The Jiaolong manned submersible takes you to explore the wonderful life in the deep sea!

1.It has the largest diving depth of its kind in the world at 7,000 meters, which means that the submersible can be used in a vast area of the world's oceans;

2.It has a stable hovering for the operation target, which provides a reliable guarantee for the submersible to complete the high-precision operation task.

3.It has advanced underwater acoustic communication and seabed micromorphology detection capabilities, which can transmit images and voices at high speed and detect small targets on the seabed;

4.Equipped with a variety of high performance, it ensures that manned submersibles can complete complex tasks such as fidelity sampling and submersible drilling and coring under special marine environments or seabed geological conditions. Near-bottom automatic navigation and hovering positioning, high-speed underwater acoustic communication, and oil-filled silver-zinc battery capacity are known as the three major technological breakthroughs of the "Jiaolong".

1.It can be "fixed" steadily

Just like driving a car, the driver's feet are always on the accelerator, which inevitably causes fatigue. The pilot of the Jiaolong is fortunate in that it has an automatic navigation function, and after the pilot sets the direction, he can rest assured that he can observe and conduct scientific research.

Wang Xiaohui said that the "Jiaolong" can complete three kinds of automatic navigation: automatic directional navigation, after the pilot sets the direction, the "Jiaolong" can automatically sail without worrying about deviation; Automatic altitude setting navigation, this function can allow the submersible to maintain a certain height with the seabed, despite the undulation of the submarine mountain, the automatic altitude setting function can make the "Jiaolong" easily navigate in a complex environment to avoid collision; The automatic depth fixing function can keep the "Jiaolong" at a fixed distance from the sea surface.

2.Hover positioning.

Once the target is found on the seabed, the "Jiaolong" does not need to sit on the bottom like most foreign deep submersibles, but the pilot drives to the corresponding position, "fixes" the position, and maintains a fixed distance from the target, which is convenient for the manipulator to operate. Under the internal and external interference caused by submarine currents and other causes the "Jiaolong" to sway, and the movement of the manipulator drives the entire submersible to shake, it is commendable to be able to accurately "hover". In the published information, no foreign deep submersible has yet been equipped with similar capabilities.

3.Deep-sea communication relies on "sound".

Land communication relies mainly on electromagnetic waves, which can reach the speed of light. But this weapon is useless in the water, and the electromagnetic waves can only penetrate a few meters in the seawater. In order to maintain contact with the mother ship, scientists have developed a high-speed underwater acoustic communication technology with the world's advanced level, using sonar communication.

This technology needs to solve a number of problems, such as the underwater acoustic propagation speed is only about 1500 meters per second, if it is 7000 meters deep, it takes nearly 10 seconds to shout a sentence back and forth, and the sound delay is very large; The bandwidth of acoustic transmission is also extremely limited, and the transmission rate is very low; In addition, the propagation effect of sound in uneven objects is not ideal, and the density of seawater is different, the temperature is different, the seabed echo conditions are also different, and the noise on the mother ship and deep submersible makes it more difficult to effectively extract signals in complex environments.

Jiaolong manned deep submersible is China's first self-designed and integrated deep-sea manned submersible, with a maximum design depth of 7,000 meters, and it is also the world's deepest operational manned submersible. Jiaolong can be used in the vast sea area of the world's oceans, which is of great significance to China's development and utilization of deep-sea resources.

The main technical features of the Jiaolong manned submersible are:

1) It has the largest diving depth of its kind in the world - 7000 meters, which means that the submersible can be used in vast sea areas accounting for 99% of the world's ocean area.

2) It has the ability to hover and locate stably for the operating target, which provides a reliable guarantee for the submersible to complete high-precision operation tasks.

3) It has advanced underwater acoustic communication and seabed micro-terrain and geomorphology detection capabilities, which can transmit images and voices at high speed and detect small targets on the seabed.

4) Equipped with a variety of high-performance operating tools to ensure that the manned submersible can complete complex tasks such as fidelity sampling and submersible drilling and coring under special marine environment or seabed geological conditions.

China is the fifth country in the world, after the United States, France, Russia, and Japan, to master the technology of manned deep diving at great depths. Among the world's manned submersibles, "Jiaolong" belongs to the first echelon.

In 2002, China's Ministry of Science and Technology listed the development of deep-sea manned submersibles as a major special project of the National High-tech Research and Development Program (863 Program), and started the self-design and integrated development of the Jiaolong manned deep-sea submersible. From 2009 to 2012, Jiaolong successively achieved successful sea trials of 1,000 meters, 3,000 meters, 5,000 meters and 7,000 meters. In July 2012, Jiaolong set a Chinese manned deep diving record of 7,062 meters in the Mariana Trench test sea area, and also set a record for the largest diving depth of similar operational submersibles in the world.

This means that China has the ability to carry people to more than 99.8% of the world's ocean depths for operations. On December 18, 2014, Jiaolong made its first dive in the Indian Ocean. On January 14, 2015, Jiaolong carried out the last dive of the first leg of the Indian Ocean scientific expedition in the Longyi hydrothermal area of the southwest Indian Ocean, which was also the ninth dive of the Jiaolong in this segment.

After the completion of this dive, Jiaolong will take the mother ship to berth in Mauritius for replenishment, and then continue to carry out the diving mission 2 of the second leg of the Indian Ocean scientific expedition in the southwest Indian Ocean. On March 17, Jiaolong took the ship "Xiangyanghong 09" to dock at the National Deep-sea Base Wharf, officially settled in Qingdao, no longer from Jiangyin, can take the mother ship from Qingdao 3.

Jiaolong Potato carries the vast majority of macro oak submersibles.

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Test question analysis: The liquid pressure increases with the increase of depth, so the pressure of the water increases during the dive.

The pressure of the seawater at a depth of 7000m is: <>

After the submersible is completely submerged, with the increase of the diving depth, the depth h also increases, and according to p= gh, the pressure of the bottom of the submersible becomes larger.

The pressure of the seawater at a depth of 7000m:

p=ρgh=

kg/m310n/kg×7000m=

pa So the answer is: get bigger; pa．

Analysis of increased test questions: the liquid pressure is related to the density and depth of the liquid, the depth of the same liquid increases, the pressure increases, so the pressure of the water on the "Jiaolong" will increase with the increase of the diving depth; From the meaning of the title: the density of seawater is = 3

kg m3 depth h = 5000m and g = 10n kg, then the pressure generated by the seawater is p = hg = 3

kg/m35000m×10n/kg=pa。