Vehicle, tire pressure detection method, tire pressure detection controller and active adjustment system

Abstract

This application discloses a vehicle and its tire pressure monitoring method, tire pressure monitoring controller, and active adjustment system. The tire pressure monitoring method includes: acquiring a tire pressure monitoring mode; collecting tire pressure; and adjusting the tire pressure collection rate and / or tire pressure transmission frequency based on changes in tire pressure. Therefore, this method adjusts the tire pressure collection rate and tire pressure transmission frequency according to the tire pressure monitoring mode and changes in tire pressure. This achieves power saving when tire pressure remains relatively stable or the active tire pressure adjustment system is in standby mode. Simultaneously, it ensures the quality of tire pressure monitoring system operation by collecting and transmitting tire pressure at an appropriate frequency when tire pressure changes significantly or the active tire pressure adjustment system is active.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a tire pressure detection method of a vehicle, a tire pressure monitoring controller, a vehicle tire pressure active adjustment system and a vehicle. BACKGROUND

[0002] With the rapid development of the automobile industry, people's requirements for the safety of vehicles and driving experience are also increasing, and the tire pressure of the vehicle is particularly important in terms of driving safety and driving comfort.

[0003] For the collection and management of vehicle tire pressure, in the related art, a tire pressure monitoring system (TPMS) is mounted on the vehicle to collect and monitor the tire pressure of the vehicle. However, this technical solution collects tire pressure signals at a fixed frequency, which is not flexible and reduces the practicability of the system. SUMMARY

[0004] The present application aims to at least solve one of the technical problems in the related art. To this end, the first purpose of the present application is to provide a tire pressure detection method of a vehicle, which adjusts the collection rate of the tire pressure and / or the transmission frequency of the tire pressure according to the tire pressure monitoring mode and the change of the tire pressure. This can save power when the tire pressure does not change much or the tire pressure active adjustment system is in standby state, and can collect and transmit the tire pressure at an appropriate frequency when the tire pressure changes greatly or the tire pressure active adjustment system is in working state, so as to ensure the working quality of the system.

[0005] The second purpose of the present application is to provide a tire pressure monitoring controller.

[0006] The third purpose of the present application is to provide a vehicle tire pressure active adjustment system.

[0007] The fourth purpose of the present application is to provide a vehicle.

[0008] To achieve the above-mentioned purposes, the first aspect of the present application provides a tire pressure detection method of a vehicle, comprising: obtaining a tire pressure monitoring mode; collecting tire pressure and adjusting the collection rate of the tire pressure and / or the transmission frequency of the tire pressure according to the change of the tire pressure.

[0009] According to the tire pressure detection method of the vehicle, the tire pressure monitoring mode is first acquired, then the tire pressure is collected, and the collection rate of the tire pressure and / or the transmission frequency of the tire pressure is adjusted according to the change of the tire pressure. Thus, the collection rate of the tire pressure and the transmission frequency of the tire pressure are adjusted according to the tire pressure monitoring mode and the change of the tire pressure of the current system, so that the power consumption can be saved when the tire pressure does not change greatly or the tire pressure active adjustment system is in a standby state, and the tire pressure can be collected and transmitted at a suitable frequency when the tire pressure changes greatly or the tire pressure active adjustment system is in a working state, so as to ensure the working quality of the tire pressure active adjustment system.

[0010] In addition, the tire pressure detection method of the vehicle according to the above-mentioned embodiments of the application can further have the following additional technical features:

[0011] According to one embodiment of the application, the tire pressure monitoring mode is acquired by collecting tire monitoring data and determining the tire pressure monitoring mode according to the tire monitoring data. The tire pressure detection method of the vehicle further includes adjusting at least one of the collection rate of the tire monitoring data, the collection rate of the tire pressure, the transmission frequency of the tire monitoring data, and the transmission frequency of the tire pressure according to the change of the tire pressure.

[0012] According to one embodiment of the application, the tire pressure monitoring mode includes a parking mode, a low-speed mode, and a driving mode, and the tire monitoring data includes centripetal acceleration of the vehicle tire. The determination of the tire pressure monitoring mode according to the tire monitoring data includes: when the centripetal acceleration is greater than or equal to a first centripetal acceleration threshold and less than or equal to a second centripetal acceleration threshold, if the first time period is continuous, the tire pressure monitoring mode is determined to be switched from the parking mode to the low-speed mode; when the centripetal acceleration is less than the first centripetal acceleration threshold and the second time period is continuous, the tire pressure monitoring mode is determined to be switched from the low-speed mode to the parking mode; when the tire pressure monitoring mode is in the parking mode, if the centripetal acceleration is greater than the second centripetal acceleration threshold, the tire pressure monitoring mode is determined to be switched from the parking mode to the driving mode; when the tire pressure monitoring mode is in the low-speed mode, if the centripetal acceleration is greater than the second centripetal acceleration threshold, the tire pressure monitoring mode is determined to be switched from the low-speed mode to the driving mode; and when the tire pressure monitoring mode is in the driving mode, if the centripetal acceleration is less than or equal to the second centripetal acceleration threshold, the tire pressure monitoring mode is determined to be switched from the driving mode to the low-speed mode.

[0013] According to one embodiment of the present application, at least one of the collection rate of the tire monitoring data, the collection rate of the tire pressure, the transmission frequency of the tire monitoring data and the transmission frequency of the tire pressure is adjusted according to the change of the tire pressure, including: when the tire pressure monitoring mode is switched from the parking mode to the running mode, the collection rate of the tire monitoring data is adjusted from a first collection rate to a second collection rate, the collection rate of the tire pressure is adjusted from a third collection rate to a fourth collection rate, the transmission frequency of the tire monitoring data is adjusted from zero to a first transmission frequency, and the transmission frequency of the tire pressure is adjusted from zero to a second transmission frequency, wherein the second collection rate is less than the first collection rate, and the fourth collection rate is greater than the third collection rate; when the tire pressure monitoring mode is switched from the parking mode to the low-speed mode, the collection rate of the tire monitoring data is adjusted from the first collection rate to a fifth collection rate, the collection rate of the tire pressure is adjusted from the third collection rate to a sixth collection rate, the transmission frequency of the tire monitoring data is adjusted from zero to a third transmission frequency, and the transmission frequency of the tire pressure is adjusted from zero to a fourth transmission frequency, wherein the fifth collection rate is less than the first collection rate, and the sixth collection rate is greater than the third collection rate.

[0014] According to one embodiment of the present application, at least one of the collection rate of the tire monitoring data, the collection rate of the tire pressure, the transmission frequency of the tire monitoring data and the transmission frequency of the tire pressure is adjusted according to the tire pressure, and further includes: when the tire pressure monitoring mode is the parking mode, if it is determined according to the tire pressure that the vehicle is performing active tire pressure adjustment, at least one of the collection rate of the tire monitoring data, the collection rate of the tire pressure, the transmission frequency of the tire monitoring data and the transmission frequency of the tire pressure is adjusted according to the tire pressure adjustment working state of the vehicle.

[0015] According to one embodiment of the present application, at least one of the collection rate of the tire monitoring data, the collection rate of the tire pressure, the transmission frequency of the tire monitoring data and the transmission frequency of the tire pressure is adjusted according to the tire pressure adjustment working state of the vehicle, including: when the vehicle is in the deflation working state, the collection rate of the tire pressure is adjusted from the third collection rate to a seventh collection rate, the collection rate of the tire monitoring data remains unchanged, the transmission frequency of the tire monitoring data is adjusted from zero to a fifth transmission frequency, and the transmission frequency of the tire pressure is adjusted from zero to a sixth transmission frequency, wherein the seventh collection rate is greater than the third collection rate; when the vehicle is in the inflation working state, the collection rate of the tire pressure is adjusted from the third collection rate to an eighth collection rate, the collection rate of the tire monitoring data remains unchanged, the transmission frequency of the tire monitoring data is adjusted from zero to a seventh transmission frequency, and the transmission frequency of the tire pressure is adjusted from zero to an eighth transmission frequency, wherein the eighth collection rate is greater than the seventh collection rate, the seventh transmission frequency is greater than the fifth transmission frequency, and the eighth transmission frequency is greater than the sixth transmission frequency.

[0016] According to one embodiment of the present application, the adjustment of at least one of the acquisition rate of the tire monitoring data, the acquisition rate of the tire pressure, the transmission frequency of the tire monitoring data, and the transmission frequency of the tire pressure according to the tire pressure of the vehicle further comprises: when the tire pressure monitoring mode is the low-speed mode, if it is determined according to the tire pressure of the vehicle that the vehicle is performing active tire pressure adjustment, adjusting at least one of the acquisition rate of the tire monitoring data, the acquisition rate of the tire pressure, the transmission frequency of the tire monitoring data, and the transmission frequency of the tire pressure according to the tire pressure adjustment working state of the vehicle.

[0017] According to one embodiment of the present application, the adjustment of at least one of the acquisition rate of the tire monitoring data, the acquisition rate of the tire pressure, the transmission frequency of the tire monitoring data, and the transmission frequency of the tire pressure according to the tire pressure adjustment working state of the vehicle comprises: when the vehicle is in the deflation working state, adjusting the acquisition rate of the tire monitoring data from the fifth acquisition rate to the ninth acquisition rate, keeping the acquisition rate of the tire pressure unchanged, adjusting the transmission frequency of the tire monitoring data from the third transmission frequency to the ninth transmission frequency, and adjusting the transmission frequency of the tire pressure from the fourth transmission frequency to the tenth transmission frequency, wherein the ninth acquisition rate is greater than the fifth acquisition rate, the ninth transmission frequency is greater than the third transmission frequency, and the tenth transmission frequency is greater than the fourth transmission frequency; when the vehicle is in the inflation working state, adjusting the acquisition rate of the tire monitoring data from the fifth acquisition rate to the tenth acquisition rate, keeping the acquisition rate of the tire pressure unchanged, adjusting the transmission frequency of the tire monitoring data from the third transmission frequency to the eleventh transmission frequency, and adjusting the transmission frequency of the tire pressure from the fourth transmission frequency to the twelfth transmission frequency, wherein the tenth acquisition rate is greater than the ninth acquisition rate, the eleventh transmission frequency is greater than the ninth transmission frequency, and the twelfth transmission frequency is greater than the tenth transmission frequency.

[0018] According to one embodiment of the present application, the adjustment of at least one of the acquisition rate of the tire monitoring data, the acquisition rate of the tire pressure, the transmission frequency of the tire monitoring data, and the transmission frequency of the tire pressure according to the tire pressure of the vehicle further comprises: when the tire pressure monitoring mode is the driving mode, if it is determined according to the tire pressure of the vehicle that the tire of the vehicle is abnormal, keeping the acquisition rate of the tire monitoring data and the acquisition rate of the tire pressure unchanged, adjusting the transmission frequency of the tire monitoring data from the first transmission frequency to the thirteenth transmission frequency, and adjusting the transmission frequency of the tire pressure from the second transmission frequency to the fourteenth transmission frequency, wherein the thirteenth transmission frequency is greater than the first transmission frequency, and the fourteenth transmission frequency is greater than the second transmission frequency.

[0019] According to one embodiment of the present application, the tire pressure detection method of the vehicle further comprises: when it is determined according to the tire pressure of the vehicle that the vehicle is performing active tire pressure adjustment, or it is determined according to the tire pressure of the vehicle that the tire of the vehicle is abnormal, transmitting corresponding tire pressure information.

[0020] According to an embodiment of the present application, the tire pressure monitoring mode further comprises a storage mode, wherein when the tire pressure monitoring mode is the storage mode, the tire pressure is collected at the eleventh collection rate, and the transmission of the tire pressure is stopped, and when the tire pressure is greater than or equal to the first preset tire pressure value, it is determined that the tire pressure monitoring mode is switched from the storage mode to the parking mode, and when the tire pressure is less than the first preset tire pressure value, it is determined that the tire pressure monitoring mode is switched from the parking mode to the storage mode.

[0021] According to an embodiment of the present application, the tire pressure monitoring mode further comprises an alarm mode, wherein when the tire pressure monitoring mode is any one of the parking mode, the low-speed mode and the running mode, if the tire pressure exceeds the preset tire pressure range, the tire pressure monitoring mode is switched to the alarm mode, and the tire pressure is collected at the twelfth collection rate, and the tire monitoring data is collected at the thirteenth collection rate, and the tire monitoring data is transmitted at the fifteenth transmission frequency, and the tire pressure is transmitted at the sixteenth transmission frequency.

[0022] According to an embodiment of the present application, after the tire monitoring data is transmitted at the fifteenth transmission frequency, and the tire pressure is transmitted at the sixteenth transmission frequency, the tire pressure detection method of the vehicle further comprises: after transmitting the tire pressure data for a preset number of times in succession, switching the tire pressure monitoring mode from the alarm mode back to the tire pressure monitoring mode before the alarm mode.

[0023] According to an embodiment of the present application, the tire pressure detection method of the vehicle further comprises: collecting the power supply power; and adjusting at least one of the collection rate of the tire monitoring data, the collection rate of the tire pressure, the transmission frequency of the tire monitoring data and the transmission frequency of the tire pressure according to the power supply power.

[0024] To achieve the above object, the second embodiment of the present application proposes a tire pressure monitoring controller, comprising a memory, a processor and a tire pressure detection program of a vehicle stored in the memory and executable on the processor, and when the processor executes the tire pressure detection program of the vehicle, the above-mentioned tire pressure detection method of the vehicle is realized.

[0025] The tire pressure monitoring controller according to the embodiments of the present application realizes the above-mentioned tire pressure detection method of the vehicle by executing the tire pressure detection program of the vehicle stored thereon, and based on the above-mentioned tire pressure detection method of the vehicle, the purpose of saving power can be achieved when the tire pressure does not change much or the tire pressure active adjustment system is in standby state, and at the same time, the tire pressure can be collected and transmitted at a suitable frequency when the tire pressure changes greatly or the tire pressure active adjustment system is in working state, so as to ensure the working quality of the tire pressure active adjustment system.

[0026] To achieve the above object, the third aspect of the present application provides a vehicle tire pressure active adjustment system, comprising: a tire pressure adjustment unit, the tire pressure adjustment unit is used for adjusting tire pressure; a tire pressure monitoring unit, the tire pressure monitoring unit is used for monitoring tire pressure; a controller, the controller is the tire pressure monitoring controller.

[0027] According to the vehicle tire pressure active adjustment system of the present application, the tire pressure is adjusted by the tire pressure adjustment unit, the tire pressure is monitored by the tire pressure monitoring unit, and the tire pressure detection method of the vehicle is realized when the tire pressure detection program of the vehicle is stored in the controller. Based on the tire pressure detection method of the vehicle, the purpose of saving power can be achieved when the tire pressure does not change much or the tire pressure active adjustment system is in standby state, and the tire pressure can be collected and transmitted at a suitable frequency when the tire pressure changes greatly or the tire pressure active adjustment system is in working state, so as to ensure the working quality of the tire pressure active adjustment system.

[0028] To achieve the above object, the fourth aspect of the present application provides a vehicle, comprising the vehicle tire pressure active adjustment system.

[0029] According to the vehicle of the present application, based on the vehicle tire pressure active adjustment system, the purpose of saving power can be achieved when the tire pressure does not change much or the tire pressure active adjustment system is in standby state, and the tire pressure can be collected and transmitted at a suitable frequency when the tire pressure changes greatly or the tire pressure active adjustment system is in working state, so as to ensure the working quality of the tire pressure active adjustment system.

[0030] Additional aspects and advantages of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood by practicing the present application. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 Flow chart of the tire pressure detection method of the vehicle according to an embodiment of the present application;

[0032] Figure 2 Schematic diagram of the vehicle tire pressure active adjustment system according to an embodiment of the present application;

[0033] Figure 3 Switching schematic diagram of the tire pressure monitoring mode according to an embodiment of the present application;

[0034] Figure 4 Block schematic diagram of the tire pressure monitoring controller according to an embodiment of the present application;

[0035] Figure 5 Block schematic diagram of the vehicle tire pressure active adjustment system according to an embodiment of the present application;

[0036] Figure 6 This is a block diagram of a vehicle according to one embodiment of the present application. Detailed Implementation

[0037] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0038] The tire pressure detection method, tire pressure monitoring controller, vehicle tire pressure active adjustment system, and vehicle proposed in this application are described below with reference to the accompanying drawings.

[0039] In related technologies, such as Figure 2 As shown, the active tire pressure regulation system consists of an air pump 10, an air valve module 20, tire pressure monitoring sensors installed inside each tire 30, a tire pressure monitoring module 40, a controller 50, and other modules and corresponding system structure air circuits. The controller 50 collects and analyzes various signal data and performs comprehensive control of each subsystem to achieve tire pressure regulation control such as inflation and deflation of the tires 30. The controller 50 communicates with the tire pressure monitoring module 40 via the vehicle's CAN bus. The tire pressure monitoring module 40 receives wireless signals emitted by the tire pressure monitoring sensors located in each tire 30 and forwards them to the controller 50 via the CAN bus to monitor the tire pressure of each tire. Furthermore, the controller 50, as a node on the vehicle's CAN bus, can acquire vehicle signals, including gear position signals, vehicle speed signals, and temperature signals, and communicates with the vehicle's instrument panel and multimedia central control screen.

