|
|||||
|
|
| 数字技术在航空伽马能谱仪中的应用 | |
| 引用本文： | 曾国强,葛良全,熊盛青,倪卫冲,赖万昌.数字技术在航空伽马能谱仪中的应用[J].物探与化探,2010,34(2). |
| 作者姓名： | 曾国强 葛良全 熊盛青 倪卫冲 赖万昌 |
| 作者单位： | 1. 成都理工大学,核技术与自动化工程学院,四川,成都,610051 2. 中国国土资源航空物探遥感中心,北京,100083 3. 核工业航测遥感中心,河北,石家庄,050002 |
| 基金项目： | 国家863计划重大项目 |
| 摘 要： | 基于峰值采样保持的模拟能谱仪无法满足大尺寸多晶体高计数率的航空能谱测量。本系统采用了Y/U双通道数控增益放大器实现了谱漂的双16位分辨率调节范围,通过高速ADC与CPLD实现数字化能谱仪,在CPLD内部用VHDL语言编程实现基线恢复与峰高数据采集,保证了能量分辨率。结果表明:计数最大通过率大于100k/s,1 024道分辨率137Cs峰谱漂±1道,能量起始阈20 keV。实验证明本系统功耗低,性能可靠,体积小,可应用于航空能谱测量的场合。 |
| 关 键 词： | 航空能谱仪 数字能谱仪 数控增益放大 基线恢复 |
THE APPLICATION OF DIGITAL SPECTROSCOPIC TECHNIQUE TO AIRBORNE GAMMA-RAY INVESTIGATION |
|
| ZENG Guo-qiang,GE Liang-quan,XIONG Sheng-qing,NI Wei-chong,LAI Wan-chang.THE APPLICATION OF DIGITAL SPECTROSCOPIC TECHNIQUE TO AIRBORNE GAMMA-RAY INVESTIGATION[J].Geophysical and Geochemical Exploration,2010,34(2). | |
| Authors: | ZENG Guo-qiang GE Liang-quan XIONG Sheng-qing NI Wei-chong LAI Wan-chang |
| Institution: | ZENG Guo-qiang1,GE Liang-quan1,XIONG Sheng-qing2,NI Wei-chong3,LAI Wan-chang1(1.College of Applied Nuclear Technology , Automation Engineering,Chengdu University of Technology,Chengdu 610051,China,2.China Aero Geophysical Survey , Remote Sensing Center for L, , Resources,Beijing 100083,3.Airborne Survey , Remote Sensing Center of Nuclear Industry,Shijiazhuang 050002,China) |
| Abstract: | Analog spectroscopy based on peak sampling and holding circuit can't realize the airborne spectral measurement that uses several large size NaI(Tl) crystals This system makes use of Y/U double channel digital controlled gain amplifier to adjust the spectral drift. The designed digital spectroscopy uses high speed ADC and CPLD to complete baseline restore and peak height acquisition, thus improving the energy resolution. With this method, the maximum pulse through output rate is 100 k/s, the spectral drift is ±1 channel, and the start energy is less than 20 keV. This system has low power dissipation, small volume and high reliability. It can be used to perform airborne spectra measurement. |
| Keywords: | airborne spectroscopic investigation digital controlled gain amplifier digital gamma-ray spectroscopy baseline restore |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |