Origin软件在研究RLC并联谐振电路的幅频特性曲线中的应用

The Application of Origin in Studyingthe Amplitude-frequency Curve of RLC Parallel Resonant Circuit

RLC并联谐振电路的幅频特性曲线数据测量繁琐,且人工绘图随机性大,不对称曲线数据读取难度大,导致实验误差大。利用Origin软件的绘图和分析功能读取谐振频率和计算品质因数,利用Origin软件的自定义非线性拟合功能得到具体的函数表达式,直接获取谐振频率和品质因数。结果表明,利用Origin软件进行数据处理不仅可以减小误差,还能简化实验。

In the experiment of studying the amplitude-frequency curve of RLC parallel resonant circuit, data measurement is complicated and manual drawing is random.The asymmetry of the curve also make it difficult to read date from the curve, which result in great error in the experiment. Reads the resonance frequency and quality factor calculation by the drawing and analysis function in Origin Software.The curve are fitted by user- defined nonlinear fitting function in Origin Software, and the function expression of amplitude-frequency curve directly access to the resonance frequency and quality factor. The results show that using Origin Software not only can reduce the error, can also simplify the experiment.