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Calibration method

A calibration method and technology of calibration reference, applied in the field of calibration, can solve problems such as scale error and inability to measure with high precision, and achieve the effect of improving accuracy

Pending Publication Date: 2022-02-18
MITUTOYO CORP
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, since there is a scale error in the coordinate measuring device, there is a problem that when measuring the interval between a plurality of reference balls of the ball board using the coordinate measuring device, the interval cannot be measured with high precision

Method used

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Embodiment Construction

[0025]

[0026] This calibration method is a method for calibrating the interval between a plurality of objects to be measured in a reference instrument using a coordinate measuring device (ie, a coordinate measuring machine). The plurality of objects to be measured are, for example, a plurality of reference balls included in the bat or a plurality of openings included in the bat. The calibration method i) determines the scale error of a coordinate measuring device used to measure a plurality of objects to be measured, and ii) is based on the determined scale error of the coordinate measuring device and the difference between the plurality of objects to be measured measured by the coordinate measuring device to calibrate the interval between a plurality of objects to be measured included in the reference instrument. In this embodiment, as an example, a method for calibrating the interval between two reference balls among a plurality of reference balls included in the ball bo...

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Abstract

A calibration method includes the steps of placing a structure to be measured at a first position, measuring a first distance from a laser interferometer 16 to a reflector 15, and measuring first coordinates of a body to be measured 14, moving the structure to be measured to a second position, measuring a second distance from the laser interferometer to the reflector and measuring second coordinates of the structure to be measured with the coordinate measuring apparatus S, while the structure to be measured is at the second position, determining a scale error of the reference instrument P, mounting the reference instrument P, measuring the interval between objects to be measured A1 and A2, and calculating a calibration value of the interval between the objects to be measured.

Description

technical field [0001] The present invention relates to calibration methods. Background technique [0002] Coordinate measuring equipment is well known as a measuring device for measuring the size and geometry of an object to be measured. [0003] The coordinate measuring device is calibrated using a reference instrument such as a ball plate to maintain measurement accuracy (see, for example, Japanese Patent No. 4,584,029). Contents of the invention [0004] The problem to be solved by the invention [0005] A plurality of reference balls on the ball plate are arranged at predetermined intervals. It is conceivable to use coordinate measuring equipment to calibrate the spacing between reference spheres. However, since there is a scale error in the coordinate measuring device, there is a problem that when the coordinate measuring device is used to measure the distance between a plurality of reference balls of the cue ball, the distance cannot be measured with high precisi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/00G01B11/14
CPCG01B11/002G01B11/14G01B21/042G01B11/026G01B9/02072G01B9/02001
Inventor 奈良正之
Owner MITUTOYO CORP