| 摘要 |
<p>PROBLEM TO BE SOLVED: To make precise judgement of the position of a foundation ground. SOLUTION: A judging device 21 for the properties of a ground has a vibration sensor 22, sound sensor 24, and control part 32, among which the sensors 22 and 24 are located over an auger shaft 10. The vibration sensor 22 senses the vibration of the auger shaft while the sound sensor 24 senses the sound emitted by the anger shaft 10. On the vehicle side, a wireless junction machine 31 is installed which receives the sensing signal(s) of the sensor 22/24 and feeds it to the control part 32. The control part 32 is equipped with a receiving antenna 32a and a device body and judges the properties of the ground at the foremost position of the auger shaft from the change of the sensing signal(s). The device body is equipped internally with a receiver 32c connected with the antenna 32a, A/D converter 32d connected with the receiver 32c, a CPU 32e, a memory 32f, and a display 32g.</p> |
