Electromagnetic device for inhibiting rebound of multi-pulse Hopkinson bar and control method

Abstract

The invention relates to the field of an electromagnetic field and a sensor, particularly relates to an electromagnetic device for inhibiting rebound of a multi-pulse Hopkinson bar and a control method, effectively solves the problem of rebound of an incident bar and a transmission bar after the Hopkinson bar is subjected to multi-pulse loading, and improves accuracy of measurement. The electromagnetic device comprises a first coil, a second coil, a photoelectric sensor and a circuit system; the circuit system is respectively connected with the first coil, the second coil and the photoelectricsensor; the transmission bar of the Hopkinson bar is fixed on a buffer baffle; the first coil is inserted at one end of the transmission bar of the Hopkinson bar, and the other end of the transmission bar is connected with the incident bar of the Hopkinson bar; the second coil is inserted at one end of the transmission bar, and the photoelectric sensor is arranged at the other end of the incidentbar; and the transmission bar and the incident bar of the Hopkinson bar respectively protrude out of the first coil and the second coil.

Description

technical field [0001] The invention relates to the fields of electromagnetic fields and sensors, in particular to an electromagnetic device and a control method for suppressing the rebound of a multi-pulse Hopkinson rod. Background technique [0002] Nowadays, the research on the dynamic mechanical properties of materials under high strain rates, especially the impact loads caused by car impacts, secondary impacts in earthquakes, secondary explosions of bombs, etc., has become a hot spot in the research topic of material properties. These shock loads can be generated by impacting bullets, and one such device is a continuously loaded multi-pulse Hopkinson rod device. During the loading pulse process of the multi-pulse Hopkinson rod device, there will be a rebound phenomenon after the pulse, which is not conducive to the continuous loading of the next pulse, so it will affect the input and output strain force waveform acquisition at both ends of the sample, resulting in inacc...

AI Technical Summary

Problems solved by technology

During the loading pulse process of the multi-pulse Hopkinson rod device, there will be a rebound phenomenon after the pulse, which is not conducive to the continuous loading of the next pulse, so it will affect the input and output strain force waveform acquisition at both ends of the sample, resulting in inaccurate measurement

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