Piezoelectric laminate motion sensing apparatus and method
US6998759B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 18, 2001 |
| Grant date | Feb 14, 2006 |
| Priority date | — |
| Expiry date | Jul 18, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N30/87
Abstract
A motion sensing system utilizing piezoelectric laminates with predetermined surface electrode patterns disposed thereon utilizes a frequency selector to pass motion waves of predetermined frequencies and an electrical circuit for processing the electrical signals for transmission to an activating device for appropriate activation. In particular, the frequency selector is a low frequency bandpass filter for free-fall acceleration wave frequencies. By directing appropriate action, the present invention increases the applicability of the device upon which it is mounted (e.g., for military or other hostile environment use), decreases the possibility of damage, and lengthens its useful life.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.