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Optical projection measurer for external diameter of large wheel diameter

An optical projection and measurement device technology, applied in the field of measurement, can solve problems such as large positioning error, long measurement optical path, and decreased measurement accuracy, and achieve the effects of less positioning error, good stability, and compact structure

Inactive Publication Date: 2007-08-08
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, when measuring the geometric rotary shape with a large wheel diameter, since the measuring device itself is required as a positioning reference, the system structure is huge and complex, not only the positioning error is too large, the measurement operation is inconvenient, and the measurement accuracy is reduced, but also the measurement optical path is long and the optical noise is low. High, the stability of the measuring device is also poor
Especially when measuring large wheel diameter and non-cylindrical geometry of revolution, its measurement effect is significantly reduced

Method used

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  • Optical projection measurer for external diameter of large wheel diameter
  • Optical projection measurer for external diameter of large wheel diameter
  • Optical projection measurer for external diameter of large wheel diameter

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Embodiment Construction

[0014] The optical projection measurement device with large wheel diameter and outer diameter of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0015] As shown in Figures 1 and 2, an optical projection measurement device for the outer diameter of a large wheel has a mechanical positioning assembly 7 that can be positioned above a section of the circular arc tread of the measured geometric revolving body 8, the mechanical positioning assembly 7 Any structural form in the prior art can be used, as long as it can determine the chord length L of the circular arc tread of the measured geometric revolving body 8 and the distance Ho from the chord to the reference plane of the mechanical positioning assembly 7 . The mechanical positioning assembly 7 is fixed with an optical measuring head for projecting the circular arc tread profile of the measured geometric revolving body 8 from the direction ...

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Abstract

The present invention discloses a large wheel diameter outside diameter optical projection measuring equipment. It includes a mechanical positioning component and an optical measuring head mounted on the mechanical positioning component. Said optical measuring head is composed of back projection laser source, beam expander lens, optical slit component, imaging lens component, CCD camera and signal control processing device. It is applicable to diameter measurement of geometric revaling body whose wheel diameter is greater than 500mm, specially it is applicable to diameter measurement of geometric revolving body whose thread width is greater than 80 mm.

Description

technical field [0001] The invention belongs to the technical field of measurement, and relates to a measuring device for calculating the diameter of a circle based on the chord height method, in particular to an optical projection measuring device for the outer diameter of a large wheel. Background technique [0002] As a powerful tool for measuring diameter by projection imaging, optical diameter measuring device has been widely used in geometric shape measurement research. In recent years, a lot of research on this technology by scientific and technical personnel has always been based on the method of directly measuring the diameter. In the article "Double Beam Laser Scanning Dimension Measurement System" {see "Semiconductor Optoelectronics" 1998, 19(5): 320~323}, a typical diameter projection imaging measurement method and device are proposed, which is characterized in that the measured The geometrical body of revolution is installed on the frame of the measuring equipm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/08
Inventor 卢红
Owner WUHAN UNIV OF TECH
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