Method and apparatus for determining length of pipe utilizing so

Details Method and apparatus for determining length of pipe utilizing so Method and apparatus for determining length of pipe utilizing so

1988-05-31

1989-08-01

Levy, Stewart J.

Measuring and testing

Vibration

By mechanical waves

367903, G01N 2904

Patent

active

048524077

ABSTRACT:
A method and an apparatus for determining a length of a pipe utilizing sound waves, which comprise: transmitting sound waves having a prescribed frequency and a prescribed transmission intensity toward the interior of a pipe at one end thereof by an oscillator; receiving the thus transmitted sound waves at the other end of the pipe by a receiver; measuring a propagation time required for the sound waves to pass through the air in the pipe from the one end to the other end thereof by a clock; and determining a length of the pipe by a length calculator on the basis of a predetermined propagation velocity of the sound waves in the air in the pipe and the thus measured propagation time of the sound waves.

REFERENCES:
patent: 4234942 (1980-11-01), Prause et al.
patent: 4241430 (1980-12-01), Kayem et al.
patent: 4494224 (1985-01-01), Morrell et al.
patent: 4584676 (1986-04-01), Newman

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