Wireless Tire Pressure Sensor Positioning Method and System for Motor Vehicles

Abstract

A method for positioning wireless tire pressure sensors of a motor vehicle is to install wireless tire pressure sensors on the tires of the motor vehicle respectively, and a wireless receiving device is arranged near one of the tires. The wireless receiving device gives different numbers and the positioning positions of which tire of the motor vehicle the wireless tire pressure sensors are located according to the strength of the wireless signals transmitted by the wireless tire pressure sensors received by it. Then, it is required that the wireless tire pressure sensors with each number respectively read the wireless signal strength of the wireless tire pressure sensors with other numbers, and establish the relationship of the wireless signal strength between any two paired wireless tire pressure sensors to verify whether the positioning position is correct. The present invention can perform the positioning of each wireless tire pressure sensor after all the wireless tire pressure sensors of the motor vehicle are installed, saving the operation and time for each individual wireless tire pressure sensor to input its position to the wireless receiving device.

Description

Technical Field

[0001] The invention relates to a sensor positioning method, and in particular to a wireless tire pressure sensor positioning method which is to install the wireless tire pressure sensor on a tire of a motor vehicle and then position the sensor. Background Art

[0002] The existing wireless tire pressure sensors installed on the tires of motor vehicles need to be paired with the wireless tire pressure receiver before use. After the wireless tire pressure receiver inputs the tire position to be installed, it is actually installed on the predetermined tire. In this way, the wireless tire pressure receiver can recognize the tire where the individual wireless tire pressure sensors are located during operation, and can issue a warning of insufficient tire pressure at the correct tire position when sensing the tire pressure and issuing an alarm.

[0003] The aforementioned method of pairing and setting the tire position in the wireless tire pressure receiver before installation can achieve the effect of confirming the installation position of individual wireless tire pressure sensors. However, since the wireless tire pressure sensors are installed separately in front of the motor vehicle, the required wireless tire pressure sensors need to be paired and input with the wireless receiving device one by one, which requires a long setup time. Summary of the invention

[0004] Since the existing wireless tire pressure sensors installed on the tires of motor vehicles need to be paired with the wireless tire pressure receiver before use, it is troublesome and time-consuming to set up and use. Therefore, the present invention uses a method of receiving the transmission signal of each wireless tire pressure sensor through a wireless receiving device to determine the position of all wireless tire pressure sensors installed on the motor vehicle.

[0005] To achieve the above object, the present invention provides a method for positioning a wireless tire pressure sensor of a motor vehicle, the steps of which include:

[0006] A wireless tire pressure sensor is installed on each tire of a motor vehicle, and a wireless receiving device is arranged near one of the tires of the motor vehicle, so that any two pairs of wireless tire pressure sensors can communicate with each other;

[0007] Each wireless tire pressure sensor transmits a wireless signal to the wireless receiving device, and the wireless receiving device gives different numbers or marks and the positioning position of which tire of the motor vehicle is located according to the strength of the wireless signal transmitted to it by each wireless tire pressure sensor;

[0008] Each numbered or marked wireless tire pressure sensor reads the wireless signal strength of other numbered or marked wireless tire pressure sensors respectively, establishes a wireless signal strength relationship between any two pairs of wireless tire pressure sensors, and verifies whether the positioning position of each wireless tire pressure sensor is correct based on this wireless signal strength relationship.

[0009] Preferably, the wireless receiving device of the present invention searches for various wireless tire pressure sensors around it, identifies the identities of the various wireless tire pressure sensors, and causes the various wireless tire pressure sensors to transmit wireless signals to it; the wireless receiving device sequentially requests the wireless tire pressure sensors with various numbers or labels to act, and causes the wireless tire pressure sensors with various numbers or labels to respectively read the wireless signal strengths of the wireless tire pressure sensors with other numbers or labels.

[0010] Preferably, when the motor vehicle starts, the gravity sensors of the various wireless tire pressure sensors detect the movement, causing the various wireless tire pressure sensors to transmit wireless signals to the wireless receiving device according to the settings of the internal program, and respectively read the wireless signal strengths of the wireless tire pressure sensors with other numbers or labels according to the settings of the internal program.

[0011] Furthermore, after the wireless receiving device of the present invention searches for the various wireless tire pressure sensors around it and identifies the identities of the various wireless tire pressure sensors, one byte of the unique identifier of each wireless tire pressure sensor is locked, and the wireless receiving device only communicates with the wireless tire pressure sensors having the same byte in the unique identifier thereafter.

[0012] Furthermore, the various wireless tire pressure sensors with various numbers or labels transmit wireless signals to the wireless receiving device in a manner of at least varying multiple power levels, and multiple packets are sent at each power level; the wireless receiving device infers the distance between the wireless receiving device and the various wireless tire pressure sensors based on the trend of the packet arrival rates of the various wireless tire pressure sensors at each power level, where the greater the trend of the packet arrival rate indicates the closer the distance, and verifies again whether the positioning positions of the various wireless tire pressure sensors are correct.

[0013] To achieve the above object, the present invention also provides a method for positioning a wireless tire pressure sensor of a motor vehicle, and its steps include:

[0014] A wireless tire pressure sensor is respectively installed on each tire of a motor vehicle, and a wireless receiving device is arranged at a position relatively close to one of the tires of the motor vehicle;

[0015] The various wireless tire pressure sensors transmit wireless signals to the wireless receiving device, and the wireless receiving device gives different numbers or labels according to the strengths of the wireless signals transmitted by the various wireless tire pressure sensors to it;

[0016] The wireless tire pressure sensors with each number transmit wireless signals to the wireless receiving device in a manner of changing at least multiple power levels, and send multiple packets at each power level. The wireless receiving device determines the distance between the wireless receiving device and the wireless tire pressure sensors with each number based on the trend of the packet arrival rate of the wireless tire pressure sensors with each number or label at each power level. The greater the trend of the packet arrival rate, the closer the distance. Then it locates the positions of the wireless tire pressure sensors on the tires of the motor vehicle.

[0017] Preferably, the wireless receiving device of the present invention searches for the surrounding wireless tire pressure sensors, identifies the identities of the wireless tire pressure sensors, and enables the wireless tire pressure sensors to transmit wireless signals to it; the wireless receiving device requests the wireless tire pressure sensors with each number or label to transmit wireless signals to it in a manner of changing at least multiple power levels.

[0018] Preferably, when the motor vehicle starts moving, the gravity sensors of the wireless tire pressure sensors detect the movement, causing the wireless tire pressure sensors to transmit wireless signals to the wireless receiving device according to the settings of the internal program, and transmit wireless signals to the wireless receiving device in a manner of changing at least multiple power levels according to the settings of the internal program.

[0019] To achieve the above object, the present invention provides a wireless tire pressure sensor positioning system for a motor vehicle, including:

[0020] A motor vehicle, including at least two or more tires, with a wireless tire pressure sensor installed on each tire respectively, and a wireless receiving device is provided at a position of the motor vehicle relatively close to one of the tires. Any two wireless tire pressure sensors paired with each other can communicate with each other;

[0021] Each wireless tire pressure sensor transmits a wireless signal to the wireless receiving device, and the wireless receiving device gives different numbers or labels and the positioning position on which tire of the motor vehicle according to the strength of the wireless signal transmitted by each wireless tire pressure sensor to it.

[0022] Further, each wireless tire pressure sensor with each number or label of the present invention respectively reads the wireless signal strength of other wireless tire pressure sensors with each number or label, establishes the wireless signal strength relationship between any two paired wireless tire pressure sensors, and verifies whether the positioning positions of the wireless tire pressure sensors are correct based on this wireless signal strength relationship.

[0023] To achieve the above object, the present invention provides a wireless tire pressure sensor positioning system for a motor vehicle, including:

[0024] A motor vehicle, including at least two or more tires, with a wireless tire pressure sensor installed on each tire respectively, and a wireless receiving device is provided at a position of the motor vehicle relatively close to one of the tires;

[0025] Each wireless tire pressure sensor transmits a wireless signal to the wireless receiving device, and the wireless receiving device assigns different numbers or labels according to the strength of the wireless signals transmitted by each wireless tire pressure sensor to it;

[0026] Each wireless tire pressure sensor with a number or label transmits a wireless signal to the wireless receiving device in a manner of at least varying multiple power levels, and sends multiple packets at each power level. The wireless receiving device uses the trend of the packet arrival rate of each wireless tire pressure sensor with a number or label at each power level. When the trend of the packet arrival rate is greater, it indicates a closer distance, and calculates the distance between the wireless receiving device and each wireless tire pressure sensor with a number or label, and locates the position of each wireless tire pressure sensor on the tire of the motor vehicle.

