Nippon Steel Sumitomo Metal Corporation

Nippon Steel Corporation

Tomohiro Kuroiwa

Yusuke Konno

Nobuhiro Furuya

Atsuhiro Hibi

Toshio Akagi

Akihito Nakazaki

[Object] To measure the surface height of a rigid body to be measured more accurately even if any one of three types of disturbance of translation in the height direction, rotation around the longitudinal-direction axis, and rotation around the width-direction axis has occurred during conveyance. [Solution] A shape measurement apparatus according to the present invention uses a shape-measuring light-section line that is a light-section line extending in the width direction of a rigid body to be measured and is used to calculate the surface shape of the rigid body to be measured, a first correcting light-section line that is parallel to the longitudinal direction of the rigid body to be measured and crosses the shape-measuring light-section line, and is used to correct the effect of disturbance acting on the rigid body to be measured, and a second correcting light-section line that is parallel to the longitudinal direction of the rigid body to be measured, crosses the shape-measuring light-section line, and exists in a width-direction position of the rigid body to be measured different from the first correcting light-section line. On the basis of the two kinds of correcting light-section lines, the magnitude of disturbance is estimated at the intersection points of the shape-measuring light-section line and the correcting light-section lines; and thereby shape data obtained from the shape-measuring light-section line are corrected.

Shape measurement apparatus and shape measurement method

[Object] To provide a shape inspection method, a shape inspection apparatus, and a program capable of adjusting the brightness and the thickness of a light-section line in a light-section image more simply and objectively. [Solution] A shape inspection method according to the present invention includes: a light-section image generation step in which linear laser light is applied to an object surface from a laser light source and a light-section line based on the laser light on the object surface is imaged by an imaging apparatus, and thereby a light-section image that is a captured image used for a light-section method is generated; an indicator value calculation step in which a thickness indicator value indicating a thickness of the light-section line and a brightness indicator value indicating a brightness of the light-section line in the light-section image are calculated; a setting changing step in which setting of at least one of the laser light source and the imaging apparatus is changed so that each of the calculated thickness indicator value and the calculated brightness indicator value is within a prescribed range uniquely set in advance; and a shape inspection step in which image processing is performed on the light-section image after each of the thickness indicator value and the brightness indicator value is brought within the prescribed range, and thereby a shape of the object surface is inspected.

Shape inspection method, shape inspection apparatus, and program

[Object] To provide a shape measurement apparatus that is capable of measuring the amount of warpage in the width direction of a strip-shaped body with higher sensitivity. [Solution] Provided is a shape measurement apparatus including: a light source configured to irradiate a surface of a moving strip-shaped body with linear light at a prescribed angle of incidence; a screen configured such that reflected light of the linear light on the surface of the strip-shaped body is projected on the screen; an imaging unit configured to image the reflected light of the linear light projected on the screen; and an arithmetic processing unit configured to acquire the amount of warpage in a width direction of the strip-shaped body on the basis of a line length of the reflected light of the linear light imaged by the imaging unit.

Growing community of inventors

Tokyo, Japan

Tomohiro Kuroiwa