Research On Dynamic Monitoring And Control System Of Radiation Sources In Shenzhen

Radiation sources have many important applications in various fields. Nowadays, the total amount of radiation sources in Shenzhen has reached about 2900. The wide use of radiation sources in many fields has produed great hidden perils, which draws more and more attention. In order to avoid radiation accident and alleviate its influence to our environment and society, we need to establish a system which can monitor and control radiation sources in a scientific and effective way. There are mainly two types of the systems: one is called portable system, the other is called fixed system. The former is more flexible, and can be moved along with the radiation sources. It can also monitor and control radiation sources around the clock and provide updated information. The latter is more sensible, and can monitor and control a certain area. But it is more costly and the area it can monitor and control is quite limited.According to the different monitoring and control information, there are different types of portable systems. Today in our country, the common way of monitoring and control is to install a GPS on the radiation source. The GPS shows the exact location of the radiation source. In comparision, the dynamic monitoring and control system of radiation sources in Shenzhen install both a GPS and a radiation detector at the terminal. It can show both the location and the dose of the radiation sources.This paper mainly talks about the design and practice of the dynamic monitoring and control system of radiation sources in Shenzhen. The research is based on the analysis of relavent research abroad as well as the application of radiation sources in Shenzhen. The system mainly consists of radiation detector, GPS, GPRS terminal monitoring and control equipments, the Internet and the monitoring and control center. In the process of design and research, equipments like GPRS and GPS are used. Related programs were also written according to the requirments of software environment.The main functions of the terminal in dynamic monitoring and control system of radiation sources in Shenzhen are as follows: To collect the dose ofγradiation rate and the location information of GPS, transfer the monitoring and control data to the GPRS/GSM net through GPRS wireless telecommunication, then the GPRS/GSM net connects to the Internet and sends the data to the monitoring and control center, showing the geographic information of the radication source and the dose level on the electronic map at the monitoring and control center. People can read the data or adjust parameters through the net of the monitoring and control terminal at the monitoring and control center.The dynamic monitoring and control system of radiation sources in Shenzhen has the advantages of strong adaptability and stability. It can monitor and control the location and situation of radiation sources at the same time, which set a precedent in our country. The system performs well in practice, and can realize on-the-spot, long-distance monitoring and control of radiation sources.