Design considerations and simulations are presented for an identification tag to be used in tracking insects through the use of harmonic radar. Radar is used instead of a radio transmitter in order to minimize the loading of the insect which for the Colorado potato beetle under study will require a tag of less than 5 mg mass. Frequency selection, antenna radiation pattern and impedance, as well as the SPICE model are discussed. The tag consists of a thin wire dipole antenna with a low-barrier Schottky diode and tuning inductor located at the feed point. The tag design procedure with limitations is presented.
Th~s paper explores the concept of machine intelligence required for the smart sensor environment. The increasing complexity of the hardware requirements for smart sensor applications has led to the inclusion of field programmable gate arrays, P G A , in the design of these systems.Two main advantages can be capitalized on with this approach, based on the characteristics of the FPGA's. Firstly, the design can be easily modified , reducing the design cycle time considerably. Also, as FPGA's are inherently parallel devices, both local processing and system partitioning are provided.The total system design in this project includes an application speclfic integrated circuit, ASIC, the FPGA, and a microcomputer. In this fashion the requirements for a smart sensor are realised.
Zusammenfassung: Durch das Gießen eines leitfähigen Gelatine-Lyogels im Micro-Scale-Aufbau kann eine kostengünstige Zelle für elektrochemische Schulversuche hergestellt werden, die mit wenigen Millilitern Elektrolyt betrieben werden kann, Lernenden einen einfachen visuellen Zugang zur Phänomenebene der Halbzellreaktionen bietet, keine Bruchgefahr im Schüler*innen-Experiment darstellt und zudem deutlich leistungsfähiger ist als ein vergleichbarer Aufbau im klassischen U-Rohr.
Zusammenfassung: Durch die Bemühungen zur Mobilitätswende gewinnen Energiespeicher mit hoher Energiedichte zunehmend an Bedeutung. In diesem Kontext zählen Lithium-Schwefel-Batterien zu den vielversprechendsten Energiespeichern der Zukunft. Vor der kommerziellen Nutzung dieses spannenden Energiespeichers sind jedoch noch zahlreiche Probleme zu lçsen. Einige dieser Umsetzungsschwierigkeiten lassen sich in Modellversuchen ebenso veranschaulichen, wie die Funktionsweise der Lithium-Schwefel-Batterie.
A harmonic radar system is described for use in tracking the movement of flying insects in entomological studies. The objective is to predict the range performance of the system given realistic antenna dimensions, transmit power and receiver performance. A description of the receiver is presented including the noise and signal level calculations. A maximum range of 251 m is shown to be realizable under realistic assumptions.
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