KR101512400B1

KR101512400B1 - Tire Pressure Monitoring System and Method for Performing Auto-location thereof

Info

Publication number: KR101512400B1
Application number: KR1020130159976A
Authority: KR
Inventors: 김경택
Original assignee: 현대오트론 주식회사
Priority date: 2013-12-20
Filing date: 2013-12-20
Publication date: 2015-04-22

Abstract

Provided in the present invention is a tire pressure sensing system which comprises a tire pressure sensing module formed on a wheel or tire to measure tire pressure and wheel phase angle to select the random location of phase angle, and transmitting data including first wheel phase angle information showing identification code and random location of phase angle, and waiting time information needed to reach a random location of phase angle from a present phase angle location; a wheel rotation sensing module formed on an vehicle body, measures rotation of a wheel to provide second wheel phase angle information; and a control unit receiving data from the tire pressure sensing module, and receiving second wheel phase angle information at standard time of adding waiting time to time of transmitting data to compare the first wheel phase angle information and the second wheel phase angle information to find the location of the wheel in which the tire pressure sensing module is installed, thereby having an effect of simply finding location of the tire pressure sensing module on a direct tire pressure sensing system and simply checking, and reducing battery consumption by reducing power waiting time by directly transmitting data from the wheel rotation sensing module without waiting time.

Description

Technical Field [0001] The present invention relates to a tire pressure detection system and a tire position automatic allocation method,

The present invention relates to a tire pressure sensing system and a tire position automatic allocation method, and more particularly, to a tire pressure sensing system capable of assigning a position of a tire pressure sensing module, which measures pressure of a tire to a control unit, And a method of automatically allocating a tire position.

Recently, vehicles are equipped with a tire pressure monitoring system (TPMS) that detects the decrease in air pressure of a tire mounted on a vehicle and informs the driver.

If the air pressure of the tire is low, the vehicle may slip easily, leading to a major accident, fuel consumption is increased, fuel economy is deteriorated, tire life is shortened, and ride comfort and braking power are also reduced.

The Tire Pressure Monitoring System (TPMS) allows the driver to be informed of the pressure drop in the tire, thereby checking the pressure of the tire to prevent this problem in advance.

Tire pressure sensing systems can be largely classified into direct and indirect methods. The indirect method is a method of estimating the tire air pressure from the rotation information of the tire, and the direct method is a method of directly measuring the tire air pressure by providing a pressure sensor inside the tire wheel.

In a direct tire pressure sensing system, the tire pressure measured from a tire pressure sensing module mounted on a wheel or tire is transmitted wirelessly to indicate the tire pressure drop.

At this time, there is a problem that it is not possible to determine from which wheel the pressure information of the tire received wirelessly is transmitted from the tire pressure sensing module when the wheel or the tire is firstly mounted, replaced, or changed in position.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above problems, and it is an object of the present invention to provide a tire pressure sensing system and a tire position automatic allocation method capable of automatically determining the position of a tire pressure sensing module in a direct- The purpose of that is to do.

According to an aspect of the present invention, there is provided a method for controlling a wheel, comprising: measuring a pressure and a wheel phase angle of a tire or a wheel, selecting an arbitrary phase angle position and determining a first wheel phase A tire pressure sensing module that transmits data including each information and latency time information required to reach the arbitrary phase angle position at the current phase angle position; A wheel rotation detection module provided in the vehicle body and measuring the rotation of the wheel to provide second wheel phase angle information; And a controller for receiving the data from the tire pressure sensing module and receiving the second wheel phase angle information at a reference time obtained by adding the waiting time at the time of transmitting the data, And a control unit for determining the position of the wheel on which the tire pressure sensing module is mounted by comparing the wheel phase angle information with each other.

Wherein the control unit calculates a first phase angle displacement which is a difference between the first wheel phase angle information and the first wheel phase angle information from the data sequentially transmitted from the tire pressure sensing module, Calculates a second phase angular displacement from the second wheel phase angle information at a reference time plus the waiting time at a time when the first phase angular displacement and the second phase angular displacement are sequentially matched The wheel is discriminated as a wheel on which the tire pressure sensing module is mounted, and the identification code transmitted from the tire pressure sensing module is given to the wheel.

