Navigation Links
Wireless window sentinel
Date:9/5/2012

A bad weather front is fast approaching and a cloudburst is imminent. If you happen to be away from home, but have left a window open, either deliberately or because you forgot to check one room, you may be in for a wet surprise when you come home. However, it does not have to be like that: Thanks to a new sensor system, such situations can now be avoided. A sensor embedded in the window frame detects if a window is closed, cracked open or wide open and sends this information to a base station at the main door. When leaving the house, a resident can tell at a glance which windows are open and which closed. Since the system enables remote queries, users can even monitor windows via a smartphone. Researchers at the Fraunhofer Institute for Integrated Circuits IIS, based in Erlangen and Nuremberg, have developed the product in close collaboration with Seuffer, a Calw-based company which has been an IIS industry partner for over a decade.

The intelligent window monitor is based on the IIS-developed HallinOne sensor a 3-D magnetic field sensor that is already being used in mass-produced washing machines, where it determines the exact position of the drum. "We've adapted our technology for the window application. A fingernail-sized sensor embedded in the inner frame detects sash and handle positions by measuring any changes in the angle and position of a magnet that's embedded in the bottom of the sash. When you lock the window, for example, the magnet moves to the right," explains IIS engineer Klaus-Dieter Taschka. "The sensor even detects if a casement window appears to be properly latched, but has actually just been pulled shut. No other system can do this." In addition, the system is tamper-proof and so can help protect against break-ins. The magnet cannot be removed without the sensor detecting its removal.

Wireless communication

Also embedded in the frame is an RF node. Comprising a radio unit and a microcontroller, it uses the s-net technology developed by IIS for extremely energy-efficient wireless data transmission to a base station. This can take the form of a PC, cell phone or tablet, even a room controller. "The s-net wireless sensor network is a multi-hop network where sensor nodes exchange data both with each other and with master nodes," says Taschka. Nodes have a communication range of 20 to 30 meters, which defines the maximum distance between one window and the next. Multi-hop capability means the system can cover vast areas, making it suitable for use in businesses. Installed in an office building, it could provide front-desk security staff with window status information and so do away with the need for walk-through checks. Another feature of the window sentinel is that it requires no cables or batteries. The sensor draws all the power it needs from its surroundings. The underlying technology, known among experts as "energy harvesting", enables power to be derived from ubiquitous sources such as air currents, vibrations or in this case sunlight and ambient heat.

Thermoelectric generators embedded in the window frame transform heat into power. Solar cells attached to the outer window frame also help power the 3-D sensor. "Our tests showed that this works even in north-facing windows," says Andreas Buchholz, Head of Research and Development at Seuffer.

Obviously, the system is suitable for everyday use only if all sensors function reliably. To ensure that this is the case, each chip is equipped with a coil that creates a magnetic field as soon as power is applied. If a signal is emitted, then the sensor is intact. "The window monitor is the result of a vigorous exchange of ideas we've maintained over the years with Fraunhofer researchers," says Buchholz.

The window, which includes the sensor, magnet, RF node and solar cell, is currently available as a prototype. By the end of the year it is expected to be ready for mass production. Manufacturing will be done by Seuffer, which also developed the electronics and produced the housing.


'/>"/>

Contact: Dipl.-Ing. Klaus-Dieter Taschka
klaus.taschka@iis.fraunhofer.de
49-913-177-64475
Fraunhofer-Gesellschaft
Source:Eurekalert  

Related biology news :

1. A millimeter-scale, wirelessly powered cardiac device
2. Frog calls inspire a new algorithm for wireless networks
3. Spectros Launches OnCall Wireless Remote Access for T-Stat
4. Preventice Expands Options for Wireless Patient Monitoring with Qualcomm Life
5. Tattoo-like devices for wireless pregnancy monitoring
6. Feel-good glass for windows
7. Salk scientists open new window into how cancers override cellular growth controls
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Wireless window sentinel
(Date:3/3/2016)... 2016  FlexTech, a SEMI Strategic Association Partner, awarded ... & Development, Leadership in Education, and, in a category ... th year of the FLEXI Awards and the ... from past years . Judging was done on ... of criteria, by a panel of non-affiliated, independent, industry ...
(Date:3/2/2016)... DUBLIN , March 2, 2016 /PRNewswire/ ... has announced the addition of the  "Global ... to their offering.  ,     (Logo: http://photos.prnewswire.com/prnh/20130307/600769) , ... sector to grow at a CAGR of ... http://www.researchandmarkets.com/research/wzwqtz/global_biometrics ) has announced the addition ...
(Date:3/1/2016)... , March 1, 2016  (RSAC Booth #3041) – ... a whopping $118 billion is lost to false positives, ... and inaccurate fraud detection. At the RSA Conference 2016, ... way companies handle authentication by devaluing the data fraudsters ... analytics. --> --> ...
Breaking Biology News(10 mins):
(Date:4/28/2016)... Rocky Hill, Conn. (PRWEB) , ... April 28, ... ... source of financing and ongoing support for Connecticut's innovative, growing companies, today announced ... early-stage digital health and financial technology (fintech) companies. , “VentureClash looks ...
(Date:4/27/2016)... (PRWEB) , ... April 27, 2016 , ... ... of cannabis testing technology at the Spring 2016 Marijuana Business Conference and Expo. ... pesticides, residual solvents, heavy metals, and more. Expo attendees can stop by booth ...
(Date:4/27/2016)... (PRWEB) , ... April 27, 2016 , ... ... (d/b/a Biohaven) is pleased to announce the appointment of John Tilton as Chief Commercial ... Executive Director and one of the founding commercial leaders responsible for the commercialization ...
(Date:4/27/2016)... ... April 27, 2016 , ... Global Stem Cells ... of an Asia-Pacific Symposium as other research and development initiatives for potential stem cell ... and top Global Stem Cells Group executives began meeting to establish a working agenda ...
Breaking Biology Technology: