CN114683779A - Wireless tire pressure sensor positioning method and system for motor vehicle - Google Patents

Abstract

A method for positioning wireless tyre pressure sensor of motor vehicle includes installing wireless tyre pressure sensors on each tyre of motor vehicle, setting a wireless receiving unit near one tyre, giving different numbers to each wireless tyre pressure sensor and its position on the motor vehicle by the strength of wireless signals transmitted by each wireless tyre pressure sensor, reading the wireless signal strength of other numbered wireless tyre pressure sensors by each numbered wireless tyre pressure sensor, and setting up wireless signal strength relation between any two paired wireless tyre pressure sensors to verify whether the position is correct. The invention can position each wireless tire pressure sensor after all the wireless tire pressure sensors are installed on the motor vehicle, thereby saving the operation and time for inputting the position to the wireless receiving device by each wireless tire pressure sensor.

Description

Wireless tire pressure sensor positioning method and system for motor vehicles

technical field

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.

Background technique

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. 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 on the motor vehicle separately Previously, it was necessary to pair and input the required wireless tire pressure sensors with the wireless receiving device one by one, so it took more time to set.

SUMMARY OF THE INVENTION

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 object, the present invention provides a method for locating a wireless tire pressure sensor of a motor vehicle, the steps of which include:

A wireless tire pressure sensor is respectively installed on each tire of a motor vehicle, and a wireless receiving device is installed at a position where the motor vehicle is relatively close to one of the tires, so that any two pairs 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 numbers or marks according to the strength of the wireless signal transmitted by each wireless tire pressure sensor and the positioning position of which tire of the motor vehicle is located;

Each numbered or marked wireless tire pressure sensor reads the wireless signal strength of other numbered or marked wireless tire pressure sensors respectively, and establishes the wireless signal strength relationship between any pair of wireless tire pressure sensors. relationship 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 numbered or marked wireless tire pressure sensors according to the internal program settings.

Further, according to the present invention, after the wireless receiving device searches for the wireless tire pressure sensors in the surroundings, after identifying the identity of each wireless tire pressure sensor, one byte of the unique identifier of each wireless tire pressure sensor is locked. It then communicates only with wireless tire pressure sensors that have the same byte of unique identifier.

Furthermore, the wireless tire pressure sensor with each number or mark of the present invention 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; 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 object, the present invention also provides a method for locating a wireless tire pressure sensor of a motor vehicle, the steps of which include:

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

Each wireless tire pressure sensor transmits a wireless signal 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;

Each numbered wireless tire pressure sensor transmits wireless signals to the wireless receiving device in a manner of at least varying a plurality of power levels, and sends multiple packets at each power level, and the wireless receiving device uses each numbered or marked wireless tire pressure sensor to transmit wireless signals to the wireless receiving device. 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 distance between the wireless receiving device and the wireless tire pressure sensor of each number, and locate each wireless tire pressure sensor in the The location of the tires 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 wireless signals thereto in a manner of varying at least a plurality of power levels.

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 according to the internal program setting, the wireless signal is transmitted to the wireless receiving device in a manner of changing at least a plurality of power levels.

In order to achieve the above object, the present invention provides a wireless tire pressure sensor positioning system of a motor vehicle, comprising:

A motor vehicle includes at least two or more tires, a wireless tire pressure sensor is installed on each tire, and a wireless receiving device is installed near one of the tires of the motor vehicle. Any two pairs of wireless tire pressure sensors are mutually able to communicate with each other;

Each wireless tire pressure sensor transmits a wireless signal to the wireless receiving device, and the wireless receiving device assigns different numbers or marks according to the strength of the wireless signal transmitted by each wireless tire pressure sensor and the positioning position 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 object, the present invention provides a wireless tire pressure sensor positioning system of a motor vehicle, comprising:

A motor vehicle, comprising at least two or more tires, a wireless tire pressure sensor is respectively installed on each tire, and a wireless receiving device is installed at a position where the motor vehicle is relatively close to one of the tires;

Each wireless tire pressure sensor transmits a wireless signal 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;

Each numbered or 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 numbered or marked wireless tire pressure sensor to transmit wireless signals to the wireless receiving device. The size trend of the packet arrival rate of the pressure sensor at each power level. The larger the packet arrival rate trend is, the closer the distance is. Calculate the distance between the wireless receiving device and the wireless tire pressure sensor of each number or mark, and locate each wireless tire. The pressure sensor is located at the tire position of the motor vehicle.

