KR101091943B1 - A Measuring Apparatus of Tire Profile - Google Patents
A Measuring Apparatus of Tire Profile Download PDFInfo
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- KR101091943B1 KR101091943B1 KR1020100000169A KR20100000169A KR101091943B1 KR 101091943 B1 KR101091943 B1 KR 101091943B1 KR 1020100000169 A KR1020100000169 A KR 1020100000169A KR 20100000169 A KR20100000169 A KR 20100000169A KR 101091943 B1 KR101091943 B1 KR 101091943B1
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- laser
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Abstract
The present invention provides a tire-shaped frame, installs a plurality of sensor modules consisting of a laser beam and a camera on the frame, and is equipped with a servo motor for moving it to obtain a profile of the tire surface while rotating the tire to quickly tire To provide a tire profile measuring device that can measure whether the defect of the purpose and effect.
The present invention is to provide a profile of the tire surface to quickly determine whether the tire is defective, install a frame of the shape of a cylinder, and a plurality of lasers and cameras on the frame to install a laser beam on the surface of the tire And irradiates the shape of the surface irradiated with the laser beam with a camera, and the laser and the camera are composed of one set and driven by a servo motor, and the servo motor is driven between the surface of the tire and the laser and the camera. Displacement measuring sensor is installed to maintain the interval of the constant, and the servo motor for rotating the measurement target tire is installed, and the tire surface is rotated to obtain the profile of the tire surface quickly to determine whether the tire is defective To provide a tire profile measuring device that can measure the It works.
Description
The present invention is to provide a profile of the tire surface to quickly determine whether the tire is defective, install a frame of the shape of a cylinder, and a plurality of lasers and cameras on the frame to install a laser beam on the surface of the tire Irradiates, and detects the shape of the tire surface irradiated with a laser beam with a camera, the laser and the camera is composed of one set is driven by a servo motor to move in response to the change of the tire specification, by the servo motor It relates to a tire profile measuring device is provided with a displacement measuring sensor for automatically detecting the surface of the tire and to maintain a constant distance between the laser and the camera, the servo motor for rotating the tire to be measured.
Profile measuring device is a kind of 3D measuring device which is essential for reverse engineering and various devices have been developed and commercialized all over the world. Conventional measurement methods are divided into a method using a contact displacement sensor and a method using a laser, the method using a contact displacement sensor is rough surface, in the case of a surface consisting of fine grooves can not express the shape as it is, measurement resolution This equipment is not suitable for production line inspection equipment as it takes about 30 minutes to measure and analyze.
In addition, the resolution using a laser is determined according to the thickness of the laser, and the measurement method is a method of moving and measuring by using a laser point. Although the measurement time is similar to that of a contact type, it is a method of receiving and processing digital data. As a result, data processing time is short. However, this also makes it unsuitable to measure on a production line, given the time required.
Recently, a measurement method using a vision system, a vision system, was developed and commercialized in the United States, but its resolution is low and the structure is not suitable for application to a production line to obtain a profile of a tire.
There is another type of vision system, but it takes a lot of time and money to measure the profile of the tire as the sensor moves around the object to measure the surface of the object for measurement. Not suitable for application in production line.
The problem to be solved by the present invention is to install the four sensor modules in the "c" shaped frame to quickly and accurately the tire profile with a single rotation of the outer profile of the entire surface irrespective of the change in the width and diameter of the tire To measure.
Another problem to be solved by the present invention is to be able to determine whether the failure by quickly obtaining the profile of the tire in the field without undergoing a pre-treatment process before measuring the profile of the tire.
Another problem to be solved by the present invention is that the angle of the laser beam irradiated to the surface wide in the width direction of the tire and the angle of the camera for photographing the tire surface irradiated with the laser beam is equal to the vertical surface of the tire surface The angle is maintained so that the camera can acquire a clear image of the uneven portion of the tire.
Another problem to be solved by the present invention is to attach the displacement measuring sensor on the digital frame to optimize the distance between the tire and the sensor module in consideration of the beam width and the focus of the camera when the tire to be measured enters the digital frame. It is configured to obtain a constant tire profile by maintaining a constant distance.
