Positioning system and positioning method of tire pressure sensor and vehicle

Abstract

The invention provides a positioning system and method of a tire pressure sensor and a vehicle. The positioning system is applied to the vehicle, the vehicle comprises a plurality of wheels, each wheel is provided with a tire pressure sensor, the positioning system comprises a plurality of positioning devices arranged on the vehicle, and each positioning device is used for receiving a plurality of Bluetooth signals of the tire pressure sensors and obtaining a group of positioning data according to the Bluetooth signals; and the receiving device is used for determining the matching relationship between the tire pressure sensor and the wheel according to the preset positions of the plurality of positioning devices and the plurality of groups of positioning data. The positioning devices are arranged on the vehicle, and each positioning device is used for receiving the Bluetooth signals of the tire pressure sensors and obtaining a group of positioning data according to the Bluetooth signals. Then, the receiving device can determine the matching relation between the tire pressure sensor and the wheel according to the preset positions of the multiple positioning devices and the multiple sets of positioning data so as to position the position of the tire pressure sensor on the vehicle.

Description

Technical Field

[0001] This application belongs to the technical field of automobiles, and particularly relates to a positioning system for a tire pressure sensor, a positioning method, and a vehicle. Background Art

[0002] The wheels of a vehicle are prone to tire blowouts or tire loss due to various factors. Tire blowouts or tire loss of the wheels are likely to cause traffic accidents. To avoid such traffic accidents and affect the driving safety of passers-by, vehicle manufacturers will install a tire pressure monitoring system (TPMS) on the vehicle before it leaves the factory. The tire pressure monitoring system includes a tire pressure sensor and a receiver. The tire pressure sensor can detect the tire pressure and temperature of each wheel of the vehicle for the receiver to display the tire pressure and temperature, and when the tire pressure and / or temperature is abnormal, it will remind the driver of the vehicle.

[0003] Each tire pressure sensor has an identity document (ID) for the receiver to pair the tire pressure sensor with the wheel, so as to distinguish which wheel is installed with which tire pressure sensor. After the wheel is damaged, it needs to be returned to the factory to re-pair the wheel and the tire pressure sensor one by one, which is time-consuming and laborious and increases costs. Summary of the Invention

[0004] In view of this, the embodiments of this application provide a positioning system for a tire pressure sensor, a positioning method, and a vehicle to locate the matching relationship between the tire pressure sensor and the wheel of the vehicle.

[0005] In the first aspect of this application, a positioning system for a tire pressure sensor is provided. The positioning system is applied to a vehicle. The vehicle includes a plurality of wheels, and each wheel is provided with a tire pressure sensor. The positioning system includes: a plurality of positioning modules provided on the vehicle, each positioning device is configured to receive a plurality of Bluetooth signals of a plurality of tire pressure sensors and obtain a set of positioning data according to the plurality of Bluetooth signals; a receiving device, configured to determine the matching relationship between the tire pressure sensor and the wheel according to the preset positions of the plurality of positioning devices and the plurality of sets of positioning data, so as to locate the position of the tire pressure sensor on the vehicle.

[0006] In the above technical solution, a plurality of positioning devices provided on the vehicle, each positioning device is configured to receive a plurality of Bluetooth signals of a plurality of tire pressure sensors and obtain a set of positioning data according to the plurality of Bluetooth signals. Then, the receiving device can determine the matching relationship between the tire pressure sensor and the wheel according to the preset positions of the plurality of positioning devices and the plurality of sets of positioning data, so as to locate the position of the tire pressure sensor on the vehicle.

[0007] In some embodiments of the first aspect, the positioning device further includes a radio frequency modulator and a controller. The radio frequency modulator is configured to convert the frequencies of multiple Bluetooth signals from high frequencies to base frequencies; the positioning controller is configured to parse multiple signal strength indications of the Bluetooth signals with multiple base frequencies; determine multiple calculated distances between the positioning device and the tire pressure sensors corresponding to the multiple strengths according to the multiple strengths of the multiple signal strength indications; determine multiple corresponding relationships between the multiple calculated distances and the multiple identification codes carried by the multiple Bluetooth signals, and obtain a set of positioning data according to the multiple corresponding relationships.

[0008] In some embodiments of the first aspect, the receiving device is further configured to determine a set of matching relationships according to a preset position of a positioning device and a corresponding relationship of a set of positioning data. The matching relationship is the relationship that the identification code corresponding to each calculated distance is located on a wheel; based on multiple positioning devices, count multiple sets of matching relationships; in the statistical result, determine the set of matching relationships with the highest probability as the matching relationship between the tire pressure sensor and the wheel.

[0009] In some embodiments of the first aspect, the receiving device is further configured to send the matching relationship between the tire pressure sensor and the wheel to the display unit of the vehicle.

