CN109946002B - Non-contact measuring rack for tire grounding pressure - Google Patents
Non-contact measuring rack for tire grounding pressure Download PDFInfo
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- CN109946002B CN109946002B CN201910144594.6A CN201910144594A CN109946002B CN 109946002 B CN109946002 B CN 109946002B CN 201910144594 A CN201910144594 A CN 201910144594A CN 109946002 B CN109946002 B CN 109946002B
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Abstract
The invention provides a non-contact measuring rack for tire ground pressure, which comprises: a support mechanism; the glass plate is arranged on the supporting mechanism; a light source; the first gantry support is arranged on the supporting mechanism and is positioned above the glass plate, the second gantry support is arranged inside the first gantry support, and two side walls of the second gantry support are in sliding connection with two side walls of the first gantry support; the force sensor is arranged at the top of the second gantry support; the lifting mechanism is arranged on the first gantry support and connected with the force sensor; the tire mounting mechanism is arranged on the second gantry support and used for mounting a tire; the image acquisition device is positioned below the glass plate and is used for acquiring a grounding diagram of the tire to be detected and the glass plate; the control system is connected with the image acquisition device, the lifting mechanism and the force sensor, and the tire grounding pressure measuring device realizes measurement of the tire grounding pressure based on a non-contact measurement method.
Description
Technical Field
The invention relates to the technical field of measuring tools, in particular to a non-contact measuring rack for tire grounding pressure.
Background
The tire is the only component of the vehicle that is in contact with the road surface, and therefore the performance of the tire has a large impact on the performance of various parts of the vehicle. The ground contact pressure characteristic index of the tire is closely related to the comprehensive ground contact performance of the tire, so that the accurate measurement of the ground contact pressure characteristic index of the tire is beneficial to tire development and vehicle performance research.
At present, the tire grounding pressure distribution testing method includes a pressure plate method, a pressure sensitive membrane method, a pressure sensor method, a non-contact measurement method and the like. The first two methods have lower accuracy, while the piezoelectric sensor method requires a large number of sensors and is more costly.
The non-contact measurement method is characterized in that the non-contact measurement method adopts an optical principle, a light source is arranged on two sides of glass, light makes total reflection movement in the glass, when a tire presses on the glass, total reflection failure occurs, the total reflection failure light is obtained through a camera, the grounding pressure of the tire is evaluated, the non-contact measurement method can control the manufacturing cost, the camera is used for shooting, and the image accuracy is guaranteed through the resolution of the camera, however, a mature non-contact measurement rack is not available at present.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a non-contact measuring rack for the tire grounding pressure, which is used for realizing the measurement of the tire grounding pressure based on a non-contact measuring method.
The present invention achieves the above-described object by the following technical means.
A non-contact measurement gantry of tire contact pressure, comprising:
a support mechanism;
the glass plate is arranged on the supporting mechanism in a manner of sliding left and right along the horizontal direction;
the front side and the rear side of the glass plate are provided with light sources;
the first gantry support is arranged on the supporting mechanism and is positioned above the glass plate, a second gantry support is arranged inside the first gantry support, and two side walls of the second gantry support are in sliding connection with two side walls of the first gantry support;
the force sensor is arranged at the top of the second gantry support;
the lifting mechanism is arranged on the first gantry support and is connected with the force sensor;
the tire mounting mechanism comprises a mounting shaft and a mounting block, the mounting block is arranged on the second gantry support, a through hole is formed in the mounting block, the mounting shaft can rotatably penetrate through the through hole of the mounting block, the mounting shaft is used for mounting a tire to be tested, and the glass plate can drive the tire to rotate by sliding left and right;
the image acquisition device is arranged on the supporting mechanism, is positioned below the glass plate and is used for acquiring a map of the tire to be detected and the glass plate;
and the control system is connected with the image acquisition device, the lifting mechanism and the force sensor, controls the movement of the lifting mechanism so as to control the loading on the tire, and analyzes the grounding pressure of the tire to be tested according to signals transmitted by the image acquisition device and the force sensor.
