CN108583170B

CN108583170B - Tire self-positioning system and method

Info

Publication number: CN108583170B
Application number: CN201810502847.8A
Authority: CN
Inventors: 欧建平; 郑利利; 贾丹丽; 熊想涛
Original assignee: Zhejiang Geely Holding Group Co Ltd; Zhejiang Geely Automobile Research Institute Co Ltd
Current assignee: Zhejiang Geely Holding Group Co Ltd; Zhejiang Geely Automobile Research Institute Co Ltd
Priority date: 2018-05-23
Filing date: 2018-05-23
Publication date: 2021-01-05
Anticipated expiration: 2038-05-23
Also published as: CN108583170A

Abstract

The invention provides a tire self-positioning system, comprising: the receiving module is used for receiving and storing the positioning frame and the tooth number signals; the TPMS sensor is used for sending a positioning frame to the receiving module when the vehicle enters a motion mode from a parking mode and the TPMS sensor reaches a specific position; the wheel gear tooth counting sensor is used for acquiring the tooth number signals of each wheel and sending the tooth number signals to the receiving module; the query module is used for querying the tooth number signal according to the reverse time and the receiving time of the positioning frame; the positioning module is used for positioning the TPMS sensor ID to the wheel with the minimum variance and/or standard deviation, so that the display unit displays information corresponding to the actual position of the tire. The invention also provides a tire self-positioning method. The invention adopts the special positioning frame, effectively reduces the length of the data frame, simplifies the self-positioning algorithm of the tire, and makes the electric quantity of the TPMS sensor more durable.

Description

Tire self-positioning system and method

Technical Field

The invention relates to the technical field of automobile electronics, in particular to a tire self-positioning system and a tire self-positioning method.

Background

In the using process of the vehicle, after the user adjusts the positions of the four tires, the left front tire information, the right front tire information, the left rear tire information and the right rear tire information displayed on the vehicle TPMS display unit are inconsistent with the actual tire positions. The prior art realizes the self-positioning function of the tire in the following ways:

1) the self-positioning mode based on the field intensity is low in cost, most functions can be realized through a software algorithm, but the self-positioning mode is easy to be interfered by signals depending on wiring of an automobile, the algorithm is complex, and the realization difficulty is high;

2) the self-positioning mode based on the external coding memory is not easily interfered by signals, the success rate is high, however, external devices are additionally arranged at the accessories of the automobile tires, the cost is high, additional wiring is required, and the circuits of the original automobile may need to be changed;

3) based on the CAN bus self-positioning mode, the signal sending end needs to be placed at a position away from the remote pressure detection module accessory to well realize the self-positioning function.

Disclosure of Invention

In order to solve the problem that the tire position information displayed on a vehicle TPMS display unit cannot correspond to the actual tire position information one by one after a user adjusts the positions of four tires, the invention provides a tire self-positioning method, which has the following specific technical scheme:

a tire self-positioning system comprising the following modules:

the receiving module is used for receiving and respectively storing the positioning frames according to the ID of the TPMS sensor, and receiving and respectively storing the tooth number signals according to the wheel pair;

the TPMS sensor is used for sending the positioning frame to the receiving module when the vehicle enters a motion mode from a parking mode; the positioning frame carries the ID and the reverse time of the TPMS sensor;

the wheel gear tooth counting sensor is used for acquiring the tooth number signals of the wheel and sending the tooth number signals to the receiving module;

the query module is used for querying the tooth number signal according to the reverse time and the receiving time of the positioning frame to acquire a wheel tooth number sequence of each wheel when the TPMS sensor is at a specific position;

and the positioning module is used for carrying out remainder processing on the wheel tooth number sequence by using the fixed tooth number of each wheel, calculating the variance and/or standard deviation according to a remainder result, and positioning the ID of the TPMS sensor to the wheel with the minimum variance and/or standard deviation.

