CN112345275A - Tire pattern measuring device and method - Google Patents
Tire pattern measuring device and method Download PDFInfo
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- CN112345275A CN112345275A CN202011208767.5A CN202011208767A CN112345275A CN 112345275 A CN112345275 A CN 112345275A CN 202011208767 A CN202011208767 A CN 202011208767A CN 112345275 A CN112345275 A CN 112345275A
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000007547 defect Effects 0.000 claims abstract description 12
- 238000005096 rolling process Methods 0.000 claims abstract description 10
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000001514 detection method Methods 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000001360 synchronised effect Effects 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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- 238000011326 mechanical measurement Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/02—Tyres
- G01M17/027—Tyres using light, e.g. infrared, ultraviolet or holographic techniques
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/22—Measuring arrangements characterised by the use of optical techniques for measuring depth
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/30—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces
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- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention relates to a tire pattern measuring device and a method, wherein a first wheel to be measured is positioned between a first roller and a second roller, the first roller is driven to rotate by a motor, so that the first wheel to be measured is driven to rotate, the tire surface of the first wheel to be measured is scanned by a two-dimensional laser scanning device within a set rolling time, a first three-dimensional stereo image of the tire pattern of the first wheel to be measured is obtained, the flatness and the defect of the tire pattern of the first wheel to be measured are detected by the first three-dimensional stereo image, the interference of human factors is reduced, and the detection accuracy is improved.
Description
Technical Field
The invention relates to the technical field of vehicle detection, in particular to a tire pattern measuring device and method.
Background
At present, the tire patterns are measured by adopting a handheld mechanical measuring method, the shallowest part of the tire patterns needs to be found manually, manual mechanical measurement is carried out, the measured values are influenced manually, and meanwhile, the tire patterns cannot be compared.
Disclosure of Invention
Based on this, the invention aims to provide a tire pattern measuring device and method, which can improve the detection accuracy.
In order to achieve the purpose, the invention provides the following scheme:
a tire pattern measuring device comprising:
the device comprises a motor, a first roller, a second roller, a third roller, a fourth roller, a two-dimensional laser scanning device, a lifting device and a controller;
the rotor of the motor is coaxially connected with the first roller, the first roller is coaxially connected with the second roller, and the central axis of the third roller is collinear with the central axis of the fourth roller; the central axis of the first roller and the central axis of the third roller are parallel to each other; the first roller and the second roller are arranged on one side of the lifting device, and the third roller and the fourth roller are arranged on the other side of the lifting device;
positioning a first wheel to be tested and a second wheel to be tested on the same shaft onto the lifting device, descending the lifting device to enable the first wheel to be tested to be pressed between the first roller and the third roller, and enabling the second wheel to be tested to be pressed between the second roller and the fourth roller;
the motor drives the first roller to rotate, and the first roller rotates to drive the first wheel to be tested and the second wheel to be tested to rotate;
when the first wheel to be tested and the second wheel to be tested rotate, the two-dimensional laser scanning device respectively scans the tires of the first wheel to be tested and the tires of the second wheel to be tested;
the controller is electrically connected with the two-dimensional laser scanning device and is used for respectively obtaining the tire patterns of the first wheel to be tested and the second wheel to be tested.
Optionally, the first roller and the third roller are connected by a timing belt, and the second roller and the fourth roller are connected by a timing belt.
Optionally, the two-dimensional laser scanning device includes a first two-dimensional laser scanning device and a second two-dimensional laser scanning device, the first two-dimensional laser scanning device is disposed on the other side of the third drum close to the lifting device, and the second two-dimensional laser scanning device is disposed on the other side of the fourth drum close to the lifting device;
determining an included angle between a two-dimensional laser surface emitted by the first two-dimensional laser scanning device and a horizontal plane through the distance between the first roller and the third roller, the height difference between the first two-dimensional laser scanning device and the first roller center, the distance between the middle point of the connecting line of the first roller center and the third roller center and the first two-dimensional laser scanning device, the radius of the first wheel to be detected and the radius of the first roller, so that the two-dimensional laser surface is vertically incident on a tire of the first wheel to be detected; the included angle between the two-dimensional laser surface emitted by the second two-dimensional laser scanning device and the horizontal plane is the same as the included angle between the two-dimensional laser surface emitted by the first two-dimensional laser scanning device and the horizontal plane.
