CN113212077A

CN113212077A - Vehicle tire parameter monitoring method and system

Info

Publication number: CN113212077A
Application number: CN202110664699.1A
Authority: CN
Inventors: 刘均; 李�瑞
Original assignee: Shenzhen Yuanzheng Future Automobile Technology Co ltd
Current assignee: Shenzhen Launch Technology Co Ltd
Priority date: 2021-06-15
Filing date: 2021-06-15
Publication date: 2021-08-06

Abstract

The application relates to a vehicle tire parameter monitoring method and a vehicle tire parameter monitoring system, wherein the method is applied to vehicle-mounted equipment, the vehicle-mounted equipment is in communication connection with a vehicle tire pressure sensor, the vehicle-mounted equipment is connected with a vehicle Control Area Network (CAN) bus, and the method comprises the following steps: acquiring vehicle state information through a vehicle CAN bus, wherein the vehicle state information comprises vehicle speed information; determining a target speed interval where the vehicle is located according to the vehicle speed information and a preset speed interval range; determining a tire parameter target monitoring frequency corresponding to the target speed interval; sending a vehicle tire parameter monitoring instruction to the vehicle tire pressure sensor according to the tire parameter target monitoring frequency so that the vehicle tire pressure sensor collects vehicle tire parameters according to the tire parameter target monitoring frequency and generates a tire parameter monitoring result; and acquiring and displaying the tire parameter monitoring result. The loss of the sensor battery is reduced, and the cost is saved.

Description

Vehicle tire parameter monitoring method and system

Technical Field

The application relates to the technical field of electronic circuits, in particular to a vehicle tire parameter monitoring method and system.

Background

The Tire Pressure Monitoring System (TPMS) is an automobile active safety System that uses wireless transmission technology, collects data such as automobile Tire Pressure and temperature in a driving or stationary state by using a high-sensitivity micro wireless sensing device fixed in an automobile Tire, transmits the data to a host in a cab, displays related data such as automobile Tire Pressure and temperature in a digital form in real time, and reminds a driver to perform early warning in the form of buzzing or voice when the Tire is abnormal (preventing Tire burst). Therefore, the pressure and the temperature of the tire are maintained in the standard range, the probability of tire burst and tire damage is reduced, and the oil consumption and the damage of vehicle components are reduced.

Current TPMS systems are classified into indirect TPMS systems and direct TPMS systems. The indirect TPMS compares the difference in rotational speed between tires by a wheel speed sensor of an Anti-lock Braking System (ABS) of the vehicle, and monitors the tire pressure by algorithms such as an effective rolling radius. The indirect TPMS system has low cost, but when the speed of two tires on the same side or opposite corners is too low to simultaneously monitor the tire pressure and exceeds 100Km/h, the system cannot monitor the tire pressure. The direct TPMS system measures pressure and temperature using a wireless sensor module installed inside each tire, and transmits the measured pressure and temperature to a monitoring and receiving device through a wireless radio frequency chip. The sensor installed in the tire is basically a button battery, and the direct TPMS system can periodically monitor the tire pressure after the vehicle is started, so that the power consumption of the sensor is large, and the service life of the sensor is shortened.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, the present application aims to provide a vehicle tire monitoring method and system, which aims to solve the problems of large power consumption and short service life of a sensor.

In a first aspect, an embodiment of the present application provides a vehicle tire parameter monitoring method, where the method is applied to an on-board device, the on-board device is connected in communication with a vehicle tire pressure sensor, and the on-board device is connected with a vehicle CAN bus, and the method includes:

acquiring vehicle state information through a CAN bus, wherein the vehicle state information comprises vehicle speed information;

determining a target speed interval where the vehicle is located according to the vehicle speed information and a preset speed interval range;

determining a tire parameter target monitoring frequency corresponding to the target speed interval;

sending a vehicle tire parameter monitoring instruction to the vehicle tire pressure sensor according to the target monitoring frequency so that the vehicle tire pressure sensor collects vehicle tire parameters according to the target monitoring frequency and generates a tire parameter monitoring result;

and acquiring and displaying the tire parameter monitoring result.

In the embodiment of the application, the vehicle speed information of a vehicle is acquired through the CAN bus, the target monitoring frequency of the tire parameter is determined according to the vehicle speed information of the vehicle, and the vehicle tire parameter monitoring instruction is sent to the vehicle tire pressure sensor at the target monitoring frequency, so that the vehicle tire pressure sensor acquires the vehicle tire parameter according to the target monitoring frequency. When the vehicle runs at a low speed, the monitoring frequency of the parameters of the vehicle tires is reduced, the working frequency of the sensor is reduced, the loss of the battery of the sensor is reduced, and the cost is saved.

In a possible implementation manner of the first aspect, the preset speed interval range includes 0, a first speed interval, and a second speed interval, and any speed value of the second speed interval is greater than any speed value of the first speed interval;

the determining the target speed interval where the vehicle is located specifically includes:

extracting a speed value of the vehicle speed information;

when the speed value is 0, determining that a target speed interval where the vehicle is located is 0;

when the speed value is in a first speed interval, determining that a target speed interval in which the vehicle is located is the first speed interval;

and when the speed value is in a second speed interval, determining that the target speed interval in which the vehicle is positioned is the second speed interval.

In a possible implementation manner of the first aspect, the determining a tire parameter target monitoring frequency corresponding to the target speed interval specifically includes:

when the target speed interval where the vehicle is located is 0, determining that the corresponding tire parameter target monitoring frequency is 0;

when the target speed interval where the vehicle is located is a first speed interval, determining the corresponding tire parameter target monitoring frequency as a first frequency;

and when the target speed interval in which the vehicle is positioned is a second speed interval, determining that the corresponding tire parameter target monitoring frequency is a second frequency, wherein the second frequency is higher than the first frequency.

In the embodiment of the application, the frequency of monitoring the tire parameters can be controlled according to the running speed of the vehicle, and the target monitoring frequency is higher for the speed interval with the higher speed value of the vehicle. Under the condition that the vehicle is in a parking state, stopping sending a vehicle tire parameter monitoring instruction to a vehicle tire pressure sensor; under the condition that the vehicle runs at a low speed, the tire parameters do not need to be monitored frequently, the safety and effectiveness of tire parameter monitoring are ensured, and meanwhile, the consumption of the vehicle-mounted equipment and the vehicle tire pressure sensor in the process of monitoring the tire parameters is reduced.

In one possible embodiment of the first aspect, the number of the vehicle tire pressure sensors is at least 1; the method comprises the following steps of sending a vehicle tire parameter monitoring instruction to a vehicle tire pressure sensor according to the target monitoring frequency so as to enable the vehicle tire pressure sensor to acquire vehicle tire parameters and generate a tire parameter monitoring result according to the tire parameter target monitoring frequency, and acquiring and displaying the tire parameter monitoring result, wherein the method specifically comprises the following steps:

determining that any one vehicle tire pressure sensor is a first vehicle tire pressure sensor;

sending a vehicle tire parameter monitoring instruction to the first vehicle tire pressure sensor according to the target tire parameter monitoring frequency so that the first vehicle tire pressure sensor acquires corresponding tire parameters and generates a tire parameter monitoring result;

receiving a tire parameter monitoring result fed back by the first vehicle tire pressure sensor;

judging whether a vehicle tire pressure sensor which does not feed back the monitoring result of the tire parameter exists in a monitoring period;

if yes, sequentially sending vehicle tire parameter monitoring instructions to the vehicle tire pressure sensors which do not feed back the tire parameter monitoring results and receiving the tire parameter monitoring results.

