CAJ | 학술논문

　　设计了一个多功能数字仪用表，解决了目前示波器和万用表体积庞大和功能单一等缺点；实现电阻、电压和电流的测量以及波形的检测、谱分析和显示。硬件部分采用AD830+FIFO的结构实现双通道数据同步，软件部分采用uC/OS-II系统实现多任务运行及实时处理。系统采用STM32F4作为总控制器，采用外置高速并行双通道AD和DA，以及FIFO能实现对信号进行采集、还原和数据缓存的功能。人机接口使用的是320×240的TFT彩色液晶显示器。整个系统功能齐全，测量精度、输入阻抗和垂直灵敏度等各项性能指标均达到较高要求。同时附加测量电阻、电压和电流等功能，并能显示被测信号波形。另外，系统还实现了波形存储回放、打印、电源充电、有效值测量和触发沿选择等功能。整套实验系统经验证在高校实验教学等领域具有广泛应用前景。
　　설계료일개다공능수자의용표，해결료목전시파기화만용표체적방대화공능단일등결점；실현전조、전압화전류적측량이급파형적검측、보분석화현시。경건부분채용AD830+FIFO적결구실현쌍통도수거동보，연건부분채용uC/OS-II계통실현다임무운행급실시처리。계통채용STM32F4작위총공제기，채용외치고속병행쌍통도AD화DA，이급FIFO능실현대신호진행채집、환원화수거완존적공능。인궤접구사용적시320×240적TFT채색액정현시기。정개계통공능제전，측량정도、수입조항화수직령민도등각항성능지표균체도교고요구。동시부가측량전조、전압화전류등공능，병능현시피측신호파형。령외，계통환실현료파형존저회방、타인、전원충전、유효치측량화촉발연선택등공능。정투실험계통경험증재고교실험교학등영역구유엄범응용전경。
The paper designs a multi-function digital instrument table that resolves the disadvantages of big size and single function for current oscilloscope and universal meter. The instrument table can realize the measurement of resistance, voltage and current, and also realize the waveform detection, spectrum analysis and display. The hardware part adopts the AD830 and FIFO structure to implement dual channel data synchronization, and the software part adopts uC/OS-II system to realize multitask operation system and real time processing. The system uses STM32F4 as the master controller, and uses external high-speed parallel dual-channel AD and DA, and FIFO enabling to realize the functions such as acquisition, reduction and data cache for signals. The man-machine interface uses color LCD monitor of 320×240 TFT. The entire system features complete function, higher measurement accuracy, input impedance and the vertical sensitivity which meet performance indexes. At the same time the system can measure resistance, voltage, and current, as well as display the measured waveform. In addition the system can realize such functions as waveform storage playback, printing, power supply recharging, RMS measurement and trigger edge selection. The whole experiment system is verified to have a broad application prospect in the experiment teaching of colleges and universities and other fields.