Further, still include:

the wheel speed judging module is used for judging whether the wheel speed is greater than a preset value; if yes, the operation of sending the positioning frame to the receiving module is executed; if not, the operation of sending the positioning frame to the receiving module is not executed;

and/or the presence of a gas in the gas,

the frame number judging module is used for judging whether the number of the positioning frames sent by the TPMS sensor in a one-time driving mode reaches the maximum frame number; if so, the operation of sending the positioning frame to the receiving module is not executed; and if not, executing the operation of sending the positioning frame to the receiving module.

Further, still include:

the error judgment module is used for judging whether the variance and/or the standard deviation exceed a preset error value; if yes, the tire self-positioning process is executed again; and if not, positioning the TPMS sensor ID to the wheel with the minimum variance and/or standard deviation.

Further, the receiving module stores the tooth number signal for a period of time in a first-in first-out manner.

Further, the reverse time is T1-T0, and T0 is the time when the TPMS sensor reaches the specific position; t1 is the time when the TPMS sensor transmits the positioning frame.

Further, the positioning frame also carries phase information and/or a CRC check value.

Further, the wheel tooth count sensor is part of an anti-lock braking system (ABS).

Meanwhile, the invention provides a tire self-positioning method, which comprises the following specific technical scheme:

a method of self-positioning a tyre, comprising the steps of:

the TPMS sensor sends a positioning frame to the receiving module when the vehicle enters a motion mode from a parking mode; the positioning frame carries the ID and the reverse time of the TPMS sensor;

the wheel gear tooth counting sensor collects the gear number signals of the wheel and sends the signals to the receiving module;

the receiving module receives and respectively stores the positioning frames according to the ID of the TPMS sensor, and receives and respectively stores the tooth number signals according to the wheel;

the inquiring module inquires the tooth number signal according to the reverse time and the receiving time of the positioning frame, and obtains a wheel tooth number sequence of each wheel when the TPMS sensor is at a specific position;

Further, before sending the positioning frame to the receiving module, the method further includes:

the wheel speed judging module judges whether the wheel speed of the wheel is greater than a preset value; if yes, the operation of sending the positioning frame to the receiving module is executed; if not, the operation of sending the positioning frame to the receiving module is not executed;

and/or the presence of a gas in the gas,

the frame number judging module judges whether the number of the positioning frames sent by the TPMS sensor in a one-time driving mode reaches the maximum frame number; if so, the operation of sending the positioning frame to the receiving module is not executed; if not, the operation of sending the positioning frame to the receiving module is executed.

Further, said locating said TPMS sensor ID before the wheel with the smallest variance and/or standard deviation further comprises:

judging whether the standard deviation exceeds a preset error value or not;

if yes, the tire self-positioning process is executed again; and if not, positioning the TPMS sensor ID to the wheel with the minimum variance and/or standard deviation.

The implementation of the invention has the following beneficial effects:

1. the invention adopts the special positioning frame, effectively reduces the length of the data frame, thereby reducing the electric quantity consumption and enabling the electric quantity of the TPMS controller to be more durable; meanwhile, shortening of the data frame length can also reduce the failure rate of RF transmission/reception.

2. The invention adopts the reverse time in the positioning frame, and simplifies the algorithm of the TPMS sensor and the controller.

3. In the driving mode, the positioning frame is allowed to be sent only when the wheel speed exceeds the preset speed, and the number of the positioning frames sent by the TPMS sensor in one driving mode does not exceed the maximum frame number, so that the consumption of a battery can be reduced as much as possible.

4. After the tire transposition is carried out, the controller corresponds the actual positions of the TPMS sensors to the positions of the vehicle display units one by one according to the positioning frames sent by the TPMS sensors and the recorded tooth number signals of the tires, the IDs of the tire sensors are not required to be changed manually or by auxiliary equipment, the error rate caused by manual intervention is fundamentally eliminated, and the positioning result is accurate and reliable.

5. Compared with the prior art that the tire position is identified by changing hardware, the invention can greatly reduce the production cost, improve the production efficiency, and has wide application object range and accurate and reliable positioning structure.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a block diagram of a tire self-positioning system according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the operation of a tire self-positioning system provided by an embodiment of the present invention;

FIG. 3 is a functional diagram of a wheel tooth count sensor provided by an embodiment of the present invention;

FIG. 4 is a schematic diagram of an installation location of a TPMS sensor provided by an embodiment of the invention;

FIG. 5 is a schematic structural diagram of a TPMS sensor provided by an embodiment of the invention;

FIG. 6 is a schematic diagram of a TPMS sensor specific location provided by an embodiment of the present invention;

FIG. 7 is a schematic diagram of TPMS sensor specific location versus reverse time provided by an embodiment of the present invention;

FIG. 8 is a diagram illustrating a positioning frame format according to an embodiment of the present invention;

fig. 9 is a flowchart of a tire self-positioning method according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout.

Example 1

Fig. 1 is a structural block diagram of a tire self-positioning system according to an embodiment of the present invention, referring to fig. 1, the tire self-positioning system according to the embodiment includes the following modules:

the receiving module 103 is used for receiving and storing the positioning frames according to the ID of the TPMS sensor, and receiving and storing the tooth number signals according to the wheel pair;

the TPMS sensor 101 is used for sending a positioning frame to the receiving module 103 when the vehicle enters a motion mode from a parking mode; the positioning frame carries the ID of the TPMS sensor and the backward time;

the wheel gear tooth counting sensor 102 is used for acquiring a gear tooth number signal of a wheel and sending the gear tooth number signal to the receiving module 103;

the query module 104 is configured to query the tooth number signal according to the reverse time and the receiving time of the positioning frame, and acquire a wheel tooth number sequence of each wheel when the TPMS sensor is at a specific position;

and the positioning module 105 is used for performing remainder processing on the wheel tooth number sequence by using the fixed tooth number of each wheel, calculating the variance and/or standard deviation according to the remainder result, and positioning the ID of the TPMS sensor to the wheel with the minimum variance and/or standard deviation.

Fig. 2 is a schematic diagram of the operation of a self-positioning system for tires according to an embodiment of the present invention, as shown in fig. 2, a TPMS sensor 101 is disposed in each tire, and each TPMS sensor 101 has a unique ID. Each wheel is provided with a wheel tooth counting sensor 102, and the wheel tooth counting sensor 102 detects the information of the number of teeth rotating when the tire rotates. The TPMS sensor 101 and the wheel tooth count sensor 102 both send signals to the controller, and the controller receives and processes the signals and displays the display results in the display unit. The display unit may be a meter, a center control screen, or other display device.

Fig. 3 is a schematic diagram of a wheel tooth count sensor according to an embodiment of the present invention, and referring to fig. 3, the wheel tooth count sensor 102 may be a wheel speed sensor, such as a magneto-electric wheel speed sensor or a hall wheel speed sensor. Preferably, the wheel tooth count sensor 102 is part of an anti-lock braking system (ABS).

Fig. 4 is a schematic diagram of an installation location of a TPMS sensor according to an embodiment of the present invention, referring to fig. 4, the TPMS sensor 101 is disposed on each wheel, and after installation, the TPMS sensor 101 writes a sensor ID into a controller through a device. Fig. 5 is a schematic structural diagram of a TPMS sensor according to an embodiment of the present invention, and referring to fig. 5, in an implementation manner of this embodiment, the TPMS sensor 101 may adopt the structure shown in fig. 5, and the TPMS sensor 101 includes a pressure sensor, a temperature sensor, an acceleration sensor, a microprocessor, and a high-frequency signal transmitting circuit. When the wheel rotates, the TPMS sensor 101 can not only detect the acceleration of the wheel rotation by its internal acceleration sensor, but also recognize the states of the TPMS sensor 101 at the top and bottom of the wheel.

In an optional implementation manner of this embodiment, the tire self-positioning system further includes a wheel speed determination module, where the wheel speed determination module is configured to determine whether a wheel speed is greater than a preset value; if yes, the operation of sending the positioning frame to the receiving module 103 is executed; if not, the operation of sending the positioning frame to the receiving module 103 is not executed. Preferably, the preset value is not less than 30km/h, for example, the preset speed may be 30km/h, 32km/h, or the like.

In an optional implementation manner of this embodiment, the tire self-positioning system further includes a frame number judging module, where the frame number judging module is configured to judge whether the number of positioning frames sent by the TPMS sensor 101 in a one-time driving mode reaches a maximum frame number; for example, the maximum number of frames is 25 frames, 30 frames, 35 frames, and so on. If yes, the operation of sending the positioning frame to the receiving module 103 is not executed; if not, the operation of sending the positioning frame to the receiving module 103 is executed. By arranging the frame number judging module, the consumption of the battery can be reduced as much as possible.

In an alternative implementation of this embodiment, the tire self-positioning system further includes a wheel speed determination module and a frame number determination module. The wheel speed judging module is used for judging whether the wheel speed is greater than a preset value; if yes, the operation of sending the positioning frame to the receiving module 103 is executed; if not, the operation of sending the positioning frame to the receiving module 103 is not executed. The frame number judging module is used for judging whether the number of the positioning frames sent by the TPMS sensor 101 in a one-time driving mode reaches the maximum frame number; if yes, the operation of sending the positioning frame to the receiving module 103 is not executed; if not, the operation of sending the positioning frame to the receiving module 103 is executed.

In an optional implementation manner of this embodiment, the tire self-positioning system further includes an error determination module, where the error determination module is configured to determine whether the variance and/or the standard deviation exceed a preset error value; if yes, executing the self-positioning process of the tire again; if not, positioning the TPMS sensor ID to the wheel with the minimum variance and/or standard deviation is carried out.

Preferably, each phase of wheel has a wheel tooth number measuring device, the receiving module 103 tabulates each wheel according to the tooth number signal sent by the wheel tooth count sensor 102, records in a first-in first-out manner, and can calculate the relative position of the TPMS sensor 101 and the wheel through the reverse time and the tooth number signal.

Table 1 shows the sets of wheel teeth for the front left wheel and the time data for receiving the wheel teeth.

TABLE 1

For a stationary vehicle, the wheel tooth count sensor 102 can send a fixed number of teeth, such as 40 teeth, 48 teeth, or other, for one revolution of the tire. The number of teeth obtained by the rewind time when the positioning frame is received is divided by the fixed number of teeth to obtain the remaining values, and tabulated (see table 2).

TABLE 2

According to the results of the remainder processing in table 2, the variance/mean square error of each wheel is calculated, and it is obvious that the variance of the number of right front wheels is minimum, and the TPMS sensor 101 can be installed in the right front tire, and the installation positions of the other TPMS sensors 101 can be obtained by the same method. Thereby causing the display to display information corresponding to the actual tire position information.

Specifically, the reverse time is T1-T0, and T0 is the time at which the TPMS sensor 101 reaches a specific location; t1 is the time at which the TPMS sensor 101 transmits the positioning frame. Fig. 6 is a schematic diagram of a specific location of a TPMS sensor according to an embodiment of the present invention, please refer to fig. 6, where an acceleration variation curve measured by the TPMS sensor 101 through a built-in acceleration sensor is a sine curve or a cosine curve. The time for one wheel revolution is exactly the duration of one cycle. Solid dots in the oscillogram are distributed at the wave crests and the wave troughs of the oscillogram, and when the TPMS sensor 101 is positioned at the bottom of the wheel, the acceleration reaches the maximum value and corresponds to the solid dots at the wave crests; with the TPMS sensor 101 at the top of the wheel, the acceleration reaches a minimum value, corresponding to a solid circular dot at the trough of the wave.

In one implementation of this embodiment, the specific location is a wheel bottom. Fig. 7 is a schematic diagram of the relationship between the specific position of the TPMS sensor and the reverse time according to the embodiment of the present invention, please refer to fig. 7, where T0 is the time when the TPMS sensor 101 is at the bottom position of the wheel; t1 is the time when the TPMS sensor 101 transmits a high frequency signal frame. The TPMS sensor 101 detects the wheel bottom position when the positioning frame needs to be transmitted, records the time when the TPMS sensor 101 reaches the wheel bottom as T0, and writes the time length from T0 to the time T1 when the high-frequency signal frame is transmitted as the reverse time in the positioning frame.

