| 摘要 |
<p>A STATE OF THE GROUND IS DETERMINED WITH HIGH PRECISION TO AVOID MISINTERPRETATION OF THE GROUND. A SUBSURFACE EXPLORATION METHOD FOR NONDESTRUCTIVELY VISUALIZING THE GROUND (104) USING THE ELASTIC WAVE (102) INCLUDES: INSTALLING A RECEIVER (124) AND A TRANSMITTER (120) THAT TRANSMITS AN ELASTIC WAVE (102) AT KNOWN POSITIONS OF THE GROUND (104); CAUSING THE TRANSMITTER (120) TO TRANSMIT THE ELASTIC WAVE (102); CAUSING THE RECEIVER (124) TO RECEIVE THE ELASTIC WAVE (102) HAVING PROPAGATED THROUGH A PATH (104A) UNDER THE GROUND (104) FROM THE TRANSMITTER (120) TOWARD THE RECEIVER (124); OBTAINING A DAMPING FACTOR (D) AND A VELOCITY (V) OF THE ELASTIC WAVE (102) HAVING PROPAGATED; SETTING A DAMPING FACTOR THRESHOLD VALUE (DSH) AND A VELOCITY THRESHOLD VALUE (VSH) FOR THE DAMPING FACTOR (D) AND THE VELOCITY (V), RESPECTIVELY; AND COMPARING THE DAMPING FACTOR AND THE VELOCITY TO THE DAMPING FACTOR THRESHOLD VALUE (DSH) AND THE VELOCITY THRESHOLD VALUE (VSH), THUS DETERMINING A STATE OF THE GROUND (104).</p> |
