KR20190062791A - Tire provided with means for sensing a deformation - Google Patents

Abstract

The present invention provides a tire provided with a means for sensing deformation of the tire in real time while a vehicle is driven by a driver to directly deal with various damage and deformation. According to the present invention, the tire comprises a tire deformation measurement means mounted in the tire to measure deformation of the tire and display the measured deformation. The tire deformation measurement means comprises at least one strain gauge embedded in the tire, a signal processing unit connected to the strain gauge, a transmission unit transmitting a signal from the signal processing unit, and a power supply unit supplying power to the strain gauge. In particular, the strain gauge may be arranged between a belt and a cap ply forming the tire.

Description

[0001] The present invention relates to a tire equipped with a deformation detecting means,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire, and more particularly to a tire having deformation detecting means capable of detecting / measuring deformation / breakage.

Generally, a tire of a vehicle shares a total weight of the vehicle and supports the vehicle, and primarily absorbs impact from the road surface while driving, thereby providing a comfortable ride.

In addition, the tire plays a very important role as an important component of a vehicle, such as being capable of holding the centrifugal force when the vehicle turns and the lateral force generated when the vehicle tilts, and keeping the course of the vehicle constant have.

It is desirable to accurately measure the behavior (state) of a tire in a running vehicle in order to optimally perform the basic role and function of the tire as described above.

For example, in recent years, a tire pressure monitoring system (TPMS) has been installed in a vehicle to allow the driver to detect the internal air pressure / temperature condition of the tire in real time and to maintain the optimum air pressure of the vehicle Technology is applied.

However, the driver only senses the air pressure of the tire through such a system and can not grasp other basic conditions of the tire. Damage / deformation of the tire due to other factors other than the internal air pressure and the problems thereof are as follows.

When the tire is worn down to the wear limit line formed on the surface, the braking performance is remarkably lowered, and non-uniform / abnormal wear of the tire surface may cause steering steering failure. In addition, cracks on the side surface and the ground surface of the tire can cause punctures or ruptures of the tire during traveling, and tire side swelling also causes tire rupture during running.

Such a problem may cause deformation of the tire, and thus, if the deformation amount of the tire is measured in real time and the result is transmitted to the driver, the above phenomenon / problem can be prevented in advance.

Accordingly, it is an object of the present invention to provide a tire capable of immediately responding to various kinds of damage and deformation mentioned above by providing a deformation detecting means capable of detecting deformation of a tire in real time while the driver is driving.

The tire according to a preferred embodiment of the present invention for realizing the above object may include tire deformation amount measuring means which is installed inside to measure a deformation amount of the tire and can display the measured deformation amount.

The tire deformation measuring means may include at least one strain gauge embedded in the tire, a signal processing portion connected to the strain gage, a transmitting portion transmitting a signal from the signal processing portion, and a power supply portion supplying power to the strain gage, May be disposed between the belt constituting the tire and the cap ply.

In a preferred embodiment, a single strain gauge may be placed over the entire circumferential length of the tire, or multiple strain gauges may be placed at equal angular intervals.

On the other hand, it is preferable that some of the plurality of strain gauges are arranged in the same direction as the traveling direction of the vehicle, and some are arranged in the direction perpendicular to the traveling direction of the vehicle.

Further, the plurality of strain gauges are arranged such that at least one of the strain gauges always corresponds to the ground surface.

The tire according to the preferred embodiment of the present invention having the above structure can recognize the amount of deformation of the tire immediately during operation and allow the driver to check the tire and contribute to safe driving of the vehicle.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing an internal configuration of a general tire. Fig.
2 is a view showing a configuration of a strain gauge;
Fig. 3 is a schematic side view of a tire showing an example of a state in which the strain gauge shown in Fig. 2 is mounted; Fig.
Fig. 4 is a schematic side view of a tire showing an example of a state in which the strain gauge shown in Fig. 2 is mounted. Fig.
Figure 5 shows a strain gage and surrounding components.

Hereinafter, a tire according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

First, FIG. 1 shows an internal configuration of a general tire. The tire T includes a tread T1 which is the outermost member and a carcass T2 which is the innermost member.

