There is provided a profile measuring apparatus, including: an irradiation section configured to irradiate a measurement light to a measurement area of the object; an imaging section configured to obtain an image of the measurement area; a table configured to place the object thereon; a coordinate calculation section configured to calculate a position of the measurement area based on an image detected by a detection section; and a positioning mechanism configured to drive and control a relative position of the imaging section and the table. The positioning mechanism calculates a relative position of the imaging section to the table, based on an information with respect to an edge line direction of a convex portion or an extending direction of a concave portion in the measurement area of the object having a repetitive concave-convex shape, to move at least one of the table and the imaging section.

The invention is directed to a method for measuring an internal thread of a workpiece with a coordinate measuring apparatus and a CCD or CMOS sensor. The sensor records at least two images of a section of the internal thread and the recording conditions for the two images are modified. The data from these two recorded images are used to establish the position, orientation, core diameter and/or the pitch of the internal thread. The invention is also directed to an arrangement for measuring an internal thread of a workpiece and includes a coordinate measuring apparatus and the CCD or CMOS sensor in accordance with the above method.

An inspection apparatus initially involves an illuminator for directing an illuminating light beam towards a hole having two extremities and an internal surface extending between the two extremities. The inspection apparatus also involves a lens assembly for imaging the internal surface of the hole into the flat image. The lens assembly has a cylindrical field of view as well as a cylindrical depth of view. The cylindrical depth of field extends at least between the two extremities of the hole. The inspection apparatus further involves an image capturing device for capturing the flat image, and an image processing unit for performing inspection of the flat image to thereby inspect the internal surface of the hole. More specifically, the internal surface of the hole between the two extremities thereof is substantially in-focus along the flat image.

This thread shape dimension measuring device includes an illumination unit, an imaging unit, a focal distance adjustment unit, a calibration value setting unit, and a control unit. The illumination unit selectively emits parallel light in two directions. The imaging unit selectively performs capturing of a first captured image and a second captured image. The focal distance adjustment unit adjusts a focusing position of the imaging unit by receiving an adjustment instruction from the control unit. The calibration value setting unit has a difference value between a focal distance of the second captured image from a focusing position to the imaging unit before the focusing position adjustment and a focal distance of the first captured image from a focusing position to the imaging unit. The control unit calculates the thread shape dimension on the basis of the captured first captured image and the second captured image.

An apparatus configured to measure at least one physical characteristic of a threaded surface (e.g., an internally threaded surface) of an object is provided. The apparatus uses optical triangulation to perform non-contact characterization of the threaded surface. The apparatus can be used to characterize various aspects of the threaded surface, including generating the measurements required to produce a longitudinal cross-sectional profile of the threaded surface.

A non-destructive and optical measurement automation system for web thickness of microdrills and method thereof can obtain the measuring data corresponding to a certain section to be measured of a microdrill by means of automated optical measurement. Specifically speaking, the said system and method measure the section to be measured via an optical measuring plane formed by a measuring light beam, and the included angle between the optical measuring plane and the central axis of the microdrill is practically consistent with the helix angle of the microdrill. The said system and method then analyze the measuring data via a computer device to obtain the outer diameter and the depths of helical flutes corresponding to the section to be measured. Finally, the said system and method calculate the web thickness of the said section to be measured according to the outer diameter and the depths of helical flutes.

An apparatus configured to measure at least one physical characteristic of a threaded surface (e.g., an internally threaded surface) of an object is provided. The apparatus uses optical triangulation to perform non-contact characterization of the threaded surface. The apparatus can be used to characterize various aspects of the threaded surface, including generating the measurements required to produce a longitudinal cross-sectional profile of the threaded surface.

The present invention provides a method for measuring an end portion shape of a threaded pipe or tube P, the method including: a thread axis detection step; a laser light positioning step; a laser light image capture step; and a shape calculation step. In the laser light positioning step, the light source 1 and the image capture device 2 are moved together so that: the optical axis LA of the light source is located so as to pass through a measurement point D (X1, Y1, Z1) on the thread axis A, the measurement point being located in the measurement target region within a plane NP including the thread axis; and the laser light L extends in a slit-like form within the plane.

A tap phase detection method includes: acquiring a relation between a rotation angle and an existence of a screw thread by measuring a position of the screw thread of a tap with a sensor from a direction intersecting with an axial direction of the tap while rotating the tap; and detecting a phase of the tap based on the acquired relation between the rotation angle and the existence of the screw thread.

A method and a device can be used for optically measuring a thread on an end of a metal pipe by at least one measuring head which is fastened to a manipulator. The measuring head is preferably freely positionable in relation to the metal pipe and has at least one optical measuring path for measuring the thread and at least one position detector. The method includes at least the following method steps: A) providing the metal pipe in a measurement position; B) determining the spatial position of a longitudinal axis of the metal pipe by means of the at least one position detector before and/or while the measuring head is positioned in a measurement position; C) aligning the measuring head parallel to the longitudinal axis of the metal pipe before and/or while the measuring head is positioned in the measurement position; and D) carrying out the optical thread measurement.