Tire monitoring sensor device and tire monitoring method

Abstract

The present invention provides a tire monitoring sensor device comprising: a sensor which is installed inside a tire and measures the pressure and temperature inside the tire, and the acceleration of the tire due to rotation; a memory storing pressure data, temperature data, and acceleration data measured by the sensor; a processor that changes a transmission period of at least one of the pressure data, the temperature data, and the acceleration data based on the acceleration data; and the transmitter transmits at least one of the pressure data, the temperature data and the acceleration data according to the transmission period.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and the benefit of Korean Patent Application No. 10-2023-0173590, filed on December 4, 2023, and Korean Patent Application No. 10-2024-0053948, filed on April 23, 2024, the disclosures of which are incorporated herein by reference in their entirety. Technical Field

[0003] The present invention relates to a tire monitoring sensor device and a tire monitoring method, and more particularly to a tire monitoring sensor device and a tire monitoring method capable of changing a data transmission cycle. Background Art

[0004] Tires are the only vehicle components that come into contact with the road. They enable the vehicle to move by generating steering force, driving force and braking force, and therefore play a very important role in the vehicle's driving performance and safety.

[0005] The traditional tire pressure monitoring sensor (TPMS) consists of a pressure sensor and a temperature sensor. These sensors are used to measure the tire pressure, temperature, and battery voltage of the sensor, etc., and wireless communication is used to send the tire pressure status to the controller installed on the vehicle at a specific period.

[0006] Recently, a technology is being developed to measure tire-imposed load, tire mileage, road surface characteristics, etc. by installing a tire monitoring sensor (TMS) including a pressure sensor, a temperature sensor, and an acceleration sensor on the inside of a tire.

[0007] However, unlike conventional tire pressure monitoring sensors, tire monitoring sensors (TMS) need to measure more physical quantities and operate at a higher sampling rate for precise measurement. In addition, the data transmission cycle is shorter, so the sensor has the disadvantage of fast battery consumption. Summary of the invention

[0008] Problem that the invention aims to solve

[0009] The present invention is used to solve the above-mentioned problem, and its purpose is to provide a sensor device for monitoring tires, which uses acceleration data measured by the sensor to infer the tire rotation cycle, road surface condition and whether the road surface condition has changed, thereby changing the data sending cycle, so that only necessary data can be sent and unnecessary data can be prevented from being sent, thereby reducing the power consumption of the sensor and maximizing the battery life.

[0010] The technical problems of the present invention are not limited to the technical problems mentioned above, and ordinary technicians in the technical field to which the present invention belongs can clearly understand other technical problems not mentioned through the following description.

[0011] Means used to solve problems

[0012] To solve the above problems, the present invention provides a tire monitoring sensor, which includes: a sensor for measuring the internal pressure and temperature of the tire and the acceleration of the tire caused by rotation; a memory for storing pressure data, temperature data and acceleration data measured by the sensor; a processor for changing the sending period of at least one of the pressure data, temperature data and acceleration data based on the acceleration data; and a transmitter for sending at least one of the pressure data, temperature data and acceleration data according to the sending period.

[0013] The processor may calculate the rotation speed of the tire based on the acceleration data.

[0014] Additionally, the processor may change the transmission period based on the rotational speed of the tire.

[0015] Additionally, the processor may determine road surface characteristics based on the acceleration data.

[0016] Additionally, the processor may determine whether road surface characteristics have changed based on the acceleration data.

[0017] Additionally, the processor may control the transmitter based on a change in the road surface characteristic so that the transmitter transmits at least one of the pressure data, the temperature data, and the acceleration data.

[0018] In addition, the memory may store the transmission cycles that are set differently according to the rotation speed of the tire.

[0019] In addition, the memory may store reference acceleration data corresponding to road surface characteristics.

[0020] Additionally, the processor may determine road surface characteristics by comparing the acceleration data with reference acceleration data.