Optionally, the tire pattern measuring device further comprises an auxiliary measuring device, wherein the auxiliary measuring device comprises a plurality of parallel rollers, and when the vehicle to which the first wheel to be measured and the second wheel to be measured belong is a four-wheel drive vehicle, when the first wheel to be measured and the second wheel to be measured of one shaft are positioned on the lifting device, the third wheel to be measured and the fourth wheel to be measured of the other shaft are supported to rotate.
Optionally, the tire pattern measuring device further comprises a light transmitting device, the light transmitting device is coplanar with the ground plane, the two-dimensional laser scanning device is arranged below the ground plane, and laser emitted by the two-dimensional laser scanning device penetrates through the light transmitting device to irradiate the first wheel to be measured and the second wheel to be measured.
The invention also discloses a tire pattern measuring method, which is applied to any tire pattern measuring device, and comprises the following steps:
positioning the first wheel to be tested and the second wheel to be tested on the same shaft on the lifting device;
controlling the lifting device to descend to enable the first wheel to be tested to be pressed between the first roller and the third roller, and enable the second wheel to be tested to be pressed between the second roller and the fourth roller;
the motor drives the first wheel to be tested and the second wheel to be tested to rotate;
respectively scanning the tires of the first wheel to be detected and the second wheel to be detected through the two-dimensional laser scanning device according to the set rolling time to obtain a first three-dimensional stereo image of the tire pattern of the first wheel to be detected and a second three-dimensional stereo image of the tire pattern of the second wheel to be detected;
and detecting the first wheel tyre pattern to be detected according to the first three-dimensional stereo image, and detecting the second wheel tyre pattern to be detected according to the second three-dimensional stereo image.
Optionally, the detecting the first wheel tire pattern to be detected according to the first three-dimensional perspective view and the detecting the second wheel tire pattern to be detected according to the second three-dimensional perspective view specifically include:
comparing the first three-dimensional stereo image with the standard tire pattern of the type of the first wheel tire to be tested to obtain the flatness and the defect degree of the tire pattern of the first wheel tire to be tested;
and comparing the second three-dimensional stereo image with the standard tire pattern of the model of the second wheel tire to be tested to obtain the flatness and the defect degree of the second wheel tire pattern to be tested.
Optionally, the set rolling time is determined according to the radius of the first wheel to be measured, the radius of the first roller and the rotating speed of the motor.
Optionally, the positioning the first wheel to be measured and the second wheel to be measured of the same axle on the lifting device specifically includes:
and positioning the first wheel to be tested and the second wheel to be tested through the correlation photoelectric switch.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention discloses a tire pattern measuring device and a method, wherein a first wheel to be measured is positioned between a first roller and a second roller, the first roller is driven to rotate by a motor, so that the first wheel to be measured is driven to rotate, the tire surface of the first wheel to be measured is scanned by a two-dimensional laser scanning device within a set rolling time to obtain a first three-dimensional stereogram of the tire pattern of the first wheel to be measured, and the flatness and the defect of the tire pattern of the first wheel to be measured are detected by the first three-dimensional stereogram, so that the interference of human factors is reduced, and the detection accuracy is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic view of a tire tread measuring device according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a calculation of an included angle between a two-dimensional laser plane emitted by a two-dimensional laser scanning device and a horizontal plane according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating an ascending state of a lifting device according to an embodiment of the present invention;
FIG. 4 is a schematic view illustrating a descending state of a lifting device according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of the positional relationship between the opposed photoelectric switch and the first and third rollers according to the embodiment of the present invention;
FIG. 6 is a schematic view of an auxiliary measuring device according to an embodiment of the present invention;
FIG. 7 is a schematic flow chart of a tire pattern measurement method according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a tire pattern measuring system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a tire pattern measuring device and method, which improve the accuracy of detection.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Fig. 1 is a schematic view of a tire pattern measuring apparatus according to the present invention, and as shown in fig. 1, a tire pattern measuring apparatus includes:
a motor 1, a first roller 21, a second roller 22, a third roller 23 and a fourth roller 24, a two-dimensional laser scanning device 7, a lifting device 3 and a controller.
The rotor of the motor 1 is coaxially connected with the first roller 21, the first roller 21 is coaxially connected with the second roller 22, and the third roller 23 is coaxially connected with the fourth roller 24; the central axis of the first roller 21 and the central axis of the third roller 23 are parallel to each other; the first roller 21 and the second roller 22 are disposed at one side of the lifting device 3, and the third roller 23 and the fourth roller 24 are disposed at the other side of the lifting device 3.
The first wheel to be measured and the second wheel to be measured of the same axle are positioned on the lifting device 3.
The tyre pattern measuring device also comprises a correlation photoelectric switch 5 and a prompting device. The correlation photoelectric switch 5 is used for positioning the first wheel to be measured and the second wheel to be measured. When the first wheel to be tested and the second wheel to be tested are positioned to accurate positions, namely the first wheel to be tested and the second wheel to be tested are stopped on the lifting device 3, the prompting device is used for prompting a driver to stop. Two opposed photoelectric switches 5 are respectively located at two sides of the lifting device 3 in the length direction, and the relative position relationship between one opposed photoelectric switch 5 and the first roller 21 and the second roller 22 is shown in fig. 5.
The lifting device 3 is in an initial state of a rising state, when the first wheel to be measured and the second wheel to be measured stop above the lifting device 3, the correlation photoelectric switch 5 sends a positioning signal and sends the positioning signal to the controller, the controller controls the lifting device 3 to be in a falling state according to the positioning signal, a schematic diagram of the rising state of the lifting device 3 is shown in fig. 3, and a schematic diagram of the falling state of the lifting device 3 is shown in fig. 4.
The lifting device 3 descends to enable the first wheel to be tested to be pressed between the first roller 21 and the third roller 23, and the second wheel to be tested to be pressed between the second roller 22 and the fourth roller 24.
The motor 1 drives the first roller 21 to rotate, and the first roller 21 rotates to drive the first wheel to be tested and the second wheel to be tested to rotate. Specifically, motor 1 rotates and drives first cylinder 21 and rotate, and first cylinder 21 drives second cylinder 22 and rotates, first cylinder 21 drives first wheel rotation that awaits measuring, second cylinder 22 drives the second wheel rotation that awaits measuring, first wheel that awaits measuring drives third cylinder 23 rotates, the second wheel that awaits measuring drives fourth cylinder 24 rotates.
When the first wheel to be tested and the second wheel to be tested rotate, the two-dimensional laser scanning device 7 respectively scans the tires of the first wheel to be tested and the tires of the second wheel to be tested.
The controller is electrically connected with the two-dimensional laser scanning device 7 and is used for respectively obtaining tire patterns of the first wheel to be detected and the second wheel to be detected.
The first roller 21 and the third roller 23 are connected by a timing belt 4, and the second roller 22 and the fourth roller 24 are connected by a timing belt 4. In this embodiment, the first roller 21 drives the third roller 23 to rotate through the synchronous belt 4, and the second roller 22 drives the fourth roller 24 to rotate through the synchronous belt 4. The first roller 21 and the third roller 23 drive the first wheel to be tested to rotate together, and the second roller 22 and the fourth roller 24 drive the second wheel to be tested to rotate together.
The two-dimensional laser scanning device 7 comprises a first two-dimensional laser scanning device and a second two-dimensional laser scanning device, the first two-dimensional laser scanning device is arranged on the other side, close to the lifting device 3, of the third roller 23, and the second two-dimensional laser scanning device is arranged on the other side, close to the lifting device 3, of the fourth roller 24.
