WO2022225158A1 - Tire abrasion measuring and tire state diagnosis device - Google Patents

Abstract

The present invention relates to a tire abrasion measuring and tire state diagnosis device. The measuring device has a structure which is installed at a vehicle inspection station, a tire specialty shop, a vehicle repair shop, a gas station, or the like, and allows vehicle wheels to be loaded on the left side and the right side thereof for simultaneous measurement of the left and the right wheel, wherein sensor units (modules) are disposed inside the structure, a connector is located between the left and the right side of the structure, and two reference lines are formed through laser lights, and then analyzed, so that the depth of each tire groove is calculated and abrasion degree thereof is determined.

Description

Tire wear measurement and tire condition diagnosis device

The present invention relates to a tire wear measurement and tire condition diagnosis device, and the tire wear measurement and tire condition diagnosis system configured to conveniently diagnose tire wear and tire condition by installing the device at an automobile inspection station, a tire specialty store, a car center, a gas station, etc. It's about the device.

Tires are essential to automobiles, which are an indispensable means of transportation in modern society. The health condition of tires is an important factor in the safety of automobiles, and the year of production and the state of wear have a direct effect on safety. However, in reality, as shown in FIG. 1 attached as an equipment member, it relies on a sensory test and a test by a gauge or coin.

Currently, there are equipment developed and marketed by several companies such as Germany, the United States, the United Kingdom, and Italy, but the reality is that they are expensive and are inappropriate to use as inaccurate data acquisition related to tire wear due to the problem of the inspection method as shown in FIG. 2 .

The problem with commercially available measuring equipment is that it is a method of dispersing the frictional heat generated during high-speed driving and the load of the vehicle. In particular, the width and diameter of the tire are important factors for distributing the vehicle weight, and there are various types of tires with a diameter of 500 to 750 mm. For this reason, commercially available equipment is measured in the same way as in FIG. 2 , but as predictable through FIG. 2 , inaccurate data is acquired because the tire size and entry position are different each time the image is acquired. In addition, the vehicle width is also up to 1500 ~ 2000mm, so in order to acquire an image at a short distance, it is necessary to mount a number of cameras.

Since the camera must be erected at a certain angle, the height of the equipment must also be increased. The second problem with the developed equipment is that only one LINE LASER, which is the light emitting part, is used, so if stones or foreign substances are stuck in the tire or if there is a shadow due to the tread of the tire depending on the irradiation angle of the light emitting part, it is possible to obtain an inaccurate tread image. A data error occurs.

The third problem with the developed equipment is that the wear pattern of tires varies according to the driver's habits and vehicle condition.

On the other hand, the method of measuring the tire tread by attaching it to the automobile inspection system of Registration Patent Publication No. 10-1325089 applied and registered in Korea is that the vehicle vibrates up, down, left, and right due to the roller structure of the vehicle inspection station when the tire wheels are driven. The laser emitter/receiver unit installed in conjunction with each other also obtains data with errors when acquiring tread data due to shaking, so its use cannot be guaranteed.

In addition, it is a device that measures the laser sensor unit while moving it left and right by driving a motor, and it takes time to move from the left wheel to the right wheel. There is a hassle of measuring the rear wheel by moving after measuring the front wheel. At this time, there is a problem in that the measurement time is prolonged because the rear wheel must be measured by re-installing the laser sensor unit after measuring the front wheel. In addition, the above method has a structure in which the power generated by the motor is transmitted to the laser sensor unit having a pulley structure through the belt. There is a problem that an error that cannot be controlled by position occurs.

On the other hand, as a result of the Korea Consumer Agency's survey on vehicle drivers, 64.6% of vehicles with insufficient air pressure and 32.8% of vehicles with defective tires showed that drivers' perception of the risk of accidents caused by tires was generally high. It is necessary to raise the driver's awareness of the risk factors caused by tires, as drivers who are aware of insufficient tire inspection, replacement timing, and proper air pressure have lower rates of installing defective tires and insufficient air pressure than drivers who do not. .

