Automobile tire pressure monitoring system based on TPMS sensor

Abstract

The invention relates to the technical field of tire pressure monitoring, and discloses an automobile tire pressure monitoring system based on TPMS (tire pressure monitoring system) sensors, which comprises a control display screen, TPMS sensors arranged in tires in all directions and low-frequency activators arranged corresponding to each group of TPMS sensors, and the host sends an activation instruction to each group of low-frequency activators according to the azimuth information of the set tire. According to the system, the serial number ID of the TPMS sensor arranged in the tire is modified into a more intuitive orientation ID according to the position of the wheel, so that a driver can quickly correspond the orientation ID to the detection use of the related tire, and the host is arranged to send an activation instruction to the low-frequency activator according to the orientation information of the wheel to activate the TPMS sensor in each orientation; the TPMS sensors send detection information to the host in real time, information matching of the TPMS sensors and the wheel orientation is achieved, a driver can visually observe the tire detection condition, and the display screen is controlled to send out a warning signal for an abnormal tire.

Description

Technical Field

[0001] The present invention relates to the field of tire pressure monitoring equipment design, and in particular to a vehicle tire pressure monitoring system based on a TPMS sensor. Background Art

[0002] With the development of society and the popularization of automobiles, safe driving becomes more and more important. Tire Pressure Monitoring System (TPMS) is an active safety system that uses wireless transmission technology to collect data such as tire pressure and temperature of automobiles while driving or stationary using a highly sensitive miniature wireless sensor device fixed in the tire of the automobile, and transmits the data to the host in the cab, and displays relevant data such as tire pressure and temperature in real time in a digital form, and alerts the driver in the form of a buzzer or voice when the tire is abnormal. The use of the tire pressure monitoring system ensures that the pressure and temperature of the tire are maintained within the standard range, which reduces the probability of tire blowout and tire damage, and reduces fuel consumption and damage to vehicle components. Before using the tire pressure monitoring system, the sensor on the tire needs to be matched with the host terminal so that the host terminal can determine the location of each tire where the sensor is located.

[0003] At present, the basic matching method for sensors is that the host terminal sets the sensor ID according to the established tire position, and then installs the sensor with the corresponding ID on the corresponding tire for direct matching. This solution may cause connection disorder or matching error, and requires manual matching, which has low work efficiency and high labor costs. It is difficult to have efficient replaceability, and the existing tire pressure monitoring system has a relatively simple detection of tire pressure changes, making it difficult to analyze the impact of external factors on vehicle driving safety. Therefore, a vehicle tire pressure monitoring system based on TPMS sensor is proposed. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In order to solve at least one aspect of the above problems, the present invention first provides a car tire pressure monitoring system based on TPMS sensor, which is equipped with an ID setting system that can be automatically activated and matched, and intelligently analyzes the impact of environmental factors on the tire pressure of the vehicle, so that the cab can directly query the vehicle tire pressure and improve its matching and monitoring efficiency.

[0006] (II) Technical solution

[0007] In order to solve the above technical problems, the present invention provides a TPMS sensor-based automobile tire pressure monitoring system, comprising a control display screen, TPMS sensors arranged in tires of various directions, and low-frequency activators arranged corresponding to each group of TPMS sensors, wherein:

[0008] The control display screen is arranged in the cab, the control display screen is connected to an external programming tool or a mobile phone APP via a Bluetooth communication link, and the control display screen is connected to each group of repeaters, each group of TPMS sensors and each group of low-frequency activators via a Bluetooth communication module;

[0009] The control display screen is connected to a host, and the host sends activation instructions to each group of low-frequency activators according to the orientation information of the set tire;

[0010] After receiving the corresponding low-frequency activation signal, the low-frequency activator sends the sensing information of the tire monitored by the corresponding connected TPMS sensor to the host, so that the host can match the tire position and tire in-tire detection information;

