KR101388622B1 - Tire pressure monitoring module, tire pressure monitoring system comprising the same, and method for performing auto-location of the same - Google Patents

Abstract

The present invention relates to a tire pressure monitoring module that can easily catch the position thereof, a tire pressure monitoring system including the same, and a method for performing auto-location of the same. The tire pressure monitoring module according to an embodiment of the present invention includes a phase angle sensor detecting a phase angle of a wheel; a pressure detecting sensor detecting pressure or temperature of a tire; a pressure detection control unit storing a unique identifier, determining a first transmission position among transmission position resolutions, of which the wheel is uniformly divided by a preset division value, by the unique identifier, and determining a second transmission position by the first transmission position; and a pressure detection transmitting unit transmitting first tire information including the detected pressure and temperature values of the tire and the unique identifier when the phase angle of the wheel detected by the phase angle sensor is the first transmission position, and the unique identifier, and transmitting second tire information including the detected pressure and temperature values of the tire and the unique identifier when the phase angle of the wheel detected by the phase angle sensor is the second transmission position, and the unique identifier. [Reference numerals] (AA) Start; (BB) End; (S310) Detect phase angle of wheel and pressure and temperature of tire; (S320) Transmit first tire information including the pressure value and the temperature value of the tire at first transmission position, among transmission position resolutions, determined by unique identifier; (S330) Transmit second tire information including the pressure value and the temperature value of the tire at second transmission position, among transmission position resolutions, determined by unique identifier and the first transmission position

Description

Technical Field The present invention relates to a tire pressure sensing module, a tire pressure sensing system including the tire pressure sensing module, and a method of automatically assigning a position of the tire pressure sensing module.

The present invention relates to a tire pressure sensing module, a tire pressure sensing system including the same, and a method for automatically allocating a position of a tire pressure sensing module. More particularly, the tire pressure simply determines a position of a tire pressure sensing module and automatically assigns the tire pressure. The present invention relates to a sensing module, a tire pressure sensing system including the same, and a method for automatically allocating a tire pressure sensing module.

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 sensor system uses a wheel pressure sensor to measure the pressure and / or temperature inside the tire and send 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 simply identifying and automatically assigning a position of a tire monitoring module, a tire pressure sensing system including the same, and a method for automatically assigning a position of a 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.

In order to achieve the above object, the tire pressure sensing module comprising a phase angle sensor for detecting the phase angle of the wheel; A pressure sensing sensor for sensing pressure or temperature of the tire; Storing a unique identifier and determining a first transmission position according to the unique identifier and a second transmission position based on the unique identifier and the first transmission position among transmission position resolutions in which the wheel is equally divided into predetermined division values. A pressure sensing control unit; And when the phase angle of the wheel sensed by the phase angle sensor is the first transmission position, the first tire information including the pressure value or the temperature value of the tire and the unique identifier is transmitted. And a pressure sensing transmitter configured to transmit second tire information including the detected tire pressure value or temperature value and the unique identifier when the detected phase angle of the wheel is the second transmission position.

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

According to the tire pressure sensing module of the present invention, the tire pressure sensing system including the tire pressure sensing module, and the location automatic allocation method of the tire pressure sensing module, one or more of the following effects can be obtained.

First, there is an advantage that the transmission packet is simplified because the pressure or temperature value of the tire is transmitted at the transmission position determined by the unique identifier, and the information on the phase angle and the transmission time is not transmitted together.

Second, there is an advantage that the entire operation is simplified because only the transmission time of the received tire information is calculated and only the rotation information of the wheel of the calculated transmission time is analyzed.

Third, it is also advantageous to determine two transmission positions using unique identifiers and to transmit tire information only two times, thereby reducing the number of transmissions and shortening the time of the entire operation.

Fourth, since the transmission position is determined using the unique identifier, there is an advantage in that interference with other tire pressure sensing modules is reduced.

