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A 4 probe array

Abstract

A NDT system is described which moves away from the present manual method using a single send/receive transducer combination and uses instead an array of four transducers. Four transducers are shown sufficient to define a point reflector with a resolution of m{lambda}z/R where m{lambda} is the minimum detectable path difference in the system (corresponding to a m cycle time resolution), z the range and R the radius of the array. Signal averaging with an input ADC rate of 100 MHz is used with voice output for the range data. Typical resolution measurements in a water tank are presented. We expect a resolution of the order of mm in steel at a range of 80 mm. The system is expected to have applications in automated, high resolution, sizing of defects and in the inspection of austenitic stainless steel welds. (author)
Authors:
Fernando, C E [1] 
  1. CEGB, Marchwood Engineering Laboratories, Marchwood, Southampton, Hampshire (United Kingdom)
Publication Date:
Nov 01, 1980
Product Type:
Conference
Report Number:
IWGFR-35
Resource Relation:
Conference: IAEA-IWGFR specialists' meeting on in-service inspection and monitoring of LMFBRs, Bensberg (Germany), 20-22 May 1980; Other Information: 5 figs; PBD: Nov 1980; Related Information: In: Specialists' meeting on in-service inspection and monitoring of LMFBRs. Summary report, 212 pages.
Subject:
42 ENGINEERING; DEFECTS; MEASURING INSTRUMENTS; NONDESTRUCTIVE TESTING; RESOLUTION; TANKS; TRANSDUCERS
OSTI ID:
20241824
Research Organizations:
International Atomic Energy Agency, International Working Group on Fast Reactors, Vienna (Austria)
Country of Origin:
IAEA
Language:
English
Other Identifying Numbers:
TRN: XA0201104015407
Availability:
Available from INIS in electronic form
Submitting Site:
INIS
Size:
page(s) 158-160
Announcement Date:

Citation Formats

Fernando, C E. A 4 probe array. IAEA: N. p., 1980. Web.
Fernando, C E. A 4 probe array. IAEA.
Fernando, C E. 1980. "A 4 probe array." IAEA.
@misc{etde_20241824,
title = {A 4 probe array}
author = {Fernando, C E}
abstractNote = {A NDT system is described which moves away from the present manual method using a single send/receive transducer combination and uses instead an array of four transducers. Four transducers are shown sufficient to define a point reflector with a resolution of m{lambda}z/R where m{lambda} is the minimum detectable path difference in the system (corresponding to a m cycle time resolution), z the range and R the radius of the array. Signal averaging with an input ADC rate of 100 MHz is used with voice output for the range data. Typical resolution measurements in a water tank are presented. We expect a resolution of the order of mm in steel at a range of 80 mm. The system is expected to have applications in automated, high resolution, sizing of defects and in the inspection of austenitic stainless steel welds. (author)}
place = {IAEA}
year = {1980}
month = {Nov}
}