[0010] In some embodiments of the first aspect, multiple positioning devices are respectively disposed in the structural areas of the vehicle adjacent to different wheels.

[0011] The second aspect of the present application provides a positioning method for a tire pressure sensor, which is applied to a positioning system for a tire pressure sensor. The positioning system includes a positioning device and a receiving device. The positioning method includes: the positioning device receives multiple Bluetooth signals of multiple tire pressure sensors and obtains a set of positioning data according to the multiple Bluetooth signals; the receiving device determines the matching relationship between the tire pressure sensor and the wheel according to the preset positions of the multiple positioning devices and multiple sets of positioning data to locate the position of the tire pressure sensor in the vehicle.

[0012] In some embodiments of the second aspect, the positioning device includes a radio frequency modulator and a positioning controller. The positioning device receives multiple Bluetooth signals of multiple tire pressure sensors and obtains a set of positioning data according to the multiple Bluetooth signals, including: the radio frequency modulator converts the frequencies of the multiple Bluetooth signals from high frequencies to base frequencies; the positioning controller parses multiple signal strength indications of the Bluetooth signals with multiple base frequencies; and determines multiple calculated distances between the positioning device and the tire pressure sensors corresponding to the multiple strengths according to the multiple strengths of the multiple signal strength indications; and determines multiple corresponding relationships between the multiple calculated distances and the multiple identification codes carried by the multiple Bluetooth signals, and obtains a set of positioning data according to the multiple corresponding relationships.

[0013] In some embodiments of the second aspect, the receiving device determines the matching relationship between the tire pressure sensor and the wheel according to the preset positions of multiple positioning devices and multiple sets of positioning data, including: determining a set of matching relationships according to a corresponding relationship between the preset position of one positioning device and a set of positioning data, where the matching relationship is that the identification code corresponding to each calculated distance is located on a wheel; based on multiple positioning devices, counting multiple sets of matching relationships; and in the counting result, determining the set of matching relationships with the highest probability as the matching relationship between the tire pressure sensor and the wheel.

[0014] In some embodiments of the second aspect, the receiving device sends the matching relationship between the tire pressure sensor and the wheel to the display unit of the vehicle.

[0015] The third aspect of the present application provides a vehicle, and the vehicle is equipped with a positioning system of the tire pressure sensor as described above. Description of the Drawings

[0016] Figure 1 It is a schematic diagram of an application scenario of the related art.

[0017] Figure 2 It is a schematic diagram of an application scenario of the positioning system of the tire pressure sensor according to the embodiment of the present application.

[0018] Figure 3 It is a schematic diagram of the structure of a vehicle according to the embodiment of the present application.

[0019] Figure 4 It is a schematic diagram of the structure of the positioning system of the tire pressure sensor according to the embodiment of the present application.

[0020] Figure 5 It is another schematic diagram of an application scenario of the positioning system of the tire pressure sensor according to the embodiment of the present application.

[0021] Figure 6 It is another schematic diagram of the structure of the positioning system of the tire pressure sensor according to the embodiment of the present application.

[0022] Description of the Main Element Symbols

[0023] Vehicle 200

[0024] First wheel 211

[0025] Second wheel 212

[0026] Third wheel 213

[0027] Fourth wheel 214

[0028] Wheel 210

[0029] Tire pressure sensor 221

[0030] Display unit 231

[0031] Positioning system 100

[0032] Positioning device 10

[0033] Receiving device 20

[0034] Power supply units 11, 21

[0035] Antenna 12

[0036] Storage units 13, 24

[0037] RF modulator 14

[0038] Positioning controller 15

[0039] Communication units 16, 22, 25

[0040] Receiving controller 23 Detailed implementation manners

[0041] In the embodiments of the present application, "at least one" means one or more, and "a plurality" means two or more than two. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. In addition, it should be understood that in the description of the present application, terms such as "first" and "second" are only used for the purpose of distinguishing descriptions, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying order.

[0042] The related technologies are described as follows:

[0043] The wheels of a vehicle are liable to have a flat tire or a blown-out tire due to various factors. For example, the weather is too hot, resulting in a blown-out tire. A flat tire or a blown-out tire of a wheel is liable to cause a traffic accident. The levels of traffic accidents are classified into Class A1 (a traffic accident in which a person dies on the spot or within 24 hours after the accident is classified into Class A1), Class A2 (a traffic accident in which a person is injured or dies more than 24 hours after the accident is classified into Class A2), and Class A3 (only property damage). There are 32 cases of Class A1, 529 cases of Class A2, and 1453 cases of Class A3. To avoid such traffic accidents and affect the driving safety of passers-by, before a vehicle leaves the factory, the vehicle manufacturer will install a tire pressure monitoring system (TPMS) on the vehicle. The tire pressure monitoring system includes a tire pressure sensor and a receiver. The tire pressure sensor can detect the tire pressure and temperature of each wheel of the vehicle for the receiver to display the tire pressure and temperature, and when the tire pressure and / or temperature is abnormal, it reminds the driver of the vehicle.

