Railroad crossing object detection systems and methods include radar sensors detecting object presence, speed and heading in a different manner. A controller compares signal outputs from the different sensors to provide traffic control preemption signals and self-diagnose sensor problems. The sensor devices may include an ultra-wideband (UWB) impulse radar device and at least one reflective device providing failsafe object presence detection and object non-presence detection in redundant fashion with at least a second sensor device such as a side-fired radar device.
Redundant, self-deterministic, failsafe sensor systems and methods for railroad crossing and adjacent signalized intersection vehicular traffic control preemption
2021-04-06
Patent
Electronic Resource
English
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