autonomous sensors
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2020 ◽  
Vol 139 ◽  
pp. 106642
Author(s):  
Ulrike Nabholz ◽  
Lukas Lamprecht ◽  
Jan E. Mehner ◽  
André Zimmermann ◽  
Peter Degenfeld-Schonburg

Author(s):  
Nikolay P. Zapivalov ◽  

An oil deposit is a «living» fluid–rock system capable of self–regulation. Rehabilitation cycles and soft, sparing methods of improving oil recovery are the basis of a long life of an oilfield. This fluid–rock system (oil deposit) must be studied in detail with the use of special smart autonomous sensors located directly inside the productive stratum (focus). Many researchers note upstream and midstream uncertainties and risks.


Author(s):  
Hugo García-Vázquez ◽  
Alexandre Quenon ◽  
Grigory Popov ◽  
Fortunato Carlos Dualibe

2020 ◽  
Vol 8 (30) ◽  
pp. 15023-15033 ◽  
Author(s):  
Bushara Fatma ◽  
Shashikant Gupta ◽  
Chandrachur Chatterjee ◽  
Ritamay Bhunia ◽  
Vivek Verma ◽  
...  

An environment-friendly approach towards the preparation of triboelectric generators used as self-powered sensors for wireless security systems.


Sensors ◽  
2019 ◽  
Vol 19 (20) ◽  
pp. 4392 ◽  
Author(s):  
Mariusz Węglarski ◽  
Piotr Jankowski-Mihułowicz

A general view on the problem of designing atypical battery-free, autonomous semi-passive RFID transponders-sensors (autonomous sensors with RFID interfaces) is presented in this review. Although RFID devices can be created in any of the electronic technologies, the design stage must be repeated each time when the manufacturing processes are changed, and their specific conditions have to be taken into consideration when modeling new solutions. Aspects related to the factors affecting the synthesis of semi-passive RFID transponder components on the basis of which the idea of the autonomous RFID sensor was developed are reflected in the paper. Besides their general characteristics, the operation conditions of modern RFID systems and achievements in autonomous RFID sensor technology are revealed in subsequent sections—they include such issues as technological aspects of the synthesis process, designing antennas for RFID transponders, determining RFID chip and antenna parameters, creating the interrogation zone IZ, etc. It should be pointed that the universal construction of an autonomous RFID sensor, which could be use in any application of the automatic object identification system, cannot be developed according to the current state of the art. Moreover, a trial and error method is the most commonly used in the today’s process of designing new solutions, and the basic parameters are estimated on the basis of the tests and the research team experience. Therefore, it is necessary to look for new inventions and methods in order to improve implementations of RFID systems.


Sensors ◽  
2019 ◽  
Vol 19 (3) ◽  
pp. 728 ◽  
Author(s):  
Sangkil Kim ◽  
Manos Tentzeris ◽  
Apostolos Georgiadis

In this paper, the far-field energy harvesting system for self-sustainable wireless autonomous sensor application is presented. The proposed autonomous sensor system consists of a wireless power supplier (active antenna) and far-field energy harvesting technology-enabled autonomous battery-less sensors. The wireless power supplier converts solar power to electromagnetic power in order to transfer power to multiple autonomous sensors wirelessly. The autonomous sensors have far-field energy harvesters which convert transmitted RF power to voltage regulated DC power to power-on the sensor system. The hybrid printing technology was chosen to build the autonomous sensors and the wireless power suppliers. Two popular hybrid electronics technologies (direct nano-particle printing and indirect copper thin film printing techniques) are discussed in detail.


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