Visual distance display for automobile anti-collision system - used radar to simulates viewing perspective or variation in size with distance

摘要

The radar measures the distance between the automobile and the vehicle in front and controls a visual display in the line of sight of the driver. The display is designed to simulate the variations in perspective with increasing distance, or the reduction in apparent size of a vehicle further away. In the former case the display represents a perspective view of the road ahead with the preceeding vehicle designated at a given point on it in dependence on the measured distance. In the latter case the display uses a series of different size display figures (1,2,3), each representing an identical vehicle, fitting one inside the other, the size of the figure which is energised being selected in dependence on the measured distance. The display is designed to increase the driver's perception of the measured distance, for increasing safety.