The invention relates to a vibroseis device for marine geophysical exploration, in particular to a marine electromagnetic type shallow
seismic vibrator system. The
system is formed by a main controller and a vibration generator array. The main controller consists of a CPU, a seismograph
synchronizer trigging unit, a parameter module, an electric level switching module, a
signal generating module and a power amplifying module. The vibration generator array is fixed onto a steel shelf by a fixing substrate. A fixing bracket, magnetic steel, a magnetic polar plate and an iron core are rigidly connected with a housing. Moving coils are fixed on a middle axle of the vibration generator. The middle axle of a vibration generator is connected with a moving substrate. The moving coils are connected with a
load bearing spring by aluminum
alloy. The
load bearing spring is fixed onto the housing through rivets. A supporting spring which is connected with the moving substrate by bolts is fixed onto the steel shelf through the bolts. The
system is comparatively high in scanning frequency section of
signal up to 1 to 1500Hz, good in
repeatability of the
signal, and optimal in the energy output of the vibration generator. The system meets the requirements of
high resolution earthquake exploration at marine shallow
layers and solves the influence of marine earthquake exploration carriers on seismic focus.