CN116424265A - Intelligent key entering starting device integrating tire pressure monitoring, control method and vehicle - Google Patents

Abstract

The invention relates to an intelligent key entering starting device integrating tire pressure monitoring, a control method and a vehicle, which comprise the following steps: the intelligent tire pressure monitoring system comprises a digital key main node controller, four BLE positioning nodes and a tire pressure monitoring module; the BLE positioning node and the tire pressure monitoring module are used for outputting tire pressure information and acceleration information, receiving RSSI and AOA information of the intelligent key and sending the RSSI and AOA information to the digital key master node controller; the digital key main node controller is used for sending the tire pressure information to the vehicle after receiving the information uploaded by the BLE positioning node and the tire pressure monitoring module; meanwhile, the wheel speed information of the wheels is read, and the position of the intelligent key relative to the vehicle is calculated; and judging which area of the welcome area, the PE area and the PS area the intelligent key is in according to the position of the intelligent key relative to the vehicle, and performing corresponding actions. The invention can realize the tire pressure monitoring and keyless entry starting functions on the vehicle and has lower cost.

Description

Smart key entry and start device integrated with tire pressure monitoring, control method and vehicle

technical field

The invention belongs to the technical fields of tire pressure monitoring system (TPMS) and keyless entry and keyless start (PEPS) on vehicles, and specifically relates to a smart key entry starting device integrated with tire pressure monitoring, a control method and a vehicle.

Background technique

The existing smart key entry and starting device and the tire pressure detection system are two independent systems. Among them, the existing smart key entry and starting device generally requires more than two BLE positioning nodes to be installed on the vehicle end, and each BLE positioning node is the same as the vehicle terminal. The master BLE module communicates via LIN or CAN. Existing tire pressure detection systems generally require a tire pressure detection module with a positioning function to be arranged on each wheel. There are the problems of high material cost and heavy vehicle wiring workload. In addition, if there are many BLE positioning nodes on the vehicle, it will also increase the workload of the simulation of the design and selection of the installation position of the BLE positioning nodes.

Therefore, it is necessary to develop a new smart key entry and start device integrated with tire pressure monitoring, a control method and a vehicle.

Contents of the invention

The object of the present invention is to provide a smart key entry and start device integrated with tire pressure monitoring, a control method and a vehicle, which can realize the functions of tire pressure monitoring and keyless entry and start on vehicles, and the cost is relatively low.

In the first aspect, a smart key entry and start device integrated with tire pressure monitoring according to the present invention includes a digital key master node controller, and four BLE positioning nodes and tire pressure monitoring nodes that establish a communication connection with the digital key master node controller. The monitoring module, four BLE positioning nodes and the tire pressure monitoring module are respectively installed at the valves of the four hubs;

The BLE positioning node and the tire pressure monitoring module are used to output tire pressure information, acceleration information, and receive RSSI and AOA information of the smart key, and send the tire pressure information, acceleration information and the RSSI and AOA information of the smart key to the digital Key master node controller;

The digital key master node controller is used to send the tire pressure information to the car machine after receiving the information uploaded by the BLE positioning node and the tire pressure monitoring module; at the same time, it reads the wheel speed information, and calculates the BLE positioning node combined with the acceleration information and the position of the tire pressure monitoring module relative to the hub circle center, calculate the position of the smart key relative to the vehicle according to the position of the BLE positioning node and the tire pressure monitoring module relative to the hub circle center; and judge whether the smart key is in the welcome area, Which area in the PE area or PS area and take corresponding actions.

Optionally, calculate the position of the BLE positioning node and the tire pressure monitoring module relative to the hub circle center, specifically:

∂=arcsin [(A _c +A _v )/g]

A _v =V ² /R;

Among them, ∂ is the angle between the BLE positioning node and the tire pressure monitoring module and the horizontal line, and the value range is [0, 2Π); A _c is the measured value of the acceleration sensor in the BLE positioning node and the tire pressure monitoring module; Av is the tire rotation time The centrifugal acceleration brought; g is the acceleration of gravity; V is the wheel speed; R is the radius of the acceleration sensor in the BLE positioning node and the tire pressure monitoring module relative to the hub circle center;

The ∂ calculated by the formula has two values, and then the specific value of ∂ is determined by the change trend of Ac and the positive and negative rotation of the wheel speed, that is, the method of calculating and compensating the position of the servo sensor is given.

Optionally, the digital key master node controller is used to send a wake-up signal to the BLE positioning node and the tire pressure monitoring module;

The BLE positioning node and tire pressure monitoring module output tire pressure information and acceleration information after being awakened by the wake-up signal. In order to reduce power consumption, the BLE positioning node and tire pressure monitoring module are generally in a dormant state, and the digital key master node controller needs to send a wake-up signal to wake up when working.

Optionally, the BLE positioning node and the tire pressure monitoring module include a battery, a tire pressure monitoring chip ASIC connected to the battery, a first low-power Bluetooth SOC connected to the tire pressure monitoring chip ASIC, and a tire pressure monitoring chip ASIC connected A low-frequency signal receiving coil, and a first antenna connected to the first low-power bluetooth SOC;

The battery is used to provide energy;

The tire pressure monitoring chip ASIC can be awakened by a low-frequency signal, and automatically calculates the tire pressure information and simultaneously gives the acceleration information after being awakened;

The first low-power bluetooth SOC and the first antenna are used to realize two-way communication with the master node controller of the smart key and the digital key.

Optionally, the digital key master node controller includes an MCU controller, a power management unit connected to the MCU controller, a CAN interface, a low-frequency base station, a second low-power Bluetooth SOC, and a low-frequency transmitting coil connected to the low-frequency base station , and a second antenna connected to a second Bluetooth low energy SOC;

The power management unit is used to convert the constant power into the power required by the master node controller of the digital key;

The CAN interface is used to realize two-way communication with the vehicle;

The MCU controller is used to process data;

The low-frequency base station and the low-frequency transmitting coil are used to wake up the physical interface of the BLE positioning node and the tire pressure monitoring module;

The second low-power Bluetooth SOC and the second antenna are used to realize two-way communication with the smart key, the BLE positioning node and the tire pressure monitoring module.

In the second aspect, the control method of a smart key entry and start device integrated with tire pressure monitoring according to the present invention adopts the smart key entry and start device with integrated tire pressure monitoring according to the present invention, and the control method includes the following steps:

When the BLE positioning node and the tire pressure monitoring module are in the working mode, the BLE positioning node and the tire pressure monitoring module output tire pressure information and acceleration information; at the same time, the BLE positioning node and the tire pressure monitoring module scan the smart key and establish a connection to obtain the information of the smart key. RSSI, AOA information, and send tire pressure information, acceleration information and RSSI, AOA information of the smart key to the digital key master node controller;

After receiving the information uploaded by the BLE positioning node and the tire pressure monitoring module, the digital key master node controller sends the tire pressure information to the vehicle terminal for display; at the same time, it reads the wheel speed information, and calculates the BLE information in combination with the acceleration information. Based on the location of the positioning node and the tire pressure monitoring module relative to the center of the wheel hub, calculate the position of the smart key relative to the vehicle based on the position of the BLE positioning node and the tire pressure monitoring module relative to the center of the wheel hub; area, PE area, and PS area and take corresponding actions.

Optionally, the digital key master node controller periodically monitors whether the smart key enters the welcome area;

If it is detected that the smart key enters the welcome area and the vehicle has not made a welcome action within the preset time, the vehicle will be notified to make a welcome action.

Optionally, in response to detecting that the PE key is triggered and the smart key is in the PE area, a key valid instruction is sent to the vehicle machine, and the vehicle is unlocked.

Optionally, in response to detecting the engine start command and the smart key is within the PS area, a key valid command is sent, and the vehicle starts the engine.

In the third aspect, a vehicle according to the present invention adopts the smart key entry and start device integrated with tire pressure monitoring according to the present invention.

The invention has the following advantages: the invention integrates the traditional tire pressure detection ASIC chip and the low-power Bluetooth SOC chip and installs them on the wheel hub, and calculates the relative position of the follow-up BLE positioning node in real time through the method described in the invention, Obtaining tire pressure information at the same time can realize tire pressure monitoring functions on vehicles and keyless entry and start related functions, and is also applicable to the scene where the vehicle accurately locates the smart key in the locked state (static state). The invention saves the independent BLE positioning node assembly (consisting of low-power Bluetooth SOC chip, PCB board, power conversion unit, interface chip, PCB and shell, etc.) and supporting wiring harness, and reduces the system cost to the greatest extent.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and thus It should be regarded as a limitation on the scope, and those skilled in the art can also obtain other related drawings based on these drawings without creative work.

Fig. 1 is a system block diagram of the present embodiment;

Fig. 2 is the circuit block diagram of BLE positioning node and tire pressure monitoring module in the present embodiment;

Fig. 3 is the circuit block diagram of digital key master node controller in the present embodiment;

FIG. 4 is a schematic diagram of the relative position calculation of the follow-up BLE positioning node in this embodiment;

Fig. 5 is the program flowchart of BLE location node and tire pressure monitoring module in the present embodiment;

Fig. 6 is the flow chart of calculating the relative position of the follow-up BLE positioning node in this embodiment;

Fig. 7 is a flow chart of the keyless entry program implemented by the digital key master node controller in this embodiment;

Fig. 8 is a flow chart of the digital key master node controller implementing the keyless start program in this embodiment;

Fig. 9 is a flow chart of the tire pressure monitoring program implemented by the digital key master node controller in this embodiment.

Detailed ways

Embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present application are shown in the drawings, it should be understood that the application may be embodied in various forms and should not be construed as limited to the embodiments set forth herein; A more thorough and complete understanding of the application. It should be understood that the drawings and embodiments of the present application are for exemplary purposes only, and are not intended to limit the protection scope of the present application.

As shown in Figure 1, in this embodiment, a smart key entry and start device integrated with tire pressure monitoring includes a digital key master node controller, and four BLE positioning nodes that establish a communication connection with the digital key master node controller and The tire pressure monitoring module, four BLE positioning nodes and the tire pressure monitoring module are respectively installed at the valves of the four hubs. The BLE positioning node and the tire pressure monitoring module are used to output tire pressure information, acceleration information, and receive RSSI and AOA information of the smart key, and send the tire pressure information, acceleration information and the RSSI and AOA information of the smart key to the digital Key master node controller. The digital key master node controller is used to send the tire pressure information to the car machine after receiving the information uploaded by the BLE positioning node and the tire pressure monitoring module; at the same time, it reads the wheel speed information, and calculates the BLE positioning node combined with the acceleration information and the position of the tire pressure monitoring module relative to the hub circle center, calculate the position of the smart key relative to the vehicle according to the position of the BLE positioning node and the tire pressure monitoring module relative to the hub circle center; and judge whether the smart key is in the welcome area, Which area in the PE area or PS area and take corresponding actions.

In order to reduce power consumption, the BLE positioning node and tire pressure monitoring module are generally in a dormant state, and the digital key master node controller needs to send a wake-up signal to wake up when working.

As shown in Figure 1, it is the communication relationship between the smart key, the digital key master node controller, the BLE positioning node and the tire pressure monitoring module. The positioning node and the tire pressure monitoring module transmit a one-way low-frequency wake-up signal.

In this embodiment, the four BLE positioning nodes and tire pressure monitoring modules are the same, and are respectively installed at the valves of the four wheel hubs of the vehicle. The BLE positioning nodes and tire pressure monitoring modules have the functions of BLE communication, low-frequency signal reception wake-up and tire pressure monitoring , powered by batteries.

As shown in Figure 2, in this embodiment, the BLE positioning node and the tire pressure monitoring module include a battery, a tire pressure monitoring chip ASIC connected to the battery, and a first low-power Bluetooth SOC connected to the tire pressure monitoring chip ASIC, The low-frequency signal receiving coil connected with the tire pressure monitoring chip ASIC, and the first antenna connected with the first low-power bluetooth SOC. Described battery adopts button cell, is used for providing energy. The tire pressure monitoring chip ASIC includes an integrated voltage regulator, core, memory, clock, wake-up controller, IO port, serial communication interface, radio frequency emission controller, radio frequency transmitter, low frequency receiver, pressure sensor, Acceleration sensor, temperature sensor, etc., tire pressure monitoring chip ASIC can be awakened by low-frequency signals, and after being awakened, it can independently calculate tire pressure information and give acceleration information at the same time. The first low-power bluetooth SOC and the first antenna are used to realize two-way communication with the master node controller of the smart key and the digital key.

