SENSOR DEVICE AND METHOD FOR TIRE MONITORING

Abstract

The present disclosure provides a sensor device for monitoring a tire, comprising a sensor mounted inside a tire and measuring a pressure and a temperature inside the tire and an acceleration corresponding to tire rotation, a memory storing pressure data, temperature data, and acceleration data measured by the sensor, a processor varying a transmission period of at least one of the pressure data, the temperature data, and the acceleration data based on the acceleration data, and a transmitter transmitting at least one of the pressure data, the temperature data, and the acceleration data according to the transmission period.

Description

CROSS REFERENCE TO RELATED APPLICATIONThis application claims priority to and the benefit of Korean Patent Application No. 10-2023-0173590, filed Dec. 4, 2023, and No. 10-2024-0053948, filed Apr. 23, 2024, the disclosures of which are incorporated herein by reference in their entirety.BACKGROUND1. Field of TechnologyThe present disclosure relates to a sensor device and a method for monitoring a tire (hereinafter referred to as a "tire monitoring sensor device and method"), and more particularly, to a tire monitoring sensor device and a method for varying a data transmission period.2. Discussion of the Prior ArtThe tires are the only vehicle parts that come into contact with the roadway and play a very important role in the vehicle's drivability and safety because they generate the vehicle's turning, driving and braking forces to allow the vehicle to drive.A conventional tire pressure monitoring sensor (TPMS) is configured to include a pressure sensor and a temperature sensor, and measures the air pressure and temperature of the tire and the battery voltage of the sensor using these sensors, and transmits the air pressure state of the tire to a control device mounted on the vehicle in a certain period of time via wireless communication.Recently, a tire monitoring sensor (TMS) including a pressure sensor, a temperature sensor and an acceleration sensor has been installed in the tire to measure the load acting on the tire, the running performance of the tire, the road surface characteristics and the like.However, unlike the conventional tire pressure monitoring sensor, the tire monitoring sensor (TMS) has a drawback of having to measure a large physical quantity, operating at a high sampling rate for precise measurement, and having a short data transfer time, so that the battery of the sensor is consumed in a short time.DETAILED DESCRIPTION OF THE DISCLOSUREThe present disclosure is intended to solve the above problems, and it is an object of the present disclosure to estimate a tire rotation duration, a state of the road surface, and whether to change a state of the road surface using acceleration data measured by the sensor and vary a data transmission period so that only necessary data is transmitted and unnecessary data transmissions are suppressed to reduce power consumption of the sensor and maximize the life of the battery.The technical problems of the present disclosure are not limited to the above-mentioned technical problems, and other technical problems not mentioned herein can be clearly understood by those skilled in the art from the following description.In order to solve the above problems, the present disclosure provides a tire monitoring sensor device including a sensor configured to measure a pressure and a temperature inside a tire and an acceleration corresponding to the rotation of the tire, a memory configured to store pressure data, temperature data, and acceleration data measured by the sensor, a processor configured to vary a transmission period of at least one of the pressure data, the temperature data, or the acceleration data based on the acceleration data, and a transmitter configured to transmit at least one of the pressure data, the temperature data, or the acceleration data corresponding to the transmission period.The processor may calculate a rotational speed of the tire based on the acceleration data.The processor may vary the transmission period depending on the rotational speed of the tire.The processor may determine the roadway characteristics based on the acceleration data.the processor may determine whether the roadway characteristics change based on the acceleration data.The processor may control the transmitter to transmit at least one of the pressure data, the temperature data, and the acceleration data based on the change in the road characteristics.the memory may store the transmission period set differently depending on the rotation speed of the tire.The memory may store reference acceleration data corresponding to the road characteristics.The processor may determine the roadway characteristics by comparing the acceleration data to the reference acceleration data.The present disclosure provides a method for tire monitoring using a sensor device, including measuring a pressure and a temperature inside a tire and an acceleration corresponding to rotation of the tire, storing pressure data, temperature data, and acceleration data measured by a sensor, varying a transmission period of at least one of the pressure data, the temperature data, or the acceleration data based on the acceleration data, and transmitting at least one of the pressure data, the temperature data, or the acceleration data corresponding to the transmission period.Varying a transmission period may include calculating a rotational speed of the tire based on the acceleration data and