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Sensor device and rolling bearing with sensor

  • US 7,854,169 B2
  • Filed: 11/24/2005
  • Issued: 12/21/2010
  • Est. Priority Date: 11/24/2004
  • Status: Active Grant
First Claim
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1. A rolling bearing device with a sensor function, comprising:

  • a rolling bearing having a fixed side raceway member, a rotational side raceway member, and a rolling element for facilitating rotation of the rotational side raceway member about a rotational axis; and

    a sensor device, wherein the sensor device includes;

    ultrasonic sensors, provided at at least two positions with a prescribed interval in a peripheral direction of the fixed side raceway member, for detecting a rolling element load acting on the rolling element as an echo ratio; and

    processing means for calculating at least a radial directional component and a rotational axis directional component among three-directional force components of a bearing load acting on the rolling bearing from outputs of respective ultrasonic sensors.

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