Supervisor:
Southwest Ordnance Industry Bureau
Organizer:
Chongqing Ordnance Industry Society
Chongqing University of Technology
Chongqing University of Technology
Analysis of target magnetic anomaly under excitation magnetic field
| DOI: | 10.11809/bqzbgcxb2025.03.020 |
| Keywords: | magnetic detection; exciting magnetic field; magnetic anomaly; magnetic sensor; permanent magnet |
| Abstract: | In order to solve the problem of short detection range of common magnetic sensors, the excitation magnetic field can be used to enhance the target magnetic anomaly and expand the detection range of magnetic sensors. By arranging magnetic steel to generate a magnetic field for the sensor, the target is magnetized to produce noticeable magnetic anomalies, which are then detected by the sensor. Four different configurations of magnetic steel structures were founded, and the response characteristics of the magnetic sensor were compared and simulated using typical iron bars as targets. Based on these findings, a magnetic detection device was designed and its actual detection performance was verified through experiments. The results show that, compared to detection without magnetic steel, the excitation magnetic field effectively expands the magnetic anomaly and detection range of the target. When two pieces of magnetic steel are arranged vertically with the measuring point of the magnetic sensor at the center, the magnetization effect on the iron bar is most significant, producing the largest magnetic anomaly and facilitating signal collection. This research provides a new technical approach to enhance the detection characteristics of magnetic sensors. |
| Issue: | Vol. 46 No. 3 (2025) |
| Published: | 2025-03-31 |