CAJ | 학술논문

为了测试电子显微镜高稳定线圈恒流电源的稳定度，设计了一种基于虚拟仪器技术的在线测试系统。该系统硬件平台基于GPIB总线，以8位半数字多用表为高精度电压采集设备，软件系统以LabVIEW为开发平台，可以实时采集处理线圈电流反馈的电压信号。应用该系统测试了稳定度为2 ppm/min的物镜线圈电源。结果表明，该测试系统精度高，反应快，使用方便，满足自动测试高稳定电源的需求。
위료측시전자현미경고은정선권항류전원적은정도，설계료일충기우허의의기기술적재선측시계통。해계통경건평태기우GPIB총선，이8위반수자다용표위고정도전압채집설비，연건계통이LabVIEW위개발평태，가이실시채집처리선권전류반궤적전압신호。응용해계통측시료은정도위2 ppm/min적물경선권전원。결과표명，해측시계통정도고，반응쾌，사용방편，만족자동측시고은정전원적수구。
To test the stability of high-stable constant current power supply of electronic microscope,an online testing sys-tem based on the virtual instrument technology was designed. The hardware platform of the system is based on GPIB. 8 12 bit digi-tal multimeter is taken as the high-accuracy voltage acquisition instrument. The software system was developed with LabVIEW. This system can collect and analyze the voltage signal fed backed from coil current in real time. The objective coil power supply with 2 ppm/min stability was tested. The tested esults show that the system has high accuracy and fast response,is to use,and can satisfy the demand of measuring high-stable power supplies automatically.