KR20030061496A - Non-contact TreadWear Measurement System Using Rflecting Plate - Google Patents

Abstract

PURPOSE: A portable tread wear measuring apparatus is provided to achieve reproducibility of data and to improve measuring reliability by measuring a total profile of a tire tread and depth of the tire tread. CONSTITUTION: A portable tread wear measuring apparatus includes a laser sensor(D) capable of measuring a profile and depth of a tire tread. A reflection plate(E) is positioned in a predetermined position apart from the laser sensor(D) by predetermined distance. A guide bar(F) is provided with a servo motor for moving the laser sensor(D) right and left on a tire tread surface. A fixing section(B) is positioned at the center of a tire rim. The fixing section(B) has a servo motor for controlling the laser sensor(D) and the reflection plate(E) in such a manner that the laser sensor(D) and the reflection plate(E) are rotated along the tire tread surface. A controller(A) is connected to the laser sensor(D) and the guide bar(F).

Description

Non-contact TreadWear Measurement System Using Rflecting Plate}

The present invention relates to a portable treadware measuring apparatus using a reflector for measuring a tread profile and wear depth of a vehicle tire, and a treadware capable of accurately and efficiently measuring a wear depth of a tread surface using a laser sensor and a reflector. It relates to a measuring device.

In the prior art, the tire treadware depth is measured by dividing the tire into eight circumferences, and each measuring point (Main Groove & Lateral Groove) is measured through the analog depth gauge (depth guage). Contact and record the measurement. The tire life is measured by applying the tire wear degree measured from the initial depth and the depth measured after the run from the data obtained here.

However, by measuring the depth gauge, which is a measuring device, in direct contact with the tire tread surface, there were many difficulties in accurate measurement when the tread surface was irregular due to partial wear or the like.

In addition, since most of the measurements are performed manually, the flow of the measurement data due to the condition of the operator, the weather, and the external temperature is large, and the deviation from the measured values is large, which makes it difficult to secure reproducibility of the measurement. Even when the test result was calculated, there was a lot of difficulty in calculating the accurate calculation value.

In addition, the conventional measuring method using a gauge takes a long time to measure, and there is a lot of difficulty in securing the space for installing the measuring device and the measurement of the inner tire in the case of tires for large vehicles.

In addition, the conventional portable non-contact treadware measuring device is not easy to measure and the measurement range is limited because the measuring space is narrow to use the measuring device in the tire mounting space when the tire is mounted on the vehicle. There was a difficulty in the acquisition of measurement data.

Therefore, the present invention can measure the profile and depth of the entire tread surface of the tire to determine the depth of treadware, which is an important item of tire performance, using a laser sensor and a reflector as a non-contact measuring device for solving the above problems. In other words, the standardization and accuracy of measurement methods, which are essential for reproducibility, reliability, and measurement equipment of data, are provided.

In addition, the present invention is to provide a measuring device that can be measured in the state of mounting the tire tread wear degree on the road immediately without detachment of the tire because it can be used in a narrow space because it is easy to carry with a small weight. .

1 is a system configuration diagram of a portable treadware measuring apparatus using a reflector as shown.

Figure 2 is a block diagram showing a first embodiment of a portable treadware measuring apparatus using a reflector as shown.

Figure 3 is a block diagram showing a second embodiment of a portable treadware measuring apparatus using a reflector as shown.

[Short description of symbols]

A controller

B fixed government

C fixing member

D laser sensor

E reflection board

F guide bar

Portable treadware measuring apparatus using a reflecting plate according to the present invention for achieving the above object is to improve the measuring unit of the conventional non-contact treadware measuring apparatus measuring a laser sensor and a reflecting plate that can reflect the measuring laser and the reflecting plate In order to improve the results and calculation accuracy of wear, which is one of the important performances of tires, and to secure reproducibility and reliability, it is constructed as follows.

A laser sensor capable of measuring the profile and depth of the tire tread;

A reflection plate positioned at a predetermined distance from the laser sensor;

A guide bar having a position control servomotor for horizontally moving the laser sensor from side to side on the tire tread surface;

A servo motor positioned at the center of a tire rim and controlling the laser sensor and the reflector to rotate at constant speed along the tire tread surface on the tire circumference, and for mounting and fixing the measuring device to the center of the tire rim. A fixed part;

A controller connected to the laser sensor and the guide bar to control the constant speed rotation of the position control servomotor and the servo motor of the rotating unit, and to process, store, and display data measured by the profile and depth of the tire tread in the laser sensor. It is characterized by that.

In addition, the angle of the reflector is maintained at 45 °, the angle between the reflector and the laser sensor is a portable treadware measuring device using a reflector, characterized in that it can be arbitrarily adjusted between 5 ~ 30 °.

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.

1 is a system configuration diagram of a portable treadware measuring apparatus using a reflector as shown.

As shown, a laser sensor D and a reflector E are used to measure a tire tread profile image in a non-contact manner. The laser sensor (D) is controlled by a servomotor and is attached to the guide bar (F) to move horizontally on the tire tread surface and scans the information (tread profile and depth) of the tire tread at a specified angle.