variably adjusting the transmission period based on the rotational speed of the tire.Varying a transmission period may include determining whether the road surface characteristics change based on the acceleration data, and controlling the transmitter to transmit at least one of the pressure data, the temperature data, or the acceleration data based on the change in the road surface characteristics.The tire monitoring method of the present disclosure may further include storing the transmission period set differently depending on the rotation speed of the tire.Determining whether the roadway characteristics change may include storing reference acceleration data corresponding to the roadway characteristics.Determining whether the roadway characteristics change may include determining the roadway characteristics by comparing the acceleration data to the reference acceleration data.According to the present disclosure, by estimating the tire rotation duration, the state of the road surface, and whether to change the state of the road surface using the acceleration data measured by the sensor and varying the data transmission period, only the required data is transmitted and unnecessary data transmission is suppressed to reduce power consumption of the sensor and maximize the life of the battery.The effects of the present disclosure are not limited to the above-mentioned effects, and should be understood to include all the effects that can be derived from the detailed description of the present disclosure or the composition of the disclosure described in the claims.BRIEF DESCRIPTION OF THE DRAWINGSThe above and other objects, features and advantages of the present disclosure will become more apparent to those skilled in the art from the description of exemplary embodiments thereof with reference to the accompanying drawings. FIG. 1 is a block diagram of a tire monitoring sensor device according to an embodiment of the present disclosure. FIG. 2 is a diagram showing a state in which a tire monitoring sensor device according to an embodiment of the present disclosure is mounted on a tire. FIG. 3 is a diagram illustrating a method of measuring a load acting on the tire by a tire monitoring sensor device according to an embodiment of the present disclosure. FIG. 4 is a diagram illustrating a method for measuring the rotational speed of a tire by a tire monitoring sensor according to an embodiment of the present disclosure. FIG. 5 is a diagram illustrating a method of measuring a state of the road surface by a tire monitoring sensor device according to an embodiment of the present disclosure. FIG. 6 is a diagram illustrating a method for determining a change in road surface characteristics by a tire monitoring sensor device according to an embodiment of the present disclosure. FIG. 7 is a flowchart of a method for tire monitoring according to an embodiment of the present disclosure. FIGS. 8 and 9 are flowcharts of a method for variably setting a transmission period of data according to an embodiment of the present disclosure.DETAILED DESCRIPTION OF EMBODIMENTSHereinafter, embodiments of the present disclosure will be described in detail, so that a person skilled in the art to which the present disclosure pertains can easily execute the embodiments. The present disclosure may be implemented in many different forms and is not limited to the embodiments described herein. In order to clearly describe the present disclosure, parts that do not refer to the description are omitted from the accompanying drawings, and the same or similar components are denoted by the same reference numerals throughout the specification.The words and terms used in the specification and claims are not to be understood only in their ordinary or dictionary meanings, but should be construed in their meaning and concept in accordance with the technical spirit of the present disclosure, according to the principle that the inventors can define terms and concepts to best describe their disclosure.Note that in the specification, the terms such as "comprise" or "have" are intended to specify the presence of features, any number, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to exclude the possibility of presence or addition of one or more other features, any other number, any one or more other steps, operations, or components, parts, or combinations thereof.FIG. 1 is a block diagram of a tire monitoring sensor device according to an embodiment of the present disclosure, and FIG. 2 is a diagram illustrating a state in which a tire monitoring sensor device according to an embodiment of the present disclosure is mounted on a tire.As illustrated in FIG. 1, the tire monitoring sensor device 100 according to an embodiment of the present disclosure may be configured to include a sensor 110, a processor 120, a transmitter 130, a battery 140, and a memory 150.The tire monitoring sensor device 100 according to an embodiment of the present disclosure may be disposed inside the tire 10, but is not limited thereto. For example, only the sensor 110 may be disposed inside the tire 10, while the processor 120, the transmitter 130, the battery 140, and the memory 150 may be disposed around the tire 10.The sensor 110 may be configured to include a pressure sensor that measures the pressure inside the tire 10, a temperature sensor that measures the temperature inside the tire 10, and an acceleration sensor that measures the acceleration corresponding to the rotation of the tire 10.The sensor 110 may be a tire monitoring sensor including the pressure sensor, the temperature sensor, and the acceleration sensor, and may be attached to a tire inner layer of the tire 10 as shown in FIG. 2.The pressure, temperature and acceleration data measured by the sensor 110 can be stored in the memory 150.The processor 120 may vary a transmission period of at least one of the pressure data, the temperature data, and the acceleration data based on the acceleration data.The transmitter 130 may transmit the pressure data, the temperature data, or the acceleration data to an in-vehicle controller and an external server according to the transmission period variably set by the processor 120.In this case, the transmitter 130 may communicate with the controller via a short-range wireless communication link. The short-range wireless communication method may include, for example, a Bluetooth Low Energy (BLE) method.Accordingly, the controller or the external server may monitor, based on the pressure data, the temperature data, and the acceleration data, the characteristics of the air pressure, the temperature, the tire running performance, the tire load, the road surface on which the vehicle travels, and so on.Here, the controller may display the characteristics of the air pressure, the temperature, the running performance, the load of the tire, the road surface on which the vehicle travels, etc. on a display in the vehicle.The battery 140 may power the sensor 110, the processor 120, and the transmitter 130.On the other hand, the sensor 110 is a tire monitoring sensor that is to measure a large physical quantity, operates with high sensing for accurate measurement, and has a short data transfer time, thereby consuming the battery 140 in a short time.Therefore, the tire monitoring sensor device according to an embodiment of the present disclosure aims to vary the data transmission period to minimize power consumption of the sensor 110 and increase the life of the battery.To this end, the tire monitoring sensor device according to an embodiment of the present disclosure may determine the data transmission period by estimating the rotation duration of the tire 10 and the road surface characteristics on which the vehicle travels using the acceleration data measured by the sensor 110.This makes it possible to maximize the life of the battery by reducing the power consumption of the sensor 110 by suppressing unnecessary data transmissions.FIG. 3 is a diagram illustrating a method of measuring a load acting on the tire by a tire monitoring sensor device according to an embodiment of the present disclosure.As shown in FIG. 3, the sensor 110 may measure the Z-axis acceleration (Acc. Z). Here, the memory 150 may store the acceleration data in the form of a waveform in which the acceleration of the Z axis measured by the sensor 110 changes with time.When the vehicle travels and the tire 10 rotates on the road, the tire 10 has a region where it is in contact with the road and a region where it deforms according to the contact with the road.Here, the length of the region where the tire 10 is in contact with the road surface (contact length), the length between a point B and a point D, and the length of the region where it is deformed by the contact with the road surface (deformation length), are the length between a point A and a point E. At this time, a point C is located between the points B and D.The Z-axis acceleration (Acc. Z) is minimum at points A and E and maximum at point C. The Z-axis acceleration (Acc. Z) at the point B is between the acceleration of the Z axis at the points A and C and the acceleration of the Z axis (Acc. Z) at point D lies between the accelerations of the Z axis at points A and E.That is, the acceleration of the Z axis (Acc. Z) has a minimum value at the point A, gradually increases to the point C via the point B, and has a maximum value at the point C, then gradually decreases to the point E via the point D, and has a minimum value at the point E.Here, the processor 120 may find the positions of the points B and D using the Z-axis acceleration (Acc. Z) and calculate the contact length of the region where the tire 10 comes into contact with the road surface, thereby obtaining the load acting on the tire.Specifically, the processor 120 may estimate that the load acting on the tire increases as the contact length of the region where the tire 10 is in contact with the road surface increases, and that the load acting on the tire decreases as the contact length of the region where the tire 10 is in contact with the road surface decreases. Here, the memory 150 may store a reference tire load corresponding to the contact length of the region where the tire 10 is in contact with the road surface, and the processor 120 may estimate the tire load based on the reference tire load stored in the memory 150.FIG. 4 is a diagram illustrating a method for measuring the rotational speed of a tire by a tire monitoring sensor according to an embodiment of the present disclosure.When the vehicle travels and the tire 10 rotates on the road (see FIG. 4 ), a pattern of the Z-axis acceleration (Acc repeats. Z) in a predetermined period corresponding to the rotational speed of the tire 10.For example, when the tire 10 rotates at a first speed, the pattern of the Z-axis acceleration (Acc repeats. Z) in a first rotation period (rotation period, A) corresponding to the first speed, and when the tire 10 rotates at a second speed that is slower than the first speed, the pattern of the Z-axis acceleration (Acc repeats. Z) in a second rotation duration (rotation duration, B) that is slower than the first rotation duration (rotation duration, A) corresponding to the second speed.The processor 120 may calculate the rotational speed of the tire 10 based on the acceleration data.Specifically, the processor 120 may calculate a time between the maximum value and the maximum value of the Z-axis acceleration pattern (Acc. Z) as the rotation duration.In addition, the processor 120 may insert the rotation duration into Equation 1 to calculate the rotation speed Vt of the tire 10.Here, Rt is the radius of the tire 10 and Pr is the rotation period of the tire 10.The processor 120 may vary the transmission duration of temperature data, pressure data, and / or acceleration data of the tire 10 depending on the rotational speed of the tire 10.Specifically, the memory 150 may store a transmission period set differently depending on the rotation speed of the tire 10, and the processor 120 may control the transmitter 130 to transmit the data at the transmission period corresponding to the rotation speed of the tire 10 stored in the memory 150.Here, the transmission period can be set by dividing the rotational speed into a plurality of sections.The memory 150 may store a reference acceleration of the X axis (Acc. X) for each rotational speed of the tire 10.Here, the processor 120 may determine the rotational speed of the tire 10 by comparing the X-axis acceleration pattern measured by the sensor 110 with the reference X-axis acceleration pattern stored in the memory 150.In addition, the processor 120 may control the transmitter 130 to transmit the data depending on the change in the rotational speed range of the tire 10.Namely, as the rotational speed range of the tire 10 changes, the external force acting on the tire 10 increases, thereby increasing the need for monitoring the tire 10.Moreover, the processor 120 may vary the transmission period in proportion to the rotational speed of the tire 10.For example, the processor 120 may set the transmission period shorter as the rotational speed of the tire 10 increases.This serves to accurately measure the state of the tire 10 by shortening the transmission period because the external force acting on the tire 10 increases as the rotational speed of the tire 10 increases, thereby increasing the need for monitoring the tire 10.On the contrary, the processor 120 may set the transmission period shorter as the rotation speed of the tire 10 decreases.This avoids unnecessary data transmission by increasing the transmission period because the need to monitor the tire 10 is reduced because the external force applied to the tire 10 decreases as the rotational speed of the tire 10 decreases.As described above, the tire monitoring sensor device according to an embodiment of the present disclosure estimates the rotation duration of the tire 10 using the acceleration data measured by the sensor 110 to determine the data transmission period, so that only necessary data is transmitted and unnecessary data transmissions are suppressed to reduce power consumption of the sensor 110 and maximize the life of the battery.FIG. 5 is a diagram illustrating a method of measuring a state of the road surface by a tire monitoring sensor device according to an embodiment of the present disclosure.As shown in FIG. 5, the processor 120 may determine the roadway characteristics based on the acceleration data. Here, the road surface characteristics may include a state in which complete aquaplaning, partial aquaplaning, dryness, slaps, and asperities are present.FIG. 5 shows the acceleration of the X-axis as a function of the tire rotation (Acc. X) when the road surface is in the conditions of complete aquaplaning, partial aquaplaning and drought.As shown in FIG. 5, the acceleration has the X axis (Acc. X) is a minimum cross-sectional value at a point X 1 where the tire 10 is in contact with the aquaplaning (a) during rotation of the tire 10, and a maximum cross-sectional value at a point X 2 where the tire 10 is in contact with the road surface.In addition, when the road surface is in the state of partial aquaplaning, the acceleration in the X axis has (Acc. X) a first cross-sectional minimum value at a point X 1 at which the tire 10 is in contact with the aquaplaning (a) during rotation of the tire 10, a second cross-sectional minimum value at a point X 2 at which the tire 10 is in contact with the road surface, and a cross-sectional maximum value at a point X 3 at which the tire 10 is in contact with the road surface.Here, the processor 120 may determine the degree of aquaplaning of the road surface by calculating a distance between the point X 2 at which the tire 10 starts contact with the road surface and the point X 3 at which the tire 10 ends contact with the road surface, and may vary the data transmission period according to the degree of aquaplaning of the road surface.The memory 150 may store a reference acceleration of the X axis (Acc. X) patterns for each height of the surface of the road aquaplaning.Here, the processor 120 may compare the X-axis acceleration pattern measured by the sensor 110 with the reference X-axis acceleration pattern stored in the memory 150 to determine the degree of hydroplaning on the road surface.Moreover, in the case of a dry road, the acceleration has the X axis (Acc. X) a second cross-sectional minimum value at a point X 1 at which the tire 10 starts contact with the road surface, and a cross-sectional maximum value at a point X 2 at which the tire 10 ends contact with the road surface.When