Title:
CONDUCTOR THICKNESS DETECTING DEVICE USING A DOUBLE CORE
Document Type and Number:
WIPO Patent Application WO/2012/021034
Kind Code:
A3
Abstract:
According to the present invention, a duct thinning detecting device using a double core is devised so as to evaluate corrosion or changes in thickness (thinning) caused by corrosion of a duct which is covered by an insulator, which is to say losses in the duct, from outside the insulator by using eddy currents by means of a differential probe having a double core without dismantling the insulator in non-destructive testing. More specifically, the present invention comprises: a probe unit having a double core, a drive coil and a differential Hall sensor; a pulse-generating unit which is connected to the probe unit and generates a wide-band pulse voltage that is applied to the drive coil; an amplification unit which is connected to the probe unit and amplifies a measurement signal induced in the Hall sensor; an A/D conversion unit which is connected to the amplification unit and converts the measurement signal to a digital signal; and a control unit which is adapted to control the probe unit, the pulse-generating unit, the amplification unit and the A/D conversion unit while at the same time storing and displaying the digital signal.
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Inventors:
PARK DEUK-GUN (KR)
CHEONG YONG MOO (KR)
KIM WHUNG-WHOE (KR)
CHEONG YONG MOO (KR)
KIM WHUNG-WHOE (KR)
Application Number:
PCT/KR2011/005962
Publication Date:
May 10, 2012
Filing Date:
August 12, 2011
Export Citation:
Assignee:
KOREA ATOMIC ENERGY RES (KR)
PARK DEUK-GUN (KR)
CHEONG YONG MOO (KR)
KIM WHUNG-WHOE (KR)
PARK DEUK-GUN (KR)
CHEONG YONG MOO (KR)
KIM WHUNG-WHOE (KR)
International Classes:
G01B7/06; G01B7/24; G01N17/04
Foreign References:
JP2003270214A | 2003-09-25 | |||
KR20010045270A | 2001-06-05 | |||
EP0819944A1 | 1998-01-21 | |||
EP0332048A2 | 1989-09-13 | |||
JP2001141698A | 2001-05-25 |
Attorney, Agent or Firm:
LEE, Won-Hee (642-16 Yoksam-dongKangnam-ku, Seoul 135-080, KR)
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Claims: