehicle according to the relative distance relationship between the tag node and each base station node; The method for iteratively optimizing the initial positioning result includes the steps: B1, let the vehicle function control device be at the current moment's true position coordinate be , the vehicle function control device at the current moment's previous moment's true position coordinate be , As 's initial state , then calculate the residual term , the Jacobian matrix and the update increment , are respectively 's th residual, ; B2, let , where is , is ; Residual term The th residual is calculated by the following formula (1): In formula (1), represents the position coordinates of the -th base station node in the constructed world coordinate system; Indicates the straight-line distance between the vehicle function control device and the th base station node; Among them, , respectively represent the abscissa coordinate value, ordinate 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 abscissa coordinate value, ordinate coordinate value, and z-axis coordinate value of the th base station node in the world coordinate system. Regarding the residual term with respect to the optimal variable take the derivative to calculate the Jacobian matrix , and the calculation method is expressed by the following formula (2): Denote the Jacobian matrix in the row; Updating the increment is expressed by the following formula (3): In formula (3), represents the transpose of the Jacobian matrix ; For update until the maximum number of iterations is reached.

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 identifying the user's fingerprint information as the user's identity characteristics.

3. The vehicle function control method based on fingerprint information according to claim 1, wherein A Bluetooth communication module is integrated on the movable vehicle function control device for establishing a Bluetooth communication connection with the vehicle-mounted system. The interaction information for realizing the controllable function switching in steps S1 - S3 is transmitted through Bluetooth communication.

4. The vehicle function control method based on fingerprint information according to any one of claims 1-3, characterized in that, The method for matching the function group 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-mounted system, and the vehicle-mounted 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.

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 set on the movable vehicle function control device. 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. 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 the 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.

6. The vehicle function control method based on fingerprint information according to claim 1 or 3, characterized in that Step S1: The identity features identified for the user include a multi-finger operation sequence within a time window. The operation features in the multi-finger 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, Step S2: The method for matching the function group is as follows: Using the identified touch fingerprint feature of the user as the start instruction for generating the multi-finger operation sequence, forming the multi-finger operation sequence by arranging the identified operation action features of various types in chronological order, and recording the duration of forming the multi-finger operation sequence as the time window associated with the multi-finger operation sequence. Obtaining the time window threshold range in which the time window falls, and matching out each operation sequence template associated with the time window threshold range from the template library. Performing a similarity comparison between the multi-finger operation sequence and each of the matched operation sequence templates, matching out 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.

8. The vehicle function control method based on fingerprint information according to claim 1 or 3, characterized in that, Step S1: The identity features identified for the user include a fingerprint gesture sequence. 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.

9. The vehicle function control method based on fingerprint information according to claim 8, characterized in that, The method for matching the function group in Step S2 includes the steps: D1, matching out the first function group associated with the identified 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 proceeding 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 out the second function group associated with the formed gesture trajectory feature, and the second function group has a binding relationship with the first function group; If not, terminating the matching process of the second function group.

10. A vehicle function control device based on fingerprint information, which can implement the vehicle function control method based on fingerprint information as described in any one of claims 1-9, characterized in that, Including: A fingerprint recognition module for the touch fingerprint feature of the user; A key pressing detection module for detecting the pressing feature of the button set in the vehicle function control device pressed by the user; A control module connected to the fingerprint recognition module and / or the key pressing detection module, for matching out the function group currently required by the user from the function group library according to the identified touch fingerprint feature and / or button pressing feature, or instructing the vehicle-mounted system to match out the function group currently required by the user from the function group library, and the vehicle-mounted system executes the matched function group.

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