TRAIN DOOR DETECTING DEVICE

摘要

PURPOSE:To accurately detect the position of an opening/closing door of a train by detecting the distance from the prescribed position to the side face of the train, and judging the position of the detection point group between both change points where the distance information from both long and short detection points is changed respectively as the position of the opening/closing door. CONSTITUTION:A platform door system preventing the drop of passengers is installed on the platform of a station. A plurality of moving fences 11-14 are moved into or out of fixed fences 16a, 16b continued on both sides of a screen 17 according to the position of the opening/closing door 18a of a train 18 of various types. A plurality of ultrasonic heads 1-1, 1-n are driven and controlled by a logical section 3 via a ultrasonic transceiver section 2, and the distance from the prescribed position to the side face of the train 18 is detected. The logical section 3 judges that the train 18 is stopped when the position of the change point between detection points is not changed and judges the position of the detection point group between both change points where the distance information from both long and short detection points is changed respectively as the position of the opening/closing door.