Rotational sensing based on inductive sensing
US-9829501-B2 · Nov 28, 2017 · US
Inductive rotational speed sensors
US9285386B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9285386-B2 |
| Application number | US-201414188720-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 25, 2014 |
| Priority date | Dec 6, 2013 |
| Publication date | Mar 15, 2016 |
| Grant date | Mar 15, 2016 |
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Abstract
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An inductive rotational speed sensor assembly includes a first PCB with a transmitter coil configured to convert an alternating electrical input into an alternating magnetic field. A second PCB is operatively connected to the first PCB for relative rotation and includes a resonance coil configured to couple to the alternating magnetic field of the first PCB to output a modulating position signal. The first PCB includes a receiver coil configured to receive the first and the modulating position signal and to output a signal indicative of rotational speed of the second PCB relative to the first PCB.
First claim
Opening claim text (preview).
What is claimed is: 1. A method of converting an electrical signal to a rotational speed comprising: converting an alternating electrical input to an alternating magnetic field using a transmitter coil of a first PCB; receiving the alternating magnetic field with a resonance coil of a second PCB rotating relative to the first PCB; emitting a modulating position signal from the resonance coil of the second PCB; receiving the modulating position signal with a receiver coil of the first PCB; outputting a signal indicative of rotational speed from the first PCB; and converting the output signal to an angular frequency Ω=360°/nT, where Ω is an angular speed in degrees per second, n is a number of receiver coil pole pairs on the first PCB, and T is a period of the outputted signal. 2. A method as recited in claim 1 , further comprising calculating the rotational speed from consecutive peaks created by constructive interference in the output signal. 3. A method as recited in claim 2 , wherein the rotational speed is calculated using the time between consecutive peaks of the output signal.
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Frequently asked questions
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- What does patent US9285386B2 cover?
- An inductive rotational speed sensor assembly includes a first PCB with a transmitter coil configured to convert an alternating electrical input into an alternating magnetic field. A second PCB is operatively connected to the first PCB for relative rotation and includes a resonance coil configured to couple to the alternating magnetic field of the first PCB to output a modulating position signa…
- Who is the assignee on this patent?
- Rosemount Aerospace Inc
- What technology area does this patent fall under?
- Primary CPC classification G01P3/48. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Mar 15 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).