Proximity sensor

Details Proximity sensor Proximity sensor

2007-05-08

2007-05-08

Hofsass, Jeffery (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

C324S623000, C324S637000

Reexamination Certificate

active

10869170

ABSTRACT:
A proximity sensor includes an antenna having a resonant frequency selected to correspond to a resonant frequency associated with a selected dimension of an item of interest. In one example, the antenna is selected to have a resonant frequency corresponding to a resonant frequency associated with the width of a turbine blade. The amount of electromagnetic coupling between the item of interest and the antenna provides an indication of the proximity or distance between them. Several embodiments for incorporating such a structure into a gas turbine air seal are disclosed.

REFERENCES:
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patent: 5818242 (1998-10-01), Grzybowski et al.
patent: 6273671 (2001-08-01), Ress, Jr.
patent: 6949922 (2005-09-01), Twerdochlib et al.
patent: 2005/0088171 (2005-04-01), Gualtieri

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