| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To make detectable accurately the direction of an underground antenna, namely, the obstacle position, in an underground radar device mounted on an underground excavator used for a non-excavation drilling method or the like. <P>SOLUTION: This underground radar device is constituted so as to detect accurately the rotation angle of the underground excavator, namely, the direction of the underground antenna AT by being equipped with a reference timing pulse generation means S installed on the underground excavator, for detecting the point of time when the rotation angle around its axis becomes a prescribed standard value and generating a reference timing pulse for informing of the effect, and with reference timing pulse processing means ML (signal synthesizing part), FM (frequency modulation part), ST (signal transmitting part) for processing the reference timing pulse. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