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 view showing a tire pressure sensing system according to 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 diagram illustrating transmission position resolution of a tire pressure sensing module according to an embodiment of the present invention.
4 is a diagram illustrating a configuration of tire information according to an embodiment of the present invention.
5 is a flowchart illustrating a method of controlling a tire pressure sensing module according to an embodiment of the present invention.
6 is a block diagram of a control unit according to an embodiment of the present invention.
7 is a flowchart illustrating a control method of a control unit according to an embodiment of the present invention.
8 is a diagram illustrating rotation information of each of a plurality of wheels.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with 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, a tire pressure sensing system including the same, and a method of automatically assigning a position of a tire pressure sensing module according to embodiments of the present invention.

1 is a view showing a tire pressure sensing system according to 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 detecting rotation information of the wheel 10 and a tire information receiving module 130 for wirelessly receiving tire information transmitted from the tire pressure detection module 120. [ Module 150 and rotation information 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. According to an embodiment, the wheel 10 may be provided in various numbers.

The tire 20 is mounted on the outer circumference of the wheel 10 of the vehicle and is formed of a rubber material. The tire 20 is mounted to 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 phase angle of the wheel 10 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 detecting module 120 may include a first transmission position and a second transmission position determined by a unique identifier among transmission position resolutions in which the detected phase angle of the wheel 10 is equally divided by the wheel 10 into a predetermined division value. When matching, the first tire information and the second tire information are transmitted. A detailed description of the tire pressure sensing module 120 will be described later with reference to FIG.

The wheel rotation sensing module 130 senses the rotation information of the wheel 10 indicating the degree of rotation of the wheel 10. The wheel rotation detection module 130 is provided in the wheel 10 or the vehicle body 1 and detects rotation information of the wheel 10 in various ways.

In this embodiment, a tooth is formed on the disk 30 of the wheel 10 that rotates together with the tire 20, and the wheel rotation detection module 130 detects that the teeth of the disk 30 pass by the wheel 10. Output as rotation information of). 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 and when the tooth passes without the teeth. do. In the present embodiment, the number of pulses generated by the wheel rotation detection module 130 is rotation information of the wheel 10. The sensor of the wheel rotation detection module 130 may use various sensors such as an optical sensor, an inductive sensor, or a hall effect sensor capable of detecting the passing of the tooth.

The teeth of the disk 30 have a set number. The number of teeth may vary according to the type of vehicle or wheel 10, and accordingly, the number of pulses generated by the wheel rotation sensing module 130 may also change when the wheel 10 rotates one revolution. In this embodiment, 48 teeth of the disk 30 are formed. Accordingly, the wheel rotation detection module 130 generates 96 pulses when the wheel 10 rotates one turn.

The wheel rotation detection module 130 detects the number of teeth passing from an arbitrary time point and outputs the number of pulses thereof. If the number of pulses generated by the wheel rotation detection module 130 when the wheel 10 rotates one revolution is N_pul, the number of pulses output by the wheel rotation detection module 130 when the wheel rotation detection module 130 rotates by P degree at any point. N_sh is

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

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

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

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 senses the rotation information of the FR disk 30FR of the FR wheel 10FR and the FL wheel rotation detection module 130FL detects the rotation information of the FL disk 30FL of the FL wheel 10FL The RR wheel rotation detection module 130RR detects the rotation information of the RR disk 30RR of the RR wheel 10RR and the RL wheel rotation detection module 130RL senses the rotation information of the RL disk 10RL As shown in FIG.

The plurality of wheel rotation detection modules 130 transmits rotation information of each 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 by wire. 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.

Since the tire pressure sensing module 120 transmits the first tire information and the second tire information at the determined first transmission position and the second transmission position, the tire information receiving module 150 receives the first tire information and the second tire information. Receive.

The control unit 140 receives rotation information of each of the plurality of wheels 10 from the plurality of wheel rotation detection modules 130. The control unit 140 accumulates and stores the rotation information of each of the plurality of wheels 10 received from an arbitrary time point over time.

The control unit 140 determines the position of the tire pressure sensing module 120 from the rotation information of the wheel 10 received from the wheel rotation sensing module 130 and 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.

2 is a block diagram of a tire pressure sensing module according to an embodiment of the present invention, FIG. 3 is a diagram showing a transmission position resolution of a tire pressure sensing module according to an embodiment of the present invention, and FIG. 4 is an embodiment of the present invention. 2 is a diagram illustrating a configuration of tire information according to an embodiment of the present disclosure.

