Based on the actual needs of marine monitoring, this project develops a submarine standard system for monitoring electromagnetic noise in the marine environment. On the one hand, it provides new means for submarine monitoring so that submarines can not hide. On the other hand, it provides new methods for marine environment detection and promotes high-speed development in related fields.

Key core technologies:

1. Expansion, contraction and recovery and deployment technology of underwater measurement antennas: Different deployment and recovery methods are adopted for different working conditions to ensure the safety, simplicity and reliability of the deployment and recovery process of submersible and buoy.

When the water depth is shallow, the anchoring method is mainly used. During anchoring conditions, both the buoy and the submersible are positive buoyancy and are anchored on the seabed respectively. An umbilical connection with a spherical float is used between the buoy and the submersible target to isolate the linkage between the buoy and the submersible target. The buoy and submersible mark are equipped with acoustic release devices. After the work is over, the submersible mark separates from the anchoring weight and floats upwards.

When the water depth is deep, the floating method is mainly used. During floating conditions, the submersible mark is adjusted to zero buoyancy. The volume of the airbag is changed by the automatic depth determination system, and the automatic depth determination of the submersible target is realized by cooperating with the pressure sensor. The buoyancy material and ball hinge design at the top of the submersible target can always keep the submersible target upright. During recycling, the submersible mark can float up after throwing ballast lead blocks.

When the system is in towing condition, the stern uses nylon ropes to drag the buoy forward. The universal frame on the submersible can keep the submersible in an upright state.

2. Underwater attitude control technology for submersible target system:

The attitude stability of the submarine target under floating state requires both self-adjustment and auxiliary adjustment of the submarine target. Self-adjustment refers to improving the stability of the standard itself by reasonably designing the antenna's line shape and center of gravity position of the center of buoyancy. Auxiliary adjustment refers to adjusting the posture of the target body with the help of external force. Frequent working of the motor will generate electromagnetism and interfere with instrument measurements. Traditional propeller positioning is not applicable in this project. Therefore, the underwater attitude control technology of the submersible target system is mainly divided into the following points:

1) Exterior design and equipment layout of the submersible target. Reasonably design the shape of the submersible target to reduce the impact of incoming current on the submersible target. Design the tail fin to prevent the submarine from rotating. Reasonably design the equipment layout, determine the relative position of the center of gravity of the center of buoyancy, and improve the stability of the submersible target itself.

2) Anti-roll and pitch stability system for submersible target. Buoyant materials are made into buffers and placed on top of the submersible, and the damping in the water is used to slowly isolate the influence of the umbilical on the submersible.

3) Heave control technology using liquid bladder as adjusting mechanism. The buoyancy of the standard body is changed by the change of the volume of the liquid sac, thereby realizing the heave and sinking movement of the standard body. This design only requires a limited number of adjustments to the liquid bladder to well control the depth of the submersible target, avoiding frequent operation of the motor and affecting the normal work of the data acquisition equipment.

3. Submarine environmental field measurement technology

This project is to measure the target field, which requires the submersible target to be in a suspended state and does not need to be arranged in an array. A single submersible target has good concealment. In addition, various seawater depths can be measured under floating conditions, and the measurement position can be easily changed under towing conditions, which is highly applicable.

Application situation or application prospects: With the gradual maturity of sea and deep sea scientific research and resource exploration, it can also be applied to underwater oil and gas mining, deep sea mining, deep sea biological research, military submarine monitoring and other fields. This kind of technology has broad application prospects, good economic and social benefits, and will further promote the development of my country's deep-sea monitoring equipment technology and the progress of scientific and technological level.