Proximity sensor
US7215252B2 · kind B2 · utility
12Cited by
8References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 16, 2004 |
| Grant date | May 8, 2007 |
| Priority date | — |
| Expiry date | Oct 2, 2024 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01D17/20
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.