[0021] In addition, the present invention provides a tire monitoring method for monitoring a tire using a sensor device, which includes: a step of measuring the internal pressure, temperature and acceleration of the tire caused by rotation; a step of storing the pressure data, temperature data and acceleration data measured by the sensor; a step of changing and setting a sending cycle of at least one of the pressure data, temperature data and acceleration data based on the acceleration data; and a step of sending at least one of the pressure data, temperature data and acceleration data according to the sending cycle.

[0022] In addition, a tire monitoring method is provided, wherein the step of changing and setting the transmission cycle includes: the step of calculating the rotation speed of the tire based on the acceleration data; and the step of changing and setting the transmission cycle based on the rotation speed of the tire.

[0023] In addition, the step of changing and setting the transmission cycle may include: the step of determining whether the road surface characteristics have changed based on the acceleration data; and the step of controlling the transmitter based on the change in the road surface characteristics so that the transmitter sends at least one of the pressure data, temperature data and acceleration data.

[0024] Furthermore, according to the tire monitoring method of the present invention, the transmission cycles set to be different according to the rotation speed of the tire can be stored in the memory.

[0025] In addition, the step of determining whether the road surface characteristic has changed may include the step of storing reference acceleration data corresponding to the road surface characteristic.

[0026] In addition, the step of determining whether the road surface characteristic has changed may include the step of determining the road surface characteristic by comparing the acceleration data with reference acceleration data.

[0027] Effects of the Invention

[0028] According to the present invention, the acceleration data measured by the sensor can be used to infer the tire rotation cycle, road surface condition and whether the road surface condition has changed, thereby changing the data sending cycle, so that only necessary data can be sent and unnecessary data can be prevented from being sent, thereby reducing the power consumption of the sensor and maximizing the battery life.

[0029] The effects of the present invention are not limited to the above-mentioned effects, and should be understood to include all effects that can be derived from the constitution of the invention described in the detailed description of the present invention or the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and other objects, features and advantages of the present disclosure will become more apparent to those skilled in the art by describing in detail exemplary embodiments of the present disclosure with reference to the accompanying drawings, in which:

[0031] Figure 1 is a block diagram of a tire monitoring sensor device according to an embodiment of the present invention.

[0032] Figure 2 FIG. 1 is a diagram showing a posture of a tire monitoring sensor device according to an embodiment of the present invention installed on a tire.

[0033] Figure 3 FIG. 1 is a diagram for explaining a method for measuring a tire additional load by a tire monitoring sensor device according to an embodiment of the present invention.

[0034] Figure 4 FIG. 1 is a diagram for explaining a method of measuring a rotation speed of a tire by a tire monitoring sensor device according to an embodiment of the present invention.

[0035] Figure 5 FIG. 1 is a diagram for explaining a method of measuring a road surface condition by a tire monitoring sensor device according to an embodiment of the present invention.

[0036] Figure 6 FIG. 1 is a diagram for explaining a method for determining a change in road surface characteristics by a tire monitoring sensor device according to an embodiment of the present invention.

[0037] Figure 7 is a flow chart of a tire monitoring method according to an embodiment of the present invention.

[0038] Figure 8 and Fig. 9 4 is a flowchart of a method for changing and setting a data transmission period according to an embodiment of the present invention. DETAILED DESCRIPTION

[0039] Below, the embodiments of the present disclosure will be described in detail so that those skilled in the art can easily implement the embodiments. The present disclosure can be implemented in a variety of different forms and is not limited to the embodiments described herein. In order to clearly describe the present disclosure, parts not related to the description are omitted in the accompanying drawings, and the same or similar parts are represented by the same reference numerals throughout the specification.

[0040] The words and terms used in the specification and claims should not be restrictively interpreted as their ordinary meanings or dictionary meanings, but should be interpreted as meanings and concepts consistent with the technical spirit of the present disclosure in accordance with the principle that the inventor is able to define terms and concepts to best describe his invention.

[0041] In the specification, it should be understood that terms such as “including” or “having” are intended to specify the existence of the features, numbers, steps, operations, components, parts or their combinations described in the specification, and do not exclude the possibility of the existence or addition of one or more other features, numbers, steps, operations, components, parts or their combinations.

