TWI762111B - Wireless tire pressure sensor positioning method and system for motor vehicles - Google Patents

Abstract

A method for locating a wireless tire pressure sensor of a motor vehicle is to install wireless tire pressure sensors on the tires of the motor vehicle respectively, and set up a wireless receiving device near one of the tires, and the wireless receiving device transmits wireless signals by receiving each wireless tire pressure sensor. The strength of each wireless tire pressure sensor is given a different number and the positioning position of which tire of the motor vehicle is located, and then the wireless tire pressure sensor of each number is required to read the wireless signal strength of other wireless tire pressure sensors respectively, and establish any pairwise The wireless signal strength relationship between the paired wireless tire pressure sensors is used to verify whether the positioning position is correct; the present invention can locate each wireless tire pressure sensor after the installation of all wireless tire pressure sensors on the motor vehicle is completed, saving individual wireless The tire pressure sensor needs to input the operation and time of the position to the wireless receiver.

Description

Wireless tire pressure sensor positioning method and system for motor vehicles

The invention relates to a method for locating a sensor, in particular to a method for locating a wireless tire pressure sensor after installing a wireless tire pressure sensor on a tire of a motor vehicle for positioning.

The existing wireless tire pressure sensor installed on the tire of a motor vehicle needs to be paired with a 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, thereby The wireless tire pressure receiver can recognize the tire where the individual wireless tire pressure sensor is located during operation, and can issue a warning of insufficient tire pressure for the correct tire position when sensing the tire pressure and issuing a warning.

The aforementioned method of setting the tire position by pairing with the wireless tire pressure receiver before installing the wireless tire pressure sensor can achieve the effect of confirming the installation position of the individual wireless tire pressure sensor, but since the wireless tire pressure sensor is installed in front of the motor vehicle respectively. , it is necessary to pair and input the required wireless tire pressure sensors with the wireless receiving device one by one, so it takes a lot of setting time.

Since the existing wireless tire pressure sensor installed on the tire of a motor vehicle needs to be paired with a wireless tire pressure receiver before use, the problem of setting and use is relatively troublesome and time-consuming. To this end, the present invention uses a wireless receiving device to receive and determine the transmission signal of each wireless tire pressure sensor, so as to achieve the effect of locating all the wireless tire pressure sensors after installing all the wireless tire pressure sensors in a motor vehicle.

In order to achieve the above-mentioned creative purpose, the present invention provides a method for locating a wireless tire pressure sensor of a motor vehicle. A wireless receiving device, any pair of wireless tire pressure sensors can communicate with each other; each wireless tire pressure sensor transmits wireless signals to the wireless receiving device, and the wireless receiving device transmits wireless signals to it according to the wireless tire pressure sensors. The strength is given to different numbers or marks and the positioning position of which tire of the motor vehicle; the wireless tire pressure sensor of each number or mark reads the wireless signal strength of the wireless tire pressure sensors of other numbers or marks respectively, and establishes any paired pair. The wireless signal strength relationship between the wireless tire pressure sensors is used to verify whether the positioning position of each wireless tire pressure sensor is correct.

Preferably, the wireless receiving device of the present invention searches for each wireless tire pressure sensor around, identifies the identity of each wireless tire pressure sensor and makes each wireless tire pressure sensor transmit wireless signals to it; The wireless tire pressure sensor is actuated, so that the wireless tire pressure sensors of each number or mark respectively read the wireless signal strength of the wireless tire pressure sensors of other numbers or marks.

Preferably, in the present invention, when the motor vehicle starts, the gravity sensor of each wireless tire pressure sensor detects movement, so that each wireless tire pressure sensor transmits wireless signals to the wireless receiving device according to the setting of the internal program. , and read the wireless signal strength of other wireless tire pressure sensors with other numbers or marks according to the internal program settings.

Further, in the present invention, the wireless receiving device searches for the wireless tire pressure sensors in the surrounding area, and after identifying the identity of each wireless tire pressure sensor, locks one byte of the unique identification code of each wireless tire pressure sensor. It then communicates only with wireless tire pressure sensors that have the same byte of unique identification code.

Further, the wireless tire pressure sensors of each number or mark of the present invention transmit wireless signals to the wireless receiving device in a manner of changing at least a plurality of power levels, and send multiple packets at each power level; the wireless receiving device Use the size trend of the packet arrival rate of the wireless tire pressure sensor of each number or mark at each power level. When the packet arrival rate trend is larger, the distance is closer, and the distance between the wireless receiving device and the wireless tire pressure sensor of each number is calculated. From far and near, verify again whether the positioning position of each wireless tire pressure sensor is correct.

In order to achieve the above-mentioned creative purpose, the present invention also provides a method for locating a wireless tire pressure sensor of a motor vehicle. A wireless receiving device is set up; each wireless tire pressure sensor transmits wireless signals to the wireless receiving device, and the wireless receiving device gives different numbers or marks according to the strength of the wireless signal transmitted by each wireless tire pressure sensor; the wireless tire pressure sensors of each number Transmit wireless signals to the wireless receiving device in a manner of changing at least a plurality of power levels, and send multiple packets at each power level, the wireless receiving device arrives at each power level with the packets of the wireless tire pressure sensor with each number or mark The larger the packet arrival rate trend is, the closer the distance is. Calculate the distance between the wireless receiving device and each numbered wireless tire pressure sensor, and locate each wireless tire pressure sensor on the tire position of the motor vehicle.

Preferably, the wireless receiving device of the present invention searches for each wireless tire pressure sensor around, identifies the identity of each wireless tire pressure sensor and enables each wireless tire pressure sensor to transmit wireless signals to it; the wireless receiving device requires each numbered or marked wireless tire. The pressure sensor transmits a wireless signal thereto in a manner of varying at least a plurality of power levels.

Preferably, according to the present invention, when the motor vehicle starts, the gravity sensor of each wireless tire pressure sensor detects movement, so that each wireless tire pressure sensor moves to the wireless tire according to the setting of the internal program. The receiving device transmits a wireless signal, and transmits the wireless signal to the wireless receiving device in a manner of changing at least a plurality of power levels according to an internal program setting.

In order to achieve the above-mentioned creative purpose, the present invention provides a wireless tire pressure sensor positioning system for a motor vehicle, including: a motor vehicle, including at least two or more tires, each tire is respectively installed with a wireless tire pressure sensor, which is relatively close to the motor vehicle. A wireless receiving device is installed near one of the tires, and any pair of wireless tire pressure sensors can communicate with each other; each wireless tire pressure sensor transmits wireless signals to the wireless receiving device, and the wireless receiving device is based on each wireless tire pressure sensor. The strength of the wireless signal to which it is transmitted is given different numbers or marks and the location of which tire of the motor vehicle is located.

Further, each numbered or marked wireless tire pressure sensor of the present invention reads the wireless signal strength of other numbered or marked wireless tire pressure sensors respectively, and establishes a wireless signal strength relationship between any pair of wireless tire pressure sensors. , to verify whether the positioning position of each wireless tire pressure sensor is correct based on the wireless signal strength relationship.