[0044] Each tire pressure sensor has an identity document (ID) for the receiver to pair the tire pressure sensor with the wheel, so as to distinguish which wheel is installed with which tire pressure sensor. As Figure 1 shown, after the wheel is damaged, it needs to be returned to the factory to re-pair the wheel and the tire pressure sensor one by one, which is time-consuming and laborious and increases costs.

[0045] In view of this, the embodiments of the present application provide a positioning system for a tire pressure sensor, a positioning method for a tire pressure sensor, and a vehicle to locate the matching relationship between the tire pressure sensor and the wheel of the vehicle.

[0046] Please refer to Figure 2 , in an application scenario of the tire pressure sensor positioning system of the embodiment of the present application, the vehicle 200 includes a first wheel 211, a second wheel 212, a third wheel 213, and a fourth wheel 214, and each wheel 210 is provided with a tire pressure sensor 221. Three positioning devices 10A, 10B, and 10C of the positioning system 100 are arranged on the vehicle 200. Each positioning device 10 respectively receives the Bluetooth signals sent by the four tire pressure sensors 221 with IDs #1, #2, #3, and #4, and obtains a set of positioning data according to the Bluetooth signals sent by the four tire pressure sensors 221 with IDs #1, #2, #3, and #4. Then, the receiving device 20 determines the matching relationships between the four tire pressure sensors 221 with IDs #1, #2, #3, and #4 and the first wheel 211, the second wheel 212, the third wheel 213, and the fourth wheel 214 respectively according to the preset positions of the positioning devices 10A, 10B, and 10C and each set of positioning data of each positioning device 10, so as to locate that the tire pressure sensor 221 with ID #1 is inside the first wheel 211 of the vehicle 200, the tire pressure sensor 221 with ID #2 is inside the second wheel 212 of the vehicle 200, the tire pressure sensor 221 with ID #3 is inside the third wheel 213 of the vehicle 200, and the tire pressure sensor 221 with ID #4 is inside the fourth wheel 214 of the vehicle 200.

[0047] Please refer to Figures 2 to 4, in some embodiments, the vehicle 200 includes a plurality of wheels 210, and a tire pressure sensor 221 is disposed in each wheel 210. The tire pressure sensor 221 is used to sense the tire pressure information and temperature information of the wheel 210. In one implementation, the vehicle 200 includes four wheels 210. The wheel 210 located under the co-driver's seat is the first wheel 211, and the wheel 210 in the same row as the first wheel 211 is the second wheel 212. The wheel 210 located under the driver's seat is the third wheel 213, and the wheel 210 in the same row as the third wheel 213 is the fourth wheel 214. The identity document (ID) of the tire pressure sensor 221 disposed in the first wheel 211 is #1, the ID of the tire pressure sensor 221 disposed in the second wheel 212 is #2, the ID of the tire pressure sensor 221 disposed in the third wheel 213 is #3, and the ID of the tire pressure sensor 221 disposed in the fourth wheel 214 is #4. The positioning system 100 for the tire pressure sensor provided in the embodiments of the present application is applied to the vehicle 200.

[0048] The positioning system 100 includes a plurality of positioning devices 10 and one or more than two receiving devices 20, and the plurality means three or more than three. A wireless communication is established between the positioning device 10 and the receiving device 20 through Bluetooth communication technology. Each positioning device 10 also establishes a wireless communication with a plurality of tire pressure sensors 221 through Bluetooth communication technology. That is, each positioning device 10 is used to receive Bluetooth signals sent by a plurality of tire pressure sensors 221. In one implementation, after the tire pressure sensor 221 senses a change in the temperature and / or tire pressure information of the tire, it sends a Bluetooth signal to the positioning device 10.

[0049] Each positioning device 10 is used to obtain a set of positioning data according to a plurality of Bluetooth signals. A set of positioning data includes a plurality of corresponding relationships, and each corresponding relationship refers to a relationship between a calculated distance and an ID carried by a Bluetooth signal, where the calculated distance refers to the distance between the tire pressure sensor 221 and the positioning device 10. In an example, a corresponding relationship may be that the ID of the tire pressure sensor 221 with the closest calculated distance to the positioning device 10A is #3. It can be understood that through a plurality of corresponding relationships, the distance situations between a plurality of tire pressure sensors 221 and a positioning device 10 can be arranged.

[0050] Specifically, first, the positioning device 10 is used to parse a plurality of signal strength indicators of a plurality of Bluetooth signals. It can be understood that the strength of the Bluetooth signal is inversely proportional to the distance between the positioning device 10 and the tire pressure sensor 221, and the strength can be represented by a Received Signal Strength Indicator (RSSI).

