Pipeline defect weak magnetic internal detector and detection method
By flexibly configuring the detector inside the spherical carrier, the problems of large volume, high cost and many blind spots in pipeline inspection in the existing technology are solved, realizing high-frequency, flexible and reliable inspection of metal and non-metal pipelines, and improving the detection rate of small-sized defects.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- TIANJIN UNIV
- Filing Date
- 2026-05-27
- Publication Date
- 2026-07-17
AI Technical Summary
Existing pipeline defect detection technologies suffer from problems such as large size, high cost, insufficient sensitivity, difficulty in adapting to non-metallic pipelines, and numerous detection blind spots. In particular, cylindrical internal detectors are prone to clogging in small-diameter pipelines and have large detection blind spots in non-metallic pipelines. External monitoring methods are labor-intensive and have low coverage.
By employing a spherical carrier-based detector, and through flexible configuration of three aspects—magnetic sensor arrangement (circumferential multi-channel array or central single channel), spherical shell material (metal or non-metal), and spherical density (submerged or floating)—combined with an accelerometer and a positioning magnetic emission coil, various defects inside pipelines can be detected.
It enables miniaturized, low-cost, and adaptable high-frequency routine inspections of both metal and non-metal pipelines. Its flexible configuration adapts to various pipeline defect detections, eliminates blind spots in detection, and improves the detection rate of small-sized defects.
Smart Images
Figure CN122409822A_ABST