In this embodiment, the digital key master node controller is generally installed in the front central armrest or central control of the car. It has the functions of BLE connection communication, CAN communication and low-frequency signal transmission. communication.

As shown in Figure 3, in this embodiment, the digital key master node controller includes an MCU controller, a power management unit connected to the MCU controller, a CAN interface, a low-frequency base station, a second low-power bluetooth SOC, and The low-frequency transmitting coil connected to the low-frequency base station, and the second antenna connected to the second low-power bluetooth SOC. The power management unit is used to convert the constant power into the power required by the master node controller of the digital key. The CAN interface is used to realize two-way communication with the vehicle. The MCU controller is used to process data. The low-frequency base station and the low-frequency transmitting coil are used to wake up the BLE positioning node and the physical interface of the tire pressure monitoring module. The second low-power Bluetooth SOC and the second antenna are used to realize two-way communication with the smart key, the BLE positioning node and the tire pressure monitoring module.

The existing BLE positioning nodes are fixed, but the BLE positioning nodes and the tire pressure monitoring module in this embodiment are nodes that rotate with the hub, so they are not compatible with the existing BLE positioning algorithms.

In this embodiment, the position of the BLE positioning node and the tire pressure monitoring module relative to the hub circle center is calculated in real time, and then the position of the smart key relative to the vehicle is calculated according to the positions of the BLE positioning node and the tire pressure monitoring module relative to the hub circle center. Among them, as shown in Figure 4, calculate the position of the BLE positioning node and the tire pressure monitoring module relative to the hub circle center, specifically:

∂=arcsin [(A _c +A _v )/g] (1)

A _v =V ² /R; (2)

Among them, ∂ is the angle between the BLE positioning node and the tire pressure monitoring module and the horizontal line, and the value range is [0, 2Π); A _c is the measured value of the acceleration sensor in the BLE positioning node and the tire pressure monitoring module, which is a known quantity; Av is the centrifugal acceleration brought by the rotation of the tire; g is the acceleration of gravity; V is the wheel speed, which can be obtained through the car machine, and is a known quantity; R is the radius of the acceleration sensor in the BLE positioning node and the tire pressure monitoring module relative to the hub circle center . a is the BLE positioning node and tire pressure monitoring module; b is the wheel hub; R is the distance between the acceleration sensor in the BLE positioning node and the tire pressure monitoring module relative to the center of the wheel hub, and R is a known quantity.

Due to symmetry, the calculated ∂ has two values, one is located in the first quadrant and the other is located in the second quadrant. The specific value of ∂ can be judged by the wheel speed. When the wheel speed rotates clockwise, if the BLE positioning node and the tire pressure monitoring module are in the first quadrant, then _Ac is a process of gradually decreasing, and if it is in the second quadrant, then _Ac is a process of gradually increasing; on the contrary, When the wheel speed rotates counterclockwise, if the BLE positioning node and the tire pressure monitoring module are in the first quadrant, then _Ac is a process of gradually increasing, and if it is in the second quadrant, then _Ac is a process of gradually decreasing. Therefore, after ∂ is calculated as two values, the unique ∂ can be determined through the change trend of A _c and the positive and negative rotation of wheel speed. Similarly, when one of the calculated ∂ is located in the third quadrant and the other is located in the fourth quadrant, this method can also be used to determine the unique ∂.

In order to obtain the unique ∂ under static conditions, it is necessary to store the quadrant parameters where the BLE positioning node and tire pressure monitoring module are located, and it can be corrected and corrected in real time under dynamic conditions.

