Siemens Mobility Gmbh

David Cowen

Jeffrey Smith

A sensor unit for detecting the approach of a train, the sensor unit having first and second non-rail-mounted sensors, wherein the non-rail-mounted sensors are different from one another. A first control unit, itself having first and second non-rail-mounted sensors, wherein the non-rail-mounted sensors are different from one another in that they work on different physical principles, wherein the first sensor unit and first control unit are arranged to cooperate with one another to detect the approach of a train.

Sensor unit for detecting the approach of a train and system with said sensor unit

A monitoring system for a light emitting diode (LED) signal () includes optical detectors () for measuring a light output of LEDs (), a first processing unit () in communication with the plurality of optical detectors () and configured to receive and process measurement data of the light output from the plurality of optical detectors (), and a first switching element () operably coupled to the first processing unit (). The first processing unit () is further configured to transmit a control signal based on the measurement data of the light output of the plurality of LEDs () to the first switching element () to disconnect a reference load () by switching from a first state to a second state when the light output is less than a predefined threshold value, wherein the second state of the first switching element () is stored in a storage medium ().

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Chippenham, United Kingdom

David Cowen