The tread T1 is made of a material which is in contact with the road surface and which is excellent in abrasion resistance and cutting ability, can withstand external impacts, and has little heat generation. The carcass T2 is a cord layer composed of a fiber or steel and forms a skeleton of the tire. The carcass T2 is a portion that supports the load of the vehicle and is made of a material resistant to impact and excellent in fatigue resistance.

Between the tread T 1 and the carcass T 2 there is arranged a belt composed of steel wires or fibers and a cap ply T 4 which is a special cord paper located on the belt T 3 and fixing the belt T 3 do.

A preferred embodiment of the present invention is characterized by including deformation sensing means mounted on the tire (T) configured as described above and display means electrically connected to the deformation sensing means.

The deformation sensing means includes, but is not limited to, a strain gauge that converts the deformation of the tire into an electrical signal to measure the amount of deformation of the tire.

Strain refers to the deformation or strain / deformation of an object, which refers to the ratio of the length of the object stretched or shrunk to its original length when stretched or compressed.

Strain gauges can be distinguished by electrical strain gauges that electrically measure these strain / strain values and mechanical strain gauges that measure mechanically.

The electrical strain gauge measures the strain / strain using the electrical resistance that occurs when the object is deformed. The mechanical strain gage measures the amount of deformation of the object by mechanically measuring the minute distance change between two points .

An electric strain gauge 110 shown schematically in FIG. 2 includes a base 111 attached to an object (subject) using basically an adhesive or the like, a resistance wire 112 attached to the surface of the base 111 And a lead wire 113 connected to both ends of the resistance wire 112.

The base 111 and the resistance line 112 are deformed in the tensile direction (longitudinal direction) according to the deformation of the object, and when the length of the resistance line 112 is increased, the cross-sectional area is decreased and thus the electrical resistance is increased. This electrical change can be used to measure the strain of an object.

A preferred embodiment of the present invention is characterized in that the tire T is loaded with strain measurement means including the strain gauge 110 described above.

In a preferred embodiment of the present invention, the strain gauge 110 shown in Fig. 2 can be mounted on the tire T shown in Fig. 1, preferably embedded therein.

For example, the strain gage 110 may be disposed between the cap ply T4 and the belt T3, which constitute the tire T, so that the strain gage 110 may be placed in an external environment Can be minimized. Here, the strain gage 110 may be disposed between the belt T3 and the carcass T2, but in this case, the amount of deformation of the tread T1, which is the outermost member, by the belt T3, 110).

The number of the strain gauges 110 fixed in the state of being buried in the tire T is not limited.

That is, when a single strain gage 110 having a predetermined length is mounted on a single region of the tire T, only a local deformation of a single region of the tire can be detected. In order to compensate for this, it is preferable to dispose two or more strain gauges 110 in the tire T. [

 FIG. 3 is a schematic side view of a tire showing an example of a state in which the strain gauge 110 shown in FIG. 2 is mounted, in which four strain gauges 110 are arranged at equal circumferential intervals in the tire T FIG.

Here, it is important to specify the amount of tire deformation in the region of the tire T that is in contact with the ground. That is, the deformation of the tire T occurs most instantaneously when the tire T comes into contact with the overspeed preventing jaw or the obstacle, and it is therefore preferable to check the deformation amount of the tire at this time. In the structure in which a plurality of strain gauges 110 are mounted for this purpose, it is preferable to dispose a plurality of strain gauges 110 so that at least one strain gage 110 always corresponds to the ground.

 On the other hand, the number of strain gauges 110 can be adjusted so that tire deformation detection / measurement is performed over the entire area of the tire T, rather than a specific area, while the tire T of the vehicle is running. Therefore, when a single strain gauge 110 having a length corresponding to the full circumference length of the tire T is mounted in the tire T, the deformation amount of the entire tire T can be detected.

Here, when a plurality of strain gauges 110 are mounted in the tire T, the strain gage 110 can be arranged in the circumferential direction (vehicle running direction) or the width direction of the tire T, In the circumferential direction of the tire, and the rest in the width direction of the tire.

FIG. 4 is a schematic front view of a tire showing an example of a state in which the strain gauge shown in FIG. 2 is mounted, and a groove formed on the tread surface of the tire is also shown for convenience.