[0011] Each group of repeaters is respectively connected to the host and the corresponding low-frequency activator, and is used to receive the activation command issued by the host and forward the activation command to the low-frequency activator. Each group of repeaters can receive the sensor information issued by the corresponding TPMS sensor and forward it to the host;

[0012] The host establishes a communication connection with each control element through a Bluetooth communication module. The Bluetooth communication module includes a main Bluetooth for the host to send and receive signals and multiple groups of communication Bluetooth. The communication Bluetooth includes a sub-Bluetooth connected to each group of TPMS sensors, a programming tool, and an auxiliary Bluetooth on a mobile phone APP, to ensure that the main Bluetooth of the host can establish a communication connection with all the above communication Bluetooths.

[0013] Further, the sensing information includes an identification code of the low-frequency activator;

[0014] After receiving the corresponding low-frequency activation signal, the TPMS sensor determines the identification code of the low-frequency activator that activates itself;

[0015] After the host receives the sensor information of the identification codes of the four directions, the transmission frequency band and transmission order of each sensor are set so that the vehicle tires refresh the detection signals at high frequency in the order of left front, right front, left rear and right rear. After the host completely receives the sensor information of the preset identification codes, a limited signal channel for the identification codes of the four directions is established.

[0016] Further, the TPMS sensor in the left front wheel of the vehicle is set to have an ID of TPMS sensor 1, and the low-frequency activator corresponding to the TPMS sensor 1 is set to low-frequency activator 1;

[0017] The TPMS sensor in the right front wheel of the vehicle is set to have an ID of TPMS sensor 2, and the low-frequency activator corresponding to the TPMS sensor 2 is set to low-frequency activator 2;

[0018] The TPMS sensor in the left rear wheel of the vehicle is set to have an ID of TPMS sensor 3, and the low-frequency activator corresponding to the TPMS sensor 3 is set to low-frequency activator 3;

[0019] The TPMS sensor in the right rear wheel of the vehicle is set to have an ID of TPMS sensor 4, and the low-frequency activator corresponding to the TPMS sensor 4 is set to be low-frequency activator 4;

[0020] In addition, the system is also provided with a spare tire, in which an independent TPMS sensor N is provided, and an independent low-frequency activator N is provided corresponding to the TPMS sensor N.

[0021] Furthermore, the spare tire can be used as a replacement group for four groups of tires: left front, right front, left rear and right rear. After the spare tire is replaced with the tire in the corresponding position, the TPMS sensor N and low-frequency activator N installed inside it need to be replaced with a new position ID, and the activation signal should be re-issued to the repeater on the corresponding position ID connected to the host to establish a communication connection between the replaced new TPMS sensor and the host.

[0022] Furthermore, the control display screen controls the low-frequency activation module and the high-frequency receiving module through the host. The control display screen sends the activation instruction to each repeater through the control low-frequency activation module, and each repeater sends the activation instruction to the low-frequency activator on the tires in each direction. The control high-frequency receiving module is used to receive and refresh the detection information sent by each TPMS sensor forwarded by each repeater at high frequency.

[0023] Furthermore, the control display screen establishes a connection with each repeater through the host and the Bluetooth communication module, receives a low-frequency activation signal from the host through the repeater, and uses the relay low-frequency activation module to send the low-frequency activation signal to the low-frequency activator to activate the TPMS sensor corresponding to the repeater;

[0024] The repeater receives the detection signal of the corresponding TPMS sensor into the repeater through the relay high-frequency receiving module, and the repeater sends the detection information to the host through the control high-frequency receiving module, and the host integrates all the sensor information to realize tire pressure monitoring of tires in all directions of the vehicle;

[0025] The host, control display screen, each repeater and each sensor are all provided with an independent voltage-stabilized power supply.

[0026] Furthermore, the host is connected to a memory, which stores reasonable thresholds of tire pressure changes in various directions set by a programming tool or a mobile phone APP. Different thresholds are set according to the influence of vehicle driving conditions, temperature, climate, acceleration direction and wheel position to monitor the status of tire pressure in different positions. The host determines the tire status based on the monitoring data, and displays abnormal tires on the control display screen, while issuing a warning.

