KR101349857B1 - 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 which detects the location of a tire pressure monitoring module and distributes automatically; a tire pressure monitoring system comprising the same; and a method for performing auto-location of the same. According to an embodiment of the present invention specification, a tire pressure monitoring module comprises: a phase angle sensor for detecting phase angles of wheels; a tire pressure monitoring sensor for sensing pressure or temperature of the tire; and a pressure monitoring transmitter for transmitting tire information including the pressure and temperature values; and a pressure monitoring control unit for controlling the pressure monitoring transmitter, which transfers the tire information at the corresponding time. [Reference numerals] (AA) START; (BB) END; (S410) Receiving first tire information; (S420) Calculating first transmission time of first tire information; (S430) Calling first rotary information of each wheel about first transmissiontime; (S440) Receiving second tire information; (S450) Calculating second transmission time of second tire information; (S460) Calling second rotary information of each wheel about second transmission time; (S470) Location automatic distribution by tire pressure sensing module

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.

Still another object of the present invention is a tire pressure sensing module for transmitting a phase angle of a wheel on which a tire is mounted and a tire pressure value or temperature value at a periodic time point, a tire pressure sensing system including the same, and a method for automatically assigning a position of a tire pressure sensing module. To provide.

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

According to an aspect of the present invention, there is provided a tire pressure sensing module including: a phase angle sensor for sensing a phase angle of a wheel; A tire pressure sensor for sensing pressure or temperature of the tire; And a pressure sensing transmitter for transmitting tire information including a phase angle of the wheel and a detected pressure value or temperature value of the tire. And a pressure sensing controller configured to control the pressure sensing transmitter to transmit the tire information including the phase angle of the wheel at the corresponding time point to the periodic time point.

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 in that the transmission packet is simplified since the phase angle of the wheel on which the tire is mounted is transmitted at a periodic point of time so as not to transmit information on the transmission time with the tire pressure or temperature value.

Secondly, since 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, the entire calculation is simplified.

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 wheel phase angle measurement of a tire pressure sensing module according to an exemplary embodiment of the present invention.
4 is a diagram illustrating that the tire pressure sensing module transmits tire information at a periodic time point according to an embodiment of the present invention.
5 is a diagram illustrating a configuration of tire information according to an embodiment of the present invention.
6 is a flowchart illustrating a control method of a tire pressure sensing module according to an embodiment of the present invention.
7 is a block diagram of a control unit according to an embodiment of the present invention.
8 is a flowchart of a control method of a control unit according to an embodiment of the present invention.
9 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 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. Since these computer program instructions may be mounted on a processor of a general purpose computer, special purpose computer, or other programmable data processing equipment, those instructions executed through the processor of the computer or other programmable data processing equipment may be described in flow chart block (s). It creates a means to perform the 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 portion of a module, segment, or code that includes one or more executable instructions for executing a 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 sensing module 120 transmits tire information including a phase angle of the wheel 10 and a detected pressure value and / or temperature value of the tire 20 at a corresponding time point at a corresponding time point.

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 an s degree at an arbitrary point. N_sh is

Number of pulses N_sh = N_pul * (s / 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 to receive respective tire information from the 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 tire information at a corresponding time point at a periodic time point, the tire information receiving module 150 receives a plurality of tire information transmitted at a periodic time point.

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, Figure 3 is a view showing the wheel phase angle measurement of the tire pressure sensing module according to an embodiment of the present invention, Figure 4 5 is a diagram illustrating a tire pressure sensing module transmitting tire information at a periodic time point, and FIG. 5 is a diagram illustrating a configuration of tire information according to an embodiment of the present invention.

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 A sensor 122, a pressure sensing transmitter 124 for wirelessly transmitting tire information, and a pressure sensing transmitter 124 to transmit tire information including a phase angle of the wheel 10 at a corresponding point in time at a periodic point in time. It includes a pressure sensing control unit 123 to control.

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

The pressure sensing controller 123 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 transmits tire information including a phase angle of the wheel 10 at a corresponding time point through the pressure sensing transmitter 124 at a corresponding time point. The pressure sensing control unit 123 calculates the phase angle P of the wheel 10 at the corresponding time point when the time point arrives at a periodic time point set at a predetermined time displacement Δt. The tire information including the phase angle of) is processed and output to the pressure sensing transmitter 124.

The pressure sensing transmitter 124 transmits tire information output from the pressure sensing controller 123 at a corresponding time. The pressure sensing transmitter 124 immediately transmits the tire information output from the pressure sensing controller 123 such that the phase angle of the wheel 10 included in the tire information is equal to or nearly equal to the time of transmission. Tire information transmitted from the pressure sensing transmitter 124 is transmitted at a periodic time point. That is, the pressure detection control unit 123 transmits tire information through the pressure detection transmission unit 124 at periodic time points.

The time displacement Δt is preferably set uniquely in accordance with the tire pressure sensing module 120. That is, the pressure sensing control unit 123 stores the intrinsic time displacement Δt.

Referring to FIG. 4, the pressure sensing controller 123 calculates the first phase angle P1 at the first time point t1. In this embodiment, the first phase angle P1 is 270 degrees. The pressure sensing controller 123 transmits the first tire information including the first phase angle P1, which is the phase angle of the wheel 10 at the first time point t1, through the pressure sensing transmitter 124. The pressure sensing transmitter 124 transmits first tire information including the first phase angle P1 at the first time point t.

At a second time point t2 = t1 + Δt at which the predetermined time displacement Δt has elapsed at the first time point t1, the pressure sensing controller 123 is a phase angle of the wheel 10 at the second time point t2. The tire information including the second phase angle P2 is transmitted to the second time point t2 through the pressure sensing transmitter 124. In this embodiment, the second phase angle P2 is zero degrees.

Similarly, the pressure sensing controller at the third time point t3 = t2 + Δt, the fourth time point t4 = t3 + Δt, and the fifth time point t5 = t4 + Δt arriving at predetermined intervals of time Δt. 123 transmits the tire information including the third phase angle P3, the fourth phase angle P4, and the fifth phase angle P5, respectively, through the pressure sensing transmitter 124. In the present embodiment, the third phase angle P3, the fourth phase angle P4, and the fifth phase angle P5 are 135 degrees, 315 degrees, and 225 degrees, respectively.

In the present exemplary embodiment, the pressure sensing control unit 123 transmits five tire information at five time points. However, according to the exemplary embodiment, the pressure sensing control unit 123 may transmit two or more tire information at two or more time points.

The pressure sensing control unit 123 processes the tire information. The tire information may include a unique identifier stored in the pressure sensing controller 123, a pressure value and / or a temperature value detected by the pressure sensing sensor 121, a voltage value detected by the battery 121, and a corresponding time point among the periodic time points. May include a phase angle detected by the phase angle sensor 122 and various other information.

Referring to FIG. 5, in the present embodiment, tire information is generated by processing a unique identifier, a pressure value, a voltage value, a temperature value, a phase angle, a number of retransmissions, 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.

The unique identifier is a number assigned to 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 phase angle is a phase angle of the wheel 10 sensed by the phase angle sensor 122 at a corresponding time point in the periodic view and is input in degrees or radians. According to an embodiment, one wheel may be divided into specific values and input as a unique unit. In this embodiment, the phase angle is in degrees and has a size of 16 bits.

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

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

Preferably, the above-described predetermined time shift DELTA t is larger than the interval generated by retransmission. That is, it is preferable that the time displacement DELTA t is larger than the retransmission interval t_repeat * retransmission number R. FIG.

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, the number of retransmissions, and the order of the checksum may be changed, and the pressure value or the temperature value may be changed. Or the voltage value, the number of retransmissions, or the checksum may be excluded.

6 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 P of the wheel 10 from the signal output from the phase angle sensor 122.

The tire pressure sensing module 120 stores first tire information including a phase angle of the wheel 10 at the first time point t1, a pressure value of the tire 20, and a temperature value at a periodic time point at the first time point t1. Transmit (S320).