[0051] A plurality of positioning devices 10 are respectively arranged in the functional areas (or structural areas) of the vehicle 200 adjacent to different wheels 210, so that the intensities converted from the Bluetooth signals sent by the plurality of tire pressure sensors 221 received by each positioning device 10 are inconsistent. The structural areas of the vehicle 200 include the front fender area, the engine hood area, the door area, the body area, the rear fender area, etc. In one example, three positioning devices 10A, 10B, and 10C are provided in the vehicle 200. The positioning device 10A is arranged in the engine hood adjacent to the third wheel 213. The positioning device 10B is arranged in the body cover adjacent to the second wheel 212, and the positioning device 10C is arranged in the rear fender adjacent to the second wheel 212.

[0052] It can be understood that a plurality of positioning devices 10 are respectively arranged in the structural areas adjacent to different wheels 210. The distances between each positioning device 10 and the plurality of tire pressure sensors 221 of the vehicle 200 are different, and the intensities of the Bluetooth signals are also different.

[0053] Then, each positioning device 10 is further configured to determine a plurality of calculated distances between the positioning device 10 and the plurality of tire pressure sensors 221 corresponding to the plurality of intensities indicated by the plurality of signal field strengths, and determine a plurality of corresponding relationships between the plurality of calculated distances and the plurality of identification codes carried by the plurality of Bluetooth signals, and obtain a set of positioning data according to the plurality of corresponding relationships.

[0054] Please refer to Figure 5 , in one example, after the positioning device 10A receives the Bluetooth signals sent by the tire pressure sensors 221 with ID#1, ID#2, ID#3, and ID#4 respectively, the intensity of the tire pressure sensor 221 converted according to the Bluetooth signal is as Figure 5 shown in A. The objects of the intensities from strong to weak are the tire pressure sensor 221 with ID#3, the tire pressure sensor 221 with ID#1, the tire pressure sensor 221 with ID#4, and the tire pressure sensor 221 with ID#2 in sequence. Then, the positioning device 10A calculates a plurality of calculated distances according to the intensity shown in A of Figure 5 . The distance objects of the calculated distances from short to long are the tire pressure sensor 221 with ID#3, the tire pressure sensor 221 with ID#1, the tire pressure sensor 221 with ID#4, and the tire pressure sensor 221 with ID#2 in sequence. Thus, the positioning data (a plurality of corresponding relationships) of the positioning device 10A is that the distance objects of the calculated distances from short to long are the tire pressure sensor 221 with ID#3, the tire pressure sensor 221 with ID#1, the tire pressure sensor 221 with ID#4, and the tire pressure sensor 221 with ID#2 in sequence.

[0055] Similarly, the intensity converted by the positioning device 10B is as Figure 5As shown in B, the objects that cause the intensity from strong to weak are the tire pressure sensors 221 of ID#2, the tire pressure sensors 221 of ID#4, the tire pressure sensors 221 of ID#1, and the tire pressure sensors 221 of ID#3 in sequence. Then, the positioning device 10A calculates multiple calculated distances based on the intensity as shown in Figure 5 B. The distance objects of the calculated distances from short to long are the tire pressure sensors 221 of ID#2, the tire pressure sensors 221 of ID#4, the tire pressure sensors 221 of ID#1, and the tire pressure sensors 221 of ID#3 in sequence. The positioning data of the positioning device 10B is (multiple corresponding relationships), and the distance objects of the calculated distances from short to long are the tire pressure sensors 221 of ID#2, the tire pressure sensors 221 of ID#4, the tire pressure sensors 221 of ID#1, and the tire pressure sensors 221 of ID#3 in sequence.

[0056] The intensity converted by the positioning device 10C is as shown in Figure 5 C. The objects that cause the intensity from strong to weak are the tire pressure sensors 221 of ID#2, the tire pressure sensors 221 of ID#4, the tire pressure sensors 221 of ID#1, and the tire pressure sensors 221 of ID#3 in sequence. Then, the positioning device 10C calculates multiple calculated distances based on the intensity as shown in Figure 5 C. The distance objects of the calculated distances from short to long are the tire pressure sensors 221 of ID#2, the tire pressure sensors 221 of ID#4, the tire pressure sensors 221 of ID#1, and the tire pressure sensors 221 of ID#3 in sequence. In this way, the positioning data (multiple corresponding relationships) of the positioning device 10C is that the distance objects of the calculated distances from short to long are the tire pressure sensors 221 of ID#2, the tire pressure sensors 221 of ID#4, the tire pressure sensors 221 of ID#1, and the tire pressure sensors 221 of ID#3 in sequence.

[0057] It can be understood that after each positioning device 10 receives the Bluetooth signals sent by multiple tire pressure sensors 221, based on the intensity indicated by the signal field strength calculated from the Bluetooth signals, and each Bluetooth signal carries the ID of a tire pressure sensor 221, the lengths of multiple calculated distances between the multiple tire pressure sensors 221 and the positioning device 10 can be determined.

[0058] It can be understood that multiple positioning devices 10 can calculate multiple sets of positioning data based on the Bluetooth signals and send them to the receiving device 20 to assist the receiving device 20 in positioning which wheel 210 of the vehicle 200 the tire pressure sensor 221 is on.

[0059] As shown in Figure 2As shown, the receiving device 20 can be arranged inside the vehicle 200 or integrated into the key of the vehicle 200. The receiving device 20 is configured to determine the matching relationship between the tire pressure sensor 221 and the wheel 210 according to the preset positions of the plurality of positioning devices 10 and the multiple sets of positioning data of the plurality of positioning devices 10. The matching relationship is the relationship that the identification code corresponding to each calculated distance is located on one wheel 210. The receiving device 20 stores the preset positions of each positioning device 10 on the vehicle 200. The preset position refers to the installation position of the positioning device 10, such as inside the engine hood adjacent to the third wheel 213, inside the body cover, and inside the rear fender adjacent to the second wheel 212 as described above.

[0060] Specifically, the receiving device 20 is configured to determine a set of matching relationships according to a corresponding relationship between the preset position of one positioning device 10 and a set of positioning data.

[0061] In one example, in combination with Figure 2 and Figure 5 , the preset position of the positioning device 10A is inside the engine hood adjacent to the third wheel 213. A corresponding relationship of the positioning data of the positioning device 10A indicates that the tire pressure sensor 221 with ID#3 is the closest to the positioning device 10A in terms of calculated distance. Then, it can be determined that the tire pressure sensor 221 with ID#3 may be arranged inside the third wheel 213 (the tire pressure sensor 221 with ID#3 being arranged inside the third wheel 213 is a set of matching relationships). A corresponding relationship indicates that the tire pressure sensor 221 with ID#1 is the second farthest from the positioning device 10A in terms of calculated distance. Then, it can be determined that the tire pressure sensor 221 with ID#1 may be arranged inside the first wheel 211 (the tire pressure sensor 221 with ID#1 being arranged inside the first wheel 211 is a set of matching relationships). A corresponding relationship indicates that the tire pressure sensor 221 with ID#4 is the third farthest from the positioning device 10A in terms of calculated distance. Then, it can be determined that the tire pressure sensor 221 with ID#4 may be arranged inside the fourth wheel 214 (determining that the tire pressure sensor 221 with ID#4 is arranged inside the fourth wheel 214 is a set of matching relationships). A corresponding relationship indicates that the tire pressure sensor 221 with ID#2 is the farthest from the positioning device 10A in terms of calculated distance. Then, it is determined that the tire pressure sensor 221 with ID#2 may be arranged inside the second wheel 212 (determining that the tire pressure sensor 221 with ID#2 is arranged inside the second wheel 212 is a set of matching relationships).

[0062] Similarly, the positioning device 10B is disposed in the body cover adjacent to the second wheel 212. A corresponding relationship of the positioning data of the positioning device 10B indicates that the tire pressure sensor 221 with ID#2 has the closest calculated distance to the positioning device 10B. Then, it can be determined that the tire pressure sensor 221 with ID#2 may be disposed in the second wheel 212. A corresponding relationship indicates that the tire pressure sensor 221 with ID#4 has the second farthest calculated distance to the positioning device 10B. Then, it can be determined that the tire pressure sensor 221 with ID#4 may be disposed in the fourth wheel 214. A corresponding relationship indicates that the tire pressure sensor 221 with ID#1 has the third farthest calculated distance to the positioning device 10B. Then, it can be determined that the tire pressure sensor 221 with ID#1 may be disposed in the first wheel 211. A corresponding relationship indicates that the tire pressure sensor 221 with ID#3 has the farthest calculated distance to the positioning device 10B. Then, it is determined that the tire pressure sensor 221 with ID#3 may be disposed in the third wheel 213. Among them, each group of matching relationships refers to the content of the previous paragraph.

