电源系统是兰州重离子加速器(Heavy Ion Research Facility in Lanzhou,HIRFL)装置中的重要系统组成之一,成千上百台电源输出电流的稳定性与精确性直接影响束流的品质。为了保证HIRFL束流的准确性和一致性,需要对分布在主环、实验环上10...电源系统是兰州重离子加速器(Heavy Ion Research Facility in Lanzhou,HIRFL)装置中的重要系统组成之一,成千上百台电源输出电流的稳定性与精确性直接影响束流的品质。为了保证HIRFL束流的准确性和一致性,需要对分布在主环、实验环上100余台高精度数字化脉冲电源进行标定校准。本文主要介绍了一种高精度数字化电源脉冲标定系统的硬件组成、软件架构、标定算法以及数据处理方法,给出了标定结果。实际标定结果显示,标定之后的标准输出电流值精度提高了一个数量级,回读值精度提高了两个数量级以上,表明该方法能够有效地提高HIRFL高精度数字化脉冲电源的输出电流精度和回读精度。展开更多
为了能够对多种混合气体进行精确的识别和浓度测量,根据被检测气体的红外光谱的吸收特性,利用阵列式量子级联激光器设计了高精度的气体检测仪。在激光器驱动电源的设计上采用了时分复用的方法,通过高速脉冲控制和分段拟合的方法实现了...为了能够对多种混合气体进行精确的识别和浓度测量,根据被检测气体的红外光谱的吸收特性,利用阵列式量子级联激光器设计了高精度的气体检测仪。在激光器驱动电源的设计上采用了时分复用的方法,通过高速脉冲控制和分段拟合的方法实现了对电源输出的精准控制。同时,对红外探测器输出的微弱信号进行处理,大大提高了测量精度。测试结果表明:驱动电流的最大偏差仅为0.65 m A,稳定度优于4×10-5A,并对4种气体在10个浓度等级上进行了测试,最大平均测量误差仅为0.80%。展开更多
An improved high-resolution current-mode sorter is presented.Its structure complexity is O(N),which is crucial to the expansion of its size,and its dynamic range is large.Only one clock signal and one reset signal are...An improved high-resolution current-mode sorter is presented.Its structure complexity is O(N),which is crucial to the expansion of its size,and its dynamic range is large.Only one clock signal and one reset signal are needed.No biasing signal is required.The operation point is constructed according to the input current,so it is self-adaptive,which is very important for an all-purpose component.In average value circuit,subtraction circuit,Winner-Take-All(WTA) circuit and control circuit,it has good performance even at a large input current.This sorter has high precision,high resolution and low power,as has been proved via HSPICE simulation.It can be implemented in the standard digital CMOS technology and widely used in many fields,so it is of great value in applications.展开更多
文摘电源系统是兰州重离子加速器(Heavy Ion Research Facility in Lanzhou,HIRFL)装置中的重要系统组成之一,成千上百台电源输出电流的稳定性与精确性直接影响束流的品质。为了保证HIRFL束流的准确性和一致性,需要对分布在主环、实验环上100余台高精度数字化脉冲电源进行标定校准。本文主要介绍了一种高精度数字化电源脉冲标定系统的硬件组成、软件架构、标定算法以及数据处理方法,给出了标定结果。实际标定结果显示,标定之后的标准输出电流值精度提高了一个数量级,回读值精度提高了两个数量级以上,表明该方法能够有效地提高HIRFL高精度数字化脉冲电源的输出电流精度和回读精度。
文摘为了能够对多种混合气体进行精确的识别和浓度测量,根据被检测气体的红外光谱的吸收特性,利用阵列式量子级联激光器设计了高精度的气体检测仪。在激光器驱动电源的设计上采用了时分复用的方法,通过高速脉冲控制和分段拟合的方法实现了对电源输出的精准控制。同时,对红外探测器输出的微弱信号进行处理,大大提高了测量精度。测试结果表明:驱动电流的最大偏差仅为0.65 m A,稳定度优于4×10-5A,并对4种气体在10个浓度等级上进行了测试,最大平均测量误差仅为0.80%。
文摘An improved high-resolution current-mode sorter is presented.Its structure complexity is O(N),which is crucial to the expansion of its size,and its dynamic range is large.Only one clock signal and one reset signal are needed.No biasing signal is required.The operation point is constructed according to the input current,so it is self-adaptive,which is very important for an all-purpose component.In average value circuit,subtraction circuit,Winner-Take-All(WTA) circuit and control circuit,it has good performance even at a large input current.This sorter has high precision,high resolution and low power,as has been proved via HSPICE simulation.It can be implemented in the standard digital CMOS technology and widely used in many fields,so it is of great value in applications.
