Positive-feedback go/no-go communication system

摘要: A positive-feedback go/no-go control system for an electric-vehicle ride (10) at amusement park reliably communicates motion commands, vehicle-presence signals, and vehicle-status signals in the presence of high electrical noise does so without addition expensive add-on equipment. The railway includes outbus (16) inbus (18) running along a (14). comprises wayside board (22) that provides bipolar pulse-width-modulated command signal (26) to outbus. circuit (24) onboard electric vehicle receives signal, amplitude modulates it different frequencies represent vehicle's intended action, processed (30, 32) inbus. bandpass filters frequency components, compares filtered components predetermined thresholds detect action vehicle.