Motion Sensor

摘要

A motion sensor constituted of: a housing; a rotating member secured to the housing and arranged to rotate about a rotation axis of the rotating member responsive to motion of the housing across a surface; at least one bipolar magnet secured to the rotating member so as to rotate about the rotation axis of the rotating member with the rotation of the rotating member; and a transducer secured to the housing and juxtaposed with the rotating member, the transducer arranged to vary its output voltage in response to changes in magnetic field caused by the rotation of the at least one bipolar magnet.

主权项

1. An aesthetic or medical treatment device comprising:
a housing; a controller; a treatment element responsive to said controller; and a motion sensor, said controller arranged to receive information from said motion sensor and to adjust operation of the treatment element responsive thereto,
said motion sensor comprising:a rotating member secured to said housing and arranged to rotate about a rotation axis of said rotating member responsive to motion of said housing across a skin surface to be treated;at least one bipolar magnet fixed within said rotating member so as to rotate together with rotating member; anda transducer secured to said housing and juxtaposed with said rotating member, said transducer arranged to read at least one magnetic field component (MFC) of said at least one bipolar magnet, and provide an output signal indicative of rotation of said rotating member.