KR101418513B1 - Tire Pressure Monitoring Module, Tire Pressure Monitoring System comprising the same - Google Patents

Abstract

The present invention relates to a tire pressure sensing module for simply identifying and automatically assigning a position of a tire pressure sensing module and a tire pressure sensing system including the same. A tire pressure sensing module according to an embodiment of the present invention includes a centripetal acceleration sensor for sensing a centripetal acceleration of a wheel; A pressure sensing sensor for sensing pressure or temperature of the tire; A pressure sensing controller for extracting a table number matching a centripetal acceleration value sensed by the centripetal acceleration sensor from a predetermined acceleration table; And a pressure sensing transmitter for transmitting tire information including a pressure value or a temperature value of the tire sensed by the pressure sensing sensor and the table number.

Description

Technical Field The present invention relates to a tire pressure sensing module and a tire pressure sensing system including the tire pressure sensing module.

The present invention relates to a tire pressure sensing module and a tire pressure sensing system including the tire pressure sensing module. More particularly, the present invention relates to a tire pressure sensing module for simply determining the position of a tire pressure sensing module and automatically assigning the position thereof, .

The tire pressure sensing system senses the pressure and / or temperature of the tire and sends it to the driver's seat so that the driver can check the pressure of the tire in real time.

If the air pressure of a car tire is too high or too low, there is a possibility that a tire may be blown or the vehicle may slip easily, leading to a major accident. In addition, the fuel consumption increases, fuel economy deteriorates, tire life is shortened, and ride comfort and braking power are reduced.

In order to prevent defects in such tires, a safety device mounted on the vehicle is a tire pressure sensing system. The tire pressure sensing system measures the pressure and / or temperature inside the tire and sends this information wirelessly. There is a problem in that it is not possible to determine from which tire pressure sensor the pressure and / or temperature information of the tire received wirelessly when the wheel, the tire, or the like is first mounted, replaced, or changed in position.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a tire pressure sensing module for automatically determining the position of a tire monitoring module and automatically assigning the position of the tire sensing module and a tire pressure sensing system including the tire pressure sensing module.

The problems of the present invention are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a tire pressure sensing module including: a centripetal acceleration sensor for sensing a centripetal acceleration of a wheel; A pressure sensing sensor for sensing pressure or temperature of the tire; A pressure sensing controller for extracting a table number matching a centripetal acceleration value sensed by the centripetal acceleration sensor from a predetermined acceleration table; And a pressure sensing transmitter for transmitting tire information including a pressure value or a temperature value of the tire sensed by the pressure sensing sensor and the table number.

The details of other embodiments are included in the detailed description and drawings.

According to the tire pressure sensing module and the tire pressure sensing system including the tire pressure sensing module of the present invention, the position of the tire pressure sensing module can be assigned without complicated calculation such as phase angle calculation using the centripetal acceleration of the wheel sensed by the tire pressure sensing module There are advantages.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

1 is a block diagram of a tire pressure sensing system in accordance with an embodiment of the present invention.
2 is a block diagram of a tire pressure sensing module according to an embodiment of the present invention.
3 is a view showing an arrangement of a tire pressure sensing module according to an embodiment of the present invention.
4 is a diagram illustrating a relationship between a centripetal acceleration sensed by a tire pressure sensing module and a wheel rotation speed according to an embodiment of the present invention.
5 is a diagram illustrating an acceleration table stored in a tire pressure sensing module according to an embodiment of the present invention.
6 is a diagram showing a configuration of tire information according to an embodiment of the present invention.
7 is a block diagram of a control unit according to an embodiment of the present invention.
8 is a diagram illustrating a rotational speed table stored in a control unit according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

The suffix "module" and "part" for constituent elements used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role.

