Wireless Sensing Based on RFID and Capacitive Technologies for Safety in Marble Industry Process Control

is paper presents wireless sensing systems to increase safety and robustness in industrial process control, particularly in industrial machines for marble slab working. e process is performed by abrasive or cutting heads activated independently by the machine controller when the slab, transported on a conveyer belt, is under them. Current slab detection systems are based on electromechanical or optical devices at the machine entrance stage, suffering from deterioration and from the harsh environment. Slab displacement or break inside the machine due to the working stress may result in safety issues and damages to the conveyer belt due to incorrect driving of the working tools. e experimented contactless sensing techniques are based on four RFID and two capacitive sensing technologies and on customized hardware/soware. e proposed solutions aim at overcoming some limitations of current state-of-the-art detection systems, allowing for reliable slab detection, outside and/or inside the machine, while maintaining low complexity and at the same time robustness to industrial harsh conditions. e proposed sensing devices may implement a wireless or wired sensor network feeding detection data to the machine controller. Data integrity check and process control algorithms have to be implemented for the safety and reliability of the overall industrial process.