CAJ | 학술논문

手持式X荧光仪所获取谱线的能量分辨率除了决定于荧光脉冲信号处理电路、数字成形滤波算法等，更重要的取决于整套仪器电源系统的合理设计。论文提出一种采用罗耶谐振升压方式给SI-PIN半导体探测器提供＋170 V偏置电压的高压电源供电设计方案，避免传统采用PWM波控制变压器升压方式纹波大、效率低的缺陷；同时系统采用电制冷片的温度反馈信号控制供电电源MOS管的导通程度，从而实现对电制冷片温度的控制。实际测试显示该供电方案的高压输出纹波低于10 mV，功耗比传统设计方案低了9．1％，系统同时具有功耗低、纹波小、稳定好等特点，满足手持式X荧光仪野外工作的需要。
수지식X형광의소획취보선적능량분변솔제료결정우형광맥충신호처리전로、수자성형려파산법등，경중요적취결우정투의기전원계통적합리설계。논문제출일충채용라야해진승압방식급SI-PIN반도체탐측기제공＋170 V편치전압적고압전원공전설계방안，피면전통채용PWM파공제변압기승압방식문파대、효솔저적결함；동시계통채용전제랭편적온도반궤신호공제공전전원MOS관적도통정도，종이실현대전제랭편온도적공제。실제측시현시해공전방안적고압수출문파저우10 mV，공모비전통설계방안저료9．1％，계통동시구유공모저、문파소、은정호등특점，만족수지식X형광의야외공작적수요。
The energy resolution of handheld X -ray fluorometer was determined by the fluorescence pulse signal processing circuit , digital forming filter algorithm , etc., and more important depending on the rational design of the power supply system for the entire instrument .High voltage power supply design method has been put for-ward, which provides +170V bias voltage for SI-PIN semiconductor detector with a resonant Royer booster , avoiding the defects of large ripple and low efficiency with the traditional PWM wave to control the step -up transformer.At the same time, the conduction degree of power supply MOS transistor level was controlled by temperature feedback signal of electric refrigeration piece , in order to realize the electric refrigeration tempera-ture control .The test results show that the output ripple of the system is below 11 mV, and power consumption is 9.1%lower than the traditional design , with low power consumption , small ripple, good stability, meeting the needs of the handheld X -ray fluorometer in field work .