However, since objective data cannot be obtained due to the absence of tire wear measuring equipment, the existing sensory tests or inaccurate data are not convincing. In addition, since the main material of tires is rubber, old tires are easily hardened and easily damaged, which can cause accidents. Therefore, it is necessary to check the year of tire production and in what week it was produced.

SUMMARY OF THE INVENTION The present invention is intended to improve the conventional problems described above.

First, it is an object of the present invention to provide a tire wear measurement and tire condition diagnosis apparatus capable of acquiring reliable tire wear data by measuring at a fixed position the measurement position of the tire, which was different each time depending on the width or size of the tire.

Second, it is intended to provide a tire wear measurement and tire condition diagnosis device that enables reliable data acquisition even when stones or foreign substances are embedded in the tire and even when shadows are generated by the tread depending on the irradiation angle of the laser light emitting part.

Thirdly, different types of tire wear appear due to the driver's habits (eg cornering), the degree of air pressure (eg, under or over), and wheel alignment. An object of the present invention is to provide a tire wear measurement and tire condition diagnosis device that can be realistically implemented through data acquisition.

As a technical solution method of the present invention, a measuring device capable of diagnosing wear and condition of automobile tires is provided at automobile inspection centers, tire specialty stores, car centers, gas stations, and the like.

The measuring device has a structure on which a vehicle wheel is mounted on the left and right sides so as to simultaneously measure the left and right wheels, a sensor unit is mounted inside the structure, respectively, and a connector is positioned between the left and right structures.

In the measuring device, when the front wheel of the vehicle enters the measuring device, several switches detect the position of the tire, and operate two lasers at the corresponding positions among the several lasers in conjunction with the detected switches, and whether the tire width is narrow or wide. The laser light is irradiated toward a predetermined point to be measured on both front tires so that it can be measured, and two reference lines are respectively formed.

The measuring device reads the two reference line images formed on both front wheel tires into the camera through a prism or mirror and transmits them to the computing device in a wired/wireless communication method through a transceiver connected to the connector, and the two By analyzing the tire image with irregularities in the portion where the reference line is formed, the depth is calculated for each tire trough to determine the degree of wear. At this time, it is determined whether there are stones or foreign substances by comparing and evaluating the calculated values of the two reference line parts, and the value of the part with stones or foreign substances is excluded and the value of the part without stones is adopted. After measuring the front wheel, the rear wheel is measured in the same way as the vehicle moves forward. This series of processes is measured while the car passes through the measuring device without stopping. The calculated data and the notification information organized based on the data are sent to the measurement practitioner and customer monitor through wired/wireless communication to share the measurement contents at the same time.

In one embodiment, by installing n switches (sensing sensors) on the side where the vehicle enters integrally with the tire measuring device, the position of the left/right wheels of the vehicle entering can be detected with high accuracy.

In one embodiment, the measuring device connects a drive shaft composed of a screw thread to a linear stepping motor, and a sensor unit for measurement including two lasers, a prism, and a camera is mounted on the drive shaft, and on the other side of the sensor unit The surface is configured in the form of a pupil to fit a smooth guide shaft. Precise control of moving left/right along the drive shaft so that the sensor unit for measurement is located in the center of the lower part of the car wheel before tire tread measurement by driving the motor based on the result of detecting the position of the car wheel by n switches (sensing sensor) is possible can be configurable.

In one embodiment, the sensor unit for measurement may be configured to be mounted on the measurement device so as to face the bottom surface of the tire in order to measure tire wear and diagnose the condition without a prism (mirror).

