KR102039267B1 - Apparatus for measuring the tire tread - Google Patents

Abstract

According to the present invention, provided is a device for measuring a tire tread comprising: a vertical detection means for scanning a tire tread surface of a stopped vehicle in an up and down direction to determine a tread surface perpendicular to an irradiation path of a distance measuring part; and a wear degree determining means for determining a wear degree of the tire tread on the basis of the determined vertical tread surface. According to the present invention, in measuring the wear of the tire tread, a tire can be measured in a mounted state without having to remove the tire from a vehicle body, and is capable of securing a reliability of determining the tire wear by fundamentally preventing an error formed due to hand trembling and the like through manual work such that a disadvantage of not being able to secure a reliability of determining the wear degree is not obtained.

Description

Tire tread measuring device {APPARATUS FOR MEASURING THE TIRE TREAD}

The present invention relates to a tire tread measuring device, and more particularly to a tire tread measuring device that can measure the depth and wear of the tire tread.

A tire is a very important factor in driving a vehicle such as driving force of a vehicle while cushioning vibration according to road conditions, and the life of a tire is related to the amount of tread wear caused by driving a car. The tire tread is made of a rubber layer, and various tread patterns are formed on the outer surface. The tread pattern consists of a lateral groove (groove) and a longitudinal groove, and functions to transmit rotation or driving force of the vehicle, respectively. Tread patterns vary in wear and area depending on mileage and condition. Accurately measuring the tread condition is a basic judgment data in determining the replacement cycle of a tire.

A tire tread measuring apparatus using a line scanner is disclosed in Korean Patent Laid-Open Publication No. 10-2008-0077812 with respect to a technique for measuring a wear amount and a wear area of a tire tread. The prior art measures the shape and depth of the tire tread based on the information reflected from the tire trend, and rotates the tire at constant speed by the rotating motor during tread measurement. However, the prior art has a problem that it is impossible to measure the tire tread of the vehicle parked on the road because the tire must be rotated when measuring the tire tread.

On the other hand, the measurer manually measures the degree of wear of the tread by contacting the depth gauge on the surface of the tire tread, but there is a problem in that the measured value (in mm) is unreliable due to the skill of the measurer or hand shaking.

Republic of Korea Patent Publication No. 10-2008-0077812

The present invention has been made to solve the above-described problems, an object of the present invention is to provide a tire tread measuring device that can provide reliable data on the determination of replacement of tires by measuring the tread depth and wear of the vehicle is stopped It is to.

In order to solve the above problems, the tire tread measuring device according to an embodiment of the present invention is a position where the one surface of the vehicle tire tread and the distance measuring means perpendicular to the vehicle to measure the exact depth of the groove (groove) of the tire tread After adjusting the position, the distance measuring means can be moved in the horizontal direction to measure the state of the tire tread. The distance measuring means may be a device capable of measuring a distance between the measuring origin and the tire tread such as a laser sensor, a line laser sensor, a line scanner, an infrared sensor, an ultrasonic sensor, and the like. Therefore, since the distance measuring means and the tire tread to be measured are initially set in the vertical state, the thickness of the remaining tread can be measured by subtracting the tread groove distance value from the tread surface distance value obtained by the horizontal movement of the distance measuring means. have.

According to an embodiment of the present invention, when the variation in the tread thickness measured by the depth measuring means is compared with each other and the deviation of both areas of the tread is equal to or more than the preset deviation value, it is determined that there is uneven wear, and the thickness of the thread is preset reference thickness In the following cases, it may be displayed to require replacement of the tire.

According to an embodiment of the present invention, the tide tread measuring device transmits tire tread wear information including measured tire tread thickness information and tire replacement determination information to a user's mobile terminal, thereby allowing the user to immediately determine whether to replace the tire. You can drive safely.

According to the present invention as described above, in measuring the tire tread wear can be measured in the mounted state without the need to separate the tire from the vehicle body, the error caused by hand shake occurs through the manual work to ensure the reliability of the wear level judgment By avoiding the disadvantage of being unable to do so, it is possible to secure the reliability of tire wear judgment.