In order to achieve the above-mentioned creative purpose, the present invention provides a wireless tire pressure sensor positioning system for a motor vehicle, including: a motor vehicle, including at least two or more tires, each tire is respectively installed with a wireless tire pressure sensor, which is relatively close to the motor vehicle. A wireless receiving device is set near one of the tires; each wireless tire pressure sensor transmits wireless signals to the wireless receiving device, and the wireless receiving device gives different numbers or marks according to the strength of the wireless signals transmitted by each wireless tire pressure sensor; or the marked wireless tire pressure sensor transmits wireless signals to the wireless receiving device in a manner of changing at least a plurality of power levels, and sends multiple packets at each power level, and the wireless receiving device uses each number or marked wireless tire pressure sensor The size trend of the packet arrival rate at each power level. The larger the packet arrival rate trend is, the closer the distance is. Calculate the wireless receiving device and each serial number. Or the distance of the marked wireless tire pressure sensor, and locate each wireless tire pressure sensor on the tire position of the motor vehicle.

Through the aforementioned positioning method and the system applied to the motor vehicle, after all the wireless tire pressure sensors are respectively installed on the tires of the motor vehicle, the wireless receiving device can search for the communication of the surrounding wireless tire pressure sensors to confirm each wireless tire pressure sensor. Where is the tire pressure sensor installed on the tire. In this way, when installing a wireless tire pressure sensor in a motor vehicle, it is not necessary to input the tire position to be installed to the wireless receiving device before each wireless tire pressure sensor is installed, which can save the need for individual wireless tire pressure sensors before installation. The operation and time for entering the location to the wireless receiver. In addition, it can also avoid the problem of alarm error caused when the wireless tire pressure sensor is installed in the wrong position due to human negligence after individually inputting the tire position to the wireless receiving device in the prior art.

10: Cars

10A: Locomotive

11: Tires

20: Wireless tire pressure sensor

30: Wireless receiving device

FIG. 1 is a schematic diagram of the arrangement of a wireless tire pressure sensor and a receiver according to the first preferred embodiment of the present invention.

FIG. 2 is a schematic diagram of the received strength of a wireless signal according to the first preferred embodiment of the present invention.

FIG. 3 is a schematic diagram of another wireless tire pressure sensor setting position according to the first preferred embodiment of the present invention.

FIG. 4 is a schematic diagram of the setting position of another wireless tire pressure sensor according to the first preferred embodiment of the present invention.

5 is a schematic diagram of the arrangement of the wireless tire pressure sensor and the receiver according to the second preferred embodiment of the present invention.

6 is a schematic diagram of the arrangement of the wireless tire pressure sensor and the receiver according to the third preferred embodiment of the present invention.

7 is a schematic diagram of the arrangement of the wireless tire pressure sensor and the receiver according to the fourth preferred embodiment of the present invention.

In order to understand the technical features and practical effects of the present invention in detail, and to implement it according to the contents of the description, the preferred embodiments shown in the drawings are further described in detail as follows.

Referring to the first preferred embodiment shown in FIG. 1 and FIG. 2 , the present invention provides a method for locating a wireless tire pressure sensor of a motor vehicle, which is to install four wireless tire pressure sensors 20 on the right front wheel, left The four tires 11 of the front wheel, the right rear wheel, and the left rear wheel are applied to the automobile 10 having the four tires 11 to constitute a positioning system. In this preferred embodiment, the unique identification codes used by each wireless tire pressure sensor 20 to identify the identity in the wireless communication transmission, that is, the media access control address (MAC) are respectively OE:03: A7: D9: F4: 05, 0E: 3C: 77: AA: BF: 42, 0E: F8: AE: 90: 48: 73, 0E: 09: BA: 49: 48: 35; with four wireless tire pressures For the sensor 20, a wireless receiving device 30 is installed at a place closer to one of the tires 11 on which the wireless tire pressure sensor 20 is installed. 20 is a bluetooth tire pressure sensor with data interactive communication function, any pair of wireless tire pressure sensors 20, that is, when each wireless tire pressure sensor 20 and the other three wireless tire pressure sensors 20 are matched in pairs, respectively. They can communicate with each other. The aforementioned wireless receiving device 30 is a Bluetooth tire pressure receiver with data interactive communication function. The Bluetooth tire pressure receiver can be a tire pressure detector host with a display, or it can be a Bluetooth tire Smartphones, tablets, car audio-visual entertainment systems or wearable devices with Bluetooth function, such as smart watches, that receive software for tire pressure detection; locating which tire 11 of the car 10 each wireless tire pressure sensor 20 is located on The method includes: after the four wireless tire pressure sensors 20 are respectively installed on the corresponding tires 11 , the wireless receiving device 30 is activated so that the wireless receiving device 30 starts to search for the signals of the surrounding wireless tire pressure sensors 20 . After identifying the identity of each wireless tire pressure sensor 20, in order 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 each wireless tire pressure sensor 20. One of the six bytes (Byte) of the unique identification code of the pressure sensor 20, in this preferred embodiment, is to lock the first byte "OE" of each unique identification code, after which the wireless receiving device 30 communicates only with the wireless tire pressure sensor 20 having the same byte in the same position of the unique identification code.

After the wireless receiving device 30 searches the surrounding wireless tire pressure sensors 20, it records the signals transmitted to it by the wireless tire pressure sensors 20, analyzes and gives different signals according to the received signal strength (RSSI; Received Signal Strength Indication). Number (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 the following embodiments, different numbers are used as examples to illustrate) and which tire 11 of the car 10 is located In some preferred embodiments with lower requirements for accuracy, the positioning position can be used as the exact location of which tire 11 the wireless tire pressure sensor 20 of each number is located without further verification and comparison described below. The actual position is used as the positioning result, and the method/system can be applied to a motor vehicle with more than two tires 11, such as a locomotive; when the required accuracy of the positioning result is high, the following positioning position verification is required.

