This paper describes a development of system for analyzing the external forces acting on a dummy. During frontal crash testing, various external forces act on a dummy. The dummy injury is caused by these forces. The dummy injury will be reduced by minimizing the external forces. If the external forces acting on dummy can be measured, the cause of dummy injury will be determined, which will be led to the way to reduce the dummy injury. For this reason, it is very important to measure them. However, in the past it was very difficult to measure them. In order to measure them, the following were developed:
The system was developed for the Hybrid III anthropomorphic test dummy. Using the Toyota-developed system, the followings could be obtained; external forces acting on head, chest and pelvis, and influences of these forces on the dummy injury. As a result, the developed system has become one of the most useful tools for developing the safer restraint system at Toyota.