Acceleration detector with radial arm diaphragm
US5226325A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 26, 1991 |
| Grant date | Jul 13, 1993 |
| Priority date | — |
| Expiry date | Apr 26, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L23/222
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An acceleration detector comprising a housing adapted to be rigidly secured to an object of which acceleration is to be detected and a transducer assembly disposed within the housing for detecting the acceleration on the housing. The transducer assembly comprises a disc-shaped diaphragm having a circular central region flexible in response to the acceleration on the housing and a plurality of radial arms integrally extending at equal intervals from the central region and supported by the housing at outer ends. A disc-shaped piezoelectric element is attached to the central region of the diaphragm for sensing flexture of the central region and generating a signal representative of the acceleration on the housing. The central region has a diameter not smaller than that of the piezoelectric element. The radial arms may have a total circumferential width dimension effective to improve temperature vs. resonance frequency characteristics of the transducer assembly. The housing may comprise a base and a cover securely connected together, and a continuous ring-shaped member connected to outer ends of the radial arms is firmly clamped in an air-tight manner between the base and the cover.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.