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Coded acoustic wave sensors and system using time diversityAn apparatus and method for distinguishing between sensors that are to be wirelessly detected is provided. An interrogator device uses different, distinct time delays in the sensing signals when interrogating the sensors. The sensors are provided with different distinct pedestal delays. Sensors that have the same pedestal delay as the delay selected by the interrogator are detected by the interrogator whereas other sensors with different pedestal delays are not sensed. Multiple sensors with a given pedestal delay are provided with different codes so as to be distinguished from one another by the interrogator. The interrogator uses a signal that is transmitted to the sensor and returned by the sensor for combination and integration with the reference signal that has been processed by a function. The sensor may be a surface acoustic wave device having a differential impulse response with a power spectral density consisting of lobes. The power spectral density of the differential response is used to determine the value of the sensed parameter or parameters.
Document ID
20120001632
Acquisition Source
Kennedy Space Center
Document Type
Other - Patent
Authors
Solie, Leland P.
Hines, Jacqueline H.
Date Acquired
August 25, 2013
Publication Date
January 10, 2012
Subject Category
Acoustics
Funding Number(s)
CONTRACT_GRANT: NNK07EA38C
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
US-Patent-8,094,008
Patent Application
US-Patent-Appl-SN-12/267,153

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