In order to solve the problem of the present invention, a tire-shaped frame is installed in order to obtain a profile of a tire surface so that the tire can be quickly determined whether the tire is defective, and the laser beam is narrowly and widely irradiated in the width direction of the tire on the frame. A plurality of lasers and a camera for photographing a laser beam irradiated onto the tire surface, irradiating a laser beam to the surface of the tire, detecting the shape of the surface irradiated with the laser beam with a camera, and the laser and the camera are one The tire profile measuring device can be designed and manufactured by using a set of.
Another object of the present invention is to configure the laser and the camera as a set to be driven by a servo motor to correspond to the change in the tire specification is configured to maintain a constant distance between the surface of the tire and the laser and camera In order to perform this automatically, a displacement measuring sensor for detecting a distance from a tire surface is installed, and a tire profile measuring device is installed in which a servo motor is installed to rotate a tire to be measured at a constant speed.
Another solution of the present invention is to rotate the tire to be measured once, so that the adjacent laser beams formed by widening in the width direction of the tire so as to obtain the entire tire profile overlap each other, The present invention provides a tire profile measuring apparatus that can be quickly inspected by merging laser beam profiles with each other to obtain a full profile.
The present invention is equipped with a plurality of sensor modules in the "c" shaped frame to measure the outer profile of the entire surface irrespective of the change in the width and diameter of the tire, and rotates the tire quickly and accurately in one turn There is an effect of obtaining a profile efficiently.
Another effect of the present invention is to determine whether the tire is defective by quickly obtaining the profile of the tire in the field without undergoing a pretreatment process before measuring the profile of the tire.
Another effect of the present invention is to irradiate a laser beam to the surface in the width direction of the tire wide, the adjacent laser beam is configured to overlap each other, the angle of the laser beam and the camera for shooting the tire surface irradiated laser beam The angle is configured to maintain the same angle with respect to the vertical surface of the tire surface so that the camera can obtain a clear image of the uneven portion of the tire.
Another effect of the present invention is to attach the displacement measuring sensor on the deformed frame, so that the distance between the tire and the sensor module is optimized by considering the laser beam width and the focus of the camera when the measurement target tire enters the deformed frame. It is configured to maintain a constant to obtain an optimal clear tire profile.
1 is a schematic diagram of a tire profile measuring device designed according to the present invention. FIG.
3 is a view of merging profiles obtained by obtaining a tire profile by configuring four laser beams and a camera according to an embodiment of the present invention.
4 is a diagram illustrating a comparison process of measurement and design data according to the present invention.
5 is a view of processing the measurement results according to the present invention in three dimensions
<Brief Description of Drawings>
11;
13; Tire
Hereinafter, the present invention will be described in detail. The tire profile measuring device according to the present invention is provided with a depression-shaped frame in order to obtain a profile of the tire surface to quickly measure whether the tire is defective, and narrows the laser beam in the width direction of the tire on the frame. A camera for photographing a plurality of lasers and an irradiated laser beam, which are widely irradiated, is installed, and a laser beam is irradiated onto the surface of the tire, and the shape of the surface to which the laser beam is irradiated is detected by a camera. It consists of a set.
In addition, the present invention is configured to maintain a constant distance between the surface of the tire and the laser and the camera is driven by a servo motor to measure in response to changes in tire specifications by configuring a laser and a camera as a set In order to perform this automatically, a displacement measuring sensor for detecting the distance from the tire surface is installed on the frame of the tire, and a servo motor for rotating the tire for rotating the tire to be measured at a constant speed is installed. The laser beam is formed wide in the tire width direction so that the entire profile of the tire can be obtained by one rotation, so that the adjacent laser beam and the laser beam overlap each other, and the laser beam profiles obtained from the respective cameras are merged with each other to form the overall profile. The measurement is made quickly Can lose.
Hereinafter, the configuration and operation of the embodiments of the present invention with reference to the accompanying drawings, the configuration and operation of the present invention shown and described in the drawings will be described by at least one embodiment, whereby the present invention described above The technical idea and its core composition and operation are not limited.
A specific embodiment according to the present invention will be described.
<Example>
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will now be described with reference to the drawings. 1 shows an overall schematic diagram of a tire profile measuring device designed according to the present invention.
The technical configuration of the present invention will be described in detail with reference to FIG. 1. The tire profile measuring apparatus according to the present invention, as can be seen from Figure 1, because the width of the tire is wide, two laser and the camera is installed, one laser and one camera in the rotation axis direction, respectively. The beam generated by the laser is formed to be wide in the width direction of the tire and narrow in the rotation direction of the tire, and each
The present invention is installed so that the direction of the laser and the camera is located back and forth along the direction of rotation of the
The laser and the camera are installed in a set back and forth along the rotation direction of the measurement target tire, and designed and manufactured to move closer or farther away from the surface of the measurement target tire by a servomotor. C1 is one set, and L2 and C2, L3 and C3, and L4 and C4 are composed of one set. L1 to L4 are lasers and C1 to C4 represent cameras.
The angle of the laser and the camera and the distance from the tire surface may be variously designed and manufactured in consideration of the width and intensity of the laser beam and the focal length of the camera, and the number of cameras and lasers may also be changed in consideration of the sharpness and the laser beam width. Can be designed and manufactured.
Displacement measuring sensor is installed on one side of frame to detect distance from tire surface, and it is possible to move distance between tire surface, laser and camera to set value by using servo motor based on distance measured by displacement measuring sensor. It is.
The tire to be measured is configured to rotate at a constant speed by a servo motor about a rotation axis. In order to store the surface image data of the tire to be measured input from each camera in real time, it is designed and manufactured to rotate twice per minute (one rotation every 30 seconds).
The rotation speed can also be varied in consideration of the camera's performance and the computer's ability to process image data.
When the tire to be measured is rotated once by the servomotor, a plurality of cameras acquires the entire surface image profile of the tire to be measured, and merges the image profile obtained from each camera with software to produce the entire profile of the tire to be measured. Acquire.
The obtained measurement target tire profile is designed by designing the measurement target tire in CAD, and comparing the design data stored after design with how far the width and diameter of the tire deviated from the reference dimension to determine whether there is a defect. have.
Figure 2 is a flow chart showing the whole process of obtaining the surface profile of the measurement target tire using a tire profile measuring device designed and manufactured according to the present invention, and comparing the design data obtained in the design to determine whether the measurement target tire is defective. to be.
Referring to FIG. 2, the size of the tire to be measured is checked, the size of the tire is loaded into a computer, the seating of the tire to be measured is checked through a signal provided by a robot or a PLC, and the profile measuring laser and the camera are Check the readiness.
Rotating the measurement target tire to measure the profile of the tire surface with a plurality of cameras, the total profile data measured by each camera is merged by software designed and manufactured according to the present invention to obtain a full profile Through the steps, the coordinates of the entire profile of the tire to be measured are calculated.
Based on the size of the tire to be measured for measurement, the design coordinate data stored in the tire design and the coordinate data obtained from the previously obtained overall profile are compared with each other. If it is out of the tire to be measured is determined to be a bad tire.
FIG. 3 shows a profile of the surface shape of the tire to be measured in each area by using a plurality of lasers and cameras, finds correction points for each pixel from the profiles obtained by each camera, and compares the profile data obtained by each camera. The step of merging the profiles obtained by software designed to find the intersection points and connecting them to each other is shown two-dimensionally displaying the surface profile of the tire to be measured.
FIG. 4 compares the tire profile data merged from the measurement target tire with the data stored in the CAD design in two dimensions and / or three dimensions to determine whether the reference setting is out of the reference setting value, and the determination result is out of the set reference value. In the case of acknowledgment, the step of determining the failure is shown.
FIG. 5 illustrates a three-dimensional surface profile of a tire to be measured measured by a plurality of cameras using hardware and software designed and manufactured according to the present invention.
The laser and the components employed in the present invention may be replaced by various kinds of light sources and equivalent parts, which are designed and manufactured to obtain the surface profile of the tire to be measured.
