| 摘要 |
1. Device for transmitting signals between a series of acquisition devices (B1 B2 ...Bn ), each of which being liable to collect signals originating from a seismic sensor or a set of seismic sensors distributed on the field, and a central control and recording system for receiving and recording all of the seismic signals collected by the acquisition devices, the apparatus constituted by the serie of acquisition devices and the central control and recording system being equipped with means for transmission of data by radio and means for transmission of data by transmission cable, said device providing for reliable communication between the central system and particular acquisition devices of the series when direct radio transmission therebetween is impossible, the device including at least one relay element, characterized in that the means for transmission of data by transmission cable comprises a transmission cable, the relay element (2, 11) is equipped with a radio transmitter-receiver set (3, 4) and adaptation means (5, 6) for transforming radio signals received from the central system or the particular acquisition devices of the series and applying them to the transmission cable, and conversely for transforming signals received through the transmission cable from the central system or the particular acquisition devices of the series and applying them to the radio transmitter-receiver set, and in that the transmission cable connects the relay element to the central system or the particular acquisition devices of the series, said relay element being disposed on the field at a place where reliable radio communications can be established between the central system and the particular acquisition devices of the series. |