the striking hole and the ground wave are present on the road surface, a certain X-axis acceleration (Acc. X) are obtained in patterns different from that of a planar road surface.Thus, the processor 120 may vary the transmission period of the data depending on the road characteristics. Here, the memory 150 may store the transmission period of the data set for each feature of the road surface.For example, if the roadway is in the full aquaplaning state, the processor 120 may set the transmission period of the data to be shorter than in the dry roadway state.As described above, the tire monitoring sensor device according to the embodiment of the present disclosure varies the external force applied to the tire 10 depending on the state of the road surface, so that by varying the transmission period depending on the state of the road surface, only necessary data is transmitted and unnecessary data transmission is suppressed to reduce power consumption of the sensor 110 and maximize the life of the battery.The memory 150 may store a reference acceleration of the X axis (Acc. X) Store patterns for each feature of the road surface. Here, the reference acceleration mirrors the X axis (Acc. X) patterns represent the type and diameter of the tire 10 and may be set differently depending on the rotation speed of the tire 10 even if the road surface characteristics are the same.For example, the reference acceleration of the X axis (Acc. X) pattern may be an acceleration pattern corresponding to a state in which complete aquaplaning, partial aquaplaning, dryness, slaps, and ground waves are present, respectively.Here, the processor 120 may determine the road surface characteristics by comparing the X-axis acceleration pattern measured by the sensor 110 with the reference X-axis acceleration pattern stored in the memory 150.For example, when the similarity between the X-axis acceleration pattern measured by the sensor 110 and the reference X-axis acceleration pattern in the full hydroplaning state is equal to or greater than a reference value (e.g., 80%), the processor 120 may estimate the current state of the road surface as the full hydroplaning state.Moreover, the processor 120 may control the transmitter 130 to estimate the state of the road surface and transmit the data whenever an event occurs on the road surface, for example, when it is estimated that a club or a ground wave is present.Namely, when an event occurs on the road surface, the external force acting on the tire 10 increases, thereby increasing the need for monitoring the tire 10.FIG. 6 is a diagram illustrating a method for determining a change in road surface characteristics by a tire monitoring sensor device according to an embodiment of the present disclosure.The processor 120 may determine whether the roadway characteristics change based on the acceleration data.As illustrated in FIG. 6, the processor 120 may determine that the state changes from "dry" to "full hydroplaning" based on the X-axis acceleration pattern.Here, the processor 120 may compare the X-axis acceleration pattern measured by the sensor 110 with the reference X-axis acceleration pattern stored in the memory 150 to determine whether the road surface characteristics change.In addition, the processor 120 may control the transmitter 130 to transmit at least one of the pressure data, the temperature data, and the acceleration data based on the change in the road surface characteristics.This is because the need to monitor the tire 10 increases because the external force acting on the tire 10 increases as the road characteristics change.As described above, the tire monitoring sensor device according to the embodiment of the present disclosure estimates whether the state of the road surface has changed from the acceleration data measured by the sensor 110 to determine the data transmission period, so that only necessary data is transmitted and unnecessary data transmission is suppressed to reduce power consumption of the sensor 110 and maximize the life of the battery.FIG. 7 is a flowchart of a method for tire monitoring according to an embodiment of the present disclosure; andFIGS. 8 and 9 are flowcharts of a method for variably setting a transmission period of data according to an embodiment of the present disclosure.Hereinafter, a method for tire monitoring according to an embodiment of the present disclosure will be described with reference to FIGS. 7 to 9.The tire monitoring method according to an embodiment of the present disclosure first stores a transmission period set differently according to a rotation speed of the tire 10 and the road surface characteristics, and reference acceleration data corresponding to the road surface characteristics in the memory 150.Next, in a tire monitoring method 10, with the sensor device 110, first, a pressure and a temperature inside the tire 10 and an acceleration corresponding to the rotation of the tire 10 are measured (step S 10).Subsequently, the pressure, temperature and acceleration data measured by the sensor 110 are stored in the memory 150 (step S20).Next, the transmission period of at least one of the pressure data, the temperature data, and the acceleration data is variably set based on the acceleration data measured by the sensor 110 (step S 30).In this case, as shown in FIG. 8, the rotation speed of the tire 10 may be calculated based on the acceleration data (step S 31), and the transmission period may be variably set based on the rotation speed of the tire 10 (step S 32).That is, the rotation period of