In the embodiment of the application, a vehicle tire parameter monitoring instruction is sequentially sent to each vehicle tire pressure sensor of a vehicle in one monitoring period, and a tire parameter monitoring result returned by each vehicle tire pressure sensor is received. Because the communication can be carried out with only one vehicle tire pressure sensor at the same time, the problem of communication conflict caused by the fact that a plurality of vehicle tire pressure sensors simultaneously transmit data in the traditional TPMS is avoided.

In one possible implementation of the first aspect, the method further comprises:

determining the length of a data frame of the tire parameter monitoring result;

judging whether the length of the data frame exceeds a preset threshold value or not;

if not, determining that the tire parameter monitoring result is normal;

if so, further judging whether the monitoring data in the tire parameter monitoring result exceeds a preset control range;

and if the monitoring data exceed the preset control range, updating the tire parameter target monitoring frequency to be a second target monitoring frequency, and sending a vehicle tire parameter monitoring instruction to the first vehicle tire pressure sensor according to the second target monitoring frequency to obtain a tire parameter monitoring result.

In the embodiment of the application, the second target monitoring frequency is greater than the tire parameter target monitoring frequency, so that the frequency of monitoring the vehicle tire parameters is increased under the condition that the tire parameter monitoring result is abnormal, and the safety and effectiveness of monitoring the vehicle tire parameters are ensured.

In a second aspect, the present application provides a vehicle tire parameter monitoring method, which is applied to a vehicle tire pressure sensor, where the vehicle tire pressure sensor is connected in communication with an on-board device, and the on-board device is connected to a vehicle CAN bus, and the method includes:

receiving a vehicle tire parameter monitoring instruction sent by the vehicle-mounted equipment according to the tire parameter target monitoring frequency;

collecting vehicle tire parameters according to the vehicle tire parameter monitoring instruction;

generating a tire parameter monitoring result according to the collected vehicle tire parameters;

and sending the tire parameter monitoring result to the vehicle-mounted equipment.

In the embodiment of the application, the vehicle tire pressure sensor is awakened after receiving a vehicle tire parameter monitoring instruction sent by the vehicle-mounted equipment, the sleep power saving mode is converted into the working mode, the corresponding tire parameters are collected, a tire parameter monitoring result is generated, and the generated tire parameter monitoring result is returned to the vehicle-mounted equipment. The vehicle tire pressure sensor is in a sleep power-saving mode under the condition that the vehicle tire parameter monitoring instruction sent by the vehicle-mounted equipment is not received, so that the battery consumption of the vehicle tire pressure sensor is reduced, and the cost is saved.

In a possible implementation manner of the second aspect, the generating tire parameter monitoring results according to the collected vehicle tire parameters specifically includes:

preprocessing the vehicle tire parameters to obtain processed data;

judging whether the processing data exceeds a preset control range or not;

if the processed data exceeds a preset control range, packaging the identification of the vehicle tire pressure sensor and the processed data to generate a tire parameter monitoring result;

if the processed data does not exceed the preset control range, further judging whether the time interval between the current time and the last time of feeding back the tire parameter monitoring result reaches a preset period or not,

if the preset period is not reached, packaging the identifier of the vehicle tire pressure sensor to generate a tire parameter monitoring result;

and if the preset period is reached, packaging the identification of the vehicle tire pressure sensor and the processed data to generate a tire parameter monitoring result.

In the embodiment of the application, when the processing data exceeds a preset control range or the time interval between the current time and the last time of feeding back the tire parameter monitoring result reaches a preset period, the vehicle tire pressure sensor sends the identification of the vehicle tire pressure sensor and the processing data to the vehicle-mounted equipment; and under the condition that the processing data does not exceed the preset control range and the time interval between the current time and the last time of feeding back the tire parameter monitoring result does not reach the preset period, the vehicle tire pressure sensor sends the identifier of the vehicle tire pressure sensor to the vehicle-mounted equipment. The data processing method does not need to send processing data to the vehicle-mounted equipment every time of detection, ensures the safety and effectiveness of tire pressure monitoring, and reduces the power consumption of the vehicle tire pressure sensor when sending the processing data

In a third aspect, an embodiment of the present application provides a vehicle tire parameter monitoring apparatus, where the apparatus is applied to an on-board device, the on-board device is connected to a vehicle tire pressure sensor in a communication manner, and the on-board device is connected to a vehicle control area network CAN bus, and the apparatus includes:

the device comprises a first acquisition unit, a second acquisition unit and a control unit, wherein the first acquisition unit is used for acquiring vehicle state information through a vehicle CAN bus, and the vehicle state information comprises vehicle speed information;

the first determining unit is used for determining a target speed interval where the vehicle is located according to the vehicle speed information and a preset speed interval range;

the second determining unit is used for determining the tire parameter target monitoring frequency corresponding to the target speed interval;

the first communication unit is used for sending a vehicle tire parameter monitoring instruction to the vehicle tire pressure sensor according to the tire parameter target monitoring frequency so that the vehicle tire pressure sensor collects vehicle tire parameters according to the tire parameter target monitoring frequency and generates a tire parameter monitoring result;

the first communication unit is further used for acquiring and displaying the tire parameter monitoring result.

In a fourth aspect, the present application provides a vehicle tire parameter monitoring device, where the device is applied to a vehicle tire pressure sensor, the vehicle tire pressure sensor is in communication connection with an on-board device, the on-board device is connected with a vehicle CAN bus, and the device includes:

the second communication unit is used for receiving a vehicle tire parameter monitoring instruction sent by the vehicle-mounted equipment according to the tire parameter target monitoring frequency;

the acquisition unit is used for acquiring vehicle tire parameters according to the vehicle tire parameter monitoring instruction;

the generating unit is used for generating a tire parameter monitoring result according to the collected vehicle tire parameters;

and the second communication unit is also used for sending the tire parameter monitoring result to the vehicle-mounted equipment.

In a fifth aspect, an embodiment of the present application provides an in-vehicle device, including a processor and a memory, where the memory is used to store one or more programs, where the one or more programs are configured to be executed by the processor, and the program includes instructions for performing some or all of the steps described in the first aspect of the embodiment of the present application.

In a sixth aspect, embodiments of the present application provide a vehicle tire pressure sensor comprising a processor and a memory for storing one or more programs configured to be executed by the processor, the programs comprising instructions for performing some or all of the steps as described in the second aspect of embodiments of the present application.

In a seventh aspect, embodiments of the present application provide a vehicle tire parameter monitoring system, including: the vehicle-mounted equipment comprises vehicle tire pressure sensors and a vehicle CAN bus; the vehicle-mounted equipment is in communication connection with the vehicle tire pressure sensor and is connected with a vehicle CAN bus;

an in-vehicle device comprising a processor and a memory for storing one or more programs configured for execution by the processor, the programs comprising instructions for performing some or all of the steps as described in the first aspect of embodiments of the present application;

a vehicle tire pressure sensor comprising a processor and a memory for storing one or more programs configured for execution by the processor, the programs comprising instructions for carrying out some or all of the steps as described in the second aspect of the embodiments of the present application.

In an eighth aspect, embodiments of the present application provide a computer-readable storage medium storing a computer program comprising program instructions that, when executed by a processor, cause the processor to perform some or all of the steps as described in the first aspect of embodiments of the present application.

