| 摘要 |
PROBLEM TO BE SOLVED: To provide a rolling bearing unit with a sensor wherein the sensor is internally stored by dispensing with the replacement of a battery. SOLUTION: This rolling bearing unit with the sensor is provided with an outer ring, an inner ring, a rolling bearing having a plurality of rolling bodies arranged between these members, and a sensor device 2 having the sensor 13, a transmission part 15 for transmitting information detected by the sensor 12 by radio transmission, and the battery 12 for supplying a power source to the transmission part 15. The battery 12 is a secondary battery chargeable by a power source supply method by noncontact type electromagnetic coupling.
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