[0042] Figure 1 is a block diagram of a tire monitoring sensor device according to an embodiment of the present invention, Figure 2 FIG. 2 is a diagram showing a tire monitoring sensor device according to an embodiment of the present invention installed on a tire. Figure 2 , Figure 3 as well as Figure 5 Medium, F x is the force on the X axis, F z is the force on the Z axis.

[0043] like Figure 1 As shown, a tire monitoring sensor device 100 according to an embodiment of the present invention may include a sensor 110 , a processor 120 , a transmitter 130 , a battery 140 and a memory 150 .

[0044] The tire monitoring sensor device 100 according to the embodiment of the present invention can be configured inside the tire 10, but is not limited thereto. Only the sensor 110 can be configured inside the tire 10, while the processor 120, transmitter 130, battery 140 and memory 150 are configured around the tire 10.

[0045] The sensor 110 may include: a pressure sensor for measuring the pressure inside the tire 10 ; a temperature sensor for measuring the temperature inside the tire 10 ; and an acceleration sensor for measuring the acceleration of the tire 10 caused by rotation.

[0046] The sensor 110 may be a tire monitoring sensor including a pressure sensor, a temperature sensor, and an acceleration sensor, such as Figure 2 As shown, it can be installed on the inner liner (Tire InnerLiner) of the tire 10.

[0047] The memory 150 may store pressure data, temperature data, and acceleration data measured by the sensor 110 .

[0048] The processor 120 may change a transmission cycle of at least one of the pressure data, the temperature data, and the acceleration data based on the acceleration data.

[0049] The transmitter 130 may transmit at least one of the pressure data, the temperature data, and the acceleration data to a controller installed in the vehicle and an external server according to the transmission cycle changed and set by the processor 120 .

[0050] At this time, the transmitter 130 may communicate with the controller in a short-range wireless communication manner, for example, the short-range wireless communication manner may be a Bluetooth Low Energy (BLE) manner.

[0051] Thus, the controller or external server can monitor the vehicle's tire pressure, temperature, tire mileage, tire additional load, and characteristics of the road surface on which the vehicle is traveling based on pressure data, temperature data, and acceleration data.

[0052] The controller may display the vehicle's tire pressure, temperature, tire mileage, tire additional load, and characteristics of the road surface on which the vehicle is traveling on a display provided on the vehicle.

[0053] The battery 140 may provide power to the sensor 110 , the processor 120 , and the transmitter 130 .

[0054] In addition, since the sensor 110 as a tire monitoring sensor needs to measure a large number of physical quantities and needs to operate at a higher sampling rate for precise measurement, and the data transmission cycle is short, it has the disadvantage of fast consumption of the battery 140.

[0055] Therefore, the tire monitoring sensor device according to the embodiment of the present invention aims to reduce the power consumption of the sensor 110 to the maximum extent by changing the data transmission cycle, thereby increasing the battery life.

[0056] To this end, the tire monitoring sensor device according to the embodiment of the present invention can use the acceleration data measured by the sensor 110 to infer the rotation period of the tire 10 and the road surface characteristics during vehicle driving, so as to determine the data transmission period.

[0057] Preventing unnecessary data transmission in this manner can reduce power consumption of the sensor 110 , thereby maximizing the life of the battery.

[0058] Figure 3 FIG. 1 is a diagram for explaining a method for measuring a tire additional load by a tire monitoring sensor device according to an embodiment of the present invention.

[0059] like Figure 3 As shown, the sensor 110 can measure the Z-axis acceleration Acc. Z. The memory 150 can store acceleration data in the form of a graph waveform showing the Z-axis acceleration Acc. Z measured by the sensor 110 changing with time.

[0060] When the vehicle travels and the tire 10 rotates along the road surface, the tire 10 has a region that contacts the road surface and a region that is deformed due to the contact with the road surface.

[0061] In the tire 10, the length of the area in contact with the road surface (Contact Length) is the length between point B and point D, and the length of the area deformed by contact with the road surface (Deformation Length) is the length between point A and point E. At this time, point C is located between point B and point D.

