Method and apparatus for determining position of a moving object in a tank

摘要

A method and apparatus for determining position of a vehicle in a tank of fluid. At least one transducer is disposed on the vehicle and a plurality of transducers are disposed on the outside wall of the tank. The transducers are arranged in a substantially common plane. The travel time of energy can be measured between any two of the transducers. Accordingly, the velocity profile of the liquid can be determined based on travel times measured between the transducers on the tank and position can be determined based on travel times measured between the transducers on the vehicle and the transducers on the tank.