| 摘要 |
<p>A device for measuring distance between walls of coaxial cylindrical screens is provided. Rotation of motors 26, 26' is rotated to screw bars 30, 30' and rotation of the screw bars 30, 30' is converted to translational movement of gauge bars 23, 23'. The numbers of rotation of the screw bars 30, 30' corresponding to length of projection of the gauge bars 23, 23' from their withdrawn positions to positions at which they abut against wall surfaces of the screens are measured by rotary encoders 41, 41' and the distance between wall surfaces of the screens thereby is measured. A main body of the device is fixed between the wall surfaces of the screens by means of the projecting gauge bar 23 and a pair of main body supporing units 18, 18. <IMAGE></p> |