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 the strength of the received wireless signal is the strongest, and the wireless tire pressure sensor 20 of the right front wheel is given a number The number of 1 is then given to the remaining wireless tire pressure sensors 20 with numbers 2, 3, and 4 in sequence in accordance with the decreasing strength of the wireless signal received by the wireless receiving device 30 . According to the aforementioned judgment that the stronger the wireless signal strength is, the closer the distance to the wireless receiving device 30 is, the wireless tire pressure sensors 20 preset No. 2, No. 3 and No. 4 are respectively located on the left front wheel, the right rear wheel and the left rear wheel of the car 10. The wireless signal strength of each wireless tire pressure sensor 20 received by the wireless receiving device 30 is shown in Table 1 below (the wireless signal strength RSSI ₀₁ to RSSI ₀₄ are arranged in descending order):

Then, the wireless receiving device 30 sequentially requests the wireless tire pressure sensors 20 of each number to operate, so that the wireless tire pressure sensors 20 of each number read the wireless signal strength of the wireless tire pressure sensors 20 of other numbers respectively, and then the wireless tire pressure sensors 20 of each number The pressure sensor 20 transmits the read wireless signal strength to the wireless receiving device 30, and establishes the wireless signal strength relationship between any pair of wireless tire pressure sensors 20 with each number as shown in Table 2 below:

RSSI₃₄

RSSI₄₃，意即編號2與編號1的無線胎壓傳感器20之間的無線信號強度約等於編號3與編號4的無線胎壓傳感器20之間的無線信號強度，即確認編號2與編號1的無線胎壓傳感器位於兩前輪，編號3與編號4的無線胎壓傳感器位於兩後輪。 Verify whether the positioning position of each wireless tire pressure sensor 20 is correct based on the wireless signal strength relationship disclosed in Table 2. For example, the positioning position is the wireless tire pressure sensor 20 of the left front wheel No. 2 as a reference, and the wireless tire pressure sensor 20 of No. 2 reads The obtained wireless signal strength RSSI ₂₁ should conform to the following formula: RSSI ₂₁

RSSI ₃₄

RSSI ₄₃ , which means that the wireless signal strength between the wireless tire pressure sensors 20 No. 2 and No. 1 is approximately equal to the wireless signal strength between the wireless tire pressure sensors 20 No. 3 and No. 4, that is, confirming that No. 2 and No. 1 The wireless tire pressure sensors are located on the two front wheels, and the wireless tire pressure sensors No. 3 and No. 4 are located on the two rear wheels.

The wireless signal strength RSSI ₂₁ read by the wireless tire pressure sensor 20 of No. 2 also conforms to the following formula: RSSI ₂₁ >RSSI ₂₄ >RSSI ₂₃ , which means to compare the difference between the wireless tire pressure sensors No. 2 and 3 and the wireless tire pressure sensors No. 2 and 4. The wireless signal strength between the number 3 and the number 4 wireless tire pressure sensor 20 and the wireless tire pressure sensor 20 number 2 are located on the same side of the car 10 (the preferred embodiment here is the wireless tire pressure sensor 20 number 4). The tire pressure sensor 20 and the wireless tire pressure sensor 20 of No. 2 are located on the same side of the car 10 ), the same side means that the distance is short and the wireless signal strength is high (when the positioning position is changed to the wireless tire pressure of the right front wheel No. 1 When the sensor 20 is used as a reference for comparison, the formula is in accordance with the following example: RSSI ₁₂ >RSSI ₁₃ >RSSI ₁₄ , compare the wireless signal strengths between the wireless tire pressure sensors 20 with numbers 1 and 3 and those with numbers 1 and 4, and confirm the number. The distance between the wireless tire pressure sensor 20 of No. 3 and the wireless tire pressure sensor 20 of No. 1 is relatively short, so the wireless signal strength is higher); if the above two formulas are both consistent, it can be confirmed that the positioning position of each wireless tire pressure sensor 20 is correct. of.

RSSI_34/43>RSSI_13/31

RSS_24/42>RSSI_14/41

RSSI_23/32。因此，除了前述第一較佳實施例是以編號2為基準開始進行比對以外，以任一編號為基準開始進行的比對只要無線信號強度的結果符合前述公式，即能確認前述各編號的無線胎壓傳感器20的定位位置正確；前述驗證定位位置正確的手段除了應用於四個輪胎11分別安裝四個無線胎壓傳感器20的汽車10以外，也適用於驗證三輪車或四個以上輪胎11的各式機動車輛。 Please refer to FIG. 2 , when the positioning positions of the wireless tire pressure sensors 20 of the aforementioned numbers are correct, the wireless signal strength compared through the table look-up table in Table 2 will conform to the following formula: RSSI _12/21

RSSI _34/43 >RSSI _13/31

RSS _24/42 >RSSI _14/41

RSSI _23/32 . Therefore, except that the first preferred embodiment starts the comparison with the reference number 2, the comparison with any number as the reference can confirm that the results of the wireless signal strength conform to the aforementioned formula. The positioning position of the wireless tire pressure sensor 20 is correct; the aforementioned means for verifying the correct positioning position are not only applied to the automobile 10 having four tires 11 installed with four wireless tire pressure sensors 20 respectively, but are also applicable to verifying the three-wheeled vehicle or more than four tires 11. Various types of motor vehicles.

In addition to the first preferred embodiment of the present invention, the wireless receiving device 30 searches the surrounding wireless tire pressure sensors 20 to assign the number and location of each wireless tire pressure sensor 20, and then the wireless receiving device 30 requests each wireless tire pressure sensor 20 in sequence. The numbered wireless tire pressure sensors 20 read the wireless signal strengths of other wireless tire pressure sensors 20 respectively, and then each numbered wireless tire pressure sensor 20 transmits the read wireless signal strengths to the wireless receiving device 30 for subsequent follow-up. Confirm that the positioning position is correct except for comparison. In other preferred embodiments, the wireless receiving device 30 may not be used as the initiating element for positioning, but it is set so that when the car 10 starts, the gravity sensor of each wireless tire pressure sensor 20 detects movement , so that each wireless tire pressure sensor 20 transmits wireless signals to the wireless receiving device 30 according to the setting of the internal program, and each wireless tire pressure sensor 20 reads the wireless signal strength of other wireless tire pressure sensors 20 according to the setting of the internal program. , then the wireless tire pressure sensor 20 of each number transmits the read wireless signal strength to the wireless receiving device 30, and the subsequent comparison and judgment to confirm the correct positioning position is the same as the method described in the first preferred embodiment. .

RSSI_34/43>RSSI_13/31

RSS_24/42>RSSI_14/41

RSSI_23/32。 The position of the first preferred embodiment of the present invention is not only shown in FIG. 1 , but also shown in FIG. 3 . When the wireless receiving device 30 is a smart phone, a tablet or a wearable device, the wireless receiving device 30 is located in the passenger seat glove box. In addition to the first preferred embodiment of the present invention, 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 can also be set at It is also located in the front half of the car 10 near the tire 11 of the left front wheel. As shown in FIG. 4 , the wireless receiving device 30 is arranged around the steering wheel or the head-up display. At this time, the wireless tire pressure sensor 20 of the left front wheel is assigned the number 1. Then, according to the decreasing strength of the wireless signal received by the wireless receiving device 30, the wireless tire pressure sensors 20 are sequentially assigned the numbers 2, 3 and 4, as well as those located on the right front wheel, left rear wheel and right rear wheel of the car 10. Positioning position; 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 the aforementioned first preferred embodiment; When comparing the signal strength table, the wireless signal strength received by each number of wireless receiving devices conforms to the following formula: RSSI _12/21

RSSI _34/43 >RSSI _13/31

RSS _24/42 >RSSI _14/41

RSSI _23/32 .

