초록 ▼

An apparatus includes a blade clearance detection system. A probe is configured to communication detection frequencies from and gather reflected signals for the blade tip detection system. The probe has an end supported relative to the casing. A material provides a reference point. The blade tip cle

An apparatus includes a blade clearance detection system. A probe is configured to communication detection frequencies from and gather reflected signals for the blade tip detection system. The probe has an end supported relative to the casing. A material provides a reference point. The blade tip clearance detection system is configured to generate a first detection frequency configured to pass through the material to detect the position of a target structure, generate a second detection frequency configured to reflect from and detect the reference point, and determine a position of a surface approximate to the target structure based upon the reference point.

대표청구항 ▼

1. An apparatus comprising: a blade tip clearance detection system;a probe configured to communicate first and second detection frequencies from and gather reflected signals for the blade tip detection system, the probe having an end supported relative to a casing;material providing a reference poin

1. An apparatus comprising: a blade tip clearance detection system;a probe configured to communicate first and second detection frequencies from and gather reflected signals for the blade tip detection system, the probe having an end supported relative to a casing;material providing a reference point; andwherein the blade tip clearance detection system is configured to: generate the first detection frequency configured to pass through the material to detect the position of a target structure;generate the second detection frequency configured to reflect from the material and detect the reference point; anddetermine a position of a surface proximate to the target structure based upon the reference point. 2. The apparatus according to claim 1, wherein the blade tip detection system includes a controller and a frequency generator. 3. The apparatus according to claim 1, wherein the casing includes a blade outer air seal providing the surface. 4. The apparatus according to claim 3, wherein the target structure is a turbine blade including a blade tip. 5. The apparatus according to claim 4, wherein the surface position is determined by determining a clearance between the blade outer air seal and the blade tip. 6. The apparatus according to claim 1, wherein the material is transparent to the first detection frequency. 7. The apparatus according to claim 1, wherein the material includes a machined surface to provide a desired height that provides the reference point.