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JJG370-2007《在线振动管液体密度计》检定规程对密度计的等级划分和检定装置及检定过程进行了详细规定,最后通过将标准状态下获得的几组密度和对应的温度、频率数据,代入密度计生产厂商规定的拟合公式中,采用最小二乘法解算得到最佳拟合曲线方程系数以及拟合标准差。本文主要探讨在获得一系列关于密度、温度和实测频率值数据后应用MATLAB软件中的函数采用最
JJG370-2007 “on-line vibration tube liquid density meter,” the test procedures on the densitometer grade and verification device and the verification process were specified in detail, and finally obtained by the standard state of several sets of density and the corresponding temperature and frequency data into Among the fitting formulas specified by the manufacturer of the densitometer, the coefficient of the best-fit curve equation and the standard deviation of the fitting are obtained by using the least square method. This article focuses on the use of a series of on the density, temperature and measured frequency data after the application of MATLAB software, the function used most