| 摘要 |
A method for echo-locating underground structures, such as piping, by launching a series of acoustic impulses into the ground to insonify the structures in an area where the structures are believed to be buried, detecting acoustic echoes returned from the insonified structures and displaying the returned echo data in such a manner that the oldest sequence of echo signals appears in an upper portion and the newest in a lower portion of the display.
|
