Pipe measuring method and apparatus

Details Pipe measuring method and apparatus Pipe measuring method and apparatus

1982-07-16

1985-01-15

Farley, Richard A.

Communications, electrical: acoustic wave systems and devices

Transponders

367 99, 367108, 367115, 367902, 367910, G01S 1512

Patent

active

044942249

ABSTRACT:
Method and apparatus for determining the length of a tubular member such as a pipe are disclosed. A burst of acoustical pulses are emitted from a sending unit and are received by a reference acoustical transducer and by a slave acoustic transducer. The slave transducer emits a return pulse which is used to compute the duration of the sound propagation interval between the ends of the pipe. A phase angle compensation factor is computed by measuring the phase shift of the signal received by the reference transducer with respect to the signal emitted by the master transducer.

REFERENCES:
patent: 3076519 (1963-02-01), Alsabrook
patent: 3834233 (1974-09-01), Willis et al.
patent: 4210969 (1980-07-01), Massa
patent: 4241430 (1980-12-01), Kayem et al.
patent: 4254478 (1981-03-01), Dumas
Radio Shack Dictionary of Electronics, p. 28, Fourth Edition, 1974.

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