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Contactless detection apparatus and method for detecting a rotation direction
US8941375B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8941375-B2 |
| Application number | US-201213708484-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 7, 2012 |
| Priority date | Dec 7, 2012 |
| Publication date | Jan 27, 2015 |
| Grant date | Jan 27, 2015 |
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Abstract
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A contactless detection apparatus has a first magnet ring, a second magnet ring, a first magnetic sensor, a second magnetic sensor and a controller. The two magnet rings are respectively mounted on two ends of a torsion shaft. When the torsion shaft rotates, the controller detects the magnetic fields of the two magnet rings through the two magnetic sensors. The controller calculates a twisting torque exerted on the torsion shaft and a rotational angle of the torsion shaft according to the detected magnetic fields at the same time. The detection apparatus of the invention has simple structure. The magnetic fields of both magnet rings do not interfere with each other, such that the detection result of the invention is accurate.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for detecting a rotation direction, comprising the steps of: detecting a magnetic field generated from a first magnet ring mounted around a shaft unit by a first magnetic sensor; detecting a magnetic field generated from a second magnet ring mounted around the shaft unit by a second magnetic sensor, wherein the first magnet ring and the second magnet ring have different numbers of pairs of poles; receiving a first potential and a second potentia…
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Physics · mapped topic
Physics · mapped topic
Physics · mapped topic
- G01P13/04Primary
Physics · mapped topic
Physics · mapped topic
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Frequently asked questions
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- What does patent US8941375B2 cover?
- A contactless detection apparatus has a first magnet ring, a second magnet ring, a first magnetic sensor, a second magnetic sensor and a controller. The two magnet rings are respectively mounted on two ends of a torsion shaft. When the torsion shaft rotates, the controller detects the magnetic fields of the two magnet rings through the two magnetic sensors. The controller calculates a twisting …
- Who is the assignee on this patent?
- Automotive Res & Testing Ct
- What technology area does this patent fall under?
- Primary CPC classification G01P13/04. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Jan 27 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).