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AD5933测量水电导率电路设计中的若干问题
资料介绍
研究了基于阻抗测试芯片AD5933的水电导率测试方法。涉及的问题包括测量频率的向下扩展和测量频率点的选择;消除激励信号中的直流分量以削弱极化效应;外加驱动降低激励阻抗对测试精度的影响;扫频区间两端点校准AD5933的输出幅度和相移。最后给出了一些实验数据。结果表明该方法电路简单,测量准确,而且集成度高,性能稳定可靠。
This paper researched on a water conductivity method based on AD5933.The issues involved were to extend measurement frequency downward,to choose the measurement frequency,to eliminate the DC component reducing polarization effect,to design driver reducing the influence of incentive-impedance.And two-end-points method calibrated the amplitude and phase of AD5933.Finally,it showed some experimental data.The experimental results show this design is simple,accurate and high integrated,and the performance is stable.
部分文件列表
| 文件名 | 大小 |
| AD5933测量水电导率电路设计中的若干问题.pdf | 237K |
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