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Piezoelectric sensor device, and polarization method of piezoelectric body of piezoelectric sensor device
US9112142B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9112142-B2 |
| Application number | US-201213495146-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 13, 2012 |
| Priority date | Jun 15, 2011 |
| Publication date | Aug 18, 2015 |
| Grant date | Aug 18, 2015 |
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Abstract
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A piezoelectric sensor device includes a piezoelectric element, a polarization processing unit and a controller. The piezoelectric element has a pair of electrodes sandwiching a piezoelectric body. The polarization processing unit is configured to execute polarization processing in which polarization voltage is applied to the polarization element. The controller is configured to control an execution timing of the polarization processing by the polarization processing unit, and includes a characteristics value acquisition unit configured to acquire a characteristics value relating to a polarization volume of the piezoelectric body, a determination unit configured to determine whether a polarization property is in a stable state or in an unstable state based on the characteristics value, and a polarization controller configured to control the polarization processing unit to apply the polarization voltage to the piezoelectric body when the determination unit determines that the polarization property of the piezoelectric body is in the unstable state.
First claim
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What is claimed is: 1. A piezoelectric sensor device comprising: a piezoelectric element having a piezoelectric body and a pair of electrodes sandwiching the piezoelectric body; a polarization processing unit configured to execute polarization processing in which polarization voltage is applied to the piezoelectric element; and a controller configured to control an execution timing of the polarization processing by the polarization processing unit, the controller including a…
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Frequently asked questions
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- What does patent US9112142B2 cover?
- A piezoelectric sensor device includes a piezoelectric element, a polarization processing unit and a controller. The piezoelectric element has a pair of electrodes sandwiching a piezoelectric body. The polarization processing unit is configured to execute polarization processing in which polarization voltage is applied to the polarization element. The controller is configured to control an exec…
- Who is the assignee on this patent?
- Nakazawa Yusuke, Onogi Tomohide, Seiko Epson Corp
- What technology area does this patent fall under?
- Primary CPC classification G01B17/00. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Aug 18 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).