摘要
介绍了一种采用应变片、铂电阻、光敏电阻、磁敏电阻四种电阻型传感器来测量压力、温度、照度、磁场的物理演示教学仪器,可以定量地演示出压力和应变片电阻值、温度和铂电阻阻值、照度和光敏电阻阻值、磁场强度和磁敏电阻阻值之间的关系及给出电阻阻值与对应的物理量之间的曲线。介绍了演示仪器的检测原理和结构,该仪器用于本科生教学,可以使学生将物理学理论与工程实际应用有机结合起来,了解不同属性外场,引起电阻值的变化。拓展出形变、照度、温度、磁场检测等在工程技术中的应用。
This essay introduced a physical demonstration teaching instrument,which uses the strain gauge,platinum resistance,photosensitive resistance,and magnetic resistance four resistance types of sensors to detect the pressure,temperature,illumination and magnetic field.It can quantitatively demonstrate the relationships between pressure and strain gauge resistance value,temperature and platinum resistance value,illumination and photosensitive resistance value,intensity of magnetic field and magnetic resistance value,and draw the curve of resistance value and the corresponding physical quantity.And it introduced the detection principle and structure of demonstration instrument.This instrument is for undergraduate teaching.It can help the students combine with the physics principle and practical engineering application,and understand the change of resistance value caused by the different attribute outfields,and the engineering applications of deformation,illumination,temperature and magnetic field.
出处
《大学物理实验》
2013年第1期46-48,共3页
Physical Experiment of College
关键词
电阻型传感器
物理原理
演示教学仪器
研制
resistance sensor
physical principle
demonstration teaching instrument
development
