Patent ID: 6031790
Filing Date: 2000-02-29
Classification: B61L,G01H,G01V,G10K

Abstract:
An information generating apparatus using elastic waves, which employs at least one rail of a train as a transmission medium, comprising:elastic wave transmitting means for transmitting elastic waves to said at least one rail;elastic wave receiving means for receiving elastic waves transmitted from said elastic wave transmitting means through said at least one rail; andinformation generating means for generating information that is necessary for controlling/monitoring associated elements of a control system for performing control operations on said train, based on an elastic wave reception signal received by said elastic wave receiving means,wherein said information generating means includes propagation time measuring means for measuring an elastic wave propagation time during which an elastic wave propagates between the train and a railroad crossing positioned along the rail, distance computing means for computing a distance between the train and the railroad crossing based on the measured propagation time, speed computing means for computing the speed of the train, and control means for controlling timing, with which railroad crossing traversing inhibition command information is generated.