In one embodiment, the measuring device has a transparent structure in which a part of the cover on which the wheels of the car rides is transparent, wet sand accumulated on the transparent cover can be wiped off with a rag, and dry dust can be easily blown out with compressed air can be designed

In one embodiment, the measuring device mounts a roller on the top of the measuring device, stops the entered car wheel, and then drives a roller designed not to vibrate at low speed with the measuring device power to rotate the car wheel at a low speed. It can be configured so that abnormal wear data of the tire can be acquired by acquiring the value of the measurement point of , and taking the value and the average value of different parts.

In one embodiment, the measuring device irradiates laser light to a certain point of the tire to form two reference lines (line lasers), captures and reads the formed image with a camera, and records the tread data acquired in this way. It is transmitted to the arithmetic unit in a wired/wireless communication method through the transceiver connected to the connector. Notification information and tire surface images, which are organized based on the degree of wear and calculated values through calculation in the calculation device, are simultaneously sent to the monitor for measurement practitioners and customer (driver) using wired/wireless communication method. Here, multiple monitors can be configured.

In one embodiment, the measurement device organizes the configuration displayed on the monitor based on the plurality of trough depth values and calculation values of four (front, rear, left, right) tires calculated by the calculation device. And when tire data is acquired, it can be divided into acquired images and configured and displayed.

In one embodiment, the measuring device is equipped with a roller on top of the measuring device. By installing two cameras on the inner wall of both structures between the two rollers, the entered car wheels are stopped, and then the rollers designed so that there is no vibration during low-speed rotation with the power of the measuring device are driven to measure tire wear while rotating the car wheels at low speed. It can be configured to diagnose the condition and at the same time acquire an image of the side wall of the tire to read the tire production year.

In one embodiment, the sensor unit is equipped with two cameras per one wheel, divides half the tire width into left and right sides to acquire two reference line data, and then synthesizes the left and right data to synthesize the entire tire. According to the configuration to acquire the width data, the camera can be mounted by lowering the height, so the height of the measuring device can be lowered.

In one embodiment, it is necessary to maintain an appropriate distance between the tire and the laser to prevent shading caused by laser light, and accordingly, the laser light is configured to be irradiated to the tire through a prism or mirror in order to reduce the size of the increased sensor unit. can do.

In one embodiment, a heating wire (eg, a heater) is mounted on the lower part of the sensor unit to prevent frost on the prism or mirror due to strong cold, or the camera shutter does not work, maintaining the temperature without hindrance to operation. can be configured to be

In one embodiment, a moving screw hole is formed on both sides of the sensor unit to move the sensor unit left/right, and a drive shaft having a screw thread matching the moving screw hole is installed in both moving screw holes. One shaft of both drive shafts is rotatable and spans the groove on the inner wall of the sensor unit, and the other shaft is composed of a cylindrical toothed wheel and meshed with the cylindrical toothed wheel mounted on the linear stepping motor so that it can rotate. It can be configured so that both drive shaft cogs are interlocked on the cylindrical gear mounted on the sprocket so that the sensor unit can be moved left/right along both drive shafts by motor rotation so that it can be located in the center of the tire.

In one embodiment, when the vehicle wheel enters the structure in the measuring device, it is measured separately from the switch in the measuring device to enable high-accuracy tire wear measurement even though the time it takes to enter varies according to the driving habits of drivers. It can be configured to position a switch (sensor) for detecting wheel entry near the point. Therefore, the switch in the measuring device detects that the tire is biased to the left/right when entering, and is used to select two of the lasers. ,2 and it can be set so that it can be used for the purpose of notifying the camera operation time.

In the present invention, it should be construed that the scope of use and application of data obtained by the above measurement method is not limited to the above-mentioned, but can be applied to all fields that can be made by applying the method of the present invention.

The tire wear measurement and tire condition diagnosis apparatus according to the present invention can expect the following effects.

First, it is possible to measure by excluding stones or foreign substances embedded in the tire, and it is possible to measure a certain point regardless of the size of the tire or the width of the tire, and the tread shadow can be changed by the laser position irradiated to form a reference line. It is possible to measure by excluding the occurrence of tire wear and obtain reliable tire wear data.

