China has the mission of becoming the dominant superpower of the world by 2049. It demonstrates it in commerce, in technology, in artificial intelligence and also in the military section. Recently, scientists from Jiao Tong University in Shanghai created a new detection system that pErythe submaran submarine better than any other existing technology. This indirect electromagnetic signal monitoring approach will perceive the weakest submarines. But now China has taken another step.
A team of scientists from the Northwest Polytechnic University (NPU) in Xian claim to have developed a method to detect even the quieter submarine ships Taking advantage of the magnetic fields generated by its stelae, a discovery that could redefine the naval war.
Directed by Wang Honglei, the team modeled the Stela Kelvin, a superficial disturbance in the form of V created by the submarines when crossing the water. This wake, previously studied for the detection of radar -based images, It generates a weak, but detectable magnetic field when seawater ionsdisturbed by the movement of the ship, interact with the geomagnetic field of the Earth.
Through numerical simulations, the researchers quantified how these magnetic firms vary with the speed, depth and size of a submarine. For example, if the speed is increased by 2.5 meters per second, the magnetic intensity is multiplied by ten; If depth is reduced by 20 meters, the intensity of the magnetic field is doubled. The longest submarines produce weaker fields, while the wider helmets amplify them.
For a seawolf class submarine that travels to 24 knots already 30 meters deep, the magnetic field of the wake reaches 10⁻¹² Teslas,“Very within the Magnet sensitivity rangeeitherexisting airborne meters“secorN Wang.
The team method, published in Journal of Harbin Engineering University, exploits a critical vulnerability: “Kelvin’s steles cannot be silenced.”
According to the study, the device is the size of a truck and the equipment tested it in a deep sea bed of the South China Sea. Submarines generally detect other submarines using a sonar, which emits sound waves and analyzes the echoes that are reflected in underwater objects. However, This detector does not use to sound. Rather, it depends on an antenna that detects low frequency EM waves that underwater propellers generate with each rotation. When the waves come into contact with the seabed, they continue to move through the rock. They do not weaken as fast in the seabed as they do in seawater, so the detection is easier at greater distances.
Marine geologists They already use this low frequency detection method to find oil and gas depositsbut this is the first time that this technique for the detection of submarines is used.
To make a more sensitive detector, the team created an algorithm that differentiates between underwater signals and marine life. Until now, it has managed to detect surface boats, about 3 km away. The researchers were able to track the steles of the ships that passed and analyze them to determine what type of ships were.
If this detection system reaches that objective, It will help China’s submarines to potentially manage and threaten other submarines at farther distances of what is currently possible.
The advance would be part of the Chinese project to create several anti -submarine systems, in an effort that Beijing calls the “great underwater wall.” Their detection methods are sophisticated and become more complex every year.