摘要
为对建材放射性进行检测,设计了基于光电倍增管的建材放射性脉冲检测及其能量刻度系统。系统包括光电倍增管检测、放射性脉冲调理电路及集成12位A/D的单片机MSP430F1612对放射性脉冲峰值的采样电路。该系统将单片机处理的数据通过RS232串口传送至上位机,上位机采用Visual Basic 6.0软件对数据进行滤波拟合寻峰,通过获得的能量分析了建材中含有的放射性元素及其能量范围。系统较精确地实现了能量的刻度、自动寻峰和手动寻峰等,能准确判断的能量范围为0.01～2.97 MeV。实现了现场对建材放射性的检测,具有很大的实用性和便携性。
In order to detect radioactive materials, the pulse detection of radioactive materials and energy calibration, are designed based on the photomultiplier. The system includes photomultiplier detector, the radioactive pulse conditioning circuit and the circuit of MCU MSP430F1612, which has 12-bit A/D inside, to sample the peak of radioactive pulse and so on. The data through the Single chip microcomputer dealing will be transmitted to PC through the RS232 serial port. The PC uses the Visual Basic 6. 0 software to filter and fit the data in order to search the peak. Analyzed the building materials have which radioactive element contained and it is energy range by the obtained energy. This system is much more accurate to achieve the energy scale, automatic and manual peak search, which could accurately determine the energy between 0. 01 to 2. 97 MeV. The system has realized the detection of radioactive materials on the scene.
出处
《吉林大学学报（信息科学版）》
CAS
2011年第3期271-277,共7页
Journal of Jilin University（Information Science Edition）
基金
吉林大学大学生创新实验计划基金资助项目(2011A65101)
关键词
光电倍增管
峰值采样
滤波拟合
能量刻度
photomuhiplier
peak sampling
filter fitting
energy calibration.