Determining an included angle Q between a two-dimensional laser plane emitted by the first two-dimensional laser scanning device and a horizontal plane through a distance L0 between the first roller 21 and the third roller 23, a height difference H0 between the first two-dimensional laser scanning device and the center of the first roller 21, a distance L1 between a midpoint of a connecting line between the center of the first roller 21 and the center of the third roller 23 and the first two-dimensional laser scanning device, a radius R of the first wheel to be measured and a radius R0 of the first roller 21, wherein the calculation principle of the included angle Q is shown in fig. 2, and the calculation process is as follows:
the method comprises the following steps of (1) enabling a two-dimensional laser plane to be vertically incident on a tire of a first wheel to be tested, wherein the angle Q is ctan ((H-H0)/L1); the center of the first roller 21 is the center of the circle where the cross section of the first roller 21 is located, and the center of the second roller 22 is the center of the circle where the cross section of the second roller 22 is located; the included angle between the two-dimensional laser surface emitted by the second two-dimensional laser scanning device and the horizontal plane is the same as the included angle between the two-dimensional laser surface emitted by the first two-dimensional laser scanning device and the horizontal plane.
The tire pattern measuring device further comprises an auxiliary measuring device, wherein the auxiliary measuring device comprises a plurality of parallel rollers, and when the first wheel to be measured and the second wheel to be measured belong to the four-wheel drive vehicle, the first wheel to be measured and the second wheel to be measured of one shaft are positioned on the lifting device 3, and the third wheel to be measured and the fourth wheel to be measured of the other shaft are supported to rotate. The auxiliary measuring device comprises a first auxiliary measuring device 8 and a second auxiliary measuring device 9, wherein the first auxiliary measuring device 8 and the second auxiliary measuring device 9 are divided into two sides of an integrated device consisting of a motor 1, a first roller 21, a second roller 22, a third roller 23, a fourth roller 24, a two-dimensional laser scanning device 7 and a lifting device 3. The specific structure of the auxiliary measuring device is shown in fig. 6.
The tire pattern measuring device further comprises a light transmitting device 6, the light transmitting device 6 is coplanar with the ground plane, the two-dimensional laser scanning device 7 is arranged below the ground plane, laser emitted by the two-dimensional laser scanning device 7 penetrates through the light transmitting device 6 to irradiate the first wheel to be measured and the second wheel to be measured.
Fig. 7 is a schematic flow chart of a tire pattern measuring method according to the present invention, and as shown in fig. 7, the tire pattern measuring method includes:
step 101: positioning the first wheel to be measured and the second wheel to be measured on the same shaft on the lifting device 3.
Step 102: and controlling the lifting device 3 to descend so that the first wheel to be tested is pressed between the first roller 21 and the third roller 23, and the second wheel to be tested is pressed between the second roller 22 and the fourth roller 24.
Step 103: the motor 1 drives the first wheel to be tested and the second wheel to be tested to rotate;
and respectively scanning the tires of the first wheel to be detected and the second wheel to be detected through the two-dimensional laser scanning device 7 according to the set rolling time to obtain a first three-dimensional stereo image of the tire pattern of the first wheel to be detected and a second three-dimensional stereo image of the tire pattern of the second wheel to be detected.
Step 104: and detecting the first wheel tyre pattern to be detected according to the first three-dimensional stereo image, and detecting the second wheel tyre pattern to be detected according to the second three-dimensional stereo image.
The controller is internally stored with a tire pattern library which comprises three-dimensional stereograms of tire patterns of various types of tires delivered from a factory. According to the tire pattern library, a three-dimensional perspective view of the tire pattern corresponding to the tire type (model) can be obtained through the tire type (model). Wherein the standard tire pattern is the tire pattern of the wheel to be tested when the wheel tire leaves the factory.
The detecting the first to-be-detected wheel tyre pattern according to the first three-dimensional stereo image and the detecting the second to-be-detected wheel tyre pattern according to the second three-dimensional stereo image specifically include:
and comparing the first three-dimensional stereo image with the standard tire pattern of the model of the first wheel tire to be tested to obtain the flatness and the defect degree of the tire pattern of the first wheel tire to be tested. Specifically, the method comprises the following steps: comparing the first three-dimensional perspective view with a three-dimensional perspective view of a standard tire pattern; and judging whether the first three-dimensional stereo image is consistent with the three-dimensional stereo image of the standard tire pattern, and if not, further obtaining the flatness and the defect degree of the first wheel tire pattern to be detected by comparing the first three-dimensional stereo image with the three-dimensional stereo image of the standard tire pattern.
