Standard device for geometric quantity measurement and calibration

A technology of geometric quantities and standard devices, which is applied in the field of standard devices for measurement and calibration of geometric quantities, can solve problems such as lack of unanimous approval, and achieve the effects of wide applicability, improved accuracy, and simple structure

Pending Publication Date: 2021-02-23
苏州市计量测试研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no unanimously recognized method for the calibration of industrial CT geometric measurement errors at home and abroad.

Method used

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  • Standard device for geometric quantity measurement and calibration
  • Standard device for geometric quantity measurement and calibration

Examples

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Embodiment 1

[0030] The first embodiment provides a standard device for measuring and calibrating geometric quantities, such as figure 1 As shown, the device includes: a base 1 and at least one standard ball 2, the base 1 includes a first fixed plate 11, a second fixed plate 12, a third fixed plate 13 and a fourth fixed plate 1, the first fixed plate 1 The fixed plate 11, the second fixed plate 12, the third fixed plate 13 and the fourth fixed plate 14 form a trapezoidal structure, and a hollow space is provided inside the trapezoidal structure, and a hollow structure is adopted to avoid excessive thickness of the base plate As a result, the X-rays of low-power CT cannot penetrate the sample normally, which affects the imaging effect;

[0031] The first fixing plate 11, the second fixing plate 12 and the third fixing plate 13 are all provided with at least one boss, and the bosses are in one-to-one correspondence with the standard balls 2, and each of the bosses A blind hole is arranged o...

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Abstract

The invention relates to the technical field of size measurement, in particular to a standard device for geometric quantity measurement and calibration. The device comprises a base and at least one standard ball, and is characterized in that the base comprises a first fixing plate, a second fixing plate, a third fixing plate and a fourth fixing plate; the first fixing plate, the second fixing plate, the third fixing plate and the fourth fixing plate form a trapezoidal structure, and a hollow space is formed in the trapezoidal structure; each of the first fixing plate, the second fixing plate and the third fixing plate is provided with at least one boss, the bosses correspond to the standard balls in a one-to-one mode, each boss is provided with a blind hole, and the standard balls are arranged in the blind holes. According to the invention, a hollow trapezoidal structure can be adopted, so that the first fixing plate, the second fixing plate and the third fixing plate form spatial staggering and height difference, the imaging effect and the calibration stability of the calibration device are improved, measurement errors of geometric quantities of different sizes are counted, and the applicability is wide.

Description

technical field [0001] The invention relates to the technical field of dimension measurement, in particular to a standard device for measuring and calibrating geometric quantities. Background technique [0002] In recent years, industrial CT has combined the most advanced X-ray scanning technology with CT technology by virtue of computerized tomography technology, and with advanced measurement and analysis software, it can generate two-dimensional tomographic images or three-dimensional images without destroying the structure of the detected object. It can clearly, accurately and intuitively display the internal structure, material composition and defect status of the detected object. It has demonstrated excellent accuracy, versatility and professionalism in non-destructive testing technology and dimensional measurement technology, and has become an effective means to solve complex and difficult quality problems. It is suitable for testing tasks of most materials and sizes, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B15/00
CPCG01B15/00G01B21/042
Inventor 刘娟黄红平王云祥吴建平
Owner 苏州市计量测试研究所
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