Hilti Aktiengesellschaft

Stefan Liedtke

Harald Schmitzer

Stefan Tichy

Klaus Dass

John Ewen

A radar detector for exploration of subsurface embedded objects comprising an antenna array ( ) for high-frequency electromagnetic waves, which is connected and individually switchable with at least one transmit/receive unit, a time-controlled signal processor, an evaluation device for SAR and a display device. The antenna array ( ) exhibiting at least three antennas (sx, rx, sy, ry) scanning an area by their positioning.

Subsurface exploratory radar detector for a hand tool device

A method of detecting foreign bodies in a medium with a radar having a transceiver, and including emitting a radar wave through a wall surface into the medium with the transceiver, detecting a radar signal reflected in the medium, pre-processing the reflected radar signal and subjecting the pre-processed radar signal to evaluation and assessment, determining a characteristic of a foreign body at a stationary position of the transceiver with an algorithm which is based on a pre-processed, digitalized receivable signal, which characteristic permits to recognize differences between a shape of the reflected radar signal and stored comparison values, and conducting a comparison assessment of the shape differences of the reflected signal against predetermined threshold values.

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Lafayette, CA, United States of America

Stefan Liedtke