Through the aforementioned positioning method and the system applied to the motor vehicle, the present invention can use the wireless receiving device to search for the communication of the surrounding wireless tire pressure sensors after all the wireless tire pressure sensors are respectively installed on the tires of the motor vehicle, and confirm each wireless tire pressure sensor. Where the wireless tire pressure sensor is 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.

Description of drawings

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.

FIG. 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.

Symbol Description:

10 Car 10A Motorcycle

11 Tires 20 Wireless tire pressure sensor

30 Wireless receiver

Detailed ways

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 of the automobile 10 respectively. , the four tires 11 of the left front wheel, the right rear wheel, and the left rear wheel, thereby being applied to a car 10 having four tires 11 to constitute a positioning system. In this preferred embodiment, the unique identifiers 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 0E: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 pressure sensors 20 , in the place closer to one of the tires 11 on which the wireless tire pressure sensor 20 is installed, in this preferred embodiment, a wireless receiving device 30 is installed at the tire 11 closer to the right front wheel; the aforementioned wireless tire pressure sensors 20 It is a Bluetooth tire pressure sensor with data interactive communication function. Any pair of wireless tire pressure sensors 20, that is, each wireless tire pressure sensor 20 and the other three wireless tire pressure sensors 20 can be matched with each other in pairs. To communicate with each other, the aforementioned wireless receiving device 30 is a Bluetooth tire pressure receiver with a data interactive communication function. The Bluetooth tire pressure receiver may be a tire pressure detector host with a display, or it may be a tire pressure detection receiver that executes Bluetooth. A software-based smartphone, tablet, audio-visual entertainment system or wearable device with Bluetooth function on the car, such as a smart watch; the positioning method for locating which tire 11 of the car 10 each wireless tire pressure sensor 20 is located on 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 identifier of the pressure sensor 20, in this preferred embodiment, is the first byte "OE" of each unique identifier is locked, after which the wireless receiving device 30 communicates only with the wireless tire pressure sensor 20 having the same byte at the same location as the unique identifier.

After searching the surrounding wireless tire pressure sensors 20, the wireless receiving device 30 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 motorcycle; 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, giving the wireless tire pressure of the right front wheel The number 1 of the sensor 20 is then sequentially assigned to the other wireless tire pressure sensors 20 with numbers 2, 3 and 4 in descending order according to the 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 with preset numbers 2, 3 and 4 are respectively located on the left front wheel, the right rear wheel and the left rear wheel of the car 10. The positioning position of the wheel, 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):

number 1 number 2 number 3 number 4 number 0 RSSI₀₁ RSSI₀₂ RSSI₀₃ RSSI₀₄

Table 1. The wireless signal strength table received by the wireless receiving device

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:

Table 2. Wireless signal strength table read by each numbered device

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. The read wireless signal strength RSSI 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 of No. 2 and No. 1 is approximately equal to that of No. 3 and No. 4 The wireless signal strength between the wireless tire pressure sensors 20 confirms 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.

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 , that is, comparing 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 of the right front wheel No. 1 When the pressure sensor 20 is used as the 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 numbered 1 and 3 and the wireless tire pressure sensors 20 numbered 1 and 4, and confirm that The distance between the wireless tire pressure sensor 20 of No. 3 and the wireless tire pressure sensor 20 of No. 1 is closer, so the wireless signal strength is higher); if the above two formulas are consistent, it can be confirmed that the positioning position of each wireless tire pressure sensor 20 is correct.

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 strengths 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 component 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, Each wireless tire pressure sensor 20 transmits wireless signals to the wireless receiving device 30 according to the internal program setting, and each wireless tire pressure sensor 20 reads the wireless signals of other wireless tire pressure sensors 20 according to the internal program setting. Then the wireless tire pressure sensor 20 of each number transmits the read wireless signal strength to the wireless receiving device 30, and then performs a comparison and judgment to confirm the correct positioning position and the method described in the first preferred embodiment. same.

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 near the tire 11 of the right front wheel, in other preferred embodiments, the wireless receiving device 30 can also be set At the position of the tire 11 near the left front wheel, which is also located in the front half of the car 10, as shown in FIG. 4, the wireless receiving device 30 is arranged around the steering wheel or the head-up display. The number 1 of the sensor 20, then according to the decreasing intensity of the wireless signal received by the wireless receiving device 30, the numbers 2, 3 and 4 of the wireless tire pressure sensors 20 are sequentially assigned to the right front wheel and the left rear wheel of the car 10 respectively. and the positioning position of the right rear wheel; in this preferred embodiment, the way to confirm that the positioning positions of the wireless tire pressure sensors 20 numbered 1 to 4 are correct is the same as in the first preferred embodiment described above; and the same in Table 2 When comparing the wireless signal strength table listed in the method, 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 .

In addition to the first 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, the wireless receiving device 30 can also be modified It is set at the position of the tire 11 of the rear half of the car 10 close to the right rear wheel. At this time, the number 1 is assigned to the wireless tire pressure sensor 20 of the right rear wheel, and then according to the intensity of the wireless signal received by the wireless receiving device 30, it is sequentially assigned. The numbers 2, 3 and 4 of each wireless tire pressure sensor 20 are respectively located at the positioning positions of the left rear wheel, the right front wheel and the left front wheel of the automobile 10; The correct way of positioning the tire pressure sensor 20 is the same as that of the first preferred embodiment; and when comparing the wireless signal strength tables listed in Table 2 in the same way, the wireless signal strengths received by the wireless receiving devices of each number are compared. It conforms to the following formula: RSSI _12/21 ≈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 near the tire 11 of the right front wheel, in other preferred embodiments, the wireless receiving device 30 can also be set The rear half of the car 10 is close to the tire 11 of the left rear wheel, at this time, the wireless tire pressure sensor 20 of the left rear wheel is given the serial number of No. 1, and then according to the intensity of the wireless signal received by the wireless receiving device 30, it is sequentially given to each wireless tire. The numbers of the tire pressure sensors 20 No. 2, No. 3 and No. 4 are respectively located at the positioning positions of the right rear wheel, the left front wheel and the right front wheel of the automobile 10; in this preferred embodiment, confirm the wireless tire pressure of Nos. 1 to 4 The correct way of positioning the sensor 20 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 the wireless receiving devices of each number meet the following requirements: Formula: RSSI _12/21 ≈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), it is determined that the stronger signal is No. 4-1 (located directly behind the wireless tire pressure sensor 20 of No. 2) and the weak one is the wireless tire pressure sensor 20 of No. 4-2, thereby locating six The position of the wireless tire pressure sensor 20 of each number on the tire 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 and the left front wheel of the automobile 10 wheel, right rear wheel and four tires 11 of the left rear wheel, thereby being applied to the automobile 10 with four tires 11 to constitute a positioning system; each wireless tire pressure sensor 20 also has the unique identifier described, in the closer A wireless tire pressure sensor 20 is installed at the tire 11, as in this preferred embodiment, a wireless receiving device 30 is installed at the tire 11 closer to the right front wheel; each wireless tire pressure sensor 20 is a Bluetooth tire pressure sensor, The wireless receiving 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 identifier 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 identifier 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:

number 1 number 2 number 3 number 4 number 0 RSSI₀₁ RSSI₀₂ RSSI₀₂ RSSI₀₂

Table 3. The wireless signal strength table received by the wireless receiving device

The wireless receiving device 30 transmits the broadcasting action of the 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 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:

number 1 number 2 number 3 number 4 Power Tier 0 RSSI₀₁ RSSI₀₂ RSSI₀₃ RSSI₀₄ Power Tier 1 RSSI₁₁ RSSI₁₂ RSSI₁₃ RSSI₁₄ Power Tier 2 RSSI₂₁ RSSI₂₂ RSSI₂₃ RSSI₂₄ Power Tier 3 RSSI₃₁ RSSI₃₂ RSSI₃₃ RSSI₃₄

Table 4. The wireless signal strength table received by the wireless receiving device

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:

Table 5. Packet arrival rate table received by wireless receiving device

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 No. 2 is close to 20 times, and the other wireless tire pressure sensors 20 are analogous, and the wireless tire pressure sensors 20 No. 1, No. 2, No. 3 and No. 4 are located in the right front of the car 10 respectively. Wheel, left front wheel, right rear wheel and tire 11 position of left rear wheel.

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 uses the wireless receiving device 30 to transmit 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 component for positioning, but is set so that when the car 10 starts, the gravity sensor of each wireless tire pressure sensor 20 When movement is detected, each wireless tire pressure sensor 20 actively searches for the wireless receiving device 30 according to the setting of the internal program and transmits a 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 performs the broadcasting action of the positioning command according to the setting of the internal program, according to the setting number 1-4 of each wireless tire pressure sensor 20. In a variable power hierarchy method in which the power is increased by one order each time, a plurality of packets are respectively transmitted to the wireless receiving device 30 at each power level, and the positioning determination of the subsequent wireless tire pressure sensors 20 of each number is the same as the aforementioned third preferred embodiment. The same method described in .

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 packet is 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 for collection and establishment According to the table, the positioning determination of the wireless tire pressure sensor 20 of each 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 another implementation In the example, 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 is proportional to the requirement of accuracy) for each wireless tire pressure sensor 20 to receive.

Then, the wireless tire pressure sensors 20 of each number send back the wireless signal strength and packet arrival rate received at each power level to the wireless receiving device 30, and the wireless receiving device 30 collects and establishes the wireless tire pressure sensor 20 of each number to receive The wireless signal strength table of the wireless receiving device 30 is shown in Table 6:

number 1 number 2 number 3 number 4 Power Tier 0 RSSI₀₁ RSSI₀₂ RSSI₀₃ RSSI₀₄ Power Tier 1 RSSI₁₁ RSSI₁₂ RSSI₁₃ RSSI₁₄ Power Tier 2 RSSI₂₁ RSSI₂₂ RSSI₂₃ RSSI₂₄ Power Tier 3 RSSI₃₁ RSSI₃₂ RSSI₃₃ RSSI₃₄

Table 6. Wireless signal strength table compiled by wireless receiving devices

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:

number 1 number 2 number 3 number 4 Power Tier 0 PDR₀₁ PDR₀₂ PDR₀₃ PDR₀₄ Power Tier 1 PDR₁₁ PDR₁₂ PDR₁₃ PDR₁₄ Power Tier 2 PDR₂₁ PDR₂₂ PDR₂₃ PDR₂₄ Power Tier 3 PDR₃₁ PDR₃₂ PDR₃₃ PDR₃₄

Table 7. The packet arrival rate table established by the wireless receiving device

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 received transactions 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 packet arrival rates of the wireless tire pressure sensors 20 numbered 1-4 are The numerical trend is from large to small. Since 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. Among them, the wireless tire pressure sensor numbered 1 20 most recently, the wireless tire pressure sensor number 2 is 20 times closer, and the rest of the wireless tire pressure sensors 20 numbered and so on, and the wireless tire pressure sensors 20 of the positioning number 1, number 2, number 3 and number 4 are located in the car 10 respectively. The tire 11 positions of the right front wheel, the left front wheel, the right rear wheel and the 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, also The wireless receiving device 30 can be 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 from the wireless receiving device 30 is closer. The arrival 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 above-mentioned third preferred embodiment, the present invention is applied to the motor vehicle of the automobile 10 and can also be applied to various types of motor vehicles with two or more wheels. Please refer to the fourth preferred embodiment shown in FIG. 7 , The present invention can also be applied to the motor vehicle of the 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, the difference is that the two wireless tire pressure sensors 20 are respectively installed on the front wheel and the rear wheel of the motorcycle 10A. A wireless receiving device 30 is installed at the tire 11 where the wireless tire pressure sensor 20 is installed, in this preferred embodiment, the tire 11 that is closer to the front wheel is selected.

In the fourth preferred embodiment of the present invention, the method for locating which tire 11 of the motorcycle 10A each wireless tire pressure sensor 20 is located is the same as that in the aforementioned third preferred embodiment, and is based on the wireless receiving device 30 receiving wireless signals The strengths are arranged in descending order, and the numbers 1 and 2 are assigned to the wireless tire pressure sensors 20 of the front and rear wheels, and when the wireless receiving device 30 transmits the broadcast operation of the positioning command, each of the numbers 1-2 is required. The wireless tire 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, from the relationship between the wireless signal received 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 by 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. Two wireless tire pressure sensors are used. The relative relationship between the distance between 20 and the wireless receiving device 30 is that the wireless tire pressure sensors 20 with positioning numbers 1 and 2 are located on the tires 11 of the front and rear wheels of the motorcycle 10A, respectively.

When the fourth preferred embodiment establishes the relationship between the wireless signal received strength (RSSI) and the packet arrival rate (PacketDelivery Ratio; PDR), the technical method of the other preferred embodiment can also be used and transferred to the fourth preferred embodiment. In a preferred embodiment, the wireless receiving device 30 transmits packets to the wireless tire pressure sensors 20 of No. 1 and No. 2 in a power-variable manner, and the wireless tire pressure sensors of each serial number will then transmit the reception results back to the wireless receiving device. 30 Collectively establish the relationship between the wireless signal reception strength (RSSI) and the packet arrival rate (Packet Delivery Ratio; PDR), according to which the relative relationship between the distances between the two wireless tire pressure sensors 20 and the wireless receiving device 30 is determined, and the positioning number 1, number The wireless tire pressure sensors 20 of 2 are located at the positions of the tires 11 of the front wheel and the rear wheel of the motorcycle 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 claims.

Claims (34)

1. A method of wireless tire pressure sensor location for a motor vehicle, comprising the steps of:

the method comprises the following steps that each tire of a motor vehicle is respectively provided with a wireless tire pressure sensor, a wireless receiving device is arranged at a position where the motor vehicle is relatively close to one of the tires, and any two paired wireless tire pressure sensors can be mutually communicated;

each wireless tire pressure sensor transmits a wireless signal to the wireless receiving device, and the wireless receiving device gives different marks and a positioning position of which tire of the motor vehicle is positioned according to the strength of the wireless signal transmitted by each wireless tire pressure sensor;

the wireless tire pressure sensors of all the marks respectively read the wireless signal intensity of the wireless tire pressure sensors of other marks, and the wireless signal intensity relationship between any two pairs of wireless tire pressure sensors is established, so that whether the positioning position of each wireless tire pressure sensor is correct or not is verified according to the wireless signal intensity relationship.

2. The method as claimed in claim 1, wherein the wireless receiving device searches for each of the wireless tire pressure sensors around, identifies the identity of each of the wireless tire pressure sensors, and enables each of the wireless tire pressure sensors to transmit a wireless signal thereto; the wireless receiving device sequentially requires the wireless tire pressure sensors of each marker to act, and the wireless tire pressure sensors of each marker are enabled to respectively read the wireless signal intensity of the wireless tire pressure sensors of other markers.

3. The method as claimed in claim 1, wherein when the motor vehicle is in motion, the gravity sensor of each wireless tire pressure sensor detects movement, such that each wireless tire pressure sensor transmits wireless signals to the wireless receiving device according to the setting of the internal program, and reads the wireless signal strength of the wireless tire pressure sensors of other tags according to the setting of the internal program.

4. The method according to any one of claims 1 to 3, wherein the motor vehicle has four tires, each of the marks is a number, the wireless receiving device is located in a front half of the motor vehicle and is given a number 1, a number 2, a number 3, and a number 4 from strong to weak according to the strength of the wireless signals transmitted thereto by the wireless tire pressure sensors, wherein the wireless tire pressure sensor with the number 1 is closest to the wireless receiving device;

when the wireless tire pressure sensors with the numbers 2 and 1 have the wireless signal strength approximately equal to the wireless tire pressure sensors with the numbers 3 and 4, that is, the wireless tire pressure sensors with the numbers 2 and 1 are located at two front wheels, the wireless tire pressure sensors with the numbers 3 and 4 are located at two rear wheels, and then the wireless signal strengths between the wireless tire pressure sensors with the numbers 1 and 3 and the numbers 1 and 4 are compared, or the wireless signal strengths between the wireless tire pressure sensors with the numbers 2 and 3 and the numbers 2 and 4 are compared, which of the wireless tire pressure sensors with the numbers 3 and 4 and the wireless receiving device are located at the same side of the motor vehicle is confirmed, and whether the positioning positions of the wireless tire pressure sensors are correct is verified.

5. The method according to any one of claims 1 to 3, wherein the motor vehicle has four tires, each of the marks is a number, the wireless receiving device is located in a rear half of the motor vehicle and is given a number 1, a number 2, a number 3, and a number 4 from strong to weak according to the strength of the wireless signals transmitted thereto by the wireless tire pressure sensors, wherein the wireless tire pressure sensor with the number 1 is closest to the wireless receiving device;

when the wireless tire pressure sensors with the numbers 2 and 1 have the wireless signal strength approximately equal to the wireless tire pressure sensors with the numbers 3 and 4, that is, the wireless tire pressure sensors with the numbers 2 and 1 are located at two rear wheels, the wireless tire pressure sensors with the numbers 3 and 4 are located at two front wheels, the wireless signal strengths between the wireless tire pressure sensors with the numbers 1 and 3 and the numbers 1 and 4 are compared, or the wireless signal strengths between the wireless tire pressure sensors with the numbers 2 and 3 and the numbers 2 and 4 are compared, which of the wireless tire pressure sensors with the numbers 3 and 4 and the wireless receiving device are located at the same side of the motor vehicle is confirmed, and whether the positioning positions of the wireless tire pressure sensors are correct is verified.