[0062] The Z-axis acceleration Acc.Z is the smallest at points A and E, and the largest at point C. In addition, the Z-axis acceleration Acc.Z at point B is the middle value of the Z-axis acceleration Acc.Z at points A and C, and the Z-axis acceleration Acc.Z at point D is the middle value of the Z-axis acceleration Acc.Z at points A and E.

[0063] That is, the Z-axis acceleration Acc.Z has a minimum value at point A, gradually increases from point B to point C, has a maximum value at point C, then gradually decreases from point D to point E, and has a minimum value at point E.

[0064] The processor 120 may use the Z-axis acceleration Acc.Z to find the positions of point B and point D, and thereby calculate the length of the area where the tire 10 contacts the road surface (Contact Length), thereby estimating the additional tire load.

[0065] Specifically, the processor 120 can infer that: the longer the length of the area where the tire 10 contacts the road surface (Contact Length), the greater the additional tire load; and the smaller the length of the area where the tire 10 contacts the road surface (Contact Length), the smaller the additional tire load.

[0066] The memory 150 may store a reference tire additional load according to the length (Contact Length) of the area of ​​the tire 10 in contact with the road surface, and the processor 120 may estimate the tire additional load based on the reference tire additional load stored in the memory 150 .

[0067] Figure 4 FIG. 1 is a diagram for explaining a method of measuring a rotation speed of a tire by a tire monitoring sensor device according to an embodiment of the present invention.

[0068] Reference Figure 4 When the vehicle is running and the tire 10 is rotating along the road surface, the pattern of the Z-axis acceleration Acc.Z will repeat at a constant period according to the rotation speed of the tire 10.

[0069] For example, when the tire 10 rotates at a first speed, the graph of the Z-axis acceleration Acc.Z will repeat with a first rotation period (Rotation period, A) according to the first speed; when the tire 10 rotates at a second speed slower than the first speed, the graph of the Z-axis acceleration Acc.Z will repeat with a second rotation period (Rotation period, B) slower than the first rotation period (Rotation period, A) according to the second speed.

[0070] The processor 120 may calculate the rotation speed of the tire 10 based on the acceleration data.

[0071] Specifically, the processor 120 may calculate the time between the maximum values ​​of the graph of the Z-axis acceleration Acc.Z as the rotation period.

[0072] Also, the processor 120 may calculate the rotation speed Vt of the tire 10 by applying the rotation period to the following Formula 1.

[0073] [Formula 1]

[0074]

[0075] Here, Rt is the radius of the tire 10 , and Pr is the rotation period of the tire 10 .

[0076] The processor 120 may change a transmission cycle of at least one of the temperature data, the pressure data, and the acceleration data of the tire 10 based on the rotation speed of the tire 10 .

[0077] Specifically, the memory 150 may store different transmission cycles set according to the rotation speed of the tire 10 , and the processor 120 may control the transmitter 130 so that the transmitter 130 transmits data at the transmission cycle corresponding to the rotation speed of the tire 10 stored in the memory 150 .

[0078] The transmission cycle can divide the rotation speed into multiple intervals and set them.

[0079] The memory 150 may store a reference X-axis acceleration Acc.X pattern for each rotation speed of the tire 10 .

[0080] The processor 120 determines the rotation speed of the tire 10 by comparing the X-axis acceleration pattern measured by the sensor 110 with a reference X-axis acceleration pattern stored in the memory 150 .

[0081] In addition, the processor 120 may control the transmitter 130 so that the transmitter 130 transmits data based on a change in a rotation speed interval of the tire 10 .

[0082] This is because when the rotation speed range of the tire 10 changes, the external force applied to the tire 10 increases, and the necessity to monitor the tire 10 increases.

[0083] In addition, the processor 120 may change the transmission cycle in proportion to the rotation speed of the tire 10 .

[0084] For example, as the rotation speed of the tire 10 increases, the processor 120 may set the transmission period to be shorter.

[0085] Since the external force applied to the tire 10 increases as the rotation speed of the tire 10 increases, and thus the necessity to monitor the tire 10 increases, this is to accurately measure the state of the tire 10 by shortening the transmission cycle.

