US patent no. 7,904,256 B2: Startup techniques for a digital flowmeter
Startup and operational techniques for a digital flowmeter are described. The techniques select an optimal mode of operation for the digital flowmeter, depending on a current environment of the flowmeter. For example, during a startup operation of the flowmeter, the mode of operation might include a...
| Main Authors: | , |
|---|---|
| Format: | Patent |
| Published: |
United States Patent and Trademark Office
2011
|
| _version_ | 1797101328042819584 |
|---|---|
| author | Henry, M Zamora, M |
| author_facet | Henry, M Zamora, M |
| author_sort | Henry, M |
| collection | OXFORD |
| description | Startup and operational techniques for a digital flowmeter are described. The techniques select an optimal mode of operation for the digital flowmeter, depending on a current environment of the flowmeter. For example, during a startup operation of the flowmeter, the mode of operation might include a random sequence mode, in which filtered, random frequencies are applied as a drive signal to a flowtube associated with the digital flowmeter. Once the flowtube reaches a resonant mode of vibration, the digital flowmeter may transition to a positive feedback mode, in which a sensor signal representing a motion of the flowtube is fed back to the flowtube as a drive signal, as part of a feedback loop. Once an oscillation of the flowtube is achieved and analyzed, a digital synthesis mode of operation may be implemented, in which the analyzed sensor signals are used to synthesize the drive signal. In either the positive feedback mode or the digital synthesis mode, the digital flowmeter may revert to a previous mode to regain stable and desired oscillation of the flowtube, such as might be required during a recovery operation associated with a disturbance to an operation of the digital flowmeter. |
| first_indexed | 2024-03-07T05:50:18Z |
| format | Patent |
| id | oxford-uuid:e8a43ad3-0234-45ce-9e47-ff43966e8ca0 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T05:50:18Z |
| publishDate | 2011 |
| publisher | United States Patent and Trademark Office |
| record_format | dspace |
| spelling | oxford-uuid:e8a43ad3-0234-45ce-9e47-ff43966e8ca02022-03-27T10:48:15ZUS patent no. 7,904,256 B2: Startup techniques for a digital flowmeterPatenthttp://purl.org/coar/resource_type/c_15cduuid:e8a43ad3-0234-45ce-9e47-ff43966e8ca0Symplectic Elements at OxfordUnited States Patent and Trademark Office2011Henry, MZamora, MStartup and operational techniques for a digital flowmeter are described. The techniques select an optimal mode of operation for the digital flowmeter, depending on a current environment of the flowmeter. For example, during a startup operation of the flowmeter, the mode of operation might include a random sequence mode, in which filtered, random frequencies are applied as a drive signal to a flowtube associated with the digital flowmeter. Once the flowtube reaches a resonant mode of vibration, the digital flowmeter may transition to a positive feedback mode, in which a sensor signal representing a motion of the flowtube is fed back to the flowtube as a drive signal, as part of a feedback loop. Once an oscillation of the flowtube is achieved and analyzed, a digital synthesis mode of operation may be implemented, in which the analyzed sensor signals are used to synthesize the drive signal. In either the positive feedback mode or the digital synthesis mode, the digital flowmeter may revert to a previous mode to regain stable and desired oscillation of the flowtube, such as might be required during a recovery operation associated with a disturbance to an operation of the digital flowmeter. |
| spellingShingle | Henry, M Zamora, M US patent no. 7,904,256 B2: Startup techniques for a digital flowmeter |
| title | US patent no. 7,904,256 B2: Startup techniques for a digital flowmeter |
| title_full | US patent no. 7,904,256 B2: Startup techniques for a digital flowmeter |
| title_fullStr | US patent no. 7,904,256 B2: Startup techniques for a digital flowmeter |
| title_full_unstemmed | US patent no. 7,904,256 B2: Startup techniques for a digital flowmeter |
| title_short | US patent no. 7,904,256 B2: Startup techniques for a digital flowmeter |
| title_sort | us patent no 7 904 256 b2 startup techniques for a digital flowmeter |
| work_keys_str_mv | AT henrym uspatentno7904256b2startuptechniquesforadigitalflowmeter AT zamoram uspatentno7904256b2startuptechniquesforadigitalflowmeter |