| 摘要 |
The present invention provides a moving body of ceramics having discriminating marks and supported for movement with respect to a base member, and further provides means capable of detecting with high accuracy the position of the moving body, which is submerged or in high temperature atmosphere. The means is to detect the position of the moving body, or a shaft(1) supported for sliding movement to a mounting base(2) through bearings(9). The shaft(1) is provided on the periphery thereof with discriminating marks(3) of magnetic stripes having predetermined widths. A magnetic sensor(4) is mounted on the base member(2). The discriminating marks(3) are composed of magnetic recognition marks(5) and nonmagnetic recognition marks(6), the magnetic recognition marks(5) being made of a paste containing iron therein and the nonmagnetic recognition marks(6) being made of a ceramic paste, both of the pastes are printed on a sheet in such a manner that they are alternately applied in the form of stripes with predetermined widths. The shaft is impregnated with the sheet under pressure to thereby form the discriminating marks(3) on the shaft(1). <IMAGE> |
