A high-frequency current sensor for collecting weak electromagnetic signals

By designing an openable sensor half-ring and signal processing circuit, the problem of inaccurate alignment of the magnetic core of the high-voltage cable sensor was solved, improving signal sensing sensitivity and measurement accuracy, simplifying the installation process, and enhancing electrical connection and structural stability.

CN224366103UActive Publication Date: 2026-06-16NINGBO IRON & STEEL
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
NINGBO IRON & STEEL
Filing Date
2025-04-29
Publication Date
2026-06-16

AI Technical Summary

⚠Technical Problem

Existing high-voltage cable sensors suffer from low signal sensitivity and complex installation when detecting weak abnormal electromagnetic signals due to inaccurate magnetic core alignment leading to magnetic leakage. This also affects the detection effect and efficiency.

⚗Method used

The design incorporates an openable sensor semi-ring, using positioning blocks and slots to align the magnetic core, with coil leads forming an electrical connection and fixed with epoxy resin. Combined with signal amplification, integration, and filtering circuits, the signal accuracy and stability are improved.

🎯Benefits of technology

It significantly improves the alignment accuracy of the magnetic core, reduces magnetic leakage, enhances the sensor's sensitivity to weak electromagnetic signals, simplifies the installation process, strengthens the reliability of electrical connections and structural stability, and improves measurement accuracy and resistance to external magnetic interference.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a kind of high-frequency current sensors of weak electromagnetic signal acquisition, belong to current detection technical field.It includes: two openable sensor half rings, sensor half ring includes shell and the sensor coil of being set in shell inner chamber;Two ends of sensor half ring are spliced end face, and the spliced end face of two sensor half rings is equipped with complementary positioning mechanism and electrical connection mechanism, and positioning mechanism includes the positioning block of outer convex setting and the positioning groove of inner recess setting;Electrical connection mechanism includes coil lead and lead pin hole;When two sensor half rings are spliced, positioning block is embedded in positioning groove to realize the cross section alignment of two sensor coils, while coil lead is inserted into lead pin hole to form electrical connection.The cooperation of positioning block and positioning groove, the cooperation of coil lead and lead pin hole, the cross section of the magnetic core of two sensor coils can be completely aligned when closing, avoid a large number of magnetic leakage at the cross section of the magnetic core, ensure the accuracy of sensor sensing weak electromagnetic signal.
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