[0027] Through the foregoing positioning method and the system applied to a motor vehicle, the present invention can, after all wireless tire pressure sensors are respectively installed on the tires of the motor vehicle, search for the communication of each wireless tire pressure sensor around by the wireless receiving device to confirm which tire position each wireless tire pressure sensor is installed on. In this way, when setting up wireless tire pressure sensors on a motor vehicle, it is not necessary to input the tire position where each wireless tire pressure sensor is to be installed into the wireless receiving device before each installation, which can save the operation and time of inputting the position into the wireless receiving device before the installation of each individual wireless tire pressure sensor. In addition, it can also avoid the alarm error problem caused by the human error of installing the wireless tire pressure sensor at the wrong position after individually inputting the tire position into the wireless receiving device in the existing method. Description of the Drawings

[0028] Figure 1 It is a schematic diagram of the setting of a wireless tire pressure sensor and a receiver according to the first preferred embodiment of the present invention.

[0029] Figure 2 It is a schematic diagram of the wireless signal reception strength according to the first preferred embodiment of the present invention.

[0030] Figure 3 It is a schematic diagram of the setting position of another wireless tire pressure sensor according to the first preferred embodiment of the present invention.

[0031] Figure 4 It is a schematic diagram of the setting position of yet another wireless tire pressure sensor according to the first preferred embodiment of the present invention.

[0032] Figure 5 It is a schematic diagram of the setting of a wireless tire pressure sensor and a receiver according to the second preferred embodiment of the present invention.

[0033] Figure 6 It is a schematic diagram of the setting of a wireless tire pressure sensor and a receiver according to the third preferred embodiment of the present invention.

[0034] Figure 7 It is a schematic diagram of the setting of the wireless tire pressure sensor and the receiver in the fourth preferred embodiment of the present invention.

[0035] Symbol description:

[0036] 10 Automobile 10A Motorcycle

[0037] 11 Tire 20 Wireless tire pressure sensor

[0038] 30 Wireless receiving device Specific implementation manner

[0039] In order to understand in detail the technical features and practical effects of the present invention and to implement it in accordance with the content of the specification, the preferred embodiments shown in the drawings are further described in detail as follows.

[0040] Please refer to Figure 1 、 Figure 2 In the first preferred embodiment shown, the present invention provides a method for positioning a wireless tire pressure sensor of a motor vehicle. Four wireless tire pressure sensors 20 are respectively installed on the four tires 11 of the right front wheel, left front wheel, right rear wheel and left rear wheel of the automobile 10, and thus are applied to the automobile 10 with four tires 11 to form a positioning system. In this preferred embodiment, the unique identifiers for each wireless tire pressure sensor 20 to identify its identity in wireless communication transmission, that is, the media access control addresses (MAC) are 0E:03:A7:D9:F4:05, 0E:3C:77:AA:BF:42, 0E:F8:AE:90:48:73, 0E:09:BA:49:48:35 respectively; in cooperation with the four wireless tire pressure sensors 20, a wireless receiving device 30 is set at a position closer to one of the tires 11 where a wireless tire pressure sensor 20 is installed. In this preferred embodiment, it is a position closer to the tire 11 of the right front wheel; each of the aforementioned wireless tire pressure sensors 20 is a Bluetooth tire pressure sensor with data interaction and communication functions. Any two pairs of wireless tire pressure sensors 20, that is, when each wireless tire pressure sensor 20 is paired with the other three wireless tire pressure sensors 20 respectively in pairs, they can communicate with each other. The aforementioned wireless receiving device 30 is a Bluetooth tire pressure receiver with data interaction and communication functions. The Bluetooth tire pressure receiver can be a tire pressure detector host with a display, or a smart phone, tablet, in-vehicle audio-visual entertainment system with Bluetooth function or a wearable device, such as a smart watch; the positioning method for determining which tire 11 of the automobile 10 each wireless tire pressure sensor 20 is located on includes:

[0041] After four wireless tire pressure sensors 20 are respectively installed on corresponding tires 11, the wireless receiving device 30 is activated to start searching for signals of each wireless tire pressure sensor 20 around it. After identifying the identities of each wireless tire pressure sensor 20, to further avoid interference from other external wireless devices during subsequent wireless communication with each wireless tire pressure sensor 20, optionally, the wireless receiving device 30 can arbitrarily lock one byte out of the six bytes (Byte) of the unique identifier of each wireless tire pressure sensor 20. In this preferred embodiment, it locks the first byte "0E" of each unique identifier. After that, the wireless receiving device 30 only communicates with the wireless tire pressure sensor 20 having the same byte at the same position of the unique identifier.

[0042] After the wireless receiving device 30 searches for each wireless tire pressure sensor 20 around it, it records the signals transmitted by each wireless tire pressure sensor 20 to it, analyzes them, and assigns different numbers (the different numbers described below can also be replaced with different marks, as long as they can be used as marks for identifying and distinguishing individuals, but in subsequent embodiments, different numbers are used as examples for illustration) and the positioning positions of which tire 11 of the vehicle 10 they are located at; in some preferred embodiments with lower precision requirements, this positioning position can be used as the actual position of each numbered wireless tire pressure sensor 20 in which tire 11 as the positioning result without further verification and comparison described below. This method / system can be applied to motor vehicles with more than two tires 11, such as motorcycles; when the precision requirement for the positioning result is higher, further verification of the positioning position is required.

[0043] In this preferred embodiment, the number of the wireless receiving device 30 is number 0. The wireless tire pressure sensor 20 of the right front wheel is the closest to the wireless receiving device 30 and has the strongest received wireless signal strength. The wireless tire pressure sensor 20 of the right front wheel is assigned the number 1. Then, in decreasing order of the wireless signal strength received by the wireless receiving device 30, the remaining wireless tire pressure sensors 20 are respectively assigned the numbers 2, 3, and 4. According to the judgment that the stronger the wireless signal strength, the closer it is to the wireless receiving device 30, it is preset that the wireless tire pressure sensors 20 numbered 2, 3, and 4 are respectively located at the positioning positions of the left front wheel, right rear wheel, and left rear wheel of the vehicle 10. The wireless signal strengths received by the wireless receiving device 30 from each wireless tire pressure sensor 20 are shown in the following Table 1 (the arrangement of the wireless signal strength RSSI 01 to RSSI 04 is from largest to smallest):

[0044] Number 1 Number 2 Number 3 Number 4 Number 0 <![CDATA[RSSI 01 > <![CDATA[RSSI 02 > <![CDATA[RSSI 03 > <![CDATA[RSSI 04 >

[0045] Table 1. Wireless signal strength table received by the wireless receiving device

[0046] Next, the wireless receiving device 30 sequentially requests the wireless tire pressure sensors 20 with each number to act, so that each wireless tire pressure sensor 20 with a certain number reads the wireless signal strength of the wireless tire pressure sensors 20 with other numbers. Then, each wireless tire pressure sensor 20 transmits the read wireless signal strength to the wireless receiving device 30, and establishes the wireless signal strength relationship between any two paired wireless tire pressure sensors 20 with each number as shown in Table 2 below:

[0047]

[0048] Table 2. Wireless signal strength table read by each numbered device from each other

[0049] Verify whether the positioning positions of the wireless tire pressure sensors 20 are correct according to the wireless signal strength relationship revealed in Table 2. For example, taking the wireless tire pressure sensor 20 numbered 2 at the left front wheel as the reference for the positioning position, the wireless signal strength RSSI read by the wireless tire pressure sensor 20 numbered 2 21 should conform to the following formula: RSSI 21 ≈RSSI 34 ≈RSSI 43 , that is, the wireless signal strength between the wireless tire pressure sensors 20 numbered 2 and 1 is approximately equal to the wireless signal strength between the wireless tire pressure sensors 20 numbered 3 and 4, which means that it is confirmed that the wireless tire pressure sensors numbered 2 and 1 are located at the two front wheels, and the wireless tire pressure sensors numbered 3 and 4 are located at the two rear wheels.

