Optical fibres integrated in structure as a safety element for pedestrians

This article discusses the use of fibre Bragg grating and Mach-Zehnder interferometer as a safety element for pedestrians. Such systems could complement existing technologies or replace them altogether. An advantage is the construction of the sensor probe without wires and metal parts along with long-distance interrogation possibility. Thanks to these features, the system is immune to electromagnetic interference, and its presence can be difficult to detect as well as affect its operation. This security system was tested on volunteers, and the results were analysed and evaluated. The first measurement was the stepping on the pad at the regular intervals. Then the system functionality has been verified with the stepping on the overlaid test pad. The last test was the ordinary walk of five volunteers over the test pad and their identification. The main task was to automatically detect all events and analyse volunteers gait in the frequency