At this point, it will be appreciated that the combinations of blocks and flowchart illustrations in the process flow diagrams may be performed by computer program instructions. These computer program instructions may be loaded into a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, so that those instructions, which are executed through a processor of a computer or other programmable data processing apparatus, Thereby creating means for performing functions. These computer program instructions may also be stored in a computer usable or computer readable memory capable of directing a computer or other programmable data processing apparatus to implement the functionality in a particular manner so that the computer usable or computer readable memory The instructions stored in the block diagram (s) are also capable of producing manufacturing items containing instruction means for performing the functions described in the flowchart block (s). Computer program instructions may also be stored on a computer or other programmable data processing equipment so that a series of operating steps may be performed on a computer or other programmable data processing equipment to create a computer- It is also possible for the instructions to perform the processing equipment to provide steps for executing the functions described in the flowchart block (s).

In addition, each block may represent a module, segment, or portion of code that includes one or more executable instructions for executing the specified logical function (s). It should also be noted that in some alternative implementations, the functions mentioned in the blocks may occur out of order. For example, two blocks shown in succession may actually be executed substantially concurrently, or the blocks may sometimes be performed in reverse order according to the corresponding function.

Hereinafter, the present invention will be described with reference to the drawings for explaining a tire pressure sensing module and a tire pressure sensing system including the tire pressure sensing module according to embodiments of the present invention.

1 is a block diagram of a tire pressure sensing system in accordance with an embodiment of the present invention.

The tire pressure sensing system 100 according to an embodiment of the present invention senses the pressure and / or temperature of the tire 20 and wirelessly transmits tire information including sensed pressure values and / or temperature values and other information A wheel rotation detection module 130 for sensing a rotation speed of the wheel 10, a tire information receiving module 130 for wirelessly receiving tire information transmitted from the tire pressure detection module 120, Module 150 receives the rotation speed of the wheel 10 from the wheel rotation detection module 130 and receives the tire information from the tire information reception module 150 to automatically assign the position of the tire pressure detection module 120 And a control unit (140)

Generally, a plurality of wheels 10 of the vehicle are provided. In this embodiment, the wheel 10 includes an FR wheel 10FR provided on the front right side of the vehicle body 1, an FL wheel 10FL provided on the front left side, an RR wheel 10RR provided on the rear right side, And an RL wheel 10RL provided in the vehicle. Depending on the embodiment, the wheels 10 may be provided in various numbers.

The tire 20 is mounted on the outer periphery of the wheel 10 of the vehicle and is formed of a rubber material. The tire (20) is mounted on the rim of the wheel (10). A plurality of tires 20 are provided and in this embodiment the tire 20 comprises an FR tire 20FR provided on the front right side of the vehicle body 1, an FL tire 20FL provided on the front left side, And includes an RR tire 20RR and a rear left RL tire 20RL. The FR tire 20FR is included in the FR wheel 10FR and the FL tire 20FL is included in the FL wheel 10FL and the RR tire 20RR is included in the RR wheel 10RR and the RL tire 20RL, Is included in the RL wheel 10RL.

The tire pressure sensing module 120 senses the pressure and / or temperature of the tire 20 to determine the degree of air pressure of the tire 20. The tire pressure sensing module 120 can sense pressure, temperature, and other information that can calculate the air pressure of the tire 20 or determine the degree of the air pressure. In the present embodiment, 20). ≪ / RTI >

The tire pressure sensing module 120 may be installed at various positions of the wheel 10, such as the rim of the wheel 10 or the side of the tire 20. The tire pressure sensing module 120 includes an FR tire pressure sensing module 120FR provided on the front right side of the vehicle body 1, An FL tire pressure sensing module 120FL, an RR tire pressure sensing module 120RR provided on the rear right side, and an RL tire pressure sensing module 120RL provided on the rear left side. In the present embodiment, the FR tire pressure sensing module 120FR senses the pressure and temperature of the FR tire 20FR, the FL tire pressure sensing module 120FL senses the pressure and temperature of the FL tire 20FL, The tire pressure sensing module 120RR senses the pressure and temperature of the RR tire 20RR and the RL tire pressure sensing module 120RL senses the pressure and temperature of the RL tire 20RL.

The tire pressure sensing module 120 senses the centripetal acceleration of the wheel 10 along with the pressure and / or temperature of the tire 20. Each of the plurality of tire pressure sensing modules 120 has a unique identifier that is a unique number different from the other tire pressure sensing modules 120. The plurality of tire pressure sensing modules 120 may transmit tire information including a pressure value and / or temperature value of each of the sensed tires 20, a unique identifier, and the like to the tire information reception module 150).

The tire pressure sensing module 120 extracts a table number matching with the centripetal acceleration value of the wheel 10 sensed in the predetermined acceleration table and outputs the pressure value or temperature value of the sensed tire 20 and the tire number Information is transmitted. A detailed description of the tire pressure sensing module 120 will be described later with reference to FIG.

The wheel rotation detection module 130 senses the rotation speed of the wheel 10. [ The wheel rotation detection module 130 is provided in the wheel 10 or the vehicle body 1 to sense the rotation speed of the wheel 10 in various ways.

In this embodiment, teeth are formed on the disk 30 of the wheel 10 rotating together with the tire 20, and the wheel rotation detection module 130 senses the passage of the teeth of the disk 30, ) Is calculated. The wheel rotation detection module 130 provides a signal for detecting when the teeth of the disk 30 pass, and the wheel rotation detection module 130 generates a pulse when the teeth pass by and when they pass through the toothless portion do. In the present embodiment, the rotation speed of the wheel 10 is calculated from the number of pulses generated by the wheel rotation detection module 130 for a unit time. Various sensors such as an optical sensor, an induction sensor, or a Hall effect sensor that can detect the passage of the teeth can be used as the sensor of the wheel rotation detection module 130.

The wheel rotation sensing module 130 may be separately provided for the tire pressure sensing system 100, but is preferably part of an anti-lock brake system (ABS) of a vehicle in general.

The wheel rotation detection module 130 includes a wheel rotation detection module 130FR provided on the front right side of the vehicle body 1, An FL wheel rotation detection module 130FL, an RR wheel rotation detection module 130RR provided on the rear right side, and an RL wheel rotation detection module 130RL provided on the rear left side. In addition, a plurality of discs 30 are provided, and the disc 30 includes an FR disc 30FR provided on the front right side of the vehicle body 1, an FL disc 30FL provided on the front left side, An RR disc 30RR and a rear left RL disc 30RL. The FR wheel rotation detection module 130FR detects the rotation speed of the FR disk 30FR of the FR wheel 10FR and the FL wheel rotation detection module 130FL detects the rotation speed of the FL disk 30FL of the FL wheel 10FL, The RR wheel rotation detection module 130RR detects the rotation speed of the RR disk 30RR of the RR wheel 10RR and the RL wheel rotation detection module 130RL senses the rotation speed of the RL disk 10RL ).

The plurality of wheel rotation detection modules 130 transmit the rotational speeds of the plurality of wheels 10 to the control unit 140. Each of the plurality of wheel rotation detection modules 130 is connected to the control unit 140 in a wired manner. Each of the plurality of wheel rotation detection modules 130 is preferably connected to the control unit 140 via a Controller Area Network (CAN) bus.

The tire information receiving module 150 wirelessly receives the tire information transmitted by the tire pressure sensing module 120. [ The tire information receiving module 150 is provided in the vehicle body 1 and receives respective pieces of tire information from a plurality of tire pressure sensing modules 120. The tire information receiving module 150 is wired to the control unit 140 and transmits the received tire information to the control unit 140. The tire information receiving module 150 may be included in the control unit 140 according to an embodiment.

The control unit 140 receives the rotation speed of each of the plurality of wheels 10 from the plurality of wheel rotation detection modules 130. The control unit 140 stores the rotational speed of each of the plurality of wheels 10 transmitted from an arbitrary point in time for each viewpoint.

