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Could a tiny Chinese magnetic sensor be up to the huge task of tracking submarines?
Could a tiny Chinese magnetic sensor be up to the huge task of tracking submarines?
- Researchers in China have shrunk their technology to the size of a computer chip but much more work needs to be done to get it into the field
Chinese researchers have developed a sensor that might be able to track submarines. Photo: Handout
Chinese researchers have developed a compact sensor that can detect extremely weak magnetic fields and one day might be used to track submarines or act as a backup navigation system.
The sensor, an atomic magnetometer developed by Professor Gu Sihong and his colleagues at the Wuhan Institute of Physics and Mathematics, can fit into a capsule the size of a bean and operate at room temperature, according to research published in the journal Physical Review Applied.
“Using microelectromechanical system technology, the sensor can be fabricated on the chip scale,” Gu wrote.
The device can pick up signals as weak as 20 femtotesla, or about one-fifth the strength of the magnetic field generated by a human brain. Although other devices known as magnetic anomaly detectors are much more sensitive, they are bulkier and can only be mounted on planes or helicopters.
Magnetic anomaly detectors used in anti-submarine warfare must operate at temperatures near absolute zero and require lasers, power supplies and gas chambers to achieve high sensitivity. The US military is reportedly working on technology that can fit on a drone and be used in anti-submarine warfare…….more here
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