In this embodiment, a control method for a smart key entry and start device integrated with tire pressure monitoring, using the smart key entry and start device with integrated tire pressure monitoring as described in the present invention, the control method includes the following steps:

When the BLE positioning node and the tire pressure monitoring module are in the working mode, the BLE positioning node and the tire pressure monitoring module output tire pressure information and acceleration information; at the same time, the BLE positioning node and the tire pressure monitoring module scan the smart key and establish a connection to obtain the information of the smart key. RSSI, AOA information, and send tire pressure information, acceleration information and RSSI, AOA information of the smart key to the digital key master node controller;

After receiving the information uploaded by the BLE positioning node and the tire pressure monitoring module, the digital key master node controller sends the tire pressure information to the vehicle terminal for display; at the same time, it reads the wheel speed information, and calculates the BLE information in combination with the acceleration information. Based on the location of the positioning node and the tire pressure monitoring module relative to the center of the wheel hub, calculate the position of the smart key relative to the vehicle based on the position of the BLE positioning node and the tire pressure monitoring module relative to the center of the wheel hub; area, PE area, and PS area and take corresponding actions.

As shown in Figure 5, in this embodiment, the BLE positioning node and the tire pressure monitoring module are important perception cores, and their working steps are as follows:

S10: BLE positioning node and tire pressure monitoring module work in sleep mode by default;

S11: Determine whether the low-frequency signal receiving coil in the tire pressure monitoring chip ASIC has received a low-frequency wake-up signal, if yes, enter step S12, otherwise return to step S10;

S12, the tire pressure monitoring chip ASIC is awakened and enters the working mode;

S13: After the tire pressure monitoring chip ASIC is woken up, use the IO port to wake up the first low-power Bluetooth SOC chip, so that the first low-power Bluetooth SOC chip also enters the working mode;

S14: The tire pressure monitoring chip ASIC acquires pressure, temperature and acceleration information and calculates the tire pressure information, and transmits the acceleration information and tire pressure information to the first low-power Bluetooth SOC;

S15: The first low-power Bluetooth SOC scans the smart key and establishes a connection to obtain the RSSI and AOA information of the smart key;

S16: The first Bluetooth low energy SOC uploads the RSSI, AOA, tire pressure information and acceleration signal of the smart key message to the digital key master node controller through the BLE connection;

S17: After the above work is completed, the BLE positioning node and the tire pressure monitoring module are turned into a sleep mode as a whole.

As shown in Figure 6, in this embodiment, the calculation of the position of the BLE positioning node and the tire pressure monitoring module relative to the center of the wheel hub is a shared submodule for keyless entry and startup, and the shared program runs on the digital key master node controller. The working steps are as follows:

S20: Obtain the wheel speed information of the four wheels through the CAN interface;

S21: Obtain the acceleration information of the four BLE positioning nodes and the tire pressure monitoring module through BLE;

S22: Read the quadrant parameters (ie ∂) where the four BLE positioning nodes and the tire pressure monitoring module are respectively located;

S23: Calculate the unique angle ∂ through formulas (1) and (2).

The examples of realizing keyless entry, keyless start and tire pressure monitoring system functions in this embodiment are described below.

The program flow of keyless entry, start and tire pressure detection runs on the digital key master node controller. In this example, the vehicle works in the locked state by default, as shown in Figure 7. The keyless entry steps are as follows:

S30: The digital key master node controller periodically monitors the smart key;

S31: Determine whether the smart key has entered the welcome area, if yes, enter step S32, if not, return to step S30 after sleeping for 3 seconds;

S32: Determine whether the vehicle has made a welcome action within 60 seconds, if not, then enter step S33, if yes, then enter step S34;

S33: notify the vehicle to make a welcome action through the CAN interface;

S34: Detect whether the PE button is pressed; if the PE button is pressed, then enter step S35; if the PE button is not pressed, then return to step S30 after dormancy for 0.5 seconds;

S35: Use the low-frequency transmitting coil to transmit a low-frequency wake-up signal to wake up the four BLE positioning nodes and the tire pressure monitoring module;

S36: Receive the RSSI, AOA and acceleration information of the smart key message uploaded by the four BLE positioning nodes and the tire pressure monitoring module; receive the wheel speed information of the four wheels through CAN;

S37: Calculate the positions of the four BLE positioning nodes and the tire pressure monitoring module relative to the center of the corresponding wheel hub; calculate the smart key according to the positions of the four BLE positioning nodes and the tire pressure monitoring module relative to the center of the corresponding wheel hub, AOA, and RSSI information position relative to the vehicle;

S38: Determine whether the smart key is within the PE area according to the stored calibration data; if the smart key is within the PE area, proceed to step S39; if the smart key is not within the PE area, sleep for 0.1 second and return to step S30;

S39: Send an unlock command through CAN, and the vehicle is unlocked.

