Method for calibrating phase-frequency characteristic of low frequence accelerometer based on time-spatial synchronization
US11067596B2 · kind B2 · utility
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Key dates
| Filing date | Oct 14, 2019 |
| Grant date | Jul 20, 2021 |
| Priority date | — |
| Expiry date | Mar 25, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P15/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for calibrating phase-frequency characteristics of low frequency accelerometer based on time-spatial synchronization, comprises: measuring excitation displacement of the low frequency accelerometer to realize excitation acceleration measurement of the low frequency accelerometer; realizing alignment of the excitation acceleration signal of the low frequency accelerometer with output voltage signal of the low frequency accelerometer in the spatial domain based on TSS technology, fitting the excitation acceleration signal and the output voltage signal respectively by SAM, and calculating phase φF of the excitation acceleration signal at a zero position of horizontal long-stroke shaker and phase φZ of the output voltage signal at the time when a zero encoder on the shaker outputs pulse; and calculating the sensitivity phase of the low frequency accelerometer with φZ and φF, and determining phase-frequency characteristics of the low frequency accelerometer by calibrating the sensitivity phases at different frequencies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.