| 摘要 |
1,159,421. Seismic survey computation. MOBIL OIL CORP. 26 July, 1966, No. 33488/66. Heading G4G. [Also in Division H4] An analogue computer for the time-domain processing of seismic data (see Division H4), comprises a delay drum 50 and playback heads 55-60 which apply incremental delays to an input signal at 65. The delayed signals are combined, with appropriate polarities and weighting factors, by means of polarity selector switches 55-60Na, pre-set gain amplifiers 55b-60Nb and mixer 70. |
