ROTATION ANGLE DETECTING APPARATUS AND POWER TRANSMISSION AND RECEIVING SYSTEM FOR VEHICLE

In a rotation angle detecting apparatus (50; 60), a ground unit (21) in a parking space (5) has a linear side (21a) facing toward the approaching vehicle (3), an in-vehicle unit (41) is able to face the ground unit, a processor is configured to, after the vehicle starts parking, acquire a first timing (T1) at which one of first and second sensors (34, 35), arranged in a right and left direction of the vehicle, begins to face the ground unit and a second timing (T2) at which the other one begins to face the ground unit based on a change of an output signal of one of the sensors, and to calculate a vehicle moving distance from the first timing to the second timing based on an output signal of a rotation angle sensor and calculate an arc tangent value of a value obtained by dividing the calculated moving distance by a sensor-to-sensor distance as a yaw angle.