【摘要】 目的　通过提取裂纹信号实现板材裂纹深度的定量标定.方法　采用相敏检波电路提取裂纹信号.结果　该方法对提取裂纹信号是有效的.结论　裂纹深度与裂纹信号的大小成单调上升关系.更多还原

【Abstract】 Aim\ To achieve quantitative indication of crack depth on the surface of steel material in eddy current flow detection. Methods\ A phasesensitive circuit is used to detect the signal of cracks. Results\ For getting a signal of crack depth, this method is effective. Conclusion\ There is a monotonic relation between the increment of crack depth and that of crack signal.更多还原