Title:
EDDY CURRENT FLAW DETECTOR
Document Type and Number:
Japanese Patent JP2018189530
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an eddy current flaw detector formed of a high-temperature super-conductive wire material, the detector attaining reduction in the size and in the cost of the device by using an inverter circuit and a bridge circuit and also achieving increase in the portability.SOLUTION: The present invention includes a bridge circuit 23 formed in such a manner that a direct current power source 21 for supplying a direct current, an inverter 22 for converting the direct current from the direct current power source 21 into an alternating current, a measuring unit 30a with at least a high-temperature super-conductive coil 11, and an equilibrium adjustment unit 30b with at least a resistor are arranged in parallel. The measurement unit 30a is made of a circuit in which the high-temperature super-conductive coil 11 and a shant resistor 31 are serially connected, and the equilibrium adjustment part 30b is made of a circuit in which a variable resistor 33 and a capacitor 32 for equilibrium are serially connected.SELECTED DRAWING: Figure 2
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Inventors:
SASAYAMA TERUYOSHI
ENPUKU KEIJI
ENPUKU KEIJI
Application Number:
JP2017092788A
Publication Date:
November 29, 2018
Filing Date:
May 09, 2017
Export Citation:
Assignee:
UNIV KYUSHU
International Classes:
G01N27/90
Attorney, Agent or Firm:
Yasuo Hirai