Abstract
To reduce the head damage of the infant in a traffic accident, the international safety level claims some shape conditions of the interior part of the automobile. This level provides that curvature of the shape that touches a sphere with Φ165 must be larger than R3.2. Since the designer of interior parts is spending enormous costs for detecting possible dangerous shape, reduction of the verification cost is strongly requested. In this report, we represent a simple and fast algorithm for detecting the possible dangerous shape.
