| 自制偏光实验用微电流检流计 |
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| 引用本文： | 马跃进,连洁,王永胜,武振国.自制偏光实验用微电流检流计[J].山东教育学院学报,2011,26(3):24-28. |
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| 作者姓名： | 马跃进 连洁 王永胜 武振国 |
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| 作者单位： | 1. 山东大学信息科学与工程学院,山东济南,250100
2. 杭州士兰明芯科技有限公司,浙江杭州,310018 |
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| 摘 要： | 自制的偏光实验用微电流检流计主要是采用LF353运算放大器和二阶巴特沃斯低通滤波电路对信号进行放大,用AT89S52单片机作为控制芯片,由ICL7135模数转换芯片对放大后的信号进行数据采集,并通过4位数码管显示测量数据.微电流计的量程为0.1uA-0.1mA,放大倍数连续可调,而且还设置了数字清零功能,可以有效地排除环境影响.在＂偏振光的检测和马吕斯定律的验证＂实验中,进行了初步应用,实验数据表明该仪器具有较高的测量精度、良好的重复性和稳定性,可满足偏光检测类实验的要求.
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| 关 键 词： | 信号放大 AT89S52 模数转换 马吕斯定律 |
An Innovative Micro-current Galvanometer Used in Polarized Light Experiment |
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| Ma Yuejin,Lian Jie,Wang Yongsheng,Wu Zhenguo.An Innovative Micro-current Galvanometer Used in Polarized Light Experiment[J].Journal of Shandong Education Institute,2011,26(3):24-28. |
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| Authors: | Ma Yuejin Lian Jie Wang Yongsheng Wu Zhenguo |
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| Institution: | Ma Yuejin1 Lian Jie1 Wang Yongsheng2 Wu Zhenguo1(1.School of Information Science and Engineering,Shandong University,Jinan 250100,China,2.Hang Zhou Silan Azure Co,Ltd,Hangzhou 310018,China) |
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| Abstract: | The micro-current galvanometer used for polarized light experiment proposed in this paper mainly amplifies the signals to sample by a LF353 operational amplifier and a second order Butterworth low-pass filter circuit under the control of an AT89S52 microcontroller chip,and then,makes the data acquisition for the amplified signals using the ADC ICL7135 chip,followed by the measurement display though a 4-bit Digitron.The range of this galvanometer is 0.1uA-0.1mA and also its magnification is continuously adju... |
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| Keywords: | AT89S52 |
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