Tire pressure detection module 120 according to an embodiment of the present invention, the pressure sensor 121 for detecting the pressure and / or temperature of the tire 20 and the phase angle for detecting the phase angle of the wheel 10 The first transmission is performed by a unique identifier among the sensor 122, a pressure sensing transmitter 124 for wirelessly transmitting tire information, and a transmission position resolution that stores the unique identifier and divides the wheel 10 evenly into predetermined division values. And a pressure sensing control unit 123 for determining the position and determining the second transmission position by the unique identifier and the first transmission position.

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 phase angle sensor 122 senses the phase angle of the wheel 10. The phase angle sensor 122 senses the phase angle of the tire 20 of the wheel 10 or senses the phase angle of the rim of the wheel 10 or detects the phase angle of the tire 10 of the tire pressure sensing module 120 The phase angle can be detected.

Preferably, the phase angle sensor 122 calculates an accurate phase angle from a reference point when the wheel 10 rotates, but according to an embodiment, measures the phase angle displacement during a set time when the wheel 10 rotates, or the wheel When (10) rotates, a signal can be output when a certain phase angle is reached.

The phase angle sensor 122 may output an electrical signal in response to a change in gravity, an electrical signal in response to a change in acceleration, or output a signal in the event of a ground impact. The phase angle sensor 122 may use various sensors such as a piezoelectric sensor, an acceleration sensor, or an impact sensor according to a signal output method.

In this embodiment, the phase angle sensor 122 is an acceleration sensor installed in the direction of gravity and outputting an electrical signal in accordance with the 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 the acceleration in the radial direction of the wheel 10, but outputs only the gravitational acceleration component except for 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, the phase angle P is 0 degrees when the phase angle sensor 122 outputs the minimum value when the wheel 10 rotates, and the phase angle P is 90 degrees when the median value is output, and the maximum value is 90 degrees. When outputting, the phase angle P is 180 degrees, and when outputting the intermediate value, it is 270 degrees. The phase angle P may 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 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 phase angle 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 control unit 123 stores the unique identifier I. The unique identifier I is preferably different from each other in the tire pressure sensing module 120, and 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 calculates the phase angle P of the wheel 10 from the signal output from the phase angle sensor 122. The pressure sensing controller 123 converts the analog signal output from the phase angle sensor 122 into a digital signal to calculate the phase angle P of the wheel 10.

The pressure sensing control unit 123 determines the first transmission position by a unique identifier among the transmission position resolutions in which the wheel 10 is equally divided by the preset division value D, and the second transmission position is determined by the unique identifier and the first transmission position. Determine the transmission position. The pressure sensing controller 123 outputs first tire information when the phase angle of the wheel 10 coincides with the first transmission position, and the pressure sensing transmitter 124 transmits the output first tire information. The pressure sensing control unit 123 outputs the second tire information when the phase angle of the wheel 10 coincides with the second transmission position, and the pressure sensing transmitter 124 transmits the output second tire information.

Referring to FIG. 3, the transmission position resolution is set by dividing the wheel 10 evenly into a predetermined division value D. FIG. In the present embodiment, the preset division value D is 8 and the transmission position resolution is divided by the wheel 10 at intervals of 45 degrees, and the numbers are set from [0] to [7] in the clockwise direction.

The first transmission position S1 is determined as the remaining value obtained by dividing the unique identifier I by the predetermined division value D. FIG. The first transmission position S1 is calculated as follows.

1st transmission position S1 = I% D

In the present embodiment, the unique identifier I is 9 and thus the first transmission position S1 is 9% 8 = 1. Therefore, as shown in Fig. 3A, the position at which the transmission position resolution is [1] becomes the first transmission position.

The pressure sensing control unit 123 is configured when the phase angle P of the wheel 10 detected by the phase angle sensor 122 coincides with [1] of the transmission position resolution of the first transmission position S1, that is, the wheel ( When the phase angle P of 10 is 45 degrees, the first tire information is transmitted through the pressure sensing transmitter 124.

The second transmission position S2 is determined by adding the remaining value obtained by dividing the unique identifier I by the value obtained by subtracting 1 from the predetermined division value D, and adding the 1 to the first transmission position S1. The second transmission position S2 is calculated as follows.

