| 摘要 |
<p>A linear measurement and control apparatus uses a press roll (20) for directly engraving the surface (64) of a linear control bar (60) and then engaging the control bar (60) which may be attached to a machine element for measuring its linear motion and thereby identifying its position. As the machine elements moves, the attached control bar (60) transmits its motion to the press roll (20), inducing rotation. The press roll (20) is attached to a measurement disk (10) having a sensory pickup feature (18) so that rotation of the press roll (20) may be sensed. Light transmission, light reflection, magnetic field positioning and similar means may be used for sensing motion of the measurement disk (10) and for counting pulses for determining the position and rate change of position of the machine element.</p> |