[0050] The wireless signal strength RSSI read by the wireless tire pressure sensor 20 numbered 2 21 also conforms to the following formula: RSSI 21 >RSSI 24 >RSSI 23 , that is, compare the wireless signal strength between the wireless tire pressure sensors numbered 2, 3 and those numbered 2, 4, and confirm which one of the wireless tire pressure sensors 20 numbered 3 and 4 is on the same side of the vehicle 10 as the wireless tire pressure sensor 20 numbered 2 (in this preferred embodiment, the wireless tire pressure sensor 20 numbered 4 is on the same side of the vehicle 10 as the wireless tire pressure sensor 20 numbered 2). Being on the same side means that the distance is shorter and the wireless signal strength is greater. (When comparing with the wireless tire pressure sensor 20 numbered 1 at the right front wheel as the reference for the positioning position, it conforms to the following formula: RSSI 12 >RSSI 13 >RSSI 14, compare the wireless signal strengths between the wireless tire pressure sensors 20 numbered 1 and 3 and those numbered 1 and 4, and confirm that the distance between the wireless tire pressure sensor 20 numbered 3 and the wireless tire pressure sensor 20 numbered 1 is relatively close, so the wireless signal strength is greater); if both of the above two formulas are met, it can be confirmed that the positioning positions of the foregoing wireless tire pressure sensors 20 are correct.

[0051] Please refer to Figure 2 As shown, when the positioning positions of the wireless tire pressure sensors 20 of the foregoing numbers are correct, the wireless signal strengths compared by looking up the table in Table 2 will meet the following formula: RSSI 12 / 21 ≈RSSI 34 / 43 >RSSI 13 / 31 ≈RSS 24 / 42 >RSSI 14 / 41 ≈RSSI 23 / 32 . Therefore, in addition to the foregoing first preferred embodiment starting the comparison with number 2 as the reference, for any number as the reference for the comparison, as long as the results of the wireless signal strengths meet the foregoing formula, it can be confirmed that the positioning positions of the foregoing wireless tire pressure sensors 20 are correct; the foregoing means for verifying the correct positioning position is applicable not only to the vehicle 10 with four wireless tire pressure sensors 20 respectively installed on four tires 11, but also to verify tricycles or various motor vehicles with four or more tires 11.

[0052] In addition to the foregoing first preferred embodiment of the present invention, the wireless receiving device 30 searches for the surrounding wireless tire pressure sensors 20 to assign numbers and positioning positions to the wireless tire pressure sensors 20, and then the wireless receiving device 30 sequentially requests the wireless tire pressure sensors 20 of each number to respectively read the wireless signal strengths of the wireless tire pressure sensors 20 of other numbers. Then, the wireless tire pressure sensors 20 of each number transmit the read wireless signal strengths to the wireless receiving device 30 for subsequent comparison to confirm the correct positioning position. In other preferred embodiments, the wireless receiving device 30 may not be used as the initiating component for positioning, but rather it is set that when the vehicle 10 starts, the gravity sensors of the wireless tire pressure sensors 20 detect the movement, causing the wireless tire pressure sensors 20 to transmit wireless signals to the wireless receiving device 30 according to the settings of the internal program, and the wireless tire pressure sensors 20 respectively read the wireless signal strengths of the wireless tire pressure sensors 20 of other numbers according to the settings of the internal program. Then, the wireless tire pressure sensors 20 of each number transmit the read wireless signal strengths to the wireless receiving device 30, and the subsequent comparison and judgment for confirming the correct positioning position are the same as the method described in the foregoing first preferred embodiment.

[0053] In addition to the position of the foregoing first preferred embodiment of the present invention as shown in Figure 1 In addition, it can also be as shown in Figure 3As shown, when the wireless receiving device 30 is a smart phone, a tablet or a wearable device, the wireless receiving device 30 is disposed in the glove box of the co-pilot seat. In addition to the foregoing first preferred embodiment of the present invention, in which the position of the wireless receiving device 30 is set at a position close to the tire 11 of the right front wheel, in other preferred embodiments, the wireless receiving device 30 may also be set at a position close to the tire 11 of the left front wheel, which is also in the front half of the vehicle 10, as Figure 4 shown, the wireless receiving device 30 is set at a position around the steering wheel or the head-up display. At this time, the wireless tire pressure sensor 20 of the left front wheel is numbered 1, and then, in decreasing order of the strength of the wireless signal received by the wireless receiving device 30, the wireless tire pressure sensors 20 are sequentially numbered 2, 3, and 4 and are located at the positioning positions of the right front wheel, the left rear wheel, and the right rear wheel of the vehicle 10 respectively; in this preferred embodiment, the method of confirming that the positioning positions of the wireless tire pressure sensors 20 numbered 1 to 4 are correct is the same as that of the foregoing first preferred embodiment; and when looking up and comparing in the wireless signal strength table listed in the same manner as Table 2, the wireless signal strengths received by the wireless receiving devices of each number conform to the following formula: RSSI 12 / 21 ≈RSSI 34 / 43 >RSSI 13 / 31 ≈RSS 24 / 42 >RSSI 14 / 41 ≈RSSI 23 / 32 .

[0054] In addition to the foregoing first preferred embodiment of the present invention, in which the position of the wireless receiving device 30 is set at a position close to the tire 11 of the right front wheel, in other preferred embodiments, the wireless receiving device 30 may also be set at a position close to the tire 11 of the right rear wheel in the rear half of the vehicle 10. At this time, the wireless tire pressure sensor 20 of the right rear wheel is numbered 1, and then, in decreasing order of the strength of the wireless signal received by the wireless receiving device 30, the wireless tire pressure sensors 20 are sequentially numbered 2, 3, and 4 and are located at the positioning positions of the left rear wheel, the right front wheel, and the left front wheel of the vehicle 10 respectively; in this preferred embodiment, the method of confirming that the positioning positions of the wireless tire pressure sensors 20 numbered 1 to 4 are correct is the same as that of the foregoing first preferred embodiment; and when looking up and comparing in the wireless signal strength table listed in the same manner as Table 2, the wireless signal strengths received by the wireless receiving devices of each number conform to the following formula: RSSI 12 / 21 ≈RSSI 34 / 43 >RSSI 13 / 31 ≈RSS 24 / 42 >RSSI 14 / 41 ≈RSSI 23 / 32 .

[0055] In addition to the aforementioned first preferred embodiment of the present invention, in which the position of the wireless receiving device 30 is set near the tire 11 of the right front wheel, in other preferred embodiments, the wireless receiving device 30 can also be set near the tire 11 of the left rear wheel in the rear half of the vehicle 10. At this time, the wireless tire pressure sensor 20 of the left rear wheel is given the number 1, and then, in decreasing order of the intensity of the wireless signals received by the wireless receiving device 30, the wireless tire pressure sensors 20 are successively given the numbers 2, 3, and 4, and their positioning positions are respectively located at the right rear wheel, left front wheel, and right front wheel of the vehicle 10; in this preferred embodiment, the method of confirming the correct positioning positions of the wireless tire pressure sensors 20 numbered 1 to 4 is the same as that of the aforementioned first preferred embodiment; and when comparing by looking up the wireless signal intensity table listed in the same way as Table 2, the intensity of the wireless signals received by each numbered wireless receiving device conforms to the following formula: RSSI 12 / 21 ≈RSSI 34 / 43 >RSSI 13 / 31 ≈RSS 24 / 42 >RSSI 14 / 41 ≈RSSI 23 / 32 。

[0056] In addition to the aforementioned first preferred embodiment of the present invention, which is applied to a four-wheel vehicle 10, it can also be applied to a six-wheel motor vehicle. Please refer to Figure 5 the second preferred embodiment shown. The method steps of the second preferred embodiment of the present invention are substantially the same as those of the first preferred embodiment. The main difference is that an additional tire 11 is provided inside the original tires 11 of the right rear wheel and the left rear wheel respectively, so that the left rear wheel and the right rear wheel each have two tires 11. The intensity of the wireless signals received by the wireless tire pressure sensors 20 installed on the two tires 11 on each rear side by the wireless receiving device 30 is similar to the intensity values of the signals received by the wireless tire pressure sensors 20 numbered 3 and 4 in the first preferred embodiment. Therefore, in this preferred embodiment, the numbers of the two wireless tire pressure sensors 20 of the right rear wheel are grouped and set as numbers 3-1 and 3-2 belonging to number 3, and the numbers of the two wireless tire pressure sensors 20 of the left rear wheel are grouped and set as numbers 4-1 and 4-2 belonging to number 4 for number allocation. When comparing the wireless signal intensities, the wireless tire pressure sensors 20 with the same group numbers are first compared with the wireless tire pressure sensors 20 numbered 1 and 2.

