Sensor device and rolling bearing with sensor
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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Abstract
A sensor device includes: a detected part D having a movable element 5 and a fixed element 3 contacting each other in which a contact area of the both elements changes corresponding to an external load; a contact area detection sensor 2, provided to the fixed element 3, for detecting the contact area of the detected part D; and processing means for calculating the external load from an sensor output by using the correlation between the external load and the contact area.
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Citations
7 Claims
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1. A rolling bearing device with a sensor function, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification