Atkinson G.M. – TechConnect Briefs

Temperature and Strain Coefficient of Velocity for Langasite SAW Devices

Wilson W.C., Atkinson G.M., NASA Langley Research Center, US

Surface Acoustic Wave sensors on Langasite substrates are being investigated for aerospace applications by NASA’s Vehicle Systems Safety Technologies (VSST) project. Strain sensors are being developed using the Langasite. Characterization of the Langasite material properties [...]

Temperature and Strain Response of a Surface Acoustic Wave Sensor

Wilson W.C., Atkinson G.M., NASA Langley Research Center, US

A new multifunctional temperature and strain sensor is being investigated. The new sensor is based upon Surface Acoustic Wave (SAW) technology on a Langasite substrate. SAW sensors can be developed that respond to changes in [...]

Space Applications for Wireless Sensors

Wilson W.C., Atkinson G.M., NASA Langley Research Center, US

Reducing the weight of spacecraft will reduce both fabrication and launch costs. The elimination of wiring and wiring harnesses reduces the total mass of the vehicle. Wireless sensor technology can reduce the weight and therefore [...]

Modeling of a Surface Acoustic Wave Strain Sensor

Wilson W.C., Atkinson G.M., NASA Langley Research Center, US

NASA’s Integrated Vehicle Health Monitoring (IVHM) project is investigating new detection technologies that will increase aviation safety by monitoring the structural health of aerospace vehicles during flight. These new technologies must be rugged, light weight [...]

A Comparison of Surface Acoustic Wave Modeling Methods

Wilson W.C., Atkinson G.M., NASA Langley Research Center, US

Surface Acoustic Wave (SAW) technology is low cost, rugged, lightweight, extremely low power and can be used to develop passive wireless sensors. For these reasons, NASA is investigating the use of SAW technology for Integrated [...]

Design and Simulations of a Microfluidic Pump with Multiple Vibrating Membranes

Koombua K., Pidaparti R.M., Longest P.W., Atkinson G.M., Virginia Commonwealth University, US

A novel design of a micropump with multiple vibrating membranes has been developed in this study. The micropump consists of three nozzle/diffuser elements with vibrating membranes, which are used to create pressure difference in the [...]

Frequency Domain Modeling of SAW Devices

Wilson W.C., Atkinson G.M., NASA Langley Research Center, US

The lack of integrated design tools for MEMS devices in general, and for Surface Acoustic Wave (SAW) devices specifically, has led to the development of tools that will enable integrated design, modeling, simulation, analysis and [...]

Parameterizable Library Components for SAW Devices

Wilson W.C., Atkinson G.M., NASA Langley Research Center, US

The lack of integrated design tools for SAW devices has led us to develop tools that in the future will enable integrated design, modeling, simulation, analysis and automatic layout generation of Surface Acoustic Wave (SAW) [...]

Modeling of an Electroactive Polyimide Ultrasonic Wave Sensor for Aerospace Applications

Wilson W.C., Atkinson G.M., Perey D.F., Scott M.A., Tedjojuwono K.K., NASA LaRC, US

We have modeled a new, low cost polyimide Capacitive Micromachined Ultrasonic Transducer (CMUT) device constructed using a polyimide membrane. This paper presents the preliminary results of the electromechanical modeling of this new device. Polyimide was [...]