Hydraulic proximity probe

Details Hydraulic proximity probe Hydraulic proximity probe

G - Physics

01

B

340/124

G01B 7/14 (2006.01) G01B 13/12 (2006.01)

Patent

CA 1212439

HYDRAULIC PROXIMITY PROBE ABSTRACT: An hydraulic proximity probe arrangement for determining the spacing of the surface (26) of a rotat- ing body (10) from another fixed body as it rotates in a fluid medium. The body is provided with a plurality of circumferentially and equally spaced surface irregular ities (12) of like size and shape, such as indentations or projections, and at least a pair of probes (18,20) are circumferentially spaced around the body, each being axially spaced an equal distance from the body's sur- faces when at rest. The probes pick-up pulsations in the fluid medium caused by the rotating body, the amplitudes of which are indicative of the spacing of the surface of the rotating body from the end of the probes. These pulsations are signalized (28,30) and the resul- tant signals are compared with calibrated deviation signals to provide data indicative of the spacing of the body's surface from a reference point during rotation of the body.

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