NASA STTR 2007 Solicitation


PROPOSAL NUMBER: 07-2 T6.01-9969
RESEARCH SUBTOPIC TITLE: Wireless Surface Acoustic Wave (SAW) Sensor Arrays
PROPOSAL TITLE: Wireless, Passive Encoded Saw Sensors and Communication Links - Phase II

NAME: Mnemonics, Inc. NAME: University of Central Florida
STREET: 3900 Dow Road, Suite J STREET: 12201 Research Pkwy., Suite 501
CITY: Melbourne CITY: Orlando
STATE/ZIP: FL  32934 - 9255 STATE/ZIP: FL  32826 - 3246
PHONE: (321) 254-7300 PHONE: (407) 823-3031

PRINCIPAL INVESTIGATOR/PROJECT MANAGER (Name, E-mail, Mail Address, City/State/Zip, Phone)
TJ Mears
3900 Dow Road, Suite J
Melbourne, FL 32934 - 9255
(321) 321-7300

Expected Technology Readiness Level (TRL) upon completion of contract: 5 to 6

TECHNICAL ABSTRACT (Limit 2000 characters, approximately 200 words)
The innovation proposed here is a complete, wireless remote sensing solution using passive SAW Orthogonal Frequency Coded (OFC) sensors and a wireless interrogation system. Prior to the Phase I activity, wireless, passive sensors which could operate in a multi-sensor environment had not been successfully demonstrated. This is no longer the case. An experimental transceiver test bed has been built in Phase I and wireless temperature sensing has been demonstrated. Using OFC sensors developed by the University of Central Florida (UCF), remote temperature sensing at distances of up to several feet at 250 MHz has been accomplished. Further, work on electrically small antennas (ESA) has demonstrated that antennas more commensurate with the sensor size can be achieved. A smaller sensor/antenna package yields a more flexible sensor solution. Using the results form Phase I, it is proposed that a prototype interrogator be built and operation demonstrated at 915 MHz in a multi-sensor environment.

POTENTIAL NASA COMMERCIAL APPLICATIONS (Limit 1500 characters, approximately 150 words)
A wireless, passive, coded sensor that is rugged, cheap and can be remotely interrogated has multiple applications at NASA. Temperature, pressure and accelaration sensors can be installed on the leading edges of wings to monitor temperature, pressure loss and also provide a profile of the forces on the structure. Additional NASA applications include acceleration sensing for monitoring vehicular acceleration and vehicular vibration, vehicular docking, rotation and directional sensing, tilt control, and fall detection. By exploring the future use of SAW devices for monitoring structural integrity, extreme temperature, extreme pressure, toxic or lethal environments, it is highly probable that the wireless SAW can change the future of Airframe safety and the required/planned maintenance process. This technology can allow the feasible embedment of sensors in key structural components of an airframe for persistent monitoring both during flight and as a post flight analysis. Not only could the structural integrity of the airframe be monitored but other critical states of air flight could be instrumented without the increased cost of weight associated with fiber optic or wired communication.

POTENTIAL NON-NASA COMMERCIAL APPLICATIONS (Limit 1500 characters, approximately 150 words)
Potential Non-NASA commercial include the Automotive Industry (state of health), Civil Engineering (stress management), Chemical and Biological development (toxic safety monitoring) and Refinery process (safety monitoring). The utilization of a wireless SAW device for remote monitoring of hostile environments will become not only technically feasible but also economically feasible based on the extremely low cost associated with the device. By establishing the WSAW as a passive device and the wireless interrogator as the active portion of the link you have enabled an architecture which can support the monitoring of possibly hundreds of SOH sensors per interrogator.
As an example in an automobile the wireless SAW can be deployed as pressure sensors in each tire, liquid contaminant sensors in the fuel and oil supplies, temperature and pressure sensors within the engine, and carbon monoxide sensors within the vehicle. Additionally, highway safety information could be deployed with each informational sign or within construction areas to alert the driver of a status change of speed or other conditions which could be interrogated by the onboard system.

NASA's technology taxonomy has been developed by the SBIR-STTR program to disseminate awareness of proposed and awarded R/R&D in the agency. It is a listing of over 100 technologies, sorted into broad categories, of interest to NASA.

Autonomous Control and Monitoring
Biomolecular Sensors
Fluid Storage and Handling
Launch and Flight Vehicle
Portable Data Acquisition or Analysis Tools
Sensor Webs/Distributed Sensors

Form Generated on 02-10-09 12:09