Bearing temperature-vibration measurement system based on PT symmetric LC sensor

Abstract

The invention discloses a bearing temperature-vibration measurement system based on PT symmetric LC sensors, and relates to the technical field of bearing fault detection. The system comprises a reading circuit and an LC sensor, the reading circuit comprises a reading coil, the reading coil is connected with a lumped element capacitor and a reading circuit resistor, the LC sensor comprises a planar spiral inductor and a parallel plate capacitor, the planar spiral inductor is connected with the parallel plate capacitor in series, and the reading circuit resistor is connected with the planar spiral inductor. A coupling distance d is kept between the reading coil and the planar spiral inductor, the LC sensor is arranged on a retainer of the bearing, the temperature change in the bearing is sensed through the parallel plate capacitor, and the vibration change of the bearing is sensed through the change of the coupling distance d. The system can realize simultaneous detection of the temperature and vibration of the bearing without using a battery.

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