[0086] In contrast, as the rotation speed of the tire 10 decreases, the processor 120 may set the transmission cycle to be shorter.

[0087] This is to prevent unnecessary data from being transmitted by extending the transmission cycle, since as the rotation speed of the tire 10 decreases, the external force applied to the tire 10 also decreases, and thus the necessity to monitor the tire 10 decreases.

[0088] As described above, the tire monitoring sensor device according to the embodiment of the present invention utilizes the acceleration data measured by the sensor 110 to infer the rotation period of the tire 10 and determine the data sending period, so that only necessary data can be sent and unnecessary data can be prevented from being sent, thereby reducing the power consumption of the sensor 110 and maximizing the battery life.

[0089] Figure 5 FIG. 1 is a diagram for explaining a method of measuring a road surface condition by a tire monitoring sensor device according to an embodiment of the present invention.

[0090] Reference Figure 5 The processor 120 may determine the road surface characteristics based on the acceleration data, wherein the road surface characteristics may include a full aquaplaning state, a partial aquaplaning state, a dry state, a state with potholes, and a bump, etc.

[0091] Figure 5 2 shows the X-axis acceleration Acc.X generated by the rotation of the tire when the road surface conditions are in a full aquaplaning state (Full aquaplaning), a partial aquaplaning state (Partial aquaplaning) and a dry state (Dry).

[0092] like Figure 5 As shown, when the road surface is in a completely hydroplaning state, during the rotation of the tire 10, the X-axis acceleration Acc.X at the point X where the tire 10 contacts the hydroplaning a is 1 The minimum value of the interval is obtained at the point X where the tire 10 contacts the road surface. 2 has the maximum value of the interval.

[0093] In addition, when the road surface is partially in the hydroplaning state, during the rotation of the tire 10, the X-axis acceleration Acc.X at the point X where the tire 10 contacts the hydroplaning a is 1 The first interval minimum value is obtained at the point X where the tire 10 begins to contact the road surface. 2 The second interval minimum value is obtained at the point X where the tire 10 ends contacting the road surface. 3 has the maximum value of the interval.

[0094] The processor 120 can calculate the point X at which the tire 10 starts to contact the road surface. 2 The point X at which the tire 10 ends contact with the road surface 3 The distance between the two vehicles can be used to determine the degree of hydroplaning on the road surface, and the data transmission cycle can be changed according to the degree of hydroplaning on the road surface.

[0095] The memory 150 may store a reference X-axis acceleration Acc.X pattern for each hydroplaning height of the road surface.

[0096] The processor 120 may determine the degree of hydroplaning of the road surface by comparing the X-axis acceleration graph measured by the sensor 110 with a reference X-axis acceleration graph stored in the memory 150 .

[0097] In addition, when the road surface is dry, the X-axis acceleration Acc.X at the point X where the tire 10 starts to contact the road surface is 1 The tire 10 ends contacting the road surface at point X. 2 has the maximum value of the interval.

[0098] When a road surface has potholes and bumps, it has a characteristic X-axis acceleration Acc.X graph that is different from that of a flat road surface.

[0099] As described above, the processor 120 may change the data transmission cycle according to the road surface characteristics. The memory 150 may store the data transmission cycle set for each road surface characteristic.

[0100] For example, the processor 120 may set the transmission period of the data when the road surface is in a completely hydroplaning state to be shorter than the transmission period when the road surface is in a dry state.

[0101] As described above, according to the tire monitoring sensor device of an embodiment of the present invention, since the external force applied to the tire 10 is different depending on the road surface condition, the sending cycle is set differently according to the road surface condition, so that only necessary data can be sent and unnecessary data can be prevented from being sent, thereby reducing the power consumption of the sensor 110 and maximizing the battery life.

[0102] The memory 150 can store a reference X-axis acceleration Acc.X pattern for each road surface characteristic. The reference X-axis acceleration Acc.X pattern reflects the type and diameter of the tire 10 and can be set differently for each tire 10 according to the rotation speed even for the same road surface characteristic.

