Volume 8, Number 6     November/December 2000

Moving Forward



Technology Opportunity Showcase

left


Technology Opportunity Showcase highlights some unique technologies that NASA has developed and which we believe have strong potential for commercial application. While the descriptions provided here are brief, they should provide enough information to communicate the potential applications of the technology. For more detailed information, contact the person listed. Please mention that you read about it in Innovation
.

Neural Net Navigation Tool

NASA is seeking industrial partners to continue the testing effort and license for commercialization of a neural net navigation tool, a self-contained onboard mobile vehicle navigation system. The system was developed to guide a robot through constrained pathways, but could potentially be used in a much broader range of applications. It allows for the autonomous navigation of virtually any mobile vehicle (such as a robot, truck, automobile, boat or airplane) that moves in an environment that is delimited by a boundary.

Unlike other mobile vehicle navigation systems, this invention utilizes neural network technology to determine the position and angular orientation of the vehicle without the need for large software programs and costly computing platforms required by conventional navigation systems. Neural networks are high-speed parallel processing electronic circuits modeled after the way neurons are connected in the human brain.

The mobile vehicle is first placed in a localized area where it collects position information using range sensors. This process is repeated for several localized areas, until the vehicle's entire operating range has been mapped.

The system is cost-effective, autonomous, continuously calibrated and easily adaptable. Potential commercial uses include use as industrial surveillance robots, material storage and handling robots, hospital delivery robots, entertainment robots, autonomous navigation of automobiles and augmentation of GPS navigation systems.

For more information, contact James Cameron, NASA Johnson Space Center. Call: 281/483-1749, E-mail: james.l.cameron1@jsc.nasa.gov Please mention you read about it in Innovation.

UV/IR Hydrogen Flame Detector

NASA Kennedy Space Center is seeking companies to license a new ultraviolet/infrared (UV/IR) hydrogen flame detector for commercial use. This development is a multispectral, digital signal-processing driven flame detector capable of sensing a flame from many sources caused by the ignition of hydrogen gas, and potentially other compressed gases. Commercially available flame detectors are prone to troublesome false alarms from reflections of the large flare stack that is continuously lit during Space Shuttle external tank fueling operations.

This technology was developed to produce a device immune to false alarms and capable of reliably detecting a small hydrogen flame. The detector unit's capabilities include interfacing with a computer to allow manual changes of the cross-correlation thresholds, sensor amplifier gains and sensitivity thresholds. The UV/IR flame detector is immune to false alarm situations by detecting attributes that are characteristic of an actual flame, while rejecting characteristics from flame reflections or scattered light.

Potential commercial uses include the petrochemical, power generation and aviation/aerospace industries, gas and electronic manufacturers, and research laboratories.

For more information, contact Thomas Gould at NASA Kennedy Space Center. Call: 321/867-6238, E-mail: thomas.gould-1@ksc.nasa.gov Please mention you read about it in Innovation.

Microfabricated Gas Sensors

NASA Glenn Research Center (GRC) is actively seeking industrial partners to cooperatively further the development of high-temperature sensor technology and to develop applications for hydrogen sensor technology. The sensors allow in situ measurement of gases relevant to safety, emissions and chemical processing. They function in environments where conventional sensors are inoperable. They can be mass-produced through silicon-based device fabrication technology. Their minimal size, weight and power consumption give designers lots of flexibility.

Three types of the sensors are being developed: leak sensors (including hydrogen), emission sensors (including high temperature gas sensors) and fire detection sensors. GRC, in conjunction with Case Western Reserve University, is developing a family of microfabricated high-temperature gas sensors to provide accurate and reliable detection of hydrocarbons, nitrogen oxides, carbon monoxide, carbon dioxide and oxygen. Compared with conventional sensors, these devices often have superior high-temperature performance, chemical resistance and mechanical toughness. Silicon-processing technology reduces the cost of fabrication. Integration of these sensors into an array, effectively a high-temperature electronic nose, is an active project of the Glenn Micro-systems Initiative.

These sensors have been applied in a variety of environments, from the assembly line at Ford Motor Company to demonstration flights on the Space Shuttle.

For more information, contact Gary Hunter at NASA Glenn Research Center. Call: 216/433-6459, E-mail: gary.w.hunter@grc.nasa.gov Please mention you read about it in Innovation.

 




NASA Official: Jonathan Root

Web Designer: Joel Vendette

Credits