ROTARY ENCODER FOR HIGH FREQUENCY OSCILLATION PROXIMITY SENSOR

摘要

A rotary encoder utilizing a proximity sensor of a high-frequency oscillating type is provided to prevent reducing performance due to temperature and reduce a manufacturing cost due to not forming an isolation space as a sensor detecting the number of rotation of rotator detects the number of rotation by measuring resistance value when a detection protrusion of a rotator is passed. A rotator(10) in which a plurality of detection protrusions(11) are formed according to a outer circumference is formed. An oscillation detector(20) oscillates high frequency and transmits the high frequency in a register having a constant resistance value and detects a detection protrusion. A comparator circuit(30) compares the detected signal with a reference signal oscillated in the oscillation detector. A rectifier circuit(40) rectifies the detection signal compared in the comparator circuit. An output circuit(50) outputs the detection signal to an output device.