Patent ID: 6122571
Filing Date: 2000-09-19
Classification: A63G

Abstract:
A positive-feedback go/no-go control system for a railway electric-vehicle ride at an amusement park, the railway electric-vehicle ride including an outbus and an inbus running along the railway, the outbus and the inbus divided into a plurality of zones, the positive-feedback go/no-go control system comprising:a wayside control board for providing a bipolar pulse-width-modulated command signal with a negative voltage value and a positive voltage value of a first frequency to the outbus; anda control circuit, onboard the electric vehicle, including a shunt element, the control circuit for,receiving the bipolar pulse-width-modulated command signal provided to the outbus, andshunting the shunt element between the outbus and the inbus to provide a vehicle-presence signal that represents the presence of the electric vehicle in the zone that the electric vehicle is traveling along to the inbus;wherein the wayside control board,receives the vehicle-presence signal provided to the inbus, andcompares the vehicle-presence signal to a vehicle-presence threshold to detect the presence of the vehicle in the zone.