Design of a safety system for the entrance of accelerator shielding room

To further ensure the personal safety of staff in the irradiation processing, a photoelectric interlock system was designed for the trolley system in the maze entrance of irradiation accelerator. We designed the multipoint distribution combined system with 28 sets of photoelectric switch based on the specific structured of the trolley, it was set up in the entrance of the irradiation accelerator shielding room. And it will send alarming signal when nonspecific structured trolley or object is detected. It provides strong security and technical support for radiation hazards, chemical hazards, nuclear energy uses, etc. It has important guiding significance to the operation convenience and the safety of the devices. (authors)