Wherein the tire pressure sensing module divides the phase angle of the wheel into a plurality of phases and assigns phase angle numbers to the divided positions, selects any one of the divided angular positions, And transmits the data including the phase angle number, the identification code, and the waiting time information to the control unit as the wheel phase angle information.

Wherein the tire pressure sensing module stores a transmission pattern table in which a phase angle number is assigned to each divided position by dividing a phase angle of the wheel into a plurality of phases and randomly arranges the phase angle numbers, Wherein the first wheel phase angle information includes transmission pattern information indicating a phase angle number selected in the transmission pattern table and data including the identification code and the waiting time information To the control unit.

The tire pressure sensing module includes: a pressure sensor for measuring a pressure of the tire; A phase angle sensor for measuring a phase angle of the wheel; A pressure sensing transmitter for wirelessly transmitting the data; And a pressure sensing controller for receiving the information from the pressure sensor and the phase angle sensor to generate the data and controlling the pressure sensing transmitter to transmit the data.

The phase angle sensor may be provided as an acceleration sensor.

The wheel rotation detection module may be a wheel speed sensor of an anti-lock brake system (ABS).

Wherein the control unit comprises: a tire information processing unit for receiving the data from the tire pressure sensing module and storing the data, and calculating the reference time plus the waiting time at the time of transmitting the data; A rotation information processing unit for receiving the second wheel phase angle information of each wheel from the wheel rotation detection module, storing and processing the second wheel phase angle information; And a controller for receiving the first wheel phase angle information from the tire information processing unit and receiving the second wheel phase angle information at the reference time from the rotation information processing unit, And a control processor for automatically comparing the position of the tire pressure sensing module with each other.

According to another aspect of the present invention, there is provided a tire pressure sensing module for a tire or a wheel, comprising: measuring pressure and wheel phase angle of a tire; And a second wheel phase angle information indicating an arbitrary phase angle position and a waiting time information required to reach the arbitrary phase angle position at a current phase angle position, Transmitting; Receiving second wheel phase angle information at a reference time obtained by adding the waiting time at a time when the data is transmitted from a wheel rotation detecting module provided in a vehicle body and measuring the rotation of the wheel; And comparing the first wheel phase angle information with the second wheel phase angle information to determine a position of the wheel on which the tire pressure sensing module is mounted.

Wherein the step of determining the position of the wheel equipped with the tire pressure sensing module calculates a first phase angle displacement from the first wheel phase angle information sequentially transmitted from the tire pressure sensing module, Calculating a second phase angular displacement from the second wheel phase angle information of each wheel at the reference time corresponding to the phase angle information, wherein the first phase angular displacement and the second phase angular displacement are sequentially matched Can be identified by the wheel on which the tire pressure sensing module is mounted.

Wherein the step of transmitting the data comprises the steps of dividing the phase angle of the wheel into a plurality of phases and giving phase angle numbers to the divided positions, selecting an arbitrary position among the divided positions, And transmits the data including the phase angle number, the identification code, and the waiting time information as one-wheel phase angle information.

Wherein the step of transmitting the data includes storing a transmission pattern table in which a phase angle number is assigned to each divided position by dividing the phase angle of the wheel into a plurality of phases and randomly arranging the phase angle numbers, Selecting one of the phase angle numbers as the first wheel phase angle information and transmitting the transmission pattern information indicating the phase angle number selected in the transmission pattern table as the first wheel phase angle information and the data including the identification code and the waiting time information Can be transmitted.

According to the tire pressure sensing system and the tire position automatic allocation method of the present invention, the position of the tire pressure sensing module can be simply discriminated and automatically allocated in the direct tire pressure sensing system.

In addition, since the wheel rotation detection module can transmit data immediately without waiting time, the power standby time is reduced and battery consumption can be reduced.

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 showing the configuration of the tire pressure sensing module of FIG.
FIG. 3 is a view showing a transmission position resolution of the tire pressure sensing module of FIG. 1. FIG.
4 is a diagram showing a transmission pattern table.
5 is a block diagram showing the configuration of the control unit of Fig.
6 is a flowchart of a method of automatically allocating a tire position according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. In addition, the preferred embodiments of the present invention will be described below, but it is needless to say that the technical idea of the present invention is not limited thereto and can be variously modified by those skilled in the art.

