压力变送器标定方法的研究

压力变送器指的是一种输出为标准化信号的压力传感器,其内部的信号调节芯片中用于保存调节信息的存储器默认存储值未知,因此压力变送器输入输出曲线未知,必须对压力变送器进行标定,将压力变送器输入输出曲线调整为标准输入输出曲线。因此本文研究了一种基于可编程增益放大器PGA308的电流输出型压力变送器压力的标定方法,该方法采用平均斜率法拟合压力变送器输出输出曲线,能够实现压力变送器的标定,标定精度能够达到0.0063%,标定速率能够达到9.9 s/个。

Research on calibration method of pressure transmitter

Pressure transmitter refers to a pressure sensor whose output is a standardized signal.The default memory value of the memory used to store the adjustment information in the internal signal conditioning chip is unknown,so the input and output curves of the pressure transmitter are unknown.The pressure transmitter must be calibrated to adjust the pressure transmitter input and output curves to standard input and output curves.Therefore,this paper studies a calibration method of the current output type pressure transmitter pressure based on the programmable gain amplifier PGA308.The method uses the average slope method to fit the pressure transmitter output output curve,which can realize the calibration of the pressure transmitter.The calibration accuracy can reach 0.0063%,and the calibration rate can reach 9.9 seconds/piece.