Location

La Jolla, CA

Start Date

1-1-1991 12:00 AM

Description

The development of this ultrasonic method for determining the modulus of thin adhesive layers was motivated by the recent development of a nonintrusive ultrasonic Liquid Level Sensor (LLS) which meets military specifications for space launch [1,2]. The sensor is designed to signal when the surface of the fuel in a liquid propellant tank has receded to the level of the sensor during flight. As depicted in Fig. 1, the sensor is bonded to the outer tank wall with Versilok 202 (V202) adhesive [3]. To detect the fuel level, the sensor is stimulated to propagate an ultrasonic pulse into the wall of the tank and then used to monitor the height of echoes which return from the inner wall. More details on the basic operation of the sensor are given in references 1 and 2.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

10B

Chapter

Chapter 6: Engineered Materials

Section

Joints

Pages

1351-1357

DOI

10.1007/978-1-4615-3742-7_28

Language

en

File Format

application/pdf

Included in

Manufacturing Commons

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Jan 1st, 12:00 AM

An Ultrasonic Resonance Method to Determine the Acoustic Velocity of Thin Adhesive Layers

La Jolla, CA

The development of this ultrasonic method for determining the modulus of thin adhesive layers was motivated by the recent development of a nonintrusive ultrasonic Liquid Level Sensor (LLS) which meets military specifications for space launch [1,2]. The sensor is designed to signal when the surface of the fuel in a liquid propellant tank has receded to the level of the sensor during flight. As depicted in Fig. 1, the sensor is bonded to the outer tank wall with Versilok 202 (V202) adhesive [3]. To detect the fuel level, the sensor is stimulated to propagate an ultrasonic pulse into the wall of the tank and then used to monitor the height of echoes which return from the inner wall. More details on the basic operation of the sensor are given in references 1 and 2.