2nd transmission position S2 = {I% (D -1)} + (S1 + 1)

Adding 1 at the first transmission position S1 is intended to allow a phase difference between the first transmission position and the second transmission position since the remaining values may be zero.

In this embodiment, since the unique identifier I is 9 and the first transmission position S1 is 1, the second transmission position S2 is (9% 7) + (1 + 1) = 3. Therefore, as shown in Fig. 3B, the position at which the transmission position resolution is [3] becomes the second transmission position.

When the phase angle P of the wheel 10 detected by the phase angle sensor 122 coincides with [3] of the resolution of the transmission position at the second transmission position S2, that is, the pressure sensing controller 123 is used. When the phase angle P of 10 is 135 degrees, the second tire information is transmitted through the pressure sensing transmitter 124.

The pressure sensing control unit 123 processes the tire information. The tire information includes a unique identifier stored in the pressure sensing control unit 123, a pressure value and / or a temperature value detected by the pressure detection sensor 121, a voltage value detected by the battery 121, and various other information. can do.

Referring to FIG. 4, in the present embodiment, tire information is generated by processing a unique identifier, a pressure value, a voltage value, a temperature value, a retransmission number, and a checksum in order. 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.

According to an embodiment, the tire information may include a transmission position where the tire information is transmitted. That is, the first tire information may include the first transmission position S1, and the second tire information may include the second transmission position S2.

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 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 an embodiment, the unique identifier included in the tire information, the pressure value, the voltage value, the temperature value, the phase angle displacement, the number of retransmissions, and the order of the checksum may be changed, and the pressure value or the temperature value may be changed. However, the voltage value, the number of retransmissions, or the checksum may be excluded.

5 is a flowchart illustrating a method of controlling a tire pressure sensing module according to an embodiment of the present invention.

The tire pressure sensing module 120 detects the phase angle of the wheel 10 and the pressure and / or temperature of the tire 20 (S310). The pressure sensor 121 detects the pressure and / or temperature of the tire 20, and the phase angle sensor 122 detects the phase angle of the wheel 10.

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 phase angle sensor 122 outputs an electrical signal according to the change of gravity. The signal output from the phase angle sensor 122 is transmitted to the pressure sensing controller 123 and converted from an analog signal to a digital signal. The pressure sensing controller 123 calculates the phase angle of the wheel 10 from the signal output from the phase angle sensor 122.

The tire pressure sensing module 120 transmits first tire information including a pressure value and a temperature value of the tire 20 and a unique identifier at the first transmission position S1 (S320).

The pressure sensing controller 123 processes the first tire information when the first transmission position S1 and the phase angle P of the wheel 10 detected by the phase angle sensor 122 match among the resolutions of the transmission position. The pressure sensing control unit 123 processes the pressure value and / or temperature value of the tire 20 measured by the pressure sensor 121 at the first transmission position S1 together with the unique identifier, the voltage value, the number of retransmissions, and the checksum. To output the first tire information. The pressure sensing transmitter 124 transmits the first tire information output from the pressure sensing controller 123.

The pressure sensing controller 123 may repeatedly transmit the first tire information having the same value except for the number of retransmissions through the pressure sensing transmitter 124 at regular time intervals. The pressure sensing control unit 123 repeatedly transmits the first tire information changed only by the number of retransmissions at a predetermined time interval by a predetermined number of times.

The tire pressure sensing module 120 transmits first tire information including a pressure value and a temperature value of the tire 20 and a unique identifier at the second transmission position S2 (S330).

The pressure sensing controller 123 processes the second tire information when the phase angle P of the wheel 10 detected by the phase angle sensor 122 matches the second transmission position S2 among the resolutions of the transmission position. The pressure sensing controller 123 processes the pressure value and / or the temperature value of the tire 20 measured by the pressure sensor 121 at the second transmission position S2 together with the unique identifier, the voltage value, the number of retransmissions, and the checksum. To output the second tire information. The pressure sensing transmitter 124 transmits the second tire information output from the pressure sensing controller 123.

The pressure sensing controller 123 may repeatedly transmit the second tire information having the same value except for the number of retransmissions through the pressure sensing transmitter 124 at regular time intervals. The pressure sensing control unit 123 repeatedly transmits the second tire information changed only by the number of retransmissions at a predetermined time interval by a predetermined number of times.