In one implementation of this embodiment, the specific location is a wheel top. T0 is the time when the TPMS sensor 101 is in the wheel top position; t is₁The time at which the TPMS sensor 101 transmits the high frequency signal frame. The TPMS sensor 101 detects the top position when the positioning frame needs to be transmitted, records the time when the TPMS sensor 101 reaches the bottom of the wheel as T0, and writes the time length from T0 to the time T1 when the high-frequency signal frame is transmitted as the reverse time in the positioning frame.

Fig. 8 is a schematic diagram of a positioning frame format according to an embodiment of the present invention, and as shown in fig. 8, preferably, the positioning frame further carries a CRC check value. CRC check, also called cyclic redundancy check, is a data transmission error detection function that performs polynomial calculation on data, attaches the obtained result to the back of a frame, and the receiving device also executes a similar algorithm to ensure the correctness and integrity of data transmission.

Alternatively, the positioning frame carries phase information and a CRC check value.

Alternatively, the TPMS sensor 101 transmits a high frequency signal at a fixed location.

It should be noted that, by using the fixed position transmission of the TPMS sensor 101 or the current phase signal carried in the information sent by the TPMS sensor 101, the problem that the tire position information displayed on the vehicle TPMS display unit and the actual tire position information cannot be in one-to-one correspondence after the user adjusts the positions of the four tires can also be solved.

Example 2

FIG. 9 is a flow chart of a method for self-positioning a tire provided by an embodiment of the present invention, showing only those steps relevant to the subject matter herein for simplicity. The overall tire self-positioning method may have many other steps and many other types of equipment may be used. Referring to fig. 9, the present embodiment provides a tire self-positioning method, including the following steps:

s201: the TPMS sensor sends a positioning frame to the receiving module when the vehicle enters a motion mode from a parking mode; the positioning frame carries the ID of the TPMS sensor and the backward time;

s202: the wheel gear tooth counting sensor collects the gear number signals of the wheel and sends the signals to the receiving module;

s203: the receiving module receives and respectively stores the positioning frames according to the ID of the TPMS sensor, and receives and respectively stores the tooth number signals according to the wheel pair;

s204: the inquiring module inquires the tooth number signal according to the reverse time and the receiving time of the positioning frame, and obtains a wheel tooth number sequence of each wheel when the TPMS sensor is at a specific position;

s205: and the positioning module carries out remainder processing on the wheel tooth number sequence by using the fixed tooth number of each wheel, calculates the variance and/or standard deviation according to the remainder result, and positions the ID of the TPMS sensor to the wheel with the minimum variance and/or standard deviation.

Specifically, the receiving module stores the tooth number signal for a period of time in a first-in first-out manner.

Specifically, the reverse time is T1-T0, and T0 is the time when the TPMS sensor reaches a specific position; t1 is the time when the TPMS sensor transmits the positioning frame.

In an optional implementation manner of this embodiment, before sending the positioning frame to the receiving module, the method further includes: the wheel speed judging module judges whether the wheel speed of the wheel is greater than a preset value; if yes, the operation of sending the positioning frame to the receiving module is executed; if not, the operation of sending the positioning frame to the receiving module is not executed;

in an optional implementation manner of this embodiment, before sending the positioning frame to the receiving module, the method further includes: the frame number judging module judges whether the number of the positioning frames sent by the TPMS sensor in a one-time driving mode reaches the maximum frame number; if yes, the operation of sending the positioning frame to the receiving module is not executed; if not, the operation of sending the positioning frame to the receiving module is executed.

In an optional implementation manner of this embodiment, before sending the positioning frame to the receiving module, the method further includes: s206: the wheel speed judging module judges whether the wheel speed of the wheel is greater than a preset value; if yes, the operation of sending the positioning frame to the receiving module is executed; if not, the operation of sending the positioning frame to the receiving module is not executed; s207: the frame number judging module judges whether the number of the positioning frames sent by the TPMS sensor in a one-time driving mode reaches the maximum frame number; if yes, the operation of sending the positioning frame to the receiving module is not executed; if not, the operation of sending the positioning frame to the receiving module is executed. It should be noted that, in this embodiment, the order of S206 and S207 is not limited, and S206 may be performed before S207, or may be performed after S207, or S206 and S207 may also be performed simultaneously.