In addition, since it is portable, it can be used anywhere if it satisfies the condition of a stopped vehicle. For example, it can be used when breaking the law due to tire wear, and it is a mechanical device rather than manual work. The argument with the driver about whether or not it can be prevented at the source.

1 is a schematic diagram of measuring a parked car tire tread wear according to an embodiment of the present invention using a tire tread measuring device.
Figure 2 is a block diagram of a tire tread measuring apparatus according to an embodiment of the present invention.
3 is a schematic diagram illustrating an operation of detecting a tire tread surface perpendicular to the distance measuring unit by scanning the distance measuring unit in the circumferential direction of the tire tread according to an exemplary embodiment of the present invention.
4 is a schematic diagram illustrating an operation of measuring tire wear by horizontally moving a distance measuring unit along a set vertical tread surface according to an exemplary embodiment of the present invention.
5A and 5B are diagrams for explaining the operation of the tire tread measuring apparatus according to an embodiment of the present invention.
6 is a view illustrating a process of transmitting tire tread wear information to a mobile terminal according to an embodiment of the present invention.
7 is a diagram illustrating a screen on which tread wear information is displayed on a user mobile terminal according to an embodiment of the present invention.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. Effects and features of the present invention, and methods of achieving them will be apparent with reference to the embodiments described below in detail together with the drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various forms. In the following embodiments, the terms first, second, etc. are used for the purpose of distinguishing one component from other components rather than a restrictive meaning. Also, the singular forms “a”, “an” and “the” include plural forms unless the context clearly indicates otherwise. In addition, the terms including or have means that the features or components described in the specification are present, and does not preclude the possibility of adding one or more other features or components. In addition, in the drawings, components may be exaggerated or reduced in size for convenience of description. For example, the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of description, and thus the present invention is not necessarily limited to the illustrated.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, and the same or corresponding components will be denoted by the same reference numerals, and redundant description thereof will be omitted. .

1 is a schematic diagram of measuring a parked car tire tread wear according to an embodiment of the present invention using a tire tread measuring device.

As shown in FIG. 1, the tire tread measuring apparatus 1000 may be disposed at a side surface of a tire of a stopped vehicle to measure tread wear and wear. Although not shown, the tire tread measuring apparatus 1000 is disposed on a position where the tire is disposed on two rollers and faces a tire located on the roller (for example, a lower roller) in order to measure a tire condition of an automobile inspection station. Uneven wear can be measured.

The tire tread measuring apparatus 1000 may be disposed on the same line as the ground on which the tire contacts, and the distance measuring unit may be disposed to face a predetermined surface area of the tire tread 10. The tire tread measuring apparatus 1000 does not rotate the tire, but measures the distance between the light source (center) of the distance measuring unit and the surface of the tire tread while the tire is stopped and primarily irradiates from the light source of the distance measuring unit in determining the wear level of the tire. The wear of the tire can be measured by determining the face (point) perpendicular to the tire tread surface and then scanning the surface of the tread in the horizontal direction with respect to the vertically determined tread face (point). The tire tread measuring apparatus 1000 may measure the tire tread as it is mounted on the vehicle without having to separate or separate the tire from the vehicle body. The tire tread measuring apparatus 1000 does not need to rotate the tire when measuring a specific tread area of the tire, but may be applied to a tire that rotates when measuring the entire tire tread area. In general, in order to measure tire treads at an automobile inspection station, each tire is seated between two rollers, and then started and rotated. However, even in this case, since the laser irradiated from the laser sensor is simply facing the tire tread and not the vertical direction, it is difficult to accurately measure the depth of the groove formed in the tire tread, and when the tire diameter actually mounted on the vehicle is different, In addition, errors in measuring the depth of the tread grooves will reduce the reliability. In addition, since errors caused by hand shaking occur during tire tread measurement through manual labor, it is not possible to secure reliability in determining wear. Therefore, in order to secure the reliability of tire wear by accurately measuring the depth of the groove of the tire tread, the distance measuring unit is firstly adjusted so that the irradiation path output from the distance measuring unit when the tire tread is measured and the tire tread surface are perpendicular to each other. The tire tread measurement with reliability may be described below with reference to FIGS. 2 to 5B.

