Methods and apparatus for indicating selected physical parameter

Details Methods and apparatus for indicating selected physical parameter Methods and apparatus for indicating selected physical parameter

1983-09-16

1985-06-11

Birmiel, Howard A.

Measuring and testing

Vibration

Resonance, frequency, or amplitude study

73 405A, 73586, 73592, G01N 2904

Patent

active

045220638

ABSTRACT:
A method of detecting inadequately supported sections or overloaded points in a pipeline including the steps of traversing the interior of the pipeline with an instrumentation pig, sequentially striking or vibrating the wall of the pipeline by means carried by the pig to introduce vibratory signals into the pipeline, receiving said signals from within the pipeline by listening to the sounds generated as a consequence of the striking of the interior wall, and detecting preselected characteristics of received sound which are indicative of unsupported sections or of points of load and stress concentration in the pipeline.

REFERENCES:
patent: 2617134 (1952-11-01), Barton, Jr.
patent: 3097523 (1963-07-01), Diamond et al.
patent: 3508433 (1970-04-01), Bustin
patent: 3580056 (1971-05-01), Warner
patent: 4400980 (1983-08-01), Lepert
patent: 4446734 (1984-05-01), Empson

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