[0057] When it is determined in the same method as in the first preferred embodiment that the two wireless tire pressure sensors 20 numbered 3 are located on the right rear wheel of the vehicle 10 and the two wireless tire pressure sensors 20 numbered 4 are located on the left rear wheel of the vehicle 10, the wireless signal reception strengths (RSSIs) between the wireless tire pressure sensors 20 numbered 3-1 and 3-2 and the wireless tire pressure sensor 20 numbered 1 are used to determine that the one with a stronger signal is the wireless tire pressure sensor 20 numbered 3-1 (located directly behind the wireless tire pressure sensor 20 numbered 1) and the one with a weaker signal is the wireless tire pressure sensor 20 numbered 3-2; then, the wireless signal reception strengths (RSSIs) between the wireless tire pressure sensors 20 numbered 4-1 and 4-2 and the wireless tire pressure sensor 20 numbered 2 are used to determine that the one with a stronger signal is the wireless tire pressure sensor 20 numbered 4-1 (located directly behind the wireless tire pressure sensor 20 numbered 2) and the one with a weaker signal is the wireless tire pressure sensor 20 numbered 4-2, thereby locating the positions of the wireless tire pressure sensors 20 with each number on the six tires 11.

[0058] Please refer to Figure 6 As shown in the third preferred embodiment of the present invention, a method for positioning wireless tire pressure sensors of a motor vehicle is provided. Four wireless tire pressure sensors 20 are respectively installed on the four tires 11 of the right front wheel, left front wheel, right rear wheel, and left rear wheel of the vehicle 10, thereby applying to the vehicle 10 with four tires 11 to form a positioning system; each wireless tire pressure sensor 20 also has the aforementioned unique identifier. At a position closer to one of the tires 11 where a wireless tire pressure sensor 20 is installed, in this preferred embodiment, a wireless receiving device 30 is set at a position closer to the tire 11 of the right front wheel; each wireless tire pressure sensor 20 is a Bluetooth tire pressure sensor, and the wireless receiving device 30 is a Bluetooth tire pressure receiver; the positioning method for determining which tire 11 of the vehicle 10 each wireless tire pressure sensor 20 is located on includes:

[0059] Start the wireless receiving device 30 to cause the wireless receiving device 30 to start searching for the signals of the surrounding wireless tire pressure sensors 20. To avoid interference from other external wireless devices during subsequent wireless communication with each wireless tire pressure sensor 20, optionally, the wireless receiving device 30 can arbitrarily lock one byte of the six bytes (Bytes) of the unique identifier of each wireless tire pressure sensor 20, and thereafter the wireless receiving device 30 only communicates with the wireless tire pressure sensor 20 having the same byte at the same position of the unique identifier.

[0060] After the wireless receiving device 30 searches for each surrounding wireless tire pressure sensor 20, it records the signals transmitted by each wireless tire pressure sensor 20, analyzes them, and assigns different numbers according to the strength of their received wireless signal strength (RSSI; Received Signal Strength Indication). In this preferred embodiment, the wireless receiving device 30 is assigned the number 0, and the remaining wireless tire pressure sensors 20 are assigned the numbers 1-4 according to the descending order of the wireless signal strength received by the wireless receiving device 30. The wireless signal strengths received by the wireless receiving device 30 from each wireless tire pressure sensor 20 are shown in Table 3 below:

[0061] Number 1 Number 2 Number 3 Number 4 Number 0 <![CDATA[RSSI 01 > <![CDATA[RSSI 02 > <![CDATA[RSSI 02 > <![CDATA[RSSI 02 >

[0062] Table 3. Table of Wireless Signal Strengths Received by the Wireless Receiving Device

[0063] The wireless receiving device 30 transmits a broadcast action of a positioning command, requiring each of the wireless tire pressure sensors 20 numbered 1-4 to transmit multiple packets (the number of packet pens is adjusted according to the accuracy requirement) to it in a variable power level manner with each step increasing by one order of power at each power level. In this preferred embodiment, the set variable power levels are from 0 to 3, and each wireless tire pressure sensor 20 is made to transmit 20 packets to the wireless receiving device 30 at power levels 0-3 respectively (the number of packet pens is proportional to the accuracy requirement).

[0064] The wireless receiving device 30 establishes the received wireless signal strengths of each numbered wireless tire pressure sensor 20 as shown in Table 4:

[0065] Number 1 Number 2 Number 3 Number 4 Power level 0 <![CDATA[RSSI 01 > <![CDATA[RSSI 02 > <![CDATA[RSSI 03 > <![CDATA[RSSI 04 > Power level 1 <![CDATA[RSSI 11 > <![CDATA[RSSI 12 > <![CDATA[RSSI 13 > <![CDATA[RSSI 14 > Power level 2 <![CDATA[RSSI 21 > <![CDATA[RSSI 22 > <![CDATA[RSSI 23 > <![CDATA[RSSI 24 > Power level 3 <![CDATA[RSSI 31 > <![CDATA[RSSI 32 > <![CDATA[RSSI 33 > <![CDATA[RSSI 34 >

[0066] Table 4. Table of Wireless Signal Strengths Received by the Wireless Receiving Device

[0067] The wireless receiving device 30 establishes the packet arrival rates of each numbered wireless tire pressure sensor 20 as shown in Table 5:

[0068]

[0069]

[0070] Table 5. Table of Packet Arrival Rates Received by the Wireless Receiving Device

[0071] According to the content recorded in Table 4 and Table 5, based on the relationship between the received signal strength indication (RSSI) and the packet delivery ratio (PDR) of each wireless tire pressure sensor 20 (PDR is the number of received packets divided by the total number of transmitted packets. For example, a PDR of 80% means that when 20 packets are transmitted, 16 packets are received). For example, in the PDR values of each power level in this preferred embodiment, the numerical trend of the packet delivery ratio of the wireless tire pressure sensors 20 numbered 1-4 is from large to small. Since a larger packet delivery ratio trend indicates a closer distance, the distances between each numbered wireless tire pressure sensor 20 and the wireless receiving device 30 can be estimated. Among them, the wireless tire pressure sensor 20 numbered 1 is the closest, the wireless tire pressure sensor 20 numbered 2 is the second closest, and the remaining numbered wireless tire pressure sensors 20 follow in sequence. It is located that the wireless tire pressure sensors 20 numbered 1, 2, 3, and 4 are respectively at the tire 11 positions of the right front wheel, left front wheel, right rear wheel, and left rear wheel of the vehicle 10.

[0072] In addition to the aforementioned third preferred embodiment of the present invention, where the wireless receiving device 30 searches for each surrounding wireless tire pressure sensor 20 to assign numbers to each wireless tire pressure sensor 20, and then the wireless receiving device 30 transmits a broadcast action of a positioning instruction, causing each wireless tire pressure sensor 20 numbered 1-4 to transmit multiple packets to the wireless receiving device 30 at each power level in a variable power level manner of increasing one power level each time for subsequent positioning of each numbered wireless tire pressure sensor 20. In other preferred embodiments, the wireless receiving device 30 may not be used as the initiating component for positioning. Instead, it is set that when the vehicle 10 starts moving, the gravity sensors of each wireless tire pressure sensor 20 detect the movement, causing each wireless tire pressure sensor 20 to actively search for the wireless receiving device 30 and transmit signals to the wireless receiving device 30 according to the settings of the internal program. The wireless receiving device 30 assigns different numbers to each wireless tire pressure sensor 20 according to the strength of the received signal strength indication (RSSI) of each wireless tire pressure sensor 20. And each wireless tire pressure sensor 20 actively executes a broadcast action of a positioning instruction according to the settings of the internal program. According to the settings, each wireless tire pressure sensor 20 numbered 1-4 transmits multiple packets to the wireless receiving device 30 at each power level in a variable power level manner of increasing one power level each time. The subsequent positioning judgment of each numbered wireless tire pressure sensor 20 is the same as the method described in the aforementioned third preferred embodiment.

[0073] In addition to the aforementioned third preferred embodiment of the present invention, where the wireless receiving device 30 receives packets with varying power levels transmitted by each numbered wireless tire pressure sensor 20, in another embodiment, the wireless receiving device 30 can also directly transmit packets to each numbered wireless tire pressure sensor 20 at varying power levels for reception, and instruct each numbered wireless tire pressure sensor 20 to transmit the received results back to the wireless receiving device 30 for consolidation and table creation, based on which the positioning of each numbered wireless tire pressure sensor 20 is determined.

[0074] In this other embodiment, after the wireless receiving device 30 searches for each surrounding wireless tire pressure sensor 20, the signals transmitted by each wireless tire pressure sensor 20 to it are recorded, and the wireless receiving device 30 is given the number 0. Then, according to the arrangement of the received wireless signal strengths of the wireless receiving device 30 from largest to smallest, the remaining wireless tire pressure sensors 20 are given the numbers 1 - 4 as in the aforementioned table 3. After that, compared with the second embodiment, the wireless receiving device 30 directly transmits multiple packets (the number of packet pens is adjusted according to the accuracy requirement) to each wireless tire pressure sensor 20 at a varying power level with each increase of one power level. In another embodiment, the set varying power level is also from 0 to 3 as in the second preferred embodiment, and the wireless receiving device 30 transmits 20 packets (the number of packet pens is proportional to the accuracy requirement) to each wireless tire pressure sensor 20 at power levels 0 - 3 for reception by each wireless tire pressure sensor 20.

