KR101164423B1 - active contact pressure measuring device of tire - Google Patents
active contact pressure measuring device of tire Download PDFInfo
- Publication number
- KR101164423B1 KR101164423B1 KR1020100024376A KR20100024376A KR101164423B1 KR 101164423 B1 KR101164423 B1 KR 101164423B1 KR 1020100024376 A KR1020100024376 A KR 1020100024376A KR 20100024376 A KR20100024376 A KR 20100024376A KR 101164423 B1 KR101164423 B1 KR 101164423B1
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- tire
- ground
- vehicle
- ground plate
- ground pressure
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Tires In General (AREA)
Abstract
The present invention relates to a tire ground pressure measuring apparatus which can be installed on the road surface and can measure the ground pressure of the tire in consideration of rolling resistance, braking and driving resistance, and turning movement generated between the tire and the road surface while the vehicle is actually traveling. .
The apparatus for measuring the dynamic ground pressure of a tire of the present invention is a device for measuring the ground pressure of a tire of a vehicle that is installed inside a manhole formed on a road, and is installed at an inlet of the manhole, and has fine unevenness on the outer surface and is transparent. A ground plate; A three-axis load cell installed on a bottom surface of the ground plate and measuring force acting on each direction of the x, y, and z axes generated in the tire by the weight of the vehicle and the movement conditions; Photographing means for photographing the ground plane of the tire in contact with the ground plate; And a computer having a program for calculating the dynamic ground pressure, the ground shape and the deformation amount of the tire from the signal sensed by the three-axis load cell and the photographing means.
Description
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for measuring tire ground pressure, and more particularly, to an apparatus for measuring dynamic ground pressure of a tire of a traveling vehicle.
In particular, the tire ground pressure and the amount of deformation generated between the tire and the road surface in the process of actually driving the vehicle are installed on the road surface to predict and analyze tire wear performance, steering stability (cornering), braking performance, rolling resistance, and the like. The present invention relates to a device for measuring the ground pressure of a tire which can be used.
Typically, tires play a very important role in driving a vehicle.
The tire's performance not only varies the wear performance in the ground shape and the ground pressure distribution, but also the steering stability, braking performance, driving performance, and fuel economy of the vehicle are determined, so the tire's ground pressure distribution is an important factor in determining the shape and characteristics of the tire. It is a standard factor.
Therefore, a method for ideally measuring the ground pressure distribution of the tire has been studied in various ways, and Patent No. 0240800 is one of the devices for measuring the ground pressure distribution of the tire.
As shown in FIG. 1, the tire ground pressure distribution measuring device includes: a transparent
The conventional tire ground pressure measuring device configured as described above has a problem in that the elastic medium plate and the no-warm lattice are separated from each other, which makes the installation inconvenient and does not sufficiently reflect the deformation of the elastic medium plate.
In addition, such a conventional tire ground pressure measuring device has a problem that the elastic plate is flat, which measures indirect friction between the elastic plate and the tire, and may be different from the actual tire ground pressure distribution depending on the state of the elastic medium plate. have.
That is, the conventional tire ground pressure measuring device can only detect the compressive deformation of the tire due to the load applied to the tire in a static state, but also measure the dynamic ground pressure when the tire rotates at high speed and rubs against the road surface. There is a problem that the amount of deformation occurring at the ground portion cannot be measured.
In addition, Utility Model Registration No. 370816 includes a tire friction performance measurement apparatus.
2, the test plate having an asphalt surface, and loaded with ice or snow at a predetermined height on the asphalt surface; A
In the conventional tire friction performance measuring apparatus configured as described above, the friction performance of the tire mounted on the vehicle actually running cannot be measured by measuring the friction performance of the tire in a state in which the actual celebration of the vehicle is not applied to the tire.
That is, in the case of tires installed on a vehicle traveling on the road, the axial load of the vehicle may vary from the front, rear, left and right tires according to the shift, direction change, braking and acceleration of the vehicle, resulting in different ground pressure and friction characteristics. The tire friction performance measuring apparatus has a disadvantage in that it is not possible to measure more substantial friction performance by measuring the friction performance of a tire rotating in a fixed frame.
In addition, in the case of the load cell constituting the tire friction performance measurement apparatus as described above to detect only the load of the plate had a disadvantage that can not detect the displacement according to the situation of the vehicle.
The present invention was developed to solve the problems of the prior art as described above, and a tire dynamic ground pressure measuring apparatus capable of measuring the ground pressure distribution and ground shape, and the amount of deformation of the ground portion applied to the tire while the tire rotates. It aims to provide.
In detail, the tire's ground pressure generated during the actual driving process, that is, the tire's ground pressure generated during the actual driving process, that is, between the tire and the road surface during the actual driving process, is not a deformation state of the tire that is deformed by the load applied to the tire in the static state. An object of the present invention is to provide a device for measuring the dynamic ground pressure of a tire capable of measuring more substantial dynamic grounding characteristics in consideration of changes in pressure, shape, rolling resistance, braking force, and lateral force.
The apparatus for measuring the dynamic ground pressure of a tire of the present invention is a device for measuring the ground pressure of a tire of a vehicle that is installed inside a manhole formed on a road, and is installed at the inlet of the manhole and has a fine unevenness formed on the outer surface thereof. With a ground plate; It is installed on the four pillar shafts at the corners of the ground plate to support the ground plate, and the front and rear forces (braking force and driving force, and the x-axis force generated according to the driving conditions of the vehicle and the z-axis load on which the tire is pressed by the weight of the vehicle) Rolling resistance), three-axis load cell for measuring the lateral force of the y-axis; An illumination device for clearly photographing the degree of compression by irradiating light to the uneven transparent ground plate to cause shadows on the compressed tire surface; Photographing means for photographing the ground plane of the tire in contact with the ground plate; And a computer having a program for calculating a dynamic ground pressure, a ground shape, and a deformation amount of the tire from the signal sensed by the three-axis load cell and the photographing means.
The present invention can measure the ground pressure of the tire installed on the vehicle actually running by using the measuring device installed on the road surface, and thus has the effect of detecting a more substantial ground pressure of the tire according to the situation of the road surface or the driving state of the vehicle.
In addition, unevenness is integrally formed on the ground plate in contact with the tire to provide friction with the tire, and the reflection, refraction, and scattering effects of light generated from the side are different according to the compressive strength of the rubber of the tire compressed to the unevenness. The difference in color appears with a digital camera to measure the tire's ground pressure, ground shape, and ground area.The tires with white lines at regular intervals on the surface continuously shoot at high speed when passing through the ground plate. The amount of deformation of the tire can be measured from the trajectory of the marked line.
In addition, a three-axis load cell is installed to measure the actual load of the vehicle, and the tire's ground pressure distribution is obtained by distributing the color difference of each pixel of the tire's ground shape photographed by the digital camera as the pressure difference as it passes through the ground plate. That is, by distributing the color difference of each pixel having a constant unit area to match the measured tire load and the ground area, it is possible to detect the tire's grounding characteristics more accurately by measuring the tire's ground pressure distribution.
1 is a configuration diagram of an example of a conventional ground pressure measuring device,
2 is a configuration diagram of another example of a conventional friction force measuring apparatus,
3 is a block diagram of a dynamic ground pressure measurement apparatus for a tire according to the present invention.
Hereinafter, with reference to the accompanying drawings a dynamic ground pressure measuring apparatus for a tire according to the present invention will be described in detail.
As shown in the drawing, the apparatus for measuring the ground pressure of the tire of the present invention is installed at the inside of the
The ground plate 1 is formed with fine irregularities on the surface that is in contact with the tire, and the irregularities may be formed in consideration of the state of the road surface, but the irregularities are detected by the photographing means and the ground characteristics of the tires (ground shape and Since it can be used as a means for measuring the ground pressure) is preferably formed at regular intervals.
The ground plate 1 must be transparent in order to allow the photographing means 3 installed at the bottom thereof to photograph the tire passing over the ground plate 1, and must be strong enough to pass through the vehicle. Therefore, it is preferable that the ground plate 1 is made of tempered glass or the like which is transparent and has excellent strength.