the tire 10 is calculated from the repeating pattern of the acceleration data, and the rotation speed of the tire 10 is calculated from the rotation period.In addition, the transmitter 130 may be controlled to transmit the data at a transmission period corresponding to the rotation speed of the tire 10 stored in the memory 150.Here, the transmission period can be set by dividing the rotational speed into a plurality of sections.Moreover, the transmitter 130 is controlled to transmit the data in response to a change in the rotational speed range of the tire 10. This is because the external force acting on the tire 10 increases as the rotational speed range of the tire 10 changes, thereby increasing the need for monitoring the tire 10.Moreover, the transmission period may be varied in proportion to the rotational speed of the tire 10.For example, the transmission period may be set shorter as the rotation speed of the tire 10 increases. This serves to accurately measure the state of the tire 10 by shortening the transmission period because the external force acting on the tire 10 increases as the rotational speed of the tire 10 increases, thereby increasing the need for monitoring the tire 10.On the other hand, the transmission period may be set shorter as the rotational speed of the tire 10 decreases. This avoids unnecessary data transmission by increasing the transmission period because the need to monitor the tire 10 is reduced because the external force applied to the tire 10 decreases as the rotational speed of the tire 10 decreases.As described above, the tire monitoring method according to an embodiment of the present disclosure estimates the rotation duration of the tire 10 using the acceleration data measured by the sensor 110 to determine the data transmission period, so that only necessary data is transmitted and unnecessary data transmission is suppressed to reduce power consumption of the sensor 110 and maximize the life of the battery.Moreover, the transmission period of the data may be varied depending on the road characteristic. In this case, the memory 150 may store the data transmission period set for each road characteristic.For example, when the road is in the full aquaplaning state, the transmission period of the data may be set to be shorter than that in the dry state.As described above, the tire monitoring method according to the present embodiment varies the external force applied to the tire 10 depending on the state of the road surface, so that by varying the transmission period depending on the state of the road surface, only necessary data is transmitted and unnecessary data transmission is suppressed to reduce power consumption of the sensor 110 and maximize the life of the battery.The memory 150 may store a reference acceleration pattern for each road characteristic. Here, the reference acceleration pattern reflects the type and diameter of the tire 10, and may be set differently depending on the rotational speed of the tire 10 even when the road characteristics are the same.The reference acceleration pattern may be, for example, an acceleration pattern corresponding to a state in which complete aquaplaning, partial aquaplaning, dryness, slaps, and bottom waves are present.The roadway properties can be determined by comparing the acceleration pattern measured by sensor 110 with the reference acceleration pattern stored in memory 150.For example, when the similarity between the acceleration pattern measured by the sensor 110 and the reference acceleration pattern in the full aquaplaning state is equal to or greater than a reference value (e.g., 80%), the current road surface state may be estimated as the full aquaplaning state.Moreover, the transmitter 130 may be controlled to transmit the data whenever an event occurs on the road surface, for example, when it is estimated that a striking hole or a ground wave is present.Namely, when an event occurs on the road surface, the external force acting on the tire 10 increases, thereby increasing the need for monitoring the tire 10.Moreover, it is determined whether to change the road surface characteristics based on the acceleration data (step S 33), and the transmitter 130 controls the transmitter 130 to transmit at least one of the pressure data, the temperature data, and the acceleration data based on the change in the road surface characteristics (step S 34).In this case, the reference acceleration data corresponding to the road surface characteristics are stored, and the road surface characteristics are determined by comparing the acceleration data measured by the sensor 110 with the reference acceleration data.Next, the transmitter 130 transmits the print data, the temperature data, and the acceleration data corresponding to the transmission period (step S 40).In this case, the transmitter 130 may transmit the data to the in-vehicle control device and the external server according to the transmission period variably set by the processor 120.Accordingly, the controller or the external server may monitor, based on the pressure data, the temperature data, and the acceleration data, the characteristics of the tire air pressure, the temperature, the tire running performance, the tire load, the road surface on which the vehicle travels, and the like.Here, the controller may display the characteristics of the tire air pressure, the temperature, the tire running performance, the tire load, the road surface on which the vehicle travels, and the like on the display in the vehicle.As described above, the tire