Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Sensor cable monitors fences of all kinds and can even detect low-level drone fly-bys

25.03.2015

Fenced-in areas, such as airports, nuclear power stations, industrial sites, or private plots of land, can now be monitored thanks to novel sensor technology that has been developed by a team of experimental physicists, led by Professor Uwe Hartmann at Saarland University. The sensors respond immediately as soon as someone tries to climb over or cut through the fence, providing information on the precise location of the security breach. They are even able to detect a low-flying drone passing overhead. The thin cable containing the magnetic field sensors can be easily installed on perimeter fences of all kinds.

The research team is currently working on developing the system so that it can recognize the cause of a disturbance and can automatically identify false alarms triggered by wind or animals. The team is collaborating with industrial partners to produce a cable suitable for mass production. The technology will be shown at HANNOVER MESSE from April 13th to April 17th. The team will be exhibiting at the Saarland Research and Innovation Stand in Hall 2, Stand B 46.


A number of fences on the Saarbrücken campus are presently undergoing long-term monitoring. From left: Professor Uwe Hartmann and the scientists Dr. Uwe Schmitt and Dr. Haibin Gao.

Foto: Oliver Dietze

If someone tries to tamper with a fence, or if they try to climb over it or cut the links with bolt cutters, they will, unavoidably, cause a vibrational disturbance. The movement of the metal fence as it swings back and forth, the motion of the metal cutters or even the trespasser’s belt will all influence the Earth’s magnetic field. These changes are being exploited by a team of experimental physicists at Saarland University for a new type of surveillance technology.

‘Our magnetometers (magnetic field sensors) are highly sensitive and can reliably measure even the smallest of changes in the ambient magnetic field,’ explains Professor Uwe Hartmann. The sensors are even able to detect when a drone flies close by overhead – provided, of course, that the drone contains metal. ‘The sensors can detect disturbances in the surrounding magnetic field, including the magnetic field above them, with a range extending several metres,’ adds research assistant Haibin Gao who is working on the sensor technology as part of Hartmann’s team.

The cable, which contains the linearly arranged sensors, has a diameter comparable to a standard electrical cable and enables the remote monitoring of miles of perimeter fencing. ‘The cable can be attached to the fence, built into it or even buried beneath it. We are currently working with a number of companies to reduce the size of the system and, most importantly, to lower the cost of producing the sensors to a level where large-volume production becomes feasible,’ says Uwe Hartmann.

The contactless sensors are not subject to wear and have a low power consumption. They are unaffected by rain or fog. ‘The sensors function independently of the weather and this gives them a significant advantage over other surveillance techniques, such as cameras, where moisture is often a problem. And the measurements are unproblematic from the point of view of privacy. The sensors simply report that a vibrational disturbance was caused by a human agent at a specific location. No other information is gathered,’ explains Professor Hartmann. A number of different types of sensor systems developed by his research group have already been deployed in traffic management systems, for example in airports.

The miniature sensors in the cable are networked and any change that they register is immediately transmitted to the analyser unit. The location of the disturbance can be specified with high precision, which is of particular value when monitoring very large areas. Scientists in Hartmann’s team are currently working on refining the technology so that the sensors are able to unambiguously assign a particular type of vibration or a particular change in the measured magnetic field to a specific type of disturbance.

‘The aim is to develop a system that can automatically identify false alarms triggered by wind, animals or some other harmless cause,’ explains Hartmann. To do this the researchers are currently simulating different types of disturbances. A number of fences on the Saarbrücken campus are presently undergoing long-term monitoring to determine how the system is affected by such factors as wind. This field data is used by the physicists to model typical disturbance scenarios and to train the system with the aid of complex mathematical methods.

The results are then used to program the sensors and the analyser unit. The new information enables the analyser to automatically attribute a disturbance to a particular cause. If the cause is identified as human, an alarm is triggered; if the disturbance was due to animal rubbing up against the fence, no alarm is set off.

The Federal Ministry of Education and Research (BMBF) has provided a total of more than one million Euro in research funding, of which more than € 250,000 was allocated to Saarland University. Industrial project partners are Sensitec GmbH, based in Mainz and Lahnau (http://www.sensitec.com) and GBA-Panek GmbH whose headquarters are in Kahla, south of Jena (http://www.gba-panek.de).

Contact:
Prof. Dr. Uwe Hartmann, Nanostructure Research and Nanotechnology Group, Department of Experimental Physics, Saarland University, Germany,
Tel.: +49 (0)681 302-3799 or -3798; E-mail: u.hartmann@mx.uni-saarland.de
Dr. Haibin Gao: +49 (0)681 302-3654; h.gao@mx.uni-saarland.de
Dr. Uwe Schmitt: +49 (0)681 302-2957; uwe.schmitt@mx.uni-saarland.de

During HANNOVER MESSE 2015, the Saarland Research and Innovation Stand can be contacted at Tel.: +49 (0)681 302-68500.

Note for radio journalists: Studio-quality telephone interviews can be conducted using broadcast audio IP codec technology (IP direct dial or via the ARD node 106813020001). Interview requests should be addressed to the university’s Press and Public Relations Office (+49 (0)681 302-64091 or -2601).

Background:
The Saarland Research and Innovation Stand is organized by Saarland University's Contact Centre for Technology Transfer (KWT). KWT is the central point of contact for companies interested in exploring opportunities for cooperation and collaboration with researchers at Saarland University. http://www.uni-saarland.de/kwt

Claudia Ehrlich | Universität des Saarlandes

Further reports about: Sensor disturbance drone false alarms magnetic field vibrational disturbance

More articles from Information Technology:

nachricht Drones shown to make traffic crash site assessments safer, faster and more accurate
17.01.2019 | Purdue University

nachricht Next generation photonic memory devices are light-written, ultrafast and energy efficient
15.01.2019 | Eindhoven University of Technology

All articles from Information Technology >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Ten-year anniversary of the Neumayer Station III

The scientific and political community alike stress the importance of German Antarctic research

Joint Press Release from the BMBF and AWI

The Antarctic is a frigid continent south of the Antarctic Circle, where researchers are the only inhabitants. Despite the hostile conditions, here the Alfred...

Im Focus: Ultra ultrasound to transform new tech

World first experiments on sensor that may revolutionise everything from medical devices to unmanned vehicles

The new sensor - capable of detecting vibrations of living cells - may revolutionise everything from medical devices to unmanned vehicles.

Im Focus: Flying Optical Cats for Quantum Communication

Dead and alive at the same time? Researchers at the Max Planck Institute of Quantum Optics have implemented Erwin Schrödinger’s paradoxical gedanken experiment employing an entangled atom-light state.

In 1935 Erwin Schrödinger formulated a thought experiment designed to capture the paradoxical nature of quantum physics. The crucial element of this gedanken...

Im Focus: Nanocellulose for novel implants: Ears from the 3D-printer

Cellulose obtained from wood has amazing material properties. Empa researchers are now equipping the biodegradable material with additional functionalities to produce implants for cartilage diseases using 3D printing.

It all starts with an ear. Empa researcher Michael Hausmann removes the object shaped like a human ear from the 3D printer and explains:

Im Focus: Elucidating the Atomic Mechanism of Superlubricity

The phenomenon of so-called superlubricity is known, but so far the explanation at the atomic level has been missing: for example, how does extremely low friction occur in bearings? Researchers from the Fraunhofer Institutes IWM and IWS jointly deciphered a universal mechanism of superlubricity for certain diamond-like carbon layers in combination with organic lubricants. Based on this knowledge, it is now possible to formulate design rules for supra lubricating layer-lubricant combinations. The results are presented in an article in Nature Communications, volume 10.

One of the most important prerequisites for sustainable and environmentally friendly mobility is minimizing friction. Research and industry have been dedicated...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Our digital society in 2040

16.01.2019 | Event News

11th International Symposium: “Advanced Battery Power – Kraftwerk Batterie” Aachen, 3-4 April 2019

14.01.2019 | Event News

ICTM Conference 2019: Digitization emerges as an engineering trend for turbomachinery construction

12.12.2018 | Event News

 
Latest News

Additive manufacturing reflects fundamental metallurgical principles to create materials

18.01.2019 | Materials Sciences

How molecules teeter in a laser field

18.01.2019 | Life Sciences

The cytoskeleton of neurons has been found to be involved in Alzheimer's disease

18.01.2019 | Health and Medicine

VideoLinks
Science & Research
Overview of more VideoLinks >>>