RSSI_34/43>RSSI_13/31

RSS_24/42>RSSI_14/41

RSSI_23/32。 In addition to the first preferred embodiment of the present invention, the position of the wireless receiving device 30 is set close to the tire 11 of the right front wheel, in other preferred embodiments, the wireless receiving device 30 can also be reconfigured The rear half of the car 10 is close to the tire 11 of the right rear wheel. At this time, the number 1 is assigned to the wireless tire pressure sensor 20 of the right rear wheel. Then, according to the intensity of the wireless signal received by the wireless receiving device 30, it is sequentially assigned to each wireless tire. The numbers of the pressure sensors 20 No. 2, No. 3 and No. 4 and the positioning positions of the left rear wheel, the right front wheel and the left front wheel of the automobile 10; The way to locate the correct position is the same as that of the aforementioned first preferred embodiment; and when comparing the wireless signal strength tables listed in the same manner in Table 2, the wireless signal strengths received by each numbered wireless receiving device conform to the following formula: RSSI _12/21

RSSI _34/43 >RSSI _13/31

RSS _24/42 >RSSI _14/41

RSSI _23/32 .

RSSI_34/43>RSSI_13/31

RSS_24/42>RSSI_14/41

RSSI_23/32。 In addition to the first preferred embodiment of the present invention, 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 can also be set at The rear half of the car 10 is close to the position of the tire 11 of the left rear wheel. At this time, the wireless tire pressure sensor 20 of the left rear wheel is assigned the number 1, and then the wireless tire pressure sensor is sequentially assigned to each wireless tire pressure sensor according to the decreasing strength of the wireless signal received by the wireless receiving device 30. 20 The numbers of No. 2, No. 3 and No. 4 and the positioning positions of the right rear wheel, left front wheel and right front wheel of the automobile 10; in this preferred embodiment, confirm the positioning positions of the wireless tire pressure sensors 20 of Nos. 1 to 4 The correct way is the same as the aforementioned first preferred embodiment; and when comparing the wireless signal strength tables listed in the same way in Table 2, the wireless signal strengths received by the wireless receiving devices of each number conform to the following formula: RSSI _{12/ twenty one}

RSSI _34/43 >RSSI _13/31

RSS _24/42 >RSSI _14/41

RSSI _23/32 .

In addition to the aforementioned first preferred embodiment, the present invention can be applied to a six-wheeled motor vehicle in addition to a four-wheeled automobile 10 . Please refer to the second preferred embodiment shown in FIG. 5 . 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 a tire 11 is provided on the inner side of the original tire 11 of the right rear wheel and the left rear wheel, so that the left rear wheel and the The right rear wheel has two tires 11 respectively, and the wireless signal strength of the wireless tire pressure sensor 20 installed on the two tires 11 on the rear side is received by the wireless receiving device 30, which is the same as that of No. 3 and No. 4 in the first preferred embodiment. The signal strength values of the wireless tire pressure sensors 20 received by the wireless receiving device 30 are similar. Therefore, in this preferred embodiment, the numbers of the two wireless tire pressure sensors 20 of the right rear wheel are set as groups belonging to the number 3. Numbers 3-1 and 3-2, and assign numbers to numbers 4-1 and 4-2 belonging to number 4 by grouping the numbers of the two wireless tire pressure sensors 20 on the left rear wheel to compare the wireless signal strengths First, compare the wireless tire pressure sensors 20 with the same group number with the wireless tire pressure sensors 20 with numbers 1 and 2.

When it is determined in the same way as in the first preferred embodiment that the two wireless tire pressure sensors 20 belonging to No. 3 are located on the right rear wheel of the car 10 , and the two wireless tire pressure sensors 20 belonging to No. 4 are located on the rear right wheel of the car 10 After the left rear wheel, according to the wireless signal received strength (RSSI) between the wireless tire pressure sensor 20 of number 3-1 and 3-2 respectively and the wireless tire pressure sensor 20 of number 1, it is judged that the signal with the stronger signal is number 3-1 (located in number 1). The wireless tire pressure sensor 20 is directly behind the wireless tire pressure sensor 20) and the weak one is the wireless tire pressure sensor 20 numbered 3-2; and then the wireless tire pressure sensor 20 numbered 4-1 and 4-2 and the wireless tire pressure sensor 20 numbered 2 are used to receive wireless signals. Strength (RSSI), the stronger signal is No. 4-1 (located directly behind the wireless tire pressure sensor 20 of No. 2) and the weaker signal is No. 4-2 The wireless tire pressure sensor 20 is used to locate the position of the wireless tire pressure sensor 20 of each number on the six tires 11 .

Please refer to the third preferred embodiment of the present invention shown in FIG. 6 , which provides a method for locating a wireless tire pressure sensor of a motor vehicle. Four wireless tire pressure sensors 20 are respectively installed on the right front wheel, left front wheel, right The four tires 11 of the rear wheel and the left rear wheel are applied to the automobile 10 with four tires 11 to form a positioning system; each wireless tire pressure sensor 20 also has the unique identification code, and is installed nearer to one of the tires 11. For the tire 11 of the wireless tire pressure sensor 20, a wireless receiving device 30 is installed at the tire 11 closer to the right front wheel in this preferred embodiment; each wireless tire pressure sensor 20 is a Bluetooth tire pressure sensor, and the wireless receiver The device 30 is a Bluetooth tire pressure receiver; the method for locating which tire 11 of the automobile 10 each wireless tire pressure sensor 20 is located on includes: Activate the wireless receiving device 30 so that the wireless receiving device 30 starts to search for the signals of the surrounding wireless tire pressure sensors 20 . The wireless receiving device 30 can arbitrarily lock one of the six bytes of the unique identification code of each wireless tire pressure sensor 20, and thereafter the wireless receiving device 30 only has the same word in the same position as the unique identification code The wireless tire pressure sensor 20 of the section communicates.

After the wireless receiving device 30 searches the surrounding wireless tire pressure sensors 20, it records the signals transmitted to it by the wireless tire pressure sensors 20, analyzes and gives different signals according to the received signal strength (RSSI; Received Signal Strength Indication). Numbering. In this preferred embodiment, the wireless receiving device 30 is given a serial number of 0, and the other wireless tire pressure sensors 20 are given serial numbers 1-4 according to the order of the wireless signal strength received by the wireless receiving device 30 from large to small. , the wireless signal strength of each wireless tire pressure sensor 20 received by the wireless receiving device 30 is shown in Table 3 below:

The wireless receiving device 30 transmits a broadcast action of a positioning command, requesting the wireless tire pressure sensors 20 numbered 1-4 to transmit multiple packets ( The number of packets is adjusted according to the accuracy requirements). In this preferred embodiment, the set variable power level is from 0 to 3, and each wireless tire pressure sensor 20 transmits 20 packets to the wireless receiving device 30 at power levels 0-3 respectively (the number of packets is based on the proportional to the accuracy requirements).

