Design of an Electromagnetic Particle Velocity Measurement System Based on Superconducting Magnet

The electromagnetic particle velocity measurement technology is an important measurement method in the study of stress wave propagation. This article analyzes the problem that the pulsed-magnetic-field-based electromagnetic particle velocity measurement technology will introduce additional induced electromotive force and proposes an electromagnetic particle velocity measurement technology based on superconducting magnet. After considering the factors of electromagnetism, structure, and heat distribution, a superconducting magnet with 500-mm room-temperature bore was constructed, and the proposed electromagnetic particle velocity measurement system based on the superconducting magnet was designed subsequently. The experiment of filled explosion in polymethyl methacrylate (PMMA) was carried out, and high-quality particle velocity and displacement signals were obtained, which verified the measurement performance of the system. The proposed method can provide a more powerful test means for the study of stress wave propagation.