Wheel impact detectors
Okumaya devam et...
← Previous revision | Revision as of 09:40, 28 April 2024 |
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| === Wheel impact detectors === | === Wheel impact detectors === |
| [[File:HBD-WID_set_north_of_Jinjiang_Leyuan_Station.jpg|thumb|250px|Hot box/wheel impact detectors at Shanghai Metro]] | [[File:HBD-WID_set_north_of_Jinjiang_Leyuan_Station.jpg|thumb|250px|Hot box/wheel impact detectors at Shanghai Metro]] |
| Wheel sensors along the tracks feel for flat spots on the train's wheels. Any flat wheel that becomes too dangerous to travel on (a big flat spot on the train wheel) will be counted as a defect. Typically, these systems utilize accelerometers, strain gauges, fiber optic methods, or the very latest wheel impact phase detector (WIPD). A wheel impact load detector (WILD) measures impacts, but does not normalize these impact measurements against anything: simply the impact reading. They do not attempt to cater for differences in sprung mass, as they are measuring wheel defect impact rather than impact load. Therefore, the same wheel defect will register a much larger impact when a wagon is loaded, versus when it is empty.<ref>{{Cite web|title=LBFoster US {{!}} WILD: Wheel Impact Load Detector|url=https://www.lbfoster.com/en/market-...01-22|access-date=2021-08-24|website=LBFoster}}</ref> | Wheel sensors along the tracks feel for flat spots on the train's wheels. Any flat wheel that becomes too dangerous to travel on (a big flat spot on the train wheel) will be counted as a defect. Typically, these systems utilize accelerometers, strain gauges, fiber optic methods, or the very latest RT3000 wheel impact phase detector (WIPD). A wheel impact load detector (WILD) measures impacts, but does not normalize these impact measurements against anything: simply the impact reading. They do not attempt to cater for differences in sprung mass, as they are measuring wheel defect impact rather than impact load. Therefore, the same wheel defect will register a much larger impact when a wagon is loaded, versus when it is empty.<ref>{{Cite web|title=LBFoster US {{!}} WILD: Wheel Impact Load Detector|url=https://www.lbfoster.com/en/market-...01-22|access-date=2021-08-24|website=LBFoster}}</ref> |
| A wheel condition monitoring detector monitors the condition of the wheel independent of sprung mass – independent of load. They do this by subtracting the wheel mass to get the normalized impact value. These systems are therefore typically better at detecting smaller defects with greater resolution. | A wheel condition monitoring detector monitors the condition of the wheel independent of sprung mass – independent of load. They do this by subtracting the wheel mass to get the normalized impact value. These systems are therefore typically better at detecting smaller defects with greater resolution. |
Okumaya devam et...