Results unveiled that the high-frequency component of seismic waves were filtered and the low-frequency component were amplified by foundation soil. According to the influential factors and characteristics of soil-metro structure’s seismic responses, the layout principle of sensors was summarized, which defined the location of the observation section and the main observation indexes of shield tunnel structure in shaking table test. The acceleration responses, the displacement responses and the law of dynamic strain of soil-metro shield tunnel system were studied. Igor Titov, Lucas Holtorf und Martina Gerken, „Drone as LoRa® Repeater for Readout of Low-power Sensor Nodes in Precision Agriculture,“ angenommen bei der GMM-Fachtagung Energieautonome Sensorsysteme 2022.The seismic responses of metro shield tunnel in soft soil area were analyzed by using finite-infinite element coupled analysis model.Monolithic Integrated OLED–OPD Unit for Point-of-Need Nitrite Sensing. Böckmann, „Vorrichtung und Verfahren zur Extraktion von Wasser aus einer Bodenprobe “ Priority, DE 10 2021 121 165.4 angemeldet am. Extraction of Soil Solution into a Microfluidic Chip. In experiments at the Experimental Farm Hohenschulen of Kiel University, we have demonstrated that we can connect to a microprocessor with a LoRa® antenna, which is buried in a box in the ground, with a drone at a height of 40 m. This approach enables miniaturized sensor systems in which the optical detection unit is directly integrated with the microfluidics.Ĭompact, wireless sensor systems in the ground can be read out, for example, using the LoRa® communication standard, which enables the transmission of small amounts of data over large distances.
We have already achieved promising detection limits of 50 µg/L for nitrite and 5 mg/L for nitrate in first laboratory tests. We have shown that we can measure the absorbance of the sample and thus the nitrite content with the cent-sized optical detection unit using organic optoelectronics. The image on the left shows the color for water with increasing nitrite content after the chemical reaction as well as the spectral response. The nitrite is colored so that the color of the solution can be used to determine the nitrite content. The nitrite content of a sample may, for example, be determined optically using a colorimetric assay. Precision farming uses sensors, information databases and improved machines for informed agricultural management and optimized production using artificial intelligence. These data values can be used to set up field-specific information databases for "precision farming". With the soil-solution extraction unit, we target automated, regular analysis of soil water. A hydrophilic ceramic is used as a filter with direct contact to the soil. We have developed a soil-solution extraction unit that allows water to be drawn from the soil into a microfluidic. These nutrients must be available in sufficient quantities in the soil, but over-fertilization leads to critical environmental pollution. In agriculture, chemical parameters are in particular plant nutrients such as nitrogen or phosphorus. We are working on sensor systems that enable monitoring of physical and chemical parameters in the soil. Contaminated soils need to be remediated to protect drinking water quality and the ecosystem in general. Efficient use of soil in agriculture is required to feed the growing population.
The soil of the earth is the basis of our life.
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