| 摘要 |
<p>PURPOSE:To judge whether measured data are adequate or not and to search underground buried materials highly accurately, by generating warning when the speed of a towed truck exceeds the preset maximum allowable speed. CONSTITUTION:At first, a moving vehicle is stopped in the vicinity of a region to be searched. A towed truck which is connected with a communication cable is towed. During the movement, a radiowave is transmitted into the underground part through a transmitting antenna. When there is an underground buried material in the soil, the radiowave reflected from the buried material is received through a receiving antenna 6. The signal is sent into a processor 13 in the moving vehicle through the communication cable. At the same time, the signal is sent to wheels for associative movement. When an operator moves the towed truck at a speed faster than an allowance speed too much, a position detecting signal A is inputted in an AND gate 19 from a position detecting circuit 10 during a period wherein an on-measurement signal B is being outputted into the AND gate. Therefore, the output side of the AND gate 19 becomes '1,' and a warning signal (b) is outputted into a pulse-width expanding circuit 20. The result is outputted into a warning device 21.</p> |
