Patent ID: 9057636
Filing Date: 2015-06-16
Classification: G01F,G05D

Abstract:
1. A diagnostic mechanism that verifies or calibrates a measured value of a fluid sensor that measures a flow rate or a pressure of fluid flowing through a flow path, the diagnostic mechanism comprising: a valve fully closing part that outputs a fully closing signal for fully closing a valve provided in the flow path; a diagnostic parameter calculation part that divides, into a plurality of diagnostic intervals, a fluid parameter changing interval in which the valve is in a state of being kept in a fully closed state or in a state of being changed from the fully closed state to an opened state, and the flow rate or the pressure of the fluid flowing through the flow path changes with time, and also on a basis of a flow rate or pressure measured value outputted from the fluid sensor in each of the diagnostic intervals, calculates a corresponding diagnostic parameter for each of the respective diagnostic intervals; and a diagnostic part that, on a basis of each of the diagnostic parameters calculated for the respective diagnostic intervals and at least one preset reference parameter, verifies or calibrates the flow rate or pressure measured value outputted by the fluid sensor in the diagnostic interval.