一种用于α粒子便携式探测装置的电路设计  

Circuit Design of An α Particle Portable Detector

作　　者：饶文燕 余桂英 宋柄含 

机构地区：[1]中国计量大学计量测试工程学院,浙江杭州310018 [2]中国计量大学光学与电子科技学院,浙江杭州310018

出　　处：《仪表技术与传感器》2017年第12期33-36,共4页Instrument Technique and Sensor

基　　金：国家自然科学基金青年基金项目(61605193)

摘　　要：文中以α粒子探测装置的便携性和稳定性为设计目标,设计了一种基于PIPS探测器的α粒子信号提取电路。用文氏桥振荡器和串联线性稳压电路构造探测器直流偏置电路,用LM3524芯片设计脉宽调制斩波电路输出高压腔的直流高压,并对PIPS探测器输出信号的处理电路和元件参数进行优化。实验表明,该电路系统的探测器和高压腔的驱动源的纹波系数分别为0.153%和0.111%,系统总功耗326.4 m W,体积为400 cm^3,同时,信号处理电路的信噪比达到了17.34 d B。所设计的电路系统具有较好的便携性和可靠的信号输出。For the aim of α-particle detection device＇s portability and stability,an α-particle signal extraction circuit based on PIPS detector was designed.The detector DC bias circuit was formed with Wien bridge oscillator and series linear voltage stabilizing circuit.Pulse width modulation chopper circuit was designed using LM3524 chip and acted as the high voltage source of chamber.And the PIPS detector output signal processing circuit and device＇s parameters were optimized.Through experiments,the driving sources of detector and high voltage chamber had smaller ripple actors with 0.153% and 0.111% respectively.Total power consumption was 326.4 m W and the bulk was 400 cm3 and noise-signal ratio of signal processing circuit was 17. 34 d B,which promised a better stability and portability of the designed electrical system.

关 键 词：α粒子探测 PIPS探测器 稳压偏置电源 辐射信号处理 便携性 文氏桥振荡器 

分 类 号：X591[环境科学与工程—环境工程]