The present invention is equipped with a plurality of sensor modules in the "c" -shaped frame to measure the outer profile of the entire surface irrespective of the change in the width and diameter of the tire to be measured, by rotating the tire quickly and in one rotation Accurately obtain the tire profile efficiently, and do not go through the pre-treatment process before measuring the tire profile, quickly obtain the profile of the tire to be measured in the field, compared to the design data determined and stored in the tire design, whether the target tire is defective It can be judged quickly, so the industrial availability is very high.
L1, L2, L3, L4; laser
Claims (6)
A plurality of lasers for irradiating a laser beam in a width direction of the measurement target tire to obtain a profile of the measurement target tire surface;
A plurality of cameras installed adjacent to the plurality of lasers and photographing a surface of the tire to be irradiated with a laser beam; And
By merging the measurement target tire surface image signals taken by the plurality of cameras with each other to display the surface profile of the measurement target tire on the monitor,
The laser and the camera are installed as a set, and in order to obtain a clear screen, the laser and the camera are installed with a displacement measuring sensor for detecting the distance from the surface of the tire to be measured, and the laser and the camera are set to a distance value set based on the distance measured by the displacement measuring sensor. Servo motor is fixed to move the camera.
When the plurality of lasers and cameras are installed, adjacent laser beams are installed to overlap each other, and images acquired by adjacent cameras are installed to overlap each other to merge the measurement target tire surface image signals photographed by the plurality of cameras. A tire profile measuring device configured to acquire and display a surface profile of a tire to be measured on a monitor.
The laser and the camera are installed in the front and rear along the tire rotation direction in order to obtain a clear screen image, the tire profile measuring device, characterized in that installed at the same angle relative to the surface perpendicular to the tire surface.
The profile measuring device compares the coordinate data of the entire profile obtained from the measurement target tire with the measurement target tire design coordinate data stored in the memory to determine whether the reference value is out of the set reference value. Tire profile measuring device characterized in that judged to be defective.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020100000169A KR101091943B1 (en) | 2010-01-04 | 2010-01-04 | A Measuring Apparatus of Tire Profile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020100000169A KR101091943B1 (en) | 2010-01-04 | 2010-01-04 | A Measuring Apparatus of Tire Profile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20110080030A KR20110080030A (en) | 2011-07-12 |
| KR101091943B1 true KR101091943B1 (en) | 2011-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1020100000169A KR101091943B1 (en) | 2010-01-04 | 2010-01-04 | A Measuring Apparatus of Tire Profile |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101857806B1 (en) | 2011-08-11 | 2018-05-14 | 엘지디스플레이 주식회사 | Liquid Crystal Display Device and Driving Method the same |
| KR101279639B1 (en) * | 2012-04-24 | 2013-06-27 | 주식회사 네스앤텍 | Device and method for inspecting tire |
| KR101398001B1 (en) * | 2012-12-24 | 2014-05-26 | 한국타이어 주식회사 | Text interference evasion method and system for laser carving of tire sidewall |
| CN103196679B (en) * | 2013-03-27 | 2015-08-05 | 麦苗 | Wheel alignment meter's long-range control method and system |
| JP6289283B2 (en) * | 2014-06-20 | 2018-03-07 | 株式会社ブリヂストン | Method for correcting surface shape data of annular rotating body, and appearance inspection device for annular rotating body |
| KR101697440B1 (en) * | 2015-10-30 | 2017-01-17 | 금호타이어 주식회사 | The Method for Uniformity Measuring of Tire Cure Bladder |
| CN111536903A (en) * | 2020-04-29 | 2020-08-14 | 浙江大学 | Device and method for measuring tire morphology by splicing multiple linear laser sensors |
| CN114993201A (en) * | 2022-05-25 | 2022-09-02 | 深圳市二郎神视觉科技有限公司 | Tire pattern detection device and method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000230818A (en) | 1999-02-10 | 2000-08-22 | Anzen Motor Car Co Ltd | Method and instrument for noncontact measurement of wheel alignment characteristic |
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2010
- 2010-01-04 KR KR1020100000169A patent/KR101091943B1/en not_active IP Right Cessation
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000230818A (en) | 1999-02-10 | 2000-08-22 | Anzen Motor Car Co Ltd | Method and instrument for noncontact measurement of wheel alignment characteristic |
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| KR20110080030A (en) | 2011-07-12 |
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