【摘要】 为适应多道γ谱仪向便携式方向发展的需要,引入先进的FPGA数字集成电路技术,编制模数变换器逻辑的Verilog HDL程序,替换传统多道γ谱仪中复杂繁多的分立元器件,研制了新型便携式多道γ谱仪。谱仪研发中,引入FPGA技术,取代时序复杂的分立数字器件,增强了仪器的可维护性,更具适用性。测试表明:该谱仪微分非线性<2%,积分非线性<0.1%,可用于长时间野外测量。更多还原

【Abstract】 As an advanced digital integrated circuit technology,FPGA is introduced to meet the development needs of portable multi- channel gamma- ray spectrometer,and components of discrete complex in traditional multi- channel gamma- ray spectrometer is replaced by Verilog HDL program to achieve analog to digital converter. Then a new type of portable multi- channel gamma- ray spectrometer is developed. In the development of this spectrometer,FPGA technology is incorporated to replace the complex discrete digital timing devices,so the maintainability of the instrument is enhanced and it is more applicable. Experimentally measured: differential nonlinearity of this spectrometer is less than 2% and integral nonlinearity is less than 0. 1%. Also it is suitable for long- time field measurement.更多还原