The control unit 140 determines the position of the tire pressure sensing module 120 based on the rotational speed of the wheel 10 transmitted from the wheel rotation sensing module 130 and the table number of the tire information received from the tire information receiving module 150 .

The control unit 140 may be separately provided for the tire pressure sensing system 100 but is preferably an electronic control unit (ECU) for controlling the state of an engine, an automatic transmission, an ABS, Do.

The control unit 140 determines whether the tire information received from the tire information receiving module 150 is transmitted from the tire pressure sensing module 120 among the plurality of tire pressure sensing modules 120 and stores the information. The control unit 140 determines which of the FR tire 20, the FL tire 20, the RR tire 20 and the RL tire 20 is the tire information.

The control unit 140 determines whether or not the unique identifier included in the tire information is the FR tire pressure detection module 120FR, the FL tire pressure detection module 120FL, the RR tire pressure detection module 120RR and the RL tire pressure detection module 120RL Determines which tire pressure detection module (120) is a unique identifier, and stores it.

A detailed description of the position allocation method of the control unit 140 will be described later with reference to FIG.

FIG. 2 is a block diagram of a tire pressure sensing module according to an embodiment of the present invention. FIG. 3 is a diagram illustrating an arrangement of a tire pressure sensing module according to an embodiment of the present invention. 5 is a diagram showing an acceleration table stored in a tire pressure sensing module according to an embodiment of the present invention, and FIG. 5 is a view showing a table of acceleration stored in a tire pressure sensing module according to an embodiment of the present invention. 6 is a diagram showing a configuration of tire information according to an embodiment of the present invention.

A tire pressure sensing module 120 according to an embodiment of the present invention includes a pressure sensing sensor 121 for sensing the pressure and / or temperature of the tire 20, a centripetal acceleration sensor 130 for sensing the centripetal acceleration of the wheel 10, A pressure sensor 123 for extracting a table number matching a centripetal acceleration value sensed by the centripetal acceleration sensor 122 in a predetermined acceleration table, And a pressure sensing transmission unit 124 wirelessly transmitting tire information including a pressure value or a temperature value and the table number.

The pressure sensing sensor 121 senses the pressure and / or temperature of the tire 20. The pressure sensing sensor 121 measures the pressure and / or temperature of the tire 20 in various manners to measure the air pressure of the tire 20. The pressure value and / or the temperature value of the tire 20 measured by the pressure sensing sensor 121 is transmitted to the pressure sensing controller 123 and converted into an analog signal from a digital signal.

The centripetal acceleration sensor 122 senses the centripetal acceleration of the wheel 10. Referring to FIG. 3, the centripetal acceleration sensor 122 is provided in the radial direction of the wheel 10 to measure the centripetal acceleration. The centripetal acceleration sensor 122 measures the centripetal acceleration, which is the acceleration in the radial direction of the wheel 10.

As shown in FIG. 4, the centripetal acceleration sensor 122 outputs a centripetal acceleration value A whose value changes continuously as the wheel 10 rotates. As the wheel 10 rotates faster, the centripetal acceleration value A sensed by the centripetal acceleration sensor 122 gradually increases, and when the wheel 10 rotates slowly, the centripetal acceleration value A gradually decreases. That is, as shown in FIG. 4, the centripetal acceleration value A and the rotation speed S of the wheel 10 are proportional to each other at the same time, and the increase / decrease is also proportional.

The centripetal acceleration value sensed by the centripetal acceleration sensor 122 is transferred to the pressure sensing controller 123 and converted from an analog signal to a digital signal.

The pressure sensing battery 121 supplies power to the pressure sensing control unit 123, the pressure sensing sensor 121, the centripetal acceleration sensor 122 and the pressure sensing transmission unit 124. Since the tire pressure sensing module 120 can not be connected to the electric device of the vehicle by wire, it requires its own battery, so that the pressure sensing battery 121 is the power source of the tire pressure sensing module 120. The pressure sensing battery 121 senses its own voltage and transmits the sensed voltage value to the pressure sensing controller 123. The voltage value of the pressure sensing battery 121 is included in the tire information and transmitted to the control unit 140 so that the control unit 140 predicts the life of the pressure sensing battery 121. [

The pressure sensing transmission unit 124 wirelessly transmits the tire information to the tire information reception module 150. [ The pressure sensing transmitter 124 outputs the processed tire information as a radio frequency (RF) signal, which is processed by the pressure sensing controller 123.