[0040] The aforementioned active tire pressure regulation system typically controls the tire pressure monitoring sensor with a fixed acquisition and transmission frequency during the control process. Although it can collect and monitor tire pressure, this technical solution lacks flexibility and reduces the system's practicality.

[0041] To address the aforementioned technical issues, this application proposes a method for actively adjusting tire pressure in vehicles. This method adjusts the tire pressure acquisition rate and transmission frequency based on the current tire pressure monitoring mode and tire pressure changes to meet the needs of different scenarios.

[0042] Figure 1 This is a flowchart of a tire pressure detection method for a vehicle according to an embodiment of this application. It should be noted that this tire pressure detection method for a vehicle can be achieved through… Figure 2 The tire pressure monitoring module 40 can be used for implementation, or it can be implemented through the controller 50; there are no restrictions here.

[0043] Reference Figure 1 As shown, the tire pressure detection method for a vehicle according to this application may include the following steps:

[0044] S1, obtain tire pressure monitoring mode;

[0045] S2, collect tire pressure, and adjust the tire pressure collection rate and / or tire pressure transmission frequency according to the changes in tire pressure.

[0046] Specifically, the tire pressure monitoring mode can be determined based on the received control commands or divided according to the vehicle's operating parameters. For example, the tire pressure monitoring mode can be divided according to the vehicle's speed range to ensure that the tire pressure monitoring mode corresponds to the vehicle's operating status and to meet the tire pressure monitoring needs in different scenarios.

[0047] When tire pressure monitoring modes are divided according to vehicle speed ranges, a relationship table between vehicle speed and tire pressure monitoring mode can be pre-set. During application, the current vehicle speed is determined based on the received speed signal, and then the tire pressure monitoring mode is determined by looking up the table. Based on the tire pressure monitoring mode, the corresponding tire pressure sampling rate and tire pressure transmission frequency are determined, and the tire pressure monitoring sensor is controlled to perform tire pressure detection at that sampling rate and transmission frequency. For example, when the tire pressure monitoring mode is determined to be parking mode, a lower tire pressure sampling rate and tire pressure transmission frequency can be used; when the tire pressure monitoring mode is determined to be driving mode, a higher tire pressure sampling rate and tire pressure transmission frequency can be used.

[0048] During the operation of the tire pressure monitoring sensor at the tire pressure acquisition rate and transmission frequency determined according to the tire pressure monitoring mode, the changes in tire pressure are determined based on the acquired tire pressure data. Further adjustments are made to the tire pressure acquisition rate or transmission frequency based on these changes. Alternatively, the acquisition rate and transmission frequency can be adjusted synchronously based on the tire pressure changes; this is not limited here. The tire pressure monitoring sensor is then controlled to operate at the adjusted tire pressure acquisition rate and / or transmission frequency. The tire pressure changes can be determined based on the difference between two adjacent acquired tire pressure values. The sign of the difference indicates the direction of the tire pressure change (e.g., increase or decrease). The absolute value of the difference determines the magnitude of the tire pressure change, thus indicating the tire pressure change rate. For example, when a significant change in tire pressure is detected based on the tire pressure reading, the tire pressure acquisition rate and transmission frequency can be increased to shorten the data acquisition and transmission time interval, ensuring timely data feedback. This allows the active tire pressure regulation system to adjust its actions promptly, ensuring the stability of the vehicle's tire pressure.

[0049] This embodiment adjusts the tire pressure monitoring rate and / or transmission frequency based on the tire pressure monitoring mode and tire pressure changes. On the one hand, it saves power when tire pressure changes are minimal or the active tire pressure regulation system is in standby mode. On the other hand, it improves tire pressure detection accuracy and ensures system control effectiveness when tire pressure changes significantly or the active tire pressure regulation system is active, thus meeting the monitoring and pressure regulation needs under different operating conditions. The standby state of the active tire pressure regulation system refers to the state where tire pressure regulation is not performed, while the active state refers to the state where tire pressure regulation is performed.

[0050] In one embodiment of this application, obtaining a tire pressure monitoring mode includes: collecting tire monitoring data; and determining a tire pressure monitoring mode based on the tire monitoring data. The vehicle tire pressure detection method further includes: adjusting at least one of the following based on changes in tire pressure: the data acquisition rate of the tire monitoring data, the tire pressure acquisition rate, the transmission frequency of the tire monitoring data, and the transmission frequency of the tire pressure.

[0051] Specifically, tire monitoring data can include tire speed, vehicle speed, acceleration, etc. Tire pressure monitoring modes are divided according to the vehicle's tire monitoring data. For example, taking vehicle speed as the tire monitoring data, the tire pressure monitoring modes are divided according to the vehicle speed range to ensure that the tire pressure monitoring mode corresponds to the vehicle's operating status and to meet the tire pressure monitoring needs in different scenarios.

[0052] During application, the tire pressure monitoring mode is determined based on the real-time acquired tire monitoring data. Then, according to the tire pressure monitoring mode, the corresponding tire pressure change is determined, along with the data acquisition rate, tire pressure acquisition rate, data transmission frequency, and tire pressure transmission frequency. The tire pressure monitoring sensor is then controlled to operate according to the aforementioned acquisition rate and transmission frequency.

[0053] During operation, at least one of the following is adjusted based on changes in tire pressure: the data acquisition rate of tire monitoring, the data transmission frequency of tire monitoring, and the transmission frequency of tire pressure.

[0054] During operation, this embodiment can determine and switch the tire pressure monitoring mode in real time based on the tire monitoring data. On the other hand, it can further adjust the data acquisition rate, transmission frequency, and transmission frequency of the tire monitoring data in combination with the tire pressure data to ensure monitoring adaptability.

[0055] Combination Figure 3 As shown, in one embodiment of this application, the tire pressure monitoring mode includes a parking mode, a low-speed mode, and a driving mode. The tire monitoring data includes the centripetal acceleration 'a' of the vehicle tires. Determining the tire pressure monitoring mode based on the tire monitoring data includes: when the centripetal acceleration 'a' is greater than or equal to a first centripetal acceleration threshold 'a1' and less than or equal to a second centripetal acceleration threshold 'a2', if this continues for a first time period t1, then the tire pressure monitoring mode is determined to switch from the parking mode to the low-speed mode; when the centripetal acceleration 'a' is less than the first centripetal acceleration threshold 'a1' and this continues for a second time period t1, then the tire pressure monitoring mode is determined to switch from the parking mode to the low-speed mode. At time 2, the tire pressure monitoring mode is switched from low-speed mode to parking mode. In parking mode, if the centripetal acceleration *a* is greater than the second centripetal acceleration threshold *a2*, the tire pressure monitoring mode is switched from parking mode to driving mode. In low-speed mode, if the centripetal acceleration *a* is greater than the second centripetal acceleration threshold *a2*, the tire pressure monitoring mode is switched from low-speed mode to driving mode. In driving mode, if the centripetal acceleration *a* is less than or equal to the second centripetal acceleration threshold *a2*, the tire pressure monitoring mode is switched from driving mode to low-speed mode. The first centripetal acceleration threshold *a1*, the second centripetal acceleration threshold *a2*, the first time period *t1*, and the second time period *t2* can be set according to actual conditions.

[0056] In other words, this embodiment uses the centripetal acceleration of the vehicle tires as tire monitoring data, and the formula for calculating the centripetal acceleration is:

[0057] a=(V2 / R)+w (1)

[0058] Where V is the vehicle speed, R is the tire radius, and w is the error coefficient.

[0059] During the application process, the vehicle speed is acquired in real time, and the pre-stored tire radius and error coefficient data are called and substituted into formula (1) to calculate the current centripetal acceleration a of the vehicle tire.

[0060] For example, at a vehicle speed of 0 km / h, the calculated acceleration is less than or equal to 1.5g; at a vehicle speed of 30 km / h, the calculated acceleration is greater than or equal to 19g. Based on this, the centripetal acceleration thresholds are set, i.e., the first centripetal acceleration threshold a1 is set to 1.5g, and the second centripetal acceleration threshold a2 is set to 19g. Assume the first time period t1 is 2 minutes and the second time period t2 is 10 minutes. After the vehicle is powered on and started, the tire pressure monitoring sensor initializes the relevant variable values ​​and enters parking mode. It collects data at the tire pressure and tire monitoring data collection rates corresponding to parking mode, and transmits data at the tire pressure and tire monitoring data transmission frequencies corresponding to parking mode. After determining the centripetal acceleration a of the vehicle tires in real time, if a is greater than or equal to 1.5g and less than or equal to 19g, and the duration is greater than or equal to 2 minutes, the tire pressure monitoring mode switches from parking mode to low-speed mode, and collects and transmits data at the data collection rate and transmission frequency corresponding to low-speed mode. Meanwhile, when the tire pressure monitoring mode is in parking mode, if the centripetal acceleration a is determined to be greater than 19g, the mode will switch from parking mode to driving mode, and data will be collected and transmitted at the collection rate and transmission frequency corresponding to driving mode.