Second, it is possible to lower the height of the measuring device due to the size of the camera and lens by applying a prism (mirror).

Third, it is possible to photograph the tire surface using a camera for diagnosing tire wear and conditions even without a separate camera for acquiring an image of the tire surface.

Fourth, as the vehicle moves forward, it is possible to measure tire wear on all four wheels and take a surface image within a short time.

Fifth, it is possible to determine the shape and location of tire wear caused by the driver's habit, the degree of air pressure (under or over), and wheel alignment by calculating the two reference line images.

Sixth, it is possible to acquire multiple measurement point data while rotating the wheel of the vehicle by the roller, so that tire wear can be precisely measured.

Accordingly, the present invention enables reliable and objective tire wear data acquisition, tire surface image acquisition, and diagnosing of tire wear locations and wear patterns without relying on the subjective judgment of the inspector, so that a change in the perception of the driver of the tire is expected, Prevents car accidents caused by tires.

1 is a view showing a method of inspecting a tire using a conventional gauge.

Fig. 2 is a diagram showing an outline of a conventional inspection system;

3 shows a measurement overview of the system of the present invention;

4 is a view showing the appearance of the tire wear measuring device of the present invention.

5 is a schematic diagram for moving a sensor unit (module) left/right by driving a linear stepping motor according to an embodiment of the present invention;

Fig. 6 is a block diagram showing a hardware configuration of the present invention;

7 is a block diagram showing a hardware configuration according to an embodiment of the present invention (applying a linear stepping motor).

8 is a view showing a state in which reference lines are formed on the surface of a tire.

9 is a view displayed on a monitor showing the tire wear measurement result of the present invention as an example.

10 is a schematic diagram for moving a sensor unit (module) left/right by driving a linear stepping motor in a structure that can measure from the lower part of the tire without a prism (mirror).

11 is a schematic view showing tire wear measurement and condition diagnosis while driving the roller with the power of the measuring device.

12 is a schematic diagram in which tire wear measurement and condition diagnosis and tire production year measurement are possible while driving the roller with the power of the measuring device.

13 is a schematic view of a heater for maintaining an appropriate temperature by using a prism (mirror) when irradiating a laser to reduce the size of the sensor unit, and for smooth operation of the sensor unit even in severe cold weather.

An apparatus for measuring tire wear and diagnosing a tire condition according to an embodiment of the present invention will be described. Hereinafter, descriptions of commonly known techniques that can be easily understood through the configuration and description of the present invention will be omitted by those skilled in the related art. do.

Hereinafter, the configuration and function of the tire wear measurement and tire condition diagnosis apparatus will be described with reference to FIGS. 3 to 13 attached thereto.

Structure as shown in Fig. 4 with a built-in sensor unit (module) with a measurement outline as shown in Fig. 3 to easily install and use the tire wear measurement and tire condition diagnosis device at automobile inspection stations, tire specialty stores, car centers, gas stations, etc. A measuring device consisting of

A plurality of lasers 70, a camera 40, and a plurality of switches (SW) are respectively mounted inside the structure on which the left/right car wheels are mounted, and the connector 50 is positioned in the middle part, and the connector ( 50), the laser 70, the camera 40, and the switch 80 are connected, and the arithmetic unit 30 is configured to send and receive data in a wired/wireless communication method through the transceiver 60 connected to the connector 50. It is arranged so that data transmission is possible from the arithmetic unit 30 to the monitors 10 and 20 .

A part of the top cover of the measuring device is designed to have a transparent structure, and the transparent structure is placed slightly lower than the surrounding structure so that the measuring part of the vehicle wheel is not pressed by the vehicle load.