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

Referring to FIG. 1, a tire pressure sensing system 100 according to an embodiment of the present invention includes a tire pressure sensing module 120, a wheel rotation sensing module 130, and a control unit 140.

A plurality of wheels 10 of the vehicle are provided. In this embodiment, the wheel 10 includes a right front wheel 10FR, a left front wheel 10FL, a right rear wheel 10RR, and a left rear wheel 10RL. 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). The tire 20 is provided on each wheel 10 and the tire 20 corresponds to the wheel 10 and includes an FR tire 20FR provided on the front right side of the vehicle body 1, An RL tire 20RR provided on the rear right side, and an RL tire 20RL provided on the rear left side.

The tire pressure sensing module 120 is provided on the wheel 10 or the tire 20 to sense the pressure and / or temperature of the tire 20 for determining the degree of air pressure of the tire 20, Lt; / 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 is provided on each of the plurality of wheels 10 to sense the pressure of each tire 20 and the phase angle of each wheel 10. [

Each of the plurality of tire pressure sensing modules 120 has an identification number that is a unique number different from the other tire pressure sensing modules 120.

The plurality of tire pressure sensing modules 120 each include a plurality of tire pressure sensing modules 120 that respectively select an arbitrary phase angular position and determine a pressure value and / or temperature value of the sensed tire 20, an identification code, a first wheel phase angle Information, and latency time information required to reach the arbitrary phase angle position at the current phase angle position, to the control unit 140 wirelessly.

At this time, the tire pressure sensing module 120 transmits data at the current phase angular position without waiting time. Therefore, power consumption can be reduced by eliminating the power standby time required to reach an arbitrary phase angular position.

The arbitrary phase angular positions selected by the tire pressure sensing module 120 are randomly changed, and the tire pressure sensing module 120 generates an identification signal for each of the changed phase angular positions, Phase angle information, and latency time information required to reach the arbitrary phase angle position at the current phase angle position.

2, the tire pressure sensing module 120 includes a pressure sensing sensor 121, a phase angle sensor 122, a pressure sensing transmission unit 123, a pressure sensing control unit 124, And a battery 125.

The pressure sensing sensor 121 measures the pressure and / or temperature of the tire. 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 control unit 124 and is converted from an analog signal to a digital signal.

The phase angle sensor 122 measures the phase angle of the wheel 10. The phase angle sensor 122 preferably calculates the correct phase angle from the reference point during the rotation of the wheel 10, but it is also possible to measure the phase angle displacement during the set time during the rotation of the wheel 10 according to the embodiment, A signal can be output when a specific phase angle is reached when the motor 10 rotates.

The phase angle sensor 122 can output an electrical signal in response to a change in gravity, an electrical signal in response to a change in acceleration, or a signal in response to a ground impact.

Various sensors such as a piezoelectric sensor, an acceleration sensor, or an impact sensor may be used as the phase angle sensor 122 according to a signal output method.

In this embodiment, the phase angle sensor 122 is an acceleration sensor that is installed in the gravity direction and outputs an electrical signal in accordance with a change in gravity. The phase angle sensor 122 outputs a continuously varying signal similar to a sinusoidal curve as the wheel 10 rotates.

Referring to FIG. 3, the tire pressure sensing module 120 is provided in the radial direction of the wheel 10 to measure the acceleration in the gravity direction. The tire pressure sensing module 120 measures acceleration in the radial direction of the wheel 10, but outputs only the gravity direction acceleration component excluding the acceleration component due to the motion of the vehicle.

When the tire pressure sensing module 120 is at the highest point of the wheel 10, the gravity is maximized and the phase angle sensor 122 outputs the minimum value, and when the lowest point of the wheel 10 is present, And the phase angle sensor 122 outputs a maximum value.

Therefore, when the phase angle sensor 122 outputs the minimum value during the rotation of the wheel 10, the phase angle P is 0 degree, the phase angle P is 90 degrees when the intermediate value is outputted, and the phase Each P is 180 degrees, and 270 degrees when outputting the intermediate value again. The phase angle P can be calculated according to the continuous output value of the phase angle sensor 122. [

The signal output from the phase angle sensor 122 is transmitted to the pressure sensing controller 124 and converted from an analog signal to a digital signal.