The pressure sensing control unit 123 receives the pressure value and / or the temperature value of the tire 20 sensed by the pressure sensing sensor 121 and processes the tire pressure information and the tire information. The pressure sensing control unit 123 converts an analog signal corresponding to a pressure value and / or a temperature value of the tire 20 output from the pressure sensing sensor 121 into a digital signal. The pressure sensing controller 123 processes the pressure value and / or the temperature value into tire information so that the pressure sensing transmitter 124 can transmit the tire information.

The pressure sensing controller 123 stores a unique identifier. Preferably, the unique identifier is different for each tire pressure sensing module 120 and is preferably a number consisting of a combination of numbers. The pressure sensing control unit 123 processes the stored unique identifier into tire information and outputs the tire information.

The pressure sensing controller 123 stores a predetermined acceleration table. The pressure sensing controller 123 extracts a table number that matches the centripetal acceleration value sensed by the centripetal acceleration sensor 122 among the stored acceleration tables. The acceleration table is a table in which a plurality of centripetal acceleration values and a plurality of table numbers are matched as shown in Fig.

In this embodiment, when the centripetal acceleration value sensed by the centripetal acceleration sensor 122 is a3, the pressure sensing controller 123 extracts the table number 3.

The pressure sensing control unit 123 transmits the tire information including the extracted table number through the pressure sensing transmission unit 124.

The pressure sensing controller 123 preferably transmits tire information of different table numbers through the pressure sensing transmitter 124. [ When the centripetal acceleration sensor 122 senses the centripetal acceleration at a constant cycle, the sensed pressure sensing transmission unit 124 preferably transmits a plurality of tire information including a table number that matches each of the centripetal acceleration values to a plurality of times , It is preferable that the tire information including the previously transmitted table number is not transmitted.

The pressure sensing control unit 123 processes the tire information. The tire information includes a unique identifier stored in the pressure sensing controller 123, a pressure value and / or a temperature value sensed by the pressure sensor 121, a voltage value sensed by the battery 121, a table number, And may include various information.

Referring to FIG. 6, in the present embodiment, tire information is generated by sequentially processing a unique identifier, a pressure value, a voltage value, a temperature value, a table number, a retransmission count, and a checksum. According to the embodiment, the tire information may further include a vehicle type code indicating a vehicle type, a sensor mode indicating an operation mode of the sensor, sensor information indicating failure information of the sensor, and the like.

The unique identifier is a number stored in the pressure sensing controller 123 and has a 32-bit size. The pressure value is a value of 16 bits as a value for the pressure of the tire 20 sensed by the pressure sensing sensor 121 and transmitted to the pressure sensing controller 123. The voltage value is a 16-bit value as a value for the self-voltage sensed by the pressure sensing battery 121 and transmitted to the pressure sensing controller 123. The temperature value is a value of 16 bits as a value for the temperature of the tire 20 sensed by the pressure sensing sensor 121 and transmitted to the pressure sensing controller 123.

The table number is a value extracted from the acceleration table by the pressure sensing controller 123 and has a size of 16 bits.

The number of retransmissions is the number of retransmissions of tire information. The tire information receiving module 150 may not be able to receive the tire information transmitted by the pressure sensing transmission unit 124 due to various kinds of noise and other errors. Therefore, the pressure sensing control unit 123 determines that the remaining values excluding the retransmission times And repeatedly transmits the same tire information through the pressure sensing transmission unit 124. [

The number of retransmissions in the tire information is incremented by 1 every time transmission is performed. It is preferable that the tire information has a size of 8 bits. The retransmission count R is set according to the embodiment, and in the present embodiment, the tire information is repeated three times. Therefore, the number of retransmissions has a value from 0 to 2. The tire information is desirably retransmitted at regular time intervals, and the retransmission interval of the tire information in this embodiment is defined as t_repeat.

