Webinar 4: Harald Pötter (Fraunhofer IZM) "Robust wireless sensing"
Using a practical example, the webinar will introduce you to the essential functional components of a wireless sensor system including the required software. This example, the monitoring of high-voltage power lines, explains how the requirements resulting from the application can be converted into a specification for designing self-contained sensors. Which requirements are important for self-sufficient operation and which parameters have to be specified?
The block system design describes the processes starting from the specification of the radio sensor up to the prototype. Various classes of self-sufficient sensor systems are presented and presented for these essential functional groups (control unit, radio interface, power supply, data handling) of self-sufficient radio sensors. The component characteristics essential for the sensor systems are named and explained on the basis of components available on the market.
The design of the firmware plays a central role in self-sufficient sensor technology. Due to the autonomous operation limited power resources and the demand for a low-energy operation on the one hand and the desire for high quality measurement and real-time on the other hand there are conflicting requirements that need to be merged by means of firmware. The webinar presents concepts for driver software of common microprocessors and explains the necessary interfaces for the integration of sensor-specific software.
The limiting factor in wireless sensor technology is often the power supply. Extensively discussed examples first deal with energy management. Advantages and disadvantages as well as the characteristics of energy storage are presented. Finally, possibilities of using energy from the environment (energy harvesting) are presented and discussed.
In addition to the power supply, the wireless interface decisively determines the functionality of a self-sufficient sensor system. In a first step, it will be presented on the basis of which considerations the design of the transmission link has to be made. The idea of established wireless sensor networks and evolving visions complete the considerations. The webinar will then pay particular attention to the selection and placement of antennas as well as the possibility of using low-power protocols to minimize the energy required for communication. At the end of the webinar, data handling and sharing will be briefly discussed.
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