A portable inductive scanning system for imaging steel-reinforcing bars embedded within concrete

被引：34

作者：

Gaydecki, P ^{[1
]}

Silva, I ^{[1
]}

Fernandes, BT ^{[1
]}

Yu, ZZ ^{[1
]}

机构：

[1] Univ Manchester, Inst Sci & Technol, Dept Instrumentat & Analyt Sci, Manchester M60 1QD, Lancs, England

来源：

SENSORS AND ACTUATORS A-PHYSICAL | 2000年 / 84卷 / 1-2期

基金：

英国工程与自然科学研究理事会;

关键词：

inductive sensors; imaging; deconvolution; concrete nondestructive testing; portable scanners;

D O I：

10.1016/S0924-4247(99)00296-4

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A novel portable scanning system and inductive sensor that produces images of steel-reinforcing bars embedded within concrete by an inductive principle is described. The sensing element, which comprises a field-compensated receiving coil, detects the magnetic field generated by the steel bars due to eddy currents induced on their surfaces by an excitation coil. The sensor is mounted within a purpose-designed computer-controlled x-y scanner used to collect data within a 400 X 400 mm(2) area in 18 min, using a scan step of 1 mm along the x-axis and 2 mm along the y-axis. This scanner assembly is fabricated from a unique combination of plastic components to avoid disruption of the magnetic field as signals are acquired. The sensor is translated within the frame using remotely placed stepper motors, and images are generated with a grey-scale resolution of 16 bits/pixel. These images are then enhanced using application-specific image processing techniques developed by the authors. The complete system incorporates fully integrated control, acquisition and processing software, which makes it convenient for on-site use. (C) 2000 Elsevier Science S.A. All rights reserved.

引用

页码：25 / 32

页数：8

共 11 条

[1]

ALLDRED J, 1995, P INT S NOND TEST CI, V1, P721

[2]

ALLDRED JC, 1995, P C STRUCT FAULTS RE, V2, P11

[3]

Gaydecki PA, 1996, REV PROG Q, V15, P1791

[4] AN INDUCTIVE SCANNING SYSTEM FOR 2-DIMENSIONAL IMAGING OF REINFORCING COMPONENTS IN CONCRETE STRUCTURES [J].