Invenzione della NASA per scoprire oggetti sepolti

Notizia di Bill Eidson
I saw notice in the February 2006, NASA Tech Briefs of a new invention for detection of buried objects. Note that the same technology perhaps could be used to detect cavities. The following is a reply I received from Mark Saulich for additional information. Mark Saulich states he can assist anyone with contacting the author of the article.

— Bill Eidson

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Contact:


Mark Saulich
Introduction Manager
yet2.com
175 Highland Avenue
Needham, MA 02494
781-972-0615
msaulich@yet2.com
Buried Object Detection System

This invention relates to a buried object detection system. For a variety of purposes it is desirable to detect the presence of buried objects including categories.

Technology Benefits Description

This system according to the present invention has the advantage that no transmitter is required and moreover it affords the capability of detection buried objects including cavities which may be difficult, if not impossible, to detect with any other system.

Long Description

According to the present invention, a buried object detection system comprises of a directional antenna, which in use is positioned and arranged so as to receive signals radiated from the ground, a low noise amplifier fed from the antenna, an amplitude detector is fed from the low noise amplifier, a further amplifier is fed from the detector and arranged to feed an indicator which provides a signal indicative of the presence of a buried object, in dependence upon a signal radiated from the ground and received by the antenna.

It is well known that all objects radiate electromagnetic signals at radio frequencies, this radiation is caused by the endless motion of molecules which compose all matter and is proportional to the temperature of the object. Thus, signals are continuously radiated from the ground and the character of the signals is deteremined by the general character and density of the ground, and what may lie beneath the surface. A system according to the present invention detects signals radiated from the ground, and signal level variations from a nominal value provide an indication of the
presence of a buried object.

It has been found that the signal level detected varies slightly from a nominal value according to the density of the ground and what may lie beneath the surface of the ground. Thus, objects beneath the ground and uncharacteristic dry/wet patches or cavities associated therew with a readily detectable. It is significant and interesting that if the horn
antenna is pointed skyward, the signal detected falls markedly in amplitude.
This is because the temperature of the sky is about 6°K whereas the temperature of the ground is normally 300°K. The noise contribution from the block is equivalent to a temperature of about 30°K which is small compared with the level of signals radiated from the ground due to the temperature of 300°K.

Various modifications may be made to the arrangements shown without departing from the scope of the invention, and for example any suitable antenna having directional capabilities and suitable for the frequency band of interest may be used.

Similarly, any suitable indicator device may be used providing visual and/or audible signals.

Collaboration Type Sought