| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a cable survey method capable of improving detection probability of a survey object cable. <P>SOLUTION: An electromagnetic conversion element 9a is mounted on a survey object cable 31a, and an electromagnetic conversion element 9b is mounted on a cable 31b. A survey signal 22a from a transmitter 2 is applied from the electromagnetic conversion element 9a to the survey object cable 31a, and a survey signal 22b outputted from the transmitter 2 and having a reverse phase to the survey signal 22a is applied from the electromagnetic conversion element 9b to the cable 31b. Each survey signal 22a, 22b having each mutually reverse phase tuned into each cable 31c other than survey object cables 31a and the cable 31b through a board 35 is canceled in each cable 31c. A receiver 10 inputting a survey signal detected by a search coil 17 specifies a cable from which the survey signal is detected as the survey object cable 31a, when the phase of the survey signal is the same as the phase of the survey signal 22a applied to the survey object cable 31a. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
