Method for producing pressure detection device, pressure detection device, pressure-sensitive sensor, and electronic device
US-2015378483-A1 · Dec 31, 2015 · US
Inertial force sensor and zero point correction method used therein
US8939007B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8939007-B2 |
| Application number | US-201214006084-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 26, 2012 |
| Priority date | Apr 27, 2011 |
| Publication date | Jan 27, 2015 |
| Grant date | Jan 27, 2015 |
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Abstract
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A detecting unit outputs an object signal corresponding to an inertial force. A corrected signal is generated by correcting the object signal. A first environment value is obtained at a first time point. A second environment value is obtained at a second time point after the first time point. An environment difference value which is a difference between the first and second environment values is calculated. An environment change detection signal is output when an absolute value of the environment difference value is larger than a predetermined determination threshold. A first averaged signal is output by averaging a corrected signal in a predetermined period continuing to the first time point. A second averaging signal is output by averaging the corrected signal in a predetermined period continuing to the second time point. An offset difference value which is a difference between the first and second averaged signals is calculated. The offset difference value is stored when the environment change detection signal is output. The corrected signal is generated by adding the stored offset difference value to the object signal. This method can easily reduce the output offset even if an environment, such as an ambient temperature, abruptly changes.
First claim
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The invention claimed is: 1. An inertial force sensor comprising: a detecting element; a detecting circuit for detecting an amount of inertia corresponding to an inertial force applied to the detecting element; an A/D converter for converting an output of the detecting circuit to a digital signal; a first filter connected to an output port of the A/D converter; a correction circuit for correcting an output of the first filter; a clock generator for generating a first clo…
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Physics · mapped topic
- G01L25/00Primary
Physics · mapped topic
- G01C19/5614Primary
Physics · mapped topic
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Frequently asked questions
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- What does patent US8939007B2 cover?
- A detecting unit outputs an object signal corresponding to an inertial force. A corrected signal is generated by correcting the object signal. A first environment value is obtained at a first time point. A second environment value is obtained at a second time point after the first time point. An environment difference value which is a difference between the first and second environment values i…
- Who is the assignee on this patent?
- Uemura Takeshi, Hattori Isao, Panasonic Corp
- What technology area does this patent fall under?
- Primary CPC classification G01L25/00. 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).