6 is a block diagram of 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 processor 143 which receives rotation information of each of the plurality of wheels 10 from the plurality of wheel rotation detection modules 130 and stores and processes them. A tire information processor 142 for receiving the first tire information and the second tire information received by the tire information receiving module 150 and processing the tire information receiving module 150, a time calculating unit 144 for calculating time or calculating time displacement; And a control processor 141 for automatically allocating the position of the tire pressure sensing module 120 from the plurality of tire information processed by the tire information processor 142 and the rotation information processed by the rotation information processor 143.

The rotation information processor 143 receives each rotation information from the plurality of wheel rotation detection modules 130. The rotation information processor 143 accumulates and stores the rotation information received from an arbitrary time point over time. The rotation information processor 143 stores the rotation information for each point of time according to the time information provided by the time calculator 144.

For example, if the rotation information of the wheel 10 recorded at an arbitrary point is 10, the wheel 10 rotates 135 degrees, and the wheel rotation detection module 130 outputs 36 pulses, The rotation information at the time when the wheel 10 is rotated by 135 degrees is recorded as 46. [ When the wheel 10 rotates one revolution, 96 pulses are generated. When the wheel 10 exceeds 96, the rotation information is initialized to 0 and accumulated. If the rotation information recorded at any time is 94 and the wheel 10 rotates 45 degrees and the wheel rotation detection module 130 outputs 12 pulses, the control unit 140 rotates the wheel 10 by 45 degrees. Record the rotation information as 10.

The tire information processing unit 142 calculates and stores transmission times of the first tire information and the second tire information received from the tire information receiving module 150, and stores the first tire information and the second 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 may provide time information to the rotation information processor 143 to store rotation information of each of the plurality of wheels 10 for each view point. 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.

The control processing unit 141 calls the rotation information corresponding to the transmission time calculated from the transmission time calculated by the tire information processing unit 142 and the rotation information processed by the rotation information processing unit 143. Since the tire information processing unit 142 calculates the transmission time for each of the first tire information and the second tire information, the control processing unit 141 transmits the rotation information and the transmission time of the second tire information for the transmission time of the first tire information. Call the rotation information for each.

The control processor 141 detects the tire pressure by matching the first transmission position and the second transmission position with a plurality of called rotation information by the tire information processing unit 142 calculating the first transmission position and the second transmission position from the tire information. Automatically assign the location of module 120.

The control processor 141 will be described in detail later with reference to FIGS. 7 and 8.

7 is a flowchart illustrating a control method of a control unit according to an embodiment of the present invention, and FIG. 8 is a diagram illustrating rotation information of each of a plurality of wheels.

The control method of the control unit 140 according to an embodiment of the present invention is a tire pressure sensing module 120 by the control method of the tire pressure sensing module 120 according to an embodiment of the present invention described with reference to FIG. 5. When the first tire information and the second tire information are transmitted at a periodic time point, it is a control method for the control unit receiving the same.

The control unit 140 receives the first tire information through the tire information receiving module 150 (S410). The tire information receiving module 150 receives the first tire information and transmits it to the tire information processing unit 142 of the control unit 140.

The control unit 140 calculates a first transmission time that is a transmission time of the received first tire information (S420). The tire information processing unit 142 of the control unit 140 calculates the first transmission time from the received first 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 first transmission time of the first tire information by the method described above.

The tire information processing unit 142 receives the time information from the time calculating unit 144, grasps the reception time of the first tire information, and sets the first transmission time of the first tire information through the number of retransmissions included in the first tire information. Calculate

The control unit 140 calls first rotation information of each of the plurality of wheels 10 for the first transmission time (S430). The control processing unit 141 checks the first transmission time stored in the tire information processing unit 142, and the first rotation information of all the wheels 10 corresponding to the first transmission time in the rotation information stored in the rotation information processing unit 143. Call

When the first transmission time of the first tire information is t1, as shown in FIG. 8, the first rotation information of each of the plurality of wheels 10 corresponding to the first transmission time t1 is represented by the FR wheel 10FR and the FL wheel 10. FL), RR wheel 10RR, and RL wheel 10RL in this order [10, 0, 70, 22]. The control processor 141 stores the called first rotation information.

