Patent ID: 6725076
Filing Date: 2004-04-20
Classification: A61B,G01P,G01S

Abstract:
An apparatus for measuring the velocity of a moving object or a collection of moving objects moving in a predetermined direction and at a predetermined distance, the apparatus comprising:a generator for generating excitation signals, an emitting transducer for transforming the excitation signals into wave energy and for emitting said wave energy in a predetermined direction of propagation towards the object or objects, a receiving transducer for receiving from said moving object or objects, signals generated by interaction with said wave energy emitted from said emitting transducer, said emitting transducer and said receiving transducer having respective sensitivities for selectively creating a plurality of focal points, which in combination define a focus line at the predetermined distance and extending in the predetermined direction of movement, and means for calculating a correction of signals received from the moving object or objects on the focus line, and for calculating, based on the correlation, the velocity of the moving object or objects in the direction of the focus line.