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Method for measuring tyre size

A measurement method and tire technology, applied in the field of rubber machinery, can solve the problems of inaccurate image effect, inaccurate measurement, loss of detection significance, etc., and achieve the effect of improving positioning and image quality, and accurate measurement data

Inactive Publication Date: 2011-11-23
MESNAC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Inaccurate measurement of tire inner and outer diameter data will lead to wrong positioning of the laser probe, resulting in inaccurate image effects and loss of detection significance

Method used

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  • Method for measuring tyre size
  • Method for measuring tyre size

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1, such as figure 1 As shown, the tire specification measurement method applied to the laser speckle inspection equipment 6 measures the inside and outside of the tire 7 by establishing a corresponding linear relationship between the advancing distance of the conveyed tire 7 and the number of pulses actually measured by the rotary encoder 1. Radius value.

[0027] Simultaneously, also realize a kind of correction method of checking whether the tire 7 placed on the conveyer belt 5 has deviation.

[0028] When performing specification measurement, it is necessary to ensure that the tire 7 will not be displaced or slipped relative to the conveyor belt 5 during the entire conveying process, that is, the tire 7 and the conveyor belt 5 are required to remain relatively stationary to ensure that the rotary encoder 1 actually measures Accurate pulse value improves measurement accuracy.

[0029] Above the entrance of the laser speckle inspection device 6, three photoel...

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Abstract

The invention relates to a method for measuring tyre size, which is applied to laser speckle inspection equipment. The inside radius and the outside radius of a tyre are measured by establishing the corresponding linear relation between the advance distance of the tyre and the pulse number of a rotary encoder and using a photoelectric sensor and an encoder so as to increase the positioning accuracy of a laser probe, the light exposure homogeneity and the picture quality. The optoelectronic switch state change caused in the advance process of the tyre to be measured is measured by adopting a high-speed counter of a PLC system to measure and calculate the outside radius of the tyre: R=d*PR and the inside radius of the tyre: r=d*Pr, wherein d is the tyre advance linear distance which corresponds to each pair of adjacent pulses, d=pi*D / N, D is the delivery shaft diameter, N is the resolution ratio when the rotary encoder rotates per turn, PR is the accumulative pulse number generated by that outer ring edge (outside radius R) of the tyre triggers the optoelectronic switch, and Pr is the accumulative pulse number generated by that the inner ring edge (inside radius r) triggers the optoelectronic switch.

Description

technical field [0001] The invention relates to a tire specification measurement method applied to laser speckle inspection equipment, which belongs to the field of rubber machinery. Background technique [0002] In the manufacturing process of motor vehicle tires, in order to improve the production quality and ensure the safe operation of tires, a series of online inspection items are required. For example, the principle of laser speckle imaging inspection is used to conduct non-destructive inspection on the inner layer of the tire by emitting laser rays to the tire surface, and the signal of varying strength generated by the laser passing through the tire is fed back to the CCD camera for imaging to verify whether the tire is inside. If there are performance defects such as air bubbles, the tires will be identified and graded according to the inspection results. [0003] When using laser speckle detection technology, it is necessary to determine the distance between the l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B7/12G01B7/13
Inventor 王孔茂李石磊赵巧俐张艾贞祁海波杨焕军
Owner MESNAC
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