Travelled distance measuring and positioning device - has shaped dielectric plate movable between plates of capacitor varying capacitance

摘要

The device positions tools, workpieces and machines. It consists of a mechanical and electrical part. A shaped piece of dielectric (3) is moved by the monitored object between plates (1, 2) of a first capacitor (5) connected to a transformer (B) secondary winding (2B) whose end is connected to the end of a further secondary winding (3B). The secondary winding (3B) is connected to a second fixed capacitor (4). Both windings are balanced, and the primary winding (1B) is connected to an oscillator (A). The junction point between the two secondary windings (2B, 3B) is connected to an amplifier (C), a rectifier (D) and a digital display unit (E).