| 摘要 |
<p>PURPOSE:To search bamboo shoots in the ground by giving vibrations to a mother bamboo so that a bamboo shoot connected with the bamboo with an underground stem can be vibrated in the ground and detecting the vibration radiated from the bamboo shoot into the ground in the ground or on the ground surface. CONSTITUTION:An exciter 2 is fitted to a mother bamboo 1 and, at the same time, a vibration detecting machine 7 is set on the ground surface 6. The exciter 2 gives mechanical vibrations to the bamboo 1 so as to vibrate a bamboo shoot 4 connected with the bamboo 1 with an underground stem 3. Since the vibration radiated from the bamboo shoot 4 under the ground 5 is not damped much because the bamboo shoot 4 is nearer to the ground surface than the underground stem 3. Therefore, the vibration of the underground stem 3 can be detected as the strong vibration and the position under the ground 5 or the ground surface 6 can be detected with the detecting machine 7. Since the weak leakage of vibrations are also detected from the underground stem 3, it is not necessary to search the bamboo shoot 4 over a wide area on the ground surface 6, but the bamboo shoot 4 can be searched efficiently along the underground stem 3 extended from the mother bamboo 1.</p> |
