System for acoustically measuring the length of a pipe

Details System for acoustically measuring the length of a pipe System for acoustically measuring the length of a pipe

1994-01-31

1995-07-11

Lobo, Ian J.

Communications, electrical: acoustic wave systems and devices

Echo systems

Distance or direction finding

367902, G01S 1114, G01N 2922

Patent

active

054327520

ABSTRACT:
A calibration pipe having a predetermined length is connected to an end of a pipe to be measured. A sound emitter and a sound receiver are connected to a base end of the calibration pipe. The sound emitter emits a sound into the calibration pipe and the pipe to be measured, and the sound receiver receives a sound reflected from a discontinuous portion of the pipe. A calculator is provided for calculating a period of time from emitting of the sound to receiving of the reflected sound. The length of the pipe is calculated based on speed of the sound in the calibration pipe.

REFERENCES:
patent: 4234942 (1980-11-01), Prause et al.
patent: 4494224 (1985-01-01), Morrell et al.
patent: 4584676 (1986-04-01), Newman
patent: 4930350 (1990-06-01), Bode et al.
patent: 4935884 (1990-06-01), Hajicek
patent: 5195059 (1993-03-01), Hiroshi et al.

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