The control unit 140 receives the second tire information through the tire information receiving module 150 (S440).

The control unit 140 calculates a second transmission time that is a transmission time of the received second tire information (S450). The tire information processing unit 142 calculates a second transmission time of the second tire information. The method of calculating the second transmission time is the same as the method of calculating the first transmission time.

The control unit 140 calls second rotation information of each of the plurality of wheels 10 for the second transmission time (S460). Referring to FIG. 9, when the second transmission time of the second tire information is t2, the second rotation information of each of the plurality of wheels 10 corresponding to the second transmission time t2 may include the FR wheel 10FR and the FL wheel. 10 FL, RR wheel 10RR, and RL wheel 10RL in order of [46, 24, 94, 70].

The control unit 140 automatically allocates the position of the tire pressure sensing module 120 (S470). The control processor 141 calculates the first transmission position from the unique identifier included in the first tire information, and calculates the second transmission position from the unique identifier included in the second tire information and the first transmission position, thereby providing a tire pressure sensing module ( 120 will be automatically assigned. The control processor 141 may automatically assign the position of the tire pressure sensing module 120 in various ways. In this embodiment, the displacement between the first transmission position and the second transmission position is determined by the first rotation information and the second rotation. The position of the tire pressure sensing module 120 is automatically assigned by matching the displacement between the information.

The control processor 141 stores the preset division value D. The control processor 141 may calculate the first transmission position S1 and the second transmission position S2 from the stored divided value D and the unique identifier I included in the first tire information and the second tire information. have.

The control processor 141 may calculate the first transmission position S1 and the second transmission position S2 in the same manner as described above using the stored split value D and the unique identifier I of the tire information. That is, it is calculated as follows.

1st transmission position S1 = I% D

2nd transmission position S2 = {I% (D -1)} + (S1 + 1)

According to an embodiment, when the first tire position information S1 is included in the first tire information and the second transmission position S2 is included in the second tire information, the position of the tire pressure sensing module 120 is extracted without calculation. Can be assigned automatically.

In the present embodiment, since the first transmission position S1 is [1] and the second transmission position S2 is [3], the displacement of the first transmission position S1 and the second transmission position S2 is 2, so the angle is determined. Converting to 90 degrees.

In this embodiment, since the wheel rotation detection module 130 generates 96 pulses when the wheel 10 rotates one wheel, the wheel rotation detection module 130 outputs the pulse when the wheel rotation is rotated 90 degrees at an arbitrary point. When the number N_sh is calculated, the number N_sh of pulses is 96 * (90/360) = 24.

When comparing the number N_sh of pulses calculated from the phase angle displacement ΔP is equal to or substantially equal to the displacement between the first rotation information and the second rotation information, the position of the tire pressure sensing module 120 may be allocated.

Referring to FIG. 8, the first rotation information of the FL wheel 10FL is 0 and the second rotation information is 24. The rotational information displacement of the FL wheel 10FL is 24, which corresponds to 24, the number N_sh of pulses calculated from the displacements of the first transmission position S1 and the second transmission position S2.

Accordingly, the control processor 141 assigns the unique identifier included in the tire information to the FL wheel 10FL. The control processor 141 automatically assigns the tire pressure sensing module 120 that has transmitted tire information to the FL wheel 10FL.

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 (15)