[0103] For example, the reference X-axis acceleration Acc.X graph may be acceleration graphs corresponding to a full aquaplaning state, a partial aquaplaning state, a dry state, a state with a pothole, and a state with a bump.

[0104] The processor 120 may determine the road surface characteristics by comparing the X-axis acceleration graph measured by the sensor 110 with a reference X-axis acceleration graph stored in the memory 150 .

[0105] For example, when the similarity between the X-axis acceleration graph measured by the sensor 110 and the reference X-axis acceleration graph in the complete hydroplaning state is greater than a reference value (eg, 80%), the processor 120 may infer the current road surface state as the complete hydroplaning state.

[0106] In addition, the processor 120 may control the transmitter 130 by inferring the road surface state, so that the transmitter 130 transmits data whenever an event occurs on the road surface (for example, whenever potholes and bumps are inferred to exist).

[0107] This is because when an event occurs on the road surface, the external force applied to the tire 10 increases, and thus the necessity to monitor the tire 10 increases.

[0108] Figure 6 FIG. 1 is a diagram for explaining a method for determining a change in road surface characteristics by a tire monitoring sensor device according to an embodiment of the present invention.

[0109] The processor 120 may determine whether the road surface characteristics have changed based on the acceleration data.

[0110] Specifically, refer to Figure 6 The processor 120 can determine the change from the dry state to the full aquaplaning state based on the X-axis acceleration graph.

[0111] The processor 120 may determine whether the road surface characteristics have changed by comparing the X-axis acceleration graph measured by the sensor 110 with a reference X-axis acceleration graph stored in the memory 150 .

[0112] In addition, the processor 120 may control the transmitter 130 based on whether the road surface characteristic changes, so that the transmitter 130 transmits at least one of the pressure data, the temperature data, and the acceleration data.

[0113] This is because, when the road surface characteristics change, the external force applied to the tire 10 increases, and thus the necessity to monitor the tire 10 increases.

[0114] As described above, the tire monitoring sensor device according to the embodiment of the present invention can use the acceleration data measured by the sensor 110 to infer whether the road surface condition has changed, and thereby determine the data sending cycle, so as to only send necessary data and prevent the sending of unnecessary data, thereby reducing the power consumption of the sensor 110 and maximizing the battery life.

[0115] Figure 7 is a flowchart of a tire monitoring method according to an embodiment of the present invention, Figure 8 and Fig. 9 4 is a flowchart of a method for changing and setting a data transmission period according to an embodiment of the present invention.

[0116] Below, we will refer to Figures 7 to 9 A tire monitoring method according to an embodiment of the present invention is described.

[0117] According to the tire monitoring method of the embodiment of the present invention, first, the reference acceleration data corresponding to the road surface characteristics and set to different transmission cycles according to the rotation speed of the tire 10 and the road surface characteristics are stored in the memory 150.

[0118] Then, as a method of monitoring the tire 10 using the sensor device 110 , first, the pressure and temperature inside the tire 10 and the acceleration of the tire 10 caused by the rotation are measured (step S10 ).

[0119] Thereafter, the pressure data, temperature data, and acceleration data measured by the sensor 110 are stored in the memory 150 (step S20 ).

[0120] Thereafter, the transmission cycle of at least one of the pressure data, the temperature data, or the acceleration data is changed and set based on the acceleration data measured by the sensor 110 (step S30 ).

[0121] At this time, if Figure 8 As shown, the rotation speed of the tire 10 can be calculated based on the acceleration data (step S31), and the transmission cycle can be changed and set based on the rotation speed of the tire 10 (step S32).

[0122] That is, the rotation period of the tire 10 is calculated using the repetitive pattern of the acceleration data, and the rotation speed of the tire 10 is calculated using the rotation period.

[0123] In addition, the transmitter 130 may be controlled to transmit data at a transmission cycle corresponding to the rotation speed of the tire 10 stored in the memory 150 .

[0124] The transmission cycle can divide the rotation speed into multiple intervals and set them.

