Patent ID: 11860018
Assignee: HORIBA STEC, CO., LTD.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A rate-of-change flow measurement device comprising:
a block body having a flow path;
a chamber comprising a part of the flow path of the block body;
a position control valve comprising an actuator;
a valve position sensor configured to measure a valve position of the actuator of the position control valve;
a first pressure sensor located on a first side of the flow path from the position control valve and configured to detect a first pressure at the first side of the flow path;
a second pressure sensor located on a second side of the flow path from the position control valve and configured to detect a second pressure at the second side of the flow path adjacent the chamber; and
a processor configured to:
receive valve position data from the valve position sensor indicating the valve position of the actuator;
receive, from the first pressure sensor, first pressure data;
receive, from the second pressure sensor, second pressure data; and
calculating a volume of the chamber at least in part using the valve position data when a calibration of a device-under-test is performed by decreasing a pressure of the chamber or increasing the pressure of the chamber while opening the position control valve to maintain the first pressure constant to stay at a pressure set point.