To start the engine, as shown in Figure 8, the process is as follows:

S40: The digital key master node controller periodically monitors the vehicle information through the CAN interface;

S41: Determine whether the engine start command is issued by the car machine, if yes, enter step S42, if not, return to step S40;

S42: Use the low-frequency transmitting coil to transmit a low-frequency wake-up signal to wake up the four BLE positioning nodes and the tire pressure monitoring module;

S43: Receive the RSSI, AOA and acceleration information of the smart key message uploaded by the four BLE positioning nodes and the tire pressure monitoring module;

S44: receiving four wheel speed information through CAN;

S45: Calculate the positions of the four BLE positioning nodes and the tire pressure monitoring module relative to the center of the corresponding wheel hub;

S46: Calculate the position of the smart key relative to the vehicle according to the position of the four BLE positioning nodes and the tire pressure monitoring module relative to the center of the corresponding hub, AOA, RSSI and other information;

S47: According to the stored calibration data, it is judged that the smart key is within the PS area, if yes, then enter step S48; if not, then return to step S40 after sleeping for 0.1 second;

S48: Send an engine start command through CAN, and the vehicle starts the engine.

As shown in Figure 9, to obtain tire pressure information, the process is as follows;

S50: The digital key master node controller obtains the wheel speed signal of the wheel through the CAN interface, and calculates the vehicle speed through the wheel speed signal;

S51: Determine whether the vehicle speed is greater than 10KM/h, if yes, enter step S52, if not, return to step S50;

S52: Low frequency wakes up the BLE positioning node and tire pressure monitoring module;

S53: Receive the tire pressure information uploaded by the BLE positioning node and the tire pressure monitoring module;

S54: Send the tire pressure information to the car machine through CAN.

In this embodiment, a vehicle adopts the smart key entry and start device integrated with tire pressure monitoring as described in this embodiment.

The above-mentioned embodiment is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited by the above-mentioned embodiment, and any other changes, modifications, substitutions, combinations, Simplifications should be equivalent replacement methods, and all are included in the protection scope of the present invention.

Claims (10)

