基于三次样条函数的霍尔传感器的特性曲线拟合方法

介绍了霍尔传感器的优点和对其特性曲线进行拟合的必要性；对三次样条函数在霍尔传感器特性曲线拟合中的应用进行了理论分析，应用软件Matlab6．5结合实验数据对UGN3501U型传感器的UH—B曲线进行了拟合；给出了传感器拟合点减少的方案，这样，可以减少成本和工作量，但对相对误差影响不大。结果表明，原拟合的曲线与减少拟合点后的拟合曲线两者都很光滑、精度高且相对误差都很小，这种方法有很强的实用性和较高的理论价值。

Characteristic Curve Fitting of the Hall Sensor Based on Cubic Splines Function

The paper firstly introduces the superiority of the Hall sensor and the necessity of fitting to the characteristic curve of the Hall sensor. Then it theoretically analyzes the application of the cubic splines functions in the fitting of the Hall sensor characteristic curve. It experiments with synthetical data to fit the UH-B curve of UGN3501U sensor in software Matlab6. 5. And a scheme to re duce the fitting points is proposed which can cut down the cost and the worklod and has little effect to the relative errortoo. The experimental resluts illuminate that the fitting curve which reducing the fitting points with our method is also soomth and has high precision and little relative error in comparison with the original curve. As a result, the method we propose is more valuable in theory and has strong practicability at the same time.