And comparing the second three-dimensional stereo image with the standard tire pattern of the model of the second wheel tire to be tested to obtain the flatness and the defect degree of the second wheel tire pattern to be tested. Specifically, the method comprises the following steps: comparing the second three-dimensional perspective view with the three-dimensional perspective view of the standard tire pattern; and judging whether the second three-dimensional stereo image is consistent with the three-dimensional stereo image of the standard tire pattern, and if not, comparing the second three-dimensional stereo image with the three-dimensional stereo image of the standard tire pattern to further obtain the flatness and the defect degree of the tire pattern of the second wheel to be tested.
And judging whether the tire patterns of all the wheels to be detected are consistent or not by comparing the three-dimensional stereo images of all the wheels to be detected, so as to realize the consistency judgment of the tire patterns of the vehicle.
The set rolling time is determined according to the radius of the first wheel to be measured, the radius of the first roller 21 and the rotating speed of the motor 1.
The positioning of the first wheel to be measured and the second wheel to be measured on the same shaft to the lifting device 3 specifically includes: and positioning the first wheel to be measured and the second wheel to be measured through the correlation photoelectric switch 5.
The following provides a specific example to further illustrate the scheme of the present invention:
and S1, positioning the wheels by the photoelectric switch 5, and prompting the driver to stop by the prompting device.
S2, after the vehicle is successfully positioned, the lifting device 3 descends, the first wheel to be tested is pressed on the first roller 21 and the third roller 23, the second wheel to be tested is pressed on the second roller 22 and the fourth roller 24, and the driver is prompted to release the brake.
S3, the motor 1 drives the first roller 21 and the second roller 22 to rotate, the synchronous belt 4 drives the third roller 23 and the fourth roller 24 to rotate, and the coaxial first wheel to be tested and the coaxial second wheel to be tested are driven to roll.
S4, a two-dimensional laser scanner device passes through the light transmission device 6 to scan the tire patterns of the first wheel to be detected and the second wheel to be detected, the diameter of the tire of the first wheel to be detected is input before detection, the time for driving the roller to rotate by the motor 1 is automatically calculated, the full-size line scanning of the tire patterns of the first wheel to be detected and the second wheel to be detected is realized, the position coordinates of the surface of the tire are obtained by combining the rotating linear speed of the roller, the linear speed of the wheel and the rolling time, a three-dimensional stereogram of the tire patterns is established, the three-dimensional stereogram of the tire patterns comprises a first three-dimensional stereogram and a second three-dimensional stereogram, data analysis is carried out on the three-dimensional stereogram of the tire patterns, the pattern shape and the depth value of the.
And S5, after the tire patterns of the first wheel to be detected and the second wheel to be detected of one axle are scanned simultaneously, stopping the motor 1, stopping the rotation of the roller, lifting the lifting device 3, and continuously prompting the vehicle driver to guide the vehicle to scan the tire pattern of the next axle.
S6, establishing a license plate or vehicle type tire pattern library for pattern comparison when detecting the tire patterns of the wheels.
S7, when detecting the wheel of the all-time four-wheel drive vehicle, an auxiliary measuring device is needed to be configured, when one axle wheel is driven to rotate, the other axle wheel is arranged on the auxiliary detecting device, the auxiliary measuring device is in a locking state, and the roller of the motor 1 is in a free state. The auxiliary measuring device is in a locked state when other vehicle types except four-wheel drive vehicles are detected.
The invention relates to a tire pattern measuring method, which is used for carrying out full-automatic full-size measurement on vehicle tire patterns for a vehicle body, generating a three-dimensional stereo image of a wheel tire to be detected, analyzing the tire patterns at the shallowest position and the tire surface defects, comparing whether the tire patterns are consistent with those in factory inspection, and not needing to disassemble the tire. In addition, a three-dimensional stereo image of the wheel tire to be detected is generated, so that the tire pattern and the surface defects of the tire are conveniently identified, and the accuracy of detecting the tire pattern of the wheel is improved. In addition, the invention judges whether the tire patterns of all the wheels to be detected are consistent or not by comparing the three-dimensional stereo images of all the wheels to be detected, thereby realizing the consistency judgment of the tire patterns of the vehicle.