The pressure sensing transmitter 123 receives the pressure value of the tire 20, the identification code, the first wheel phase angle information indicative of the arbitrary phase angle position, and the second wheel phase angle information indicative of the atmospheric pressure required to reach the arbitrary phase angle position And wirelessly transmits data including time information to the control unit 140. [ The pressure sensing transmitter 123 outputs the processed data in the pressure sensing controller 124 as a coded radio frequency (RF) signal.

The pressure sensing control unit 124 receives the pressure value and / or temperature value of the tire 20 sensed by the pressure sensing sensor 121 and receives information indicating the phase angle of the wheel 10 from the phase angle sensor 122 The first wheel phase angle information indicating the pressure value of the tire 20, the identification sign arbitrary phase angle position, and the waiting time information required to reach the arbitrary phase angle position at the current phase angle position, . The generated data is transmitted to the control unit 140 via the pressure sensing transmission unit 123. [

In this embodiment, the pressure sensing control unit 124 divides the phase angle of the wheel 10 into a plurality of phases, and assigns phase angle numbers to the divided positions. The pressure sensing control unit 124 selects an arbitrary position among the divided positions, calculates a phase angle number (first wheel phase angle information) for the selected position, an arbitrary phase angle position To the control unit 140 via the pressure-sensing transmission unit 123. The control unit 140 controls the pressure-sensing transmission unit 123 so that the pressure-sensing transmission unit 123 receives the data.

Referring to FIG. 3, in this embodiment, the phase angle of the wheel 10 is equally divided into eight, and phase angle numbers from 0 to 7 are assigned to the divided positions. At this time, the phase angle difference of the wheel 10 between each phase angle number is 45 degrees.

The pressure sensing control unit 124 generates a random number between 0 and 7 using a random variable and selects a phase angle number represented by the generated number to calculate a tire pressure value, Generates data including the phase angle number selected as the information and the waiting time information required to reach the selected phase angle position at the current phase angle position and transmits the data through the pressure sensing transmission unit 123. The selected phase angle number is changed randomly.

Meanwhile, the pressure sensing controller 124 of the present embodiment may store a transmission pattern table in which phase angle numbers are randomly arranged.

Each of the phase angle numbers in the transmission pattern table can be represented by transmission pattern information.

4 is an example of a transmission pattern table to which a transmission pattern number for a plurality of transmission patterns and a phase angle number of each transmission pattern are given. In the present embodiment, five phase angle numbers are set for each transmission pattern, and four transmission patterns are set for a plurality of transmission patterns. 4 is given a transmission pattern number from 0 to 3.

A phase angle number of [0, 2, 5, 1, 7] is set as the second transmission pattern to which the transmission pattern number 1 is assigned. When the second transmission pattern is calculated by the phase angle of the wheel 10, [0 degrees, 90 degrees, 225 degrees, 45 degrees, 315 degrees] is obtained.

The pressure sensing control unit 124 arbitrarily selects one transmission pattern among the transmission patterns and transmits transmission pattern information as first wheel phase angle information and current phase information as the first wheel phase angle information to the position indicated by the phase angle number according to each phase angle number listed in the transmission pattern To the control unit 140, data including the idle time information and the identification code necessary to reach the selected phase angle position at each position.

The transmission pattern information includes transmission pattern numbers of the selected transmission patterns and order information that is a sequence of phase angle numbers at the time when the tire information is transmitted in the selected transmission pattern. That is, the transmission pattern information is a combination of the transmission pattern number and the order information of the phase angle number.

Referring to FIG. 4, when the selected transmission pattern is the second transmission pattern and the phase information is the phase angle number 5, which is the third phase angle number in the second transmission pattern, the transmission pattern information is [13] when the tire information is transmitted. When the transmission pattern information is [24], it can be seen that the selected transmission pattern is the third transmission pattern and the phase angle number at the time when the tire information is transmitted is 5, which is the fourth phase angle number of the third transmission pattern.

