The Design And Implementation Of Radioactive Source Monitoring System Based On GPRS

With social and economic development, the radioactive sources required by nuclear technology are widely applied in industry, agriculture, scientific research, medical and other fields, while the loss and theft of radioactive sources results in environmental pollution and personal injury. Therefore, studying how to monitor a wide range and a large number of radioactive sources in different situations will bring great social meaning and application value.In this paper, a radioactive source monitoring system based on GPRS technology is put forward. This system is a smart monitoring system with integrated application of sensor and automatic detecting technology, RFID technology, GPRS technology, network communication technology, database technology and computer control technology. Radiation dose detector is used to obtain the information of radiation dose and location, RFID reader reads the status of a tag fixed on the bottom of the radioactive source. Field monitoring data is transmitted to the remote monitoring center via GPRS. There will be an audible and visual alarm when radiation dose or the state of RFID tag is abnormal, and the monitoring center will send alarming text messages through GSM Modem at the same time. Thus, the functions of monitoring and alarming are achieved. The main content and innovation of this thesis are summarized as follows:1) GPRS technology was applied to radioactive source data communication 'system, which make full use of its low cost of connection, high transmission rate, fast access speed and good expansibility, solved the problem of monitoring data access for a large number and a wide range of radioactive sources;2) A data communication program based on IOCP mechanism is designed, which solved the problem of large concurrent data flows due to the massively increasing access point;3) Radioactive sources monitoring center software is developed and functions like data receiving, processing, displaying, saving, alarming messages sending, radioactive sources information sharing among environmental protection system and Web access to the information have been achieved.The system was already in use and is running well, which meets the requirements of radioactive pollution monitoring for environmental protection system. All in all, the system has improved the monitoring level and managing efficiency of environmental protection department.