The checksum is a value for checking the integrity of the data and preferably has a size of 8 bits.

According to the embodiment, the order of the unique identifier, the pressure value, the voltage value, the temperature value, the table number, and the checksum included in the tire information may be changed and any one of the pressure value or the temperature value, , Or the number of retransmissions, or the checksum may be excluded.

FIG. 7 is a block diagram of a control unit according to an embodiment of the present invention, and FIG. 8 is a diagram illustrating a rotation speed table stored in a control unit according to an embodiment of the present invention.

The control unit 140 according to an embodiment of the present invention includes a rotation information processing unit 143 for receiving the rotation speed of each of the plurality of wheels 10 from the plurality of wheel rotation detection modules 130, A tire information processing unit 142 that receives the tire information received by the tire information receiving module 150 and processes the received tire information, a time calculating unit 144 that calculates a time or calculates a time displacement, and a tire information processing unit 142 And a control processing unit 141 for automatically allocating the position of the tire pressure sensing module 120 from the plurality of processed tire information and the rotation speed processed by the rotation information processing unit 143. [

The rotation information processing unit 143 receives the respective rotation speeds from the plurality of wheel rotation detection modules 130. The rotation information processing unit 143 stores the rotation speed transmitted from an arbitrary point in time. The rotation information processing unit 143 stores the rotation speed in accordance with the time information provided by the time computing unit 144. The rotation information processing unit 143 stores the rotation speed according to time and provides the rotation speed to the control processing unit 141. [

The tire information processing unit 142 calculates and stores the transmission time of the tire information received from the tire information receiving module 150, and stores the table number included in the tire information.

The time calculator 144 may include a resonance circuit to calculate the current time from the reference time or to calculate the time displacement between different points of time. The time calculator 144 provides time information to the rotation information processor 143 so that the rotational speed of each of the plurality of wheels 10 can be stored according to time. The time computing unit 144 provides the time information to the tire information processing unit 142 so as to calculate the transmission time of the tire information.

Hereinafter, the transmission time calculation method of the tire information processing unit 142 will be described.

Generally, the delay is constant when transmitting / receiving via radio. In this embodiment, when each of the plurality of tire pressure sensing modules 120 transmits tire information to the tire information receiving module 150, the delay is constant. The transmission / reception delay, which is a time interval between the time when the pressure sensing module 120 is transmitted and the time when the tire information receiving module 150 receives the signal, is set to t_delay.

Since the pressure sensing module 120 retransmits the tire information of only the number of times of retransmission at regular intervals, the initial transmission time of tire information having the same remaining value except for the number of retransmissions is calculated according to the number of retransmissions. In this embodiment, the retransmission interval of the tire information is t_repeat.

The tire information processing unit 142 calculates the transmission time of the tire information by subtracting the transmission / reception delay from the time when the tire information is received and the time interval due to the retransmission. The time interval according to the retransmission is a value obtained by multiplying the number of retransmissions by the retransmission interval. Since the tire information is retransmitted at regular intervals, the transmission / reception delay is multiplied by the number of retransmissions to calculate the transmission / reception delay based on the retransmission.

When the number of retransmissions included in the tire information is R and the time when the tire information is received is t_receive, the transmission time t_send of the tire information is calculated as follows.

