| 摘要 |
PURPOSE:To measure the density and water content of soil in a short time. very accurately and with simple operations. CONSTITUTION:A central cylinder body 2 having a detector 10 is inserted into the soil, the peripheral part of the cylinder body 2 is excavated by an external cylinder body 3, and a radiation source 15, comprising a radioisotope. installed in the cylinder body 3 is rotated and simultaneously, vertically moved. Consequently, a dosage emitted from the radiation source is detected by the detector 10. |
