NASA SBIR 2003 Solicitation

FORM B - PROPOSAL SUMMARY


PROPOSAL NUMBER:03-A2.05-7649 (For NASA Use Only - Chron: 035358)
SUBTOPIC TITLE:Revolutionary Propulsion Research for Core Technologies
PROPOSAL TITLE:High Temperature, Through the Case Eddy Current Sensor for Blade Vibration Measurements

SMALL BUSINESS CONCERN (Firm Name, Mail Address, City/State/Zip, Phone)
Hood Technology Corp
1750 Country Club Rd
Hood River ,OR 97031 - 8636
(541) 387 - 2288

PRINCIPAL INVESTIGATOR/PROJECT MANAGER (Name, E-mail, Mail Address, City/State/Zip, Phone)
Andreas   von Flotow
andy@hoodtech.com
1750 Country Club Rd
Hood River ,OR  97031 -8636
(541) 387 - 2288
U.S. Citizen or Legal Resident: Yes

TECHNICAL ABSTRACT (LIMIT 200 WORDS)
Preliminary results have shown that low temperature eddy current sensors can provide excellent resolution for blade tip timing, and have the ability to see ?through the case? of an engine and measure blade passings, without having to drill into the case material or subject the sensor to the harsh environment of the gas flow. What is needed is a rugged, high resolution sensor that can be used for applications up to turbine temperatures, and that can easily overcome issues of velocity dependent calibration, low pass filtering through cases, varying case materials and thicknesses, high temperature, and limited standoff distances. Eddy current is the only technology that can provide the solution to these problems, and at the same time operate in dirty environments (oil, steam, etc.) This SBIR plans to develop an eddy current sensor technology that can be used at turbine temperatures, be mounted outside the engine case, work in hostile environments and provide Generation 4 resolution for Non-Intrusive Stress Measurements (NSMS) of turbine blades.

POTENTIAL NASA COMMERCIAL APPLICATIONS (LIMIT 150 WORDS)
NASA applications include the ability to test turbines and/or high pressure compressors at temperature for High Cycle Fatigue and other vibration anomalies, while potentially making measurements outside the gas path. Other applications include using the sensor in spin pit tests in the presence of oil, and also making accurate vibration measurements through a gear box, for helicopter applications.

POTENTIAL NON-NASA COMMERCIAL APPLICATIONS (LIMIT 150 WORDS)
Major applications are for commercial engine companies and government agencies involved in High Cycle Fatigue Testing, Low Cycle Fatigue testing, gearbox testing, and the development of high pressure compressors and turbines. The ability to see ?through the case? will be critical to many applications where direct access to blades are difficult or impossible.