光电效应实验教学系统
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摘要
在传统光电效应实验仪的基础上,研制了基于嵌入式工控机的PEC-NPEE型LED光电效应实验教学系统。该系统核心的硬件电路有LED光源驱动电路、数控可调偏压电路和数据采集电路,采用嵌入式工业计算机作为控制端,使用最新的静电计级芯片实现精确的光电流检测,使用单色LED作为光源,可以精确地设定LED的工作电流,从而精确地调整光强,可以定量地验证光电效应与强度相关的实验规律,可以进行更精确地测量普朗克常数、测量光电管的伏安特性以及测量光电管的光电响应特性等实验,使学生能够更深刻的把握光电效应的实验规律。
On the basis of traditional photoelectric effect experiment instruments, the PEC-NPEE LED photoelectric effect experiment teaching system based on the embedded industrial computer is developed. The core hardware circuits of the system include LED light source driver circuit, digital control adjustable bias circuit and data acquisition circuit. The embedded industrial computer is used as the control terminal and the latest electrometer chip is used to realize accurate photoelectric current detection. The monochrome LED is used as light source, and the working current of LED can be set accurately. Thus, the light intensity can be adjusted accurately, the experimental law of photoelectric effect related to intensity can be verified quantitatively, the Planck constant can be measured more accurately, and the experiments can be carried out to measure Planck constant more accurately, the volt-ampere characteristics of photovoltaic cells and the photoelectric response characteristics of photovoltaic cells, so that students can grasp the experimental law of photoelectric effect more deeply.
On the basis of traditional photoelectric effect experiment instruments, the PEC-NPEE LED photoelectric effect experiment teaching system based on the embedded industrial computer is developed. The core hardware circuits of the system include LED light source driver circuit, digital control adjustable bias circuit and data acquisition circuit. The embedded industrial computer is used as the control terminal and the latest electrometer chip is used to realize accurate photoelectric current detection. The monochrome LED is used as light source, and the working current of LED can be set accurately. Thus, the light intensity can be adjusted accurately, the experimental law of photoelectric effect related to intensity can be verified quantitatively, the Planck constant can be measured more accurately, and the experiments can be carried out to measure Planck constant more accurately, the volt-ampere characteristics of photovoltaic cells and the photoelectric response characteristics of photovoltaic cells, so that students can grasp the experimental law of photoelectric effect more deeply.
引文
[1] 龚斌,朱兆青,凌邦国.数字光电效应实验仪的设计[J].南通工学院学报(自然科学版),2004(3):23-24,28.
[2] 王林香.光电效应伏安特性实验改进研究[J].大学物理实验,2016(1):60-62.
[3] 李春密,李多,平澄,等.光电效应演示和普朗克常量测定仪[J].物理实验,2006(3):41-42,46.
[4] ZHONG Jiuming, LIU Hanjun.Optimal Design of High Power LED Driving Circuit[J]. Advanced Materials Research,2012, 1700(490):2555-2558.
[5] 贡瑞睿,葛红娟.色温可调的高功率LED恒流驱动电路设计[J].电力电子技术,2011(6):97-99.
[6] 钟龙平,马智杰,徐欣歌, 等.一种线性恒流的LED驱动电路设计[J].电子设计工程,2011(2):116-118.
[7] ZHANG R, CHUNG H S H. A Triac-Dimmable LED Lamp Driver With Wide Dimming Range[J].IEEE Transactions on Power Electronics,2014,29(3):1434-1446.
[8] 王增刚,苏淑靖,贾成伟.宽范围可调稳压电源的设计[J].自动化与仪表,2010(2):54-57.
[9] 潘方.RS232串口通信在PC机与单片机通信中的应用[J].现代电子技术,2012,35(13):69-71.
[10] SHI S H,WANG W F.Study on embedded optical sensor data collection and signal processing[J].Journal of Chemical and Pharmaceutical esearch,2014,6(6):2659-2667.
[11] 谢希,冯建勇.基于PIC单片机开发的高精度数据采集器[J].仪表技术,2005(1):53-54,57.
[12] 陈德山,孙寿龙.D/A转换器双极性输出的硬件设计与分析[J].德州学院学报(自然科学版),2004(6):59-62.
[13] 蒋萍花,张楠.数据采集系统串口通信的设计与实现[J].电子测量技术,2015(6):139-142.
[2] 王林香.光电效应伏安特性实验改进研究[J].大学物理实验,2016(1):60-62.
[3] 李春密,李多,平澄,等.光电效应演示和普朗克常量测定仪[J].物理实验,2006(3):41-42,46.
[4] ZHONG Jiuming, LIU Hanjun.Optimal Design of High Power LED Driving Circuit[J]. Advanced Materials Research,2012, 1700(490):2555-2558.
[5] 贡瑞睿,葛红娟.色温可调的高功率LED恒流驱动电路设计[J].电力电子技术,2011(6):97-99.
[6] 钟龙平,马智杰,徐欣歌, 等.一种线性恒流的LED驱动电路设计[J].电子设计工程,2011(2):116-118.
[7] ZHANG R, CHUNG H S H. A Triac-Dimmable LED Lamp Driver With Wide Dimming Range[J].IEEE Transactions on Power Electronics,2014,29(3):1434-1446.
[8] 王增刚,苏淑靖,贾成伟.宽范围可调稳压电源的设计[J].自动化与仪表,2010(2):54-57.
[9] 潘方.RS232串口通信在PC机与单片机通信中的应用[J].现代电子技术,2012,35(13):69-71.
[10] SHI S H,WANG W F.Study on embedded optical sensor data collection and signal processing[J].Journal of Chemical and Pharmaceutical esearch,2014,6(6):2659-2667.
[11] 谢希,冯建勇.基于PIC单片机开发的高精度数据采集器[J].仪表技术,2005(1):53-54,57.
[12] 陈德山,孙寿龙.D/A转换器双极性输出的硬件设计与分析[J].德州学院学报(自然科学版),2004(6):59-62.
[13] 蒋萍花,张楠.数据采集系统串口通信的设计与实现[J].电子测量技术,2015(6):139-142.