Near-sea-bottom hydrate detection system

A near-sea-bottom hydrate detection system, comprising a ship-borne part, a towing body, and a deep-towing part, wherein

• the ship-borne part comprises a comprehensive monitoring host, configured to send an acquisition triggering pulse signal, and transmit the signal to the deep-towing part;
• and receive near-sea-bottom information acquired by the deep-towing part, and determine a near-sea-bottom condition according to the near-sea-bottom information;
• and
• the deep-towing part comprises:
• a multi-channel data-acquisition electronic unit;
• a data acquisition unit configured to acquire near-sea-bottom information at a current position according to the acquisition triggering pulse signal, the data acquisition unit comprising a digital receiving cable connected to the multi-channel data-acquisition electronic unit and configured to (i) receive reflection information from a near-sea-bottom strata when seawater is vibrated and (ii) send the reflection information to the multi-channel data-acquisition electronic unit, the digital receiving cable comprising:
• a towrope main body;
• a hydrophone array, the hydrophone array (i) disposed in the towrope main body at equal intervals and (ii) configured to receive a reflected wave from the near-sea-bottom strata;
• an array interval monitoring module, the array interval monitoring module (i) configured to monitor an array interval of the hydrophone array and (ii) send the array interval to the multi-channel data-acquisition electronic unit such that the multi-channel data-acquisition electronic unit performs arrangement according to a monitored hydrophone array condition;
• and
• an array depth control module configured to control an arrangement depth of the hydrophone array;
• and
• an electric spark vibration source, configured to generate an electric spark vibration signal according to the acquisition triggering pulse signal, to vibrate the seawater,
• wherein the multi-channel data-acquisition electronic unit is connected to the comprehensive monitoring host, the data acquisition unit, and the electric spark vibration source separately, and the multi-channel data-acquisition electronic unit is configured to (i) transmit the acquisition triggering pulse signal to the electric spark vibration source and the data acquisition unit and (ii) transmit the near-sea-bottom information acquired by the data acquisition unit to the comprehensive monitoring host,
• and wherein the deep-towing part is fixed on the towing body and a structure of the towing body is designed to be a semi-open type, and the towing body is transparent from top to bottom.