权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Study on flux-differential type eddy-current testing technique by planar coils

平面线圈磁通差式涡流检测技术研究

基本信息

批准号：
07650481
负责人：
YAMADA Sotoshi
金额：
$ 1.41万
依托单位：
Kanazawa University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1996
项目状态：
已结题

项目摘要

We proposed a new planar type eddy-current probe that detects induced voltage as sensing signal. We researched the detection characteristics and application of this ECT probe as one of the advanced non-destructive inspection. The achievements of the research project are follows ;1.Fabrication of meander/mesh planar probeWe developed the planar ECT probe as most excellent ECT structure where a meander type coil, and a mesh coil are used as exciting, and sensing coils respectively. The probe is flexible in structure and can be scanned close to the surface of object. Particularly, it is easy to fabricate it by etching techniques.2.Characteristics of the planar ECT probeRegarding the advanced ECT techniques, the detection of shape, size, and direction of crack or defect is needed actually. We confirmed experimentally that the ECT probe has the sensitivity enough to detect the 60%, 10mm outside crack with 1.0mm copper plate. The 2-D imaging pattern of the sensing signal enables us to give the information of size, shape, and direction of crack. And we measured the detecting characteristics by using Inconel 600 plate which is pipe-material at atomic power plant.3.Inspection printed wiring by using ECT approachWe discussed the possibility of using ways of this probe to inspect disconnections in printed wirings. To induce eddy currents on printed wiring, the meander exciting coil of the ECT probe has the suitable structure. Experimentally, we confirmed that we can detect the signal of disconnection. But to check the defect on the complicated wiring pattern, we also need the comparison techniques as teaching signal at the normal wiring board.

提出了一种以感应电压为传感信号的新型平面型涡流探头。研究了该探头作为一种先进的无损检测方法的检测特性及其应用。本研究项目取得了以下成果：1、研究成果；弯曲/网状平面探头的制作我们开发了一种最优秀的平面电痉挛探头，其中弯曲线圈和网状线圈分别用作激励线圈和传感线圈。该探头结构灵活，可以接近物体表面进行扫描。特别是，它很容易通过蚀刻技术制造。平面电刺激探头的特点对于先进的电刺激技术，实际需要对裂纹或缺陷的形状、大小和方向进行检测。我们通过实验证实，ECT探头具有足够的灵敏度，可以检测到1.0mm铜板的60%，10mm的外部裂纹。传感信号的二维成像模式使我们能够给出裂纹的大小、形状和方向信息。利用核电站管道材料英科乃尔600板测量了其探测特性。用ECT方法检查印刷电线我们讨论了用这种探针方法检查印刷电线断开的可能性。为了在印刷线路上产生涡流，电痉挛探头的弯曲激励线圈具有合适的结构。实验证实，我们可以检测到断开的信号。但是为了检查复杂布线模式上的缺陷，我们还需要在正常布线板上进行教学信号的比较技术。