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Title: System and method for online inspection of turbines using an optical tube with broadspectrum mirrors

Abstract

An optical inspection system for nondestructive internal visual inspection and non-contact infra-red (IR) temperature monitoring of an online, operating power generation turbine. The optical inspection system includes an optical tube having a viewing port, at least one reflective mirror or a mirror array having a reflectivity spectral range from 550 nm to 20 .mu.m, and capable of continuous operation at temperatures greater than 932 degrees Fahrenheit (500 degrees Celsius), and a transparent window with high transmission within the same spectral range mounted distal the viewing port. The same optical mirror array may be used to measure selectively surface temperature of metal turbine blades in the near IR range (approximately 1 .mu.m wavelength) and of thermal barrier coated turbine blades in the long IR range (approximately 10 .mu.m wavelength).

Inventors:
Issue Date:
Research Org.:
Siemens Energy, Inc., Orlando, FL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1233349
Patent Number(s):
9,217,852
Application Number:
13/597,919
Assignee:
Siemens Energy, Inc.
DOE Contract Number:  
FC26-05NT42644
Resource Type:
Patent
Resource Relation:
Patent File Date: 2012 Aug 29
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

Baleine, Erwan. System and method for online inspection of turbines using an optical tube with broadspectrum mirrors. United States: N. p., 2015. Web.
Baleine, Erwan. System and method for online inspection of turbines using an optical tube with broadspectrum mirrors. United States.
Baleine, Erwan. Tue . "System and method for online inspection of turbines using an optical tube with broadspectrum mirrors". United States. https://www.osti.gov/servlets/purl/1233349.
@article{osti_1233349,
title = {System and method for online inspection of turbines using an optical tube with broadspectrum mirrors},
author = {Baleine, Erwan},
abstractNote = {An optical inspection system for nondestructive internal visual inspection and non-contact infra-red (IR) temperature monitoring of an online, operating power generation turbine. The optical inspection system includes an optical tube having a viewing port, at least one reflective mirror or a mirror array having a reflectivity spectral range from 550 nm to 20 .mu.m, and capable of continuous operation at temperatures greater than 932 degrees Fahrenheit (500 degrees Celsius), and a transparent window with high transmission within the same spectral range mounted distal the viewing port. The same optical mirror array may be used to measure selectively surface temperature of metal turbine blades in the near IR range (approximately 1 .mu.m wavelength) and of thermal barrier coated turbine blades in the long IR range (approximately 10 .mu.m wavelength).},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2015},
month = {12}
}

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Works referenced in this record:

On the Preparation of Hard Oxide Films with Precisely Controlled Thickness on Evaporated Aluminum Mirrors*
journal, January 1949