ROTATION FREQUENCY MEASURING DEVICE

摘要

The device is applicable to machine details with an accessible rotation centre. It has increased functional options and a simplified design. A 15 pulse optocoupler sensor is introduced, the output of which is connected through an amplifier (2) to the first input of a flip-flop (3), whose output is connected to the input of a block with counters and decoders (4) for digital indication control (5). One of the outputs of a quartz generator (6) is connected to one of the inputs of a reset and count enabling block (7), and the second one- to the inputs of the decoders (4) for the change of the voltage polarity of a liquid crystal indicator (5). The supply block (9) is switched on through a self-disconnecting transistor switch.