| タイトル | Coal-shale interface detector |
| 本文（外部サイト） | http://hdl.handle.net/2060/19800015220 |
| 著者（英） | Reid, H., Jr. |
| 著者所属（英） | NASA Marshall Space Flight Center |
| 発行日 | 1980-04-01 |
| 言語 | eng |
| 内容記述 | A coal-shale interface detector for use with coal cutting equipment is described. The detector consists of a reciprocating hammer with an accelerometer to measure the impact of the hammer as it penetrates the ceiling or floor surface of a mine. Additionally, a pair of reflectometers simultaneously view the same surface, and the outputs from the accelerometer and reflectometers are detected and jointly registered to determine when an interface between coal and shale is being cut through. |
| NASA分類 | EARTH RESOURCES AND REMOTE SENSING |
| レポートNO | 80N23711 |
| 権利 | No Copyright |
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