Hendrik_2000
Lieutenant General
Tianjin University Petrel II video
PLAN ASW Capability
- Thread starter shen
- Start date
Hendrik_2000
Lieutenant General
PLA Navy's new 5000 ton class acoustic measurement ship
AKA Sino Surtass getting close to completion .Yup I see crane like structure in the back(Aft section). With network glider and this ship. KQ 200 the Chinese ASW suddenly get a boost
PLA海軍の新型5000トン級音響測定艦
AKA Sino Surtass getting close to completion .Yup I see crane like structure in the back(Aft section). With network glider and this ship. KQ 200 the Chinese ASW suddenly get a boost
PLA海軍の新型5000トン級音響測定艦
Last edited:
Hendrik_2000
Lieutenant General
The cloak of submarine invisibility is slowly being revealed
China claim to improve on MAD using array of SQUID element
or magnetometer based on a superconducting quantum interference device, or SQUID. Superconducting magnetometers are exquisitely sensitive
China’s quantum submarine detector could seal South China Sea
Tailed by a SQUID
By David Hambling
On 21 June, the – a major upgrade to a kind of quantum device that measures magnetic fields. The announcement vanished after a journalist pointed out the invention’s : it could help China lock down the South China Sea.
“I was surprised by the removal,” says Stephen Chen of the South China Morning Post, who raised the issue. “I have been covering Chinese science for many years, and it is rare.”
Magnetometers have been used to detect submarines since the second world war. They are able to do this because they can measure an anomaly in Earth’s magnetic field – like one caused by a massive hunk of metal.
But today’s devices can only detect a submarine at fairly short range, so tend to be used to home in on the location once the sub has already been spotted on sonar.
Superconducting fix
You could widen their range if you had a magnetometer based on a superconducting quantum interference device, or SQUID. Superconducting magnetometers are exquisitely sensitive, but their promise has been limited to the lab. Out in the real world, they are quickly overwhelmed by background noise as minuscule as changes in Earth’s magnetic field caused by distant solar storms.
Given that level of sensitivity, you can forget about mounting such a sensor on an airplane, for example. The US Navy gave up work on superconducting magnetometers to pursue less sensitive but more mature technologies.
The new magnetometer, built by Xiaoming Xie and colleagues at the , uses not one SQUID but an array of them. The idea is that by comparing their readings, researchers can cancel out some of the extra artefacts generated by motion. This “would be relevant to an anti-submarine warfare device”, says , who works on magnetic sensors.
Although the announcement concerning Xie’s work has been removed, several of the culminating in this breakthrough .
The achievement points to an airborne device that can detect submarines from several kilometres away rather than just a few hundred metres. This would be catastrophic for NATO submarines, which have been honed to run ever more quietly, using clever technology that prevents them from being heard or detected on sonar. Their magnetic signature is much harder to eliminate.
Noise problem
Could China soon have the most sensitive submarine detector in the world? No Western navies are known to have SQUID detectors.
Researchers estimate that a SQUID magnetometer of this type could detect a sub from 6 kilometres away, and Caplin says that with better noise suppression the range could be much greater.
Not everyone is convinced the Chinese magnetometer is ready for deployment. Cathy Foley at CSIRO, the Australian government research agency, says there are several difficulties with turning a SQUID into a sub-hunter – for example dealing with background magnetic noise. Nobody has yet solved all of these problems, although she says the rate of Chinese progress means they may well be first to succeed.
SQUIDs are only one of the ways that China has been upgrading its over the last few years. The , a string of submerged sensors, buoys and drone submarines, is thought to be close to completion. The project will help China extend its offshore surveillance zone.
Beijing has long wanted to change the rules of engagement in its waters. Earlier this year it requiring any foreign submarine to get approval before entering Chinese waters, and once there, to stay surfaced and display its national flag. “Can the Chinese make these systems work reliably while in motion in the air or underwater? We’ll be watching their progress closely,” says Foley.
China claim to improve on MAD using array of SQUID element
or magnetometer based on a superconducting quantum interference device, or SQUID. Superconducting magnetometers are exquisitely sensitive
China’s quantum submarine detector could seal South China Sea
Tailed by a SQUID
By David Hambling
On 21 June, the – a major upgrade to a kind of quantum device that measures magnetic fields. The announcement vanished after a journalist pointed out the invention’s : it could help China lock down the South China Sea.