The tire pattern measuring method of the present invention is applied to a tire pattern measuring system, and as shown in fig. 8, the tire pattern measuring system of the present invention has a structure including:
the photoelectric positioning unit 206 is used for positioning the position of the vehicle, when the vehicle drives onto the lifting device 3 between the first roller 21 and the third roller 23, the photoelectric positioning unit 206 sends a positioning signal to the computer 203, and the computer 203 sends a prompt signal to the prompt unit 205 after receiving the positioning signal.
And the prompting unit 205 is used for prompting the vehicle driver to stop after receiving the prompting signal.
And the computer 203 is respectively connected with the photoelectric positioning unit 206, the prompting unit 205, the controller 204 and the switch 202, and sends a parking signal when the vehicle guide person parks the wheels on the same shaft on the lifting device 3.
The controller 204 is used for receiving the parking signal, controlling the lifting device 3 to descend, calculating the included angle between the two-dimensional laser scanning plane and the horizontal plane sent by the two-dimensional laser scanning device 7 according to the diameter of the input wheel tire, the computer 203 is used for controlling the opening and the included angle adjustment of the two-dimensional laser scanning device 7, controlling the opening and the stopping of the motor and storing a tire pattern library, respectively scanning the tires of the first wheel to be detected and the second wheel to be detected through the two-dimensional laser scanning device 7 according to the set rolling time to obtain a first three-dimensional stereo map of the tire pattern of the first wheel to be detected and a second three-dimensional stereo map of the tire pattern of the second wheel to be detected, and detecting the first wheel tyre pattern to be detected according to the first three-dimensional stereo image, and detecting the second wheel tyre pattern to be detected according to the second three-dimensional stereo image.
A switch 202 for communication connection between the computer 203 and the two-dimensional scanning apparatus 7.
And the two-dimensional laser scanning device 7 is used for scanning the surface of the tire and sending the scanning data to the computer 203.
Wherein the photoelectric positioning unit 206 is embodied as a correlation photoelectric switch 5.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (9)
1. A tire pattern measuring device, characterized in that, tire pattern measuring device includes:
the device comprises a motor, a first roller, a second roller, a third roller, a fourth roller, a two-dimensional laser scanning device, a lifting device and a controller;
the rotor of the motor is coaxially connected with the first roller, the first roller is coaxially connected with the second roller, and the central axis of the third roller is collinear with the central axis of the fourth roller; the central axis of the first roller and the central axis of the third roller are parallel to each other; the first roller and the second roller are arranged on one side of the lifting device, and the third roller and the fourth roller are arranged on the other side of the lifting device;
positioning a first wheel to be tested and a second wheel to be tested on the same shaft onto the lifting device, descending the lifting device to enable the first wheel to be tested to be pressed between the first roller and the third roller, and enabling the second wheel to be tested to be pressed between the second roller and the fourth roller;
the motor drives the first roller to rotate, and the first roller rotates to drive the first wheel to be tested and the second wheel to be tested to rotate;
when the first wheel to be tested and the second wheel to be tested rotate, the two-dimensional laser scanning device respectively scans the tires of the first wheel to be tested and the tires of the second wheel to be tested;
the controller is electrically connected with the two-dimensional laser scanning device and is used for respectively obtaining the tire patterns of the first wheel to be tested and the second wheel to be tested.
2. A device for measuring a tyre pattern as claimed in claim 1, characterized in that said first roller and said third roller are connected by a timing belt and said second roller and said fourth roller are connected by a timing belt.