6. The method as claimed in claim 2, wherein the wireless tire pressure sensor locating method is implemented by searching the wireless receiving device for the surrounding wireless tire pressure sensors, identifying the identity of each wireless tire pressure sensor, locking one byte of the unique identifier of each wireless tire pressure sensor, and the wireless receiving device then communicating with only the wireless tire pressure sensors having the same byte of the unique identifier.

7. The wireless tire pressure sensor locating method for motor vehicles according to any one of claims 1 to 3, wherein the wireless receiving device is a Bluetooth tire pressure receiver, and each of the wireless tire pressure sensors is a Bluetooth tire pressure sensor.

8. The method according to any one of claims 1 to 3, wherein each labeled wireless tire pressure sensor transmits a wireless signal to the wireless receiving device in a manner of varying at least a plurality of power levels, and transmits a plurality of packets at each power level; the wireless receiving device calculates the distance between the wireless receiving device and each marked wireless tire pressure sensor according to the packet arrival rate trend of each marked wireless tire pressure sensor in each power level, wherein the larger the packet arrival rate trend is, the closer the distance is, and then whether the positioning position of each wireless tire pressure sensor is correct is verified again.

9. The method of claim 4, wherein each numbered tire pressure sensor transmits a wireless signal to the wireless receiving device at least by varying over a plurality of power levels, and transmits a plurality of packets at each power level; the wireless receiving device calculates the distance between the wireless receiving device and each numbered wireless tire pressure sensor according to the size trend of the packet arrival rate of each numbered wireless tire pressure sensor in each power level, and verifies whether the positioning position of each wireless tire pressure sensor is correct again.

10. The method of claim 5, wherein each numbered tire pressure sensor transmits wireless signals to the wireless receiving device with at least a plurality of power levels, and transmits a plurality of packets at each power level; the wireless receiving device calculates the distance between the wireless receiving device and each numbered wireless tire pressure sensor according to the size trend of the packet arrival rate of each numbered wireless tire pressure sensor in each power level, and verifies whether the positioning position of each wireless tire pressure sensor is correct again.

11. The method as claimed in claim 4, wherein the vehicle is provided with a glove box, and the wireless receiving device is located in the glove box.

12. The method of claim 4, wherein the motor vehicle is provided with a steering wheel, and the wireless receiving device is located around the steering wheel.

13. A method of wireless tire pressure sensor location for a motor vehicle, comprising the steps of:

respectively installing a wireless tire pressure sensor on each tire of a motor vehicle, and arranging a wireless receiving device at a position where the motor vehicle is relatively close to one of the tires;

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;

the wireless tire pressure sensor of each mark transmits wireless signals to the wireless receiving device in a mode of at least changing a plurality of power levels, and transmits a plurality of packets in each power level, the wireless receiving device uses the packet arrival rate trend of the wireless tire pressure sensor of each mark in each power level, when the packet arrival rate trend is larger, the packet arrival rate trend indicates that the distance is closer, the distance between the wireless receiving device and the wireless tire pressure sensor of each mark is calculated, and the tire position of each wireless tire pressure sensor in the motor vehicle is positioned.

14. The method according to claim 13, wherein the wireless receiving device searches for each wireless tire pressure sensor in the surroundings, identifies each wireless tire pressure sensor and enables each wireless tire pressure sensor to transmit a wireless signal thereto; the wireless receiving device requests the wireless tire pressure sensor of each mark to transmit wireless signals to the wireless tire pressure sensor in a mode of at least changing a plurality of power levels.

15. The method as claimed in claim 13, wherein the gravity sensor of each tire pressure sensor is configured to transmit wireless signals to the wireless receiving device according to the internal program setting and to transmit wireless signals to the wireless receiving device in a manner of at least varying a plurality of power levels according to the internal program setting as the movement of the gravity sensor of each tire pressure sensor is detected when the motor vehicle is in motion.

16. The method as claimed in any one of claims 13 to 15, wherein the vehicle has two tires and is divided into a front wheel and a rear wheel, the marks are numbers, the wireless receiving device is located in the front half of the vehicle and is given numbers 1 and 2 according to the strength of the wireless signals transmitted to the wireless tire pressure sensors, when the packet arrival rates of the wireless tire pressure sensors of number 1 in each power level have a trend greater than that of number 2, that is, the wireless tire pressure sensor of number 1 is located at the front wheel, and the wireless tire pressure sensor of number 2 is located at the rear wheel.