The unevenness formed in the ground plate 1 has a different direction of the angle of the light generated by the light source when pressed by the tire, and the image detected by the photographing means 3 is different due to the effect of the changed light. By taking this different image, the tire's ground pressure is sensed.
As shown in FIG. 3, the ground plate 1 is provided with the above-described three-
Of course, the load sensed by the
That is, in the
When the tire is inclined, the ground plate 1 may be deformed not only in the front-rear direction (the driving direction of the vehicle) but also in the left and right directions, and the force change due to the deformation is detected by the
The displacement sensed by the
Only one
An auxiliary device capable of checking and correcting the pressure measured by the ground plate 1 may be installed by forming a
One side of the ground pressure measuring device configured as described above is provided with a vehicle detecting means (5) for detecting the approaching vehicle.
As described above, the apparatus for measuring the dynamic ground pressure of the tire of the present invention can measure the tire installed in the vehicle passing through the vehicle installed on the road surface, and thus recognizes the moment when the vehicle passes the dynamic ground pressure measuring apparatus for the tire of the present invention. Thus, the vehicle detecting means 5 is installed in order to operate the photographing
A CCD camera or the like may be used as the photographing means 3, and a program for calculating the ground pressure provided in the
In the present invention, the purpose of the present invention is to detect the deformation state of the tire required by the calculation program, the displacement of the ground plate according to the situation of the vehicle, and this calculation program can be driven using the rules established through the test. Description is omitted.
In the process of measuring the characteristics of the tire using the apparatus for measuring the ground pressure of the tire according to the present invention as described above, the tire can be tested after drawing a white line at a predetermined interval, and the reason for testing the tire with this white line is This is to make it easier to grasp the deformation of the tire from the image continuously photographed at high speed by the shooting means 3 when the tire passes through the ground plate.
That is, the white lines drawn on the tires are drawn at regular intervals, and when these tires are pressed, they are contracted or expanded to change the distance between the trajectories of the lines and the lines, and the amount of deformation of the tire can be measured from the gaps between the changed lines.
4 is a photograph of a deformed state of the tire photographed by the photographing
As shown, the photographed image is displayed in a large area when the load on the tire is large, and the ground shape of the tire photographed in this way is that each pixel appears in a different color, and the difference in color is distributed as a pressure difference. The tire's ground pressure distribution is then obtained. As shown in FIG. 4, the process of transforming the image photographed as shown on the left side as shown at the right side can be achieved by a conventional image processing program, and thus detailed description thereof will be omitted.
By distributing the color difference of each pixel having a constant unit area to fit the measured tire load and the ground area, it is possible to detect the tire's grounding characteristics more accurately by measuring the tire's ground pressure distribution.
That is, the ground pressure of the pixel (pixel) having a certain area of the tire can be detected from the weight detected by the three-axis load cell at the moment when the tire passes the ground plate, the ground shape of the tire continuously photographed at high speed by the photographing means The amount of deformation can be calculated using the movement trajectory of the white lines drawn on the tire and the change of the distance between the lines, and this calculation process can be performed by a program provided in the computer as described above.
10: manhole
1: ground plate
2: 3-axis load cell
3: photographing means 3a: lighting device
4: computer
5: vehicle detection means
6: protective cover
7: free space
Claims (5)
A transparent ground plate (1) installed at the inlet of the manhole (10) and having fine irregularities formed on an outer surface thereof;
A three-axis load cell (2) installed on the bottom of the ground plate (1) to measure the force acting on each direction of the x, y, z axis generated in the tire by the weight and the movement of the vehicle;
Photographing means (3) for photographing the ground plane of the tire in contact with the ground plate (1);
An illumination device 3a for irradiating light to the uneven transparent ground plate to cause shadows on the compressed tire surface to clearly capture the degree of compression;
And a computer (4) having a program for calculating a dynamic ground pressure, a ground shape, and a deformation amount of the tire from the signals sensed by the triaxial load cell (2) and the photographing means (3). Earth pressure measuring device.
Fine grounding pressure measurement apparatus of the tire, characterized in that the minute unevenness formed in the ground plate (1) is formed at regular intervals.
