Diagnostic apparatus, system and method
AssigneeFesto AG & Co.
InventorsJan Reich, Holger Steltner, Uwe Leonhardt
Life of this patent
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Abstract
A diagnostic apparatus for a fluidic actuator, in particular a fluidic valve drive, which has an actuator element displaceable into different positions (x1, x2, xp1, xp2), wherein the diagnostic apparatus is configured to provide a first break-away pressure measured value (pi1) for a first position of the actuator element. The diagnostic apparatus is further configured to determine, based on the first break-away pressure measured value (pi1) and break-away pressure reference information (pri) stored in the diagnostic apparatus, a first break-away pressure prediction value (pp1) for a first prediction position (xp1) of the actuator element, the first prediction position being different from the first position (x1).
Claims17
A diagnostic apparatus for a fluidic actuator, which has an actuator element displaceable into different positions (x1, x2, xp1, xp2), wherein the diagnostic apparatus is configured to:
- provide, for a first position (x1) of the actuator element, a first break-away pressure measured value (pi1);
- and
- determine, based on the first break-away pressure measured value (pi1) and break-away pressure reference information (pri) stored in the diagnostic apparatus, a first break-away pressure prediction value (pp1) for a first prediction position (xp1) of the actuator element, the first prediction position (xp1) being different from the first position (x1).
A method for diagnosing a fluidic actuator, the method comprising:
- providing, (S1), a first break-away pressure measured value (pi1) for a first position (x1) of an actuator element of the fluidic actuator, and
- determining, (S2), based on the first break-away pressure measured value (pi1) and break-away pressure reference information (pri), a first break-away pressure prediction value (pp1) for a first prediction position (xp1) of the actuator element, the first prediction position (xp1) being different from the first position (x1), and
- providing, based on the first break-away pressure prediction value, wear information and/or information on a remaining service life of the fluid actuator.
A diagnostic apparatus for a fluidic actuator, which has an actuator element displaceable into different positions (x1, x2, xp1, xp2), wherein the diagnostic apparatus is configured to:
- provide, for a first position (x1) of the actuator element, a first break-away pressure measured value (pi1);
- determine, based on the first break-away pressure measured value (pi1) and break-away pressure reference information (pri) stored in the diagnostic apparatus, a first break-away pressure prediction value (pp1) for a first prediction position (xp1) of the actuator element, the first prediction position (xp1) being different from the first position (x1);
- provide, for a second position (x2) of the actuator element, a second break-away pressure measured value (pi2);
- and
- determine, based on the second break-away pressure measured value (pi2) and the break-away pressure reference information (pri), a second break-away pressure prediction value (pp2) for a second prediction position (xp2), the second prediction position (xp2) being different from the second position (x2),
- wherein the diagnostic apparatus is configured to subject the first break-away pressure prediction value (pp1) and/or the second break-away pressure prediction value (pp2) to a transformation such that the first break-away pressure prediction value and the second break-away prediction value are moved in the same direction with increasing stiffness of the actuator element.
Dependencies are inferred from the claim text.