Preferably, the supporting mechanism comprises a first supporting frame and a second supporting frame, the top of the first supporting frame is provided with two first guide rails which are arranged in parallel, the glass plate is installed on the glass plate supporting frame, the bottom of the glass plate supporting frame is provided with two first sliding blocks, the first sliding blocks are in one-to-one corresponding sliding connection with the first guide rails, and the top of the second supporting frame is located above the glass plate.
Preferably, the glass plate support frame further comprises a first driving mechanism, the first driving mechanism comprises a stepping motor and a ball screw, the ball screw comprises a screw rod and a nut seat, the stepping motor is connected with the screw rod, and the nut seat is arranged on the lower surface of the glass plate support frame.
Preferably, the bottom of the first gantry support is arranged on the second support frame, and a first rotary bearing is arranged between the first gantry support and the second support frame, so that the first gantry support can rotate relative to the second support frame.
Preferably, the gantry crane further comprises a second driving mechanism, wherein the second driving mechanism is connected with the side wall of the first gantry support and used for driving the first gantry support to rotate relative to the second support frame.
Preferably, the second driving mechanism includes second driving motor and second worm gear worm mechanism, second worm gear worm mechanism includes second worm wheel and second worm, the second driving motor drive the second worm wheel rotates, the second worm with the second worm meshing, be provided with the knuckle on the lateral wall of first gantry support, the one end of second worm with the knuckle is connected, be equipped with the first displacement sensor who is used for measuring the second worm stroke on the second worm, first displacement sensor with second driving motor all with control system connects.
Preferably, the top of installation piece is equipped with the vertical axis, all be equipped with a horizontal axis on the left and right sides face of installation piece, be equipped with two bearing frames on the second gantry support, two the horizontal axis pass through the bearing with respectively with two the bearing frame is connected.
Preferably, the mounting device further comprises a third driving mechanism, wherein the third driving mechanism is connected with the vertical shaft on the mounting block and used for driving the vertical shaft to swing back and forth so as to drive the mounting shaft to swing up and down.
Preferably, the third driving mechanism includes a third driving motor and a third worm gear mechanism, the third worm gear mechanism includes a third worm gear and a third worm, the third driving motor drives the third worm gear to rotate, the third worm is meshed with the third worm, one end of the third worm is vertically connected with the vertical shaft, a second displacement sensor for measuring the stroke of the third worm is arranged on the third worm, and the second displacement sensor and the third driving motor are both connected with the control system.
Preferably, the third driving motor is mounted on a third support frame, the third support frame is mounted at the top of the second support frame, and a second rotary bearing is arranged between the third support frame and the second support frame.
The invention has the beneficial effects that:
1) the measuring rack is designed based on the principle of a non-contact measuring method, quantitative loading is carried out on tires through a lifting mechanism, the tires are driven to roll through the left and right movement of a glass plate, the state of the tires in rolling is simulated, an image acquisition device is arranged below the glass plate, a ground contact map of the tires under multiple working conditions is obtained through acquisition of ground contact marks of the tires, the acquired images are transmitted to a control system, and the ground contact pressure of the tires is analyzed by the control system.
2) The second support frame can rotate relative to the first support frame, so that the tire mounted on the mounting shaft can rotate around a plumb line, and the change of the slip angle of the tire is realized.
3) The two ends of the mounting block are provided with horizontal shafts, and the horizontal shafts are rotatably mounted on the second gantry support, so that the mounting block can rotate relative to the axis of the horizontal shafts, and the camber angle of the tire can be changed.
Drawings
FIG. 1 is a schematic diagram of a non-contact measurement method.
FIG. 2 is a first structural diagram of a non-contact measurement gantry for tire ground contact pressure according to an embodiment of the present invention.
FIG. 3 is a second structural diagram of a non-contact measurement gantry for tire ground contact pressure according to an embodiment of the present invention.
Fig. 4 is a third structural schematic diagram of a non-contact measurement platform for tire ground contact pressure according to an embodiment of the invention.