[0075] Then each numbered wireless tire pressure sensor 20 transmits the wireless signal strength and packet arrival rate received at each power level back to the wireless receiving device 30, and the wireless receiving device 30 consolidates and creates a wireless signal strength table for each numbered wireless tire pressure sensor 20 receiving the wireless receiving device 30 as shown in Table 6:

[0076] Number 1 Number 2 Number 3 Number 4 Power level 0 <![CDATA[RSSI 01 > <![CDATA[RSSI 02 > <![CDATA[RSSI 03 > <![CDATA[RSSI 04 > Power level 1 <![CDATA[RSSI 11 > <![CDATA[RSSI 12 > <![CDATA[RSSI 13 > <![CDATA[RSSI 14 > Power level 2 <![CDATA[RSSI 21 > <![CDATA[RSSI 22 > <![CDATA[RSSI 23 > <![CDATA[RSSI 24 > Power level 3 <![CDATA[RSSI 31 > <![CDATA[RSSI 32 > <![CDATA[RSSI 33 > <![CDATA[RSSI 34 >

[0077] Table 6, Wireless Signal Strength Table Consolidated and Created by the Wireless Receiving Device

[0078] The wireless receiving device 30 consolidates and creates a packet arrival rate table for each numbered wireless tire pressure sensor 20 receiving the wireless receiving device 30 as shown in Table 7:

[0079] Number 1 Number 2 Number 3 Number 4 Power level 0 <![CDATA[PDR 01 > <![CDATA[PDR 02 > <![CDATA[PDR 03 > <![CDATA[PDR 04 > Power level 1 <![CDATA[PDR 11 > <![CDATA[PDR 12 > <![CDATA[PDR 13 > <![CDATA[PDR 14 > Power level 2 <![CDATA[PDR 21 > <![CDATA[PDR 22 > <![CDATA[PDR 23 > <![CDATA[PDR 24 > Power level 3 <![CDATA[PDR 31 > <![CDATA[PDR 32 > <![CDATA[PDR 33 > <![CDATA[PDR 34 >

[0080] Table 7, Packet Arrival Rate Table Consolidated and Created by the Wireless Receiving Device

[0081] According to the contents recorded in Tables 6 and 7, the relationship between the wireless signal receiving strength (RSSI) and the packet delivery ratio (PDR) established by the wireless receiving device 30 (PDR is the number of received packets divided by the total number of transmitted packets, for example, 80% PDR means that 16 packets are received when 20 packets are transmitted). For example, in the PDR values of each power level of the preferred embodiment, the numerical trend of the packet delivery ratio of the wireless tire pressure sensors 20 numbered 1-4 is from large to small. Since the larger the packet delivery ratio trend is, the closer the distance is, the distance between the wireless tire pressure sensors 20 numbered and the wireless receiving device 30 can be inferred, wherein the wireless tire pressure sensor 20 numbered 1 is the closest, the wireless tire pressure sensor 20 numbered 2 is the second closest, and the other wireless tire pressure sensors 20 numbered are similar. The wireless tire pressure sensors 20 numbered 1, 2, 3 and 4 are located at the tires 11 of the right front wheel, the left front wheel, the right rear wheel and the left rear wheel of the automobile 10, respectively.

[0082] In addition to the aforementioned third preferred embodiment and another preferred embodiment of the present invention, the wireless receiving device 30 is set at a position close to the tire 11 of the right front wheel. In other preferred embodiments, the wireless receiving device 30 can also be set close to the positions of the remaining tires 11. At this time, the judgment principle that the greater the packet arrival rate trend is, the closer the distance to the wireless receiving device 30 is indicated. The distance from the wireless receiving device 30 is calculated based on the packet arrival rate of each numbered wireless tire pressure sensor 20, and the position of each numbered wireless tire pressure sensor 20 at the tire 11 of the automobile 10 is located. From the above description, it can be seen that the wireless tire pressure sensor positioning method of the third preferred embodiment and another preferred embodiment of the present invention can be used to locate the position of each numbered wireless tire pressure sensor 20 at the tire 11 of the automobile 10, regardless of whether the wireless receiving device 30 is a smart phone, a tablet or a wearable device, or the position where the wireless receiving device 30 is set, such as the position in the glove box of the co-pilot seat, the steering wheel or the head-up display. In addition, the method of the second preferred embodiment can also be combined with the first preferred embodiment to double-confirm the correct positioning of each numbered wireless tire pressure sensor 20 in the first preferred embodiment.

[0083] In addition to the third preferred embodiment described above, the present invention is applied to a motor vehicle other than the automobile 10 and can also be applied to various motor vehicles with two or more wheels. Figure 7In the fourth preferred embodiment shown, the present invention can also be applied to a motor vehicle such as a motorcycle 10A. The method steps of the fourth preferred embodiment of the present invention are substantially the same as those of the third preferred embodiment, except that two wireless tire pressure sensors 20 are respectively installed on the front wheel and the rear wheel of the motorcycle 10A, and a wireless receiving device 30 is provided at a position closer to one of the tires 11 where the wireless tire pressure sensor 20 is installed. In this preferred embodiment, the position closer to the tire 11 of the front wheel is selected.

[0084] In the fourth preferred embodiment of the present invention, the method for positioning which tire 11 of the motorcycle 10A each wireless tire pressure sensor 20 is located on is the same as that of the aforementioned third preferred embodiment. According to the arrangement of the wireless signal strengths received by the wireless receiving device 30 from large to small, the wireless tire pressure sensors 20 on the front wheel and the rear wheel are numbered 1 and 2 respectively. And when the wireless receiving device 30 transmits a positioning instruction in a broadcast operation, each wireless tire pressure sensor 20 numbered 1-2 is required to transmit multiple packets to the wireless receiving device 30 at each power level in a variable power level manner where the power increases by one order each time.

[0085] Finally, from the relationship between the wireless signal reception strength (RSSI) and the packet delivery ratio (PDR) of each wireless tire pressure sensor 20, it is obtained that the numerical trend of the packet delivery ratios of the wireless tire pressure sensors 20 numbered 1-2 is from large to small. From this result, it is deduced that the wireless tire pressure sensor 20 numbered 1 is the closest to the wireless receiving device 30, and the wireless tire pressure sensor 20 numbered 2 is farther from the wireless receiving device 30. By using the relative distance relationship between the two wireless tire pressure sensors 20 and the wireless receiving device 30, it is located that the wireless tire pressure sensors 20 numbered 1 and 2 are respectively located at the tire 11 positions of the front wheel and the rear wheel of the motorcycle 10A.

[0086] When establishing the relationship between the wireless signal reception strength (RSSI) and the packet delivery ratio (PDR) in the fourth preferred embodiment, the technical method of the aforementioned another preferred embodiment can also be adopted and applied to the fourth preferred embodiment. The wireless receiving device 30 transmits packets to each wireless tire pressure sensor 20 numbered 1 and 2 in a variable power manner, and each numbered wireless tire pressure sensor then returns the reception result to the wireless receiving device 30 for integration to establish the relationship between the wireless signal reception strength (RSSI) and the packet delivery ratio (PDR). Based on this, the relative distance relationship between the two wireless tire pressure sensors 20 and the wireless receiving device 30 is judged, and it is located that the wireless tire pressure sensors 20 numbered 1 and 2 are respectively located at the tire 11 positions of the front wheel and the rear wheel of the motorcycle 10A.

[0087] The above are only the preferred embodiments of the present invention, and are not intended to limit the scope of the rights claimed by the present invention. Any other equivalent changes or modifications completed without departing from the spirit disclosed by the present invention shall be included within the claims of the present invention.