[0061] After switching the tire pressure monitoring mode to low-speed mode, if the centripetal acceleration 'a' is determined to be less than 1.5g and the duration 'T' reaches 10 minutes, the tire pressure monitoring mode is switched from low-speed mode to parking mode, and data is collected and transmitted using the acquisition rate and transmission frequency corresponding to parking mode. Conversely, if the centripetal acceleration 'a' is determined to be greater than 19g while the tire pressure monitoring mode is in low-speed mode, the mode is switched to driving mode, and data is collected and transmitted using the acquisition rate and transmission frequency corresponding to driving mode.

[0062] When the tire pressure monitoring mode is in driving mode, if the centripetal acceleration a is less than or equal to 19g, the mode will switch from driving mode to low speed mode, and data will be collected and transmitted at the acquisition rate and transmission frequency corresponding to low speed mode.

[0063] Therefore, this embodiment determines the current tire pressure monitoring mode of the tire pressure monitoring sensor based on centripetal acceleration a, and further switches the tire pressure monitoring mode according to centripetal acceleration a, thereby ensuring the correspondence between the tire pressure monitoring mode and the vehicle operating conditions and improving the tire pressure monitoring effect.

[0064] In one embodiment of this application, at least one of the following is adjusted according to changes in tire pressure: the acquisition rate of tire monitoring data, the acquisition rate of tire pressure, the transmission frequency of tire monitoring data, and the transmission frequency of tire pressure. This includes: when the tire pressure monitoring mode switches from parking mode to driving mode, adjusting the acquisition rate of tire monitoring data from a first acquisition rate V1 to a second acquisition rate V2, adjusting the acquisition rate of tire pressure from a third acquisition rate V3 to a fourth acquisition rate V4, and adjusting the transmission frequency of tire monitoring data from zero to a first transmission frequency F1, and adjusting the transmission frequency of tire pressure from zero to a second transmission frequency F2, wherein the second acquisition rate V2 is less than the first acquisition rate V1, and the fourth acquisition rate V4 is greater than the third acquisition rate V3. When switching the tire pressure monitoring mode from parking mode to low speed mode, the data acquisition rate for tire monitoring is adjusted from the first acquisition rate V1 to the fifth acquisition rate V5, and the data acquisition rate for tire pressure is adjusted from the third acquisition rate V3 to the sixth acquisition rate V6. The transmission frequency for tire monitoring data is adjusted from zero to the third transmission frequency F3, and the transmission frequency for tire pressure is adjusted from zero to the fourth transmission frequency F4. The fifth acquisition rate V5 is lower than the first acquisition rate V1, and the sixth acquisition rate V6 is higher than the third acquisition rate V3. The first acquisition rate V1, second acquisition rate V2, third acquisition rate V3, fourth acquisition rate V4, fifth acquisition rate V5, sixth acquisition rate V6, first transmission frequency F1, second transmission frequency F2, third transmission frequency F3, and fourth transmission frequency F4 can be set according to actual conditions.

[0065] For example, assuming that the tire monitoring data acquisition rate V1 = 15s / time and the tire pressure acquisition rate V3 = 15s / time in parking mode, and the transmission frequency of the tire monitoring data and the tire pressure is zero, then in parking mode, the tire pressure monitoring sensor acquires tire monitoring data and tire pressure every 15 seconds, and never transmits the acquired signal data to the tire pressure monitoring module.

[0066] Assuming that in driving mode, the tire monitoring data acquisition rate V2 = 60s / time, the tire pressure acquisition rate V4 = 5s / time, the tire monitoring data transmission frequency F1 = 60s / time, and the tire pressure transmission frequency F2 = 60s / time, then when switching from parking mode to driving mode, the tire monitoring data acquisition rate is reduced, while the tire pressure acquisition rate is increased. Simultaneously, one data packet (including both tire monitoring data and tire pressure) is transmitted to the tire pressure monitoring module every 60 seconds.

[0067] Assuming that in low-speed mode, the tire pressure monitoring sensor uses a data acquisition rate of V5 = 60 seconds / time for tire monitoring data and V6 = 5 seconds / time for tire pressure data, with a transmission frequency of F3 = 60 seconds / time for tire monitoring data and F4 = 60 seconds / time for tire pressure data. In other words, after switching the tire pressure monitoring mode from parking mode to low-speed mode, the data acquisition rate for tire monitoring data is reduced, while the data acquisition rate for tire pressure data is increased. Simultaneously, one data packet (including both tire monitoring data and tire pressure data) is transmitted to the tire pressure monitoring module every 60 seconds.

[0068] In one embodiment of this application, adjusting at least one of the following based on tire pressure data acquisition rate, tire pressure acquisition rate, tire pressure data transmission frequency, and tire pressure transmission frequency further includes: when the tire pressure monitoring mode is parking mode, if it is determined that the vehicle is performing active tire pressure adjustment based on the tire pressure, then adjusting at least one of the following based on the vehicle's tire pressure adjustment working status: tire pressure acquisition rate, tire pressure acquisition rate, tire pressure data transmission frequency, and tire pressure transmission frequency.

[0069] In other words, when the vehicle is in parking mode, and it is determined that the active tire pressure regulation system is performing active tire pressure regulation on the vehicle tires based on the real-time acquired tire pressure, the tire pressure regulation status of the active tire pressure regulation system is further determined, and at least one of the following is adjusted according to the tire pressure regulation status: the data acquisition rate of the tire monitoring system, the data acquisition rate of the tire pressure system, the transmission frequency of the tire monitoring system, and the transmission frequency of the tire pressure system.

[0070] Active tire pressure regulation (TPM) actions can include inflation, deflation, and pressure maintenance. The corresponding TPM operation states can be inflation, deflation, and pressure maintenance. Whether the vehicle performs active TPM regulation and the corresponding TPM operation state can be determined based on the rate and direction of tire pressure change, and are not limited here. For example, if the tire pressure is determined to increase based on the tire pressure readings, then the TPM operation state is determined to be inflation.

[0071] In one embodiment of this application, at least one of the following adjustments is made according to the vehicle's tire pressure regulation operating state: the tire monitoring data acquisition rate, the tire pressure acquisition rate, the tire monitoring data transmission frequency, and the tire pressure transmission frequency. This includes: when the vehicle is in a deflation state, adjusting the tire pressure acquisition rate from a third acquisition rate V3 to a seventh acquisition rate V7 while maintaining the tire monitoring data acquisition rate unchanged, and adjusting the tire monitoring data transmission frequency from zero to a fifth transmission frequency F5, and adjusting the tire pressure transmission frequency from zero to a sixth transmission frequency F6, wherein the seventh acquisition rate V7 is greater than the third acquisition rate V3; when the vehicle is in an inflation state, adjusting the tire pressure acquisition rate from a third acquisition rate V3 to an eighth acquisition rate V8 while maintaining the tire monitoring data acquisition rate unchanged, and adjusting the tire monitoring data transmission frequency from zero to a seventh transmission frequency F7, and adjusting the tire pressure transmission frequency from zero to an eighth transmission frequency F8, wherein the eighth acquisition rate V8 is greater than the seventh acquisition rate V7, the seventh transmission frequency F7 is greater than the fifth transmission frequency F5, and the eighth transmission frequency F8 is greater than the sixth transmission frequency F6.

[0072] Continuing with the example in parking mode, the tire monitoring data acquisition rate V1 = 15s / time, the tire pressure acquisition rate V3 = 15s / time, and the transmission frequency of both tire monitoring data and tire pressure data is zero. Assume the seventh acquisition rate V7 = 8s / time, the fifth transmission frequency F5 = 8s / time, the sixth transmission frequency F6 = 8s / time, the eighth acquisition rate V8 = 5s / time, the seventh transmission frequency F7 = 5s / time, and the eighth transmission frequency F8 = 5s / time. The tire pressure threshold used to determine whether the vehicle is actively adjusting tire pressure is 5kPa.

