System development for tube inspection based on eddy current technique

Author

Rerkratn, Apinai ; Cheypoca, Thepjit ; Kaewpoonsuk, Anucha

Author_Institution

Fac. of Eng., King Mongkut´´s Inst. of Technol. Ladkrabang, Bangkok, Thailand

fYear

2012

fDate

20-23 Aug. 2012

Firstpage

6

Lastpage

9

Abstract

This paper presents system development for tube inspection based on eddy current. The proposed system consists of sine wave generator circuit, amplifier circuit I, voltage control current source, filter circuit, detector circuit I, detector circuit II, amplifier circuit II, comparator circuit, display circuit and eddy current probe. The system is based on eddy current inspection technique. The eddy current between eddy current probe and metal tube was measured by the proposed circuit. The measured output voltage is applied to the signal processing circuit for display unit. When the investigated metal tube has no defect, green LED is turn on, otherwise the red LED with buzzer is turn on.

Keywords

active filters; amplifiers; comparators (circuits); detector circuits; display devices; eddy current testing; inspection; light emitting diodes; pipes; signal processing; voltage measurement; waveform generators; amplifier circuit; buzzer; comparator circuit; detector circuit; display circuit; display unit; eddy current inspection technique; eddy current probe; filter circuit; green LED; metal tube; output voltage measurement; red LED; signal processing circuit; sine wave generator circuit; tube inspection system development; voltage control current source; Coils; Detectors; Eddy currents; Electron tubes; Inspection; Metals; Voltage control; Eddy current; NDT; Tube inspection;

fLanguage

English

Publisher

ieee

Conference_Titel

SICE Annual Conference (SICE), 2012 Proceedings of

Conference_Location

Akita

ISSN

pending

Print_ISBN

978-1-4673-2259-1

Type

conf

Filename

6318395