| 摘要 |
<p>The device has a receiver (7) placed on a tower crane (1) and equipped with two receiving antennas (12, 13) that are oriented vertically and horizontally, respectively. The antennas (12, 13) are connected to respective demodulators (15, 17) to demodulate the signals received the antennas in order to provide two demodulated signals (A, B). The demodulated signals are provided to a decoder and analyzer (18) for controlling the crane.</p> |
