压力传感器非线性曲线拟合方法及不确定度分析

Nonlinear Fitting Method for Pressure Sensors and Uncertainty Analysis

压力传感器输入输出关系通常以线性拟合直线来表示,而实际输入输出关系并不是直线关系,本文用最小二乘法拟合压力传感器输入输出非线性方程,并给出不确定度分析,可以提高测量的准确度。

The relationship between input and output of pressure sensors is usually expressed through linear curve,but it is not a linear relationship. The least square method is used to simulate the nonlinearity of pressure sensors＇ input and output,and the methods for these uncertainty calculations and evaluations were derived to improve measure accuracy.