The three-axis load cell (2) is respectively installed on the bottom of the four corners of the ground plate (1) to support the ground plate (1) and the ground pressure measuring apparatus of the tire for measuring the change in force in accordance with the movement conditions of the tire.
One side of the ground pressure measuring device is a vehicle ground pressure measuring apparatus for a tire, characterized in that the vehicle detecting means for detecting the approaching vehicle (4) is installed.
The ground plate (1) is a copper grounding pressure measuring device of the tire, characterized in that made of tempered glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020100024376A KR101164423B1 (en) | 2010-03-18 | 2010-03-18 | active contact pressure measuring device of tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020100024376A KR101164423B1 (en) | 2010-03-18 | 2010-03-18 | active contact pressure measuring device of tire |
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| Publication Number | Publication Date |
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| KR20110105237A KR20110105237A (en) | 2011-09-26 |
| KR101164423B1 true KR101164423B1 (en) | 2012-07-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1020100024376A KR101164423B1 (en) | 2010-03-18 | 2010-03-18 | active contact pressure measuring device of tire |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014171573A1 (en) | 2013-04-17 | 2014-10-23 | Jang Cheol Hwan | Module for sensing active contact pressure of tire, and tire testing apparatus using same |
| KR101829435B1 (en) * | 2016-06-17 | 2018-02-19 | (주)제이.케이.에스 | Analysis apparatus for dynamic footprint of the high speed rotating tire and method thereof |
| CN111650166A (en) * | 2020-05-20 | 2020-09-11 | 重庆大学 | Hydraulic erosion evolution simulation system and experimental method for transparent soil-rock mixture |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102445300B (en) * | 2011-10-09 | 2013-08-14 | 北京化工大学 | Dynamic grounding pressure test device |
| KR101305258B1 (en) * | 2012-04-18 | 2013-09-17 | 장철환 | Tire characteristics testing equipment |
| KR101489239B1 (en) * | 2013-08-08 | 2015-02-04 | 주식회사 천일시스템 | short track type tire testing equipment |
| KR101539386B1 (en) * | 2014-08-08 | 2015-07-27 | 장세정 | load cell and active contact pressure measuring device of tire by thereby |
| KR102248887B1 (en) * | 2019-11-21 | 2021-05-06 | 넥센타이어 주식회사 | Diagnostic system and method for pulling of vehicle |
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| KR200407073Y1 (en) | 2005-11-08 | 2006-01-23 | 황선성 | Apparatus of gauging the loadage of a truck |
| KR200419399Y1 (en) | 2006-04-10 | 2006-06-20 | 주식회사 고려아이텍 | Load weight measurement system of vehicle |
| KR200428592Y1 (en) | 2006-06-05 | 2006-10-16 | 지종흠 | Device of generation of electricity using vehicle loacl |
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2010
- 2010-03-18 KR KR1020100024376A patent/KR101164423B1/en active IP Right Grant
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200407073Y1 (en) | 2005-11-08 | 2006-01-23 | 황선성 | Apparatus of gauging the loadage of a truck |
| KR200419399Y1 (en) | 2006-04-10 | 2006-06-20 | 주식회사 고려아이텍 | Load weight measurement system of vehicle |
| KR200428592Y1 (en) | 2006-06-05 | 2006-10-16 | 지종흠 | Device of generation of electricity using vehicle loacl |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014171573A1 (en) | 2013-04-17 | 2014-10-23 | Jang Cheol Hwan | Module for sensing active contact pressure of tire, and tire testing apparatus using same |
| KR101829435B1 (en) * | 2016-06-17 | 2018-02-19 | (주)제이.케이.에스 | Analysis apparatus for dynamic footprint of the high speed rotating tire and method thereof |
| CN111650166A (en) * | 2020-05-20 | 2020-09-11 | 重庆大学 | Hydraulic erosion evolution simulation system and experimental method for transparent soil-rock mixture |
| CN111650166B (en) * | 2020-05-20 | 2021-04-06 | 重庆大学 | Hydraulic erosion evolution simulation system and experimental method for transparent soil-rock mixture |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20110105237A (en) | 2011-09-26 |
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