The wireless signal strength of the wireless tire pressure sensor 20 received by the wireless receiving device 30 is established as shown in Table 4:

The packet arrival rate of the wireless tire pressure sensor 20 received by the wireless receiving device 30 is established as shown in Table 5:

According to the contents recorded in Tables 4 and 5, the relationship between the wireless signal received strength (RSSI) of each wireless tire pressure sensor 20 and the Packet Delivery Ratio (PDR) (PDR is the number of receptions divided by the total number of transmissions, for example 80% of the PDR is when 20 packets are transmitted and 16 packets are received), for example, in the PDR value of each power level in this preferred embodiment, the numerical trend of the packet arrival rate of the wireless tire pressure sensor 20 numbered 1-4 It is from large to small, because the larger the packet arrival rate trend is, the closer the distance is. Therefore, the distance between the wireless tire pressure sensor 20 of each number and the wireless receiving device 30 can be calculated, and the wireless tire pressure sensor 20 with number 1 is the closest. , the wireless tire pressure sensor of No. 2 is nearly 20 times, and the rest The numbered wireless tire pressure sensors 20 and so on, the wireless tire pressure sensors 20 located at number 1, number 2, number 3, and number 4 are the tires located on the right front wheel, left front wheel, right rear wheel, and left rear wheel of the car 10, respectively. 11 locations.

In addition to the aforementioned third preferred embodiment of the present invention, the wireless receiving device 30 searches the surrounding wireless tire pressure sensors 20 to assign the numbers of the wireless tire pressure sensors 20, and then the wireless receiving device 30 transmits the broadcasting action of the positioning command, Let each wireless tire pressure sensor 20 numbered 1-4 transmit a plurality of packets to the wireless receiving device 30 at each power level in a variable power hierarchy manner in which the power is increased by one order each time for the subsequent wireless tire pressure sensors of each number. In addition to the positioning of 20, in other preferred embodiments, the wireless receiving device 30 may not be used as the initiating element for positioning, but is set as the gravity sensor of each wireless tire pressure sensor 20 when the car 10 is driven. Due to the detection of movement, each wireless tire pressure sensor 20 actively searches for the wireless receiving device 30 according to the setting of the internal program and transmits the signal to the wireless receiving device 30 for the wireless receiving device 30 to follow each wireless tire pressure sensor 20 The strength of the wireless signal reception strength (RSSI) of the wireless tire pressure sensor 20 is given different numbers, and each wireless tire pressure sensor 20 actively executes the broadcasting action of the positioning command according to the setting of the internal program. The variable power hierarchy method in which the first-order power is increased each time, transmits multiple packets to the wireless receiving device 30 at each power level, and the subsequent positioning determination of the wireless tire pressure sensors 20 of each number is the same as that described in the third preferred embodiment. method is the same.

In addition to the above-mentioned third preferred embodiment of the present invention, the wireless receiving device 30 receives the packets of varying power levels transmitted from the wireless tire pressure sensors 20 of each serial number. In another embodiment, the wireless receiving device 30 can also be used In the way of changing the power level, the packets are directly transmitted at each power level to the wireless tire pressure sensor 20 of each number for reception, and the wireless tire pressure sensor 20 of each number sends the received result back to the wireless receiving device 30 to compile a table. , according to which the positioning determination of the wireless tire pressure sensor 20 of each serial number is performed.

In this other embodiment, after the wireless receiving device 30 searches the surrounding wireless tire pressure sensors 20, the signals transmitted to it by the wireless tire pressure sensors 20 are recorded, and the wireless receiving device 30 is given a serial number of 0. , and according to the order of the wireless signal strength received by the wireless receiving device 30 from large to small, the numbers 1-4 of the remaining wireless tire pressure sensors 20 are given as shown in Table 3 above. Compared with the second implementation, the wireless receiving device 30 For example, directly transmit multiple packets to each wireless tire pressure sensor 20 at each power level in a variable power hierarchy method in which the power is increased by one order each time (the number of packets is adjusted according to the requirement of accuracy). In the embodiment, the set variable power level is from 0 to 3 as in the second preferred embodiment, so that the wireless receiving device 30 transmits 20 packets (packet pen) to each wireless tire pressure sensor 20 at power levels 0-3 respectively. The number system is proportional to the requirement of accuracy) for each wireless tire pressure sensor 20 to receive.

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 collects and establishes each numbered wireless tire pressure sensor 20 to receive the wireless tire pressure sensor 20 of each number. The wireless signal strength table of the wireless receiving device 30 is shown in Table 6:

The packet arrival rate table of each number of wireless tire pressure sensors 20 received by the wireless receiving device 30 is compiled and established in the wireless receiving device 30 as shown in Table 7:

According to the contents recorded in Tables 6 and 7, the relationship between the received wireless signal strength (RSSI) and the packet arrival rate (Packet Delivery Ratio; PDR) established by the wireless receiving device 30 (PDR is the number of receptions divided by the total number of transmissions, For example, 80% of the PDR is when 20 packets are transmitted and 16 packets are received.) For example, among the PDR values of each power level in this preferred embodiment, the value of the packet arrival rate of the wireless tire pressure sensor 20 numbered 1-4 The trend is from large to small. Since the larger the trend of the packet arrival rate is, the closer the distance is. Therefore, the distance between the wireless tire pressure sensor 20 of each number and the wireless receiving device 30 can be calculated, and the wireless tire pressure sensor 20 with number 1 can be calculated. Recently, the wireless tire pressure sensor No. 2 has been approached 20 times, and the other wireless tire pressure sensors 20 are deduced by analogy. The wireless tire pressure sensors 20 of No. 1, No. 2, No. 3 and No. 4 are located on the right side of the car 10 respectively. Tire 11 position of front wheel, left front wheel, right rear wheel and left rear wheel.

In addition to the aforementioned third preferred embodiment and another preferred embodiment of the present invention, the position of the wireless receiving device 30 is set close to the position of the tire 11 of the right front wheel, in other preferred embodiments, it is also possible to The wireless receiving device 30 is set close to the other tires 11. At this time, as long as the trend of the packet arrival rate is larger, it means that the distance to the wireless receiving device 30 is closer. The rate estimates the distance from the wireless receiving device 30 , and locates the wireless tire pressure sensor 20 of each serial number at the position of the tire 11 of the automobile 10 . It can be seen from the foregoing description that the wireless tire pressure sensor positioning method according to the third preferred embodiment of the present invention and another preferred embodiment of the present invention can be used to locate the wireless tire pressure sensors 20 of each number at the position of the tire 11 of the car 10, and there is no limit to it. The wireless receiving device 30 is a smart phone, a tablet or a wearable device, and the location where the wireless receiving device 30 is installed is not limited, for example, in the glove box of the passenger seat, near 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 correctness of the positioning positions of the wireless tire pressure sensors 20 of each number in the first preferred embodiment.

In addition to the aforementioned third preferred embodiment, the present invention can be applied to various types of motor vehicles with two or more wheels in addition to the motor vehicle of the automobile 10 . Please refer to the fourth preferred embodiment shown in FIG. 7 . For example, the present invention can also be applied to a motor vehicle of the locomotive 10A. The method steps of the fourth preferred embodiment of the present invention are substantially the same as those of the third preferred embodiment, the difference is that the two wireless tire pressure sensors 20 are respectively installed on the front wheel and the rear wheel of the locomotive 10A, and one of the wireless tire pressure sensors 20 is installed nearer to one of them. At the tire 11 of the wireless tire pressure sensor 20, in this preferred embodiment, the tire 11 that is closer to the front wheel is selected, and a wireless receiving device 30 is installed.