[0027] In addition, the automobile tire pressure monitoring system of the present invention uses the above-mentioned TPMS sensor to monitor the automobile tire pressure. The working process is as follows:

[0028] S1. Read the ID of the TPMS sensor installed on the wheel of the vehicle, determine the position information of each tire and sensor, match the tire and sensor, and convert the original ID of the sensor into position ID sorting on the programming tool or mobile phone APP, and display it on the control display screen;

[0029] S2, sending activation instructions to the TPMS sensors of each orientation ID according to the position of the tire, controlling the display screen to match the new orientation ID of each sensor, sending activation instructions to the corresponding low-frequency activator according to the matched orientation ID, and starting each group of TPMS sensors;

[0030] S3, initializing the settings of each group of TPMS sensors, viewing the initial detection data of each sensor on the control display screen, and comparing it with the initial tire pressure of each tire to determine the accuracy of each sensor;

[0031] S4. According to the objective factors of the vehicle's driving conditions, speed, climate, acceleration direction, wheel position and tire pressure changes, the threshold is reasonably set, and the TPMS sensor monitors whether the tire pressure of the matching tire is within the threshold range;

[0032] S5. Determine the impact of vehicle driving status and environmental factors on tire pressure based on vehicle driving conditions, speed, climate, acceleration direction and wheel position, and monitor tire pressure in real time;

[0033] S6. The tire pressure and tire temperature monitoring data of the relevant ID are displayed on the control display screen, and the tire is displayed in normal or abnormal state according to the threshold setting, which is convenient for the owner to query.

[0034] (III) Beneficial effects

[0035] 1. The present invention provides a TPMS sensor-based automobile tire pressure monitoring system. The system modifies the ID number of the TPMS sensor set in the tire into a more intuitive position ID according to the wheel position, which is beneficial for the driver to quickly match the position ID with the detection of the relevant tire. The host is set to send an activation instruction to the low-frequency activator according to the wheel position information to activate the TPMS sensors in various positions. The TPMS sensor immediately sends the detection information to the host, thereby matching the information of each TPMS sensor with the wheel position, allowing the driver to observe the tire detection status more intuitively. The control display screen can display abnormal tires and send warning signals to immediately remind the driver to deal with them.

[0036] 2. This solution sets up a one-to-many Bluetooth communication network and establishes a Bluetooth information transmission network with the main Bluetooth set on the host as the transmission center. The stability of Bluetooth transmission is higher. This technology requires both parties to complete pairing before they can send messages to each other, which can effectively avoid interference from external control signals. The sensor unit realizes data transmission through the Bluetooth communication protocol. The main Bluetooth and multiple groups of communication Bluetooth are equipped with independent communication links. With its high-frequency refresh speed, it can quickly and accurately detect the tire pressure and temperature information of each group of wheels, thereby realizing safe monitoring of tire use during vehicle operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A control principle diagram of a tire pressure monitoring system for an automobile according to an embodiment of the present invention;

[0038] Figure 2 A communication principle diagram of a tire pressure monitoring system for an automobile according to an embodiment of the present invention;

[0039] Figure 3 The following is a flowchart of the automobile tire pressure monitoring system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0040] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0041] See also Figures 1 to 3 The embodiment of the present invention provides a TPMS sensor-based automobile tire pressure monitoring system, including a control display screen, TPMS sensors arranged in tires of various directions, and low-frequency activators arranged corresponding to each group of TPMS sensors, wherein:

[0042] The control display screen is set in the cab, and the control display screen is connected to the external programming tool or mobile phone APP through the Bluetooth communication link. The control display screen is connected to each group of repeaters, each group of TPMS sensors and each group of low-frequency activators through the Bluetooth communication module. The owner uses the external programming tool or mobile phone APP to turn on Bluetooth to establish a connection with the main Bluetooth in the host. Within a certain communication range, the main Bluetooth can achieve one-to-many alternating Bluetooth communication control, so that the host can receive the activation command input by the external programming tool, mobile phone APP and control display screen. The host converts the digital signal in the activation command into an analog control signal and sends it to the host through each The group repeater sends it to the corresponding low-frequency activator, and the low-frequency activator sends a low-frequency activation signal to activate the TPMS sensor connected to the low-frequency activator, thereby initializing each group of TPMS sensors, and receiving the tire pressure and tire temperature data detected by each group of TPMS sensors for the first time, and comparing the tire pressure detection information with the initial tire pressure information set for the tire, to judge the detection accuracy of each group of TPMS sensors, avoid the influence of insufficient detection accuracy of a certain TPMS sensor, ensure real-time and accurate detection of tire pressure during vehicle driving, avoid unstable tire pressure, tire puncture or even tire blowout, and ensure vehicle driving safety.

[0043] The control display screen is connected to the host, and the host sends activation instructions to each group of low-frequency activators according to the set tire position information. The control display screen is set to a touch screen, and a position picture of the vehicle simulated wheel is displayed on the control display screen, so that the control display screen can directly display the tire detection status. If the tire pressure is abnormal, the vehicle simulation picture can directly display the position of the abnormal tire, prompting the owner to take corresponding measures to ensure the safety of the vehicle. The control display screen can also be used to send control information to the host to search and query the accurate detection information of the tire pressure in a certain position. The control display screen can directly input the activation instruction, so that the host can send the activation instruction to each group of low-frequency activators through the repeater to activate the corresponding TPMS sensor.

[0044] After receiving the corresponding low-frequency activation signal, the low-frequency activator sends the sensor information of the tire monitored by the corresponding connected TPMS sensor to the host, so that the host can match the tire position and tire detection information. Each time the vehicle is started, a new round of activation of all TPMS sensors is required. The low-frequency activator is set to receive the activation command sent by the host through the repeater, trigger and start the corresponding TPMS sensor, and realize the tire pressure and temperature detection of the tire where the TPMS sensor is located. The host confirms the original ID of the TPMS sensor through the response to the activation command, and sets a new position ID for the position of the original ID to match the wheel position of the vehicle simulation picture on the control display screen, so that the control display screen can instantly match and query the tire pressure and temperature information of each tire.

[0045] Each group of repeaters is connected to the host and the corresponding low-frequency activator respectively, and is used to receive the activation command issued by the host and forward the activation command to the low-frequency activator. Each group of repeaters can receive the sensor information issued by the corresponding TPMS sensor and forward it to the host. Each group of repeaters establishes a Bluetooth communication connection with the host. Each group of repeaters corresponds to a group of low-frequency activators, which can ensure that the activation command issued by the host is accurately and independently sent to the corresponding TPMS sensor. Each group of TPMS sensors performs real-time detection of the tire pressure and temperature inside the tires installed with it, and sends the detection data to the host through the repeater. The host compares the detection data according to the preset tire pressure threshold to determine whether the tire pressure is abnormal, and displays the position of the tire with abnormal tire pressure on the control display screen, issuing an abnormal alarm to prompt the owner to drive carefully and deal with it immediately.

[0046] The host establishes a communication connection with each control component through the Bluetooth communication module. The Bluetooth communication module includes a main Bluetooth for the host to send and receive signals and multiple groups of communication Bluetooth. The communication Bluetooth includes a sub-Bluetooth connected to each group of TPMS sensors, programming tools and auxiliary Bluetooth on the mobile phone APP, to ensure that the main Bluetooth of the host can establish a communication connection with all the above communication Bluetooth. The vehicle has a limited range. Bluetooth control can establish a one-to-many communication network, and arrange the order of Bluetooth input of each group of detection terminals. The host is used to sort, receive and refresh the detection data at a high frequency, so that the host can receive the detection information sent by TPMS sensors in all directions almost at the same time. The host processes the detection data, compares the tire pressure threshold and other objective factors to compare and analyze the current status of the tire, and displays the analysis results on the control display.

