Interferometric Rotary Encoder
US-2016349086-A1 · Dec 1, 2016 · US
Phased based sensing
US8994953B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8994953-B2 |
| Application number | US-200913060546-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 20, 2009 |
| Priority date | Aug 27, 2008 |
| Publication date | Mar 31, 2015 |
| Grant date | Mar 31, 2015 |
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Abstract
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Interrogation of a phase based transducer is performed by temporally overlapping and interfering a single pulse output from the transducer to determine the rate of change with time of the measurand represented as a phase change. The rate of change, or derivative of the phase change typically has a much smaller amplitude than the signal itself, and the derivative measurement therefore has reduced sensitivity. In this way, large amplitude signals which might otherwise be subject to overscaling effects can be measured more effectively.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method of interrogating a phase based transducer, said transducer providing a change in phase of signal propagation in response to a sensed parameter, said method comprising: passing a single pulse through the transducer, and receiving the single pulse at a phase detector, combining a delayed version and an undelayed version of said single pulse signal within the phase detector, the delayed and undelayed versions both having passed through the tran…
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- G01D5/35303Primary
Physics · mapped topic
Physics · mapped topic
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- What does patent US8994953B2 cover?
- Interrogation of a phase based transducer is performed by temporally overlapping and interfering a single pulse output from the transducer to determine the rate of change with time of the measurand represented as a phase change. The rate of change, or derivative of the phase change typically has a much smaller amplitude than the signal itself, and the derivative measurement therefore has reduce…
- Who is the assignee on this patent?
- Crickmore Roger Ian, Qinetiq Ltd
- What technology area does this patent fall under?
- Primary CPC classification G01D5/35303. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Mar 31 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).