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

In a rotation angle detecting apparatus, a ground unit in a parking space has a linear side facing toward the approaching vehicle, an in-vehicle unit is able to face the ground unit, a processor is configured to, after the vehicle starts parking, acquire a first timing at which one of first and second sensors, arranged in a right and left direction of the vehicle, begins to face the ground unit and a second timing 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.