[0047] The sensing information includes the identification code of the low-frequency activator, which is unique and convenient for the host to compare and confirm the low-frequency activator of each group of TPMS sensors, so as to realize independent control of each group of TPMS sensors.

[0048] After receiving the corresponding low-frequency activation signal, the TPMS sensor determines the identification code of the low-frequency activator that activates itself, that is, the TPMS sensor starts working and can detect the temperature and pressure inside the tire, and send the detection information to the host through the repeater.

[0049] See also Figure 1After receiving the sensor information of the identification codes of the four directions, the host sets the transmission frequency band and transmission sequence of each sensor, so that the automobile tires refresh the detection signals at high frequency in the order of left front, right front, left rear and right rear. After completely receiving the sensor information of the preset identification code, the host establishes a limited signal channel for the identification codes of the four directions. The four limited signal channels independently establish Bluetooth communication connections with the host. The host receives the detection signals of the TPMS sensors in the left front, right front, left rear and right rear tires of the automobile tires in order, and refreshes the detection information of each group of TPMS sensors at high frequency. The tire pressure and temperature information of the four directions detected almost simultaneously are displayed on the control display screen visible to the naked eye. The host information processing end has high receiving efficiency and high refresh rate, and will not cause the lag effect of the detection data of a certain direction tire being received in sequence. Simultaneous monitoring of the four directions tires is achieved in the frequency band observable by the naked eye, ensuring stable monitoring and processing of the automobile tire pressure.

[0050] The TPMS sensor in the left front wheel of the car is set to TPMS sensor 1. The low-frequency activator corresponding to TPMS sensor 1 is set to low-frequency activator 1. TPMS sensor 1 is activated by low-frequency activator 1 to detect the tire pressure and temperature of the left front wheel of the car, and the detection information is sent to the host for analysis and display.

[0051] The TPMS sensor in the right front wheel of the car is set to TPMS sensor 2. The low-frequency activator corresponding to TPMS sensor 2 is set to low-frequency activator 2. The TPMS sensor 2 is activated by low-frequency activator 2 to detect the tire pressure and temperature of the right front wheel of the car, and the detection information is sent to the host for analysis and display.

[0052] The TPMS sensor in the left rear wheel of the car is set to TPMS sensor 3. The low-frequency activator corresponding to TPMS sensor 3 is set to low-frequency activator 3. TPMS sensor 3 is activated by low-frequency activator 3 to detect the tire pressure and temperature of the left rear wheel of the car, and the detection information is sent to the host for analysis and display.

[0053] The TPMS sensor in the right rear wheel of the car is set with an ID of TPMS sensor 4, and the low-frequency activator corresponding to TPMS sensor 4 is set to low-frequency activator 4. The TPMS sensor 4 is activated by low-frequency activator 4 to detect the tire pressure and temperature of the right rear wheel of the car, and the detection information is sent to the host for analysis and display.

[0054] By resetting the IDs of the TPMS sensors at four positions of the vehicle and editing and displaying the ID installation positions of the TPMS sensors on the control display, the driver can directly observe whether the working conditions of the tire pressure and temperature of the four tires are normal or abnormal during driving.

[0055] In addition, the system is also provided with a spare tire, which is equipped with an independent TPMS sensor N. The TPMS sensor N is correspondingly provided with an independent low-frequency activator N. The spare tire can be activated and connected with the host and the control display screen through its independently provided TPMS sensor N and low-frequency activator N, so as to facilitate the monitoring and control of the spare tire.

