Information processing apparatus, information processing method, and non-transitory computer readable recording medium

Patent metadata

Field	Value
Publication number	US-10859376-B2
Application number	US-201715435924-A
Country	US
Kind code	B2
Filing date	Feb 17, 2017
Priority date	Feb 25, 2016
Publication date	Dec 8, 2020
Grant date	Dec 8, 2020

Abstract

Provided is an information processing apparatus including: an input unit into which shape data of a surface to be measured including a plurality of recesses is input; and a setting unit that detects each of the plurality of recesses on the basis of the input shape data and sets, for the detected recess, a region to be removed including the recess.

First claim

What is claimed is:

1. A measuring apparatus, comprising:
one or more probes configured to acquire shape data of a surface of a cylindrical physical object to be measured, the one or more probes being operably coupled to a rotational driver and a linear driver, the linear driver configured to move the one or more probes in an inward or outward radial direction with respect to a center position of the cylindrical physical object to be measured, the rotational driver and the linear driver configured to image an inner side wall surface of the cylindrical physical object to be measured while maintaining a constant radial distance from the center position of the cylindrical physical object to be measured, the surface of the cylindrical physical object to be measured including a plurality of recesses,
a processor, and
a memory storing thereon instructions, which when executed by the processor, causes the processor to perform operations including:
receiving the shape data of the surface to be measured including the plurality of recesses;
detecting each of the plurality of recesses on the basis of the received shape data; and
setting, for one or more detected recess of the plurality of recesses, a region to be removed including the recess,

wherein the surface to be measured including the plurality of recesses is the inner side wall of the cylindrical physical object.

2. The measuring apparatus according to claim 1 , wherein
the region to be removed is set on the basis of an area of the detected recess.

3. The measuring apparatus according to claim 2 , further comprising:
setting a reference graphic figure having an area approximately equal to the area of the detected recess, wherein
the region to be removed is further set on the basis of a dimension of the reference graphic figure.

4. The measuring apparatus according to claim 3 , further comprising:
setting, as the region to be removed, a region obtained by enlarging the recess on the basis of an amount of enlargement that is a difference between the dimension of the reference graphic figure and a multiplication value obtained by multiplying a predetermined enlargement ratio by the dimension of the reference graphic figure.

5. The measuring apparatus according to claim 3 , wherein
the reference graphic figure is a circle having an area approximately equal to the area of the detected recess, and
the dimension is a diameter of the circle.

6. The measuring apparatus according to claim 3 , wherein
the reference graphic figure is a rectangle having a width approximately equal to a width of the recess, and
the dimension is a width dimension of the rectangle.

7. The measuring apparatus according to claim 2 , wherein
the region to be removed is set such that a multiplication value obtained by multiplying a predetermined enlargement ratio by the area of the detected recess is approximately equal to an area of the region to be removed.

8. The measuring apparatus according to claim 1 , further comprising:
setting a reference height to the shape data of the surface to be measured; and
detecting, as the recess, a portion whose height is smaller than the reference height by a predetermined threshold or more.

9. The measuring apparatus according to claim 8 , further comprising:
developing the input shape data into a plane;
setting the reference height to the developed shape data; and
detecting the recess.

10. The measuring apparatus according to claim 8 , wherein
the reference height is a mean height of the surface to be measured, which is calculated on the basis of the shape data.

11. The measuring apparatus according to claim 1 , further comprising:
causing the one or more probes to measure a surface roughness of a region excluding the set region to be removed.

12. A measuring method, comprising:
by a computer, acquiring shape data of a surface of a cylindrical physical object to be measured by one or more probes, the one or more probes being operably coupled to a rotational driver and a linear driver, the linear driver configured to move the one or more probes in an inward or outward radial direction with respect to a center position of the cylindrical physical object to be measured, the rotational driver and the linear driver configured to image an inner side wall surface of the cylindrical physical object to be measured while maintaining a constant radial distance from the center position of the cylindrical physical object to be measured, the surface of the cylindrical physical object including a plurality of recesses;
detecting each of the plurality of recesses on the basis of the acquired shape data; and
setting, for the detected recess, a region to be removed including the recess,
wherein the surface to be measured including the plurality of recesses is the inner side wall of the cylindrical physical object.

13. A non-transitory computer readable recording medium that records a program that causes a processor to perform operations including:
acquiring shape data of a surface of a cylindrical physical object to be measured by one or more probes, the one or more probes being operably coupled to a rotational driver and a linear driver, the linear driver configured to move the one or more probes in an inward or outward radial direction with respect to a center position of the cylindrical physical object to be measured, the rotational driver and the linear driver configured to image an inner side wall surface of the cylindrical physical object to be measured while maintaining a constant radial distance from the center position of the cylindrical physical object to be measured, the surface of the cylindrical physical object including a plurality of recesses;
detecting each of the plurality of recesses on the basis of the acquired shape data; and
setting, for the detected recess, a region to be removed including the recess,
wherein the surface to be measured including the plurality of recesses is the inner side wall of the cylindrical physical object.

14. A measuring apparatus comprising:
one or more probes configured to acquire shape data of a surface of a cylindrical physical object to be measured, the one or more probes being operably coupled to a rotational driver and a linear driver, the linear driver configured to move the one or more probes in an inward or outward radial direction with respect to a center position of the cylindrical physical object to be measured, the rotational driver and the linear driver configured to image an inner side wall surface of the cylindrical physical object to be measured while maintaining a constant radial distance from the center position of the cylindrical physical object to be measured, the surface of the cylindrical physical object to be measured including a plurality of recesses,
a processor, and
a memory storing thereon instructions, which when executed by the processor, causes the processor to perform operations including:
receiving the shape data of the surface to be measured including the plurality of recesses;
detecting each of the plurality of recesses on the basis of the received shape data;
setting, for one or more detected recess of the plurality of recesses, a region to be removed including the recess;
setting a reference height to the shape data of the surface to be measured; and
detecting, as the recess, a portion whose height is smaller than the reference height by a predetermined threshold or more,

wherein the surface to be measured including the plurality of recesses is the inner side wall of the cylindrical physical object and includes a plurality of pits.

Assignees

• Mitutoyo Corp

Inventors

• Kudo Yuji

Classifications

• G01B11/303 Primary

  using photoelectric detection means · CPC title

• G01B5/061

  height gauges · CPC title

• G01B11/12

  internal diameters · CPC title

• G01B21/04

  by measuring coordinates of points · CPC title

• G01B11/2441 Primary

  using interferometry · CPC title