Claims

1. A method for positioning a wireless tire pressure sensor of a motor vehicle, characterized in that, Including the steps: A wireless Bluetooth tire pressure sensor is respectively installed on each tire of a motor vehicle, and a wireless Bluetooth receiving device is set at a position relatively close to one of the tires of the motor vehicle. Any two paired wireless Bluetooth tire pressure sensors can communicate with each other using wireless Bluetooth signals; The wireless Bluetooth receiving device searches for the surrounding wireless Bluetooth tire pressure sensors. After identifying the identities of the wireless Bluetooth tire pressure sensors, one byte of the unique identifier of each wireless Bluetooth tire pressure sensor is locked. The wireless Bluetooth receiving device only communicates with the wireless Bluetooth tire pressure sensors having the same byte at the same position of the unique identifier thereafter. The identifier includes a media access control address, which has multiple bytes; Each wireless Bluetooth tire pressure sensor transmits a wireless Bluetooth signal to the wireless Bluetooth receiving device. The wireless Bluetooth receiving device gives different marks and the positioning position of which tire of the motor vehicle according to the strength of the wireless Bluetooth signal transmitted by each wireless Bluetooth tire pressure sensor to it; Each marked wireless Bluetooth tire pressure sensor respectively reads the wireless Bluetooth signal strength of other marked wireless Bluetooth tire pressure sensors, establishes the wireless Bluetooth signal strength relationship between any two paired wireless Bluetooth tire pressure sensors, and verifies whether the positioning positions of the wireless Bluetooth tire pressure sensors are correct based on this wireless Bluetooth signal strength relationship; The marked wireless Bluetooth tire pressure sensors respectively transmit wireless signals to the wireless Bluetooth receiving device and send multiple packets; The wireless Bluetooth receiving device estimates the distance between the wireless Bluetooth receiving device and each marked wireless Bluetooth tire pressure sensor according to the size trend of the packet arrival rate of each marked wireless Bluetooth tire pressure sensor, and verifies again whether the positioning positions of the wireless Bluetooth tire pressure sensors are correct; Summarize and establish the relationship between the wireless Bluetooth signal strength and the packet arrival rate between any two paired wireless Bluetooth tire pressure sensors, and judge the relative distance relationship between each wireless Bluetooth tire pressure sensor and the wireless Bluetooth receiving device based on this; 2. The method for positioning a wireless tire pressure sensor of a motor vehicle according to claim 1, characterized in that, The wireless Bluetooth receiving device searches for the surrounding wireless Bluetooth tire pressure sensors, identifies the identities of the wireless Bluetooth tire pressure sensors and enables the wireless Bluetooth tire pressure sensors to transmit wireless signals to it; the wireless Bluetooth receiving device sequentially requests each marked wireless Bluetooth tire pressure sensor to act, and makes each marked wireless Bluetooth tire pressure sensor respectively read the wireless signal strength of other marked wireless Bluetooth tire pressure sensors.

3. The method for positioning a wireless tire pressure sensor of a motor vehicle according to claim 1, characterized in that, When the motor vehicle starts, the gravity sensors of the wireless Bluetooth tire pressure sensors detect the movement, causing the wireless Bluetooth tire pressure sensors to transmit wireless signals to the wireless receiving device according to the setting of the internal program, and respectively read the wireless signal strength of other marked wireless Bluetooth tire pressure sensors according to the setting of the internal program.

4. The method for positioning a wireless tire pressure sensor of a motor vehicle according to any one of claims 1 to 3, characterized in that, The motor vehicle has four of the above-mentioned tires. The marks are numbers. The wireless receiving device is located in the front half of the motor vehicle and gives numbers 1, 2, 3, and 4 from strong to weak according to the strength of the wireless signals transmitted by the wireless Bluetooth tire pressure sensors to it. The wireless Bluetooth tire pressure sensor numbered 1 is the closest to the wireless Bluetooth receiving device; When the wireless signal strength of the wireless Bluetooth tire pressure sensors numbered 2 and 1 is approximately equal to the wireless signal strength of the wireless Bluetooth tire pressure sensors numbered 3 and 4, it is confirmed that the wireless Bluetooth tire pressure sensors numbered 2 and 1 are located on the two front wheels, and the wireless Bluetooth tire pressure sensors numbered 3 and 4 are located on the two rear wheels. Then, compare the wireless signal strength between the wireless Bluetooth tire pressure sensors numbered 1, 3 and 1, 4, or compare the wireless signal strength between the wireless Bluetooth tire pressure sensors numbered 2, 3 and 2, 4, to confirm which one of the wireless Bluetooth tire pressure sensors numbered 3 and 4 is on the same side of the motor vehicle as the wireless Bluetooth receiving device, and verify whether the positioning positions of the wireless Bluetooth tire pressure sensors are correct.

5. The method for positioning a wireless tire pressure sensor of a motor vehicle according to any one of claims 1 to 3, characterized in that, The motor vehicle has four of the said tires, and each of the marks is a number. The wireless Bluetooth receiving device is located in the rear half of the motor vehicle and assigns numbers 1, 2, 3, and 4 to the wireless Bluetooth tire pressure sensors in descending order of the strength of the wireless signals transmitted to it by the wireless Bluetooth tire pressure sensors, where the wireless Bluetooth tire pressure sensor numbered 1 is the closest to the wireless Bluetooth receiving device; When the wireless signal strength of the wireless Bluetooth tire pressure sensors numbered 2 and 1 is approximately equal to the wireless signal strength of the wireless Bluetooth tire pressure sensors numbered 3 and 4, it is confirmed that the wireless Bluetooth tire pressure sensors numbered 2 and 1 are located on the two rear wheels, and the wireless Bluetooth tire pressure sensors numbered 3 and 4 are located on the two front wheels. Then, compare the wireless signal strength between the wireless Bluetooth tire pressure sensors numbered 1, 3 and 1, 4, or compare the wireless signal strength between the wireless Bluetooth tire pressure sensors numbered 2, 3 and 2, 4, to confirm which one of the wireless Bluetooth tire pressure sensors numbered 3 and 4 is on the same side of the motor vehicle as the wireless Bluetooth receiving device, and verify whether the positioning positions of the wireless Bluetooth tire pressure sensors are correct.

6. The method for positioning a wireless tire pressure sensor of a motor vehicle according to any one of claims 1 to 3, characterized in that, Each of the wireless Bluetooth tire pressure sensors with the said marks transmits wireless signals to the wireless Bluetooth receiving device in a manner of at least varying multiple power levels, and sends multiple packets at each power level; The wireless Bluetooth receiving device infers the distance between the wireless Bluetooth receiving device and each of the wireless Bluetooth tire pressure sensors with the said marks based on the trend of the packet arrival rate of each of the wireless Bluetooth tire pressure sensors at each power level. The greater the trend of the packet arrival rate, the closer the distance. Then, verify again whether the positioning positions of the wireless Bluetooth tire pressure sensors are correct.

7. The method for positioning a wireless tire pressure sensor of a motor vehicle according to claim 4, characterized in that, Each of the wireless Bluetooth tire pressure sensors with the said numbers transmits wireless signals to the wireless Bluetooth receiving device in a manner of at least varying multiple power levels, and sends multiple packets at each power level; The wireless Bluetooth receiving device infers the distance between the wireless Bluetooth receiving device and each of the wireless Bluetooth tire pressure sensors with the said numbers based on the trend of the packet arrival rate of each of the wireless Bluetooth tire pressure sensors at each power level. The greater the trend of the packet arrival rate, the closer the distance. Then, verify again whether the positioning positions of the wireless Bluetooth tire pressure sensors are correct.

8. The method for positioning a wireless tire pressure sensor of a motor vehicle according to claim 5, characterized in that, The wireless Bluetooth tire pressure sensors with each number transmit wireless signals to the wireless Bluetooth receiving device in a manner of changing at least multiple power levels, and send multiple packets at each power level; The wireless Bluetooth receiving device infers the distance between the wireless Bluetooth receiving device and the wireless Bluetooth tire pressure sensors with each number according to the trend of the packet arrival rate of the wireless Bluetooth tire pressure sensors with each number at each power level. The greater the trend of the packet arrival rate, the closer the distance. Then it verifies again whether the positioning positions of the wireless Bluetooth tire pressure sensors are correct.

