Communications – electrical: acoustic wave systems and devices – Echo systems
Patent
1996-12-05
1998-05-19
Pihulic, Daniel T.
Communications, electrical: acoustic wave systems and devices
Echo systems
367138, G01S 1500
Patent
active
057544948
ABSTRACT:
A hand-held prodder capable of distinguishing inert rock from potentially hazardous landmines or other unknown objects. The prodder comprises a rod which is placed into contact with an object. A high frequency acoustic or incident wave is introduced into rod and travels along the rod to the object where it is reflected back towards the piezoelectric crystal. The piezoelectric crystal converts the reflected wave to an electric signal and a signal processor determines values representative of the frequency-time-amplitude characteristics of the object. Different materials exhibit different mechanical impedances and frequency damping characteristics. By comparing reflected wave characteristics to pre-determined characteristics for known materials, inert rocks and potentially hazardous plastic or metallic objects are distinguishable. Visual or audible signals inform the user whether rock (safe) or unidentified or known hazardous object were contacted.
REFERENCES:
patent: 4021725 (1977-05-01), Kirkland
patent: 5159838 (1992-11-01), Lynnworth
"Impact Dynamics: The Split Hopkinson Pressure Bar" By Zukas et al., A Wiley-Interscience Publication, John Wiley & Sons, pp. 287-332.
"Split Hopkinson Pressure Bar Apparatus Overview and Simple Analysis" By Gallagher, Defence Research Establishment, Quebec, Canada, Jan. 1990, pp. 1-25.
"A Mechanical Means of Land Mine Detection--Winning Land Mine Detection Project", University of Alberta, CSME's National Competition, May 1996.
Her Majesty in right of Canada as represented by the Minister of
Pihulic Daniel T.
LandOfFree
Characteristic discriminating landmine hand prodder does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Characteristic discriminating landmine hand prodder, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Characteristic discriminating landmine hand prodder will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1860047