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Rail car braking systems depend upon the operational integrity of the coupling hoses that connect air pipes. By design, if a coupling hose fails or becomes otherwise uncoupled, a moving train is put into an emergency braking condition. Unintentional de-coupling can and does occur due to low-lying hoses hitting obstructions in the roadbed. At a minimum, the resulting emergency stop causes delays, but may also damage wheels by creating flat spots and damage lading.
Although mechanically-based wayside detectors exist to monitor for low-lying hoses, they are plagued with reliability problems and often false alarms. Salient's solution to this problem incorporates a non-contact, optical sensing approach. This system capitalizes on our extensive wayside experience, using a light curtain sensor to examine only the appropriate area between vehicles to minimize the possibility of false alarms. Like all of our systems, the Low Hose Detector integrates AEI tag readers to provide a complete record of offending vehicles, so corrective action can be taken by the train crew or maintenance personnel at the most convenient location.
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