摘要
在分析材料物理性能测量原理的基础上,采用虚拟仪器技术对低温系统和测量仪表进行控制,搭建了材料电学性能和交流磁化率测量装置,使用LabVIEW程序进行信号采集、数据处理和实时显示,实现了测试的自动化和智能化。通过对已知材料物理性能的测量来校正测量系统,对测量误差产生的原因进行了分析,在LabVIEW程序中嵌入了误差校正子程序,实现了数据的精确测量。结果表明,设计的测量系统可以灵敏准确地对材料的电学性能和交流磁化率进行测量,电阻测量上限可以达到1011Ω,交流磁化率的测量可以精确地确定材料磁性转变的温度。
Based on the principle of materials physical properties measurement, this thesis sets up elec- trical property and ac susceptibility measurement systems by controlling a low temperature system and measurement instruments with Virtual instrument technology. In addition, it uses LabVIEW to carry out signal acquisition, data processing and results displaying automatically and intelligently. In order to test the system, this thesis performs some known material＇s electrical and magnetic properties measurements in the system. After analyzing the reason for false creation, it programs a LabVIEW program to correct the measurement results with the aim to improve the precision. The developed systems are sensitive and accu- rate so that it can be use it to measure resistance in the range up to 10^11Ω and transformation temperature of ac susceptibility.
出处
《浙江理工大学学报（自然科学版）》
2013年第1期65-70,共6页
Journal of Zhejiang Sci-Tech University(Natural Sciences)
基金
国家自然科学基金项目(60806045
51072182)
浙江省自然科学基金项目(Y1110519)
浙江省大学生科技创新活动计划(2012R406053)
关键词
电阻测量
交流磁化率测量
误差分析
虚拟仪器技术
resistance measurement
ac susceptibility
error analysis
virtual instrument technology
