Gii Acquisition, Lcc

John D Spalding

Michael G Nygaard

Gregory Martin Nygaard

George M Nygaard

Harold W Brunt, Jr

James W St Onge

Paul L Bourget

Kenneth S Kolodge

Joseph W Priskorn

Brett J Lee

John V McKowen

Eric M Walstra

A method and system for automatically inspecting parts and for automatically generating calibration data for use in inspecting parts are provided. The system includes a support for supporting a part to be inspected and/or a calibration device along a measurement axis. The system further includes a head apparatus including a plurality of radiation plane generators for directing an array of planes of radiation at the part and/or device so that the part and/or device occludes each of the planes of radiation to create a corresponding array of unobstructed planar portions of the planes of radiation. Each of the unobstructed planar portions contains an amount of radiation which is representative of a respective geometric dimension of the part and/or device. The head apparatus further includes a plurality of radiation plane receivers or cameras such as line scan cameras. Each of the cameras measures the amount of radiation present in an adjacent pair of unobstructed planar portions created from the same plane of radiation to obtain at least one measurement signal. The system still further includes a stage subsystem including a stage movable along a stage axis substantially parallel to the measurement axis and coupled to the head apparatus to move therewith for translating the head apparatus relative to the part and/or device along the stage axis so that the planes of radiation scan the part and/or device supported by the support substantially perpendicular to the stage and measurement axes. The system may further include one or more mechanisms for reducing radiation cross talk between neighboring cameras.

Method and system for automatically inspecting parts and for automatically generating calibration data for use in inspecting parts

A calibration device for use in an optical, part measuring system is provided. The device has a central axis and a plurality of regions which are rotationally symmetric about the axis. The device includes a series of step-shaped portions defining a multi-step region having a plurality of step edges. A profile of the multi-step region contains information for calibrating the system. The device further includes a plurality of cylindrically-shaped portions spaced apart along the axis and defining constant diameter regions containing information for calibrating the system. The device still further includes a frustum-shaped portion defining a pair of spaced, slope edge regions and a sloped region having boundaries marked by the pair of slope edge regions. The frustum-shaped portion has first and second diameters at its boundaries which define a range of diameters of parts capable of being measured in the system. A profile of the slope edge regions and the sloped region contains information for calibrating the system.

Calibration device for use in an optical part measuring system

An optical method and system for generating calibration data are provided. The calibration data is for use in calibrating a part inspection system. The method includes supporting a calibration device having a central axis and a plurality of regions which are rotationally symmetric about the axis. The method further includes scanning the device with an array of spaced planes of radiation so that the device occludes each of the planes of radiation at spaced locations along the central axis to create a corresponding array of unobstructed planar portions of the planes of radiation. Each of the unobstructed planar portions contains an amount of radiation which is representative of a respective geometric dimension of the device. The method still further includes measuring the amount of radiation present in each of the unobstructed planar portions to obtain measurement signals. The method includes processing the measurement signals to obtain calibration data for calibrating the system. The calibration data is capable of converting raw data to calibrated data.

Optical method and system for generating calibration data for use in calibrating a part inspection system

A method for precisely measuring position of a part to be inspected at a part inspection station is provided. The method includes positioning a part having a part axis relative to a measurement axis at the part inspection station and scanning the positioned part with an array of planes of radiation so that the part occludes each of the planes of radiation over a measurement interval of the part to create a corresponding array of unobstructed planar portions of the planes of radiation. Each of the unobstructed planar portions contains an amount of radiation which is representative of a respective geometric dimension of the part. The method also includes measuring the amount of radiation present in each of the unobstructed planar portions to obtain measurement signals and processing the measurement signals to obtain a geometric measurement between the axes at the measurement interval. The geometric measurement may be a distance between the axes or angle between the axes. If the geometric measurement is outside an acceptable range of geometric values, the method may further include repositioning the part until the geometric measurement between the axes at the measurement interval is within the acceptable range of geometric values.

Method for precisely measuring position of a part to be inspected at a part inspection station

A method and system for optically inspecting parts are provided. The method includes the step of supporting a part along a measurement axis. The method includes scanning the part with an array of spaced planes of radiation so that the part occludes each of the planes of radiation at spaced locations along the axis to create a corresponding array of unobstructed planar portions of the planes of radiation. Each of the unobstructed planar portions contains an amount of radiation which is representative of a respective geometric dimension of the part. The method still further includes measuring the amount of radiation present in each of the unobstructed planar portions to obtain measurement signals. The method includes processing the measurement signals to obtain raw data. The method further includes providing calibration data and processing the calibration data and the raw data to obtain measurements of the part.

Method and system for optically inspecting parts

A method and inspection head apparatus for optically measuring geometric dimensions of a part are provided. The method optically measures the geometric dimensions of a part having a part axis at an inspection station. The method includes directing an array of spaced planes of radiation at the part so that the part occludes each of the planes of radiation at spaced locations along the part axis to create a corresponding array of unobstructed planar portions of the planes of radiation. Each of the unobstructed planar portions contains an amount of radiation which is representative of a respective geometric dimension of the part. The method further includes measuring the amount of radiation present in each of the unobstructed planar portions.

Method and inspection head apparatus for optically measuring geometric dimensions of a part

A method for estimating thread parameters of a part which moves relative to a stage and a plurality of sensors which measure the amount of radiation contained in directed planar portions of radiation unobstructed by the part is provided. The amount of radiation is representative of a respective geometric dimension of the part. The method includes obtaining calibrated part data from an inspection region between position limits of the stage. The calibrated part data includes calibrated sensor data for each sensor of the system and its corresponding coordinate system. The method further includes processing the calibrated part data to obtain intermediate data. The method still further includes analyzing the intermediate data to produce estimates of the thread parameters of the part.

Method for estimating thread parameters of a part

Optical modules and a method of precisely assembling the modules are provided. The method includes the step of providing a set of optical components including a plurality of beam shaping components for converting at least one initial shape in cross section of a laser beam to at least one desired shape in cross section and an optical mount for supporting the set of optical components. The method further includes holding and locating the optical mount relative to a reference axis. The method still further includes holding the optical components in position relative to the optical mount during the step of holding and locating wherein the positions of the beam shaping components are initial positions. The method includes directing a laser beam having the at least one initial shape at the set of optical components during the step of holding the optical components. The method further includes adjusting the initial positions of the beam shaping components to obtain final positions of the beam shaping components relative to the optical mount during the step of directing until the laser beam has the at least one desired shape.

Optical modules and method of precisely assembling same

A method and system are provided for inspecting manufactured parts such as cartridges and cartridge cases and sorting the inspected parts. The system includes an illumination assembly for evenly illuminating a plurality of annular, exterior side surfaces of a part when the part is located in a circumference vision station with rings of strobed radiation to generate corresponding reflected radiation signals. A plurality of imaging detectors in the form of CCD cameras are located at the vision station to generate a plurality of side images. The system further includes at least one side image processor for processing the side images of each part to identify parts having an unacceptable defect. The system further includes a mechanism for directing parts identified as having an unacceptable defect to a defective part area and directing parts not identified as having an unacceptable defect to an acceptable part area.

Growing community of inventors

Ann Arbor, MI, United States of America

John D Spalding