DEVICE FOR DETECTING THE POSITIONS OF PIVOTABLE PARTS OF RAILWAY SWITCHES AND METHOD FOR EVALUATING THE SIGNALS OF SENSORS FOR DETECTING POSITION OF PIVOTABLE PARTS OF RAILWAY SWITCHES

摘要

The device uses at least one sensor (4,5,6,7) for detecting the position of the movable blade of the switch or tongue rail (1,2). The sensor is provided as a continuously operating distance monitor, coupled to an evaluation circuit (10) with microcontroller providing one output indicating the detected distance and another output for function control of the sensor, with safety relay (11). The device may have a number of sensors positioned in different measuring planes, with the sensor signals from the different measuring planes being compared to provide the function check.