Source: https://patents.google.com/patent/US10550959B2/en
Timestamp: 2020-07-10 17:19:46
Document Index: 629845798

Matched Legal Cases: ['Application No. 61', 'Application No. 201110212566', 'Application No. 2014', 'Application No. 2014', 'Application No. 16160541', 'Application No. 16160541', 'Application No. 2012', 'Application No. 16160541', 'Application No. 10', 'Application No. 10', 'Application No. 2840238', 'Application No. 2840238', 'Application No. 201110212566', 'Application No. 201410371']

US10550959B2 - Control valve monitoring system - Google Patents
US10550959B2
US10550959B2 US16/249,556 US201916249556A US10550959B2 US 10550959 B2 US10550959 B2 US 10550959B2 US 201916249556 A US201916249556 A US 201916249556A US 10550959 B2 US10550959 B2 US 10550959B2
US16/249,556
US20190145544A1 (en
Kenneth Harold Carder
2016-10-13 Priority to US15/293,016 priority patent/US10197185B2/en
2019-01-16 Application filed by Fisher Controls International LLC filed Critical Fisher Controls International LLC
2019-01-16 Priority to US16/249,556 priority patent/US10550959B2/en
2019-04-16 Assigned to FISHER CONTROLS INTERNATIONAL LLC reassignment FISHER CONTROLS INTERNATIONAL LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ANDERSON, SHAWN W., CARDER, KENNETH H.
2019-05-16 Publication of US20190145544A1 publication Critical patent/US20190145544A1/en
2020-02-04 Publication of US10550959B2 publication Critical patent/US10550959B2/en
This application is a division of U.S. patent application Ser. No. 15/293,016, filed Oct. 13, 2016, which is a divisional of U.S. patent application Ser. No. 13/552,379, filed Jul. 18, 2012, which claims the benefit of U.S. Application No. 61/510,252, filed Jul. 21, 2011, all of which are hereby incorporated by reference in their entirety herein.
A control valve monitoring system comprises at least one sensor connected to one of a valve stem or valve shaft and a device for providing data regarding the change in mechanical integrity of one of the valve stem or valve shaft. The at least one sensor of the control valve monitoring system may be one of an acoustic emission sensor or an active ultrasonic sensor. The acoustic emission sensor may detect cracking in one of the valve shaft or valve stem through a change in acoustic signature, and the acoustic emission sensor may be attached to an end of the valve shaft or valve stem. The at least one sensor may also be one of a piezoelectric wave active sensor or a piezoceramic (PZT) sensor, such that the impedance of one of the piezoelectric wave active sensor and the PZT sensor to the valve shaft or stem may be correlated to the impedance of the valve shaft or valve stem, allowing a change in mechanical integrity of the valve shaft or valve stem to be detected.
Referring now to FIG. 2, a sliding-stem control valve 100 is illustrated Like the rotary-shaft control valve 10, the sliding-stem control valve 100 also includes a valve body 112, a valve inlet 114, a valve outlet 116, and a flow passage 118 extending between the valve inlet 114 and the valve outlet 116. The flow passage 118 also includes a control passage 120, and a moveable control element 122 disposed in the control passage 120. The control element 122 is a linear control element 122A, such as a plug, that is connected to a first end of a valve stem 124. A second end of the valve stem 124 disposed opposite the first end is operatively connected to an actuator (not shown) commonly employed in the art.
Generally, SHM is the process of implementing a damage detection and characterization strategy for engineering structures. Damage is often defined as changes to the material and/or geometric properties of a structural system, which adversely affect the system's performance. The SHM process involves observing a system over time using periodically sampled dynamic response measurements from an array of sensors, the extraction of damage-sensitive features from these measurements, and the statistical analysis of these features to determine the current state of the system health. See, e.g., http://en.wikipedia.org/wiki/Structural_health_monitoring, Apr. 13, 2011.
Referring now to FIG. 4, the shaft 24 of the rotary-shaft control valve 10 of FIG. 1 is again illustrated with another control valve monitoring system 300 using SHM technology. In a similar manner, the control valve monitoring system 300 may also be used with the stem 124 of the sliding-stem control valve 100 of FIG. 2. The control valve monitoring system 300 includes at least one sensor 310A that may be an optical fiber Bragg grating (FBG) sensor 310A for detecting a crack or change in material property of the shaft 24 or stem 124. The FBG sensor 310A is attached via bonding or soldering to an outer diameter of the shaft 24 or stem 124 between the valve element 22A and the actuator (not shown) disposed on an end of the shaft 24 opposite the valve element 22A. The FBG sensor 310A measures strain at a localized area on the shaft 24 or stem 124 (FIG. 2). By doing so, the control valve monitoring system 300 incorporates physical characteristic measurements of the valve shaft 24 or stem 124 (instead of an inferred or calculated estimation of component fatigue), providing time for an end user to prepare for maintenance of the valve shaft 24 or stem 124.
Thus, while particular embodiments and applications have been illustrated and described, it is to be understood that the disclosed embodiments are not limited to the precise construction and components described herein. For example, those skilled in the art will appreciate that the outer diameter of the shaft 24 or stem 124 to which at least one sensor 210A (FIG. 3), 310A (FIG. 4) is attached is equivalent to an outer surface of the shaft 24 or stem 124. In addition, while the two control valve monitoring systems 200, 300 described herein are illustrated in FIGS. 3 and 4 as being integrated into the shaft 24 of the rotary-shaft control valve 10 of FIG. 1, the two control valve monitoring systems 200, 300 can also be fully integrated into the stem 124 of the sliding-stem control valve 100 of FIG. 2. Still further, those skilled in the art will also appreciate that the devices 220, 320 for providing data regarding the change in mechanical integrity of one of the valve stem 124 or valve shaft 24 may include one or more of a processor, a memory, a battery, and a wireless interface and still fall within the spirit and scope of the appended claims. In one example, the device 220 of FIG. 3 includes a processor 222, a memory 224, a battery 226, and a wireless interface 228, and the device 320 of FIG. 4 may also include one or more of the same. In sum, and as explained herein, these various modifications and others may be made in the arrangement, operation and details of the system and method disclosed herein without departing from the scope defined in the appended claims.
at least one sensor connected to one of a valve stem or valve shaft, the sensor for detecting a change in mechanical integrity of one of the valve stem or valve shaft, wherein the at least one sensor is an optical fiber Bragg Grating (FBG) sensor; wherein the optical fiber Bragg grating (FBG) sensor measures strain at a localized area of the valve shaft or valve stem;
a device for providing data regarding the change in mechanical integrity of one of the valve stem or valve shaft, and
wherein the FBG sensor is attached to an outer surface of the valve stem or the valve shaft between an end of the valve stem or the valve shaft connected to a control element and another end of the valve stem or the valve shaft opposite to the control element by one of a bonding agent or a soldering agent.
2. The control valve monitoring system of claim 1, wherein the at least one sensor is wireless.
3. The control valve monitoring system of claim 1, further including memory and a power source for constant data gathering and reporting of faults in the valve shaft or valve stem.
4. A method of detecting a change in mechanical integrity of a valve shaft of a rotary-shaft control valve or a valve stem of a sliding-stem control valve, the method comprising:
integrating at least one sensor into a valve shaft or a valve stem, wherein the at least one sensor is an optical fiber Bragg Grating (FBG) sensor;
measuring strain at a localized area of the valve shaft or valve stem using the optical fiber Bragg grating (FBG) sensor;
sensing fatigue in the valve shaft or valve stem via the FBG sensor by measuring the strain,
wherein integrating at least one sensor into the valve shaft or the valve stem comprises attaching, via one of the bonding agent or a soldering agent, the FBG sensor to an outer surface of the valve stem or the valve shaft between an end of the valve stem or the valve shaft connected to a control element and another end of the valve stem or the valve shaft opposite to the control element, allowing a change in mechanical integrity of one of the valve shaft or the valve stem to be detected.
5. The method of claim 4, further comprising providing data regarding the change in mechanical integrity of the valve shaft or valve stem to one or more of a local digital valve positioner, a standalone device for data collection and reduction, an asset management software package, or a control system.
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Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CARDER, KENNETH H.;ANDERSON, SHAWN W.;REEL/FRAME:048896/0457