| 摘要 |
A photoelectric apparatus for monitoring a dimension and the position of an object placed in a space defined between two substantially parallel measuring planes, which comprises a light emitter arrangement including a sequence of light emitters arranged in one of the measuring planes, a light receiver arrangement including a like sequence of light receivers arranged in the other measuring plane, each of the light emitters being arranged to emit a light beam into the space towards a respective one of the light receivers, and an electronic processor unit for determining an interruption of the light beam by the object placed in the space, the processor unit including a timed control for sequentially operating each light emitter with at least two light receivers. |