Fig. 5 is a schematic structural diagram of a first gantry support according to an embodiment of the present invention.
Fig. 6 is a partially enlarged view of a portion a in fig. 2.
Fig. 7 is a partial enlarged view of fig. 4 at B.
FIG. 8 is a schematic structural view of a tire mounting mechanism according to an embodiment of the present invention.
Reference numerals:
1. a lifting mechanism; 2. a first gantry support; 3. a force sensor; 4. a second gantry support; 5. a third drive mechanism; 6. connecting blocks; 7. a tire mounting mechanism; 8. installing a shaft; 9. a bearing seat; 10. a first slew bearing; 11. a third support frame; 12. a second slew bearing; 13. a second support frame; 14. a light source; 15. a glass plate; 16. a glass support frame; 17. a first guide rail; 18. a first support frame; 19. a work table; 20. a second guide rail; 21. a knuckle; 22. a connecting mechanism; 23. a nut seat; 24. a supporting seat; 25. a screw rod; 26. a fixed seat; 27. a coupling; 28. a first stepper motor; 29. a camera stand; 30. a camera; 31. a motor bracket; 32. a second drive mechanism; 33. a second displacement sensor; 34. a first displacement sensor; 35 mounting the block.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
First, a non-contact measurement stage for a tire ground contact pressure according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 2 to 8, a non-contact measurement platform for ground contact pressure of a tire according to an embodiment of the present invention includes: the device comprises a workbench 19, a supporting mechanism, a glass plate 15, a light source 14, a first gantry support 2, a first driving mechanism, a force sensor 3, a lifting mechanism 1, a tire mounting mechanism, a second driving mechanism 32, a structure 5 of a third driving mechanism, an image acquisition device and a control system.
Specifically, as shown in fig. 2, the supporting mechanism is formed by welding angle iron and rectangular steel, and includes a first supporting frame 18 and a second supporting frame 13, the first supporting frame 18 and the second supporting frame 13 are both mounted on a workbench 19, and the top of the second supporting frame 13 is located above the glass plate 15. The top of first support frame 18 is equipped with two parallel arrangement's first guide rail 17, glass board 15 installs on glass board support frame 16, set up along the horizontal direction, glass support frame 16 is formed by the welding of rectangular steel, the bottom of glass board support frame 16 is equipped with two first sliding blocks, first sliding block and the sliding connection of first guide rail 17 one-to-one, thereby make glass board 15 can be for first support frame 18 horizontal migration, the both sides that glass made frame 16 all are provided with light source 14, be used for making light be total reflection motion in glass board 15.
As shown in fig. 3, the first driving mechanism includes a stepping motor 28 and a ball screw, the ball screw includes a screw 25 and a nut seat 23, the side of the first support frame 18 is connected with a fixed seat 26, a support seat 24 and a motor support 31 through threads, two ends of the screw 25 are respectively connected with the fixed seat 26 and the support seat 24 through bearings, the stepping motor 28 is connected with the motor support 31 through threads, a motor shaft is connected with the screw 25 through a coupling 27, the nut seat 23 is matched with the screw 25, and two sides of the connecting mechanism 22 are connected with the nut seat 23 and the glass support frame 16 through threads. The rotation of the stepping motor 28 enables the screw rod 25 to rotate, and drives the nut seat 23 to move left and right, so that the glass plate support frame 16 is driven to move left and right, and further the glass plate 15 moves left and right.
As shown in fig. 2, the first gantry support 2 is mounted on the second support frame 13 and located above the glass plate 15, the second gantry support 4 is arranged inside the first gantry support 2, the outer side surfaces of the two side walls of the second gantry support 4 are provided with second slide blocks, the inner side surfaces of the two side walls of the first gantry support 2 are provided with second guide rails, and the second slide blocks are in one-to-one corresponding sliding connection with the second guide rails, so that the second gantry support 4 can move up and down in the first gantry support 2.
