Embedded sensor for in-situ monitoring of blade tip incursion
US9939247B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 5, 2016 |
| Grant date | Apr 10, 2018 |
| Priority date | — |
| Expiry date | Dec 5, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M15/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A wear monitoring system for measuring incursion depth into an abradable coating includes a layer of abradable coating including a depth. At least one measurement circuit includes a plurality of conductive leads disposed within the abradable coating. The conductive leads are spaced radially apart within a common radial plane corresponding to the depth of the abradable coating. A plurality of resistor elements corresponds with the plurality of conductive leads. Each of the plurality of resistor elements are in electrical communication with one of the plurality of conductive leads disposed within the common radial plane of the corresponding one of the plurality of conductive leads. An electrical characteristic of the circuit varies responsive to cutting of one or more of the plurality of conductive leads by a passing airfoil. A gas turbine engine and method are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.