Drawings

Fig. 1 is a schematic structural diagram of a TPMS system according to an embodiment of the present disclosure;

FIG. 2 is a schematic flow chart of a method for monitoring vehicle tire parameters according to an embodiment of the present disclosure;

FIG. 3 is a schematic flow chart diagram illustrating another method for monitoring vehicle tire parameters according to an embodiment of the present application;

FIG. 4 is a schematic flow chart diagram illustrating another method for monitoring vehicle tire parameters according to an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a vehicle tire parameter monitoring device according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of another vehicle tire parameter monitoring device provided in the embodiments of the present application;

FIG. 7 is a schematic structural diagram of a vehicle tire parameter monitoring system according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of an in-vehicle device according to an embodiment of the present disclosure;

fig. 9 is a schematic structural diagram of a vehicle tire pressure sensor according to an embodiment of the present application.

Detailed Description

To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are given in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

The terms "first," "second," and the like in the description and claims of the present application and in the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

Current TPMS systems are classified into indirect pressure monitoring systems and direct pressure monitoring systems. The indirect pressure monitoring system compares the rotating speed difference between the tires through a wheel speed sensor of the ABS of the automobile and monitors the tire pressure through algorithms such as effective rolling radius and the like. The indirect pressure monitoring system has low cost, but when the speed of two tires on the same side or opposite corners is too low to exceed 100Km/h, the system cannot judge. The direct tire pressure monitoring system measures pressure and temperature by using a wireless sensor module installed inside each tire, encodes the measured results, and transmits the encoded results to a monitoring receiving device through a wireless radio frequency chip. The monitoring device is typically mounted in a place that is easily visible to the driver. The internal pressure value, temperature value, battery voltage and sensor work are displayed. When the pressure of the tire is higher than 25% of the standard pressure or the pressure of the tire is lower than 12.5% of the standard pressure, the temperature is higher than 85 ℃, and the tire leaks air rapidly (the pressure per minute drops by more than 0.2Bar), the TPMS can automatically send out alarm information, a sound system is started to alarm, the position of the failed tire is judged, and meanwhile, the pressure value is displayed on a display screen in a flashing manner.

The positions of 4 wireless sensor modules on a vehicle are already set when a traditional direct TPMS system leaves a factory, and the traditional direct TPMS system cannot be installed wrongly. Each sensor module actively transmits the tire pressure information at regular time. A drawback of this system is that the sensor module position must be reset after the tire is indexed. In an LF low-frequency interface system, after TPMS is installed for the first time or tires are transposed, the TPMS can automatically identify the position of a sensor module, and the intelligence level of the system is improved.

The conventional direct type TPMS monitors the tire pressure periodically during the use process of a vehicle, and because the sensors arranged in the tires basically use button batteries, the service life of the sensors is greatly shortened.

Based on this, the present application intends to provide a solution to the above technical problem, the details of which will be explained in the following embodiments.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a TPMS system according to an embodiment of the present disclosure. As shown in fig. 1, the TPMS system includes an in-vehicle device 110, a vehicle tire pressure sensor 120, and a vehicle CAN bus 130.

In this embodiment, the vehicle-mounted device 110 may access a Controller Area Network (CAN) bus 130 of the vehicle, and may obtain information such as a vehicle speed and an ambient temperature through the CAN bus 130 of the vehicle. The vehicle-mounted device 110 can also be connected to a micro cOS-II system of the single chip microcomputer, and the using condition of the vehicle can be judged in real time through the micro cOS-II system of the single chip microcomputer. The mu cOS-II system is a preemptive multitask real-time operating system based on priority, and comprises functions of real-time kernel, task management, time management, communication synchronization (semaphore, mailbox, message queue) among tasks, memory management and the like. The vehicle tire pressure sensor 120 may be provided in plural numbers, respectively corresponding to tires of the vehicle, and the plural vehicle tire pressure sensors may be respectively mounted on the plural tires of the vehicle. The vehicle-mounted device 110 includes a plurality of low frequency communication modules 111 and a high frequency receiving module 112, wherein the low frequency communication modules 111 may correspond to the vehicle tire pressure sensors, and each low frequency communication module 111 may communicate with the corresponding vehicle tire pressure sensor, and in order to ensure normal communication between the vehicle-mounted device 110 and the vehicle tire pressure sensor 120, each low frequency communication module 111 may be installed near the corresponding vehicle tire pressure sensor. In order to save cost, the in-vehicle device 110 may control the plurality of low frequency communication modules 111 through an RS232 bus. The in-vehicle device 110 accesses the vehicle CAN bus 130, and may obtain vehicle status information, which may include vehicle speed information, from a node on the vehicle CAN bus 130. The vehicle-mounted device 110 determines a target speed interval where the vehicle is located according to the acquired vehicle speed information and a preset speed interval range, and determines a tire parameter monitoring frequency corresponding to the target speed interval. The vehicle-mounted device 110 may send a vehicle tire parameter monitoring instruction to the vehicle tire pressure sensor 120 through the low frequency communication module according to the target monitoring frequency, so that the vehicle tire pressure sensor 120 acquires a tire parameter of a corresponding tire according to the target monitoring frequency.

The vehicle tire pressure sensor 120 includes a low frequency communication interface 121 and a high frequency communication interface 122. The vehicle tire pressure sensor 120 receives a vehicle tire parameter monitoring instruction sent by the vehicle-mounted device 110 through the low-frequency communication interface 121, and the vehicle tire pressure sensor 120 starts to acquire tire parameters of a corresponding tire after receiving the vehicle tire parameter monitoring instruction sent by the vehicle-mounted device 110, so as to obtain a monitoring result, where the tire parameters may include pressure and temperature of the tire and battery voltage of the sensor. The vehicle tire pressure sensor 120 performs manchester encoding on the monitoring result and transmits the result to the vehicle-mounted device 110 through the high-frequency communication interface 122. The vehicle-mounted device 110 receives the monitoring result sent by the vehicle tire pressure sensor 120 through the high-frequency receiving module 112, processes the monitoring result to obtain a tire parameter, and outputs an alarm signal to start an alarm when the tire parameter is abnormal, such as the pressure or temperature of the tire exceeds a control range. Meanwhile, the vehicle-mounted device 110 displays the obtained tire parameters.

In the embodiment of the application, the vehicle-mounted equipment can control the low-frequency communication module to send the vehicle tire parameter monitoring instruction to the vehicle tire pressure sensor through the RS232 bus, and the vehicle tire pressure sensor receives the detection instruction through the low-frequency communication interface and sends the monitoring result to the vehicle-mounted equipment through the high-frequency communication interface. The vehicle-mounted equipment can also set parameters of the vehicle tire pressure sensor, inform the vehicle tire pressure sensor to collect and send tire parameters of the tire, and realize bidirectional information exchange between the vehicle-mounted equipment and the vehicle tire pressure sensor. The vehicle-mounted equipment can independently start each vehicle tire pressure sensor and receive the detection result returned by the single vehicle tire pressure sensor. When a certain vehicle tire pressure sensor transmits a fault, the vehicle-mounted equipment can immediately find the fault. The vehicle-mounted equipment can control the monitoring frequency of the parameters of the vehicle tire according to the vehicle speed information, when the vehicle runs at low speed, the monitoring frequency of the parameters of the vehicle tire is reduced, the working frequency of the tire pressure sensor of the vehicle is reduced, the loss of a battery of the tire pressure sensor of the vehicle is reduced, and the cost is saved.

Referring to fig. 2, fig. 2 is a schematic flow chart of a method for monitoring tire parameters of a vehicle according to an embodiment of the present disclosure. The vehicle tire parameter monitoring method is applied to vehicle-mounted equipment, the vehicle-mounted equipment is in communication connection with a vehicle tire pressure sensor, the vehicle-mounted equipment is connected with a vehicle CAN bus, and as shown in figure 2, the vehicle tire parameter monitoring method comprises the following steps.

Vehicle state information is acquired 201 through a vehicle CAN bus.

In the embodiment of the application, the vehicle-mounted equipment can be controlled by an embedded single chip microcomputer (STM32) and adopts a micro cOS-II real-time system technology. The vehicle CAN bus adopts a multi-master competition type bus structure and has the characteristics of serial bus running by multiple master stations and decentralized arbitration and broadcast communication. Any node on the vehicle CAN bus CAN actively send information to other nodes on the network at any time without primary and secondary, so that free communication CAN be realized among the nodes. The vehicle-mounted equipment is connected with the vehicle CAN bus, and vehicle state information is acquired through the vehicle CAN bus and comprises vehicle speed information.

And 202, determining a target speed interval where the vehicle is located according to the preset speed interval range according to the vehicle speed information.

Specifically, the speed is divided into different speed intervals according to the size of the speed value, and the different speed values correspond to the different speed intervals. The preset speed interval range comprises at least two speed intervals. After the vehicle-mounted equipment acquires the vehicle speed information, the vehicle speed value is acquired from the vehicle speed information, and the target speed interval where the vehicle is located is determined according to the speed interval to which the vehicle speed value belongs.

In one embodiment, the preset speed section range includes 0, a first speed section, and a second speed section, and any speed value of the second speed section is greater than any speed value of the first speed section. The method for determining the target speed interval of the vehicle includes the following specific steps:

(11) extracting a speed value of the vehicle speed information;

(12) when the speed value is 0, determining that a target speed interval where the vehicle is located is 0;

(13) when the speed value is in a first speed interval, determining that a target speed interval in which the vehicle is located is the first speed interval;

(14) and when the speed value is in a second speed interval, determining that the target speed interval in which the vehicle is positioned is the second speed interval.

Specifically, if the speed value of the vehicle is 0, which indicates that the vehicle is in a stopped state, it is determined that the target speed zone in which the vehicle is located is 0. The speed value of the vehicle in the first speed section indicates that the vehicle is in a low-speed running state, and if the vehicle is slowly running, the speed value of the vehicle in the first speed section determines that the target speed section in which the vehicle is located is the first speed section. The fact that the speed value of the vehicle is in the second speed section indicates that the vehicle is in a high-speed running state, and if the vehicle runs normally, the speed value of the vehicle is in the second speed section, and the target speed section where the vehicle is located is determined to be the second speed section. In order to ensure that any speed value of the vehicle can correspond to a corresponding speed section, the preset speed section range is continuous, that is, the above 0, the first speed section and the second speed section form a continuous speed range, the right end point of the first speed section is equal to the left end point of the second speed section, the first speed section includes the right end point, and the second speed section does not include the left end point. The first speed interval may specifically take a value of (0, 30), i.e., the speed values in the range of 0 to 30 km/h all belong to the first speed interval, and the second speed interval may specifically take a value of (30, + ∞), i.e., the speed values in the range of more than 30 km/h all belong to the second speed interval.

Further, the preset speed interval range may further include a third speed interval, and when the speed value is in the third speed interval, it is determined that the target speed interval in which the vehicle is located is the third speed interval, and any speed value in the third speed interval is greater than any speed value in the second speed interval.

In the embodiment of the application, the speed can be divided into 0, a first speed section, a second speed section and a third speed section according to the running speed of the vehicle in different running scenes, wherein 0 corresponds to a vehicle parking scene, the first speed section corresponds to a vehicle slow running scene, the second speed section corresponds to a normal running scene of the vehicle on an urban road, and the third speed section corresponds to a normal running scene of the vehicle on an expressway. The speed value of the vehicle is within 30 kilometers per hour under the condition of slow running of the vehicle, namely the value of a first speed interval is (0, 30), the speed of the vehicle is between 30 kilometers per hour and 60 kilometers per hour under the condition of normal running of the vehicle on an urban road, namely the value of a second speed interval is (30, 60), the speed value of the vehicle is between 60 kilometers per hour and 120 kilometers per hour under the condition of normal running of the vehicle on an expressway, and the value of a third speed interval is (60, 120).

And 203, determining a tire parameter target monitoring frequency corresponding to the target speed interval.

Specifically, different speed intervals correspond to different monitoring frequencies, and after a target speed interval corresponding to the speed information of the vehicle is determined, a tire parameter target monitoring frequency corresponding to the target speed interval is determined according to the corresponding relation between a speed interval set and a monitoring frequency set. The speed interval set comprises at least two speed intervals, the monitoring frequency set comprises at least two monitoring frequencies, and mapping from the at least two monitoring frequencies to speed values of the at least two speed intervals is a monotone increasing function.

The corresponding relationship between the speed interval set and the monitoring frequency set may be pre-stored in a non-volatile memory of the vehicle-mounted device, and when step 203 needs to be executed, the vehicle-mounted device may obtain the corresponding relationship between the speed interval set and the monitoring frequency set from the non-volatile memory, and obtain the target monitoring frequency corresponding to the target speed interval according to the corresponding relationship between the speed interval set and the monitoring frequency set. The set of speed intervals to the set of monitoring frequencies may be stored in a non-volatile memory in the form of a mapping table.

In an embodiment, the determining the tire parameter target monitoring frequency corresponding to the target speed interval may specifically include:

(21) when the target speed interval where the vehicle is located is 0, determining that the corresponding tire parameter target monitoring frequency is 0;

(22) when the target speed interval where the vehicle is located is a first speed interval, determining the corresponding tire parameter target monitoring frequency as a first frequency;

(23) and when the target speed interval in which the vehicle is positioned is a second speed interval, determining that the corresponding tire parameter target monitoring frequency is a second frequency, wherein the second frequency is higher than the first frequency.

Specifically, the speed interval set comprises 0, a first speed interval and a second speed interval, and the monitoring frequency set comprises 0, a first frequency and a second frequency. 0 in the set of speed intervals corresponds to 0 in the set of monitoring frequencies, a first speed interval in the set of speed intervals corresponds to a first frequency in the set of monitoring frequencies, and a second speed interval in the set of speed intervals corresponds to a second frequency in the set of monitoring frequencies. Any speed value in the second speed interval is larger than any speed value in the first speed interval, and the second frequency is higher than the first frequency. When the speed interval of the speed value of the vehicle is 0, determining that the corresponding tire parameter target monitoring frequency is 0; when the speed interval in which the speed value of the vehicle is located is a first speed interval, determining the corresponding tire parameter target frequency as a first frequency; and when the target speed interval in which the vehicle is located is a second speed interval, determining the corresponding tire parameter target monitoring frequency as a second frequency.

And 204, sending a vehicle tire parameter monitoring command to the vehicle tire pressure sensor according to the target monitoring frequency.

Specifically, the vehicle-mounted equipment comprises a low-frequency communication module, and the vehicle-mounted equipment sends a vehicle tire parameter monitoring instruction to a vehicle tire pressure sensor through the low-frequency communication module. The vehicle tire parameter monitoring instruction is used for enabling a vehicle tire pressure sensor to acquire vehicle tire parameters, generating a tire parameter monitoring result and returning the vehicle tire parameter monitoring result to the vehicle-mounted equipment. The vehicle tire parameters collected by the vehicle tire pressure sensor may include the pressure, temperature of the tire, and battery voltage of the vehicle tire pressure sensor.

And 205, acquiring and displaying the tire parameter monitoring result.

Specifically, the vehicle-mounted device may include a high-frequency receiving module, and the vehicle-mounted device receives the monitoring result sent by the vehicle tire pressure sensor through the high-frequency receiving module, and processes the monitoring result to obtain the tire parameter. The vehicle-mounted equipment can display the processed tire parameters through an instrument panel.

In the embodiment of the application, the vehicle speed information of a vehicle is acquired through a vehicle CAN bus, the target monitoring frequency of the tire parameter is determined according to the vehicle speed information of the vehicle, and the vehicle tire parameter monitoring instruction is sent to the vehicle tire pressure sensor at the target monitoring frequency, so that the vehicle tire pressure sensor acquires the vehicle tire parameter according to the target monitoring frequency. When the vehicle runs at a low speed, the monitoring frequency of the parameters of the vehicle tires is reduced, the working frequency of the sensor is reduced, the loss of the battery of the sensor is reduced, and the cost is saved.

Referring to fig. 3, fig. 3 is a schematic flow chart of another method for monitoring tire parameters of a vehicle according to an embodiment of the present disclosure. The vehicle tire parameter monitoring method is applied to vehicle-mounted equipment, the vehicle-mounted equipment is in communication connection with a vehicle tire pressure sensor, the vehicle-mounted equipment is connected with a vehicle CAN bus, and as shown in figure 3, the vehicle tire parameter monitoring method comprises the following steps.

301, vehicle state information is obtained through a vehicle CAN bus, and the vehicle state information includes vehicle speed information.

The specific implementation of step 301 may refer to the specific description of step 201 shown in fig. 2, and is not described herein again.

And 302, determining a target speed interval where the vehicle is located according to the preset speed interval range according to the vehicle speed information.

The specific implementation of step 302 may refer to the specific description of step 202 shown in fig. 2, and is not described herein again.

303, determining a tire parameter target monitoring frequency corresponding to the target speed interval.

The specific implementation of step 303 may refer to the specific description of step 203 shown in fig. 2, and is not described herein again.

And 304, determining any vehicle tire pressure sensor to be a first vehicle tire pressure sensor.

Specifically, the number of the vehicle tire pressure sensors is at least 1, that is, a plurality of vehicle tire pressure sensors can be mounted on the vehicle, and the vehicle tire pressure sensors correspond to a plurality of tires of the vehicle respectively. A plurality of vehicle tire pressure sensors on the vehicle are provided with corresponding identifications so that the vehicle-mounted equipment can distinguish the vehicle tire pressure sensors. After receiving the vehicle tire parameter monitoring instruction, each vehicle tire pressure sensor respectively collects the tire parameters of the corresponding tire, generates a tire parameter monitoring result, and the tire parameter monitoring result comprises the identification of the vehicle tire pressure sensor and is fed back to the vehicle-mounted equipment. After the vehicle-mounted equipment receives the tire parameter monitoring result, each vehicle tire pressure sensor can be identified according to the identifier of the vehicle tire pressure sensor in the tire parameter monitoring result. And determining any one of the plurality of vehicle tire pressure sensors as a first vehicle tire pressure sensor.

And 305, sending a vehicle tire parameter monitoring instruction to the first vehicle tire pressure sensor according to the target tire parameter monitoring frequency.

Specifically, the vehicle-mounted equipment comprises a low-frequency communication module, and the vehicle-mounted equipment can send a vehicle tire parameter monitoring instruction to the first vehicle tire pressure sensor through the low-frequency communication module, so that the first vehicle tire pressure sensor acquires tire parameters of corresponding tires, generates a tire parameter monitoring result, and returns the tire parameter monitoring result to the vehicle-mounted equipment.

And 306, receiving the tire parameter monitoring result fed back by the first vehicle tire pressure sensor.

The specific implementation of step 306 may refer to the specific description of step 205 shown in fig. 2, and is not described herein again.

307, judging whether a vehicle tire pressure sensor which does not feed back the monitoring result of the tire parameter exists in one monitoring period.

Specifically, the monitoring period corresponds to the target tire parameter monitoring frequency, i.e., the product of the monitoring period and the target tire parameter monitoring frequency is 1. The vehicle-mounted equipment sequentially sends vehicle tire parameter monitoring instructions to each vehicle tire pressure sensor on the vehicle in a monitoring period and receives tire parameter monitoring results fed back by each vehicle tire pressure sensor. The vehicle-mounted equipment firstly sends a vehicle tire parameter monitoring instruction to the first vehicle tire pressure sensor and receives a tire parameter monitoring result fed back by the first tire pressure sensor, and then determines whether the vehicle tire pressure sensor which does not feed back the tire parameter monitoring result exists in a monitoring period.

And 308, if so, sequentially sending vehicle tire parameter monitoring instructions to the vehicle tire pressure sensors which do not feed back the tire parameter monitoring results and receiving the tire parameter monitoring results.

Specifically, if a vehicle tire pressure sensor which does not feed back the tire parameter monitoring result exists in a monitoring period, a vehicle tire parameter monitoring instruction is sequentially sent to the vehicle tire pressure sensor which feeds back the tire parameter monitoring result, and the tire parameter monitoring result fed back by the vehicle tire pressure sensor is received.

309, a data frame length of the tire parameter monitoring result is determined.

In this embodiment of the application, in a normal situation, the pressure and the temperature of the tire and the battery voltage of the first vehicle tire pressure sensor do not change greatly, so that in order to reduce power consumption when the first vehicle tire pressure sensor transmits monitoring data, under the condition that the acquired monitoring data is normal, a monitoring data transmission time is set, the acquired monitoring data and the identifier of the first vehicle tire pressure sensor are encapsulated only when the monitoring data transmission time is reached, a first-type tire parameter monitoring result is generated, and the generated first-type tire parameter monitoring result is returned to the vehicle-mounted device, where the monitoring data includes the pressure and the temperature of the tire and the battery voltage of the first vehicle tire pressure sensor, and the data frame length of the first-type tire parameter monitoring result is greater than a preset threshold value. And under the condition that the sending time of the monitoring data is not reached, the first vehicle tire pressure sensor packages the identifier of the first vehicle tire pressure sensor to generate a second type tire parameter monitoring result, the generated second type tire parameter monitoring result is returned to the vehicle-mounted equipment, and the length of the data frame of the second type tire parameter monitoring result is smaller than a preset threshold value. And under the condition that the acquired monitoring data are abnormal, the first vehicle tire pressure sensor packages the acquired monitoring data and the identifier of the first vehicle tire pressure sensor to generate a first type of tire parameter monitoring result, and the generated first type of tire parameter monitoring result is returned to the vehicle-mounted equipment. The preset threshold is a set frame length threshold, and the value of the preset threshold is between the length of the data frame of the first type of tire parameter monitoring result and the length of the data frame of the second type of tire parameter monitoring result.

And after the vehicle-mounted equipment receives the tire parameter monitoring result returned by the first vehicle tire pressure sensor, determining the length of a data frame of the tire parameter monitoring result. And the vehicle-mounted equipment determines whether the received tire parameter monitoring result is a first type of tire parameter monitoring result or a second type of tire parameter monitoring result according to the data frame length of the tire parameter monitoring result so as to correspondingly process the received tire parameter monitoring result.

