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SURFACE ROUGHNESS AFFECTS BOTH THE SHAPE OF AN ULTRASONIC IMPULSE TRANSMITTED…

Award Information

Agency:
Department of Defense
Branch:
Army
Award ID:
4026
Program Year/Program:
1986 / SBIR
Agency Tracking Number:
4026
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Intercomp
Rt 3 Box 212 Stillwater, OK 74074
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 1986
Title: SURFACE ROUGHNESS AFFECTS BOTH THE SHAPE OF AN ULTRASONIC IMPULSE TRANSMITTED THROUGH AN INTERFACE AND ITS POWER SPECTRUM.
Agency / Branch: DOD / ARMY
Contract: N/A
Award Amount: $48,651.00
 

Abstract:

SURFACE ROUGHNESS AFFECTS BOTH THE SHAPE OF AN ULTRASONIC IMPULSE TRANSMITTED THROUGH AN INTERFACE AND ITS POWER SPECTRUM. TO FULLY APPLY ADVANCED SIGNAL ANALYSIS TECHNIQUES TO DETERMINING QUANTITATIVE INFORMATION ABOUT DEFECTS AND IMPERFECTIONS IT IS NECESSARY TO COMPENSATE FOR THE FREQUENCY DEPENDENT EFFECTS INTRODUCED BY SURFACE ROUGHNESS. THIS PROJECT PROPOSES TO MODEL SURFACE ROUGHNESS TO OBTAIN A MEANS OF NUMERICALLY EVALUATING ITS EFFECT ON BOTH THE POWER SPECTRUM OF A TRANSMITTED IMPULSE AND THE TEMPORAL TRANSMITTED SIGNAL. THE ROUGHNESS IS SCALED RELATIVE TO AN ACOUSTIC WAVELENGTH AND IS DIVIDED INTO FINE GRAINED AND LARGE SCALE IRREGULARITIES. THE FINE GRAINED ROUGHNESS IS MODELED BY AN INTERVENING LAYER WITH EFFECTIVE PHYSICAL PROPERTIES. THE SOLUTION TO THE MODEL ROUGHNESS CONFIGURATION PROVIDES A TRANSFER FUNCTION WHICH YIELDS THE FOURIER SPECTRUM OF THE TRANSMITTED IMPULSE FROM WHICH THE POWER SPECTRUM IS DETERMINED. BY COMPENSATING FOR THE EFFECT OF SURFACE ROUGHNESS, A MORE DETAILED QUANTITATIVE ANALYSIS OF DEFECT STRUCTURE IS POSSIBLE.

Principal Investigator:

James n lange
4053770826

Business Contact:

Small Business Information at Submission:

Intercomp
Rt 3 - Box 212 Stillwater, OK 74074

EIN/Tax ID:
DUNS: N/A
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No