3. The device for measuring tire tread as claimed in claim 1, wherein said two-dimensional laser scanning device comprises a first two-dimensional laser scanning device and a second two-dimensional laser scanning device, said first two-dimensional laser scanning device being disposed on the other side of said third drum near said lifting device, said second two-dimensional laser scanning device being disposed on the other side of said fourth drum near said lifting device;
determining an included angle between a two-dimensional laser surface emitted by the first two-dimensional laser scanning device and a horizontal plane through the distance between the first roller and the third roller, the height difference between the first two-dimensional laser scanning device and the first roller center, the distance between the middle point of the connecting line of the first roller center and the third roller center and the first two-dimensional laser scanning device, the radius of the first wheel to be detected and the radius of the first roller, so that the two-dimensional laser surface is vertically incident on a tire of the first wheel to be detected; the included angle between the two-dimensional laser surface emitted by the second two-dimensional laser scanning device and the horizontal plane is the same as the included angle between the two-dimensional laser surface emitted by the first two-dimensional laser scanning device and the horizontal plane.
4. The device for measuring a tire pattern according to claim 1, wherein said device for measuring a tire pattern further comprises an auxiliary measuring device, said auxiliary measuring device comprising a plurality of parallel rollers for supporting a third wheel to be measured and a fourth wheel to be measured of one axle to rotate when the first wheel to be measured and the second wheel to be measured of the other axle are positioned on said lifting device when the first wheel to be measured and the second wheel to be measured of the one axle are four-wheel drives.
5. The tire pattern measuring device of claim 1, further comprising a light transmission device, wherein the light transmission device is coplanar with a ground plane, the two-dimensional laser scanning device is disposed below the ground plane, and the laser light emitted by the two-dimensional laser scanning device is transmitted through the light transmission device to irradiate the first wheel under test and the second wheel under test.
6. A tire pattern measuring method applied to the tire pattern measuring apparatus according to any one of claims 1 to 3, the method comprising:
positioning the first wheel to be tested and the second wheel to be tested on the same shaft on the lifting device;
controlling the lifting device to descend to enable the first wheel to be tested to be pressed between the first roller and the third roller, and enable the second wheel to be tested to be pressed between the second roller and the fourth roller;
the motor drives the first wheel to be tested and the second wheel to be tested to rotate;
respectively scanning the tires of the first wheel to be detected and the second wheel to be detected through the two-dimensional laser scanning device according to the set rolling time to obtain a first three-dimensional stereo image of the tire pattern of the first wheel to be detected and a second three-dimensional stereo image of the tire pattern of the second wheel to be detected;
and detecting the first wheel tyre pattern to be detected according to the first three-dimensional stereo image, and detecting the second wheel tyre pattern to be detected according to the second three-dimensional stereo image.
7. A method for measuring a tyre pattern as claimed in claim 1, wherein said detecting said first wheel pattern to be measured from said first three-dimensional representation and said second wheel pattern to be measured from said second three-dimensional representation comprises:
comparing the first three-dimensional stereo image with the standard tire pattern of the type of the first wheel tire to be tested to obtain the flatness and the defect degree of the tire pattern of the first wheel tire to be tested;
and comparing the second three-dimensional stereo image with the standard tire pattern of the model of the second wheel tire to be tested to obtain the flatness and the defect degree of the second wheel tire pattern to be tested.
8. A method for measuring a tyre tread as claimed in claim 1, wherein said set rolling time is determined as a function of the radius of said first wheel to be measured, the radius of said first drum, and the speed of rotation of said motor.
9. A method as claimed in claim 1, wherein said positioning of said first wheel under test and said second wheel under test on the same axis on said lifting device comprises:
and positioning the first wheel to be tested and the second wheel to be tested through the correlation photoelectric switch.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011208767.5A CN112345275A (en) | 2020-11-03 | 2020-11-03 | Tire pattern measuring device and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011208767.5A CN112345275A (en) | 2020-11-03 | 2020-11-03 | Tire pattern measuring device and method |
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| CN112345275A true CN112345275A (en) | 2021-02-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114234834A (en) * | 2021-12-22 | 2022-03-25 | 上海三骏通讯设备技术有限公司 | Automobile tire pattern depth measuring device with static and dynamic detection functions |
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2020
- 2020-11-03 CN CN202011208767.5A patent/CN112345275A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114234834A (en) * | 2021-12-22 | 2022-03-25 | 上海三骏通讯设备技术有限公司 | Automobile tire pattern depth measuring device with static and dynamic detection functions |
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