Patent ID: 6806824
Filing Date: 2004-10-19
Classification: G01F,G01S

Abstract:
A method for measuring the distance of an object, comprising:a) emitting a pulse-shaped signal from a transmitter (2) to the object; b) receiving an echo pulse (3; 21, 22) of the pulse-shaped signal; c) measuring a time difference between the transmission of the pulse-shaped signal and reception of the echo pulse (21, 22); d) measuring a phase difference between the transmitted pulse-shaped signal and the echo pulse (21, 22); e) determining a distance as the measured distance of the object, which distance is compatible with the measured time difference and the measured phase difference after taking into account the propagation speed of the signal; characterized in that the echo pulse (3; 21, 22) received in step b) is logarithmized, and that the steps d) and e) are performed on the logarithmized echo pulse (5; 21, 22).