Title:
MONITORING OPTICALLY POWERED ACTUATORS
Document Type and Number:
WIPO Patent Application WO2002016780
Kind Code:
A3
Abstract:
Operation of a power-by-light valve (15) by a source (11) along an optical fibre (13) is monitored by means of optical sensors (14) from which light passes back along fibre (13) to monitoring and processing units (16, 17). The sensors (14) include fibre bragg gratings (41, 43) for detecting differential pressure across diaphragms (42) and for detecting temperature. At the input end, an optical coupler (12) supplies sensor signals to units (16, 17) which can control source (11) via a signal (32).
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| WO/2012/030003 | HYDRAULIC CIRCUIT FOR CONSTRUCTION EQUIPMENT |
Inventors:
LIM JIRAPONG (TH)
YANG QINGPING (GB)
JACKSON PHILLIP RICHARD (GB)
JONES BARRY EDWARD (GB)
YANG QINGPING (GB)
JACKSON PHILLIP RICHARD (GB)
JONES BARRY EDWARD (GB)
Application Number:
PCT/GB2001/003803
Publication Date:
May 08, 2003
Filing Date:
August 23, 2001
Export Citation:
Assignee:
UNIV BRUNEL (GB)
LIM JIRAPONG (TH)
YANG QINGPING (GB)
JACKSON PHILLIP RICHARD (GB)
JONES BARRY EDWARD (GB)
LIM JIRAPONG (TH)
YANG QINGPING (GB)
JACKSON PHILLIP RICHARD (GB)
JONES BARRY EDWARD (GB)
International Classes:
F15B13/043; F16K31/00; (IPC1-7): G01D5/00; F16K37/00
Foreign References:
| EP0954743A1 | 1999-11-10 | |||
| US6056436A | 2000-05-02 | |||
| US5584319A | 1996-12-17 | |||
| EP1030472A2 | 2000-08-23 | |||
| EP0511787A1 | 1992-11-04 |
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