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Laser vision on-line automatic measuring method for tire multiple geometrical parameters

An automatic measurement and geometric parameter technology, applied in the field of measurement, can solve the problems of high equipment cost, limited measurement range, and inability to measure multiple geometric parameters of tires at the same time, and achieve a high degree of automation, large measurement range and simple structure. Effect

Inactive Publication Date: 2006-06-14
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the existing photoelectric measurement methods, each set of equipment can only measure one parameter of the tire, and cannot measure multiple geometric parameters of the tire at the same time. Therefore, to measure multiple geometric parameters of the tire, multiple sets of equipment are required, and the equipment cost is high. And the measuring range is limited

Method used

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  • Laser vision on-line automatic measuring method for tire multiple geometrical parameters
  • Laser vision on-line automatic measuring method for tire multiple geometrical parameters
  • Laser vision on-line automatic measuring method for tire multiple geometrical parameters

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Embodiment

[0084] The actual design of the laser vision sensor is as follows: Figure 8 shown. Figure 8 Among them, 21 is a sensor power line, output signal interface terminal, 22 is a CCD camera window, 23 is a sensor installation mechanism, 24 is a sensor housing, and 25 is a laser projector window.

[0085] Following the steps described above, use the Figure 4 The tire model shown, Figure 5 The planar calibration target shown and the Image 6 The three-dimensional calibration target, CCD camera, laser vision sensor and measurement system shown are calibrated. The obtained measurement system parameters are:

[0086] Camera internal parameters: A = 952.596 0 393.391 0 949.901 309.320 ...

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Abstract

The invention belongs to the technical field of measurement and provides an online automatic non-contact measurement method for multiple geometric parameters of tires. The invention projects a laser light plane to the tire, uses a CCD camera to obtain images of deformation characteristic lines, and calculates multiple geometric dimension parameters of the tire according to the three-dimensional information of key characteristic points of the tire surface contour. The invention realizes single-sensor measurement of multiple geometric parameters of the tire at one time; the measurement sensor has simple structure, low cost, high measurement accuracy, high measurement efficiency, and large measurement range, and can measure tires of different specifications; the measurement equipment has a high degree of automation, and the measurement The process is simple.

Description

technical field [0001] The invention belongs to the technical field of measurement and provides an online automatic non-contact measurement method for multiple geometric parameters of tires. Background technique [0002] The dynamic balance of the tire is an important parameter for assessing the quality of the tire. When the dynamic balance of the tire is not good, the centrifugal force in a certain direction is too large or too small, which will affect the quality of the tire. In serious cases, it will easily cause a tire blowout during operation after it is installed on a car, resulting in a safety accident. my country's tire industry is in the period of product upgrading, and the development of high-performance tires has just started. It is urgent to strengthen the factory inspection of products and control the unbalance of tires. It is necessary to expand the inspection object from supporting specifications to other specifications, from supporting products to all produc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/24G01B11/00G01M17/02G01B21/00G06T1/00H04N5/225
Inventor 周富强张广军
Owner BEIHANG UNIV