“I was surprised by the removal,” says Stephen Chen of the South China Morning Post, who raised the issue. “I have been covering Chinese science for many years, and it is rare.”
Magnetometers have been used to detect submarines since the second world war. They are able to do this because they can measure an anomaly in Earth’s magnetic field – like one caused by a massive hunk of metal.
But today’s devices can only detect a submarine at fairly short range, so tend to be used to home in on the location once the sub has already been spotted on sonar.
Superconducting fix
You could widen their range if you had a magnetometer based on a superconducting quantum interference device, or SQUID. Superconducting magnetometers are exquisitely sensitive, but their promise has been limited to the lab. Out in the real world, they are quickly overwhelmed by background noise as minuscule as changes in Earth’s magnetic field caused by distant solar storms.
Given that level of sensitivity, you can forget about mounting such a sensor on an airplane, for example. The US Navy gave up work on superconducting magnetometers to pursue less sensitive but more mature technologies.
The new magnetometer, built by Xiaoming Xie and colleagues at the , uses not one SQUID but an array of them. The idea is that by comparing their readings, researchers can cancel out some of the extra artefacts generated by motion. This “would be relevant to an anti-submarine warfare device”, says , who works on magnetic sensors.
Although the announcement concerning Xie’s work has been removed, several of the culminating in this breakthrough .
The achievement points to an airborne device that can detect submarines from several kilometres away rather than just a few hundred metres. This would be catastrophic for NATO submarines, which have been honed to run ever more quietly, using clever technology that prevents them from being heard or detected on sonar. Their magnetic signature is much harder to eliminate.
Noise problem
Could China soon have the most sensitive submarine detector in the world? No Western navies are known to have SQUID detectors.
Researchers estimate that a SQUID magnetometer of this type could detect a sub from 6 kilometres away, and Caplin says that with better noise suppression the range could be much greater.
Not everyone is convinced the Chinese magnetometer is ready for deployment. Cathy Foley at CSIRO, the Australian government research agency, says there are several difficulties with turning a SQUID into a sub-hunter – for example dealing with background magnetic noise. Nobody has yet solved all of these problems, although she says the rate of Chinese progress means they may well be first to succeed.
SQUIDs are only one of the ways that China has been upgrading its over the last few years. The , a string of submerged sensors, buoys and drone submarines, is thought to be close to completion. The project will help China extend its offshore surveillance zone.
Beijing has long wanted to change the rules of engagement in its waters. Earlier this year it requiring any foreign submarine to get approval before entering Chinese waters, and once there, to stay surfaced and display its national flag. “Can the Chinese make these systems work reliably while in motion in the air or underwater? We’ll be watching their progress closely,” says Foley.
Last edited:
Hendrik_2000
Lieutenant General
Via Samsara from Pakdef Some more revelation about SQUID. I guess it won't be long that they have to store the jolly rogers(pirate flag as sign of successful mission) in storage
The new magnetometer developed by the Chinese Academy of Sciences can capture the weakest magnetic field in a few kilometers away. The basis of this instrument is the Superconducting Quantum Interferometer (SQUID), which utilizes the principles of quantum mechanics. The SQUID can record changes in the electronic interference situation under the influence of an external magnetic field, which has a discontinuous stepped characteristic.
China's new SOSUS system- Schematic diagram 中国新打造的SOSUS系统原理图
In the Chinese Navy's SOSUS or sound surveillance system, this new technology is currently China's leading technology in the world, called superconducting quantum interferometer (SQUID). SQUID utilizes the principles of quantum mechanics and a new set of Chinese scientists to develop a new algorithm that captures the weakest disturbance of objects on the Earth's magnetic field in a few kilometers, and its acquired signals are transmitted through the submarine fiber to the ultra-high-speed information processing center, so that experienced anti-submarine experts locked the enemy underwater attack platform accurate location. Once China has applied this technology to the underwater detection network, then all the submarine noise reduction efforts in the United States, Japan and NATO are lost. Because even if the American advanced "Sea Wolf" class nuclear submarines shut down the engines and all equipment for their own safety, do not make any sound, but will still be found by the SQUID based ultra-sensitive magnetometer network.