[0073] Specifically, if the absolute value of the tire pressure difference determined by the two consecutive tire pressure measurements, |△P|, is less than 5 kPa, it is determined that the active tire pressure monitoring system is in standby mode, that is, the system does not control the inflation or deflation of the tires, and the vehicle does not actively adjust the tire pressure. At this time, the tire pressure monitoring sensor maintains a constant acquisition rate and never transmits the acquired signal data to the tire pressure monitoring module. That is, the acquisition rate of tire monitoring data, V1, is maintained at 15 s / time, the acquisition rate of tire pressure, V3, is maintained at 15 s / time, and the transmission frequency of tire monitoring data and tire pressure is zero.

[0074] If |△P|≥5kPa, it is determined that the active tire pressure system is in working condition, that is, the active tire pressure system is controlling the inflation or deflation of the tire, and the vehicle is actively adjusting the tire pressure. The tire pressure monitoring sensor identifies whether the tire is currently in an inflated state or a deflated (or leaking) state based on the characteristic that the inflation rate of the system is greater than the deflation rate, so as to determine the working status of the vehicle's tire pressure adjustment.

[0075] Specifically, when △P≤-5kpa is determined, the tire is currently in a deflated (or leaking) state, that is, the vehicle is in a deflated working state. The tire pressure monitoring sensor's collection rate of tire pressure is increased from once every 15 seconds to once every 8 seconds, while the collection rate of tire monitoring data remains unchanged. The transmission frequency of tire monitoring data is increased from never transmitting data to transmitting one packet of data every 8 seconds, and the transmission frequency of tire pressure data is increased from never transmitting data to transmitting one packet of data every 8 seconds.

[0076] When △P≥5kpa is determined, the tire is currently in an inflated state, that is, the vehicle is in an inflated working state. The tire pressure collection rate is increased from once every 15 seconds to once every 5 seconds, while the tire monitoring data collection rate remains unchanged. The transmission frequency of tire monitoring data is increased from never transmitting data to transmitting one packet of data every 5 seconds, and the transmission frequency of tire pressure data is increased from never transmitting data to transmitting one packet of data every 5 seconds.

[0077] In one embodiment of this application, adjusting at least one of the following based on tire pressure data acquisition rate, tire pressure acquisition rate, tire pressure data transmission frequency, and tire pressure transmission frequency further includes: when the tire pressure monitoring mode is in low-speed mode, if it is determined that the vehicle is performing active tire pressure adjustment based on tire pressure, then adjusting at least one of the following based on the vehicle's tire pressure adjustment operating status: tire pressure acquisition rate, tire pressure acquisition rate, tire pressure data transmission frequency, and tire pressure transmission frequency.

[0078] In other words, when in low-speed mode, if it is determined that the active tire pressure regulation system is performing active tire pressure regulation on the vehicle tires based on the real-time acquired tire pressure, the tire pressure regulation status of the active tire pressure regulation system is further determined, and at least one of the following is adjusted according to the tire pressure regulation status: the acquisition rate of tire monitoring data, the acquisition rate of tire pressure, the transmission frequency of tire monitoring data, and the transmission frequency of tire pressure.

[0079] In one embodiment of this application, at least one of the following adjustments is made according to the vehicle's tire pressure regulation operating state: the tire monitoring data acquisition rate, the tire pressure acquisition rate, the tire monitoring data transmission frequency, and the tire pressure transmission frequency. This includes: when the vehicle is in a deflation state, adjusting the tire monitoring data acquisition rate from a fifth acquisition rate V5 to a ninth acquisition rate V9, while keeping the tire pressure acquisition rate unchanged; adjusting the tire monitoring data transmission frequency from a third transmission frequency F3 to a ninth transmission frequency F9; and adjusting the tire pressure transmission frequency from a fourth transmission frequency F4 to a tenth transmission frequency F10. The ninth acquisition rate V9 is greater than the fifth acquisition rate V5, and the ninth transmission frequency is greater than the fifth transmission rate V5. Frequency F9 is greater than the third transmission frequency F3, and the tenth transmission frequency F10 is greater than the fourth transmission frequency F4. When the vehicle is in the inflation state, the acquisition rate of tire monitoring data is adjusted from the fifth acquisition rate V5 to the tenth acquisition rate V10, while keeping the tire pressure acquisition rate unchanged. The transmission frequency of tire monitoring data is adjusted from the third transmission frequency F3 to the eleventh transmission frequency F11, and the transmission frequency of tire pressure is adjusted from the fourth transmission frequency F4 to the twelfth transmission frequency F12. Among these, the tenth acquisition rate V10 is greater than the ninth acquisition rate V9, the eleventh transmission frequency F11 is greater than the ninth transmission frequency F9, and the twelfth transmission frequency F12 is greater than the tenth transmission frequency F10.

[0080] Continuing with the example of the tire monitoring data acquisition rate V5 = 60s / time, the tire pressure acquisition rate V4 = 5s / time, the tire monitoring data transmission frequency F3 = 60s / time, the tire pressure transmission frequency F4 = 60s / time, and the tire pressure threshold used to determine whether the vehicle is actively adjusting tire pressure as 5kPa, let's assume the ninth acquisition rate V9 = 15s / time, the ninth transmission frequency F9 = 8s / time, the tenth transmission frequency F10 = 8s / time, the tenth acquisition rate V10 = 10s / time, the eleventh transmission frequency F11 = 5s / time, and the twelfth transmission frequency F12 = 5s / time in parking mode.

[0081] Specifically, if the absolute value of the tire pressure difference determined by the two consecutive tire pressure measurements, |△P|, is less than 5 kPa, it is determined that the active tire pressure monitoring system is in standby mode, that is, the vehicle has not actively adjusted the tire pressure. At this time, the tire pressure monitoring sensor always maintains a constant acquisition rate and transmission frequency, that is, the tire monitoring data acquisition rate is 60 s / time, the tire pressure acquisition rate is 5 s / time, and the tire monitoring data transmission frequency is 60 s / time and the tire pressure transmission frequency is 60 s / time.

[0082] If |△P|≥5kPa, the active tire pressure monitoring system is considered to be in operation, meaning the vehicle is actively adjusting tire pressure. The tire pressure monitoring sensor identifies whether the tire is currently inflated or deflated (or leaking) based on the characteristic that the inflation rate of the system is greater than the deflation rate, thus determining the tire pressure adjustment status of the vehicle.

[0083] Specifically, when △P≤-5kpa is determined, the tire is currently in a deflated (or leaking) state, that is, the vehicle is in a deflated working state. Then, the tire pressure collection rate is maintained, the tire monitoring data collection rate is increased from once every 60 seconds to once every 15 seconds, and the tire pressure and tire monitoring data transmission frequency is increased from one packet of data every 60 seconds to one packet of data every 8 seconds.

[0084] When △P≥5kpa is determined, the tire is currently in an inflated state, that is, the vehicle is in an inflated working state. The tire pressure collection rate is kept constant, the tire monitoring data collection rate is increased from once every 60 seconds to once every 10 seconds, and the transmission frequency of tire monitoring data and tire pressure is increased from one packet of data every 60 seconds to one packet of data every 5 seconds.

[0085] In one embodiment of this application, adjusting at least one of the following based on tire pressure data acquisition rate, tire pressure acquisition rate, tire pressure data transmission frequency, and tire pressure transmission frequency further includes: when the tire pressure monitoring mode is driving mode, if a tire abnormality is determined based on the tire pressure, then keeping the tire pressure data acquisition rate and tire pressure acquisition rate unchanged, and adjusting the tire pressure data transmission frequency from a first transmission frequency F1 to a thirteenth transmission frequency F13, and adjusting the tire pressure transmission frequency from a second transmission frequency F2 to a fourteenth transmission frequency F14, wherein the thirteenth transmission frequency F13 is greater than the first transmission frequency F1, and the fourteenth transmission frequency F14 is greater than the second transmission frequency F2.

[0086] Continuing with the example of tire monitoring data acquisition rate V2 = 60s / time, tire pressure acquisition rate V4 = 5s / time, tire monitoring data transmission frequency F1 = 60s / time, tire pressure transmission frequency F2 = 60s / time, and the tire pressure threshold used to determine whether the vehicle is actively adjusting tire pressure as 5kPa. Assume the thirteenth transmission frequency F13 = 5s / time and the fourteenth transmission frequency F14 = 5s / time.

[0087] When the tire pressure monitoring sensor is in driving mode, the active tire pressure regulation system is always in standby mode and there is no control over the inflation or deflation of the tires. Therefore, if a large change in tire pressure is detected in driving mode, it is determined that the tire is leaking air, possibly due to a nail puncture, thus confirming a tire malfunction.

[0088] Specifically, when the tire pressure monitoring sensor is in driving mode, if |△P| < 5 kPa, it is determined that the tire is in normal condition, with no air leakage or nail puncture. The tire pressure monitoring sensor always maintains a constant acquisition rate and transmission frequency, that is, the acquisition rate of tire monitoring data is 60 seconds / time, the acquisition rate of tire pressure is 5 seconds / time, and the transmission frequency of tire monitoring data is 60 seconds / time and the transmission frequency of tire pressure is 60 seconds / time.