A phase angle sensor for sensing the phase angle of the wheel;
A pressure sensing sensor for sensing pressure or temperature of the tire;
Storing a unique identifier and determining a first transmission position according to the unique identifier and a second transmission position based on the unique identifier and the first transmission position among transmission position resolutions in which the wheel is equally divided into predetermined division values. A pressure sensing controller; And
Transmitting the first tire information including the tire pressure value or the temperature value and the unique identifier detected when the phase angle of the wheel sensed by the phase angle sensor is the first transmission position and the phase angle sensor senses And a pressure sensing transmitter configured to transmit second tire information including a pressure value or a temperature value of the tire detected when the phase angle of the wheel is the second transmission position, and the unique identifier.
The pressure sensing transmitter retransmits the first and second tire information, respectively,
And the first and second tire information further include a resend count, which is a number of retransmission of the first and second tire information, respectively. The method according to claim 1,
The tire pressure sensing module determines the first transmission position by the remaining value obtained by dividing the unique identifier by the predetermined division value. 3. The method of claim 2,
The pressure sensing controller determines the second transmission position from the remaining value obtained by dividing the unique identifier by a value obtained by subtracting 1 from the preset division value and the first transmission position. The method according to claim 1,
And a pressure sensing battery for supplying power to the phase angle 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. delete delete In the control method of the tire pressure sensing module having a unique identifier, and detects the phase angle of the wheel, detects the pressure or temperature of the tire, and transmits tire information including the detected pressure value or temperature value of the tire,
And a pressure value or a temperature value of the tire and the unique identifier when the phase angle of the wheel coincides with the first transmission position determined by the unique identifier among the transmission position resolutions equally divided by the predetermined division value. Transmitting first tire information; And
Second tire information including a pressure value or a temperature value of the tire and the unique identifier when a phase angle of the wheel coincides with a second transmission position determined by the unique identifier and the first transmission position among the transmission position resolutions; Transmitting a;
The first and second tire information are each retransmitted repeatedly,
And the first and second tire information further include a resend number, the number of times of resending the first and second tire information, respectively. The method of claim 7, wherein
And the first transmission position is determined as a remaining value obtained by dividing the unique identifier by the predetermined division value. The method of claim 8,
And the second transmission position is determined from a remaining value obtained by dividing the unique identifier by a value obtained by subtracting 1 from the preset division value and the first transmission position. A first transmission position and a second transmission position determined by the unique identifier among transmission position resolutions in which the phase angle of the wheel and the pressure or temperature of the tire are sensed and the phase angle of the wheel is equally divided by the predetermined division value; A tire pressure sensing module configured to transmit a plurality of tire information including a pressure value or a temperature value of the tire detected at the transmission position and the unique identifier;
A wheel rotation detecting module that detects rotation information that is information on a rotation degree of each of the plurality of wheels;
A tire information receiving module configured to receive the plurality of tire information transmitted from the tire pressure sensing module; And
And a control unit for automatically allocating the position of the tire pressure sensing module from the rotation information and the plurality of tire information received from the wheel rotation sensing module.
If the tire information receiving module is unable to receive the plurality of tire information, the tire pressure sensing module retransmits each of the plurality of tire information,
And the plurality of tire information further includes a number of retransmissions, which is a number of retransmissions of the plurality of tire information, respectively. 11. The method of claim 10,
And said control unit calculates each transmission time of said plurality of tire information and calls up a plurality of said rotation information corresponding to said calculated plurality of transmission times. The method of claim 11,
The control unit calculates the first transmission position and the second transmission position from the unique identifier included in the tire information to determine a displacement between the first transmission position and the second transmission position and the displacement of the plurality of rotation information. A tire pressure sensing system that automatically assigns a position of the tire pressure sensing module by matching. In the method of automatically assigning the position of the tire pressure sensing module having a unique identifier and detecting the phase angle of the wheel and the pressure or temperature of the tire,
When the phase angle of the wheel coincides with the first transmission position and the second transmission position determined by the unique identifier among the transmission position resolutions which are divided equally into the predetermined division value, the pressure value or the temperature value of the tire and the Transmitting a plurality of tire information including a unique identifier;
Receiving the transmitted plurality of tire information; And
Automatically allocating the position of the tire pressure sensing module from the rotation information and the tire information, the rotation information being information on the degree of rotation of each of the plurality of wheels,
In the transmitting step,
The plurality of tire information are each retransmitted repeatedly,
And the plurality of tire information further includes a number of retransmissions, which is a number of retransmissions of the plurality of tire information. 14. The method of claim 13,
Wherein the step of automatically assigning the position of the tire pressure sensing module comprises:
Calculating each transmission time of the plurality of tire information received; And
And calling the plurality of rotation information corresponding to the calculated plurality of transmission times. 15. The method of claim 14,
Wherein the step of automatically assigning the position of the tire pressure sensing module comprises:
Computing the first transmission position and the second transmission position from the unique identifier included in the tire information to match the displacement between the first transmission position and the second transmission position with the displacement of the plurality of rotation information, the tire And automatically assigning a position of the pressure sensing module.

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