monitoring method according to the embodiment of the present disclosure estimates the rotation period of the tire 10, the state of the road surface, and the location where the state of the road surface is to be changed using the acceleration data measured by the sensor 110, and varies the data transmission period so that only necessary data is transmitted and unnecessary data transmissions are suppressed to reduce power consumption of the sensor 110 and maximize the life of the battery.It should be understood that the effects of the present disclosure are not limited to the effects described above, and include all effects that can be derived from a configuration of the disclosure described in the detailed descriptions or claims of the present disclosure.Although embodiments of the present disclosure have been described, the spirit of the present disclosure is not limited to the embodiments set forth in the description. A person skilled in the art who understands the spirit of the present disclosure can easily propose other embodiments by supplementing, changing, removing, or adding components within the scope of this spirit, but these embodiments are also within the scope of the spirit of the present disclosure.References included in the specificationThis list of documents cited by the applicant has been produced in an automated manner and is only included for the better information of the reader. The list is not part of the German patent application or utility model application. The DPMA does not take any adhesion for any faults or omissions.Patent Literature citedKR 10-2023-0173590

[0001] KR 10-2024-0053948

[0001]

Claims

A sensor device (100) for monitoring a tire, the device comprising: a sensor (110) configured to measure a temperature and a pressure of a tire (10) and an acceleration corresponding to the rotation of the tire (10); a memory (150) configured to store temperature data, pressure data, and acceleration data measured by the sensor (110); a processor (120) configured to vary a transmission period of at least one of the temperature data, the pressure data, or the acceleration data based on the acceleration data; and a transmitter (130) configured to transmit at least one of the temperature data, the pressure data, or the acceleration data corresponding to the transmission period.The apparatus of claim 1, wherein the processor (120) is configured to calculate a rotational speed of the tire (10) based on the acceleration data.The apparatus of claim 2, wherein the processor (120) is configured to vary the transmission period based on the rotational speed of the tire (10).The apparatus of any of claims 1 to 3, wherein the processor (120) is configured to determine the characteristics of the roadway surface based on the acceleration data.The apparatus of any one of claims 1 to 4, wherein the processor (120) is configured to determine whether the characteristics of the road surface change based on the acceleration data.The apparatus of claim 5, wherein the processor (120) is configured to control the transmitter (130) to transmit at least one of the pressure data, the temperature data, and the acceleration data based on the change in the road surface characteristics.The device according to any one of claims 1 to 6, wherein the memory (150) is configured to store the transmission period determined differently depending on the rotational speed of the tire (10).The apparatus of any one of claims 1 to 7, wherein the memory (150) is configured to store reference acceleration data corresponding to the road surface characteristics.The apparatus of claim 8, wherein the processor (120) is configured to determine the roadway characteristics by comparing the acceleration data to the reference acceleration data.A method of monitoring a tire using a sensor device (100), the method comprising: measuring pressure and temperature inside a tire (10) and acceleration depending on the tire rotation (10); storing pressure, temperature, and acceleration data measured by a sensor (110); varying a transmission period of at least one of the pressure data, the temperature data, or the acceleration data based on the acceleration data; and transmitting at least one of the pressure data, the temperature data, or the acceleration data corresponding to the transmission period.The method of claim 10, wherein varying a transmission period comprises: calculating a rotational speed of the tire (10) based on the acceleration data; and varying the transmission duration depending on the rotational speed of the tire (10).The method of any one of claims 10 or 11, wherein varying a transmission period comprises: determining whether roadway characteristics change based on the acceleration data; and controlling the transmitter (130) to transmit at least one of the pressure data, the temperature data, or the acceleration data based on the change in the roadway characteristics.The method according to any one of claims 11 or 12, further comprising: storing the transmission periods set differently depending on the rotational speed of the tire (10).The method of any of claims 12 or 13, wherein determining whether the roadway characteristics change comprises: storing reference acceleration data corresponding to the characteristics of the roadway characteristics.The method of claim 14, wherein determining whether roadway characteristics change comprises: determining the roadway characteristics by comparing the acceleration data to the reference acceleration data.

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