Location

La Jolla ,CA

Start Date

1-1-1989 12:00 AM

Description

Capacitive array sensors are one among many electromagnetic techniques that can be used to detect flaws or other irregularities at or near the surface of materials. Capacitive sensors have an advantage over inductive sensors in that insulating materials may be interrogated as well as conducting materials. These sensors have seen some application in nondestructive evaluation, including flaw detection, the monitoring of porosity and thickness of thermal barrier coatings, dielectric cure monitoring, and robotic proximity sensing [1, 2]. Only surface features can be examined on metallic plates because the accumulation of surface charges blind the capacitive probe to interior features. In dielectric materials, both surface and subsurface features can be examined.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

8A

Chapter

Chapter 4: Probes and Sensors

Section

Process Control Sensors

Pages

1023-1030

DOI

10.1007/978-1-4613-0817-1_128

Language

en

File Format

application/pdf

Share

COinS
 
Jan 1st, 12:00 AM

Numerical Simulation of Flaw Detection with a Capacitive Array Sensor Using Finite and Infinite Elements

La Jolla ,CA

Capacitive array sensors are one among many electromagnetic techniques that can be used to detect flaws or other irregularities at or near the surface of materials. Capacitive sensors have an advantage over inductive sensors in that insulating materials may be interrogated as well as conducting materials. These sensors have seen some application in nondestructive evaluation, including flaw detection, the monitoring of porosity and thickness of thermal barrier coatings, dielectric cure monitoring, and robotic proximity sensing [1, 2]. Only surface features can be examined on metallic plates because the accumulation of surface charges blind the capacitive probe to interior features. In dielectric materials, both surface and subsurface features can be examined.