| 摘要 |
<p>A damping gyrometer comprised of at least two and preferably four rotating paddles of teflonTM or fiberglas attached to a common central elevated low-friction pivot point via rising radial arms. The pivot point is the single point of mechanical support for the rotating structure. A stand with a concave glass element provides a low-friction support as a pivot point seat for the pivot point. All elements of the apparatus are non-conductive. Once set into motion by a short air blast, the only force acting on the gyrometer are the pivot point friction and the damping effects of the medium in which it spins. A laser beam and photodetector (or alternatively a laser displacement sensor), along with customized software algorithms are used to measure the rotational rate and, hence, importantly, the deceleration rate of the apparatus. The declaration of the damping gyrometer can then be used to determine properties of the medium in which it spins, including changes in density, pressure, and temperature. The measurement can also be directly related to the electron density in the case of weakly ionized gases. Use with plasma chamber shock tube for studying the interaction of weakly ionized gases and moving bodies.</p> |