310, judging whether the length of the data frame exceeds a preset threshold value;

and the vehicle-mounted equipment determines whether the received tire parameter monitoring result is a first type of tire parameter monitoring result or a second type of tire parameter monitoring result according to the data frame length of the tire parameter monitoring result so as to correspondingly process the received tire parameter monitoring result. If the data frame length of the tire parameter monitoring result does not exceed the preset threshold, the step 311 is executed; if the data frame length of the tire parameter monitoring result exceeds the preset threshold, the process proceeds to step 312.

And 311, determining that the tire parameter monitoring result is normal.

And under the condition that the data frame length of the tire parameter monitoring result is smaller than a preset threshold value, the tire parameter monitoring result received by the vehicle-mounted equipment is a second type of tire parameter monitoring result, and the first vehicle tire pressure sensor transmits the monitoring data to the vehicle-mounted equipment under the condition that the monitoring data is normal and the transmission time of the monitoring data is not reached, so that the received tire parameter monitoring result is normal.

312, determining whether the monitoring data in the monitoring result exceeds a preset control range.

Specifically, when the data frame length of the tire parameter monitoring result is greater than the preset threshold, it indicates that the tire parameter monitoring result received by the vehicle-mounted device is the first type of tire parameter monitoring result, and the first vehicle tire pressure sensor transmits the tire parameter monitoring result when the tire parameter is abnormal or the time of transmitting the tire parameter is reached, and therefore it is necessary to further determine whether the monitoring data in the monitoring result exceeds the preset control range to determine whether the received tire parameter monitoring result is normal.

The monitoring data comprises the pressure and the temperature of the tire and the battery voltage of the first vehicle tire pressure sensor, and whether the values of the pressure and the temperature of the tire and the battery voltage of the first vehicle tire pressure sensor are in a preset control range or not is judged respectively. The preset control range of the pressure of the tire is related to the specification of the tire, the tires of different specifications have different standard pressure values, and the preset control range of the pressure of the tire can be within a certain range of up-and-down fluctuation of the standard pressure values corresponding to the tire. When the pressure value of the tire is higher than the highest pressure threshold value or lower than the lowest pressure threshold value, the monitoring data is determined to exceed a preset control range. The maximum pressure threshold may be set to be 25% higher than the standard pressure value corresponding to the tire, and the minimum pressure threshold may be set to be 12.5% lower than the standard pressure value corresponding to the tire. When the temperature of the tire in the monitored data is higher than the temperature threshold value, it is determined that the monitored data exceeds a preset control range. The preset control range of the temperature of the tire may be related to the ambient temperature and the vehicle speed, and the temperature threshold may be relatively high in the case where the ambient temperature is high and the vehicle speed is fast. For example, in hot summer, when the temperature of the road surface reaches 70 degrees celsius, the temperature threshold value should be set above 70 degrees celsius, and the temperature threshold value may be specifically set between 90 degrees celsius and 100 degrees celsius. And when the battery voltage of the first vehicle tire pressure sensor in the monitoring data is lower than the voltage threshold value, determining that the monitoring data exceeds a preset control range. The voltage threshold value may be set according to a rated voltage of the battery of the first vehicle air pressure sensor, for example, the voltage threshold value is set to ten percent of the rated voltage of the battery of the first vehicle air pressure sensor, and the monitoring data is determined to exceed the preset control range when the voltage of the battery of the first vehicle air pressure sensor is lower than ten percent of the rated voltage.

313, if the monitoring data exceeds the preset control range, updating the tire parameter target monitoring frequency to be a second target monitoring frequency, and sending a vehicle tire parameter monitoring instruction to the first vehicle tire pressure sensor according to the second target monitoring frequency to obtain a monitoring result.

Specifically, the second target monitoring frequency is greater than the tire parameter target monitoring frequency. And if the monitoring data exceed the preset control range, indicating that the tire parameter monitoring result is abnormal. And under the condition that the tire parameter monitoring result is abnormal, replacing the tire parameter target monitoring frequency with a second target monitoring frequency, and sending a vehicle tire parameter monitoring instruction to the first vehicle tire pressure sensor according to the second target monitoring frequency so that the first vehicle tire pressure sensor acquires the corresponding tire parameter, generates a monitoring result, and returns the monitoring result to the vehicle-mounted equipment.

Further, the magnitude of the second target frequency may be related to the degree that the monitoring data exceeds the preset control range, that is, the higher the degree that the monitoring data exceeds the preset control range, the larger the value of the second target frequency is.

In the embodiment of the application, under the condition that the tire parameter monitoring result is abnormal, the frequency of monitoring the tire parameters of the vehicle is improved, and the safety and effectiveness of monitoring the tire parameters of the vehicle are ensured.

Referring to fig. 4, fig. 4 is a schematic flow chart of another method for monitoring tire parameters of a vehicle according to an embodiment of the present disclosure. The vehicle tire pressure parameter monitoring method is applied to a vehicle tire pressure sensor, the vehicle tire pressure sensor is in communication connection with vehicle-mounted equipment, the vehicle-mounted equipment is connected with a vehicle CAN bus, and the vehicle tire pressure sensor CAN be any one of a plurality of vehicle tire pressure sensors on a vehicle. As shown in fig. 4, the vehicle tire parameter monitoring method includes the following steps.

And 401, receiving a vehicle tire parameter monitoring command sent by the vehicle-mounted equipment according to the tire parameter target monitoring frequency.

Specifically, the vehicle air pressure sensor may be any one of a plurality of vehicle air pressure sensors mounted on a plurality of tires of the vehicle. The vehicle may include a plurality of tires, each of which has a corresponding vehicle tire pressure sensor mounted thereon. In order to obtain more accurate tire parameters, the vehicle tire pressure sensor may be installed inside the corresponding tire. The vehicle tire pressure sensor receives a vehicle tire parameter monitoring instruction sent by the vehicle-mounted equipment according to the target tire parameter monitoring frequency, the vehicle-mounted equipment acquires vehicle speed information of a vehicle through a vehicle CAN bus, determines the target monitoring frequency according to the vehicle speed information, and sends the vehicle tire monitoring instruction to the vehicle tire pressure sensor according to the target monitoring frequency. Before receiving a vehicle tire monitoring instruction, a vehicle tire pressure sensor is in a sleep power-saving mode; after receiving the vehicle tire monitoring command, the vehicle tire pressure sensor is switched from the sleep power saving mode to the working mode in response to the vehicle tire monitoring command.

And 402, acquiring vehicle tire parameters according to the vehicle tire parameter monitoring instruction.

Specifically, after the vehicle tire pressure sensor receives a vehicle tire parameter monitoring instruction sent by the vehicle-mounted device, the vehicle tire pressure sensor acquires vehicle tire parameters of a corresponding vehicle tire, and the vehicle tire parameters may include pressure and temperature of the tire and battery voltage of the sensor.

And 403, generating a tire parameter monitoring result according to the collected vehicle tire parameters.

Specifically, after the vehicle tire pressure sensor acquires the vehicle tire parameters of the corresponding tire, the vehicle tire pressure sensor performs filtering processing on the acquired vehicle tire parameters, and encapsulates the processed vehicle tire parameters into a data frame to obtain a tire parameter monitoring result.

