Electro=optical pick=up for control circuits - has shaper plate coded so that pick=up signal can be directly used for control

摘要

The circuits control processes with specified phasing. The pick-up delivers an output signal depending on the position of a plate or screen between a light source and a receiver. This signal serves as control signal for the process development. After comparison with a nominal value, it is applied as a control signal to a control element. The plate (22) is coded so that the pickup output signal is directly proportional to the speed, acceleration, or other variable of the element to be controlled, so that a direct control of the required variable is possible.