17. The method as claimed in any one of claims 13 to 15, wherein the vehicle has two tires and is divided into a front wheel and a rear wheel, the marks are numbers, the wireless receiving device is located in the rear half of the vehicle and is given numbers 1 and 2 according to the strength of the wireless signals transmitted to the wireless tire pressure sensors, when the packet arrival rates of the wireless tire pressure sensors of number 1 in each power level have a trend greater than that of number 2, that is, the wireless tire pressure sensor of number 1 is located in the rear wheel, and the wireless tire pressure sensor of number 2 is located in the front wheel.

18. The method as claimed in any one of claims 13 to 15, wherein the vehicle has four tires, each of the marks is a number, the wireless receiving device is given numbers 1, 2, 3 and 4 according to the strength of the wireless signals transmitted from the wireless tire pressure sensors to the wireless receiving device, and when the packet arrival rates of the wireless tire pressure sensors with numbers 1, 2, 3 and 4 in each power level trend from large to small, the wireless tire pressure sensors with numbers 1, 2, 3 and 4 are located at the tires with distances from the wireless receiving device from near to far respectively.

19. The method as claimed in claim 14, wherein the wireless tire pressure sensor locating method is implemented by searching the wireless receiving device for the surrounding wireless tire pressure sensors, identifying the identity of each wireless tire pressure sensor, locking one byte of the unique identifier of each wireless tire pressure sensor, and the wireless receiving device then communicating with only the wireless tire pressure sensors having the same byte of the unique identifier.

20. The wireless tire pressure sensor locating method for a motor vehicle according to claim 19, wherein the wireless receiving device is a bluetooth tire pressure receiver and each of the wireless tire pressure sensors is a bluetooth tire pressure sensor.

21. A wireless tire pressure sensor locating system for a motor vehicle, comprising:

the motor vehicle at least comprises more than two tires, wherein each tire is respectively provided with a wireless tire pressure sensor, a wireless receiving device is arranged at a position where the motor vehicle is relatively close to one of the tires, and any two paired wireless tire pressure sensors can be mutually communicated;

each wireless tire pressure sensor transmits a wireless signal to the wireless receiving device, and the wireless receiving device gives different marks and the positioning position of which tire of the motor vehicle is positioned according to the strength of the wireless signal transmitted by each wireless tire pressure sensor to the wireless receiving device.

22. The wireless tire pressure sensor positioning system for motor vehicles according to claim 21, wherein the wireless tire pressure sensor of each of the markers respectively reads the wireless signal strength of the wireless tire pressure sensors of other markers, and establishes a wireless signal strength relationship between any two pairs of wireless tire pressure sensors, so as to verify whether the positioning position of each wireless tire pressure sensor is correct.

23. The wireless tire pressure sensor positioning system of claim 22, wherein the wireless receiving device searches for each wireless tire pressure sensor in the surroundings, identifies each wireless tire pressure sensor and enables each wireless tire pressure sensor to transmit a wireless signal thereto; the wireless receiving device sequentially requires the wireless tire pressure sensors of each marker to act, and the wireless tire pressure sensors of each marker are enabled to respectively read the wireless signal intensity of the wireless tire pressure sensors of other markers.

24. The method as claimed in claim 22, wherein when the motor vehicle is in motion, the gravity sensor of each wireless tire pressure sensor detects movement, such that each wireless tire pressure sensor transmits wireless signals to the wireless receiving device according to the setting of the internal program, and reads the wireless signal strength of the wireless tire pressure sensors of other tags according to the setting of the internal program.

25. The method as claimed in claim 23, wherein the wireless tire pressure sensor locating method is implemented by searching the wireless receiving device for the surrounding wireless tire pressure sensors, identifying the identity of each wireless tire pressure sensor, locking one byte of the unique identifier of each wireless tire pressure sensor, and the wireless receiving device then communicating with only the wireless tire pressure sensors having the same byte of the unique identifier.

26. The wireless tire pressure sensor locating system according to any one of claims 21 to 25, wherein each of the labeled wireless tire pressure sensors transmits a wireless signal to the wireless receiving device in a manner varying at least a plurality of power levels, and transmits a plurality of packets at each power level; the wireless receiving device calculates the distance between the wireless receiving device and each marked wireless tire pressure sensor according to the packet arrival rate trend of each marked wireless tire pressure sensor in each power level, wherein the larger the packet arrival rate trend is, the closer the distance is, and then whether the positioning position of each wireless tire pressure sensor is correct is verified again.