Figure 2 is a block diagram of a tire tread measuring apparatus according to an embodiment of the present invention.

The tire tread measuring apparatus 1000 includes a distance measuring unit 510 for measuring a distance by irradiating light (laser) on the tire tread surface and measuring reflected light, and scanning the distance measuring unit in a circumferential direction with respect to the tire tread surface. Tilting unit 540 to operate, the vertical determination unit 520 to determine the vertical tread plane by judging the output value output from the distance measuring unit by the operation of the tilting unit and overall control such as driving the motor for tire tread measurement It may include a control unit to perform. The control unit 500 may be formed of a microcontroller unit (MCU), and a program for calculating a motor control or a distance measurement may be installed. In addition, the tire tread measuring apparatus 1000 is a tread in the horizontal moving unit 550 for moving the laser sensor in the horizontal direction based on the determined vertical tread surface and the tread surface distance value output from the laser sensor according to the operation of the horizontal moving unit. A tread thickness value may be generated by subtracting the groove distance value, and when the tread thickness value is smaller than a preset tread thickness value, the wear tread portion 530 may further include determining that the tire tread is worn. The display unit 570 may display the measured distance and the determination result to the outside, and the communication unit 560 may transmit the tire tread wear information to the management server or the mobile terminal through the network.

The tire tread measuring apparatus 1000 scans a tire tread surface of a parked vehicle in a vertical direction to determine a tread surface perpendicular to an irradiation path of a distance measuring unit, and a wear level of the tire tread based on the determined vertical tread surface. Wear may also include determining means for determining.

The vertical detection means is to determine the vertical tread surface as an important configuration for increasing the reliability of the wear of the tire tread that is stationary without rotation. 3 is a schematic diagram illustrating an operation of detecting a tire tread surface perpendicular to the distance measuring unit by scanning the distance measuring unit in the circumferential direction of the tire tread according to an exemplary embodiment of the present invention. Referring to FIG. 3, in one embodiment of the distance measuring unit, the laser sensor 300 is disposed on an extension line of the ground on which the tire is placed. For example, if the irradiation path is determined in the a direction or the c direction, the wear of the tire tread is correct. It is difficult to measure and it is difficult to give reliability to these measurement results. This is because the longitudinal grooves (grooves) and the horizontal grooves (grooves), which are patterns formed on the tire treads, are formed in a direction perpendicular to the tire surface, so that the irradiation path irradiated from the laser sensor 300 has the surface of the tire tread. The shape or depth of the most reliable tire tread can be measured when irradiated in a direction perpendicular to the area and the groove area.

To this end, the vertical detection means moves the laser sensor 300 up and down along a longitudinal groove formed in the tire tread surface in order to detect a vertical tread surface whose irradiation path irradiated from the laser sensor 300 is perpendicular to the tire tread surface. Vertical determination unit for determining the tread surface irradiated by the tilting angle having the smallest output value among the output values output from the laser sensor 300 according to the tilting unit 540 and the tilting unit 540 as the vertical tread surface ( 520). 5A and 5B are diagrams illustrating the operation of the tire tread measuring device according to the exemplary embodiment of the present invention, and the tilting unit 540 includes the laser sensor 300 at the motor shaft 211 of the first motor 210. Is connected, and the first motor may rotate the laser sensor 300 to scan the tire tread surface in the vertical direction (for example, sequentially in a, b, and c as shown in FIG. 3) under the control of the controller 500. have. Although the tilting unit 540 has been described as a structure in which the laser sensor is directly connected to the motor, the present invention is not limited thereto, and the laser sensor may be rotated using various mechanical elements such as gears and chains. The vertical judging unit 530 compares the output value output from the laser sensor 300 according to the tire tread surface scan with a, b, c, and converts the tread surface irradiated by the tilting angle having the smallest output value into the vertical tread surface. You can decide. Here, the smallest output value means that the distance between the light source (center) 310 of the laser sensor and the surface of the tire tread is the shortest. The output value may be understood as a distance value. The scan path of the laser sensor may be along a longitudinal groove formed in the tire tread. The longitudinal groove may be a plurality of main grooves having a predetermined width in the circumferential direction of the tire, and the laser sensor scans vertically along the main grove in the vertical direction by distance. By finding the inflection point that becomes smaller and then larger, the vertical tread plane can be precisely detected and determined. Although the scan of the laser sensor is performed along the longitudinal grooves, the present invention is not limited thereto, and the laser sensor may be scanned vertically along a certain area of the tire tread surface.