The fixing part (B) including a servo motor for controlling the guide bar (F) and the reflecting plate (E) to which the laser sensor (D) is attached at a desired position and controlling the constant speed rotation on the circumference of the tire is The fixing member C fixes the guide bar F and the reflecting plate D to which the laser sensor D is attached at the center of the tire rim so that the laser sensor D can be stably and continuously measured.

The laser sensor D is configured to be connected to a controller A which processes, stores and displays the information acquired on the tire tread surface as data.

(Example 1)

Figure 2 is a block diagram showing a first embodiment of a portable treadware measuring apparatus using a reflector as shown.

Initially, the measurement device is mounted on the tire rim so that it can rotate at a constant speed in the front and rear directions, and the measurement preparation is made. For the measurement of tire treadware from the controller A, the position and measurement control are developed. When the prepared program is started and ready, the tread profile image of the initial tire is scanned for measurement of each position (S10). At this time, the guide bar (F) is attached to the laser sensor (D) for the measurement is installed so as to be 90 ° to the tire rotation direction as shown in FIG.

At this time, the laser sensor (D) and the reflecting plate (E) maintain a constant distance and rotate at constant speed by the servo motor included in the fixed portion, the laser sensor (D) at the position facing the reflecting plate (E). Scan at intervals of 0.5mm from left to right in the horizontal direction on the tire tread surface, and the angle of the reflector is maintained at 45 ° based on the angle maintained by the guide bar F to which the laser sensor D is attached. (The angle of the reflector and laser sensor can be adjusted from 5 to 30 °.) The laser sensor (D) moves along the guide bar (F) from left to right on the tread surface of the tire. After moving to the next position and scanning in the state of saving the scanned image for the setting section (S10).

Next, the tread profile image of the initial tire scanned as described above is stored in the storage unit of the controller A (S20).

Next, in order to scan the tread profile image of the tire that has completed the driving test, the tread profile image of the tire having completed the driving test is scanned by the method (S10) described above (S30).

Next, as described above, the tread profile image of the finished tire is stored in the storage unit of the controller A (S40).

Next, the tread profile image (S20) of the initial tire and the tread profile image (S40) of the tire subjected to the driving test are compared for each position by starting the program embedded in the controller (A).

Next, the density of the image compared in the above method is calculated by the program embedded in the controller A (S60).

Next, the above content is displayed on the controller A (S70).

Unlike the method used to calculate the density of the applied paint to measure the irregular wear of the tire, this is a measurement by scanning the tread profile image of the entire tire to measure the profile of the tread appearance. I can express it.

(Example 2)

Figure 3 is a block diagram showing a second embodiment of a portable treadware measuring apparatus using a reflector as shown.

This embodiment is a wear test method for determining the life of a tire. First, when a tire is mounted on a vehicle under actual user conditions and the tire is mounted with an anti-skid depth (ASD) at the initial stage of mounting to evaluate the life of the tire. Km is recorded as performed in Example 1 (S100).

Next, after running under the above conditions, the tire's RTD (Remaining Tread Depth) and the running Km at that time are recorded as in Example 1 (S200).

Next, the initial recorded value S100 is compared with the recorded value S200 after traveling (S300).

Next, the value compared above is applied to a mileage (Mileage) prediction equation (S400).

Next, it is possible to evaluate how long the life of the tire is to calculate the estimated running distance (S500).

As described above, the entire length of the tread 360 ° can be expressed so that the life of the tire can be evaluated.

As described above, the present invention uses a non-contact measuring method using a laser sensor and a reflecting plate as a portable treadware measuring device using a reflecting plate, thereby minimizing deviation of measurement data compared to a contact measuring method. It is possible to secure the reproducibility of the data because the external conditions can be eliminated because the measurement conditions are fixed, and the tread profile of the tire can be measured automatically, thus reducing the time required by the automatic measurement and the measurement according to the automatic measurement. The advantages of continuous processing of data and the efficiency of management due to transmission and storage can be obtained. Consequently, irregular treadware of tires can be measured, thus ensuring the reliability of judgment results on treadware depth.

In addition, compared to the conventional portable measuring device, it is easy to carry at a small weight and can be directly measured in a state in which a tire is mounted on a vehicle, so there is an advantage that it is not limited to a narrow space or place.

Claims (2)

In the portable treadware measuring device using a reflector, A laser sensor capable of measuring the profile and depth of the tire tread; A reflection plate positioned at a predetermined distance from the laser sensor; A guide bar having a position control servomotor for horizontally moving the laser sensor from side to side on the tire tread surface; A servo motor positioned at the center of the tire rim and controlling the laser sensor and the reflector to rotate at constant speed along the tire tread surface on the tire circumference, and for mounting and fixing the measuring device at the center of the tire rim. With the government; A controller connected to the laser sensor and the guide bar to control constant speed rotation of the position control servomotor and the servo motor of the rotating unit, and to process, store, and display data measured by the profile and depth of the tire tread in the laser sensor; Portable treadware measuring device using a reflector, characterized in that consisting of. The method of claim 1, The angle of the reflecting plate is maintained at 45 °, the angle between the reflecting plate and the laser sensor can be adjusted arbitrarily between 5 ~ 30 ° Portable treadware measuring apparatus using a reflecting plate, characterized in that.