| 摘要 |
PROBLEM TO BE SOLVED: To provide a bearing with a simple composition capable of easily and accurately detecting a state of an anomaly or the like of a bearing interior and preventing the bearing from causing fracture, seizure or the like. SOLUTION: A self-transmitting type spherical sensor 5 is attached to a bearing component such as a retainer 4. In the spherical sensor 5, a spherical semiconductor has a sensing circuit, a radio transmission circuit, and a logic circuit and the circuits have coils for wireless feeding. |
