基于MSP430的高精度压力计设计

Design of High-precision Pressure Gauge Based on MSP430

针对高精度测压的要求,提出一种基于MSP430F2013的高精度测压方案。利用单片机上20ppm电压基准和16位AD,辅助以非平衡电桥和过采样的方式,能够实现高精度的压力测量;通过BP神经网络智能化数据融合方法对压力传感器输出进行处理以消除非目标参量(温度)对传感器的影响。该方案具有测压精度高、功耗低、成本低的特点。

Aimed at the requirements for high-precision pressure measurement,a high-precision pressure measurement program was presented based on MSP430F2013.High-precision pressure measurement could be achieved with the on-chip 20 ppm voltage reference and 16 bit ADC.Using nonequilibrium bridge,over-sampling method and BP neural network intelligent data fusion method for handling the pressure sensor output to eliminate non-target parameter（temperature） effect on the sensor.This design has the feature of high-precision,low power consumption and low cost.