东北师大学报(自然科学版)
東北師大學報(自然科學版)
동북사대학보(자연과학판)
JOURNAL OF NORTHEAST NORMAL UNIVERSITY(NATURAL SCIENCE EDITION)
2010年
1期
67-70
,共4页
FPGA%辐射定标%恒流源
FPGA%輻射定標%恆流源
FPGA%복사정표%항류원
FPGA%radiometric calibration%constant current source
提出了输出电流精密可调的辐射定标电源的实现方法.以FPGA为系统控制核心,完成键盘输入和输出电流、电压显示,利用D/A芯片来控制输出电流的大小,并采用了数字、模拟反馈电路与最小二乘法相结合的方法来实现输出电流的精密控制.该恒流源的输出电流范围为4～2 000 mA,步进为0.5 mA,能实时显示输出电流和电压值,输出电流与给定电流值的偏差范围为0.1%～0.25%,纹波电流小于0.2 mA,输出电压范围在0～12 V之间.
提齣瞭輸齣電流精密可調的輻射定標電源的實現方法.以FPGA為繫統控製覈心,完成鍵盤輸入和輸齣電流、電壓顯示,利用D/A芯片來控製輸齣電流的大小,併採用瞭數字、模擬反饋電路與最小二乘法相結閤的方法來實現輸齣電流的精密控製.該恆流源的輸齣電流範圍為4～2 000 mA,步進為0.5 mA,能實時顯示輸齣電流和電壓值,輸齣電流與給定電流值的偏差範圍為0.1%～0.25%,紋波電流小于0.2 mA,輸齣電壓範圍在0～12 V之間.
제출료수출전류정밀가조적복사정표전원적실현방법.이FPGA위계통공제핵심,완성건반수입화수출전류、전압현시,이용D/A심편래공제수출전류적대소,병채용료수자、모의반궤전로여최소이승법상결합적방법래실현수출전류적정밀공제.해항류원적수출전류범위위4～2 000 mA,보진위0.5 mA,능실시현시수출전류화전압치,수출전류여급정전류치적편차범위위0.1%～0.25%,문파전류소우0.2 mA,수출전압범위재0～12 V지간.
A method to realize radiometric calibration power supply of precision adjustable current is presented,combining digital,analog feedback circuit and least squares method .As the core of controlling system,FPGA manage keyboard entering,current,voltage display and the scale of the output current via D/A component.The current value of this constant current source ranges from 4 mA to 2 000 mA and its stepping is 0.5 mA.It can display the current and voltage value in realtime,and the output voltage range is 0 to 12 V.The deviation between output currents and preset currents is less than 0.25% and ripple currents are less than 0.2 mA.