The pressure sensing controller 123 calculates the first phase angle P1 from the signal output from the phase angle sensor 122 at the first time point t1. The pressure sensing control unit 123 may determine the pressure value and / or the temperature value of the tire 20 measured by the pressure sensor 121 at the first time point t1 and the first phase angle P1, the unique identifier, the voltage value, The first tire information is output by processing together with the number of retransmissions and the checksum. The pressure sensing transmitter 124 transmits the output first tire information at the first time point t1.

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 may include the tire and the phase angle of the wheel 10 at the second time point t2 = t1 + Δt after a predetermined time displacement Δt has elapsed from the first time point t1 according to the periodic time point. The second tire information including the pressure value and the temperature value of 20 is transmitted to the second time point t2 (S330).

The pressure sensing control unit 123 performs a second phase from a signal output from the phase angle sensor 122 at a second time point t2 = t1 + Δt after a predetermined time shift Δt has elapsed from the first time point t1. The angle P2 is calculated. The pressure sensing control unit 123 measures the pressure value and / or the temperature value of the tire 20 measured by the pressure sensor 121 at the second time point t2, and the second phase angle P2, the unique identifier, the voltage value, The second tire information is output by processing together with the number of retransmissions and the checksum. The pressure sensing transmitter 124 transmits the output second tire information at the second time point t1.

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.

In the present exemplary embodiment, the tire pressure sensing module 120 includes the first tire information and the second phase angle including the first phase angle P1 at the first time point t1 and the second time point t2, respectively. Although it has been described that the second tire information including P2) is transmitted, according to the embodiment, the third tire information including the third phase angle P3 is transmitted at the third time point t3 according to the periodic view, and The fourth tire information including the fourth phase angle P4 at the fourth time point t4, the fifth tire information including the fifth phase angle P5 at the fifth time point t5, and the like. It may be performed repeatedly.

7 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. The tire information receiving module 150 receives a plurality of tire information received and processes the tire information processing unit 142, a time calculating unit 144 for calculating a time or a time displacement, and a tire information processing unit 142. 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) 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 the transmission time of the plurality of tire information received from the tire information receiving module 150, and extracts each phase angle included in the plurality of tire information. The tire information processing unit 142 stores the extracted plurality of phase angles together with the calculated respective transmission times.

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 a plurality of transmission times for the plurality of tire information, the control processing unit 141 calls the plurality of rotation information for each of the plurality of wheels 10 for the plurality of transmission times.

The control processor 141 automatically assigns a position of the tire pressure sensing module 120 by matching the plurality of phase angles extracted by the tire information processor 142 from the plurality of tire information with the called rotation information. The control processor 141 may automatically allocate the position of the tire pressure sensing module 120 by matching and matching the displacements of the plurality of phase angles and the displacements of the plurality of rotation information.

A detailed description of the control processing unit 141 will be described later with reference to FIGS. 8 and 9.

8 is a flowchart illustrating a control method of a control unit according to an embodiment of the present invention, and FIG. 9 is a diagram illustrating rotation information of each of a plurality of wheels.

Control method of the control unit 140 according to an embodiment of the present invention is a tire pressure detection module 120 by the control method of the tire pressure detection module 120 according to an embodiment of the present invention described with reference to FIG. 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 tire information processor 142 extracts the first phase angle P1 from the first tire information. The tire information processing unit 142 stores the first phase angle P1 included in the first tire information together with the first transmission time. In this embodiment, the first phase angle is 270 degrees.

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. 9, 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, and extracts the second phase angle P2 from the second tire information. The tire information processing unit 142 stores the second phase angle P1 included in the second tire information together with the second transmission time. In this embodiment, the second phase angle is 0 degrees.

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 automatically assigns the position of the tire pressure sensing module 120 from the first phase angle P1 and the second phase angle P2 and the first rotation information and the second rotation information. The control processing unit 141 may automatically allocate the position of the tire pressure sensing module 120 in various ways. The position of the tire pressure sensing module 120 is automatically assigned by matching the displacement of the first rotation information and the second rotation information of each of the wheels 10.

Since the phase angle displacement ΔP of the first phase angle P1 and the second phase angle P2 is P2-P1, the phase angle displacement ΔP in this embodiment is 360-270 = 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. 9, the first rotation information of the FL wheel 10FL is 0 and the second rotation information is 24. The rotation information displacement of the FL wheel 10FL is 24, which corresponds to 24, which is the number N_sh of pulses calculated from the phase angle displacement ΔP.

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.

In the above-described embodiment, the control unit 140 analyzes only two tire information, which is the first tire information and the second tire information, to allocate the position of the tire pressure sensing module 120. The position of the tire pressure sensing module 120 may be allocated from three or more tire information, such as the tire information to the fifth tire information.

For example, the first phase angle P1 to the fifth phase angle P5 included in the first tire information to the second tire information are [270, 0, 135, 315, 225] sequentially as shown in FIG. The phase angle displacements for this are [90, 135, 180, 270] in order.

Since this is represented by the number of pulses, since it is [24, 36, 48, 72], when it is matched with the plurality of rotation information shown in FIG. 9, it corresponds to the FL wheel 10FL. By analyzing a lot of tire information in this way, you can increase the accuracy.

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 (13)

A phase angle sensor for sensing the phase angle of the wheel;
A tire pressure sensor for sensing pressure or temperature of the tire; And
A pressure sensing transmitter for transmitting tire information including a phase angle of the wheel and a detected pressure value or temperature value of the tire; And
And a pressure sensing controller configured to control the pressure sensing transmitter to transmit the tire information including the phase angle of the wheel at the corresponding time point to a periodic time point,
The pressure sensing transmission unit retransmits the tire information,
Wherein the tire information further includes a number of retransmissions that is the number of retransmissions of the tire information. The method of claim 1,
The pressure sensing control unit stores a unique identifier for identifying the tire pressure sensing module,
Wherein the tire information further includes the unique identifier. The method of 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 A control method of a tire pressure sensing module for sensing a phase angle of a wheel and sensing a pressure or temperature of the tire,
Transmitting first tire information including the phase angle of the wheel at the first time point and the detected pressure value or temperature value of the tire at the first time point; And
Transmitting first tire information including the phase angle of the wheel at the second time point at which the predetermined time shift has elapsed from the first time point and the detected tire pressure value or temperature value to the second time point; ,
The plurality of tire information are each retransmitted repeatedly,
The tire information control method of the tire pressure sensing module further comprises a resend number of times that is the number of retransmission of each tire information. The method of claim 5, wherein
And the tire information further comprises a unique identifier for identifying the tire pressure sensing module. delete A tire pressure sensing module configured to sense a phase angle of a wheel, a pressure or a temperature of a tire, and transmit tire information including a phase angle of the wheel and a detected pressure or temperature value of the tire at a corresponding time point at a periodic time point;
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 a plurality of the tire information transmitted from the tire pressure sensing module to the periodic time point; And
And a control unit for automatically allocating the position of the tire pressure sensing module from the phase angles of the wheels of the plurality of tire information received from the rotation information received from the wheel rotation sensing module and the tire information receiving module. and,
Wherein when the tire information receiving module can not receive the tire information, the tire pressure detecting module retransmits the tire information,
Wherein the tire information further includes a retransmission number that is a number of retransmissions of the tire information. The method of claim 8,
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 9,
And the control unit automatically assigns a position of the tire pressure sensing module by matching displacements of phase angles of the plurality of wheels with displacements of the plurality of rotation information. A method of automatically assigning a position of a tire pressure sensing module that senses a phase angle of a wheel and senses a pressure or temperature of the tire,
Transmitting tire information including a phase angle of the wheel at the corresponding time point and a detected pressure or temperature value of the tire at a periodic time point at the corresponding time point;
Receiving a plurality of the tire information transmitted to the periodic time point; And
Automatically allocating a position of the tire pressure sensing module from rotational information which is information on a degree of rotation of each of the plurality of wheels and phase angles of the plurality of wheels of the plurality of tire information received;
In the transmitting step,
The tire information is repeatedly retransmitted,
Wherein the tire information further includes a retransmission count that is a number of retransmissions of the tire information. The method of claim 11,
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. 13. The method of claim 12,
Wherein the step of automatically assigning the position of the tire pressure sensing module comprises:
And assigning positions of the tire pressure sensing module by matching displacements of phase angles of the plurality of wheels and displacements of the plurality of rotation information.

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