| 摘要 |
PROBLEM TO BE SOLVED: To provide a bearing apparatus monitoring system suitable for reducing the influence of noise and improving the detection accuracy. SOLUTION: To each bearing apparatus 14, a vibration sensor and a temperature sensor are attached. Each of vibration sensors A1 to A4 and temperature sensors T1 to T4 outputs a voltage detection signal, corresponding to the level of vibration of the bearing apparatus 14 or temperature as a differential signal. Respective sensors are connected to an operation state monitoring apparatus 20 through a power supply line LP for transmitting power from a power source VS, a ground line LG connected to the ground of the operation state monitoring apparatus 20 side and signal lines LS1 to LS4 for transmitting differential signals. The pairs of the signal lines LS1, LS2, the signal lines LS3, LS4, the power supply line LP, and the ground line LG are respectively constituted of twist lines or shielded twist lines. COPYRIGHT: (C)2007,JPO&INPIT
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