Abstract: [Resolving Means] A rolling bearing device with a sensor includes: a tubular fixed bearing ring which is fixed to a vehicle body side; a rotating bearing ring which is rotatably inserted in an interior of the fixed bearing ring and is fixed to a tire side; rolling elements which are rollably disposed between these bearing rings; and a sensor device disposed on a fixed bearing ring side. The sensor device has at least two sensors which are arranged at positions perpendicular to each other in a circumferential direction of the fixed bearing ring, and which are respectively capable of detecting the ground contact load of the tire, the sensor device being so constructed as to be able to detect a ground contact load of the tire based on cycles of outputs obtained from the at least two sensors.

Abstract: [Resolving Means] A rolling bearing device with a sensor includes: a tubular fixed bearing ring which is fixed to a vehicle body side; a rotating bearing ring which is rotatably inserted in an interior of the fixed bearing ring and is fixed to a tire side; rolling elements which are rollably disposed between these bearing rings; and a sensor device disposed on a fixed bearing ring side. The sensor device has at least two sensors which are arranged at positions perpendicular to each other in a circumferential direction of the fixed bearing ring, and which are respectively capable of detecting the ground contact load of the tire, the sensor device being so constructed as to be able to detect a ground contact load of the tire based on cycles of outputs obtained from the at least two sensors.

Abstract: An acoustic emission measuring device in which a piezoelectric element (63) used as an AE sensor is secured to the inner ring (62) of a ball bearing (61) fixedly fitted onto a rotating shaft (60). The axial end face of a roughly tire-shaped case (65), which is capable of rotating in synchronism with the inner ring (62) and storing a first coil in which a current flows from the piezoelectric element (63), is secured to the inner ring (62). The axial end face of a roughly tire-shaped case (66) for storing a second coil is secured to an outer ring (64). The first coil and the second coil are oppositely disposed radially outside of the rotating shaft (60) so that the first coil and the second coil can face each other in the radial direction.