The Research And Design Of Positioning Function In Radioactive Source’s Anti-Theft System

With the rapid development of modern economic society, radioactive sources used in all walks of life will be more extensive. However, the lost or stolen of radioactive will bring varying degrees of damage to environment and human body. Therefore, how to regulate radioactive sources as well as the fastest in the loss making position feedback is very important social significance and application value.According to sources related to the use of the environment as well as technical requirements, this paper presents a multi-source location information acquisition function of radioactive tracer anti-theft system design based on embedded and BDS/GPS. The system based on embedded technology, relying on BDS/GPS sensor, GMS/GPRS sensor and MPU-6050 digital sensors, from multiple levels to locate radioactive sources. Thesis focused on the positioning function of radioactive source. Hardware design, the program is using NXP’s LPC4337 processor as the MCU unit, using dual-mode chip micro-branches ATGM331C as BDS / GPS positioning chip, using SIM900 as the core communications chips and using MPU-6050 digital gyroscope to achieve indoor local micro-positioning function. Software design, the program is using Keil-uVision4 as the development platform.The designed information acquisition function module in the radioactive tracer anti-theft system operates steady, achieving the requirements, which positioning accuracy of 8m, speed accuracy is 0.1m/s. Theoretical research and equipment development practice shows: tracing information based on embedded technology acquisition function module design evenly distribute the load to meet the needs of real-time and portability; in the satellite positioning, the base station location and the sources of their own micro-positioning, the three technology can ensure that the system’s high-speed, precision and high stability.