[0063] The positioning device 10C is disposed in the rear fender adjacent to the second wheel 212. A corresponding relationship of the positioning data of the positioning device 10C indicates that the tire pressure sensor 221 with ID#2 has the closest calculated distance to the positioning device 10C. Then, it can be determined that the tire pressure sensor 221 with ID#2 may be disposed in the second wheel 212. A corresponding relationship indicates that the tire pressure sensor 221 with ID#4 has the second farthest calculated distance to the positioning device 10C. Then, it can be determined that the tire pressure sensor 221 with ID#4 may be disposed in the fourth wheel 214. A corresponding relationship indicates that the tire pressure sensor 221 with ID#1 has the third farthest calculated distance to the positioning device 10C. Then, it can be determined that the tire pressure sensor 221 with ID#1 may be disposed in the first wheel 211. A corresponding relationship indicates that the tire pressure sensor 221 with ID#3 has the farthest calculated distance to the positioning device 10C. Then, it is determined that the tire pressure sensor 221 with ID#3 may be disposed in the third wheel 213. Among them, each group of matching relationships refers to the content of the paragraph before the previous paragraph.

[0064] It can be understood that each set of positioning data can indicate the calculated distance situation between each positioning device 10 and multiple tire pressure sensors 221. Combining with the installation position of the positioning device 10 itself, the receiving device 20 can determine a set of matching relationships of which tire pressure sensor 221 is located on which wheel 210.

[0065] Next, the receiving device 20 is further configured to count multiple sets of matching relationships obtained according to multiple positioning devices 10 based on the multiple positioning devices 10. In the statistical result, the set of matching relationships with the highest probability is determined as the matching relationship between the tire pressure sensor 221 and the wheel 210.

[0066] For example, the probability of the matching relationship (the matching relationship refers to which tire pressure sensor 221 is located on which wheel 210) of each group calculated by the statistical positioning devices 10A, 10B, and 10C is statistically determined. In the statistical result, the matching relationship with the highest probability is determined as the final matching relationship. Since in the statistical result, the probability that the tire pressure sensor 221 of D#1 is set in the first wheel 211 is 100%, the probability that the tire pressure sensor 221 of D#2 is set in the second wheel 212 is 100%, the probability that the tire pressure sensor 221 of D#3 is set in the third wheel 213 is 100%, and the probability that the tire pressure sensor 221 of D#4 is set in the fourth wheel 214 is 100%. It can be finally determined that the tire pressure sensor 221 of D#1 is set in the first wheel 211, the tire pressure sensor 221 of D#2 is set in the second wheel 212, the tire pressure sensor 221 of D#3 is set in the third wheel 213, and the tire pressure sensor 221 of D#4 is set in the fourth wheel 214.

[0067] It can be understood that if only one positioning device 10 is used, since the Bluetooth signal emitted by the tire pressure sensor 221 is likely to generate errors due to interference factors. Therefore, it is very likely that the intensities of the Bluetooth signals emitted by multiple tire pressure sensors 221 received by the positioning device 10 are the same. The positioning device 10 cannot locate which tire pressure sensor 221 is on which wheel 210. In the embodiment of the present application, multiple positioning devices 10 are used as multiple Bluetooth anchors (Bluetooth Low Energy Anchor, BLE Anchor) to generate multiple groups of positioning data. The receiving device 20 can further improve the accuracy of the matching relationship between multiple tire pressure sensors 221 and multiple wheels 210 through cross-verification of multiple groups of positioning data.

[0068] In the above technical solution, multiple positioning devices 10 provided on the vehicle 200, each of the positioning devices 10 is configured to receive multiple Bluetooth signals of multiple tire pressure sensors 221, and obtain a group of positioning data according to the multiple Bluetooth signals. Then, the receiving device 20 can determine the matching relationship between the tire pressure sensor 221 and the wheel 210 according to the preset positions of the multiple positioning devices 10 and multiple groups of positioning data to locate the position of the tire pressure sensor 221 on the vehicle 200.

[0069] In some embodiments, please refer to Figure 6, the positioning device 10 includes a power supply unit 11, an antenna 12, a storage unit 13, a radio frequency modulator 14, a positioning controller 15, and a communication unit 16. The power supply unit 11 is electrically connected to the antenna 12, the radio frequency modulator 14, the positioning controller 15, and the communication unit 16 respectively, and is used to provide power for the antenna 12, the radio frequency modulator 14, the positioning controller 15, and the communication unit 16. The antenna 12 is electrically connected to the radio frequency modulator 14. The antenna 12 is used to receive the Bluetooth signal sent from the tire pressure sensor 221 and send the Bluetooth signal to the radio frequency modulator 14. The radio frequency modulator 14 is electrically connected to the positioning controller 15. The radio frequency modulator 14 is used to convert the frequencies of multiple Bluetooth signals from high frequencies to base frequencies, so as to convert the high-frequency Bluetooth signals that are beneficial for propagation into base-frequency Bluetooth signals that are beneficial for the positioning controller 15 to process.

[0070] The positioning controller 15 is used to parse out multiple signal strength indicators of multiple base-frequency Bluetooth signals, and determine multiple calculated distances between the positioning device 10 and the tire pressure sensors 221 corresponding to the multiple strengths according to the multiple strengths of the multiple signal strength indicators. The positioning controller 15 is further used to determine multiple corresponding relationships between the multiple calculated distances and multiple identification codes carried by the multiple Bluetooth signals, and obtain a set of positioning data according to the multiple corresponding relationships. The positioning controller 15 can be a chip MCU (Microcontroller Unit, MCU). The positioning controller 15 is also electrically connected to the communication unit 16, and the communication unit 16 is used to send the positioning data to the receiving device 20. The storage unit 13 is electrically connected to the positioning controller 15, and the storage unit 13 is used to store programs or data, so that the positioning controller 15 can realize the functions of the positioning controller 15 by running or executing the programs stored in the storage unit 13 and calling the data stored in the storage unit 13.

[0071] In some embodiments, the receiving device 20 includes a power supply unit 21, a communication unit 22, a receiving controller 23, a storage unit 24, and a communication unit 25. The power supply unit 21 is electrically connected to the communication unit 22, the receiving controller 23, and the storage unit 24 respectively. The power supply unit 21 is used to provide power for the communication units 22 and 25, the receiving controller 23, and the storage unit 24. The communication unit 22 is electrically connected to the receiving controller 23. The communication unit 22 is used to receive the positioning data sent by the communication unit 16 of the positioning device 10 and send the positioning data to the receiving controller 23. The receiving controller 23 is used to determine a set of matching relationships according to a correspondence between a preset position of one positioning device 10 and a set of positioning data. The receiving controller 23 is also used to count multiple sets of matching relationships based on multiple positioning devices 10. The receiving controller 23 is further used to determine, in the statistical result, the set of matching relationships with the highest probability as the matching relationship between the tire pressure sensor 221 and the wheel 210. The receiving controller 23 is also electrically connected to the communication unit 25. The communication unit 25 is used to send the matching relationship between the tire pressure sensor 221 and the wheel 210 to the display unit 231 of the vehicle 200. So that the display unit 231 of the vehicle 200 can display the positioning information of which tire pressure sensor 221 is located on which wheel 210. It can be understood that the Bluetooth signal also carries the temperature information and tire pressure information of the wheel 210 sent by the tire pressure sensor 221. That is, the positioning data also includes temperature information and tire pressure information. After the receiving device 20 locates the position of the tire pressure sensor 221 in the vehicle 200, it can also send the temperature information and tire pressure information to the display unit 231 together.

[0072] The storage unit 24 is electrically connected to the receiving controller 23. The storage unit 24 is used to store programs or data, so that the receiving controller 23 can realize the functions of the receiving controller 23 by running or executing the programs stored in the storage unit 24 and calling the data stored in the storage unit 24.

[0073] This application also provides a positioning method for a tire pressure sensor, which is applied to a positioning system 100 of the tire pressure sensor. The positioning system 100 includes a positioning device 10 and a receiving device 20. The positioning method includes the following steps:

[0074] Step S101: The positioning device receives multiple Bluetooth signals of multiple tire pressure sensors and obtains a set of positioning data according to the multiple Bluetooth signals.

[0075] Step S102: The receiving device determines the matching relationship between the tire pressure sensor and the wheel according to the preset positions of multiple positioning devices and multiple sets of positioning data to locate the position of the tire pressure sensor in the vehicle.

[0076] In some embodiments, the positioning device 10 includes a radio frequency modulator 14 and a positioning controller 15. The positioning device 10 receives multiple Bluetooth signals from multiple tire pressure sensors and obtains a set of positioning data based on the multiple Bluetooth signals, including the following steps:

[0077] Step S201: The radio frequency modulator converts the frequencies of the multiple Bluetooth signals from high frequencies to base frequencies;

[0078] Step S202: The positioning controller analyzes multiple signal strength indicators of the Bluetooth signals with multiple base frequencies; and

[0079] Step S203: Determine multiple calculated distances between the positioning device and the tire pressure sensors corresponding to the multiple strengths according to the multiple strengths of the multiple signal strength indicators; and

[0080] Step S204: Determine multiple corresponding relationships between the multiple calculated distances and the multiple identification codes carried by the multiple Bluetooth signals, and obtain a set of positioning data according to the multiple corresponding relationships.

[0081] In some embodiments, the receiving device determines the matching relationship between the tire pressure sensor and the wheel according to the preset positions of multiple positioning devices and multiple sets of positioning data, including the following steps:

[0082] Step S301: Determine a set of matching relationships according to the preset position of a positioning device and a corresponding relationship of a set of positioning data;

[0083] Step S302: Based on multiple positioning devices, count multiple sets of matching relationships;

[0084] Step S303: Among the statistical results, determine the set of matching relationships with the highest probability as the matching relationship between the tire pressure sensor and the wheel.

[0085] In some embodiments, the receiving device sends the matching relationship between the tire pressure sensor and the wheel to the display unit of the vehicle.

