An Approach for Evaluating 3-D Workspace Using Photogrammetry and CAD Software

Abstract

Evaluation of workspace layout and design is a common task among ergonomists. It is desirable to find accurate and expedient means to generate the workspace in a virtual form, which allows the evaluation of various aspects of the human-workspace interface. The purpose of this practice-based paper is to introduce and evaluate a method, known as photogrammetry, which facilitates the recreation of workspaces in virtual three-dimensional (3-D) space. To demonstrate the utility and accuracy of this approach, a photogrammetry software was used to generate virtual 3-D models of ten popular agricultural tractors. Accuracy evaluation showed that photogrammetry is generally more useful for larger and more complicated objects, while smaller and simpler objects tend to yield less error. Furthermore, the paper shows examples on how these virtual 3-D mockups can be incorporated into Computer Aided Design (CAD) or ergonomic software in order to evaluate operator-cab interface issues such as reach, clearance and field of vision. This two-layered approach can be a very useful and powerful tool for ergonomists when designing and evaluating various human-workspace interfaces.