Compound piezoelectric accelerometer with residual voltage matching
US4532450A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 13, 1984 |
| Grant date | Jul 30, 1985 |
| Priority date | — |
| Expiry date | Aug 13, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P15/0922
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The compound accelerometer is made by combining two simple accelerometer units. The simple accelerometer units consist of a hollow container closed at each end by a piezo-electric transducer. The two transducers are oppositely polarized and are selected to have a desired combined series capacitance value. The container is partially filled with a volume of heavy liquid and the accelerometer is excited. During excitation, the output voltage is continuously measured and the volume of liquid is microadjusted until the output voltage equals a prescribed level. The outputs of the individual transducers are measured, the residual voltage difference is tabulated and the dominant transducer is identified. Two simple accelerometer units having the same residual voltage difference are secured together with the dominant transducers facing oppositely with respect to each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.