As shown in fig. 4 and 8, the tire mounting mechanism includes a mounting shaft 8 and a mounting block 35, the mounting block 35 is disposed on the second gantry support 4, a through hole is formed in the mounting block 35, the mounting shaft 8 rotatably penetrates through the through hole of the mounting block 35 through a bearing, a coaxial turntable is fixed on the mounting shaft 8, a tire to be tested is mounted on the mounting shaft 8 through a conical fixing block and a nut, and the turntable and the conical fixing block are used for axially positioning the tire to be tested. Initially, the tire to be tested is mounted at the center of the glass plate 15 as much as possible, and the movement of the glass plate 15 can drive the tire to roll, so that the state of the tire during rolling can be simulated.
Force sensor 3 installs in the top face of second gantry support 4, elevating system 1 installs on first gantry support 2, including first driving motor and first worm gear mechanism, first worm gear includes first turbine and first worm, the vertical setting of first worm, the bottom and the force sensor 3 of first worm are connected, first driving motor drives first turbine and rotates, thereby make first worm reciprocate, and then drive second gantry support 4 and reciprocate, the ration loading to the tire has been realized, and can measure the loading force of elevating system 1 to the tire through force sensor 3.
The image acquisition device is a camera 30, the camera 30 is installed on the first support frame 18 through a camera bracket 29, the camera 30 is positioned below the glass plate 15, and the glass plate 15 is used for not only simulating a road surface, but also performing an optical test conveniently, so that the camera 30 shoots a ground contact blot of the tire below to obtain a ground contact diagram of the tire.
The control system is connected with the camera 30, the first driving motor and the force sensor 3, controls the movement of the lifting mechanism 1 so as to control the loading of the tire, and analyzes the grounding pressure of the tire to be tested according to signals transmitted by the image acquisition device and the force sensor 3.
In order to simulate various working conditions, the embodiment of the invention can change the slip angle of the tire, and specifically comprises the following steps: the second driving mechanism 32 includes a second driving motor and a second worm gear mechanism, as shown in fig. 5, the second driving motor is mounted on the third support frame 11, the third support frame 11 is mounted on the top of the second support frame 13, and a second pivot bearing 12 is disposed between the third support frame 11 and the second support frame 13, so that the third support frame 11 can rotate relative to the second support frame 13, the second worm gear mechanism includes a second worm gear and a second worm, the second driving motor drives the second worm gear to rotate, the second worm is engaged with the second worm, a knuckle 21 is disposed on a side wall of the first gantry support 2, one end of the second worm is connected with the knuckle 21, as shown in fig. 7, a first displacement sensor 34 for measuring a stroke of the second worm is disposed on the second worm, and both the first displacement sensor 34 and the second driving motor are connected with the control system. A first rotary bearing 10 is arranged between the first gantry support 2 and the second support frame 13, so that the first gantry support 2 can rotate relative to the second support frame 13. The second driving motor drives the second turbine to rotate, so that the second worm extends out, the first gantry support 2 rotates around a plumb line, the tire rotates along with the first gantry support 2, the slip angle of the tire is changed, and the change amount of the slip angle is accurately measured through the first displacement sensor 34.
Embodiments of the invention may vary the camber angle of a tire, specifically: the top of installation piece 35 is equipped with the vertical axis, all is equipped with a horizontal axis on the left and right sides face of installation piece 35, is equipped with two bearing frames 9 on the second gantry support 4, and two horizontal axes pass through the bearing and are connected with two bearing frames 9 respectively for installation piece 35 can rotate round the axis of horizontal axis.
The third driving mechanism 5 comprises a third driving motor and a third worm gear mechanism, the third worm gear mechanism comprises a third worm gear and a third worm, the third driving motor drives the third worm gear to rotate, and the third worm is meshed with the third worm. The vertical shaft is provided with a connecting block 6, the connecting block 6 comprises two mutually perpendicular cylindrical barrels, one cylindrical barrel is fixed on the vertical shaft, the other cylindrical barrel is fixed at one end of the third worm so as to realize that one end of the third worm is perpendicularly connected with the vertical shaft, as shown in fig. 7, the third worm is provided with a second displacement sensor 33 for measuring the stroke of the third worm, and the second displacement sensor 33 and the third driving motor are both connected with the control system. The back and forth movement of the third worm drives the vertical shaft to swing back and forth, thereby causing the mounting shaft 8 to swing up and down to achieve a change in camber angle of the tire, and the change in camber angle is accurately measured by the second displacement sensor 33.
