Location

Seattle, WA

Start Date

1-1-1996 12:00 AM

Description

Within a highly attenuating material, it is often difficult to identify relevant target signals due to the system’s white noise that is elevated by high gains on a conventional ultrasonic system. Ultrasonic pulse compression technique resolves such problem. The ultrasonic pulse compression technique permits an ultrasonic system to operate with long transmitted pulses for an increased detection range, but without sacrificing the depth resolution by signal correlation. Moreover, the time integral involved in the cross-correlation further suppresses the system’s white noise, and hence it produces an improved signal-to-noise ratio (SNR).

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

15B

Chapter

Chapter 8: Systems, New Techniques and Process Control

Section

New Techniques

Pages

2117-2124

DOI

10.1007/978-1-4613-0383-1_278

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Effects of System’s Limitations on the Accuracy of Measured Ultrasonic Correlated Signal

Seattle, WA

Within a highly attenuating material, it is often difficult to identify relevant target signals due to the system’s white noise that is elevated by high gains on a conventional ultrasonic system. Ultrasonic pulse compression technique resolves such problem. The ultrasonic pulse compression technique permits an ultrasonic system to operate with long transmitted pulses for an increased detection range, but without sacrificing the depth resolution by signal correlation. Moreover, the time integral involved in the cross-correlation further suppresses the system’s white noise, and hence it produces an improved signal-to-noise ratio (SNR).