[0089] When |△P|≥5kPa, the tire is determined to be leaking air, possibly due to a nail puncture. This indicates a tire malfunction. In this case, the tire pressure and tire monitoring data acquisition rate remains unchanged, but the transmission frequency of tire monitoring data and tire pressure data is increased from one packet of data every 60 seconds to one packet of data every 5 seconds.

[0090] In one embodiment of this application, the vehicle tire pressure detection method further includes: transmitting corresponding tire pressure information when it is determined that the vehicle is to perform active tire pressure adjustment based on the tire pressure, or when it is determined that the vehicle's tires are abnormal based on the tire pressure.

[0091] For example, when the tire pressure monitoring system is in parking or low-speed mode, if |△P| ≥ 5 kPa, the active tire pressure system is considered to be active, meaning the system is controlling tire inflation or deflation. The tire pressure monitoring sensor will immediately send a signal indicating a change in tire pressure to the tire pressure monitoring module. Furthermore, the transmitted tire pressure information can be further refined based on the tire pressure changes. For instance, if △P ≤ -5 kPa, it indicates the tire is currently deflated (or leaking), and the tire pressure monitoring sensor will immediately send a signal indicating the tire is currently deflated (or leaking); if △P ≥ 5 kPa, it indicates the tire is currently inflated, and the tire pressure monitoring sensor will immediately send a signal indicating the tire is currently inflated.

[0092] In driving mode, when |△P|≥5kPa, if the vehicle's tires are found to be abnormal, the tire pressure monitoring sensor will immediately send a packet of data indicating that "the tire is currently leaking air" to the tire pressure monitoring module.

[0093] It should be noted that tire pressure information can include tire pressure values ​​that determine changes in tire pressure, or code information corresponding to the status; there is no limitation here.

[0094] In this embodiment, when determining whether to actively adjust the tire pressure of a vehicle based on the tire pressure, or when determining whether the tires of a vehicle are abnormal based on the tire pressure, the tire pressure monitoring sensor first transmits the corresponding tire pressure information to the tire pressure monitoring module, and then transmits the tire pressure and tire monitoring data according to the adjusted transmission frequency.

[0095] In one embodiment of this application, the tire pressure monitoring mode further includes a storage mode. When the tire pressure monitoring mode is in storage mode, tire pressure is collected using an eleventh acquisition rate V11, and tire pressure transmission is stopped. Furthermore, when the tire pressure is greater than or equal to a first preset tire pressure value P1, the tire pressure monitoring mode is switched from storage mode to parking mode; when the tire pressure is less than the first preset tire pressure value P1, the tire pressure monitoring mode is switched from parking mode to storage mode. The eleventh acquisition rate V11 and the first preset tire pressure value P1 can be set according to actual conditions.

[0096] Taking the eleventh sampling rate V11 = 120s / time and the first preset tire pressure value P1 = 80kPa as an example.

[0097] When the tire pressure monitoring sensor (TPMS) is powered on, it initializes the relevant variable values. After initialization, it enters storage mode. In this mode, the TPMS signal acquisition strategy is as follows: it collects tire pressure data every 120 seconds but does not transmit the collected data to the TPMS module, minimizing power consumption. Simultaneously, while in storage mode, if the collected tire pressure P ≥ 80 kPa, the TPMS enters parking mode. If the collected tire pressure P < 80 kPa while in parking mode, the TPMS returns to storage mode.

[0098] It should be noted that when the tire pressure monitoring sensor switches from parking mode to storage mode, it can be controlled to immediately send a packet of "return to storage mode" status data to the tire pressure monitoring module.

[0099] In one embodiment of this application, the tire pressure monitoring mode further includes an alarm mode. When the tire pressure monitoring mode is any one of parking mode, low-speed mode, and driving mode, if the tire pressure exceeds a preset range, the tire pressure monitoring mode switches to alarm mode. Tire pressure is then collected at a twelfth sampling rate V12 and a thirteenth sampling rate V13. The tire pressure data is transmitted at a fifteenth transmission frequency F15 and a sixteenth transmission frequency F16. The twelfth sampling rate V12, the thirteenth sampling rate V13, the fifteenth transmission frequency F15, and the sixteenth transmission frequency F16 can be set according to actual conditions.

[0100] Specifically, assuming the twelfth acquisition rate V12 = 1s / time, the thirteenth acquisition rate V13 = 15s / time, the fifteenth transmission frequency F15 = 1s / time, and the sixteenth transmission frequency F16 = 1s / time. The upper limit of the preset tire pressure range is the overpressure alarm value, and the lower limit is the underpressure alarm value. The overpressure alarm value and underpressure alarm value can be set according to the characteristics of the active tire pressure system. For example, the underpressure alarm value can be set to 100kPa and the overpressure alarm value to 300kPa, then the preset tire pressure range is [100kPa, 300kPa].

[0101] When the tire pressure monitoring sensor is in parking mode, low speed mode, or driving mode, it compares the collected tire pressure with the preset tire pressure range. When it is determined that the collected tire pressure is not within the preset tire pressure range, the tire pressure monitoring mode is switched to alarm mode. The tire pressure monitoring sensor implements a control strategy of sampling tire pressure once per second, sampling tire monitoring data once every 15 seconds, and transmitting a packet of alarm data once per second. The alarm data may include tire monitoring data and tire pressure. In this embodiment, the tire monitoring data and tire pressure are sent together, but they can also be sent separately. There is no limitation here.

[0102] In one embodiment of this application, after transmitting tire monitoring data using the fifteenth transmission frequency F15 and transmitting tire pressure using the sixteenth transmission frequency F16, the tire pressure detection method for the vehicle further includes: after continuously transmitting tire pressure data a preset number of times, switching the tire pressure monitoring mode from the alarm mode back to the previous tire pressure monitoring mode.

[0103] Tire pressure data can be just tire pressure, or it can include both tire pressure and tire monitoring data. Whether the number of transmissions has reached the preset number can be determined by the number of transmissions of tire pressure data alone, or by the number of transmissions of both tire pressure and tire monitoring data. That is, when the number of consecutive transmissions of both data reaches the preset number, the preset number of consecutive transmissions of tire pressure data is determined. There is no restriction here.

[0104] Specifically, taking a preset count of 30 times as an example, in alarm mode, the tire pressure monitoring sensor executes a control strategy of sampling tire pressure once per second, sampling tire monitoring data once every 15 seconds, and transmitting one packet of alarm data per second. In this embodiment, the tire pressure and tire monitoring data are packaged into a single data packet for transmission. After continuously transmitting 30 data packets, the tire pressure monitoring mode is switched back from alarm mode to the previous tire pressure monitoring mode. For example, if the vehicle was in parking mode before entering alarm mode, it returns to parking mode; if the vehicle was in low-speed mode before entering alarm mode, it returns to low-speed mode; if the vehicle was in driving mode before entering alarm mode, it returns to driving mode.

[0105] In one embodiment of this application, the tire pressure detection method for a vehicle further includes: collecting power supply data; and adjusting at least one of the following based on the power supply data: the data acquisition rate of the tire monitoring data, the data acquisition rate of the tire pressure, the transmission frequency of the tire monitoring data, and the transmission frequency of the tire pressure.

[0106] Specifically, in this embodiment, the tire pressure monitoring sensor has the function of monitoring its own power level. For example, based on the power consumption, the power level can be divided into five levels. In parking mode, low speed mode, driving mode, and alarm mode, the sensor actively adjusts the acquisition rate and transmission frequency of tire monitoring data and tire pressure according to the power level, thereby reducing the sensor's own power consumption and extending battery life. Assume the five power level levels are: first power level, second power level, third power level, fourth power level, and fifth power level.

[0107] The tire pressure monitoring sensor monitors the power level in different operating modes and, based on the current power level and a preset conversion method, adjusts the signal acquisition rate and data transmission frequency accordingly. The adjustment settings are illustrated below with examples.

[0108] When the power supply is at 80%-100%, it is determined that the power supply is in the first power level state. Then, according to the above control strategy, at least one of the following is adjusted: the data acquisition rate of tire monitoring data, the data acquisition rate of tire pressure, the transmission frequency of tire monitoring data, and the transmission frequency of tire pressure.