When a car enters the structure of this measuring device, several switches (SW) detect the tire position, and at the same time, the two lasers (Laser 1 and Laser 2 in Fig. 3) are selected according to the position of the wheel. it will work The light emitted from two lasers installed toward a certain position to measure tire wear is directed toward the tire in the form of a line laser. When the line laser light is irradiated on a portion of the tire having the unevenness, two reference lines having the uneven shape are formed as shown in FIG. 8 . At this time, the camera 40 takes a picture of the tire surface together with the main image formed on the tire width, and transmits it to the calculating device 30 in a wired/wireless communication method through the transceiver 60 connected to the connector 50 . By reading the concave-convex part of the image received from the calculating device 30, the presence of stones or foreign substances among the two reference lines is read, the value of the part with foreign substances (stones) is excluded, and the depth of several valleys is calculated with the remaining values. Assess the degree of wear. The calculated value is simultaneously transmitted to the monitor 10 for the measurer and the monitor 20 for the customer (driver) in a wired/wireless communication method together with the notification information and the tire surface image determined based on the calculated value (refer to FIG. 9) do. In the above measurement process, sensor units (switch, laser, camera) (refer to FIG. 5) are respectively installed on the left and right sides so that the left and right front wheels of the vehicle can be measured simultaneously. The measurement proceeds immediately.

In this way, the image captured by the camera 40 is directly transmitted to the computing device 30 through a wired/wireless communication method through the transceiver 60 connected to the connector 50, and the tire wear value performed by the calculation function. is directly transmitted to the monitors 10 and 20 for the measurement practitioner and the customer (driver), and a series of processes is performed in real time, so that the measurement and the client (driver) share the result at the same time. In the above, the notification information can be classified as suitable for use, regular inspection, replacement, etc., but it is possible to mark the steps more subdivided and can be notified through a monitor. The transmission/reception method described above is a method already applied in various fields, and data transmission is possible in various methods such as Bluetooth, Wi-Fi, RS232C, and network.

On the other hand, depending on the shape and location of the tire wear, insufficient air pressure when both sides are worn, excessive air pressure when the center portion of the tire is worn, and the driver's abrupt cornering and irregular wear of tires are caused by wheel alignment when both outer sides are worn. It can be easily distinguished by calculation through image analysis of two reference lines.

Therefore, in the notification information function, the wear information is provided to the monitor in a wired/wireless communication method by classifying the causes such as under-air pressure, over-air pressure, cornering, and alignment based on the result of analysis of the wear shape in the calculating device 30 .

In one embodiment, as shown in FIG. 12, n switches (sensors) for detecting the position of a vehicle wheel entering the front in one piece with the measuring device are installed on both sides (left / right), respectively, and the vehicle wheel is mounted A sensor unit as shown in FIG. 5 is mounted inside the structures on both sides of the measuring device.

In FIG. 5, the sensor unit is configured such that a drive shaft composed of a screw thread is connected to the linear motor for driving, the sensor unit is mounted on the drive shaft, and a smooth guide shaft is mounted on the other side of the sensor unit.

The sensor unit consists of two lasers, a prism (mirror), and a camera including a lens.

In the above embodiment, when entering the wheel of a car, the tire position is sensed by n switches installed in two places (left/right), and wired/wireless communication is performed through the transceiver 60 connected to the connector 50. It is transmitted to the arithmetic unit 30 .

By analyzing the result received from the arithmetic unit 30, it is determined based on which switch has been operated, the linear stepping motor 90 is operated, and the sensor unit mounted on the drive shaft connected to the linear stepping motor 90 is It moves left/right along the screw line formed on the drive shaft so as to be located at the center of the lower part of the wheel of the vehicle in contact with the cover of the measuring device.

After the sensor unit is positioned in the center, the two lasers installed on both sensor units start irradiating the tire, and at the same time, the camera operates and shoots images of two reference lines formed on both tires. ) and transmitted to the computing device 30 in a wired/wireless communication method through the connected transmission/reception device 60 .

The computing device 30 calculates the received image and transmits notification information including the degree of tire wear, the shape and location of wear, and the tire image to the multiple monitors 10 and 20 through wired/wireless communication.

Accordingly, it is possible to share data in real time between the monitor 10 for the measurer and the monitor 20 for the client (driver) at the same time as the measurement. In addition, as the front wheel measurement is finished, the vehicle moves forward, so that the rear wheel measurement is performed by repeating the same process as the front wheel, and the acquired data and notification information can be transmitted to the monitor and shared in real time.

Claims (12)

It is a measuring device that can measure the wear of automobile tires and diagnose tire conditions by being provided to any one of automobile inspection stations, tire specialty stores, car centers, and gas stations, The measuring device has a structure on which a car wheel can be mounted on the left and right sides so as to simultaneously measure the left and right wheels, a sensor unit is mounted inside the structure, and a connector is located between the left and right structures, The sensor unit of the measuring device operates several switches that detect the tire position when entering the vehicle wheel and operates two lasers at the corresponding positions among several lasers in conjunction with the detected switches to measure both narrow and wide tires Several lasers are irradiated to a predetermined point to be measured on both tires to form two reference lines, respectively, and two reference line images formed on both tires and a tire surface image are transmitted through a prism or mirror. It consists of a reading camera, The transceiver connected to the connector is configured to transmit the information read by the camera to the arithmetic unit through wired/wireless communication method, and analyzes the tire image with irregularities in the portion where the two reference lines are formed to determine the depth for each tire trough. The function to determine the degree of wear by calculation and whether there are stones or foreign substances is determined by comparing and evaluating the calculated values of the two reference line parts. The function to perform the role played, the function to determine the shape and location of tire wear by comparing the values of the two reference lines, the notification information organized based on the calculated data and the data, and the tire surface image to the monitor for measurement workers and customers A tire wear measurement and tire condition diagnosis device including an arithmetic unit and a monitor with a function of transmitting via wireless communication. The method according to claim 1, The notification information is notified through an external monitor for measurement practitioners and drivers along with data on wear, and the configuration for wear can be divided into suitable for use, regular inspection, and replacement, but it is possible to further subdivide the steps and indicate, Tire wear measurement and tire condition diagnosis device, characterized in that the indication of the wear shape can be classified into under-air pressure, over-air pressure, cornering, and alignment based on the condition diagnosis result, but also provides an image of the tire surface. It is a measuring device that can measure the wear of automobile tires and diagnose tire conditions by being provided to any one of automobile inspection stations, tire specialty stores, car centers, and gas stations, The measuring device has a structure on which a car wheel can be mounted on the left and right sides to simultaneously measure the left and right wheels, and a sensor unit without a prism or mirror is mounted inside the structure to face the tire floor, It is configured so that the connector is located between the left and right structures, The sensor unit of the measuring device operates several switches that detect the tire position when the vehicle wheel enters, and operates two lasers at the corresponding positions among several lasers in conjunction with the detected switches to measure both narrow and wide tires. It consists of several lasers to form two reference lines by irradiating laser light toward a specific point to be measured on both tires, and a camera that reads the images of the two reference lines and the tire surface formed on both tires respectively. becomes, The transceiver connected to the connector is configured to transmit the information read by the camera to the arithmetic unit through wired/wireless communication method, and analyzes the tire image with irregularities in the portion where the two reference lines are formed to determine the depth for each tire trough. The function to determine the degree of wear by calculation and whether there are stones or foreign substances is determined by comparing and evaluating the calculated values of the two reference line parts. The function to perform the role played, the function to determine the shape and location of tire wear by comparing the values of the two reference lines, the notification information organized based on the calculated data and the data, and the tire surface image to the monitor for measurement workers and customers A tire wear measurement and tire condition diagnosis device composed of an arithmetic unit and monitor with a function of transmitting through wireless communication. 