1. A smart key entry and start device integrating tire pressure monitoring, characterized in that: it includes a digital key master node controller, and four BLE positioning nodes and tire pressure monitoring modules that establish communication connections with the digital key master node controller, Four BLE positioning nodes and tire pressure monitoring modules are respectively installed at the valves of the four hubs; The BLE positioning node and the tire pressure monitoring module are used to output tire pressure information, acceleration information, and receive RSSI and AOA information of the smart key, and send the tire pressure information, acceleration information and the RSSI and AOA information of the smart key to the digital Key master node controller; The digital key master node controller is used to send the tire pressure information to the car machine after receiving the information uploaded by the BLE positioning node and the tire pressure monitoring module; at the same time, it reads the wheel speed information, and calculates the BLE positioning node combined with the acceleration information and the position of the tire pressure monitoring module relative to the hub circle center, calculate the position of the smart key relative to the vehicle according to the position of the BLE positioning node and the tire pressure monitoring module relative to the hub circle center; and judge whether the smart key is in the welcome area, Which area in the PE area or PS area and take corresponding actions. 2. The smart key entry and starting device with integrated tire pressure monitoring according to claim 1, characterized in that: calculating the position of the BLE positioning node and the tire pressure monitoring module relative to the hub circle center, specifically: ∂=arcsin [(A _c +A _v )/g] A _v =V ² /R; Among them, ∂ is the angle between the BLE positioning node and the tire pressure monitoring module and the horizontal line, and the value range is [0, 2Π); A _c is the measured value of the acceleration sensor in the BLE positioning node and the tire pressure monitoring module; Av is the tire rotation time The centrifugal acceleration brought; g is the acceleration of gravity; V is the wheel speed; R is the radius of the acceleration sensor in the BLE positioning node and the tire pressure monitoring module relative to the hub circle center; The ∂ calculated by the formula has two values, and then the specific value of ∂ is determined by the change trend of A _c and the forward and reverse of the wheel speed. 3. The smart key entry and start device with integrated tire pressure monitoring according to claim 1 or 2, characterized in that: the digital key master node controller is used to send a wake-up signal to the BLE positioning node and the tire pressure monitoring module; The BLE positioning node and tire pressure monitoring module output tire pressure information and acceleration information after being awakened by the wake-up signal. 4. The smart key entry and start device with integrated tire pressure monitoring according to claim 1 or 2, characterized in that: the BLE positioning node and the tire pressure monitoring module include a battery, the tire pressure monitoring chip ASIC connected to the battery, and The first low-power Bluetooth SOC connected to the tire pressure monitoring chip ASIC, the low-frequency signal receiving coil connected to the tire pressure monitoring chip ASIC, and the first antenna connected to the first low-power Bluetooth SOC; The battery is used to provide energy; The tire pressure monitoring chip ASIC can be awakened by a low-frequency signal, and automatically calculates the tire pressure information and simultaneously gives the acceleration information after being awakened; The first low-power bluetooth SOC and the first antenna are used to realize two-way communication with the master node controller of the smart key and the digital key. 5. The smart key entry and start device integrated with tire pressure monitoring according to claim 1 or 2, characterized in that: the digital key master node controller includes an MCU controller, a power management unit connected to the MCU controller, A CAN interface, a low-frequency base station, a second low-power Bluetooth SOC, a low-frequency transmitting coil connected to the low-frequency base station, and a second antenna connected to the second low-power Bluetooth SOC; The power management unit is used to convert the constant power into the power required by the master node controller of the digital key; The CAN interface is used to realize two-way communication with the vehicle; The MCU controller is used to process data; The low-frequency base station and the low-frequency transmitting coil are used to wake up the physical interface of the BLE positioning node and the tire pressure monitoring module; The second low-power Bluetooth SOC and the second antenna are used to realize two-way communication with the smart key, the BLE positioning node and the tire pressure monitoring module. 6. A control method for a smart key entry and start device with integrated tire pressure monitoring, characterized in that: using the smart key entry and start device with integrated tire pressure monitoring as described in any one of claims 1 to 5, the control method includes the following step: When the BLE positioning node and the tire pressure monitoring module are in the working mode, the BLE positioning node and the tire pressure monitoring module output tire pressure information and acceleration information; at the same time, the BLE positioning node and the tire pressure monitoring module scan the smart key and establish a connection to obtain the information of the smart key. RSSI, AOA information, and send tire pressure information, acceleration information and RSSI, AOA information of the smart key to the digital key master node controller; After receiving the information uploaded by the BLE positioning node and the tire pressure monitoring module, the digital key master node controller sends the tire pressure information to the vehicle terminal for display; at the same time, it reads the wheel speed information, and calculates the BLE information in combination with the acceleration information. Based on the location of the positioning node and the tire pressure monitoring module relative to the center of the wheel hub, calculate the position of the smart key relative to the vehicle based on the position of the BLE positioning node and the tire pressure monitoring module relative to the center of the wheel hub; area, PE area, and PS area and take corresponding actions. 7. The method for controlling the entry and start device of the smart key integrated with tire pressure monitoring according to claim 6, characterized in that: the digital key master node controller periodically monitors whether the smart key enters the welcome area; If it is detected that the smart key enters the welcome area and the vehicle has not made a welcome action within the preset time, the vehicle will be notified to make a welcome action. 8. The control method for the smart key entry and start device integrated with tire pressure monitoring according to claim 7, characterized in that: in response to detecting that the PE button is triggered and the smart key is in the PE area, the key is sent to the car machine Valid command, the vehicle is unlocked. 9. The method for controlling the entry and start device of the smart key integrated with tire pressure monitoring according to claim 8, characterized in that: in response to the detection of the engine start command, and the smart key is within the range of the PS area, the key valid command is sent, The vehicle starts the engine. 10. A vehicle, characterized in that the smart key entry and start device integrated with tire pressure monitoring according to any one of claims 1 to 5 is adopted.

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