In an optional implementation manner of this embodiment, locating the TPMS sensor ID before the wheel with the smallest variance and/or standard deviation further includes:

judging whether the standard deviation exceeds a preset error value or not;

if yes, executing the self-positioning process of the tire again; if not, positioning the TPMS sensor ID to the wheel with the minimum variance and/or standard deviation is carried out.

The embodiment has the following beneficial effects:

4. After the tire transposition is carried out, the controller corresponds the actual positions of the TPMS sensors to the positions of the vehicle display units one by one according to the positioning information sent by the received TPMS sensors and the recorded tooth number signals of the tires, the IDs of the tire sensors are not required to be changed manually or by auxiliary equipment, the error rate caused by manual intervention is fundamentally eliminated, and the positioning result is accurate and reliable.

Those of skill in the art will further appreciate that the various illustrative logical blocks, units, and steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both. To clearly illustrate the interchangeability of hardware and software, various illustrative components, elements, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design requirements of the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present embodiments.

The various illustrative logical blocks, or elements, described in connection with the embodiments disclosed herein may be implemented or performed with a general purpose processor, a digital signal processor, an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, e.g., a digital signal processor and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a digital signal processor core, or any other similar configuration.

The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may be stored in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. For example, a storage medium may be coupled to the processor such the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC, which may be located in a user terminal. In the alternative, the processor and the storage medium may reside in different components in a user terminal.

In one or more exemplary designs, the functions described above in connection with the embodiments of the invention may be implemented in hardware, software, firmware, or any combination of the three. If implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media that facilitate transfer of a computer program from one place to another. Storage media may be any available media that can be accessed by a general purpose or special purpose computer. For example, such computer-readable media can include, but is not limited to, RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to carry or store program code in the form of instructions or data structures and which can be read by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Additionally, any connection is properly termed a computer-readable medium, and, thus, is included if the software is transmitted from a website, server, or other remote source over a coaxial cable, fiber optic computer, twisted pair, Digital Subscriber Line (DSL), or wirelessly, e.g., infrared, radio, and microwave. Such discs (disk) and disks (disc) include compact disks, laser disks, optical disks, DVDs, floppy disks and blu-ray disks where disks usually reproduce data magnetically, while disks usually reproduce data optically with lasers. Combinations of the above may also be included in the computer-readable medium.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A tire self-positioning system, comprising:

and the positioning module is used for carrying out remainder processing on the wheel tooth number sequence by using the fixed tooth number of each wheel, calculating the variance and/or standard deviation according to a remainder result, positioning the ID of the TPMS sensor to the wheel with the minimum variance and/or standard deviation, and calculating the relative position of the TPMS sensor and the wheel through the backward time and the tooth number signal.

2. The tire self-positioning system of claim 1, further comprising:

and/or the presence of a gas in the gas,

3. The tire self-positioning system of claim 1, further comprising:

4. The tire self-positioning system of claim 1 wherein said receiver module stores the tooth number signal for a period of time in a first-in-first-out manner.

5. The tire self-positioning system of claim 1 wherein said reverse time is T1-T0, T0 being the time at which said TPMS sensor reaches said particular location; and T1 is the time for the TPMS sensor to transmit the positioning frame.

6. The tire self-positioning system of claim 1, wherein the positioning frame further carries phase information and/or a CRC check value.

7. The tire self-positioning system of claim 1, wherein said wheel tooth count sensor is part of an anti-lock braking system (ABS).

8. A method for self-positioning a tire, comprising:

9. The method for self-positioning a tire according to claim 8, wherein said transmitting a positioning frame to a receiving module further comprises:

and/or the presence of a gas in the gas,

10. The method of self-positioning a tire as in claim 8, wherein said locating said TPMS sensor ID before the wheel with the smallest variance and/or standard deviation further comprises:

judging whether the standard deviation exceeds a preset error value or not;