SEISMIC SIGNAL RECORDER Russian patent published in 2003 - IPC

FIELD: detection and recording of seismic signals. SUBSTANCE: seismic signal recorder includes two geophones, analog-to-digital converter, control unit, permanent storage, final storage circuit, timer, buffer storage unit and former of calibration signal. It is supplemented with N geophones, 3N amplifiers, digital filter, amplification control unit and frequency former. First, second and third outputs of each N-th geophone are correspondingly connected to first inputs of 3N-2, 3N-1, 3N amplifiers which outputs are connected to each 3N-th input of analog-to-digital converter, output of former of calibration signal is connected to (3N+1)-th input of each N-th geophone. EFFECT: raised accuracy of seismic signal 4 dwg recorder.