KR101349855B1 - 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 simply determines the position of the tire pressure monitoring module and automatically allocates the module; a tire pressure monitoring system including the same; and a method for automatically allocating the tire pressure monitoring module. The tire pressure monitoring module according to an embodiment of the present invention includes a phase angle sensor which senses the phase angle of a wheel, a tire pressure sensor which senses the pressure or temperature of a tire, a pressure sensing transmission unit which transmits tire information including pressure values or temperature values sensed by the tire pressure sensor, and a pressure sensing control unit which controls the pressure sensing transmission unit to transmit tire information when the phase angle of a wheel sensed by the phase angle sensor coincides with a predetermined phase angle. [Reference numerals] (AA) Start; (BB) End; (S410) Receiving tire information; (S420) Calculating the tire information transmission time; (S430) Calling wheel rotation information for each tire information transmission time; (S440) Allocating a tire pressure monitoring module to a tire in which the deviation of the wheel rotation information is the smallest among the wheels

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 to provide a tire pressure sensing module for transmitting a pressure value or a temperature value of a tire according to a phase angle of a wheel on which a tire is mounted, a tire pressure sensing system including the same, and a method for automatically allocating 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; A pressure sensing transmitter for transmitting tire information including a pressure value or a temperature value detected by the tire pressure sensor; And a pressure sensing controller controlling the pressure sensing transmitter to transmit tire information when the phase angle of the wheel sensed by the phase angle sensor coincides with a preset phase angle.

In order to achieve the above object, the tire pressure sensing system according to an embodiment of the present invention, the pressure detected by the phase angle of the wheel and the tire pressure or temperature detected when the detected phase angle of the wheel and the predetermined phase angle A tire pressure sensing module for transmitting tire information including a value or a temperature value; A wheel rotation detection module configured to detect rotation information which is information on a degree of rotation of each of the plurality of wheels; A tire information receiving module configured to receive tire information transmitted from the tire pressure sensing module; And a control unit for calculating a transmission time of the tire information received from the tire information receiving module and automatically allocating the position of the tire pressure sensing module from the rotation information corresponding to the calculated transmission time.

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, when the phase angle of the wheel on which the tire is mounted coincides with the preset phase angle, the tire does not transmit information about the phase angle and the transmission time by transmitting the pressure value or the temperature value of the tire, thereby simplifying the transmission packet.

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.

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 a tire pressure sensing module transmitting tire information at a predetermined phase angle 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 method of automatically assigning a position 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 showing rotation information 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 when the detected phase angle of the wheel 10 matches the preset phase angle. 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 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.

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 FIG. 5 is a diagram illustrating a tire pressure sensing module transmitting tire information at a predetermined phase angle, 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 Tire information when the phase of the sensor 122, the pressure sensing transmitter 124 for wirelessly transmitting tire information, the pressure sensing battery 121 for supplying power, and the wheel 10 coincide with the preset phase angle. And a pressure sensing controller 123 for controlling the pressure sensing transmitter 124 to transmit the pressure.

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

The signal output from the phase angle sensor 122 is transmitted to the pressure sensing controller 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 is not connected to the vehicle's electronic device by wire, it requires its own battery. The pressure sensing battery 121 serves as a 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 controller 123 transmits tire information through the pressure sensing transmitter 124 when the phase angle P of the wheel 10 matches the preset transmission phase angle P_set. When the phase angle P of the wheel 10 coincides with the preset transmission phase angle P_set, the pressure sensing controller 123 processes the tire information and outputs the tire information to the pressure sensing transmitter 124. The pressure sensing transmitter 124 transmits tire information output from the pressure sensing controller 123 when the phase angle P of the wheel 10 matches the preset transmission phase angle P_set.

Since the phase angle P of the wheel 10 coincides with the preset transmission phase angle P_set at intervals of 360 degrees, the pressure sensing control unit 123 transmits tire information to the pressure sensing transmitter 124 every time the wheel 10 rotates. Send via According to an exemplary embodiment, whenever the wheel 10 rotates a plurality of times, the pressure sensing controller 123 may transmit tire information through the pressure sensing transmitter 124.

The preset transmission phase angle P_set through which the tire information is transmitted may be uniquely set according to the tire pressure sensing module 120. In the present embodiment, the preset transmission phase angle P_set is 180 degrees. Therefore, when the phase angle sensor 122 outputs the maximum value, the pressure sensing control unit 123 transmits the tire information when the tire information is transmitted through the pressure sensing transmitter 124.

Referring to FIG. 4, at time t1 when the phase angle P of the wheel 10 coincides with a preset transmission phase angle P_set as time passes, the pressure sensing controller 123 may read tire information when the t1 is the pressure sensing transmitter ( 124, and at time t2 when the wheel 10 rotates once and the phase angle P coincides with the preset transmission phase angle P_set, the pressure sensing control unit 123 transmits the tire information when the t2 is the pressure sensing transmitter 124. Send via). Similarly, the pressure sensing controller 123 transmits tire information through the pressure sensing transmitter 124 at t3, t4, and t5.

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 sensing sensor 121, a voltage value of the battery 121, and various other information. can do.

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 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 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 number of retransmissions is set according to the embodiment, and in the present embodiment, the tire information is transmitted repeatedly 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 number of retransmissions, and the order of the checksum may be changed, and either the pressure value or the temperature value or the voltage value may be changed. , Or the number of retransmissions, or 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 determines whether the detected phase angle of the wheel 10 matches the preset phase angle (S320). The pressure sensing controller 123 calculates the phase angle P of the wheel 10 from the signal output from the phase angle sensor 122, and the transmission phase in which the phase angle P of the wheel 10 is preset. Determine if it matches each P_set.

