Implementation of a Safe Intrusion Detection System for Automated Door Applications Using a Safe System-on-Chip

Abstract

This paper proposes a systematic approach to design a safety-related intruder detection system for automated door operations for different areas of application. The implementation of the proposed safety control system according to IEC 61508 is addressed to accomplish the safety requirements of the intruder detection system. The redundancy schemes of the sensing elements and controller units with diagnostic capabilities are demonstrated in prototyping the safe operation of train doors. Different orientations of sensing elements are crucial for the detection of intruders with specific requirements. The control algorithm of the safety-related system is illustrated in form of a control flowchart. The timing diagrams elaborate results of different scenarios. The control efficiency of a safety system-on- chip as a controller to perform safety requirements is established with the help of a prototype. The prototype demonstrates high precision, safety, and reliability with the advantages of low cost and high added value.