Laser position indicator for valve stem

Details Laser position indicator for valve stem Laser position indicator for valve stem

G - Physics

01

S

G01S 17/88 (2006.01) F16K 37/00 (2006.01)

Patent

CA 2099113

2099113 9212373 PCTABS00014 The displacement of a valve stem (16) is measured during diagnostic testing by temporarily mounting a laser head (112) on the valve body (18) or yoke (20), for generating a source laser beam (118) that reflects from a target (120) that moves with the stem. The timing of the reflected beam (132) returning to the head (112) relative to the projection of the source beam, gives an indication of the displacement of the stem.

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