摘要
采用交流电源激励,自制传感器探头,利用标准电阻定标,得到电导率与输出电压的关系,通过定标曲线,得到不同浓度NaCl溶液的电导率.通过测量探头的频率特性,得到输出电压随频率变化的曲线,选出最佳测量频率.
Using AC power incentive,the self-made sensor,and standard resistance used to calibrate,the relationship between the conductivity and the output voltage was obtained.The conductivity of NaCl solution with different concentration was gotten through the calibration curves.In addition,the dependence of output voltage on the frequency was obtained by measuring the frequency characteristics of probes,and therefore the best frequency could be singled out.
出处
《物理实验》
北大核心
2011年第3期8-10,17,共4页
Physics Experimentation
基金
华东师范大学大夏大学生科研基金资助(No.135)
关键词
电导率
传感器
非接触
conductivity
sensor
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