OBN system composition

(1) Main features:

Work normally at any Angle;

Built-in node self-diagnosis system, including registration channel test;

50 days of normal operation;

Foldable design, based on battery unit and sensor unit;

Charge within 12 hours;

Do not prepare more than 10 minutes before repeating the work (replace the battery unit)

OBN size :505*300*145mm

Weight: 26kg

Technical specification

Collector: 4 channels;

Universal type seismometer: BH-20MT-OMNI or GS-ONE OMNI;

Hydrophone: self-made;

ADC resolution: 24 bits;

ADC conversion mode: Delta-Sigma conversion;

Sampling interval: 0.25,0.5,1,2,4ms;

Gain: 0,6,12,18,24,30,36dB;

Maximum input signal: 1.8V(RMS);

Equivalent input noise (2ms,0dB) : <3mV;

Dynamic range: 125dB;

Common mode rejection ratio: >90dB;

Amplitude non-identity: <0.5%;

Cross feed: >100dB(seismometer channel)/90dB(hydrophone channel)

(2) Control containers

Main function

Recharging batteries at seismic nodes on the seabed;

Set parameters for submarine seismic nodes;

Download recorded parameters from the seabed seismic node;

Technical specification

Up to 288 submarine seismic nodes are used together;

Different types of power supply (220V,380V,440V)

Main features of F-OBN system

The submarine seismic node can be operated on shore and underwater, with a maximum depth of 500 meters;

Complete the repreparation within a maximum of 24 hours;

Operating temperature between -10℃ and +50℃;