[0056] The spare tire can be used as a replacement for four sets of tires: left front, right front, left rear and right rear. After the spare tire is replaced with the tire in the corresponding position, it is necessary to replace the TPMS sensor N and low-frequency activator N installed inside with the new position ID, and re-send the activation signal to the repeater on the corresponding position ID connected to the host to establish a communication connection between the replaced new TPMS sensor and the host. The host establishes a connection with the TPMS sensor of the new position ID through the new activation signal, and establishes detection and control of the TPMS sensor of the new position ID by the control display screen, so that the spare tire can be combined with the undamaged tire to form a new car running tire, realize the tire status detection of the new tire system, and ensure the integrity of the car tire pressure detection work.

[0057] See also Figure 2 , the control display screen is controlled through the host and the control low-frequency activation module and the control high-frequency receiving module. The control display screen sends the activation command to each repeater through the control low-frequency activation module, and each repeater sends the activation command to the low-frequency activator on each tire. The control high-frequency receiving module is used to receive and refresh the detection information sent by each TPMS sensor forwarded by each repeater at high frequency. The control low-frequency activation module receives the activation command sent by the host, and then forwards it to each group of low-frequency activators through the repeater to turn on the TPMS sensor with the corresponding ID. At this time, each group of TPMS sensors starts to detect tire pressure and temperature, and cooperates with the Bluetooth communication module to send the detection information to the host at high frequency, which is received and refreshed at high frequency by the host to realize the monitoring and control of tire pressure and temperature.

[0058] The control display screen establishes a connection with each repeater through the host and the Bluetooth communication module, receives the low-frequency activation signal sent by the host through the repeater, and uses the relay low-frequency activation module to send the low-frequency activation signal to the low-frequency activator to activate the TPMS sensor corresponding to the repeater. The TPMS sensor serves as a contact detection sensor for tire pressure and temperature. After receiving the low-frequency activation signal, it starts working and provides sensor detection information for the host and the control display screen.

[0059] The repeater receives the detection signal of the corresponding TPMS sensor into the repeater through the relay high-frequency receiving module, and the repeater sends the detection information to the host by controlling the high-frequency receiving module. The host integrates all sensor information to realize tire pressure monitoring of tires in all directions of the vehicle. The independent TPMS sensor establishes a connection with the host through the corresponding repeater, and can cooperate with the Bluetooth communication link to input the detection signal into the host at high frequency. The host receives it at high frequency and refreshes the comparison to realize the analysis of the detection information.

[0060] The host, control display screen, each repeater and each sensor are equipped with an independent voltage-stabilized power supply. Setting up a voltage-stabilized power supply can ensure the stable operation of all electronic components in the entire control system, avoid tire pressure monitoring risks caused by voltage failure, and ensure driving safety.

[0061] The host is connected to a memory, which contains reasonable thresholds of tire pressure changes in various directions set by programming tools or mobile phone APP. Different thresholds are set according to the influence of vehicle driving conditions, temperature, climate, acceleration direction and wheel position. The status of tire pressure in different positions is monitored. The host determines the tire status based on the monitoring data, and displays abnormal tires on the control display screen, and issues a warning at the same time.

[0062] The impact of factors such as bumps and vibrations, deceleration and pauses, turns, acceleration direction and wheel position encountered during vehicle driving, or the impact of climate such as winter and summer temperatures and driving time on the tire pressure of the wheels themselves, will cause the tire pressure and temperature to fluctuate. Reasonable setting of the tire pressure threshold during wheel driving through programming tools or mobile phone APP can enhance the control range of vehicle operation, avoid rigid vehicle settings, and be more suitable for smart car driving.