The working principle of the invention is as follows: when loading is needed, the lifting mechanism 1 is adjusted, so that the tire can move up and down, and when the tire is in contact with the glass plate 15, the force sensor 3 can reflect the loading condition of the tire and transmit the loading condition to the control system. The third drive mechanism 5 is adjusted to adjust the camber angle of the tire by pulling the vertical axis on the steering mounting block 35, and the change in camber angle is measured by the second displacement sensor 33. The second driving mechanism 32 is adjusted, the slip angle of the tire is adjusted by pulling the first gantry support 2, and the change in slip angle is measured by the first displacement sensor 34. The first, second and third stepper motors are controlled by a control system which adjusts the stepper motor 28 so that the glass plate 15 moves forward and backward to drive the tire to roll. The dynamic footprint of the tire is photographed by the camera 30, the control system can obtain the ground pressure map of the tire by the image processing technology, and the ground pressure of the tire under different working conditions is analyzed by combining signals transmitted by the force sensor 3, the first displacement sensor 34 and the second displacement sensor 33.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention.
Claims (8)
1. A non-contact measurement bench for tire ground contact pressure, comprising:
the supporting mechanism comprises a first supporting frame (18) and a second supporting frame (13), and two first guide rails (17) which are arranged in parallel are arranged at the top of the first supporting frame (18);
the glass plate (15) is arranged on the glass plate support frame (16), two first sliding blocks are arranged at the bottom of the glass plate support frame (16), the first sliding blocks are in one-to-one corresponding sliding connection with the first guide rails (17), and the top of the second support frame (13) is positioned above the glass plate (15);
the light source (14) is arranged on the front side and the rear side of the glass plate (15);
the bottom of the first gantry support (2) is arranged on the second support frame (13), a first rotary bearing (10) is arranged between the first gantry support (2) and the second support frame (13), so that the first gantry support (2) can rotate relative to the second support frame (13), a second gantry support (4) is arranged inside the first gantry support (2), and two side walls of the second gantry support (4) are slidably connected with two side walls of the first gantry support (2);
the force sensor (3) is arranged at the top of the second gantry support (4);
the lifting mechanism (1) is arranged on the first gantry support (2), and the lifting mechanism (1) is connected with the force sensor (3);
the tire mounting mechanism comprises a mounting shaft (8) and a mounting block (35), the mounting block (35) is arranged on the second gantry support (4), a through hole is formed in the mounting block (35), the mounting shaft (8) can rotatably penetrate through the through hole of the mounting block (35), the mounting shaft (8) is used for mounting a tire to be tested, and the glass plate (15) can drive the tire to rotate when sliding left and right;
the image acquisition device is arranged on the supporting mechanism, is positioned below the glass plate (15), and is used for acquiring a grounding diagram of the tire to be detected and the glass plate (15);
the control system is connected with the image acquisition device, the lifting mechanism (1) and the force sensor (3), controls the movement of the lifting mechanism (1) so as to control the loading of the tire, and analyzes the grounding pressure of the tire to be tested according to the signals transmitted by the image acquisition device and the force sensor (3).
2. The non-contact measurement bench for tire ground contact pressure according to claim 1, further comprising a first driving mechanism comprising a stepping motor (28) and a ball screw, the ball screw comprising a screw rod (25) and a nut seat (23), the stepping motor (28) being connected with the screw rod (25), the nut seat (23) being provided on a lower surface of the glass plate support frame (16).
3. The non-contact measurement bench for tire ground contact pressure according to claim 1, characterized by further comprising a second driving mechanism (32), wherein the second driving mechanism (32) is connected with the side wall of the first gantry support (2) for driving the first gantry support (2) to rotate relative to the second support frame (13).
