Patent ID: 9026397
Filing Date: 2015-05-05
Classification: F16K,G01M

Abstract:
1. A stick-slip detecting device for a movable portion of a valve or gas governor, comprising: a diagnosing device evaluating a malfunction of the movable portion, comprising: a diagnosing operation controlling portion stopping the evaluating operation of the diagnosing portion based on a control instruction value controlling the physical dislocation of the movable portion, wherein the diagnosing operation controlling portion comprises: wherein the first state quantity is a magnitude of a small change in the physical dislocation; wherein the second state quantity is a magnitude of a small change in the magnitude of the small change in the physical dislocation; wherein the movable portion is a piston; wherein the contact sliding portion is an interior surface of a chamber that houses the piston; wherein the third state quantity is a magnitude of a small change in the control instruction value; and wherein the fourth state quantity is a magnitude of a small change in the magnitude of the small change in the control instruction value.