Monitoring system for cyclically operating machines
AssigneeKistler Instrumente AG
InventorsHans Sonderegger, Rolf Kuratle, Peter Wolfer
Life of this patent
Estimating the term…
Abstract
Monitoring systems for cyclically operating machines having a cylinder including sensor to be mounted on the exterior of said cylinder for detecting both force in said cylinder and structure-borne signals in the cylinder; and having a computer for storing pre-recorded force and structure-borne noise signal as a function of time in a cycle and for comparing said detected and pre-recorded force and structure-borne noise signals to determine the status of said machine. The sensor has the form of a thin disk fitted between a cylinder cover and a nut of a cylinder cover stud under preload, thus replacing the standard washer.
Claims12
Monitoring systems for cyclically operating machines having a cylinder comprising:
- at least one sensor means mounted at a single measuring point on the exterior of said cylinder and including a force sensor for detecting force in said cylinder which is indicative of the pressure in said cylinder and an acceleration sensor for detecting structure-borne noise in said cylinder;
- and
- computer means for storing pre-recorded force and structure-borne noise as a function of time in a cycle of said cylinder as a reference and for comparing said detected force and structure-borne noise and reference force and structure-borne noise to determine the status of said machine.
A method of monitoring the operating state of a cyclically operating machine having a cylinder comprising:
- sensing at a single measuring point on the exterior of the cylinder both force in said cylinder which is indicative of the pressure in said cylinder and structure-borne noise in said cylinder;
- storing said sensed force and noise as a function of time as a reference;
- subsequently sensing at said single measuring point on the exterior of the cylinder both force and structure-borne noise in said cylinder and comparing said subsequently sensed force and noise with said reference force and noise as a function of time in a cycle of said cylinder to determine the operating status of said machine.
Monitoring systems for cyclically operating machines having a cylinder comprising:
- at least one sensor means mounted at a single measuring point on the exterior of said cylinder and including a force sensor for detecting both force in said cylinder which is indicative to the pressure in said cylinder and structure-borne noise in said cylinder;
- electronic means for separating the detected cylinder force and the structure-borne noise;
- and
- computer means for storing separately pre-recorded force and structure-borne noise as a function of time in a cycle of said cylinder as a reference and for comparing said separated detected force and structure-borne noise and reference force and structure-borne noise to determine the status of said machine.
Dependencies are inferred from the claim text.