A pipeline internal and external defect detection device based on magnetic guide focusing and zero magnetic and magnetic leakage cooperation
The zero-magnetic and leakage magnetic field co-detection device with magnetic focus solves the problems of large size, poor throughput and limited detection depth of existing pipeline inspection equipment, and realizes high-sensitivity synchronous detection of defects inside and outside the pipeline, adapting to complex working conditions.
CN122409820APending Publication Date: 2026-07-17UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- UNIV OF ELECTRONICS SCI & TECH OF CHINA
- Filing Date
- 2026-05-20
- Publication Date
- 2026-07-17
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Figure CN122409820A_ABST
Abstract
本发明公开了一种基于磁导聚焦的零磁与漏磁协同的管道内外缺陷检测装置，通过零磁探头对被检试件施加磁化磁场，利用其底部的倒V型缺口槽改变磁力线分布，在槽内形成背景磁场强度趋于零的矢量叠加区以作为零磁区域，由所述第一磁传感器阵列感测因内部表面缺陷引起的微小磁通畸变信号；同时，通过L型磁导对磁力线进行导向并在其垂直导磁段底端对应的下方区域形成磁力线高密度聚焦区，使被检试件对应部位获得充分磁化以作为漏磁区域，由第二磁传感器阵列感测因远端外部缺陷产生的泄漏磁通信号；第一磁传感器阵列与第二磁传感器阵列的信号端均与单片机电连接，从而通过单一探头结构实现零磁高灵敏度检测与漏磁聚焦检测的并行与同步采集，进而实现管道内外缺陷检测。
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