4. The method of claim 3, The measuring device is configured to acquire tire wear data and tire surface image while mounting a roller on the upper part of the measuring device, stopping the entered car wheel, and then driving the roller with the power of the measuring device to rotate the car wheel at low speed Tire wear measurement and tire condition diagnosis device. 5. The method according to claim 4, Tire wear measurement and tire condition, characterized in that the measuring device is configured to read the tire production year and tire damage state by mounting two cameras on the inner wall of both structures between the two rollers to obtain an image of the side wall of the tire diagnostic device. It is a measuring device that can measure the wear of automobile tires and diagnose tire conditions by being provided to any one of automobile inspection stations, tire specialty stores, car centers, and gas stations, The measuring device has a structure on which a car wheel can be mounted on the left and right sides so as to simultaneously measure the left and right wheels, a sensor unit is mounted inside the structure, and a connector is positioned between the left and right structures, The sensor unit in the measuring device connects a screw threaded drive shaft to the linear stepping motor, the sensor unit is mounted on the drive shaft, and the other side of the sensor unit has a pupil shape to fit into the guide shaft. The sensor unit drives the linear stepping motor based on the result of detecting the position of the vehicle wheel by n switches (sensing sensors) to the left along the drive shaft so that the sensor unit for measurement is located at the center of the lower end of the vehicle wheel before tire tread measurement / Consists of two lasers that irradiate each other to form two reference lines after precise control moving to the right, and a camera that reads images of two reference lines formed on both tires and the tire surface image through a prism or mirror becomes, The transceiver connected to the connector is configured to transmit the information read by the camera to the arithmetic unit through a wired/wireless communication method. The function to determine the degree of wear by calculating the depth of each tire trough by analyzing the image of a tire with irregularities in the portion where the two reference lines are formed, and the function to compare and evaluate the calculated value of the two reference line portions to determine whether there are stones or foreign substances. The function of determining the shape and location of tire wear by comparing the values of two reference lines, excluding the value of the part with stones or foreign substances, and taking the value of the part without stones and data and data A tire wear measurement and tire condition diagnosis device composed of an arithmetic unit and monitor with built-in function to transmit notification information organized based on this and the tire surface image to the monitor for measurement workers and customers through wired/wireless communication. 7. The method of claim 6, The sensor unit is a tire wear measurement and tire condition diagnosis device that has a structure without a prism or a mirror and is mounted toward the bottom of the tire to perform a measurement function. 7. The method of claim 6, The sensor unit is configured to mount two cameras per wheel, divide half the width of the tire into left and right, and acquire two reference line data, and then synthesize the left and right data to acquire data of the entire tire width. Tire wear measurement and tire condition diagnosis device, characterized in that. 7. The method of claim 6, A device for measuring tire wear and diagnosing tire condition, characterized in that the sensor unit is configured so that the light irradiated from the laser is irradiated to the tire through a prism or mirror, and a camera without a prism or mirror is directed to the bottom of the tire. 7. The method of claim 6, A tire wear measurement and tire condition diagnosis device, characterized in that by mounting a heating wire on the lower part of the sensor unit, the sensor unit operates smoothly even in severe cold weather. 7. The method of claim 6, The measuring device is equipped with a roller on the upper part of the measuring device, and two cameras are mounted on the inner walls of both structures between the two rollers to stop the entered car wheel, and then drive the roller with the power of the measuring device to rotate the car wheel at low speed. Tire wear measurement and tire condition diagnosis apparatus, characterized in that the tire wear data and tire surface image are acquired, and the tire production year and tire damage state are read by acquiring sidewall images of the tire at the same time. 4. The method according to claim 1 or 3, The switch mentioned in the above measurement device detects the tire leaning to the left/right when entering, and is used to select two of the lasers. Separately from the above switch, a switch (sensor) is installed near the measurement point A tire wear measurement and tire condition diagnosis device, characterized in that it is used for the purpose of notifying the laser 1 and 2 and the camera operation time by detecting that the tire has entered the point.

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