一种煤矿井下瞬变电磁法屏蔽组合接收装置
By employing multiple shielded receiving units and a shielding cover design made of high-permeability soft magnetic material in the transient electromagnetic detection device in coal mines, the problems of difficult deployment of underground detection devices in confined spaces and electromagnetic interference have been solved, achieving efficient signal shielding and accurate detection, and improving the signal-to-noise ratio and detection capability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- INNER MONGOLIA RESEARCH INSTITUTE CHINA UNIVERSITY OF MINING AND TECHNOLOGY (BEIJING)
- Filing Date
- 2025-10-16
- Publication Date
- 2026-07-17
AI Technical Summary
Existing transient electromagnetic detection devices in coal mines are difficult to deploy in confined spaces, are susceptible to electromagnetic interference from directions other than the detection direction, have weak signals and low signal-to-noise ratios, making it difficult to identify deep targets. The complex electromagnetic environment underground also causes severe noise interference, affecting the accuracy of detection.
A shielded combined receiving device for transient electromagnetic method in coal mines is designed, which adopts multiple shielded receiving units, including receiving coils and shielding covers. The shielding cover is a box with an open top surface, and the receiving opening faces the detection direction. The shielding cover is made of soft magnetic material with high permeability and low coercivity. Multiple receiving coils are evenly distributed along the circumference, and the output signals are synchronously acquired and linearly superimposed.
It effectively shields electromagnetic interference from non-detection directions, improves signal purity and signal-to-noise ratio, enhances detection accuracy, strengthens the ability to detect low-resistivity anomalies, and provides a guarantee for coal mine safety.
Smart Images
Figure CN224518977U_ABST