Patent ID: 7355410

Claim:
A handheld scanning subsurface detector, comprising: a handheld housing ( 5 ); a detector module ( 2 ) located in the housing ( 5 ); computing means ( 3 ) located in the housing ( 5 ); guide means ( 7 ) for guiding the detector module ( 2 ) over a to-be-analyzed wall surface ( 6 ) at a predetermined distance therefrom; at least one path sensor ( 8 ) connected with the computing means ( 3 ) for sensing the to-be-analyzed wall surface ( 6 ) and a path of the guide means ( 7 ) moving over the to-be-analyzed wall surface ( 6 ); and controlling means ( 9 ) connected to the path sensor ( 8 ) and to the detector module ( 2 ) for responding to the sensing of the to-be-analyzed wall surface ( 6 ) by the path sensor ( 8 ) to initiate a detection measurement by the detector module ( 2 ).