Bottom bracket unit for a bicycle
US-9403577-B2 · Aug 2, 2016 · US
Velocity determination apparatus
US9506944B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9506944-B2 |
| Application number | US-201113883007-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 1, 2011 |
| Priority date | Nov 3, 2010 |
| Publication date | Nov 29, 2016 |
| Grant date | Nov 29, 2016 |
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Abstract
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The invention relates to a velocity determination apparatus ( 1 ) for determining a velocity of an object ( 2 ). A Doppler frequency measuring unit is adapted to measure Doppler frequencies in at least three different frequency directions, wherein a Doppler frequency calculation unit is adapted to calculate a Doppler frequency for a calculation frequency direction being similar to one of the at least three different frequency directions depending on the Doppler frequencies measured for at least two further frequency directions of the at least three different frequency directions. The velocity can then be determined depending on the calculated Doppler frequency and the measured Doppler frequencies. Since in the calculation frequency direction the measured Doppler frequency is not needed for determining the velocity, a reliable velocity can be determined also in the calculation frequency direction, even if the measurement of the Doppler frequency in this calculation frequency direction is disturbed.
First claim
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The invention claimed is: 1. A velocity determination apparatus for determining a velocity of an object, the velocity determination apparatus comprising: at least three radiation sources configured to emit radiation in at least three different frequency directions respectively; a Doppler frequency measuring unit configured to measure a Doppler frequency based on the radiation reflected in the at least three different frequency directions; a Doppler frequency calculation unit c…
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- What does patent US9506944B2 cover?
- The invention relates to a velocity determination apparatus ( 1 ) for determining a velocity of an object ( 2 ). A Doppler frequency measuring unit is adapted to measure Doppler frequencies in at least three different frequency directions, wherein a Doppler frequency calculation unit is adapted to calculate a Doppler frequency for a calculation frequency direction being similar to one of the at…
- Who is the assignee on this patent?
- Carpaij Mark, Pentchev Atanas, Koninklijke Philips Nv
- What technology area does this patent fall under?
- Primary CPC classification G01P3/36. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Nov 29 2016 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).