公开(公告)号：WO2019055046A1

公开(公告)日：2019-03-21

申请号：PCT/US2017/052039

申请日：2017-09-18

Applicant: NUMATICS, INCORPORATED

Inventor： DE CAROLIS, Enrico ,  WELLS, Gregory, A., Sr. ,  FRAZIER, Mitch

IPC: F16K31/00 ,  F15B13/00

Abstract: A field bus solenoid valve assembly has a sensor for detecting the commencement of an actuation cycle for moving a piston in a cylinder and piston assembly. A position sensor detects an end position of a piston in a cylinder and piston assembly at the end of the actuation cycle. A timer times the elapsed time between the initiation of the actuation cycle of the piston and when the position sensor for detecting an end position detects the piston in its end position at the end of the actuation cycle. A comparator operably connected to a storage device and the sensors for comparing elapsed time from the sensors to a normalized time or profile and a predetermined tolerance boundary in the storage device. An alarm device is actuated if the elapsed time is outside of the set tolerance boundary.