In an embodiment, the generating the tire parameter monitoring result according to the collected vehicle tire parameter may specifically include the following steps:

(31) preprocessing the vehicle tire parameters to obtain processed data;

(32) judging whether the processing data exceeds a preset control range or not;

(33) if the processed data exceeds a preset control range, packaging the identification of the vehicle tire pressure sensor and the processed data to generate a tire parameter monitoring result;

(34) if the processed data does not exceed the preset control range, further judging whether the time interval between the current time and the last time of feeding back the tire parameter monitoring result reaches a preset period or not,

(35) if the preset period is not reached, packaging the identifier of the vehicle tire pressure sensor to generate a tire parameter monitoring result;

(36) and if the preset period is reached, packaging the identification of the vehicle tire pressure sensor and the processed data to generate a tire parameter monitoring result.

Specifically, there is a data error in the vehicle tire parameters acquired by the vehicle tire pressure sensor, so that the acquired tire parameters need to be preprocessed to obtain processed data. In order to reduce accidental errors of measurement, the acquired tire parameters can be processed by adopting a digital filtering technology of a median filtering algorithm to obtain processed data.

It is determined whether the values of the respective parameters in the processed data are within a preset control range. The processing data comprises the pressure and the temperature of the tire and the battery voltage of the vehicle tire pressure sensor, and whether the values of the pressure and the temperature of the tire and the battery voltage of the vehicle tire pressure sensor in the processing data are in a preset control range or not is judged respectively. The preset control range of the pressure of the tire is related to the specification of the tire, the tires of different specifications have different standard pressure values, and the preset control range of the pressure of the tire can be within a certain range of up-and-down fluctuation of the standard pressure values corresponding to the tire. When the pressure value of the tire is higher than the highest pressure threshold value or lower than the lowest pressure threshold value, it is determined that the processed data exceeds a preset control range. The maximum pressure threshold may be set to be 25% higher than the standard pressure value corresponding to the tire, and the minimum pressure threshold may be set to be 12.5% lower than the standard pressure value corresponding to the tire. When the temperature of the tire in the processed data is higher than the temperature threshold value, it is determined that the processed data exceeds a preset control range. The preset control range of the temperature of the tire may be related to the ambient temperature and the vehicle speed, and the temperature threshold may be relatively high in the case where the ambient temperature is high and the vehicle speed is fast. For example, in hot summer, when the temperature of the road surface reaches 70 degrees celsius, the temperature threshold value should be set above 70 degrees celsius, and the temperature threshold value may be specifically set between 90 degrees celsius and 100 degrees celsius. When the battery voltage of the vehicle tire pressure sensor in the processed data is lower than the voltage threshold value, it is determined that the processed data exceeds a preset control range. The voltage threshold value may be set according to a rated voltage of the battery of the vehicle tire pressure sensor, for example, the voltage threshold value is set to ten percent of the rated voltage of the battery of the vehicle tire pressure sensor, and it is determined that the process data exceeds the preset control range when the voltage of the battery of the vehicle tire pressure sensor is lower than ten percent of the rated voltage.

Under normal conditions, the pressure and the temperature of the tire and the battery voltage of the vehicle tire pressure sensor do not change greatly, so that in order to reduce the power consumption of the vehicle tire pressure sensor when transmitting the processing data, a preset period can be set, and under the condition that the processing data does not exceed the preset control range, the vehicle tire pressure sensor transmits the processing data to the vehicle-mounted equipment once in each preset period so as to enable the vehicle-mounted equipment to display the processing data.

And under the condition that the processed data exceeds the preset control range, indicating that abnormal data exists in the processed data, sending the processed data to the vehicle-mounted equipment, packaging the identification of the vehicle tire pressure sensor and the processed data together, and generating a first type of tire parameter monitoring result, wherein the length of a data frame of the first type of tire parameter monitoring result is greater than a preset threshold value. And under the condition that the processed data does not exceed the preset control range, further judging whether the time interval between the current time and the last time of feeding back the tire parameter monitoring result reaches a preset period or not. If the preset period is not reached, the identification of the vehicle tire pressure sensor is packaged to generate a second type tire parameter monitoring result, and the length of a data frame of the second type tire parameter monitoring result is smaller than a preset threshold value. The preset threshold is a set frame length threshold, and the value of the preset threshold is between the length of the data frame of the first type of tire parameter monitoring result and the length of the data frame of the second type of tire parameter monitoring result.

In the embodiment of the application, when the processing data exceeds a preset control range or the time interval between the current time and the last time of feeding back the tire parameter monitoring result reaches a preset period, the vehicle tire pressure sensor sends the first type of tire parameter monitoring result to the vehicle-mounted equipment; and under the condition that the processing data does not exceed the preset control range and the time interval between the current time and the last time of feeding back the tire parameter monitoring result does not reach the preset period, the vehicle tire pressure sensor sends the second type of tire parameter monitoring result to the vehicle-mounted equipment. The data processing method has the advantages that the data processing method does not need to send processing data to the vehicle-mounted equipment every time of detection, safety and effectiveness of tire pressure monitoring are guaranteed, and meanwhile power consumption of the vehicle tire pressure sensor when the processing data is sent is reduced.

And 404, transmitting the tire parameter monitoring result to the vehicle-mounted equipment.

Specifically, the vehicle tire pressure sensor comprises a high-frequency communication interface, and the vehicle tire pressure sensor transmits the generated tire parameter monitoring result to the vehicle-mounted equipment through the high-frequency communication interface so that the vehicle-mounted equipment displays the tire parameter. After the vehicle tire pressure sensor sends a tire parameter monitoring result to the vehicle-mounted equipment, the working mode is switched to the sleep power-saving mode, and a next vehicle tire parameter monitoring instruction sent by the vehicle-mounted equipment is waited.

Referring to fig. 5, fig. 5 is a schematic structural diagram of a vehicle tire parameter monitoring device according to an embodiment of the present disclosure. As shown in fig. 5, the vehicle tire parameter monitoring apparatus 500 includes a first acquisition unit 501, a first determination unit 502, a second determination unit 503, and a first communication unit 504.

The first obtaining unit 501 is configured to obtain vehicle state information through a vehicle CAN bus, where the vehicle state information includes vehicle speed information;

the first determining unit 502 is configured to determine a target speed interval where the vehicle is located according to the vehicle speed information and a preset speed interval range;

the second determining unit 503 is configured to determine a tire parameter target monitoring frequency corresponding to the target speed interval;

the first communication unit 504 is configured to send a vehicle tire parameter monitoring instruction to the vehicle tire pressure sensor according to the target tire parameter monitoring frequency, so that the vehicle tire pressure sensor collects vehicle tire parameters according to the target tire parameter monitoring frequency and generates a tire parameter monitoring result;

the first communication unit 504 is further configured to obtain and display the tire parameter monitoring result.

With regard to the apparatus in the above-described embodiment, the specific manner in which each unit performs the operation has been described in detail in the embodiment related to the method, and will not be described in detail here.

Referring to fig. 6, fig. 6 is a schematic structural diagram of another vehicle tire parameter monitoring device according to an embodiment of the present disclosure. As shown in FIG. 6, the vehicle tire parameter monitoring device 600 includes a second communication unit 601,

The second communication unit 601 is used for receiving a vehicle tire parameter monitoring instruction sent by the vehicle-mounted equipment according to a tire parameter target monitoring frequency;

the acquisition unit 602 is configured to acquire a vehicle tire parameter according to the vehicle tire parameter monitoring instruction;

the generating unit 603 is configured to generate a tire parameter monitoring result according to the collected vehicle tire parameter;

the second communication unit 601 is further configured to send the tire parameter monitoring result to the vehicle-mounted device.