At this time, a transmission pattern table identical to the transmission pattern table stored in the pressure sensing controller 124 is stored in the control unit 140, and based on the transmission pattern information transmitted from the pressure sensing controller 124 of the tire pressure sensing module 120, The phase angle of the light source 10 can be calculated.

The pressure sensing battery 125 supplies power to the pressure sensing control unit 124, the pressure sensing sensor 121, the phase angle sensor 122 and the pressure sensing transmission unit 123.

The wheel rotation detection module 130 detects rotation information (second wheel phase angle information) of the wheel 10 indicating the rotation degree of the wheel 10. The wheel rotation detection module 130 is provided in the vehicle body 1 and detects rotation information 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, As the rotation information. 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 number of pulses generated by the wheel rotation detection module 130 is the rotation information of the wheel 10. 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 teeth of the disk 30 have a predetermined number of teeth. The number of teeth may be changed according to the type of the vehicle or the wheel 10 so that the number of pulses generated by the wheel rotation sensing module 130 can be changed when the wheel 10 rotates one rotation. In this embodiment, 48 teeth of the disk 30 may be formed. Accordingly, the wheel rotation detection module 130 can generate 96 pulses when the wheel 10 rotates one turn.

The wheel rotation detection module 130 detects the number of teeth that have passed from an arbitrary point in time and outputs the number of pulses. If the number of pulses generated by the wheel rotation sensing module 130 when the wheel 10 is rotated one rotation is N_pul, the number of pulses output by the wheel rotation sensing module 130 N_sh is as follows.

Number of pulses N_sh = N_pul * (P / 360 degrees)

For example, when the wheel 10 is rotated by 45 degrees, the wheel rotation detection module 130 outputs 12 pulses.

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. That is, the wheel rotation detection module 130 may be a wheel speed sensor of the lock prevention brake system.

The wheel rotation detection module 130 is provided in the same manner as the number of the wheels 10 so as to correspond to each wheel 10, And detects rotation information.

The plurality of wheel rotation detection modules 130 transmit rotation information (second wheel phase angle information) of the respective 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 sensing modules 130 is preferably connected to the control unit 140 via a CAN (Controller Area Network) bus.

The control unit 140 receives the data from the tire pressure sensing module 120 and determines the time at which the tire pressure sensing module 120 receives the data from the wheel rotation sensing module 130, The second wheel phase angle information is received and the first wheel phase angle information and the second wheel phase angle information are compared with each other to determine the position of the wheel on which the tire pressure sensing module is mounted.

Specifically, the control unit 140 calculates a first phase angular displacement which is a difference between the first wheel phase angle information and the first wheel phase angle information from the data sequentially transmitted from the tire pressure sensing module 120, Calculating a second phase angular displacement from the second wheel phase angle information at a reference time obtained by adding a waiting time at a time when each data is transmitted, and calculating a second phase angular displacement at a time when the first phase angle displacement and the second phase angular displacement are sequentially matched The tire pressure sensing module 120 is discriminated as a wheel 10 mounted with the tire pressure sensing module 120 and the identification code transmitted from the tire pressure sensing module 120 is given to the wheel 10.

5 is a block diagram showing a configuration of a control unit according to an embodiment of the present invention.

5, the control unit 140 includes a tire information processing unit 141, a rotation information processing unit 142, and a control processing unit 143. [

The tire information processing unit 141 stores the data transmitted from the tire pressure sensing module 120 together with the transmission time. The tire information processing unit 141 calculates a reference time obtained by adding the waiting time at the time when the tire pressure sensing module 120 transmits the data.

The rotation information processing unit 142 receives the rotation information of each wheel 10 from the plurality of wheel rotation detection modules 130. The rotation information processing unit 142 integrates the rotation information (second wheel phase angle information) of the wheel 10 received from the wheel rotation detection module 130 at an arbitrary point in time and stores the information.

The control processing unit 143 receives the first wheel phase angle information and the reference time from the tire information processing unit 141 and receives the second wheel phase angle information from the rotation information processing unit 142 at the reference time, The position of the tire pressure sensing module 120 is discriminated by comparing the respective pieces of information with the second wheel phase angle information and the position of the tire pressure sensing module 120 is automatically allocated to each wheel 10. [

At this time, since the second wheel phase angle information input from the wheel rotation detection module 130 has no reference value, whether or not the first wheel phase angle information and the second wheel phase angle information are coincident is determined by comparing the phase angle displacements Whether or not the information is stored.

