| 摘要 |
PCT No. PCT/SE81/00343 Sec. 371 Date Jul. 23, 1981 Sec. 102(e) Date Jul. 23, 1981 PCT Filed Nov. 25, 1981 PCT Pub. No. WO82/01905 PCT Pub. Date Jun. 10, 1982.The invention refers to a procedure and a device for measuring the degree of compaction attained when compacting a foundation by means of a vibrating compaction tool. The movement of that part of the compaction tool which rests on the foundation is sensed and analyzed. The time interval elapsing between successive passages of the movement signal through the zero point or other reference level is measured. Alternatively, the ratio between the absolute values of the extreme positive and extreme negative values of the motion in relation to the said level is also measured. By means of the relative magnitudes of these time intervals and amplitude relationships respectively a quantity is formed which comprises a measure of the degree of compaction of the foundation. The invention also refers to electronic devices which sense the movement and calculate the time intervals and amplitude relationships and calculate a quantity as a function of these, which comprises a measure of the degree of compaction attained in the foundation. |
