| 摘要 |
<p>PURPOSE:To measure the positions easily by providing transmission devices, receiving devices, detecting devices to detect either the phase difference or the transmission time, and an operation device, in two underground excavators excavating in the opposite direction each other. CONSTITUTION:While the signal of a signal generator 1 is transmitted to transmitters Ta, Tb, and Tc provided in the first underground excavator A through a transmitter converter 2, the signal is input to phase detectors PDa, PUb, and PDc connected to receivers Ra, Rb, and Rc of the second underground excavator B. And when an electromagnetic wave selected by the transmitter converter 2 is delivered, the phase differences alphatr between the signals received by the receivers Ra, Rb, and Rc, and the signal delivered from the generator 1 are detected by the detectors PDa, PDb, and PDc, the phase differences are input to an operation device 3, and the distances between the receivers are computed. Consequently, the measurement can be carried out easily.</p> |