[0109] When the power supply is between 60% and 80%, it is determined that the power supply is in the second power level state. Then, according to the preset conversion method for different operating modes in the second power level state, the power supply is adjusted to reduce the frequency of at least one of the following: the data acquisition rate of tire monitoring, the data acquisition rate of tire pressure, the transmission frequency of tire monitoring data, and the transmission frequency of tire pressure. The specific formula for the frequency reduction adjustment method is: T2 = T1 + T1 * (1 - 80%), where T2 is the interval time of the corresponding frequency after the frequency reduction adjustment according to the second power level, and T1 is the interval time of the corresponding frequency in the fully charged state, i.e., the first power level state.

[0110] When the power supply is between 40% and 60%, it is determined that the power supply is in the third power level state. Then, according to the preset conversion method for different operating modes in the third power level state, the power supply is adjusted to reduce the frequency of at least one of the following: the data acquisition rate of tire monitoring, the data acquisition rate of tire pressure, the transmission frequency of tire monitoring data, and the transmission frequency of tire pressure. The specific formula for the frequency reduction adjustment method is: T3 = T1 + T1 * (1 - 60%), where T3 is the interval time of the corresponding frequency after the frequency reduction adjustment according to the third power level, and T1 is the interval time of the corresponding frequency in the fully charged state, i.e., the first power level state.

[0111] When the power supply is between 20% and 40%, it is determined that the power supply is in the fourth power level state. Then, according to the preset conversion method for different operating modes in the fourth power level state, the power supply is adjusted to reduce the frequency of at least one of the following: the data acquisition rate of tire monitoring, the data acquisition rate of tire pressure, the transmission frequency of tire monitoring data, and the transmission frequency of tire pressure. The specific formula for the frequency reduction adjustment method is: T4 = T1 + T1 * (1 - 40%), where T4 is the interval time of the corresponding frequency after the frequency reduction adjustment according to the fourth power level, and T1 is the interval time of the corresponding frequency in the fully charged state, i.e., the first power level state.

[0112] When the power supply is between 10% and 20%, it is determined that the power supply is in the fifth power level state. Then, according to the preset conversion method for different operating modes in the fifth power level state, the power supply is adjusted by down-regulating at least one of the following: the data acquisition rate of tire monitoring data, the data acquisition rate of tire pressure, the transmission frequency of tire monitoring data, and the transmission frequency of tire pressure. Simultaneously, a "sensor power low" data packet is sent to the tire pressure monitoring module. The specific formula for the down-regulation method is: T5 = T1 + T1 * (1 - 20%), where T5 is the interval time of the corresponding frequency after down-regulation according to the fifth power level, and T1 is the interval time of the corresponding frequency in the fully charged state, i.e., the first power level state.

[0113] Furthermore, the tire pressure detection method of this application combines the characteristics of the inflation and deflation rates of the active tire pressure regulation system, the vehicle speed requirements during the operation of the active tire pressure regulation system, the vehicle tire diameter, and other data, as well as the power consumption limitations of the tire pressure monitoring sensor, to adjust the acquisition rate and transmission frequency during the tire pressure detection process. This not only meets the requirement of saving power when the tire pressure does not change significantly or when the active tire pressure regulation system is in standby mode, but also meets the special requirement of acquiring signals and transmitting data at an appropriate frequency when the tire pressure changes significantly or when the active tire pressure regulation system is in operation, enabling the entire active tire pressure regulation system to achieve accurate identification.

[0114] In summary, the tire pressure detection method for vehicles according to the embodiments of this application first acquires the tire pressure monitoring mode, then collects tire pressure, and adjusts the tire pressure collection rate and / or tire pressure transmission frequency based on changes in tire pressure. Therefore, this method adjusts the tire pressure collection rate and tire pressure transmission frequency according to the current tire pressure monitoring mode and tire pressure changes. This achieves power saving when tire pressure remains relatively stable or the active tire pressure regulation system is in standby mode, while also ensuring the quality of tire pressure collection and transmission at an appropriate frequency when tire pressure changes significantly or the active tire pressure regulation system is active.

[0115] Corresponding to the above embodiments, this application also proposes a tire pressure monitoring controller.

[0116] like Figure 4 As shown, the tire pressure monitoring controller 100 of this application embodiment includes a memory 110, a processor 120, and a vehicle tire pressure detection program stored in the memory 110 and executable on the processor 120. When the processor 120 executes the vehicle tire pressure detection program, it implements the above-described vehicle tire pressure detection method.

[0117] According to the tire pressure monitoring controller of this application embodiment, the above-mentioned vehicle tire pressure detection method is implemented by executing the vehicle tire pressure detection program stored thereon. Based on the aforementioned vehicle tire pressure detection method, it can save power when the tire pressure does not change much or the active tire pressure regulation system is in standby mode. At the same time, it can collect and transmit tire pressure at an appropriate frequency when the tire pressure changes significantly or the active tire pressure regulation system is in working mode, so as to ensure the working quality of the active tire pressure regulation system.

[0118] Corresponding to the above embodiments, this application also proposes a vehicle tire pressure active regulation system.

[0119] like Figure 5 As shown, the vehicle tire pressure active adjustment system of this application embodiment may include: tire pressure adjustment unit 60, tire pressure monitoring unit 70 and controller 80.

[0120] The tire pressure regulating unit 60 is used to regulate tire pressure. The tire pressure monitoring unit 70 is used to monitor tire pressure. The controller 80 is the aforementioned tire pressure monitoring controller.

[0121] According to the vehicle tire pressure active regulation system of this application embodiment, the tire pressure is adjusted by the tire pressure regulation unit and monitored by the tire pressure monitoring unit. The controller implements the above-mentioned vehicle tire pressure detection method when storing the vehicle tire pressure detection program thereon. Based on the aforementioned vehicle tire pressure detection method, it can save power when the tire pressure does not change much or when the tire pressure active regulation system is in standby mode. At the same time, it can collect and transmit tire pressure at an appropriate frequency when the tire pressure changes significantly or when the tire pressure active regulation system is in working mode, so as to ensure the working quality of the tire pressure active regulation system.

[0122] Corresponding to the above embodiments, this application also proposes a vehicle.

[0123] like Figure 6 As shown, the vehicle 1000 in this embodiment includes the above-described active tire pressure regulation system 1100.

[0124] According to the vehicle embodiment of this application, based on the above-mentioned active tire pressure regulation system, it can save power when the tire pressure does not change much or when the active tire pressure regulation system is in standby mode. At the same time, it can collect and transmit tire pressure at an appropriate frequency when the tire pressure changes significantly or when the active tire pressure regulation system is in working mode, so as to ensure the working quality of the active tire pressure regulation system.

[0125] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0126] It should be understood that various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0127] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0128] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0129] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0130] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A method for detecting tire pressure in a vehicle, characterized in that, The method includes: Get tire pressure monitoring mode; Collect tire pressure data, and adjust the tire pressure collection rate and / or the tire pressure transmission frequency based on changes in tire pressure. The tire pressure monitoring modes include: Collect fetal monitoring data; The tire pressure monitoring mode is determined based on the tire monitoring data. The method further includes: Based on the changes in tire pressure, at least one of the following is adjusted: the acquisition rate of the tire monitoring data, the acquisition rate of the tire pressure, the transmission frequency of the tire monitoring data, and the transmission frequency of the tire pressure. The tire pressure monitoring modes include a parking mode and a storage mode, wherein... When the tire pressure monitoring mode is in storage mode, the tire pressure is collected at the eleventh acquisition rate, and the transmission of the tire pressure is stopped. When the tire pressure is greater than or equal to the first preset tire pressure value, the tire pressure monitoring mode is switched from the storage mode to the parking mode. When the tire pressure is less than the first preset tire pressure value, the tire pressure monitoring mode is switched from the parking mode to the storage mode.

2. The tire pressure detection method according to claim 1, characterized in that, The tire pressure monitoring mode also includes a low-speed mode and a driving mode. The tire monitoring data includes the centripetal acceleration of the vehicle tires. Determining the tire pressure monitoring mode based on the tire monitoring data includes: When the centripetal acceleration is greater than or equal to the first centripetal acceleration threshold and less than or equal to the second centripetal acceleration threshold, if this continues for a first time period, it is determined that the tire pressure monitoring mode switches from the parking mode to the low speed mode. When the centripetal acceleration is less than the first centripetal acceleration threshold and continues for a second period of time, the tire pressure monitoring mode is determined to switch from the low speed mode to the parking mode. In the parking mode, if the centripetal acceleration is greater than the second centripetal acceleration threshold, the tire pressure monitoring mode is determined to switch from the parking mode to the driving mode. In the low-speed mode, if the centripetal acceleration is greater than the second centripetal acceleration threshold, the tire pressure monitoring mode is determined to switch from the low-speed mode to the driving mode. In the driving mode, if the centripetal acceleration is less than or equal to a second centripetal acceleration threshold, the tire pressure monitoring mode is determined to switch from the driving mode to the low-speed mode.

