The invention belongs to the technical field of ocean equipment, and particularly discloses an
ocean bottom seismograph, which comprises a shell, an instrument mounting frame, a monitoring device and an auxiliary
recovery device, and the instrument mounting frame comprises a mud blocking plate and a lifting lug; the monitoring device comprises an instrument bin device and an electromagnetic
acoustic release device, the electromagnetic release device is provided with a permanent
magnet and an
electromagnet, and the magnetic force of the
electromagnet and the magnetic force of the permanent
magnet repel each other; and according to the
ocean bottom seismograph adopting the structural design, the counterweight
assembly can be efficiently released through the arrangement of the electromagnetic release device, instrument
recovery is achieved, meanwhile,
electric energy can be saved, and only when the instrument needs to be recovered, the counterweight
assembly needs to be released, and then the
electromagnet needs to be powered. Besides, through the arrangement of the shell and the instrument mounting frame, various problems caused by the adoption of a traditional glass floating ball mode design are effectively solved, then the resistance of the
ocean bottom seismograph is greatly reduced, the
noise reduction level is effectively improved, and then the quality of collected data is improved to a certain extent.