Abstract
In recent years, advanced transport system such as high speed rail ways in the town and expressways connecting among big towns strongly requires to install the various sensors in particular velocity and acceleration sensors on their ways to govern and monitor the flow of traffic stream.
Up to now, it is possible to use various types of velocity and acceleration sensors. We have employed two typical sensors in this paper. One is a fixed type to the way and is possible to measure the exact speed as well as acceleration vectors. The other is a removable type to any location and is available to measure the instantaneous speed as well as acceleration vectors. The fixed type is a magnetic sensor, which equips the sensing or picking up coils, and has reasonable tough property to the mechanical and environmental conditions, but does not have high sensibility at low speed. The other is a CCD camera, which makes it possible to measure any low speed but is difficult to measure high speed over the frame rate speed limitation.
To visualize the speed and acceleration vectors under any conditions, we propose a hybrid measuring system combining both magnetic and CCD image sensors. Initial experiments demonstrate the usefulness of our system.
