Patent ID: 7195211

Claim:
An electronically controlled grade crossing gate system, comprising: a gate arm; a gate arm moving assembly configured to move said gate arm; a position sensor assembly configured to continuously sense a position of said gate arm; wherein said position sensor assembly is a non-contact position sensor assembly comprising a gear position sensor configured to measure an angular displacement of a gear assembly, a shaft position sensor configured to measure a rotation of a shaft of the gear assembly, a shaft reference position sensor configured to measure a movement of the shaft in relation to a stationary reference, and a tip position sensor coupled to a tip of said gate arm and configured to indicate a predetermined orientation mode of said gate arm; and a controller coupled to said gate arm moving assembly and said position sensor assembly, wherein said controller is configured to receive an incoming command related to said position of said gate arm, activate said gate arm moving assembly in response to said incoming command and communicate with said position sensor assembly to monitor said position of said gate arm.