27. A wireless tire pressure sensor locating system for a motor vehicle, comprising:

the motor vehicle at least comprises more than two tires, each tire is respectively provided with a wireless tire pressure sensor, and a wireless receiving device is arranged at a position where the motor vehicle is relatively close to one of the tires;

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;

the wireless tire pressure sensor of each mark transmits a wireless signal to the wireless receiving device in a mode of at least changing a plurality of power levels, and a plurality of packets are sent in each power level, the wireless receiving device uses the packet arrival rate trend of the wireless tire pressure sensor of each mark in each power level, when the packet arrival rate trend is larger, the closer the distance is indicated, the distance between the wireless receiving device and the wireless tire pressure sensor of each mark is calculated, and the tire position of each wireless tire pressure sensor in the motor vehicle is positioned.

28. The wireless tire pressure sensor positioning system of claim 27, wherein the wireless receiving device searches for each wireless tire pressure sensor in the surroundings, identifies each wireless tire pressure sensor and enables each wireless tire pressure sensor to transmit a wireless signal thereto; the wireless receiving device requests the wireless tire pressure sensor of each mark to transmit wireless signals to the wireless tire pressure sensor in a mode of at least changing a plurality of power levels.

29. The system of claim 27, wherein the gravity sensor of each tire pressure sensor is configured to transmit a wireless signal to the wireless receiver according to the internal programming settings and to transmit a wireless signal to the wireless receiver with at least a plurality of power levels varied according to the internal programming settings when the vehicle is in motion.

30. The wireless tire pressure sensor location system of claim 28, wherein after the wireless receiving device searches for the surrounding wireless tire pressure sensors and identifies the identity of each wireless tire pressure sensor, one byte of the unique identifier of each wireless tire pressure sensor is locked, and the wireless receiving device then only communicates with the wireless tire pressure sensors having the same byte of the unique identifier.

31. A method of wireless tire pressure sensor location for a motor vehicle, comprising the steps of:

respectively installing a wireless tire pressure sensor on each tire of a motor vehicle, and arranging a wireless receiving device at a position where the motor vehicle is relatively close to one of the tires;

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;

the wireless receiving device transmits wireless signals to the wireless tire pressure sensors of each mark in a mode of at least changing a plurality of power levels, and sends a plurality of packets in each power level, each wireless tire pressure sensor transmits the receiving result back to the wireless receiving device for collection, and the distance between the wireless tire pressure sensor of each mark and the wireless receiving device is calculated according to the trend of the packet arrival rate received by the wireless tire pressure sensor of each mark in each power level, and the tire position of each wireless tire pressure sensor in the motor vehicle is positioned according to the trend of the packet arrival rate, wherein the trend is larger, the distance is closer, and the distance between the wireless tire pressure sensor of each mark and the wireless receiving device is calculated.

32. The method as claimed in claim 31, wherein the vehicle has two tires and is divided into a front wheel and a rear wheel, the marks are numbers, the wireless receiving device is located in a front half of the vehicle and is given numbers 1 and 2 according to the strength of the wireless signals transmitted from the wireless tire pressure sensors, when the packet arrival rates of the wireless tire pressure sensors of number 1 in each power class are all more than the packet arrival rates of number 2, that is, the wireless tire pressure sensor of number 1 is located in the front wheel, and the wireless tire pressure sensor of number 2 is located in the rear wheel.

33. The method as claimed in claim 31, wherein the tire pressure sensor of the motor vehicle has two tires and is divided into a front wheel and a rear wheel, the labels are numbers, the wireless receiving device is located in a rear half of the motor vehicle and is assigned with numbers 1 and 2 according to the strength of the wireless signals transmitted thereto by the wireless tire pressure sensors, when the packet arrival rates of the wireless tire pressure sensors of number 1 at each power level have a trend of greater than that of number 2, i.e. the wireless tire pressure sensor of number 1 is located at the rear wheel and the wireless tire pressure sensor of number 2 is located at the front wheel.

34. The method as claimed in claim 31, wherein the tire pressure sensor of the motor vehicle has four tires, each of the marks is a number, the wireless receiving device is given a number 1, a number 2, a number 3 and a number 4 according to the strength of the wireless signals transmitted from the wireless tire pressure sensors to the wireless receiving device, and when the packet arrival rates of the wireless tire pressure sensors of the number 1, the number 2, the number 3 and the number 4 at each power level tend to decrease from large to small, the wireless tire pressure sensors of the number 1, the number 2, the number 3 and the number 4 are respectively located at a position which is far from the wireless receiving device.

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