| 摘要 |
PROBLEM TO BE SOLVED: To simplify part management and assembling work for further reduction in costs and weight by transmitting a signal from a rotation detection sensor 40 to a controller 36 via wireless transmission. SOLUTION: The rotation detection sensor 40, a processing circuit 44, a transmission circuit 45, and an antenna 46 are held together in a single holder 43. The processing circuit 44 rectifies a part of alternating current signal generated by the rotation detection sensor 40 to obtain a direct current necessary for operation of the transmission circuit 45. The rotation detection sensor 40, the processing circuit 44, the transmission circuit 45, and the antennal 46 can be handled as an integrated sensor unit 42, part management and assembling work can be simplified for further reduction in costs and weight. |
