新型放射性气溶胶在线监测仪设计  

Design of a New On-Line Monitor for Radioactive Aerosol

作　　者：李建伟[1] 马英豪[1] 孟丹[1] 杨屹[1] 畅祥 杜旭红[1] LI Jian-wei;MA Ying-hao;MENG Dan;YANG Yi;CHANG Xiang;DU Xu-hong(China Institute for Radiation Protection, Taiyuan 030006, China)

机构地区：[1]中国辐射防护研究院

出　　处：《核电子学与探测技术》2019年第1期5-9,共5页Nuclear Electronics & Detection Technology

摘　　要：采用传统工控机作为控制/处理器的放射性气溶胶在线监测仪体积大、集成度低,在恶劣环境下容易因计算机死机、系统故障等导致仪器运行中断,为此研制了一种新型放射性气溶胶在线连续监测仪。该仪器在以高性能ARM嵌入式系统为核心的硬件和软件环境下,较好地实现了α能谱平滑、寻峰、峰位校正,天然氨牡及其子体放射性气溶胶扣除等关键技术,有效地提高了仪器的运行可靠性和稳定性。对监测仪进行了超过72h的普通实验室环境的运行实验,测试结果表明:该仪器对a和B气溶胶的探测限分别为0.046Bq/cm^3和0.29Bq/cm^3。此外,通过相关试验对监测仪的准确性和稳定性进行了验证。The on-line monitoring instrument of radioactive aerosol using traditional industrial computer as control/processor has large volume and low integration. It is easy to interrupt the operation of the instrument due to computer crash and system failure and so on in severe environment. For this reason,α new on-line monitoring instrument for radioactive aerosol has been developed. Under the hardware and software environment with high performance ARM embedded system as the core, the key technologies such as smoothing of alpha spectrum, peak searching, peak position correction, deduction of natural radon thorium and its daughters' radioactive aerosol are well realized, and the operation reliability and stability of the instrument are effectively improved. The operation of the monitor in a general laboratory environment exceeding 72 h was carried out, the test results show that the detection limits of the instrument for alpha and beta aerosols are 0.046 Bq/cm^3 and 0.29 Bq/cm^3 respectively. In addition, the accuracy and stability of the monitor were verified through related tests.

关 键 词：嵌入式系统 放射性气溶胶 α能谱平滑 探测限 

分 类 号：TL817[核科学技术—核技术及应用]