Patent ID: 9441968
Filing Date: 2016-09-13
CPC Classification: G01C

Claim Text:
1. A direction detector, comprising: an angular velocity sensor; an attitude changer that rotates the angular velocity sensor around a detection axis and changes an attitude of the angular velocity sensor so that the detection axis is directed in a predetermined measuring direction and an opposite direction to the predetermined measuring direction; and a control device that controls the attitude changer, the control device comprising: a first controller that controls the attitude changer so that the angular velocity sensor rotates in a first rotation direction around the detection axis before the angular velocity sensor starts to detect an angular velocity around the predetermined measuring direction, and a second controller that controls the attitude changer so that the angular velocity sensor rotates in a second rotation direction opposite to the first rotation direction around the detection axis and, thereafter, the angular velocity sensor rotates in the first rotation direction around the detection axis before the angular velocity sensor starts to detect an angular velocity around the opposite direction.