| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a derailment detector of a rolling stock, surely and quickly detecting the derailment, and a lift detector of a rolling stock, detecting the lift which leads to the derailment. <P>SOLUTION: A determination device in a control circuit 28 determines whether a derailment exists, according to a measured signal from a vibration sensor which forms a sensor unit 17 supported and fixed to a part of a double row tapered roller bearing unit 8. The measured signal passes through a band pass filter for changing a passing frequency band by the measurement signal from a rotational speed sensor for measuring the rotational speed of another axle. The determination device determines that the derailment is present when an output passing through the band pass filter does not exist. The determination device also determines that the lift occurs, when the magnitude of the vibration occurring at the pair of double row tapered roller bearing units 8, 8 portions changes largely. <P>COPYRIGHT: (C)2010,JPO&INPIT |