When the phase angle P of the wheel 10 does not match the preset transmission phase angle P_set, the tire pressure sensing module 120 continuously senses the phase angle of the wheel 10 and the pressure and / or temperature of the tire 20. (S310).

When the phase angle P of the wheel 10 matches the preset transmission phase angle P_set, the tire pressure sensing module 120 transmits tire information including the pressure and / or temperature of the tire (S330). When the phase angle P of the wheel 10 coincides with the preset transmission phase angle P_set, the pressure sensing controller 123 processes the tire information and outputs the tire information to the pressure sensing transmitter 124. The pressure sensing transmitter 124 transmits tire information output from the pressure sensing controller 123 when the phase angle P of the wheel 10 matches the preset transmission phase angle P_set. In this embodiment, the tire information is generated by processing the unique identifier, the pressure value, the voltage value, the temperature value, the number of retransmissions, and the checksum in order.

It is preferable that the pressure sensing controller 123 repeatedly transmits the tire information having the same remaining values except for the number of times of retransmission through the pressure sensing transmitter 124 at regular time intervals. The pressure sensing controller 123 repeatedly transmits the tire information whose number of times of retransmission has changed by a predetermined number of times at regular time intervals.

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 processor 142 receives the tire information received by the tire information receiving module 150 and processes the tire information, a time calculator 144 for calculating a time or a time displacement, and the tire information processor 142. And a control processor 141 for automatically allocating the position of the tire pressure sensing module 120 from the processed tire information 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 processor 142 calculates the transmission time of the tire information received from the tire information receiving module 150. The tire information processing unit 142 stores the tire information received from the tire information receiving module 150 together with the calculated transmission time.

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 processor 141 automatically allocates the position of the tire pressure sensing module 120 from the transmission time of the tire information calculated by the tire information processor 142 and the rotation information processed by the rotation information processor 143.

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.

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

The control unit 140 calculates the transmission time of the received tire information (S420). The tire information processing unit 142 of the control unit 140 calculates the transmission time of the tire information through the reception time of the tire information and the number of retransmissions included in the tire information. The tire information processor 142 receives the time information from the time calculator 144 and grasps the reception time of the tire information.

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 stores the received tire information together with the transmission time.

The control unit 140 checks the stored tire information and calls rotation information of each of the plurality of wheels 10 with respect to the transmission time of the tire information (S430).

The control processing unit 141 confirms the transmission time of the plurality of tire information stored in the tire information processing unit 142, and rotates all the wheels 10 corresponding to the transmission time confirmed in the rotation information stored in the rotation information processing unit 143. Call up information.

For example, when the transmission time of the plurality of tire information stored in the tire information processing unit 142 is t1, t2, t3, t4, t5, respectively, rotation of all the wheels 10 at the time points t1, t2, t3, t4, t5. The information is called from the rotation information processor 143 and listed as shown in FIG.

The control unit 140 automatically allocates the tire pressure sensing module 120 from the called rotation information (S440). The control processor 141 assigns the tire pressure sensing module to the wheel 10 having the smallest deviation of the called rotation information among the plurality of wheels 10.

Since the rotation information of the wheel 10 changes according to the change in the phase angle of the wheel 10, the rotation information measured at the transmission time of the tire information in which the phase angle of the wheel 10 matches the existing phase angle is almost constant. Therefore, the control processor 141 assigns the tire pressure sensing module to the wheel 10 having the smallest deviation of the rotation information corresponding to the transmission time of the tire information.

Referring to FIG. 8, the rotation information of the FL wheel 10FL when the tire information is transmitted is [30, 35, 28, 31, 37]. The mean for this is 32.2 and the standard deviation is about 3.7, which is the smallest than the standard deviation for the rotational information of the other wheel 10.

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.

Claims (12)

A phase angle sensor for sensing the phase angle of the wheel;
A tire pressure sensor for sensing pressure or temperature of the tire;
A pressure sensing transmitter for transmitting tire information including a pressure value or a temperature value of the tire sensed by the tire pressure sensor; And
And a pressure sensing controller configured to control the pressure sensing transmitter to transmit tire information when the phase angle of the wheel sensed by the phase angle sensor coincides with a preset phase angle.
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,
Determining whether the detected phase angle of the wheel coincides with a preset phase angle; And
Transmitting tire information including the detected pressure value or temperature value of the tire when the phase angle of the wheel coincides with a preset phase angle,
The tire information is repeatedly retransmitted,
The tire information control method of the tire pressure sensing module further comprises a resend number which is a number of resend the tire information. The method of claim 5, wherein
The tire information control method of the tire pressure sensing module further comprises a unique identifier for identifying the tire pressure sensing module. delete A tire pressure sensing module configured to detect tire phase angle of a wheel and tire pressure or temperature and to transmit tire information including a detected pressure or temperature value of the tire when the detected phase angle of the wheel coincides with a preset phase angle;
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 for receiving the tire information transmitted from the tire pressure sensing module; And
A control unit for calculating a transmission time of the tire information received from the tire information receiving module and automatically allocating a position of the tire pressure sensing module from the rotation information corresponding to the calculated transmission time;
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 the control unit allocates the position of the tire pressure sensing module to a wheel having the smallest deviation of rotation information among the plurality of wheels. 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 detected pressure value or a temperature value of the tire when the detected phase angle of the wheel coincides with a preset phase angle;
Receiving the tire information;
Calculating a transmission time of the received tire information; And
Automatically allocating a position of the tire pressure sensing module from rotation information corresponding to the calculated transmission time among rotation information which is information on the degree of rotation of each of the plurality of wheels,
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. delete 11. The method of claim 10,
And automatically allocating the position of the tire pressure sensing module to allocate the position of the tire pressure sensing module to a wheel having a small deviation in rotation information among the plurality of wheels.

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