Referring to fig. 7, fig. 7 is a schematic structural diagram of a vehicle tire parameter monitoring system according to an embodiment of the present disclosure. As shown in fig. 7, the vehicle tire parameter monitoring system 700 includes an on-board device 701, a vehicle tire pressure sensor 702, and a vehicle CAN bus 703. The vehicle-mounted equipment 701 is in communication connection with the vehicle tire pressure sensor 702, the vehicle-mounted equipment 701 is connected with a vehicle CAN bus, and the specific description is as follows:

an in-vehicle device 701 including a processor and a memory; the memory and the processor are connected through a bus; the memory is used for storing programs; the processor is configured to execute the program stored in the memory, and when the program is executed, the processor is configured to perform the vehicle tire parameter monitoring method shown in fig. 2 and 3.

A vehicle tire pressure sensor 702 including a processor and a memory; the memory and the processor are connected through a bus; the memory is used for storing programs; the processor is configured to execute the program stored in the memory, and when the program is executed, the processor is configured to execute the vehicle tire parameter monitoring method shown in fig. 4.

Referring to fig. 8, fig. 8 is a schematic structural diagram of a vehicle-mounted device according to an embodiment of the present disclosure, and as shown in fig. 8, the electronic device 800 includes a processor 801 and a memory 802. The processor 801 and the memory 802 may be connected to each other by a communication bus 803. The communication bus 803 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The communication bus 803 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown in FIG. 8, but this is not intended to represent only one bus or type of bus. The memory 802 is used to store a computer program comprising program instructions, and the processor 801 is configured to invoke the program instructions, the program comprising instructions for performing some or all of the steps of the method shown in fig. 2.

The processor 801 may be a general purpose Central Processing Unit (CPU), a microprocessor, an Application-Specific Integrated Circuit (ASIC), or one or more Integrated circuits for controlling the execution of programs according to the above schemes.

The Memory 802 may be a Read-Only Memory (ROM) or other type of static storage device that can store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that can store information and instructions, an Electrically Erasable Programmable Read-Only Memory (EEPROM), a Compact Disc Read-Only Memory (CD-ROM) or other optical Disc storage, optical Disc storage (including Compact Disc, laser Disc, optical Disc, digital versatile Disc, blu-ray Disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to these. The memory may be self-contained and coupled to the processor via a bus. The memory may also be integral to the processor.

The electronic device 800 may further include a communication interface including a Universal Serial Bus (USB) interface, which may be used to connect an external storage medium.

In addition, the electronic device 800 may further include general components such as an antenna, which will not be described in detail herein.

Embodiments of the present application also provide a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for electronic data exchange, and the computer program enables a computer to execute part or all of the steps of any one of the vehicle tire parameter monitoring methods as described in the method embodiments shown in fig. 2 and 3.

Referring to fig. 9, fig. 9 is a schematic structural diagram of a tire pressure sensor of a vehicle according to an embodiment of the present application, and as shown in fig. 9, the electronic device 900 includes a processor 901 and a memory 902. The processor 901 and the memory 902 may be connected to each other via a communication bus 903. The communication bus 903 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The communication bus 903 may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 9, but this does not indicate only one bus or one type of bus. The memory 902 is used for storing a computer program comprising program instructions, and the processor 901 is configured for calling the program instructions, which program comprises instructions for performing some or all of the steps of the method shown in fig. 2.

Processor 901 may be a general purpose Central Processing Unit (CPU), a microprocessor, an Application-Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to control the execution of programs according to the above schemes.

The Memory 902 may be a Read-Only Memory (ROM) or other type of static storage device that can store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that can store information and instructions, an Electrically Erasable Programmable Read-Only Memory (EEPROM), a Compact Disc Read-Only Memory (CD-ROM) or other optical Disc storage, optical Disc storage (including Compact Disc, laser Disc, optical Disc, digital versatile Disc, blu-ray Disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to these. The memory may be self-contained and coupled to the processor via a bus. The memory may also be integral to the processor.

The electronic device 900 may further include a communication interface including a Universal Serial Bus (USB) interface, which may be used to connect an external storage medium.

In addition, the electronic device 900 may further include general components such as an antenna, which will not be described in detail herein.

Embodiments of the present application also provide a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for electronic data exchange, and the computer program enables a computer to execute part or all of the steps of any one of the vehicle tire parameter monitoring methods as described in the method embodiment shown in fig. 4.

It should be understood that the application of the present application is not limited to the above examples, and that modifications or changes may be made by those skilled in the art based on the above description, and all such modifications and changes are intended to fall within the scope of the appended claims.

Claims

1. A vehicle tire parameter monitoring method is applied to vehicle-mounted equipment, the vehicle-mounted equipment is in communication connection with a vehicle tire pressure sensor, the vehicle-mounted equipment is connected with a vehicle Control Area Network (CAN) bus, and the method comprises the following steps:

acquiring vehicle state information through a vehicle CAN bus, wherein the vehicle state information comprises vehicle speed information;

sending a vehicle tire parameter monitoring instruction to the vehicle tire pressure sensor according to the tire parameter target monitoring frequency so that the vehicle tire pressure sensor collects vehicle tire parameters according to the tire parameter target monitoring frequency and generates a tire parameter monitoring result;

and acquiring and displaying the tire parameter monitoring result.

2. The method according to claim 1, wherein the preset speed interval range comprises 0, a first speed interval, a second speed interval, any speed value of the second speed interval is larger than any speed value of the first speed interval;

extracting a speed value of the vehicle speed information;

3. The method according to claim 2, wherein the determining a tire parameter target monitoring frequency corresponding to the target speed interval specifically comprises:

4. The method according to any one of claims 1 to 3, wherein the number of the vehicle tire pressure sensors is at least 1;

the method comprises the following steps of sending a vehicle tire parameter monitoring instruction to a vehicle tire pressure sensor according to the target monitoring frequency so as to enable the vehicle tire pressure sensor to acquire vehicle tire parameters and generate a tire parameter monitoring result according to the tire parameter target monitoring frequency, and acquiring and displaying the tire parameter monitoring result, wherein the method specifically comprises the following steps:

5. The method of claim 4, further comprising:

determining the length of a data frame of the tire parameter monitoring result;

if not, determining that the tire parameter monitoring result is normal;

and if the monitoring data exceed the preset control range, updating the target monitoring frequency to be a second target monitoring frequency, and sending a vehicle tire parameter monitoring instruction to the first vehicle tire pressure sensor according to the second target monitoring frequency to obtain a tire parameter monitoring result.

6. A vehicle tire parameter monitoring method is applied to a vehicle tire pressure sensor, the vehicle tire pressure sensor is in communication connection with an on-board device, the on-board device is connected with a vehicle CAN bus, and the method comprises the following steps:

7. The method of claim 6, wherein generating tire parameter monitoring results from the collected vehicle tire parameters comprises:

preprocessing the vehicle tire parameters to obtain processed data;

judging whether the processing data exceeds a preset control range or not;

8. An in-vehicle device comprising a processor and a memory for storing one or more programs configured for execution by the processor, the programs comprising instructions for performing the method of any of claims 1-5.

9. A vehicle tire pressure sensor comprising a processor and a memory for storing one or more programs configured for execution by the processor, the programs comprising instructions for performing the method of any of claims 6 to 7.

10. A vehicle tire parameter monitoring system, comprising the vehicle device of claim 8 and the vehicle tire pressure sensor of claim 9, the vehicle device being communicatively coupled to the vehicle tire pressure sensor, the vehicle device being coupled to a vehicle CAN bus.