Measuring apparatus for two-variable function signal system

摘要

A measuring apparatus for two-variable function signal system such as is used to measure sulfur concentration in variable density petroleum, characterized by a linearizing circuit for linearizing the difference between a reference input signal and an input exponential function signal having two independent variables as its exponents; a circuit for subtracting from the output signal of the linearizing circuit a signal corresponding to the product of the reference value of the desired one of the independent variables and the difference between the reference value of the other independent variable and the other independent variable; and a division circuit with its dividend input being a signal corresponding to the output of the subtraction circuit, and its divisor input being a signal corresponding to the difference between the reference value of the other independent variable and the other independent variable.