一种压力传感器动态数字滤波的实现方法

A Method for Dynamic digital filter Implementation of Pressure Sensors

本文运用高斯—牛顿法,根据压力传感器的响应曲线建立了传感器的动态模型。该方法可使拟合结果逼近无偏估计,从而提高拟合的精度。为提高传感器动态特性,采用零极点配置法根据动态模型设计了动态补偿数字滤波器。运用Altera提供的DSPBuilder开发工具从Simulink模型自动生成VHDL代码,并在FPGA上实现了3阶IIR的数字滤波器,通过仿真取得了较好的效果。

This article utilizes Gauss-Newton method, has established the sensor dynamic model according to the pressure sensor response curve. This method enable the fitting result to approach the unbiassed estimate,and enhance fitting precision. Dynamical compensator digital filter for Pressure sensor has been designed by zero-pole placement according to dynamic model Using DSP Builder which provided by Ahera has automatically produced the VHDL code from the Simulink model, has realized a 3 steps IIR filter on FPGA, and take the good effect through the simulation.