| 摘要 |
<p>Methods and apparatus for monitoring the compaction of soil material (14-18) in a defined region (10) include hammer structure (22, 60) for impacting soil material in the defined region, a sensor (12) for disposition at the bottom of the defined region that includes a transducer (30 A, B, C, D) for developing an electric signal in response to energy transmitted through soil material from the hammer structure, and a control module (34) responsive to electric signals from the sensor for providing an indication of the quality of compaction of soil material in the defined region.</p> |
