| 摘要 |
<p>PURPOSE: A rotary angle detecting device, a rotary angle detecting method, and a part mounting device are provided to detect a rotary angle of a rotator at high precision by suing a magnetic sensor. CONSTITUTION: A rotary angle detecting device comprises a supporter(61), a rotator, a rotary angle detecting unit(90), and a position detecting unit. The rotator comprises a rotary shaft. The rotary angle detecting unit comprises a magnet and magnetic sensor. The magnet is attached on one between the supporter and rotator. The magnetic sensor is attached on the rest one between the supporter and rotator. The rotary angle detecting unit detects a rotary angle of the rotator with respect to the supporter based on output signals of the magnetic sensor. The position detecting unit detects that the rotator is positioned at a detection position where a distance toward a direction of rotary shafts of the magnetic sensor and magnet becomes a predetermined detection distance. The rotary angle detecting unit reads the output signals of the magnetic sensor and obtains the rotary angle of the rotator with respect to the supporter based on the output signals when the position detecting unit detects that the rotator is positioned at the detection position.</p> |
