Improved Ultrasonic Spectroscope for Nondestructive Inspection.
ARMY MATERIALS AND MECHANICS RESEARCH CENTER WATERTOWN MASS
Pagination or Media Count:
Improved instrumentation for ultrasonic spectroscopy was developed for the purpose of advanced nondestructive inspection of artillery projectiles. The equipment employs high-gain amplifiers to enable the reception and spectral processing of ultrasonic echo signals whose amplitudes are just above the electronic noise level. By incorporating special circuitry, high sensitivity is achieved without incurring a significant reduction in near-surface resolution which normally is caused by the amplifier paralysis attributable to the transducer excitation pulse. With the newly developed equipment, it is therefore possible to overcome the detrimental effect of losses in ultrasonic signal amplitude arising from the unfavorable goemetry and microstructure of projectiles. Author
- Test Facilities, Equipment and Methods