Method and apparatus for diagnosis of motor-operated valve
US7769563B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 10, 2005 |
| Grant date | Aug 3, 2010 |
| Priority date | — |
| Expiry date | Jun 1, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R15/207
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A method and an apparatus for diagnosis of a motor-operated valve for determining the degree of abnormality of the motor-operated valve in which rotational driving force of a driving motor 1 is mechanically transmitted to drive a valve disc 8 to an open or close position. The on-off timing of driving energy to the driving motor 1 is determined based on signal information from a plurality of magnetisms sensors 16 attached to a power cable tube 15 housing a power cable 14 or control line for driving the driving motor 1. The timing when the driving energy to the driving motor 1 is turned on and off when the valve disc 8 is shifted to an open or close position can be determined precisely.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.