3. The tire pressure detection method according to claim 2, characterized in that, Adjusting at least one of the following based on changes in tire pressure: the data acquisition rate of the tire monitoring data, the data acquisition rate of the tire pressure, the transmission frequency of the tire monitoring data, and the transmission frequency of the tire pressure; including: When the tire pressure monitoring mode switches from the parking mode to the driving mode, the acquisition rate of the tire monitoring data is adjusted from the first acquisition rate to the second acquisition rate, and the acquisition rate of the tire pressure is adjusted from the third acquisition rate to the fourth acquisition rate. The transmission frequency of the tire monitoring data is adjusted from zero to the first transmission frequency, and the transmission frequency of the tire pressure is adjusted from zero to the second transmission frequency. The second acquisition rate is less than the first acquisition rate, and the fourth acquisition rate is greater than the third acquisition rate. When the tire pressure monitoring mode switches from the parking mode to the low speed mode, the acquisition rate of the tire monitoring data is adjusted from the first acquisition rate to the fifth acquisition rate, the acquisition rate of the tire pressure is adjusted from the third acquisition rate to the sixth acquisition rate, the transmission frequency of the tire monitoring data is adjusted from zero to the third transmission frequency, and the transmission frequency of the tire pressure is adjusted from zero to the fourth transmission frequency. The fifth acquisition rate is less than the first acquisition rate, and the sixth acquisition rate is greater than the third acquisition rate.

4. The tire pressure detection method according to claim 3, characterized in that, Adjusting at least one of the following based on the tire pressure: the acquisition rate of the tire monitoring data, the acquisition rate of the tire pressure, the transmission frequency of the tire monitoring data, and the transmission frequency of the tire pressure; further comprising: When the tire pressure monitoring mode is the parking mode, if it is determined that the vehicle is performing active tire pressure adjustment based on the tire pressure, then at least one of the following is adjusted according to the tire pressure adjustment working status of the vehicle: the acquisition rate of the tire monitoring data, the acquisition rate of the tire pressure, the transmission frequency of the tire monitoring data, and the transmission frequency of the tire pressure.

5. The tire pressure detection method according to claim 4, characterized in that, Adjusting at least one of the following based on the vehicle's tire pressure regulation operating status: the data acquisition rate of the tire monitoring data, the data acquisition rate of the tire pressure, the transmission frequency of the tire monitoring data, and the transmission frequency of the tire pressure, including: When the vehicle is in the deflation working state, the sampling rate of the tire pressure is adjusted from the third sampling rate to the seventh sampling rate, while keeping the sampling rate of the tire monitoring data unchanged, and the transmission frequency of the tire monitoring data is adjusted from zero to the fifth transmission frequency, and the transmission frequency of the tire pressure is adjusted from zero to the sixth transmission frequency, wherein the seventh sampling rate is greater than the third sampling rate. When the vehicle is in the inflation state, the tire pressure acquisition rate is adjusted from the third acquisition rate to the eighth acquisition rate, while keeping the tire monitoring data acquisition rate unchanged. The transmission frequency of the tire monitoring data is adjusted from zero to the seventh transmission frequency, and the transmission frequency of the tire pressure is adjusted from zero to the eighth transmission frequency. The eighth acquisition rate is greater than the seventh acquisition rate, the seventh transmission frequency is greater than the fifth transmission frequency, and the eighth transmission frequency is greater than the sixth transmission frequency.

6. The tire pressure detection method according to claim 3, characterized in that, Adjusting at least one of the following based on the tire pressure: the acquisition rate of the tire monitoring data, the acquisition rate of the tire pressure, the transmission frequency of the tire monitoring data, and the transmission frequency of the tire pressure; further comprising: When the tire pressure monitoring mode is the low-speed mode, if it is determined that the vehicle is performing active tire pressure adjustment based on the tire pressure, then at least one of the following is adjusted according to the tire pressure adjustment working status of the vehicle: the acquisition rate of the tire monitoring data, the acquisition rate of the tire pressure, the transmission frequency of the tire monitoring data, and the transmission frequency of the tire pressure.

7. The tire pressure detection method according to claim 6, characterized in that, Adjusting at least one of the following based on the vehicle's tire pressure regulation operating status: the data acquisition rate of the tire monitoring data, the data acquisition rate of the tire pressure, the transmission frequency of the tire monitoring data, and the transmission frequency of the tire pressure, including: When the vehicle is in the deflation working state, the acquisition rate of the tire monitoring data is adjusted from the fifth acquisition rate to the ninth acquisition rate, while the acquisition rate of the tire pressure remains unchanged. The transmission frequency of the tire monitoring data is adjusted from the third transmission frequency to the ninth transmission frequency, and the transmission frequency of the tire pressure is adjusted from the fourth transmission frequency to the tenth transmission frequency. The ninth acquisition rate is greater than the fifth acquisition rate, the ninth transmission frequency is greater than the third transmission frequency, and the tenth transmission frequency is greater than the fourth transmission frequency. When the vehicle is in the inflation state, the acquisition rate of the tire monitoring data is adjusted from the fifth acquisition rate to the tenth acquisition rate, while the acquisition rate of the tire pressure remains unchanged. The transmission frequency of the tire monitoring data is adjusted from the third transmission frequency to the eleventh transmission frequency, and the transmission frequency of the tire pressure data is adjusted from the fourth transmission frequency to the twelfth transmission frequency. The tenth acquisition rate is greater than the ninth acquisition rate, the eleventh transmission frequency is greater than the ninth transmission frequency, and the twelfth transmission frequency is greater than the tenth transmission frequency.

8. The tire pressure detection method according to claim 6, characterized in that, Adjusting at least one of the following based on the tire pressure: the acquisition rate of the tire monitoring data, the acquisition rate of the tire pressure, the transmission frequency of the tire monitoring data, and the transmission frequency of the tire pressure; further comprising: When the tire pressure monitoring mode is the driving mode, if a tire abnormality is determined based on the tire pressure, the acquisition rate of the tire monitoring data and the acquisition rate of the tire pressure remain unchanged, and the transmission frequency of the tire monitoring data is adjusted from the first transmission frequency to the thirteenth transmission frequency, and the transmission frequency of the tire pressure is adjusted from the second transmission frequency to the fourteenth transmission frequency, wherein the thirteenth transmission frequency is greater than the first transmission frequency, and the fourteenth transmission frequency is greater than the second transmission frequency.

9. The tire pressure detection method according to claim 8, characterized in that, The method further includes: When determining that the vehicle needs to perform active tire pressure adjustment based on the tire pressure, or when determining that the vehicle's tires are abnormal based on the tire pressure, the corresponding tire pressure information is transmitted.

10. The tire pressure detection method according to claim 1, characterized in that, The tire pressure monitoring modes also include an alarm mode, a low-speed mode, and a driving mode, among which... When the tire pressure monitoring mode is any one of the parking mode, the low speed mode, and the driving mode, if the tire pressure exceeds the preset tire pressure range, the tire pressure monitoring mode switches to the alarm mode, and the tire pressure is collected at the twelfth acquisition rate and the tire monitoring data is collected at the thirteenth acquisition rate, and the tire monitoring data is transmitted at the fifteenth transmission frequency, and the tire pressure is transmitted at the sixteenth transmission frequency.

11. The tire pressure detection method according to claim 10, characterized in that, After transmitting the tire monitoring data using the fifteenth transmission frequency and transmitting the tire pressure using the sixteenth transmission frequency, the method further includes: After transmitting tire pressure data a preset number of times, the tire pressure monitoring mode is switched back from the alarm mode to the previous tire pressure monitoring mode.

12. The tire pressure detection method according to any one of claims 1-11, characterized in that, The method further includes: Collect power supply data; The power supply level is used to adjust at least one of the following: the acquisition rate of the tire monitoring data, the acquisition rate of the tire pressure, the transmission frequency of the tire monitoring data, and the transmission frequency of the tire pressure.

13. A tire pressure monitoring controller, characterized in that, The system includes a memory, a processor, and a vehicle tire pressure monitoring program stored in the memory and executable on the processor. When the processor executes the vehicle tire pressure monitoring program, it implements the vehicle tire pressure monitoring method according to any one of claims 1-12.

14. A vehicle tire pressure active regulation system, characterized in that, include: A tire pressure regulating unit, wherein the tire pressure regulating unit is used to regulate the tire pressure; A tire pressure monitoring unit, wherein the tire pressure monitoring unit is used to monitor the tire pressure of the tire; The controller is the tire pressure monitoring controller according to claim 13.

15. A vehicle, characterized in that, Includes the vehicle tire pressure active regulation system as described in claim 14.

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