“自制四端低值电阻”开放实验教学的实践
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摘要
将自制四端低值电阻的标定用于开放实验中,不仅可提高学生综合使用实验仪器及动手的能力,还可加深学生对测量不确定度理论知识的理解。实验中让学生自主选择制作材料、实验器材、设计实验电路、确定实验方法。用非等精度测量法测量自制四端低值电阻。应用测量不确定度理论,采用加权平均法,给出测量结果的不确定度。开放模式的实验教学设备利用率高、实验效果好,有利于培养学生的实践和创新能力。
The calibration of the"Four-terminal low-value resistor"is used in the open experiment,which can not only improve the students' comprehensive use of experimental instruments and their hands-on ability,but also deepen their understanding of the theoretical knowledge of measurement uncertainty.In the experiment,the students are allowed to choose the materials and experimental equipment,design the experimental circuit,and determine the experimental methods by themselves.The unequal precision measurement is used to measure the"Self-made four-terminal low value resistor".The uncertainty theory of measurement and the weighted average method are applied to obtain the uncertainty of the measurement results.The experimental teaching equipment with the open mode has the high utilization ratio and the good experimental effect,which is beneficial for training the students' practical and innovative ability.
The calibration of the"Four-terminal low-value resistor"is used in the open experiment,which can not only improve the students' comprehensive use of experimental instruments and their hands-on ability,but also deepen their understanding of the theoretical knowledge of measurement uncertainty.In the experiment,the students are allowed to choose the materials and experimental equipment,design the experimental circuit,and determine the experimental methods by themselves.The unequal precision measurement is used to measure the"Self-made four-terminal low value resistor".The uncertainty theory of measurement and the weighted average method are applied to obtain the uncertainty of the measurement results.The experimental teaching equipment with the open mode has the high utilization ratio and the good experimental effect,which is beneficial for training the students' practical and innovative ability.
引文
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[7]李瑞坚,蔡小宏.标准电阻自动检定装置测量值的不确定度评定[J].计量与测试技术,2014(8):85-87.
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[10]谭波,龙燕,唐桂兰,等.源表法检定标准电阻[J].计测技术,2010(6):32-34.
[11]曹智,罗敏,于灵.直流标准电阻器(0.005级及以下)校准结果测量不确定度评定[J].计量与测试技术,2013(9):95-96.
[12]周珺,王婷.工科物理实验教程[M].北京:高等教育出版社,2013.
[13]杭州大华仪器制造有限公司.DHQJ-3型非平衡电桥使用说明书[Z].
[2]邓晓燕,冯太合,孙宗海,等.“过程控制仪表与装置”实验教学改革与实践[J].自动化与仪器仪表,2015(9):151-152.
[3]毛有武,余晓武,谢明立,等.材料工程开放模式实验教学与实践[J].实验室研究与探索,2011,30(9):245-247.
[4]谢响明.直流标准电阻器的联接方法及分析计算[J].装备制造技术,2010(7):56-57.
[5]林骐.低阻值四端钮直流标准电阻器的并联和计算[J].电测与仪表,1998(10):25-26.
[6]路润喜,刘燕虹,李继东,等.低温度,等系数标准电阻器的研制[J].仪器仪表学报,2007(增刊1):388-391.
[7]李瑞坚,蔡小宏.标准电阻自动检定装置测量值的不确定度评定[J].计量与测试技术,2014(8):85-87.
[8]夏燕芬.标准电阻测量结果不确定度分析报告[J].工业计量,2012(增刊1):238-240.
[9]谭波.小阻值标准电阻的数字化检定[J].计量技术,2006(2):41-43.
[10]谭波,龙燕,唐桂兰,等.源表法检定标准电阻[J].计测技术,2010(6):32-34.
[11]曹智,罗敏,于灵.直流标准电阻器(0.005级及以下)校准结果测量不确定度评定[J].计量与测试技术,2013(9):95-96.
[12]周珺,王婷.工科物理实验教程[M].北京:高等教育出版社,2013.
[13]杭州大华仪器制造有限公司.DHQJ-3型非平衡电桥使用说明书[Z].