Author:
Lin Yueh-Jaw,Mahabaleshwarkar Rahul,Massina Elena
Abstract
This paper
describes a newly developed algorithm for CAD-based dimensional inspection path
planning utilizing coordinate measuring machines (CMMs). The algorithm guarantees to
provide optimum collision-free inspection probe paths by using the topological
structure of the boundary representation (B-rep) solid CAD models of
the inspected parts. A concept of automatic generation of optimum
and collision free path in three dimensional space using available
CAD database is proposed. The algorithm is generic for generating
probe path over prismatic polyhedral parts. It serves as a
principal part of the inspection path planning system. It is
based on the modified ray tracing technique which uses a
B-Rep data from any geometric modeling systems. Between start point
and target point, an imaginary ray is established and if
an intersection with part is encountered, an optimal detour path
is created avoiding interference of the probe with the part.
The generated path consists of linear segments joining start point
and target point by various intermediate points. To locate these
intermediate points in the consideration space, topological and geometrical structures
of the part models are used at the time of
decision making. To examine and implement the algorithm, a user-friendly
application is developed employing AutoCAD Runtime Extension (ARX) development environment
with object oriented programming (OOP) techniques, running on a Windows
NT workstation. The effectiveness of the proposed algorithm is verified
by the results of the implementation demonstrating optimum collision-free dimensional
inspection path generation for four representative prismatic part models. All
in all, this work contributes to the knowledge-base formation of
automated dimensional inspection research area and paves a way for
the integration of CMMs into a CAD/CAM environment, thus automate
the process of design, manufacturing and quality assurance.
Publisher
Cambridge University Press (CUP)
Subject
Computer Science Applications,General Mathematics,Software,Control and Systems Engineering
Cited by
13 articles.
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