9. A method for positioning a wireless tire pressure sensor of a motor vehicle, characterized in that, Including steps: Install a wireless Bluetooth tire pressure sensor on each tire of a motor vehicle, and set a wireless Bluetooth receiving device near one of the tires of the motor vehicle; The wireless Bluetooth receiving device searches for the surrounding wireless Bluetooth tire pressure sensors. After identifying the identities of the wireless Bluetooth tire pressure sensors, it locks one byte of the unique identifier of each wireless Bluetooth tire pressure sensor. The wireless Bluetooth receiving device only communicates with the wireless Bluetooth tire pressure sensors with the same position and the same byte in the unique identifier thereafter. The identifier includes a media access control address, which has multiple bytes; Each wireless Bluetooth tire pressure sensor transmits a wireless Bluetooth signal to the wireless Bluetooth receiving device, and the wireless Bluetooth receiving device gives different marks according to the strength of the wireless Bluetooth signal transmitted by each wireless Bluetooth tire pressure sensor to it; The wireless Bluetooth tire pressure sensors with each mark transmit wireless Bluetooth signals to the wireless Bluetooth receiving device in a manner of changing at least multiple power levels, and send multiple packets at each power level. The wireless Bluetooth receiving device infers the distance between the wireless Bluetooth receiving device and the wireless Bluetooth tire pressure sensors with each mark according to the trend of the packet arrival rate of the wireless Bluetooth tire pressure sensors with each mark at each power level. The greater the trend of the packet arrival rate, the closer the distance. Then it locates the positions of the wireless Bluetooth tire pressure sensors on the tires of the motor vehicle; Any two paired wireless Bluetooth tire pressure sensors can communicate with each other using wireless Bluetooth signals. Each wireless Bluetooth tire pressure sensor with a mark reads the wireless Bluetooth signal strength of other wireless Bluetooth tire pressure sensors with marks, and establishes the wireless Bluetooth signal strength relationship between any two paired wireless Bluetooth tire pressure sensors. Then it verifies again whether the positioning positions of the wireless Bluetooth tire pressure sensors are correct based on this wireless Bluetooth signal strength relationship; Summarize and establish the relationship between the wireless Bluetooth signal strength and the packet arrival rate between any two paired wireless Bluetooth tire pressure sensors, and accordingly judge the relative distance relationship between each wireless Bluetooth tire pressure sensor and the wireless Bluetooth receiving device.

10. The method for positioning a wireless tire pressure sensor of a motor vehicle according to claim 9, characterized in that, The wireless Bluetooth receiving device searches for the surrounding wireless Bluetooth tire pressure sensors, identifies the identities of the wireless Bluetooth tire pressure sensors and enables the wireless Bluetooth tire pressure sensors to transmit wireless signals to it; the wireless Bluetooth receiving device requires the wireless Bluetooth tire pressure sensors with each mark to transmit wireless signals to it in a manner of changing at least multiple power levels.

11. The method for positioning a wireless tire pressure sensor of a motor vehicle according to claim 9, characterized in that, When the motor vehicle is in motion, the gravity sensors of each wireless Bluetooth tire pressure sensor detect the movement, causing each of the wireless Bluetooth tire pressure sensors to transmit wireless signals to the wireless Bluetooth receiving device according to the settings of the internal program, and transmit wireless signals to the wireless Bluetooth receiving device in a manner of changing at least multiple power levels according to the internal program settings.

12. The method for positioning a wireless tire pressure sensor of a motor vehicle according to any one of claims 9 to 11, characterized in that, The motor vehicle has two such tires and is divided into front wheels and rear wheels. Each of the markings is a number. The wireless Bluetooth receiving device is located in the front half of the motor vehicle and assigns numbers 1 and 2 to the wireless Bluetooth tire pressure sensors according to the strength of the wireless signals transmitted to it by each wireless Bluetooth tire pressure sensor from strong to weak. When the size trend of the packet arrival rate of the wireless Bluetooth tire pressure sensor numbered 1 at each power level is greater than that of the wireless Bluetooth tire pressure sensor numbered 2, it is determined that the wireless Bluetooth tire pressure sensor numbered 1 is located on the front wheel and the wireless Bluetooth tire pressure sensor numbered 2 is located on the rear wheel.

13. The method for positioning a wireless tire pressure sensor of a motor vehicle according to any one of claims 9 to 11, characterized in that, The motor vehicle has two such tires and is divided into front wheels and rear wheels. Each of the markings is a number. The wireless Bluetooth receiving device is located in the rear half of the motor vehicle and assigns numbers 1 and 2 to the wireless Bluetooth tire pressure sensors according to the strength of the wireless signals transmitted to it by each wireless Bluetooth tire pressure sensor from strong to weak. When the size trend of the packet arrival rate of the wireless Bluetooth tire pressure sensor numbered 1 at each power level is greater than that of the wireless Bluetooth tire pressure sensor numbered 2, it is determined that the wireless Bluetooth tire pressure sensor numbered 1 is located on the rear wheel and the wireless Bluetooth tire pressure sensor numbered 2 is located on the front wheel.

14. The method for positioning a wireless tire pressure sensor of a motor vehicle according to any one of claims 9 to 11, characterized in that, The motor vehicle has four such tires. Each of the markings is a number. The wireless Bluetooth receiving device assigns numbers 1, 2, 3, and 4 to the wireless Bluetooth tire pressure sensors according to the strength of the wireless signals transmitted to it by each wireless Bluetooth tire pressure sensor from strong to weak. When the size trend of the packet arrival rate of the wireless Bluetooth tire pressure sensors numbered 1, 2, 3, and 4 at each power level is from large to small, it is determined that the wireless Bluetooth tire pressure sensors numbered 1, 2, 3, and 4 are located on the tires at positions from near to far from the wireless Bluetooth receiving device respectively.

15. A wireless tire pressure sensor positioning system for a motor vehicle, characterized in that, Including: A motor vehicle, including at least two or more tires, with a wireless Bluetooth tire pressure sensor installed on each tire, a wireless Bluetooth receiving device is provided at a position on the motor vehicle closer to one of the tires, and any two paired wireless Bluetooth tire pressure sensors can communicate with each other using wireless Bluetooth signals; The wireless Bluetooth receiving device searches for each of the surrounding wireless Bluetooth tire pressure sensors. After identifying the identity of each wireless Bluetooth tire pressure sensor, it locks one byte of the unique identifier of each wireless Bluetooth tire pressure sensor. The wireless Bluetooth receiving device only communicates with the wireless Bluetooth tire pressure sensors with the same position and the same byte in the unique identifier thereafter. The identifier includes a media access control address, which has multiple bytes; Each wireless Bluetooth tire pressure sensor transmits a wireless Bluetooth signal to the wireless Bluetooth receiving device. The wireless receiving device assigns different markings and the positioning position of which tire on the motor vehicle to each wireless Bluetooth tire pressure sensor according to the strength of the wireless Bluetooth signal transmitted to it by each wireless Bluetooth tire pressure sensor. Each wireless Bluetooth tire pressure sensor with a label reads the wireless Bluetooth signal strength of other wireless Bluetooth tire pressure sensors with labels respectively, establishes the relationship of wireless Bluetooth signal strength between any two paired wireless Bluetooth tire pressure sensors, and verifies whether the positioning positions of the wireless Bluetooth tire pressure sensors are correct based on this wireless Bluetooth signal strength relationship; The wireless Bluetooth tire pressure sensors with each label transmit wireless signals to the wireless Bluetooth receiving device and send multiple packets; The wireless Bluetooth receiving device estimates the distance between the wireless Bluetooth receiving device and each wireless Bluetooth tire pressure sensor with a label based on the trend of the packet arrival rate of each wireless Bluetooth tire pressure sensor with a label, and verifies again whether the positioning positions of the wireless Bluetooth tire pressure sensors are correct; Summarize and establish the relationship between the wireless Bluetooth signal strength and the packet arrival rate between any two paired wireless Bluetooth tire pressure sensors, and judge the relative distance relationship between each wireless Bluetooth tire pressure sensor and the wireless Bluetooth receiving device based on this; 16. The wireless tire pressure sensor positioning system for a motor vehicle according to claim 15, wherein, The wireless Bluetooth receiving device searches for each wireless Bluetooth tire pressure sensor around it, identifies the identity of each wireless Bluetooth tire pressure sensor and makes each wireless Bluetooth tire pressure sensor transmit wireless signals to it; the wireless Bluetooth receiving device sequentially requests each wireless Bluetooth tire pressure sensor with a label to act, and makes each wireless Bluetooth tire pressure sensor with a label read the wireless signal strength of other wireless Bluetooth tire pressure sensors with labels respectively.

17. The wireless tire pressure sensor positioning system for a motor vehicle according to claim 15, characterized in that, When the motor vehicle starts, the gravity sensors of each wireless Bluetooth tire pressure sensor detect the movement, causing each wireless Bluetooth tire pressure sensor to transmit wireless signals to the wireless Bluetooth receiving device according to the setting of the internal program, and read the wireless signal strength of other wireless Bluetooth tire pressure sensors with labels respectively according to the internal program setting.

18. The wireless tire pressure sensor positioning system for a motor vehicle according to any one of claims 15 to 17, characterized in that The wireless Bluetooth tire pressure sensors with each label transmit wireless signals to the wireless Bluetooth receiving device in at least a way of changing multiple power levels, and send multiple packets at each power level; The wireless Bluetooth receiving device estimates the distance between the wireless Bluetooth receiving device and each wireless Bluetooth tire pressure sensor with a label based on the trend of the packet arrival rate of each wireless Bluetooth tire pressure sensor with a label at each power level. The greater the trend of the packet arrival rate, the closer the distance. Then it verifies again whether the positioning positions of the wireless Bluetooth tire pressure sensors are correct.

19. A wireless tire pressure sensor positioning system for a motor vehicle, characterized in that, Including: A motor vehicle, which includes at least two or more tires. A wireless Bluetooth tire pressure sensor is installed on each tire respectively, and a wireless Bluetooth receiving device is set at a position of the motor vehicle relatively close to one of the tires; The wireless Bluetooth receiving device searches for each wireless Bluetooth tire pressure sensor around it. After identifying the identity of each wireless Bluetooth tire pressure sensor, it locks one byte of the unique identifier of each wireless Bluetooth tire pressure sensor. The wireless Bluetooth receiving device only communicates with the wireless Bluetooth tire pressure sensor with the same position and the same byte in the unique identifier thereafter. The identifier includes a media access control address, which has multiple bytes; Each wireless Bluetooth tire pressure sensor transmits a wireless Bluetooth signal to the wireless Bluetooth receiving device, and the wireless Bluetooth receiving device gives different labels according to the strength of the wireless Bluetooth signal transmitted by each wireless Bluetooth tire pressure sensor to it; Each wireless Bluetooth tire pressure sensor with a mark transmits a wireless Bluetooth signal to the wireless Bluetooth receiving device in a manner of at least varying multiple power levels, and sends multiple packets at each power level. The wireless Bluetooth receiving device calculates the distance between the wireless Bluetooth receiving device and each wireless Bluetooth tire pressure sensor with a mark based on the trend of the packet arrival rate of each wireless Bluetooth tire pressure sensor with a mark at each power level. The greater the trend of the packet arrival rate, the closer the distance. Then it locates the position of each wireless Bluetooth tire pressure sensor on the tire of the motor vehicle. Any two paired wireless Bluetooth tire pressure sensors can communicate with each other using wireless Bluetooth signals. Each wireless Bluetooth tire pressure sensor with a mark reads the wireless Bluetooth signal strength of other wireless Bluetooth tire pressure sensors with marks respectively, and establishes the wireless Bluetooth signal strength relationship between any two paired wireless Bluetooth tire pressure sensors, and uses this wireless Bluetooth signal strength relationship to verify again whether the positioning positions of each wireless Bluetooth tire pressure sensor are correct. Summarize and establish the relationship between the wireless Bluetooth signal strength and the packet arrival rate between any two paired wireless Bluetooth tire pressure sensors, and based on this, judge the relative distance relationship between each wireless Bluetooth tire pressure sensor and the wireless Bluetooth receiving device.

20. The wireless tire pressure sensor positioning system for a motor vehicle according to claim 19, wherein The wireless Bluetooth receiving device searches for each wireless Bluetooth tire pressure sensor around it, identifies the identity of each wireless Bluetooth tire pressure sensor and enables each wireless Bluetooth tire pressure sensor to transmit a wireless signal to it; the wireless Bluetooth receiving device requires each wireless Bluetooth tire pressure sensor with a mark to transmit a wireless signal to it in a manner of at least varying multiple power levels.

21. The wireless tire pressure sensor positioning system for a motor vehicle according to claim 19, characterized in that, When the motor vehicle starts, the gravity sensors of each wireless Bluetooth tire pressure sensor detect the movement, so that each of the wireless Bluetooth tire pressure sensors transmits a wireless signal to the wireless Bluetooth receiving device according to the setting of the internal program, and transmits a wireless signal to the wireless Bluetooth receiving device in a manner of at least varying multiple power levels according to the internal program setting.

22. A method for positioning a wireless tire pressure sensor of a motor vehicle, characterized in that, Including steps: Install a wireless Bluetooth tire pressure sensor on each tire of a motor vehicle, and set a wireless Bluetooth receiving device at a position relatively close to one of the tires of the motor vehicle; The wireless Bluetooth receiving device searches for each of the wireless Bluetooth tire pressure sensors around it. After identifying the identity of each wireless Bluetooth tire pressure sensor, it locks one byte of the unique identifier of each wireless Bluetooth tire pressure sensor. The wireless Bluetooth receiving device only communicates with the wireless Bluetooth tire pressure sensor with the same position and the same byte in the unique identifier thereafter. The identifier includes a media access control address, which has multiple bytes; Each wireless Bluetooth tire pressure sensor transmits a wireless Bluetooth signal to the wireless Bluetooth receiving device, and the wireless Bluetooth receiving device gives different marks according to the strength of the wireless Bluetooth signal transmitted by each wireless Bluetooth tire pressure sensor to it. The wireless Bluetooth receiving device transmits wireless Bluetooth signals to the wireless Bluetooth tire pressure sensors of each label in a manner of changing at least multiple power levels, and sends multiple packets at each power level. Each wireless Bluetooth tire pressure sensor returns the reception result to the wireless Bluetooth receiving device for aggregation. Based on the trend of the packet arrival rate received by each wireless Bluetooth tire pressure sensor of each label at each power level, the greater the trend of the packet arrival rate indicates the closer the distance. The distance between each wireless Bluetooth tire pressure sensor and the wireless Bluetooth receiving device is estimated, and the position of each wireless Bluetooth tire pressure sensor on the tire of the motor vehicle is located; Any two paired wireless Bluetooth tire pressure sensors can communicate with each other using wireless Bluetooth signals. Each wireless Bluetooth tire pressure sensor of each label reads the wireless Bluetooth signal strength of other wireless Bluetooth tire pressure sensors of each label, and establishes the wireless Bluetooth signal strength relationship between any two paired wireless Bluetooth tire pressure sensors. Based on this wireless Bluetooth signal strength relationship, it is verified again whether the positioning positions of each wireless Bluetooth tire pressure sensor are correct; Aggregate and establish the relationship between the wireless Bluetooth signal strength and the packet arrival rate between any two paired wireless Bluetooth tire pressure sensors, and based on this, judge the relative distance relationship between each wireless Bluetooth tire pressure sensor and the wireless Bluetooth receiving device.

23. The method for positioning a wireless tire pressure sensor of a motor vehicle according to claim 22, characterized in that, The motor vehicle has two such tires and is divided into front wheels and rear wheels. Each of the labels is a number. The wireless Bluetooth receiving device is located in the front half of the motor vehicle and assigns numbers 1 and 2 to the wireless Bluetooth tire pressure sensors in descending order of the strength of the wireless signals transmitted to it by each wireless Bluetooth tire pressure sensor. When the trend of the packet arrival rate of the wireless Bluetooth tire pressure sensor numbered 1 at each power level is greater than that of the wireless Bluetooth tire pressure sensor numbered 2, it is determined that the wireless Bluetooth tire pressure sensor numbered 1 is located on the front wheel and the wireless Bluetooth tire pressure sensor numbered 2 is located on the rear wheel.

24. The method for positioning a wireless tire pressure sensor of a motor vehicle according to claim 22, characterized in that, The motor vehicle has two such tires and is divided into front wheels and rear wheels. Each of the labels is a number. The wireless Bluetooth receiving device is located in the rear half of the motor vehicle and assigns numbers 1 and 2 to the wireless Bluetooth tire pressure sensors in descending order of the strength of the wireless signals transmitted to it by each wireless Bluetooth tire pressure sensor. When the trend of the packet arrival rate of the wireless Bluetooth tire pressure sensor numbered 1 at each power level is greater than that of the wireless Bluetooth tire pressure sensor numbered 2, it is determined that the wireless Bluetooth tire pressure sensor numbered 1 is located on the rear wheel and the wireless Bluetooth tire pressure sensor numbered 2 is located on the front wheel.

25. The method for positioning a wireless tire pressure sensor of a motor vehicle according to claim 22, characterized in that, The motor vehicle has four such tires. Each of the labels is a number. The wireless Bluetooth receiving device assigns numbers 1, 2, 3, and 4 to the wireless Bluetooth tire pressure sensors in descending order of the strength of the wireless signals transmitted to it by each wireless Bluetooth tire pressure sensor. When the trend of the packet arrival rate of the wireless Bluetooth tire pressure sensors numbered 1, 2, 3, and 4 at each power level is from large to small, it is determined that the wireless Bluetooth tire pressure sensors numbered 1, 2, 3, and 4 are located on the tires at positions from near to far from the wireless Bluetooth receiving device respectively.

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