ROTATIONAL SPEED DETECTION DEVICE FOR TOP

摘要

An object of the present invention is to provide a rotation-rate detector for a spinning top with minimum erroneous detections. A rotation-rate detector (information logger 100) detects a rotation rate of a spinning top 300 and is fixed to or detachably attached to a launcher 200. The launcher 200 applies a rotational force to the spinning top 300 attached to the launcher 200 to launch the spinning top 300. The rotation-rate detector includes a detachment detector 130 that detects detachment and attachment of the spinning top 300. The rotation rate of the spinning top 300 is detected after the detachment detector 130 detects attachment of the spinning top 300.