周期性欠陥検出方法および周期性欠陥検出装置
- 专利权人:
- 发明人:
- 申请号：
- JP20110020153
- 公开号：
- JP5614312(B2)
- 申请日:
- 2011.02.01
- 申请国别(地区):
- 日本
- 年份:
- 2014
- 代理人:
- 摘要：
PROBLEM TO BE SOLVED: To provide a periodic defect detecting device being usable even when a generation period is unknown and being indifferent even when a region required for synchronous addition is a little.
SOLUTION: The periodic defect detecting device includes: magnetizers 4 and 4' applying a magnetic field to a steel plate 2; a surface magnetic sensor 5 that detects a magnetic flux leakage leaked to the surface of the steel plate 2 to obtain surface measurement data; a backside magnetic sensor 5' that detects a magnetic flux leakage leaked to the backside of a test object to obtain backside measurement data; periodicity determining device 8 that determines a generation period of the periodic defect based on the surface measurement data and the backside measurement data; a data column adding section 91 that performs a synchronous addition by assembling the surface measurement data and the backside measurement data at the same position in the surface and the backside of the steel plate 2; and a
- 来源网站：
- 中国工程科技知识中心
