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Vol. 82, Issue 8, August 2007, pp. 1389-1404




Sensor Interfaces for Private Home Automation: From Analog to Digital, Wireless and Autonomous


Erich Leder, Alexander Sutor, Martin Meiler, Reinhard Lerch, Benedikt Pulvermueller, Michael Guenther

University of Erlangen-Nuremberg, Department of Sensor Technology,
Germany, Paul-Gordan-Street 3-5, 91052 Erlangen,

Tel.: 09131 8523131, fax: 09131 8523133

E-mail: sutor@lse.eei.uni-erlangen.de, www.lse.uni-erlangen.de



Received: 23 July 2007   /Accepted: 20 August 2007   /Published: 27 August 2007


Abstract: In this paper a flexible and reliable system for smart home automation is presented. It is based on standardized hardware and open source communication protocols.


Firstly, a special sensor interface has been developed, which allows the measurement of (slow) analog signals to be determined by inexpensive digital PLC input terminals. Right now, up to eleven different modules have been implemented and the system is being tested in several configurations.


In a second step, the communication is digitized. With the digitalization of the sensor modules, based on the implementation of a PIC Microcontroller, more intelligence is provided to the module, which increases the power and flexibility of the whole system. Thirdly, a wireless sensor-system consisting of a base station and of a mobile measuring unit is developed. The autonomous mobile unit is realized by using solar powering, gold cap energy storage, low-power circuits and a radio communication interface.


Keywords: PLC, Sensor interface, Frequency coded signal, Wireless sensor, Autonomous sensor


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