| 摘要 |
<p>An aerospace probe (1) for sensing speed of movement of a body of magnetic material in an aero engine. The probe (1) comprises a magnet (2), a magnetically energisable pole piece (3,4) adjacent and magnetically coupled to the magnet (2), a sensing coil (5) of conductive material wound around the pole piece (4), a conductive washer (7) extending around the pole piece (4). The sensing coil (5) is located between the conductive washer (7) and the magnet (2) and the washer (7) acts to limit or reduce the rate of increase of voltage in the sensing coil (5) as the speed of movement of the magnetic material increases.</p> |
