SLOW SPEED SIGNAL DETECTION FOR ABS SENSORS WITH ADAPTIVE TIME WATCHDOG CONCEPT FOR 0Hz CAPABILITY
US-2015370249-A1 · Dec 24, 2015 · US
Rotation angle detection device
US8933692B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8933692-B2 |
| Application number | US-201013389985-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 20, 2010 |
| Priority date | Aug 26, 2009 |
| Publication date | Jan 13, 2015 |
| Grant date | Jan 13, 2015 |
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Abstract
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An output signal V 1 =sin θ is output from a first magnetic sensor and an output signal V 2 =cos(θ+α) is output from a second magnetic sensor. An output signal correction unit in a rotation angle computing device corrects the output signal V 2 from the second magnetic sensor to an output signal V 2 ′ (=cos θ) so that a positional phase difference (90°+α) between the magnetic sensors and is made equal to a target phase difference of 90°. A rotation angle computing unit computes the rotation angle θ of a rotor based on the corrected signal V 2 ′ (=cos θ) and the other output signal V 1 (=sin θ).
First claim
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The invention claimed is: 1. A rotation angle detection device detecting a rotation angle of a rotating body and comprising: a first sensor disposed at a first position at a periphery of the rotating body and outputting a first sinusoidal signal in accordance with a rotation of the rotating body; a second sensor disposed at a second position at the periphery of the rotating body and at an angular interval from the first position and outputting a second sinusoidal signal, having…
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- G01D5/2448Primary
Physics · mapped topic
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- What does patent US8933692B2 cover?
- An output signal V 1 =sin θ is output from a first magnetic sensor and an output signal V 2 =cos(θ+α) is output from a second magnetic sensor. An output signal correction unit in a rotation angle computing device corrects the output signal V 2 from the second magnetic sensor to an output signal V 2 ′ (=cos θ) so that a positional phase difference (90°+α) between the magnetic sensors and is mad…
- Who is the assignee on this patent?
- Ueda Takeshi, Shimizu Yoshinobu, Jtekt Corp
- What technology area does this patent fall under?
- Primary CPC classification G01D5/2448. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Jan 13 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).