The control processor 143 calculates a first phase angular displacement that is a difference between the first wheel phase angle information and the first wheel phase angle information from the sequentially transmitted and stored data. And calculates a second phase angular displacement from the second wheel phase angle information at a reference time obtained by adding the waiting time at the time of transmitting each data. The control processing section 143 finds a case where the calculated first phase angular displacement and the second phase angular displacement at each wheel 10 coincide with each other so that the second phase angular displacement matches or substantially coincides with the first phase angular displacement The wheel 10 is determined as the wheel 10 to which the tire pressure sensing module 120 that has transmitted the data is mounted.

The control processor 143 assigns and stores the identification code of the tire pressure sensing module 120 to the wheel 10 determined to have the tire pressure sensing module 120 installed therein.

As described above, according to the tire pressure sensing system 100 of the present invention, the position of the tire pressure sensing module 120 can be simply determined and automatically allocated in the direct type tire pressure sensing system.

Also, since the wheel rotation detection module 130 can transmit data without waiting time, the power standby time can be reduced and battery consumption can be reduced.

Hereinafter, a method of automatically assigning a tire position according to an embodiment of the present invention will be described with reference to the accompanying drawings. However, the description of the same things as those described in the tire pressure sensing system 100 according to the embodiment of the present invention will be omitted.

6 is a flowchart illustrating a method of automatically assigning a tire position according to an exemplary embodiment of the present invention.

6, a method of automatically assigning a tire position according to an embodiment of the present invention is a method for automatically assigning a tire position to a tire pressure sensing module 120 provided on a wheel 10 or a tire 20, (S100), the tire pressure sensing module 120 selects an arbitrary phase angle position and outputs first wheel phase angle information indicating an identification code, an arbitrary phase angle position, (S200) for transmitting data including waiting time information required to reach the phase angular position, a wheel rotation detecting module (130) provided in the vehicle body for measuring the rotation of the wheel (10) (S300) of receiving second wheel phase angle information at a reference time obtained by adding a waiting time at a time when the data is transmitted, comparing the first wheel phase angle information and the second wheel phase angle information, When the pressure sensing module 120 is mounted And a step (S400) for determining the position of the wheel 10.

In step S400 of determining the position of the wheel 10 mounted with the tire pressure sensing module 120, the first phase angle displacement is calculated from the first wheel phase angle information sequentially transmitted from the tire pressure sensing module 120 And calculates a second phase angular displacement from the second wheel phase angle information of each wheel 10 at a reference time corresponding to each first wheel phase angle information, and calculates a first phase angular displacement and a second phase angle The wheel 10 whose displacements are sequentially matched is discriminated as the wheel 10 to which the tire pressure sensing module 120 is mounted.

In step S200 of transmitting data, the phase angle of the wheel 10 is divided into a plurality of phases, phase angle numbers are assigned to the divided positions, an arbitrary position among the divided positions is selected, And data including the phase angle number, the identification code, and the waiting time information as the first wheel phase angle information.

Alternatively, in the step of transmitting data (S200), a phase angle number is assigned to each divided position of the wheel 10 by dividing the phase angle of the wheel 10, a transmission pattern table in which phase angle numbers are arbitrarily stored, The control unit selects an arbitrary phase angle number among the phase angle numbers stored in the pattern table to generate transmission pattern information indicating the phase angle number selected in the transmission pattern table as the first wheel phase angle information and data May be transmitted.

Since the operation of each step is the same as that described in the tire pressure sensing system 100 according to the embodiment of the present invention, detailed description thereof will be omitted.

As described above, according to the tire position automatic allocation method of the present invention, the position of the tire pressure sensing module 120 can be simply determined and automatically allocated in the direct tire pressure sensing system, The data can be transmitted immediately without waiting time, thereby reducing the power standby time and reducing battery consumption.