Transmission time t_send = t_receive - (t_delay * R) - (t_repeat * R)

The tire information processing unit 142 calculates the transmission time of the tire information received by the tire information receiving module 150 by the above-described method. The control processing unit 141 calls the rotation speed of each of the plurality of wheels 10 at the computed transmission time from the rotation information processing unit 143. [

The control processing unit 141 automatically assigns the position of the tire pressure sensing module 120 by matching the table number of the tire information and the rotational speed of each of the plurality of wheels 10 transmitted from the wheel rotation sensing module 130. [

The control processing unit 141 stores a rotation speed table in which a plurality of rotational speeds proportional to a plurality of centripetal acceleration values of the acceleration table stored in the pressure sensing control unit 123 and a plurality of table numbers are matched. The rotation speed table is a table in which a plurality of rotation speeds and a plurality of table numbers are matched as shown in FIG. The plurality of rotational speeds of the rotational speed table are respectively proportional to the plurality of centripetal acceleration values of the acceleration table stored in the pressure sensing controller 123. [

The control processing unit 141 extracts the rotation speed matching with the table number included in the tire information transmitted from the tire information processing unit 142 in the stored rotation speed table. The control processing unit 141 matches the extracted rotation speed with the rotation speed of each of the plurality of wheels 10 received from the wheel rotation detection module 130.

The control processing unit 141 assigns the position of the tire pressure sensing module 120 to the wheel 10 that first enters the rotational speed extracted from the rotational speed table.

The control processing unit 141 repeats the above-described process every time a plurality of pieces of tire information having different table numbers are received and statistically processes the table numbers by matching with the rotational speed of each of the plurality of wheels 10, It is preferable to allocate the position of the tire pressure sensing module 120 to the wheel 10 that has the best matching result as a result of statistical processing.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It should be understood that various modifications may be made by those skilled in the art without departing from the spirit and scope of the present invention.

Claims (9)

A centripetal acceleration sensor for sensing a centripetal acceleration of the wheel;
A pressure sensing sensor for sensing pressure or temperature of the tire;
A pressure sensing controller for extracting a table number matching a centripetal acceleration value sensed by the centripetal acceleration sensor from a predetermined acceleration table; And
A pressure value or temperature value of the tire sensed by the pressure sensor, and a table number,
The pressure sensing transmission unit retransmits the tire information,
Wherein the tire information includes a pressure sensing transmission unit for transmitting tire information including a number of retransmissions that is the number of retransmissions of the tire information. The method according to claim 1,
Wherein the centripetal acceleration value is proportional to the rotational speed of the wheel. The method according to claim 1,
Wherein the acceleration table matches a plurality of centripetal acceleration values and a plurality of table numbers, respectively. The method according to claim 1,
And the pressure sensing transmission unit transmits a plurality of tire information including different table numbers. The method according to claim 1,
Wherein the tire information further includes a unique identifier. The method according to claim 1,
Further comprising a pressure sensing battery for supplying power to the centripetal acceleration sensor, the pressure sensing module, the pressure sensing control unit, and the pressure sensing transmission unit,
Wherein the tire information further includes a voltage value of the pressure sensing battery. A table number matching the centripetal acceleration value sensed by the centripetal acceleration sensor is extracted from a preset acceleration table, and the pressure value or the temperature value of the tire detected and the table number A tire pressure sensing module for transmitting the tire information including the tire pressure information;
A wheel rotation sensing module for sensing a rotation speed of each of the plurality of wheels;
A tire information receiving module for receiving the tire information transmitted from the tire pressure sensing module; And
And a control unit for automatically assigning the position of the tire pressure sensing module by matching the table number of the tire information with the rotation speed of each of the plurality of wheels transmitted from the wheel rotation sensing module,
Wherein when the tire information receiving module can not receive the tire information, the tire pressure detecting module retransmits the tire information,
Wherein the tire information further includes a retransmission number that is a number of retransmissions of the tire information. 8. The method of claim 7,
Wherein the acceleration table matches a plurality of centripetal acceleration values and a plurality of table numbers,
Wherein the control unit stores a rotation speed table in which a plurality of rotational speeds proportional to a plurality of centripetal acceleration values of the acceleration table and the plurality of table numbers are matched. 9. The method of claim 8,
Wherein the control unit matches the rotational speed matching the table number in the rotational speed table with the rotational speed of each of the plurality of wheels.

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