| 摘要 |
<p>1,121,750. Measuring rate of rotation. HONEYWELL Inc. July 21, 1967 [July 25, 1966; Aug.29, 1966], No.33578/67. Heading G1N. Apparatus for measuring rate of rotation comprises an electrically conductive vibratory wire 12 restrained at three points 14, 22, 16 dividing the wire into first and second portions each extending through a respective one of two perpendicular magnetic fields, and a signal generator 42 connected to points 14, 22 for passing an alternating current through the first portion of the wire to cause the wire to vibrate in the vertical plane as seen in the drawing, so that when the apparatus is rotated about the longitudinal axis of the wire 12, the second portion of the wire tends to lag relative to the support 10 and will thus intersect lines of the magnetic field so that an alternating voltage is generated in the second portion of the wire. The generated voltage has an amplitude dependent on the rate of rotation and a phase dependent on the direction of rotation. The frequency of generator 42 is the same as the natural resonant frequency of the wire. Point 22 may be at the midpoint of wire 10 or may be offset therefrom by up to 6% of the total length of the wire to damp out unwanted vibrations. There may be two supports 22 one each side of the midpoint of the wire. As shown, the support 22 is in the form of a cross wire rigidly attached to wire 12. Instead, a knife edge or a small hole in a bracket may be used. The two portions of the wire 12 may be of different weights.</p> |
