05329956 is referenced by 36 patents and cites 5 patents.

A non-intrusive method for timing the full operational motion of a valve plug (26) in an electrically actuated, pneumatically operated valve (10). An actuation signal is sent to the valve actuator (54). A coil of wire (68) around the valve actuator solenoid (56), an accelerometer (70) on the solenoid slug (64), or a connection to a permanent pressure sensor (72), non-intrusively senses arrival of the actuation signal at the valve. The time measuring equipment (12) begins timing when the actuation signal is sensed. A laser valve motion sensor (74) then non-intrusively senses when the valve plug reaches a limit of motion. The time measuring equipment ends timing when the valve plug reaches a limit of motion. The time measuring equipment then records the elapsed time from the sensing of the arrival of actuation signal to the final limit of motion of the valve plug.

Title
Pneumatic operated valve stroke timing
Application Number
8/68741
Publication Number
5329956
Application Date
May 28, 1993
Publication Date
July 19, 1994
Inventor
Francis X McDonald
Enfield
CT, US
Winslow K Duff
Enfield
CT, US
William D Marriott
Ellington
CT, US
Agent
John H Mulholland
L James Ristas
Assignee
Combustion Engineering
CT, US
IPC
F16K 37/00
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