As shown in FIG. 4, the strain gauge 110 includes a first strain gauge 110A disposed in the running direction of the vehicle (i.e., the circumferential direction of the tire) and a direction perpendicular to the running direction And a second strain gauge 110B disposed in the second strain gauge 110B. Here, the directionality of the strain gage 110 is set based on the longitudinal direction of the resistance line 112 shown in Fig.

The first strain gage 110A measures the deformation amount of the tire T in the running direction, and the deformation amount in the width direction of the tire can be measured by the second strain gage 110B.

5 is a block diagram schematically showing a tire deformation measuring means 100 including the strain gage 110 shown in Fig.

A preferred tire deformation measuring means 100 of the present invention is embedded in a tire T and includes a strain gage 110 as described above, a signal processing unit 120 connected to the strain gage, A transmitter 130 and a power supply 140 for supplying power to the strain gage 110 may be included in the tire strain gauges 110. In Figure 4, (100) is shown.

On the other hand, a display unit electrically connected to the tire deformation measuring means 100 shown in Fig. 5 may be installed on a predetermined position of the vehicle, preferably the instrument panel in the vehicle dashboard.

The display unit includes a receiving unit connected to the transmitting unit 130 of the tire deformation measuring unit 100 in a wireless manner, for example, a Bluetooth method, a controller for processing a signal received from the receiving unit, and a display unit for displaying signals processed by the controller . On the other hand, the display unit having such a configuration is a general configuration, and thus a description thereof will be omitted.

The operation and function of the preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The deformation amount is measured at each strain gage 110 of the deformation measuring means 100 and the measured data is processed by the signal processing unit 120 and transmitted to the receiving unit of the display unit through the transmitting unit 130.

The receiving unit of the display unit receives the deformation measurement data transmitted from the transmission unit 120 of the deformation measuring unit 100, and this data is transmitted to the controller. The controller calculates the amount of deformation of the tire using the received deformation measurement data. Then, the calculated tire deformation value is transmitted to the display, and the driver can grasp the tire deformation value through the display unit.

At this time, if the computed tire deformation value exceeds a predetermined allowable value, that is, for example, when the tire T is excessively deformed by an external condition, the control unit displays such matters on the display unit, To recognize that deformation has occurred. Here, the tire deformation amount value can be suitably selected and displayed in accordance with the purpose of the tire, such as pressure, dynamic load, ground pressure, and the like.

On the other hand, the components of the strain measuring means, including the strain gauges described above, must be determined in terms of the associated design conditions (weight and position) so as not to affect the rotation of the tire during vehicle travel and to produce non-uniform centrifugal forces.

The foregoing description has described features of the preferred embodiments in order that those skilled in the art may understand the invention. Those skilled in the art will readily appreciate that the present invention can readily be used as a basis for designing or modifying other components and structures to accomplish the same objects of the embodiments and examples herein and / or to achieve the same advantages. Those skilled in the art will further appreciate that such equivalent constructions do not depart from the spirit and scope of the present invention and that various changes, substitutions and changes may be made therein without departing from the spirit and scope of the appended claims .

T: Tire
T3: Belt
T4: Cap fly
100: strain measuring means
110, 100A and 110B: strain gauges
120: Signal processor
130:

Claims (5)

In a vehicle tire,
And a tire deformation amount measurement means that is mounted inside the tire to measure a deformation amount of the tire and can display the measured deformation amount,
The tire deformation measuring means includes at least one strain gauge embedded in the tire, a signal processing portion connected to the strain gauge, a transmitting portion transmitting a signal from the signal processing portion, and a power supply portion supplying power to the strain gauge,
Wherein the strain gauge is disposed between the belt constituting the tire and the cap ply. The tire of claim 1, wherein a single strain gauge is disposed over the entire circumferential length of the tire. The tire according to claim 1, wherein a plurality of strain gauges are arranged at an equal interval. The vehicle tire according to claim 3, wherein some of the plurality of strain gauges are arranged in the same direction as the traveling direction of the vehicle, and a part of the strain gauges is arranged in a direction perpendicular to the traveling direction of the vehicle. 4. The tire of claim 3, wherein the plurality of strain gauges are arranged so that at least one of the strain gauges always corresponds to the ground.

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