一种新型分体式差压测量装置的研制

为了减少由传统的差压测量装置中引压装置带来的不确定度,设计了一种新的分体式差压测量装置。从不确定度的角度出发,对测量装置的模型进行分析,采用扩散硅压力传感器探头作为测压元件,使用MSP430F149单片机作为控制数据转换、处理和显示的中央芯片,并确定了分体式差压测量装置的最优测量方案。通过大量的实验确定了压力和差压测量的数学模型。最终的差压测量实验表明:通过对电压数值的修正,差压测量的引用误差达到了5‰,证明该装置的测量原理和方法是可行的。

Research on split-type differential pressure measurement device based on MSP430F149

In order to reduce measurement uncertainty caused by the impulse tube in the traditional differential pressure measurement device,a new split-type differential pressure measuring device was designed in this paper.Starting from the point of measurement uncertainty analysis,the model of the measurement device with diffused silicon pressure sensor as a load cell was analyzed.This design used MSP430F149 microcontroller to convert,process and display data and determined the most optimal split measurement solution for differential pressure measurement device.The mathematical model of differential pressure measurement in this device was confirmed by a good deal of experiments.The measurement results show that through the modification of voltage the fiducial error of differential pressure is limited in 5‰.and prove that the measurement principle and method of the device is feasible.