| 摘要 |
<p>The present invention aims at providing a method and a device for guiding the cable burying device along the cable effectively as well as accurately even if the cable should be reburied after repairment. The present invention is mainly characterized in that an ultrasonic command signal transmitted from an ultrasonic transmitter/receiver mounted upon the cable burying device is received by an ultrasonic, transponder which has been mounted on the cable. An ultrasonic signal is transmitted in turn from said ultrasonic transponder to be received by said ultrasonic transmitter/receiver so that the position of said ultrasonic transponder on the cable is detected by processing such signals. The present invention is further characterized in that four ultrasonic wave receiving elements are arranged in a square form and in parallel with a horizontal face in the cable burying device, that an ultrasonic transmitter/receiver element is provided at the center of the square, that a support frame is mounted on the outer periphery of the cable, that a rotating member is provided to be freely rotatable via bearings on the outside of the support frame, that an ultrasonic wave transmitter/receiver element is provided on said rotating member.</p> |