In the fourth preferred embodiment of the present invention, the locating method for locating which tire 11 of the locomotive 10A each wireless tire pressure sensor 20 is located on is the same as the aforementioned third preferred embodiment, and is based on the strength of the wireless signal received by the wireless receiving device 30 The wireless tire pressure sensors 20 of the front and rear wheels are assigned numbers 1 and 2 in descending order, and when the wireless receiving device 30 transmits the positioning command broadcast operation, the wireless tires with numbers 1-2 are requested. The pressure sensor 20 transmits a plurality of packets to the wireless receiving device 30 at each power level in a variable power level manner in which the power is increased by one order each time.

Finally, according to the relationship between the wireless signal reception strength (RSSI) of each wireless tire pressure sensor 20 and the packet arrival rate (Packet Delivery Ratio; PDR), the numerical trend of the packet arrival rate of the wireless tire pressure sensors 20 numbered 1-2 is obtained as follows: From the results from large to small, it is calculated from the results that the wireless tire pressure sensor 20 of No. 1 is the closest to the wireless receiving device 30, and the wireless tire pressure sensor 20 of No. 2 is farther from the wireless receiving device 30. Using two wireless tire pressures The relative relationship between the distance between the sensor 20 and the wireless receiving device 30 is that the wireless tire pressure sensors 20 with positioning numbers 1 and 2 are located at the tires 11 of the front and rear wheels of the locomotive 10A, respectively.

When the fourth preferred embodiment establishes the relationship between the wireless signal received strength (RSSI) and the packet arrival rate (Packet Delivery Ratio; PDR), the technical method of the aforementioned other preferred embodiment can also be used and transferred to the first preferred embodiment. In the fourth preferred embodiment, the wireless receiving device 30 transmits packets to the wireless tire pressure sensors 20 numbered 1 and 2 in a power-variable manner, and the wireless tire pressure sensors of each number transmit the reception results back to the wireless receiving device. The device 30 collects and establishes the relationship between the wireless signal reception strength (RSSI) and the packet arrival rate (Packet Delivery Ratio; PDR), so as to determine the relationship between the two wireless tire pressure sensors 20 and the corresponding packet delivery ratio (PDR). The relative relationship between the distances of the wireless receiving devices 30 is that the wireless tire pressure sensors 20 with the positioning numbers 1 and 2 are located at the tires 11 of the front and rear wheels of the locomotive 10A, respectively.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the scope of rights claimed by the present invention. All other equivalent changes or modifications that do not depart from the spirit disclosed in the present invention shall be included in the present invention. within the scope of the patent application.

10: Cars

11: Tires

20: Wireless tire pressure sensor

30: Wireless receiving device

Claims (34)

A method for locating a wireless tire pressure sensor of a motor vehicle. The pair of wireless tire pressure sensors can communicate with each other; each wireless tire pressure sensor transmits a wireless signal to the wireless receiving device, and the wireless receiving device gives different marks according to the strength of the wireless signal transmitted by each wireless tire pressure sensor and is located in the motor vehicle. Which tire is located; each marked wireless tire pressure sensor reads the wireless signal strength of other marked wireless tire pressure sensors, and establishes the wireless signal strength relationship between any pair of wireless tire pressure sensors. The wireless signal strength relationship verifies whether the positioning position of each wireless tire pressure sensor is correct. The method for locating a wireless tire pressure sensor of a motor vehicle as claimed in claim 1, wherein the wireless receiving device searches for each wireless tire pressure sensor around, identifies the identity of each wireless tire pressure sensor, and enables each wireless tire pressure sensor to transmit wireless signals to it; The wireless receiving device sequentially requests the wireless tire pressure sensors of each mark to act, so that the wireless tire pressure sensors of each mark read the wireless signal strengths of the wireless tire pressure sensors of other marks respectively. The method for locating a wireless tire pressure sensor of a motor vehicle as claimed in claim 1, wherein when the motor vehicle starts, the gravity sensor of each wireless tire pressure sensor detects movement, so that each wireless tire pressure sensor follows the The setting of the internal program transmits a wireless signal to the wireless receiving device, and according to the setting of the internal program, the wireless signal strength of the other marked wireless tire pressure sensors is read respectively. The wireless tire pressure sensor positioning method for a motor vehicle as claimed in any one of claims 1 to 3, wherein the motor vehicle has four of the tires, the marks are numbers, and the wireless receiving device is located in the motor vehicle the front half of the tire and transmit wireless signals to it according to the wireless tire pressure sensors Number 1, number 2, number 3 and number 4 are given from strong to weak, where the wireless tire pressure sensor number 1 is the closest to the wireless receiving device; when the wireless signal strength of the wireless tire pressure sensor number 2 and number 1 is approximately equal to The wireless signal strength of the wireless tire pressure sensors No. 3 and No. 4, that is, confirm that the wireless tire pressure sensors No. 2 and No. 1 are located on the two front wheels, and the wireless tire pressure sensors No. 3 and No. 4 are located on the two rear wheels, and then compare No. 1 , 3 and the wireless signal strength between the wireless tire pressure sensors No. 1 and 4, or compare the wireless signal strength between the wireless tire pressure sensors No. 2, 3 and No. 2 and 4, and confirm the wireless signal strength between No. 3 and No. 4 Which of the tire pressure sensors is located on the same side of the motor vehicle as the wireless receiving device, verify whether the positioning position of each wireless tire pressure sensor is correct. The wireless tire pressure sensor positioning method for a motor vehicle as claimed in any one of claims 1 to 3, wherein the motor vehicle has four of the tires, the marks are numbers, and the wireless receiving device is located in the motor vehicle Number 1, number 2, number 3 and number 4 are given to the rear half of the wireless tire pressure sensor according to the strength of the wireless signal transmitted to it by the wireless tire pressure sensors, wherein the wireless tire pressure sensor number 1 is the closest to the wireless receiving device. ; When the wireless signal strength of the wireless tire pressure sensors No. 2 and No. 1 is approximately equal to the wireless signal strength of the wireless tire pressure sensors No. 3 and No. 4, it is confirmed that the wireless tire pressure sensors No. 2 and No. 1 are located in the two rear wheels. The wireless tire pressure sensors No. 3 and No. 4 are located on the two front wheels, and then compare the wireless signal strength between the wireless tire pressure sensors No. 1, 3 and No. 1, 4, or compare the wireless tire pressure sensors No. 2, 3 and No. 2, 4. The wireless signal strength between the tire pressure sensors, confirm which of the wireless tire pressure sensors No. 3 and No. 4 and the wireless receiving device are located on the same side of the motor vehicle, and verify whether the positioning position of each wireless tire pressure sensor is correct. The method for locating a wireless tire pressure sensor of a motor vehicle according to claim 2, wherein the wireless receiving device searches for the wireless tire pressure sensors in the surrounding area, and identifies the identities of the wireless tire pressure sensors Then, one byte of the unique identification code of each wireless tire pressure sensor is locked, and the wireless receiving device only communicates with the wireless tire pressure sensor with the same byte of unique identification code thereafter. The wireless tire pressure sensor positioning method for a motor vehicle according to any one of claims 1 to 3, wherein the wireless receiving device is a Bluetooth tire pressure receiver, and each wireless tire pressure sensor is a Bluetooth tire pressure sensor . The method for locating a wireless tire pressure sensor of a motor vehicle according to any one of claims 1 to 3, wherein the wireless tire pressure sensor of each mark transmits wireless signals to the wireless receiving device in a manner of changing at least a plurality of power levels signal, and send multiple packets at each power level; the wireless receiving device uses the trend of the packet arrival rate of each marked wireless tire pressure sensor at each power level. When the packet arrival rate trend is larger, the distance is closer. Calculate the distance between the wireless receiving device and each marked wireless tire pressure sensor, and verify again whether the positioning position of each wireless tire pressure sensor is correct. The method for locating a wireless tire pressure sensor of a motor vehicle according to claim 4, wherein the wireless tire pressure sensors of each number transmit wireless signals to the wireless receiving device in a manner of changing at least a plurality of power levels, and each The power level sends multiple packets; the wireless receiving device uses the size trend of the packet arrival rate of the wireless tire pressure sensor of each number at each power level. When the packet arrival rate trend is larger, the distance is closer. Check the distance of the wireless tire pressure sensors of each number, and verify again whether the positioning position of each wireless tire pressure sensor is correct. The method for locating a wireless tire pressure sensor of a motor vehicle according to claim 5, wherein the wireless tire pressure sensors of each number transmit wireless signals to the wireless receiving device in a manner of changing at least a plurality of power levels, and each number of The power level sends multiple packets; the wireless receiving device uses the size trend of the packet arrival rate of the wireless tire pressure sensor of each number at each power level. When the packet arrival rate trend is larger, the distance is closer. Check the distance of the wireless tire pressure sensors of each number, and verify again whether the positioning position of each wireless tire pressure sensor is correct. The method for locating a wireless tire pressure sensor of a motor vehicle according to claim 4, wherein the motor vehicle is provided with a glove box, and the wireless receiving device is located in the glove box. The method for locating a wireless tire pressure sensor of a motor vehicle as claimed in claim 4, wherein the motor vehicle is provided with a steering wheel, and the wireless receiving device is located around the steering wheel. A method for locating a wireless tire pressure sensor of a motor vehicle. The sensor transmits a wireless signal to the wireless receiving device, and the wireless receiving device gives different marks according to the strength of the wireless signal transmitted to it by each wireless tire pressure sensor; the wireless tire pressure sensor of each mark sends the wireless tire pressure sensor to the wireless tire in a manner of at least changing a plurality of power levels. The receiving device transmits wireless signals, and sends multiple packets at each power level. The wireless receiving device uses the size trend of the packet arrival rate of each marked wireless tire pressure sensor at each power level. When the packet arrival rate trend is larger, it means The closer the distance is, the distance between the wireless receiving device and each marked wireless tire pressure sensor is calculated, and each wireless tire pressure sensor is positioned on the tire position of the motor vehicle. The method for locating a wireless tire pressure sensor of a motor vehicle according to claim 13, wherein the wireless receiving device searches for each wireless tire pressure sensor around, identifies the identity of each wireless tire pressure sensor, and causes each wireless tire pressure sensor to transmit wireless signals to it; The wireless receiving device requires the wireless tire pressure sensor of each label to transmit a wireless signal to the wireless tire pressure sensor in a manner of varying at least a plurality of power levels. The method for locating a wireless tire pressure sensor of a motor vehicle as claimed in claim 13, wherein when the motor vehicle is driven, the gravity sensor of each wireless tire pressure sensor detects movement, so that each wireless tire pressure sensor is moved according to the The setting of the internal program transmits a wireless signal to the wireless receiving device, and according to the setting of the internal program, the wireless signal is transmitted to the wireless receiving device in a manner of changing at least a plurality of power levels. The wireless tire pressure sensor positioning method for a motor vehicle according to any one of claims 13 to 15, wherein the motor vehicle has two of the tires and is divided into a front wheel and a rear wheel, the marks are numbers, the The wireless receiving device is located in the front half of the motor vehicle and is assigned numbers 1 and 2 according to the strength of the wireless signals transmitted to it by the wireless tire pressure sensors. The size and trend of the packet arrival rate is greater than that of No. 2, that is, the wireless tire pressure sensor of No. 1 is located in the front wheel, and the wireless tire pressure sensor of No. 2 is located in the rear wheel. The wireless tire pressure sensor positioning method for a motor vehicle according to any one of claims 13 to 15, wherein the motor vehicle has two of the tires and is divided into a front wheel and a rear