4. The non-contact measurement rack for the tire ground contact pressure according to claim 3, characterized in that the second driving mechanism (32) comprises a second driving motor and a second worm gear mechanism, the second worm gear mechanism comprises a second worm gear and a second worm screw, the second driving motor drives the second worm gear to rotate, the second worm screw is meshed with the second worm screw, a steering knuckle (21) is arranged on the side wall of the first gantry support (2), one end of the second worm screw is connected with the steering knuckle (21), a first displacement sensor (34) for measuring the stroke of the second worm screw is arranged on the second worm screw, and the first displacement sensor (34) and the second driving motor are both connected with the control system.
5. The non-contact measurement rack for the tire grounding pressure as claimed in claim 1, wherein a vertical shaft is arranged at the top of the mounting block (35), a horizontal shaft is arranged on each of the left side surface and the right side surface of the mounting block (35), two bearing seats (9) are arranged on the second gantry support (4), and the two horizontal shafts are respectively connected with the two bearing seats (9) through bearings.
6. The non-contact measurement bench for tire ground contact pressure according to claim 5, further comprising a third driving mechanism connected to the vertical shaft of the mounting block (35) for driving the vertical shaft to swing back and forth, thereby driving the mounting shaft (8) to swing up and down.
7. The non-contact measurement bench of tire ground contact pressure according to claim 6, characterized in that the third driving mechanism (5) comprises a third driving motor and a third worm gear mechanism, the third worm gear mechanism comprises a third worm gear and a third worm, the third driving motor drives the third worm gear to rotate, the third worm is meshed with the third worm, one end of the third worm is perpendicularly connected with the vertical shaft, a second displacement sensor (33) for measuring the stroke of the third worm is arranged on the third worm, and the second displacement sensor (33) and the third driving motor are both connected with the control system.
8. The non-contact measurement bench for tire ground contact pressure according to claim 4, characterized in that the second driving motor is mounted on a third support frame (11), the third support frame (11) is mounted on top of the second support frame (13), and a second rotary bearing (12) is arranged between the third support frame (11) and the second support frame (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910144594.6A CN109946002B (en) | 2019-02-27 | 2019-02-27 | Non-contact measuring rack for tire grounding pressure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910144594.6A CN109946002B (en) | 2019-02-27 | 2019-02-27 | Non-contact measuring rack for tire grounding pressure |
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| Publication Number | Publication Date |
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| CN109946002A CN109946002A (en) | 2019-06-28 |
| CN109946002B true CN109946002B (en) | 2021-02-12 |
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| CN201910144594.6A Active CN109946002B (en) | 2019-02-27 | 2019-02-27 | Non-contact measuring rack for tire grounding pressure |
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| CN112326087B (en) * | 2021-01-04 | 2021-04-23 | 湖南大学 | Vehicle contact time-course force measuring method and device based on video identification |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0749938B2 (en) * | 1989-11-02 | 1995-05-31 | 住友ゴム工業株式会社 | Tire contact surface observation device and observation method |
| US5357799A (en) * | 1992-07-14 | 1994-10-25 | Bridgestone Corporation | Method and apparatus for determining abrasion potential of tire treads |
| US5777219A (en) * | 1996-10-16 | 1998-07-07 | Bridgestone/Firestone, Inc. | Apparatus and related methods for automatically testing and analyzing tires utilizing a test pod with a slidably movable cover plate and a gray scale normalization technique |
| CN100442008C (en) * | 2005-08-08 | 2008-12-10 | 旭东机械(昆山)有限公司 | Tyre detection device |
| KR101484504B1 (en) * | 2013-04-17 | 2015-01-20 | 장철환 | Active contact pressure measuring module and Tire testing equipment thereby |
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Effective date of registration: 20230607 Address after: 545616 No.1, Guandong Road, Luorong Town, Liuzhou City, Guangxi Zhuang Autonomous Region Patentee after: GUANGXI LINGLONG TIRE Co.,Ltd. Address before: Zhenjiang City, Jiangsu Province, 212013 Jingkou District Road No. 301 Patentee before: JIANGSU University |