Geophex, ltd. proposes to develop an airborne electromagnetic (aem) system dedicated to the detection of submarines in the ocean (topic no. n87-22, the dod sbir program, 1987). the aem method has recently emerged as a viable technique for airborne charting of water depth (in excess of perhaps 100… More

We propose to develop a hand-held electromagnetic sensor for detecting metallic or nonmetallic underground storage tanks (ust's). existing case histories indicate that the sensor should also be able to map the contaminant plumes in the soil, and possibly, free products floating above the ground… More

The compound 2,3,7,8-tetrachlorodibenzodioxin (2,3,7,8-TCDD) has been called the most toxic compound known to man. 2,3,7,8-TCDD is globally distributed but is found in high concentration at many hazardous waste sites associated with the production and use of chlorinated pesticides/herbicides.… More

The recent advent of a digital, broadhand, hand-held electromagnetic (em) sensor provides an oppurtunity for a significant advance in rapid and meaningful site characterization for depth ranges and conditions where ground penetrating radar (gpr) is ineffective. this proposal presents a feasibility… More

We propose developing a new, portable electromagnetic mine detector. Geophex has previously developed and deployed a new generation of electromagnetic sensors that, with additional improvements proposed in this SBIR, has a strong potential to become the most state-of-the-art electromagnetic mine… More

124 Passive and Active Low-Frequency Electromagnetic Spectroscopy for Airborne Detection of Underground Facilities--Geophex, Ltd., 605 Mercury Street, Raleigh, NC 27603-2343; (919) 839-8515 Dr. I. J. Won, Principal Investigator Mr. Steven J. Daib, Business Official DOE Grant No.… More

In aquifers contaminated by petroleum hydrocarbons, subsurface microorganisms may use ferric iron as an electron acceptor to oxidize dissolved contaminants after oxygen and nitrate are depleted. The available evidence suggests that iron reduction can have significant effects on contaminant… More

124 Passive and Active Low-Frequency Electromagnetic Spectroscopy for Airborne Detection of Underground Facilities--Geophex, Ltd., 605 Mercury Street, Raleigh, NC 27603-2343; (919) 839-8515 Dr. I. J. Won, Principal Investigator Mr. Steven J. Daib, Business Official DOE Grant No.… More

Geophex has prototyped and field-tested a new broadband electromagnetic sensor that has not only proved its detection capabilities but also indicated a tantalizing possibility that it can discriminated targets and, therefore, substantially reduce the false alarm rate. Empirical evidence from the new… More

The interest in detecting hand-carried weapons has significantly increased due to the recent trend toward relaxation of concealed weapons laws. In 1995, the Justice Dept launched a 2.15 million dollar initiative to develop and field-test several concealed weapons detection technologies. The… More

We propose a new broadband electromagnetic (EM) sensor, called GEM-5 (Figure 1), to measure the electrical conductivity of the first 5-10 m of Martian in-situ geology. The depth of exploration may increase with a higher transmitter power. While the sensor can be used for exploring other planets and… More

We propose a new broadband electromagnetic (EM) sensor, called GEM-5 (Figure 1), to measure the electrical conductivity of the first 5-10 m of Martian in-situ geology. The depth of exploration may increase with a higher transmitter power. While the sensor can be used for exploring other planets and… More

We propose a new broadband electromagnetic (EM) sensor, called GEM-5 (Figure 1), to measure the electrical conductivity of the first 5-10 m of Martian in-situ geology. The depth of exploration may increase with a higher transmitter power. While the sensor can be used for exploring other planets and… More

Bioelectric impedance analysis (BIA) is an established technique for measuring body composition, such as body fat and fat-free mass. The BIA method, however, depends sensitively on electrode placement, integrates the tissue impedance over a large volume of the body, andrequires a generic model of… More

"We propose to develop a new technique for imaging underground facilities based on the passive monitoring of acoustic emissions from both stationary and moving equipment within such facilities. It is well known that all mechanical devices, such as motors,gears, etc, emit acoustic signals. It is… More

"We propose a new active broadband electromagnetic (EM) sensor to detect and classify naval mines buried in the littoral. The sensor will work like an underwater metal detector, but it will operate at multiple programmable frequencies suitable to a givenlittoral environment. Once it detects a… More

We propose to further develop a new technique for imaging underground facilities based on the passive monitoring of acoustic emissions from both stationary and moving equipment within such facilities. It is well known that all mechanical devices, such asmotors, gears, etc, emit acoustic signals. It… More

We propose a new active broadband electromagnetic (EM) sensor to detect and classify naval mines buried in the littoral. The sensor will work like an underwater metal detector, but it will operate at multiple programmable frequencies suitable to a given littoral environment. Once it detects a… More

This SBIR Phase I proposal will investigate a new methodology known as electromagnetic induction spectroscopy (EMIS) as a means of detecting and characterizing hidden corrosion in multi-layered airframe structures. This technique, in contrast to traditional single-frequency eddy current methods,… More

Acute head trauma can cause disability and death without prompt diagnosis and treatment. The methods of choice for such diagnosis are x-ray CT or MRI, but these systems are costly and lack portability. Blood has an electrical conductivity and a dielectric permittivity about 50 to 100% higher than… More

This proposal describes an active electromagnetic induction (EMI) sensor array that can operate at a sampling rate of 750Hz, corresponding to 1.4 inches (3.5 cm) in distance at a moving speed of 60 mph. At low frequencies (below a few kHz), an EMI sensor is basically a magnetometer that responds to… More

This project addresses the problem of the wireless transfer of power between a source and nearby mobile platform such as a robotic vehicle. The primary objective of this research will be to design and evaluate, by analysis and computer modeling, an inductively-coupled system consisting of an… More

The goal of this project is to design, build, and test an active electromagnetic induction (EMI) sensor array for detecting and characterizing IEDs. At low frequencies (below a few kHz), an EMI sensor is a magnetometer that primarily responds to susceptibility targets (i.e., ferrous objects). The… More