Abstract: The measurement of projectile velocity and displacement is one of the railgun test parameters. The multiple high-speed data acquisition channels are required in the velocity measurement of distributed probes. The new probe in-series and waveform combination methods for measuring the velocity of solid armature in enhanced electromagnetic railgun bore are proposed according to the velocity measuring principle of the B probe. The induced voltage of the probe of enhanced electromagnetic railgun is calculated by using the driving current data and the fitting speed data, and then the probe in-series and waveform combination methods are used to measure the armature velocity, respectively. The simulation and experimental results show that the calculated waveform is basically in agreement with the measured waveform. The proposed methods are compared with the distributed probe measurement method. The two methods need only one high-speed data acquisition port. They have the advantages of low cost and high reliability.

Key words: electromagnetics, enhanced electromagnetic railgun, velocity measurement, B-dot probe, solid armature