Target detection in magnetostrictive sensors using a target frequency range
US11543269B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 27, 2021 |
| Grant date | Jan 3, 2023 |
| Priority date | — |
| Expiry date | Jan 27, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N29/46
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A magnetostrictive position measuring method determines a time of flight of a magnetostrictive response transmitted through a waveguide. The magnetostrictive response is generated using a target magnet in response to a magnetostrictive excitation. In the method, an electrical response signal containing an indicator of the magnetostrictive response is digitally sampled at a sampling rate to obtain a plurality of samples. An amplitude of each of the plurality of samples within a target frequency range is determined through an analysis of the plurality of samples in a frequency domain. A peak sample from the plurality of samples in the frequency domain corresponding to the magnetostrictive response is identified. The time of flight and a position of the target magnet along the waveguide is determined based on the peak sample.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.