Compensating method and compensating apparatus for positioner

Abstract

A compensating method for a positioner is provided, which makes it possible to avoid any temperature-compensating circuit and any linearity-compensating circuit for a position sensor, and reduce the production cost. The position sensor, which detects the displacement amount of a movable section of an objective control device operated on the basis of a control signal outputted from the positioner, provides an output which is subjected to the temperature compensation calculation by using a linear expression including a slope and an intercept determined on the basis of a temperature measured by a temperature sensor to obtain a temperature-compensated output data. The temperature-compensated output data is subjected to the linearity compensation calculation for compensating the nonlinearity of the position sensor by using a linear expression including a slope and an intercept determined on the basis of the temperature-compensated output data to obtain a linearity-compensated output data for which the nonlinearity has been compensated. An actuator is operated and controlled on the basis of the linearity-compensated output data.

Dependencies are inferred from the claim text.