China's new SOSUS system - Model 中国海军SOSUS系统的模型
中国研制出超灵敏磁力传感器技术 能捕获一切潜艇 [2017-08-29]
See also:
An Ultra-Sensitive Magnetic Field Sensor Based on Extrinsic Fiber-Optic Fabry–Perot Interferometer and Terfenol-D
Abstract:
We report a fiber-optic magnetic field sensor with ultra-high sensitivity based on a precisely configured extrinsic fiber-optic Fabry-Perot interferometer (EFFPI) and Terfenol-D slab. The EFFPI was simply formed by placing two well-cleaved single-mode fibers with carefully designed spacing and it was bonded to the surface of a Terfenol-D slab by epoxy resin. The experiments demonstrate good linear relationship between the applied magnetic field strength and the wavelength shift up to 560 Oe and the measurement range is only limited by the available bandwidth of the light source. The maximal sensitivity of the magnetic field measured by the proposed sensor is 854.73 pm/Oe through monitoring the shift of wavelength dip of the spectrum reflected from the EFFPI, which is significantly larger than most of the reported results. We also evaluated the repeatability of the proposed sensor and the performance of the proposed sensor working at a direct-current (dc)-biased magnetic field. Results indicated that the proposed fiber-optic magnetic field sensor exhibits good restorable measurement performance up to 140 Oe and a preapplied dc magnetic field can be used to extend the linear measurement dynamic range.
Published in: Journal of Lightwave Technology ( Volume: 33, Issue: 15, Aug.1, 1 2015 )
I. Introduction
The magnetic field sensor can be widely used in the information storage, navigation, aerospace, military, and biomedical detection [1], etc. In the past few years, magneto-optical sensors have attracted great attention due to their unique advantages, such as small size, compact design, low cost, and immunity to electromagnetic interference as compared with their conventional competitors [2]. In principle, the fiber-optic system can detect magnetic field directly by measure the Faraday rotation of the light polarization [3]. Since no external transducer is required, this mechanism is ideal as an intrinsic sensor. However, its sensitivity is low due to the small Verdet constant of silica fibers. In order to employ fiber-optics to sense magnetic field and overcome the drawback of small magnetic sensitivity, the concept of fiber-optic strain sensor in conjunction with magnetostrictive material to detect tiny magnetic fields was first proposed in 1980 [4] and then achieved in 1983 [5]. In this kind of fiber-optic magnetic sensor, the magnetostrictive material functions as a magnetic actuator with magnetostrictive strain as the output, while the fiber-optic strain sensor operates as a strain sensor with the magnetostrictive strain from the magnetostrictive materials as the input [6].
The new magnetometer developed by the Chinese Academy of Sciences can capture the weakest magnetic field in a few kilometers away. The basis of this instrument is the Superconducting Quantum Interferometer (SQUID), which utilizes the principles of quantum mechanics. The SQUID can record changes in the electronic interference situation under the influence of an external magnetic field, which has a discontinuous stepped characteristic.
China's new SOSUS system- Schematic diagram 中国新打造的SOSUS系统原理图
In the Chinese Navy's SOSUS or sound surveillance system, this new technology is currently China's leading technology in the world, called superconducting quantum interferometer (SQUID). SQUID utilizes the principles of quantum mechanics and a new set of Chinese scientists to develop a new algorithm that captures the weakest disturbance of objects on the Earth's magnetic field in a few kilometers, and its acquired signals are transmitted through the submarine fiber to the ultra-high-speed information processing center, so that experienced anti-submarine experts locked the enemy underwater attack platform accurate location. Once China has applied this technology to the underwater detection network, then all the submarine noise reduction efforts in the United States, Japan and NATO are lost. Because even if the American advanced "Sea Wolf" class nuclear submarines shut down the engines and all equipment for their own safety, do not make any sound, but will still be found by the SQUID based ultra-sensitive magnetometer network.
China's new SOSUS system - Model 中国海军SOSUS系统的模型
中国研制出超灵敏磁力传感器技术 能捕获一切潜艇 [2017-08-29]
See also:
An Ultra-Sensitive Magnetic Field Sensor Based on Extrinsic Fiber-Optic Fabry–Perot Interferometer and Terfenol-D
Abstract:
We report a fiber-optic magnetic field sensor with ultra-high sensitivity based on a precisely configured extrinsic fiber-optic Fabry-Perot interferometer (EFFPI) and Terfenol-D slab. The EFFPI was simply formed by placing two well-cleaved single-mode fibers with carefully designed spacing and it was bonded to the surface of a Terfenol-D slab by epoxy resin. The experiments demonstrate good linear relationship between the applied magnetic field strength and the wavelength shift up to 560 Oe and the measurement range is only limited by the available bandwidth of the light source. The maximal sensitivity of the magnetic field measured by the proposed sensor is 854.73 pm/Oe through monitoring the shift of wavelength dip of the spectrum reflected from the EFFPI, which is significantly larger than most of the reported results. We also evaluated the repeatability of the proposed sensor and the performance of the proposed sensor working at a direct-current (dc)-biased magnetic field. Results indicated that the proposed fiber-optic magnetic field sensor exhibits good restorable measurement performance up to 140 Oe and a preapplied dc magnetic field can be used to extend the linear measurement dynamic range.
Published in: Journal of Lightwave Technology ( Volume: 33, Issue: 15, Aug.1, 1 2015 )
I. Introduction
The magnetic field sensor can be widely used in the information storage, navigation, aerospace, military, and biomedical detection [1], etc. In the past few years, magneto-optical sensors have attracted great attention due to their unique advantages, such as small size, compact design, low cost, and immunity to electromagnetic interference as compared with their conventional competitors [2]. In principle, the fiber-optic system can detect magnetic field directly by measure the Faraday rotation of the light polarization [3]. Since no external transducer is required, this mechanism is ideal as an intrinsic sensor. However, its sensitivity is low due to the small Verdet constant of silica fibers. In order to employ fiber-optics to sense magnetic field and overcome the drawback of small magnetic sensitivity, the concept of fiber-optic strain sensor in conjunction with magnetostrictive material to detect tiny magnetic fields was first proposed in 1980 [4] and then achieved in 1983 [5]. In this kind of fiber-optic magnetic sensor, the magnetostrictive material functions as a magnetic actuator with magnetostrictive strain as the output, while the fiber-optic strain sensor operates as a strain sensor with the magnetostrictive strain from the magnetostrictive materials as the input [6].
Via Samsara from Pakdef Some more revelation about SQUID. I guess it won't be long that they have to store the jolly rogers(pirate flag as sign of successful mission) in storage
The new magnetometer developed by the Chinese Academy of Sciences can capture the weakest magnetic field in a few kilometers away. The basis of this instrument is the Superconducting Quantum Interferometer (SQUID), which utilizes the principles of quantum mechanics. The SQUID can record changes in the electronic interference situation under the influence of an external magnetic field, which has a discontinuous stepped characteristic.
Not the 1st time i reported you for flame blait talking about war etc... damage some post interestings but really so excited ! you degraded the forum ... Indians, USA, France etc... except China you do not like any country it is obvious !
Jura The idiot
General
I've now made one more attempt
Hendrik_2000
Lieutenant General
The building block of undersea great wall is maturing. It won't be long that it will be finish
- A new type of automatic buoy, which regulates the military acoustic listening network (?), Completed the first 2-year test phase.
0 replies0 retweets1 like
New autonomous glider for maritime surveillance is tested successfully.
-
What exactly is your problem here?
antiterror13
Brigadier
Respectfully in my opinion (not stating as facts), I think his point is that he dislikes certain members' views so he reports them for trolling even when their posts are not flame baits to begin with.
He took tissue with the following post
In the context of Hendrik's post, SQUID when successfully developed/implemented has the capability to make it harder for US, NATO subs to complete surveillance missions near Chinese water. Hence harder for US subs' crews to hoist Jolly Roger flags, mark of success.
From my understanding, sub surveillance missions are conducted routinely by every navies during peace time. This has nothing to do with war or talking about war between China and US.