Patent ID: 9459629
Filing Date: 2016-10-04
CPC Classification: G05D,Y10T

Claim Text:
1. A flow rate controller comprising: a flow rate sensor that is provided in a flow path through which fluid flows; a flow rate control valve that is provided in the flow path; a setting flow rate shaping part that, in a case of receiving an input setting flow rate in which an absolute value of a deviation between a first target value and a second target value changes by a reference value or more within a reference time, outputs a shaped setting flow rate formed with an interval in which from the first target value to the second target value, a continuous change is made over a predetermined period of time; and a valve control part that controls an opening level of the flow rate control valve so as to reduce a deviation between the shaped setting flow rate outputted from the setting flow rate shaping part and a measured flow rate measured by the flow rate sensor, wherein the setting flow rate shaping part is configured to, depending on a magnitude of the absolute value of a deviation between the first target value and the second target value in the received input setting flow rate, change an amount of change in a target value per unit time in the interval.