It will be apparent to those skilled in the art that various modifications, substitutions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. will be. Therefore, the embodiments disclosed in the present invention and the accompanying drawings are intended to illustrate and not to limit the technical spirit of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments and the accompanying drawings . The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

100: tire pressure sensing system
10: Wheel
20: Tire
30: Disk
120: Tire Pressure Sensing Module
130: Wheel rotation detection module
140: control unit

Claims

A wheel or a tire, measuring a pressure and a wheel phase angle of the tire, dividing the phase angle of the wheel into a plurality of phases, assigning phase angle numbers to the divided positions, and arranging the phase angle numbers randomly, Selecting one of the phase angle numbers among the phase angle numbers stored in the transmission pattern table to generate transmission pattern information indicating a phase angle number selected in the transmission pattern table as first wheel phase angle information, A tire pressure sensing module for transmitting data including waiting time information required to reach an arbitrary phase angle position at a phase angular position;
A wheel rotation detection module provided in the vehicle body and measuring the rotation of the wheel to provide second wheel phase angle information; And
Receiving the data from the tire pressure sensing module and receiving the second wheel phase angle information at a reference time obtained by adding the waiting time at the time of transmitting the data, And a control unit for determining the position of the wheel on which the tire pressure sensing module is mounted by comparing the phase angle information with each other.

The method according to claim 1,
Wherein the control unit comprises:
Calculating a first phase angular displacement that is a difference between the first wheel phase angle information and the first wheel phase angle information from the data sequentially transmitted from the tire pressure sensing module, Calculating a second phase angular displacement from the second wheel phase angle information at a reference time plus the waiting time, and calculating a second phase angular displacement based on the tire pressure Wherein the tire pressure detection module determines a wheel equipped with the detection module and gives the identification code transmitted from the tire pressure detection module to the wheel.

delete

The method according to claim 1,
The tire pressure sensing module includes:
A pressure sensor for measuring a pressure of the tire;
A phase angle sensor for measuring a phase angle of the wheel;
A pressure sensing transmitter for wirelessly transmitting the data; And
And a pressure sensing controller for receiving the information from the pressure sensor and the phase angle sensor to generate the data and to control the pressure sensing transmitter to transmit the data.

6. The method of claim 5,
Wherein the phase angle sensor is provided as an acceleration sensor.

The method according to claim 1,
Wherein the wheel rotation sensing module is a wheel speed sensor of an anti-lock braking system (ABS).

The method according to claim 1,
Wherein the control unit comprises:
A tire information processing unit for receiving the data from the tire pressure sensing module and storing the data and calculating the reference time added with the waiting time at the time of transmitting the data;
A rotation information processing unit for receiving the second wheel phase angle information of each wheel from the wheel rotation detection module, storing and processing the second wheel phase angle information; And
The first wheel phase angle information is received from the tire information processing unit and the second wheel phase angle information is received from the rotation information processing unit at the reference time, and the first wheel phase angle information and the second wheel phase angle And a control processor for automatically comparing the position of the tire pressure sensing module with the information of the tire pressure sensing module.

Measuring a tire pressure and the wheel phase angle in a tire pressure sensing module provided on a wheel or a tire;
A transmission pattern table in which a plurality of phase angles of the wheel are divided and a phase angle number is assigned to each divided position and the phase angle numbers are randomly arranged; Number of the first wheel phase angle information, transmission pattern information indicating the phase angle number selected in the transmission pattern table as the first wheel phase angle information, and identification information and waiting time information required to reach an arbitrary phase angle position at the current phase angle position Transmitting data including the data;
Receiving second wheel phase angle information at a reference time obtained by adding the waiting time at a time when the data is transmitted from a wheel rotation detecting module provided in a vehicle body and measuring the rotation of the wheel; And
And comparing the first wheel phase angle information with the second wheel phase angle information to determine a position of the wheel on which the tire pressure sensing module is mounted.

10. The method of claim 9,
In the step of determining the position of the wheel on which the tire pressure sensing module is mounted,
Wherein the second wheel phase angle information is calculated by calculating a first phase angle displacement from the first wheel phase angle information sequentially transmitted from the tire pressure sensing module, Wherein the first phase angular displacement and the second phase angular displacement are sequentially determined as the wheel on which the tire pressure sensing module is mounted, How to assign locations automatically.

delete