The wear level determining means includes a horizontal moving part 550 for moving the laser sensor 300 in a horizontal direction with respect to the determined vertical tread surface, and a tread surface distance value output from the laser sensor 300 according to the operation of the horizontal moving part ( The tread groove distance value (y) is subtracted from x) to generate a tread thickness value (D), and when the tread thickness value (D) is smaller than a preset tread thickness value, a wear determination unit that determines that the tire tread is worn 530 may be included.

4 is a schematic view illustrating an operation of measuring tire wear by horizontally moving a distance measuring unit along a set vertical tread surface according to an embodiment of the present invention. Referring to FIG. 4, the horizontal moving unit 550 is a frame ( The screw 120 inserted into the bearing 110 connected to both sides of the 100 has a second pulley 142 connected to one side of the screw, and a first pulley 141 connected by a belt (not shown). The pulley 141 may be connected to the second motor 220 to rotate. Another side of the screw 120 is connected to the horizontal movable block 130 and the horizontal movable block 130 is connected to the connection block for receiving the first motor 210 is controlled by the control unit 500 2 As the motor 220 rotates, the screw 130 rotates so that the laser sensor 300 may move in the horizontal direction. Herein, the laser sensor 300 is operated through a mechanical element such as a motor, a pulley, and a belt screw in the horizontal movement of the laser sensor 300. However, the present invention is not limited thereto and may be implemented using various mechanical elements such as a gear structure such as a rack and a pinion. It can be taken for granted. Referring back to FIG. 4, the laser sensor 300 scanning the pattern formed on the tire tread while horizontally moving along the determined vertical tread plane outputs a tread surface distance value x by measuring a distance to the tread surface. Adjacent tread groove distance values y can be output.

The wear determining unit 530 subtracts the tread surface distance value x from the tread groove distance value y output from the laser sensor to generate a tread thickness value D, and the generated tread thickness value D is previously determined. When smaller than the set tread thickness value, it is determined that the tread is worn and can generate tire tread wear information including the tread thickness value and the wear judgment. The controller 500 may control the display 570 to display the tread wear information and notify the outside. Meanwhile, the wear determining unit 530 compares the tire wear information according to the tread thickness value as well as the distance value or the tread thickness variation measured at both end regions of the determined vertical tread surface, and calculates a difference (deviation). When the tread thickness difference between the both regions is equal to or more than the preset thickness difference (deviation), it may be determined that there is uneven wear. As shown in FIG. 4, the tread surface distance value x and the tread groove distance value y measured through the laser sensor 300 are a laser sensor which is a tire tread surface and a distance measuring device as described above. Since the vertical tread surface of which the irradiation path of 300 is vertical is predetermined through the vertical detection means, a reliable measurement value can be obtained. A reliable measurement here can be understood as being made by irradiating the laser (light) in a direction that is always perpendicular to the tread surface and groove when the laser sensor is moved horizontally along the determined vertical tread plane to measure the distance to the tire tread surface or groove. have.

Meanwhile, the distance measuring unit 510 described the laser sensor 300 as an example, but the distance measuring unit 510 irradiates light onto the surface of the tire tread and uses the information of the reflected light to image the surface of the tire tread. It can be a line scanner that can output. The line scanner can have one line pixel that can scan the tire tread width at one time. When the distance measuring unit is a line scanner, the vertical tread plane is determined using the vertical detection unit described above, and the wear level determining unit acquires image information on the determined vertical tread plane at the moment when it is determined that the vertical tread plane is determined. The tire wear degree according to the tread thickness value may be determined by calculating the surface distance value and the groove distance value of the tire tread by processing pixel information of the acquired image. That is, when the distance measuring unit is a line scanner, it is not necessary to move the line scanner in the horizontal direction of the determined vertical tread surface, and tire tread wear information may be generated by easily and quickly determining tire wear degree by processing an already acquired image.

6 is a diagram illustrating a process of transmitting tire tread wear information to a mobile terminal according to an embodiment of the present invention, and FIG. 7 is a screen displaying tread wear information on a user mobile terminal according to an embodiment of the present invention. Figure is a diagram.

6 and 7, the tire tread measuring apparatus 1000 may transmit tread wear information to the management server or the user portable terminal through the communication unit 560. The communication unit 560 may transmit tread wear information to a user mobile terminal 3 connected to a network through a short-range communication module such as an internet module capable of transmitting tread wear information to a management server through an internet network, such as Wi-Fi and Bluetooth. have. The user portable terminal may be installed with an app that can display the tire tread information, when the tread wear information is received, the linked app is executed to include the basic information 620 and tire tread wear information 630 The tire information display screen 610 may be displayed to inform the user of wear information according to an immediate tire tread measurement.

The present invention has been described in detail with reference to exemplary embodiments, but those skilled in the art to which the present invention pertains can make various modifications without departing from the scope of the present invention. Will understand.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims below and equivalents thereof.

10: tire tread 100: frame
110: bearing 120: screw
130: horizontal movement block 141, 142: pulley
210,220: Motor 211: Motor shaft
300: laser sensor 500: control unit
510: distance measuring unit 520: vertical judgment
530: wear judgment part 540: tilting part
550: horizontal moving unit 560: communication unit
570: display unit 1000: tire tread measuring device

Claims (5)

Vertical detection means for scanning the tread surface of the vehicle is stopped vertically to determine the tread surface perpendicular to the irradiation path of the distance measuring unit;
A wear degree determining means for determining a wear level of the tire tread based on the determined vertical tread surface,
The distance measuring unit is a laser sensor,
The vertical detection means
Tilting unit for rotating the laser sensor 300 connected to the axis of the motor 210 located in the connecting block connected to the horizontal moving block 130 to scan in the vertical direction along the circumference of the tire tread surface;
And a vertical determination unit determining a tread surface irradiated by a tilting angle having the smallest output value among the output values output from the laser sensor as the vertical tread surface according to the operation of the tilting unit.
The wear degree determining means
A horizontal moving block 130 connected to the screw 10 based on the determined vertical tread surface to move the laser sensor in a horizontal direction by the rotation of the screw;
The tread thickness value D is generated by subtracting the tread surface distance value x from the tread groove distance value y output from the laser sensor according to the operation of the horizontal moving unit, and the tread thickness value is a preset tread thickness. A tire tread measuring device comprising a wear judging portion that, when smaller than a value, determines that the tire tread is worn.
delete delete The method of claim 1,
The distance measuring unit is a line scanner,
The vertical detection means
Tilting to move the line scanner up and down along the tire tread surface;
In accordance with the operation of the tilting unit includes a vertical determination unit for determining the tread surface irradiated by the tilting angle having the smallest output value of the output value output from the line scanner as the vertical tread surface,
The wear degree determining means
A tire tread measuring apparatus, characterized in that the wear degree is determined using the shape and depth of the tread by processing the image information acquired through the line scanner for the determined vertical tread surface.
The method of claim 1,
Tire tread measuring device further comprises a communication unit for transmitting the tire tread wear information to a management server or a mobile terminal through a network.

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