[0125] In addition, the transmitter 130 may be controlled to transmit data based on the change in the rotation speed range of the tire 10. This is because when the rotation speed range of the tire 10 changes, the external force applied to the tire 10 increases, and the need to monitor the tire 10 increases.

[0126] Furthermore, the transmission cycle may be changed in proportion to the rotation speed of the tire 10 .

[0127] For example, the transmission cycle may be set to be shorter as the rotation speed of the tire 10 increases. Since the external force applied to the tire 10 increases as the rotation speed of the tire 10 increases, and thus the necessity of monitoring the tire 10 increases, this is to accurately measure the state of the tire 10 by shortening the transmission cycle.

[0128] On the contrary, the transmission cycle can be set to be shorter as the rotation speed of the tire 10 decreases. Since the external force applied to the tire 10 decreases as the rotation speed of the tire 10 decreases, and thus the necessity of monitoring the tire 10 decreases, this is to prevent unnecessary data from occurring by extending the transmission cycle.

[0129] As described above, according to the tire monitoring method of the embodiment of the present invention, the acceleration data measured by the sensor 110 is used to infer the rotation period of the tire 10 and determine the data sending period, so that only necessary data can be sent and unnecessary data can be prevented from being sent, thereby reducing the power consumption of the sensor 110 and maximizing the battery life.

[0130] In addition, the data transmission cycle may be changed according to the road surface characteristics. The memory 150 may store the data transmission cycle set for each road surface characteristic.

[0131] For example, the transmission cycle of data when the road surface is in a completely hydroplaning state may be set to be shorter than the transmission cycle when the road surface is in a dry state.

[0132] As described above, according to the tire monitoring method of an embodiment of the present invention, since the external force applied to the tire 10 is different depending on the road surface condition, the sending cycle is formed to be different according to the road surface condition, so that only necessary data can be sent and unnecessary data can be prevented from occurring, thereby reducing the power consumption of the sensor 110 and maximizing the battery life.

[0133] The memory 150 may store a reference acceleration pattern for each road surface characteristic. The reference acceleration pattern reflects the type and diameter of the tire 10 and may be set differently for each tire 10 according to the rotation speed even for the same road surface characteristic.

[0134] For example, the reference acceleration pattern may be acceleration patterns corresponding to a full aquaplaning state, a partial aquaplaning state, a dry state, a state with a pothole, and a state with a bump, respectively.

[0135] Here, the road surface characteristics may be determined by comparing the acceleration pattern measured by the sensor 110 with a reference acceleration pattern stored in the memory 150 .

[0136] For example, when the similarity between the acceleration pattern measured by the sensor 110 and a reference acceleration pattern in a complete hydroplaning state is greater than a reference value (eg, 80%), the current road surface state may be estimated to be a complete hydroplaning state.

[0137] Additionally, the transmitter 130 may be controlled to transmit data whenever a condition occurs on the road surface (eg, whenever potholes and bumps are presumed to exist).

[0138] This is because when an event occurs on the road surface, the external force applied to the tire 10 increases, and thus the necessity to monitor the tire 10 increases.

[0139] In addition, it is determined whether the road surface characteristics have changed based on the acceleration data (step S33), and the transmitter 130 is controlled based on the change in the road surface characteristics so that the transmitter 130 transmits at least one of the pressure data, the temperature data and the acceleration data. (step S34)

[0140] At this time, 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.

[0141] Thereafter, the transmitter 130 transmits at least one of the pressure data, the temperature data, and the acceleration data according to a transmission cycle (step S40 ).

[0142] At this time, the transmitter 130 may transmit data to the controller installed in the vehicle and the external server according to the transmission cycle changed and set by the processor 120 .

[0143] Thus, the controller or external server can monitor the vehicle's tire pressure, temperature, tire mileage, tire additional load, and characteristics of the road surface on which the vehicle is traveling, etc. based on pressure data, temperature data, and acceleration data.

[0144] The controller may display the vehicle's tire pressure, temperature, tire mileage, tire additional load, and characteristics of the road surface on which the vehicle is traveling on a display provided on the vehicle.

