Portable Alarm Scanner for Railroad Train Scanning of Differential GPS with GIS System

PURPOSE: A portable train approach warning device is provided to allow workers to perform track maintenance in a safe manner by improving accuracy of reception of signal transmitted from the satellite. CONSTITUTION: A portable train approach warning device comprises a data collector for storing a train information and a track information to a compact flash memory; a transmitter combined with a global positioning system using a satellite, and which compares information regarding the current position of the train with a train's path to go, corrects error and transmits train data at a predetermined time interval through a radio system; and a portable receiver including a KBD for management of the receiver, an LCD for state checking, a global positioning system for obtaining information regarding the current position of the train, a receiver for receiving worker's data stored in a receiver CF and the information transmitted from the neighbor train, a controller, and an alarm operating in a specific condition.