[0063] See also Figure 3 In an embodiment of the present invention, the working process of the automobile tire pressure monitoring system using the above-mentioned TPMS sensor to monitor the automobile tire pressure is as follows:

[0064] S1. Read the ID of the TPMS sensor installed on the wheel of the vehicle, determine the position information of each tire and sensor, match the tire and sensor, and convert the original ID of the sensor into position ID sorting on the programming tool or mobile phone APP, and display it on the control display screen;

[0065] S2, sending activation instructions to the TPMS sensors of each orientation ID according to the position of the tire, controlling the display screen to match the new orientation ID of each sensor, sending activation instructions to the corresponding low-frequency activator according to the matched orientation ID, and starting each group of TPMS sensors;

[0066] S3, initializing the settings of each group of TPMS sensors, viewing the initial detection data of each sensor on the control display screen, and comparing it with the initial tire pressure of each tire to determine the accuracy of each sensor;

[0067] S4. According to the objective factors of the vehicle's driving conditions, speed, climate, acceleration direction, wheel position and tire pressure changes, the threshold is reasonably set, and the TPMS sensor monitors whether the tire pressure of the matching tire is within the threshold range;

[0068] S5. Determine the impact of vehicle driving status and environmental factors on tire pressure based on vehicle driving conditions, speed, climate, acceleration direction and wheel position, and monitor tire pressure in real time;

[0069] S6. The tire pressure and tire temperature monitoring data of the relevant ID are displayed on the control display screen, and the tire is displayed in normal or abnormal state according to the threshold setting, which is convenient for the owner to query.

[0070] Although the disclosure is disclosed as above, the protection scope of the disclosure is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A tire pressure monitoring system for automobiles based on TPMS sensors, characterized in that: It includes a control display screen, TPMS sensors arranged in each tire, and low-frequency activators arranged corresponding to each group of TPMS sensors, wherein: The control display screen is arranged in the cab, the control display screen is connected to an external programming tool or a mobile phone APP via a Bluetooth communication link, and the control display screen is connected to each group of repeaters, each group of TPMS sensors and each group of low-frequency activators via a Bluetooth communication module; The control display screen is connected to a host, and the host sends activation instructions to each group of low-frequency activators according to the orientation information of the set tire; After receiving the corresponding low-frequency activation signal, the low-frequency activator sends the sensing information of the tire monitored by the corresponding connected TPMS sensor to the host, so that the host can match the tire position and tire in-tire detection information; Each group of repeaters is respectively connected to the host and the corresponding low-frequency activator, and is used to receive the activation command issued by the host and forward the activation command to the low-frequency activator. Each group of repeaters can receive the sensor information issued by the corresponding TPMS sensor and forward it to the host; The host establishes a communication connection with each control element through a Bluetooth communication module. The Bluetooth communication module includes a main Bluetooth for the host to send and receive signals and multiple groups of communication Bluetooth. The communication Bluetooth includes a sub-Bluetooth connected to each group of TPMS sensors, a programming tool, and an auxiliary Bluetooth on a mobile phone APP, to ensure that the main Bluetooth of the host can establish a communication connection with all the above communication Bluetooths.

2. The automobile tire pressure monitoring system based on the TPMS sensor according to claim 1, characterized in that: The sensing information includes an identification code of the low frequency activator; After receiving the corresponding low-frequency activation signal, the TPMS sensor determines the identification code of the low-frequency activator that activates itself; After the host receives the sensor information of the identification codes of the four directions, the transmission frequency band and transmission order of each sensor are set so that the vehicle tires refresh the detection signals at high frequency in the order of left front, right front, left rear and right rear. After the host completely receives the sensor information of the preset identification codes, a limited signal channel for the identification codes of the four directions is established.

3. The automobile tire pressure monitoring system based on the TPMS sensor according to claim 1, characterized in that: The TPMS sensor in the left front wheel of the vehicle is set to have an ID of TPMS sensor 1, and the low-frequency activator corresponding to the TPMS sensor 1 is set to low-frequency activator 1; The TPMS sensor in the right front wheel of the vehicle is set to have an ID of TPMS sensor 2, and the low-frequency activator corresponding to the TPMS sensor 2 is set to low-frequency activator 2; The TPMS sensor in the left rear wheel of the vehicle is set to have an ID of TPMS sensor 3, and the low-frequency activator corresponding to the TPMS sensor 3 is set to low-frequency activator 3; The TPMS sensor in the right rear wheel of the vehicle is set to have an ID of TPMS sensor 4, and the low-frequency activator corresponding to the TPMS sensor 4 is set to be low-frequency activator 4; In addition, the system is also provided with a spare tire, in which an independent TPMS sensor N is provided, and an independent low-frequency activator N is provided corresponding to the TPMS sensor N.

4. The automobile tire pressure monitoring system based on the TPMS sensor according to claim 3, characterized in that: The spare tire can be used as a replacement group for four groups of tires: left front, right front, left rear and right rear. After the spare tire is replaced with the tire in the corresponding position, the TPMS sensor N and low-frequency activator N installed inside it need to be replaced with a new position ID, and the activation signal should be re-issued to the repeater on the corresponding position ID connected to the host to establish a communication connection between the replaced new TPMS sensor and the host.

5. The automobile tire pressure monitoring system based on TPMS sensor according to claim 1, characterized in that: The control display screen controls the low-frequency activation module and the high-frequency receiving module through the host. The control display screen sends the activation instruction to each repeater through the control low-frequency activation module, and each repeater sends the activation instruction to the low-frequency activator on the tires in each direction. The control high-frequency receiving module is used to receive and refresh the detection information sent by each TPMS sensor forwarded by each repeater at high frequency.

6. The automobile tire pressure monitoring system based on TPMS sensor according to claim 5, characterized in that: The control display screen establishes a connection with each repeater through the host and the Bluetooth communication module, receives the low-frequency activation signal sent by the host through the repeater, and uses the relay low-frequency activation module to send the low-frequency activation signal to the low-frequency activator to activate the TPMS sensor corresponding to the repeater; The repeater receives the detection signal of the corresponding TPMS sensor into the repeater through the relay high-frequency receiving module, and the repeater sends the detection information to the host through the control high-frequency receiving module, and the host integrates all the sensor information to realize tire pressure monitoring of tires in all directions of the vehicle; The host, control display screen, each repeater and each sensor are all provided with an independent voltage-stabilized power supply.

7. The automobile tire pressure monitoring system based on TPMS sensor according to claim 1, characterized in that: The host is connected to a memory, which contains reasonable thresholds of tire pressure changes in various directions set by a programming tool or a mobile phone APP. Different thresholds are set according to the influence of vehicle driving conditions, temperature, climate, acceleration direction and wheel position to monitor the status of tire pressure in different positions. The host determines the tire status based on the monitoring data, and displays abnormal tires on the control display screen, while issuing a warning.

8. The automobile tire pressure monitoring system based on TPMS sensor according to claim 1, characterized in that: The workflow of the above TPMS sensor to monitor the tire pressure of the car is as follows: S1. Read the ID of the TPMS sensor installed on the wheel of the vehicle, determine the position information of each tire and sensor, match the tire and sensor, and convert the original ID of the sensor into position ID sorting on the programming tool or mobile phone APP, and display it on the control display screen; S2, sending activation instructions to the TPMS sensors of each orientation ID according to the position of the tire, controlling the display screen to match the new orientation ID of each sensor, sending activation instructions to the corresponding low-frequency activator according to the matched orientation ID, and starting each group of TPMS sensors; S3, initializing the settings of each group of TPMS sensors, viewing the initial detection data of each sensor on the control display screen, and comparing it with the initial tire pressure of each tire to determine the accuracy of each sensor; S4. According to the objective factors of the vehicle's driving conditions, speed, climate, acceleration direction, wheel position and tire pressure changes, the threshold is reasonably set, and the TPMS sensor monitors whether the tire pressure of the matching tire is within the threshold range; S5. Determine the impact of vehicle driving status and environmental factors on tire pressure based on vehicle driving conditions, speed, climate, acceleration direction and wheel position, and monitor tire pressure in real time; S6. The tire pressure and tire temperature monitoring data of the relevant ID are displayed on the control display screen, and the tire is displayed in normal or abnormal state according to the threshold setting, which is convenient for the owner to query.

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