[0145] As described above, according to the tire monitoring method of an embodiment of the present invention, the acceleration data measured by the sensor 110 is used to infer the rotation cycle of the tire 10, the road surface state, and whether the road surface state has changed, and thereby change the data sending cycle, so that only necessary data can be sent and unnecessary data can be prevented from being sent, thereby reducing the power consumption of the sensor 110 and maximizing the battery life.

[0146] It should be understood that the effects of the present disclosure are not limited to the above-mentioned effects, and include all effects that can be inferred from the inventive configuration described in the detailed description of the present disclosure or the claims.

[0147] Although the embodiments of the present disclosure have been described, the spirit of the present disclosure is not limited by the embodiments presented in the specification. As long as those skilled in the art understand the spirit of the present invention, they can easily propose other embodiments within the scope of the same spirit by adding, changing, deleting or adding parts, but this will also be included in the scope of the spirit of the present invention.

Claims

1. A tire monitoring sensor device, characterized in that: include: a sensor to measure temperature and pressure of the tire and acceleration of said tire due to rotation; A memory for storing temperature data, pressure data, and acceleration data measured by the sensor; a processor, configured to change a transmission period of at least one of the temperature data, the pressure data, and the acceleration data based on the acceleration data; as well as A transmitter transmits at least one of the temperature data, the pressure data, and the acceleration data according to the transmission period.

2. The tire monitoring sensor device according to claim 1, wherein: The processor calculates a rotational speed of the tire based on the acceleration data.

3. The tire monitoring sensor device according to claim 2, wherein: The processor changes the transmission period based on a rotation speed of the tire.

4. The tire monitoring sensor device according to claim 1, wherein: The processor determines road surface characteristics based on the acceleration data.

5. The tire monitoring sensor device according to claim 1, wherein: The processor determines whether a road surface characteristic has changed based on the acceleration data.

6. The tire monitoring sensor device according to claim 5, wherein: The processor controls the transmitter based on the change condition of the road surface characteristic so that the transmitter transmits at least one of the temperature data, the pressure data, and the acceleration data.

7. The tire monitoring sensor device according to claim 6, wherein: The memory stores the transmission cycle that is set differently according to the rotation speed of the tire.

8. The tire monitoring sensor device according to claim 7, wherein: The memory stores reference acceleration data corresponding to the road surface characteristics.

9. The tire monitoring sensor device according to claim 8, wherein: The processor determines the road surface characteristic by comparing the acceleration data with the reference acceleration data.

10. A tire monitoring method, which uses a sensor device to monitor a tire, characterized in that: include: The step of measuring the pressure and temperature inside the tire and the acceleration of the tire caused by rotation; The step of storing pressure data, temperature data and acceleration data measured by the sensor; A step of changing and setting a transmission cycle of at least one of the pressure data, the temperature data, and the acceleration data based on the acceleration data; as well as The step of sending at least one of the pressure data, the temperature data and the acceleration data according to the sending cycle.

11. The tire monitoring method according to claim 10, wherein: The steps to change and set the sending cycle include: a step of calculating a rotational speed of the tire based on the acceleration data; and The step of changing and setting the transmission cycle based on the rotation speed of the tire.

12. The tire monitoring method according to claim 10, wherein: The steps to change and set the sending cycle include: A step of determining whether a road surface characteristic has changed based on the acceleration data; and The transmitter is controlled based on the change condition of the road surface characteristic so that the transmitter transmits at least one of the pressure data, the temperature data, and the acceleration data.

13. The tire monitoring method according to claim 11, wherein: Also includes: The step of storing the transmission cycle that is set differently according to the rotation speed of the tire in a memory.

14. The tire monitoring method according to claim 12, wherein: The steps of determining whether the road surface characteristics have changed include: The step of storing reference acceleration data corresponding to the road surface characteristics.

15. The tire monitoring method according to claim 14, wherein: The steps of determining whether the road surface characteristics have changed include: A step of judging the road surface characteristics by comparing the acceleration data with the reference acceleration data.

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