[0086] This application also provides a vehicle 200, which is equipped with a positioning system 100 for tire pressure sensors.

[0087] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered to exceed the scope of this application. Those skilled in the art can clearly understand that for the convenience and conciseness of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and not to limit them. Although this application has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of this application can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of this application.

Claims

1. A positioning system for a tire pressure sensor, the positioning system being applied to a vehicle, the vehicle including a plurality of wheels, characterized in that, Each of the wheels is provided with a tire pressure sensor, and the positioning system includes: A plurality of positioning modules disposed on the vehicle, each of the positioning devices being configured to receive a plurality of Bluetooth signals from the plurality of tire pressure sensors and obtain a set of positioning data based on the plurality of Bluetooth signals; A receiving device configured to determine a matching relationship between the tire pressure sensor and the wheel based on a preset position of the plurality of positioning devices and multiple sets of the positioning data, so as to locate the position of the tire pressure sensor on the vehicle.

2. The positioning system of the tire pressure sensor according to claim 1, wherein The positioning device further includes a radio frequency modulator and a controller; The radio frequency modulator is configured to convert the frequency of the plurality of Bluetooth signals from a high frequency to a base frequency; The positioning controller is configured to parse out a plurality of signal strength indications of the Bluetooth signals of the plurality of base frequencies; Determine a plurality of calculated distances between the positioning device and the tire pressure sensors corresponding to the plurality of intensities based on the plurality of intensities of the plurality of signal strength indications; Determine a plurality of corresponding relationships between the plurality of calculated distances and the plurality of identification codes carried by the plurality of Bluetooth signals, and obtain a set of the positioning data based on the plurality of corresponding relationships.

3. The positioning system of the tire pressure sensor according to claim 2, wherein, The receiving device is further configured to, Determine a set of matching relationships based on the preset position of one of the positioning devices and one of the corresponding relationships of a set of the positioning data, the matching relationship being that the identification code corresponding to each of the calculated distances is located on a wheel; Based on the plurality of positioning devices, count multiple sets of the matching relationships; Among the statistical results, determine the set of matching relationships with the highest probability as the matching relationship between the tire pressure sensor and the wheel.

4. The positioning system of the tire pressure sensor according to claim 1, characterized in that, The receiving device is further configured to send the matching relationship between the tire pressure sensor and the wheel to a display unit of the vehicle.

5. The positioning system of the tire pressure sensor according to claim 1, wherein The plurality of positioning devices are respectively disposed in structural areas of the vehicle adjacent to different wheels.

6. A positioning method for a tire pressure sensor, applied to a positioning system of the tire pressure sensor, characterized in that The positioning system includes a positioning device and a receiving device, and the positioning method includes: The positioning device receives a plurality of Bluetooth signals from the plurality of tire pressure sensors and obtains a set of positioning data based on the plurality of Bluetooth signals; The receiving device determines a matching relationship between the tire pressure sensor and the wheel based on a preset position of the plurality of positioning devices and multiple sets of the positioning data, so as to locate the position of the tire pressure sensor on the vehicle.

7. The positioning method according to claim 6, wherein The positioning device includes a radio frequency modulator and a positioning controller. The positioning device receiving a plurality of Bluetooth signals from the plurality of tire pressure sensors and obtaining a set of positioning data includes: The radio frequency modulator converts the frequency of the plurality of Bluetooth signals from a high frequency to a base frequency; The positioning controller parses out a plurality of signal strength indications of the Bluetooth signals of the plurality of base frequencies; and Determine a plurality of calculated distances between the positioning device and the tire pressure sensors corresponding to the plurality of intensities based on the plurality of intensities of the plurality of signal strength indications; and Determine a plurality of corresponding relationships between the plurality of calculated distances and the plurality of identification codes carried by the plurality of Bluetooth signals, and obtain a set of the positioning data based on the plurality of corresponding relationships.

8. The positioning method according to claim 7, wherein The receiving device determines the matching relationship between the tire pressure sensor and the wheel according to the preset positions of the plurality of positioning devices and multiple sets of the positioning data, including: Determining a set of matching relationships according to the preset position of one of the positioning devices and one of the corresponding relationships of one set of the positioning data, where the matching relationship is that the identification code corresponding to each calculated distance is located on one of the wheels; Based on the plurality of positioning devices, statistically analyzing multiple sets of the matching relationships; Among the statistical results, determining the set of matching relationships with the highest probability as the matching relationship between the tire pressure sensor and the wheel.

9. The positioning method according to claim 6, characterized in that The receiving device sends the matching relationship between the tire pressure sensor and the wheel to the display unit of the vehicle.

10. A vehicle, characterized in that, The vehicle is equipped with the positioning system of the tire pressure sensor according to any one of claims 1 to 5.

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