【作者】 罗平生； 王亦春； 王晓莉； 徐华；

【Author】 Luo Pingsheng1 Wang Yichun2 Wang Xiaoli1 Xu Hua2(1.Department of Materials Physics,Xi’an Jiaotong University,Xi’an 710049,China;2.Institute of Theory Lubrication and Bearing Technique,Xi’an Jiaotong University,Xi’an 710049,China)

【机构】 西安交通大学理学院材料物理系； 西安交通大学机械学院润滑理论与轴承研究所；

【摘要】 针对Sawyer-Tower电路在低频下测量电滞回线时受到采样电容漏导的影响,本文通过分析流过铁电材料的电流,选择电流采样法测量电路,并提出一种补偿电滞回线的有效简便方法。结合虚拟仪器思想,组建以NI公司的LabVIEW和数据采集卡为核心的软硬件平台测试系统,利用其强大的数值处理能力和完善的端口配置函数,实现更加方便地完成铁电体真实电滞回线的准确测量。更多还原

【Abstract】 An alternative method to obtain hysteresis loops for ferroelectric materials was presented.In this method,the response electric current through the sample was collected via a linear resistor in series with the sample.Compensation of the contribution from leakage currents was performed by a software method.The measurement system was achieved based on LabVIEW and NI PCI-6221.The strong numerical treatment ability and perfect port configuration function of LabVIEW make the measurement convenient and accurate.更多还原