High resolution acoustic pulse-echo ranging system

Details High resolution acoustic pulse-echo ranging system High resolution acoustic pulse-echo ranging system

1992-10-15

1993-11-09

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Echo systems

Distance or direction finding

367 98, 367100, 367900, G01S 1500

Patent

active

052609103

ABSTRACT:
The uncertainty inherent in high-resolution acoustic pulse-echo distance measuring systems which depend on threshold detection is overcome by transmitting a multi-cycle shot of acoustic energy having a sharply peaked amplitude profile, and locating the peak amplitude of a received echo. The peaked amplitude is achieved by timing the duration of energization of a transducer producing the shot so that energization is terminated before the amplitude of oscillation of the transducer has reached a maximum. This produces a shot which has a definite largest cycle, which should in turn produce an echo having a definite largest cycle.

REFERENCES:
patent: 3562703 (1971-02-01), Grada
patent: 4000650 (1977-01-01), Snyder
patent: 4596144 (1986-06-01), Panton et al.
patent: 4850226 (1989-07-01), Allen et al.
patent: 5131271 (1992-07-01), Haynes et al.
"Donar: a computer processing system to extend ultrasonic pulse-echo testing", Lees et al, Ultrasonics, Jul. 1973.

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