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US 12,352,367 B2Granted
Control valve position detection
AssigneeWOCO Industrietechnik GmbH
InventorEberhard Geißel
Life of this patent
Estimating the term…
Abstract
A method for detecting the position of an actuator includes adjustment of a control valve by an actuator. An actuator-characteristic operating variable may include a drive power, a drive operating force and/or a drive torque, and is detected continuously or discontinuously for determining the actuator position.
Claims10
A control valve position detection device for a control valve, the control valve position detection device comprising:
- a control element configured to be adjusted by a drive;
- electronics configured to:
- cause a short-term change in the actuator-characteristic operating variable, wherein the short-term change is reversible;
- and
- detect a position of the control element based on the short-term change in the actuator-characteristic operating variable, the actuator-characteristic operating variable comprising a drive power, a drive actuating force, or a drive torque;
- and
- monitoring electronics configured to:
- monitor a position of an actuator based on the actuator-characteristic operating variable, and/or diagnose the position of the actuator based on the short-term change in the actuator-characteristic operating variable.
5 more elements
A directional control valve for adjusting a process fluid flow, comprising:
- at least one fluid channel;
- an actuator configured to close and at least partially open one of the at least one fluid channel;
- a drive coupled to the actuator configured to apply actuating forces;
- a control valve position detection device comprising:
- a control element configured to be adjusted by the drive;
- and electronics configured to:
- (a) cause a short-term change in the actuator-characteristic operating variable, wherein the short-term change is reversible;
- and (b) detect a position of the control element based on the short-term change in the actuator-characteristic operating variable;
- and
- a position detector configured to:
- (a) detect a position of the actuator and generate a corresponding position signal;
- and
- (b) monitor the position of the actuator based on the actuator-characteristic operating variable, and/or diagnose the position of the actuator based on a the short-term change in the actuator-characteristic operating variable.
10 more elements
Dependencies are inferred from the claim text.