The great surface of the Argentine Marine Platform (6,581,500 km ² ) and the relative low effort in collecting and studying new species due to economical restrictions could explain the low fraction of described species. However, no model fit to our data, showing that the recorded species represent less than 50% of the expected marine invertebrate biodiversity for the Argentine Sea. Cumulative species curves were analyzed in order to estimate the percentage of marine invertebrate biodiversity that is currently known. The best represented taxa were Arthropoda and Mollusca, contributing approximately with the 50% of the mentioned species in the literature. A list of 3,064 valid species, grouped into 1,662 genera distributed in 808 families and 23 phyla, was assessed.
Part of this dataset was uploaded to the OBIS database, as a product of the Census of Marine Life-NaGISA project. Thus, almost 3,100 valid species are currently recognized as living in the Argentine Sea. After an exhaustive literature review, the available information of two centuries of scientific contributions is summarized.
In particular, the living invertebrate organisms, reported in the literature for the Argentine Sea, were checked and summarized covering more than 8,000 km of coastline and marine platform. The list of marine invertebrate biodiversity living in the southern tip of South America is compiled. As result, the communication range was extended to the required value, guaranteeing the link between the reader and the tag throughout the entire revolution cycle of the crankshaft. To compensate these effects and extend the communication range, a tuning procedure of the reader circuit was carried out and the power emitted by the reader had to be increased. Therefore, an experimental evaluation was performed, to measure the effects of the coil interaction with the environment inside the machine. However, the interaction of the RFID interface with the metallic parts inside the machine deteriorates performance, causing a strong reduction in the expected communication range. To minimize operating condition changes at the reader circuit, the geometric variables of the coil were recalculated while keeping its electrical parameters constant. To address this problem, a redesign of the reader coil is proposed in this work. However, as the tag moves away from the reader, during the crankshaft revolution cycle, their communication is interrupted. The tag moves with the connecting rod, while performing the measurements and reporting them to the reader. The tag is integrated with a microcontroller and a signal conditioner, which is connected to thermocouples that sense the temperature of the bearings.
Taking advantage of that, a prototype for temperature monitoring in connecting rod bearings RFID tag was developed based on a commercial device.
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Because RFID tags can be used as a communication interface for data transmission, but also as energy harvesters, it becomes attractive for wireless and battery free applications. Current wireless power transmission techniques, in combination with the large integration in silicon devices and ultra-low power integrated circuits have enabled the use of RFID tags as sensors.
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