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C8051F020 MCU在核谱测量系统中的应用研究
Applying of C8051F020 MCU in nuclear spectrum acquisition system
【摘要】 利用高性能的C 8051F 020单片机设计了一种核谱测量系统,系统与微机连接实现了谱数据的实时采集。直接利用C 8051F 020已经封装的一个12位的100kH z的逐次逼近型ADC,两路12位的电压型DAC中的一路,片上的4k字节XRAM,加上过峰检测电路构成多道分析系统。利用C 8051F 020上ADC 0的差分输入,一路为输入信号,一路为DAC 0的输出,实现滑尺,可以明显地改善测量谱仪的微分非线性。用N aI(T l)探测器的信号作测试,实测了137C s的谱图。
【Abstract】 This paper introduces applying of C8051F020 MCU and constructing nuclear spectrum acquisition system. Because C8051F020 has a 12bits 100kSPS successive ADC, and two 12 bits voltage DAC, 4kbytes XRAM ,it’s easy to construct a nuclear spectrum acquisition system with a peak detecting circuit .The ADC is programmed in differential mode ,and one DAC is used . DAC’s output is connected to the ADC’s negative input to make an eliminating differential nonlinearity error circuit .And the system is tested with a NaI(Tl) γ detector using ()137Cs.
【Key words】 smoothen saw teeth; nuclear spectrum collecting; C8051F020; differential nonlinearity; dead;
- 【文献出处】 核电子学与探测技术 ,Nuclear Electronics & Detection Technology , 编辑部邮箱 ,2005年05期
- 【分类号】TL81
- 【被引频次】16
- 【下载频次】132