| 摘要 |
My invention relates to improved method and means for a portable concealed structure locating and surveying apparatus, and more particularly, to a portable device which provides separate operating conditions to best initially locate, then subsequently trace or survey a hidden structure or extended object with a minimum of operator interpretive skill. My invention includes an inductive exciter which couples by indirect connection alternating current energy into the structure which isusually obscured in a covert medium. My invention includes also a portable translator which is, in the locating or spotting mode of operation, operating with gain modulation at a slow periodic rate to enable the use of the full, noise limited, gain capablity of the electronic amplification means. I have further conceived a novel way that the noise thus resulting is used as an aid in the initial locating of the indeterminate structure lay. Subsequently after the structure is located, the translator operates in the surveying mode where-in an indication is provided to the operator indicating the relative position of the unexposed structure by audible or visual means.
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