| 摘要 |
A process and apparatus for determining the position of elongated objects such as insulated cable, tubing, and the like, with respect to a reference axis, for example, that of a vulcanizing tube in which a localized magnetic alternating field is produced around a specified section of the object and the intensity of the magnetic field produced by the current induced in the object is diametrically measured at a distance from this section. A signal proportional to the sum of measured field intensities is used to regulate the field strength of the localized magnetic field so that a signal proportional to the difference of the measured field intensities becomes an indication of the absolute position of the object with respect to the reference axis. |