wheel, the marks are numbers, the The wireless receiving device is located in the rear half of the motor vehicle and is assigned numbers 1 and 2 according to the strength of the wireless signals transmitted to it by the wireless tire pressure sensors. The size and trend of the packet arrival rate is greater than that of No. 2, that is, the wireless tire pressure sensor of No. 1 is located in the rear wheel, and the wireless tire pressure sensor of No. 2 is located in the front wheel. The wireless tire pressure sensor positioning method for a motor vehicle as claimed in any one of claims 13 to 15, wherein the motor vehicle has four of the tires, each of the marks is a number, and the wireless receiving device is based on each of the tires. Numbers 1, 2, 3, and 4 are assigned to the wireless tire pressure sensor from strong to weak for the strength of the wireless signal transmitted by the wireless tire pressure sensor. The size trend of the packet arrival rate is from large to small, that is, the wireless tire pressure sensors of No. 1, No. 2, No. 3 and No. 4 are located in the tires whose distance from the wireless receiving device is from near to far. The method for locating a wireless tire pressure sensor of a motor vehicle according to claim 14, wherein the wireless receiving device searches for the wireless tire pressure sensors in the surrounding area, and after identifying the identity of each wireless tire pressure sensor, locks the wireless tire pressure sensor. One byte of the unique identification code, the wireless receiving device only communicates with the wireless tire pressure sensor with the same byte of the unique identification code. The wireless tire pressure sensor positioning method for a motor vehicle according to claim 19, wherein the wireless receiving device is a Bluetooth tire pressure receiver, and each wireless tire pressure sensor is a Bluetooth tire pressure sensor. A wireless tire pressure sensor positioning system for a motor vehicle, comprising: a motor vehicle, including at least two or more tires, a wireless tire pressure sensor is installed on each tire, and a wireless receiver is installed at a position where the motor vehicle is relatively close to one of the tires Any pair of wireless tire pressure sensors can communicate with each other; each wireless tire pressure sensor transmits a wireless signal to the wireless receiving device, and the wireless receiving device gives different values according to the strength of the wireless signal transmitted by each wireless tire pressure sensor to it. mark and where to locate the tire on which the motor vehicle is located. The wireless tire pressure sensor positioning system for a motor vehicle according to claim 21, wherein each marked wireless tire pressure sensor reads the wireless signal strengths of other marked wireless tire pressure sensors respectively, and establishes any paired wireless tire pressure sensor. The wireless signal strength relationship between tire pressure sensors is used to verify whether the positioning position of each wireless tire pressure sensor is correct. The wireless tire pressure sensor positioning system for a motor vehicle as claimed in claim 22, wherein the wireless receiving device searches for each wireless tire pressure sensor around, identifies the identity of each wireless tire pressure sensor, and enables each wireless tire pressure sensor to transmit wireless signals to it; The wireless receiving device sequentially requests the wireless tire pressure sensors of each mark to act, so that the wireless tire pressure sensors of each mark read the wireless signal strengths of the wireless tire pressure sensors of other marks respectively. The wireless tire pressure sensor positioning system for a motor vehicle as claimed in claim 22, wherein when the motor vehicle is driven, the gravity sensors of each wireless tire pressure sensor detect movement, so that the wireless tire pressure sensors follow the The setting of the internal program transmits a wireless signal to the wireless receiving device, and according to the setting of the internal program, the wireless signal strength of the other marked wireless tire pressure sensors is read respectively. The wireless tire pressure sensor positioning system for a motor vehicle according to claim 23, wherein the wireless receiving device searches for the wireless tire pressure sensors in the surrounding area, and after identifying the identity of the wireless tire pressure sensors, locks the wireless tire pressure sensors. One byte of the unique identification code, the wireless receiving device only communicates with the wireless tire pressure sensor with the same byte of the unique identification code. The wireless tire pressure sensor positioning system for a motor vehicle according to any one of claims 21 to 25, wherein the wireless tire pressure sensor of each mark transmits wireless signals to the wireless receiving device in a manner of changing at least a plurality of power levels signal, and send multiple packets at each power level; the wireless receiving device uses the trend of the packet arrival rate of each marked wireless tire pressure sensor at each power level. When the packet arrival rate trend is larger, the distance is closer. Calculate the distance between the wireless receiving device and each marked wireless tire pressure sensor, and verify again whether the positioning position of each wireless tire pressure sensor is correct. A wireless tire pressure sensor positioning system for a motor vehicle, comprising: a motor vehicle, including at least two or more tires, a wireless tire pressure sensor is installed on each tire, and a wireless receiver is installed at a position where the motor vehicle is relatively close to one of the tires device; each wireless tire pressure sensor transmits a wireless signal to the wireless receiving device, and the wireless receiving device gives different marks according to the strength of the wireless signal transmitted to it by each wireless tire pressure sensor; the wireless tire pressure sensor of each mark changes at least a plurality of powers The wireless receiving device transmits wireless signals to the wireless receiving device in a hierarchical manner, and sends multiple packets at each power level. The larger the rate trend is, the closer the distance is. The distance between the wireless receiving device and each marked wireless tire pressure sensor is estimated, and each wireless tire pressure sensor is located on the tire position of the motor vehicle. The wireless tire pressure sensor positioning system for a motor vehicle as claimed in claim 27, wherein the wireless receiving device searches for each wireless tire pressure sensor around, identifies the identity of each wireless tire pressure sensor and makes Each wireless tire pressure sensor transmits a wireless signal to it; the wireless receiving device requires each marked wireless tire pressure sensor to transmit a wireless signal to the wireless tire pressure sensor in a manner of changing at least a plurality of power levels. The wireless tire pressure sensor positioning system for a motor vehicle as claimed in claim 27, wherein when the motor vehicle is driven, the gravity sensor of each wireless tire pressure sensor detects movement, so that each wireless tire pressure sensor follows the The setting of the internal program transmits a wireless signal to the wireless receiving device, and according to the setting of the internal program, the wireless signal is transmitted to the wireless receiving device in a manner of changing at least a plurality of power levels. The wireless tire pressure sensor positioning system for a motor vehicle as claimed in claim 28, wherein the wireless receiving device searches the surrounding wireless tire pressure sensors, and after identifying the identities of the wireless tire pressure sensors, locks the wireless tire pressure sensors. One byte of the unique identification code, the wireless receiving device only communicates with the wireless tire pressure sensor with the same byte of the unique identification code. A method for locating a wireless tire pressure sensor of a motor vehicle. The sensor transmits a wireless signal to the wireless receiving device, and the wireless receiving device gives different marks according to the strength of the wireless signal transmitted by each wireless tire pressure sensor; the wireless receiving device transmits at least a plurality of power levels to each marked wireless tire The pressure sensor transmits wireless signals, and sends multiple packets at each power level. Each wireless tire pressure sensor sends the received result back to the wireless receiving device for collection, and uses the marked wireless tire pressure sensor to receive the packets at each power level. The size trend of the arrival rate, when the trend of the packet arrival rate is larger, the closer the distance is. Calculate the distance between each marked wireless tire pressure sensor and the wireless receiving device, and locate each wireless tire pressure sensor on the tire position of the motor vehicle. The method for locating a wireless tire pressure sensor for a motor vehicle as claimed in claim 31, wherein the motor vehicle has two of the tires and is divided into front wheels and rear wheels, the marks are numbers, and the wireless receiving device is located in the motor vehicle The front half of the vehicle is assigned numbers 1 and 2 according to the strength of the wireless signals transmitted to it by the wireless tire pressure sensors. Both are greater than No. 2, that is, the wireless tire pressure sensor with No. 1 is located on the front wheel, and the wireless tire pressure sensor with No. 2 is located on the rear wheel. The method for locating a wireless tire pressure sensor for a motor vehicle as claimed in claim 31, wherein the motor vehicle has two of the tires and is divided into front wheels and rear wheels, the marks are numbers, and the wireless receiving device is located in the motor vehicle The rear half of the vehicle is assigned numbers 1 and 2 according to the strength of the wireless signals transmitted to it by the wireless tire pressure sensors. Both are greater than No. 2, that is, the wireless tire pressure sensor with No. 1 is located on the rear wheel, and the wireless tire pressure sensor with No. 2 is located on the front wheel. The method for locating a wireless tire pressure sensor of a motor vehicle as claimed in claim 31, wherein the motor vehicle has four of the tires, each of the marks is a serial number, and the wireless receiving device sends to the tire according to each of the wireless tire pressure sensors. The strength of the transmitted wireless signal is given to No. 1, No. 2, No. 3 and No. 4 from strong to weak. When the wireless tire pressure sensors No. 1, No. 2, No. 3 and No. 4 have the trend of the packet arrival rate at each power level From large to small, that is, locate the tires whose distances from the wireless tire pressure sensors of No. 1, No. 2, No. 3 and No. 4 are respectively located from near to far from the wireless receiving device.

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