OPTICAL PULSE INDUCED ACOUSTIC MINE DETECTION

An underground object detector can locate and identify the shape of underground objects using a pulsed laser (12) to generate acoustic waves in soil. A remotely located microphone detects an acoustic signal (24) between the soil surface and subsurface objects (18). The amplitude of this acoustic sig...

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Bibliographic Details
Main Authors LINDBERG, SCOTT, C, DIMARZIO, CHARLES, A, MCKNIGHT, STEPHEN, W
Format Patent
LanguageEnglish
French
Published 17.06.1999
Edition6
Subjects
ACOUSTICS
ACOUSTICS NOT OTHERWISE PROVIDED FOR
ANALOGOUS ARRANGEMENTS USING OTHER WAVES
DETECTING MASSES OR OBJECTS
DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES
GEOPHYSICS
GRAVITATIONAL MEASUREMENTS
LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES
MEASURING
METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL
MUSICAL INSTRUMENTS
PHYSICS
RADIO DIRECTION-FINDING
RADIO NAVIGATION
SOUND-PRODUCING DEVICES
TESTING
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Summary:An underground object detector can locate and identify the shape of underground objects using a pulsed laser (12) to generate acoustic waves in soil. A remotely located microphone detects an acoustic signal (24) between the soil surface and subsurface objects (18). The amplitude of this acoustic signal is correlated with the position of the laser beam source (14) and output on a visual display, resulting in an acoustic map of the ground (26). A raster scanning of the suspect ground in the vicinity reveals the shape of the underground object, allowing the operator to discriminate benign and natural objects. L'invention se rapporte à un détecteur d'objets souterrains qui peut localiser et identifier la forme d'objets souterrains au moyen d'un laser pulsé permettant de générer des ondes acoustiques dans le sol. Un microphone situé à distance détecte un signal acoustique entre la surface du sol et les objets situés sous la surface. L'amplitude de ce signal acoustique est corrélée à la position de la source du faisceau laser et affichée sur un afficheur, ce qui se traduit par la formation d'une carte acoustique du terrain. Un balayage ligne par ligne du terrain suspect aux alentours révèle la forme de l'objet souterrain, ce qui permet à l'opérateur de différencier les objets naturels et les objets bénins.
Bibliography:Application Number: WO1998US17761