Interrogation method for passive wireless sensor interrogation system
US8296087B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 2010 |
| Grant date | Oct 23, 2012 |
| Priority date | — |
| Expiry date | Dec 30, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60C23/0449
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A method of wirelessly interrogating a sensing device comprising a plurality of passive sensors, to determine a measurement parameter, comprises the steps of repeatedly interrogating the sensing device using a predetermined transmission signal and detecting the response; estimating the measurement parameter for each sensor by means of an analysis of the data accumulated as a result of the interrogation step, and determining the average of the parameters derived from the estimating step for each sensor, using a weighted average, in which the weightings depend on the amplitude of the sensor response. The measurement parameter may be a resonant frequency where the passive sensors are resonant devices, and the sensors may be SAW devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.