Spanish researchers develop new device for wireless charging

The researchers designed wireless energy transmissions that can be recharged to cell phones or laptops without the need for new devices using cables. Researchers at the University of Technology (UPV) in Spain have invented a system based on radial photonic crystal resonators; one of them will act as an energy transmitter and other charging device that will need to be set up. . Between them is called the resonant coupling phenomenon, which is the last device to generate charge or recharge.
“This phenomenon produces a resonant object that moves closer to the second resonant element and the two resonant frequencies are the same or very similar,” said Jose Sanchez de Esa, a researcher at the University of Technology in Valencia. "Such physical proximity results from the first device acting as a source to the second, acting as an energy coupling for the charge," said Sanchez de Esa.
The device can also be used as a power system device such as a keyboard and wireless mouse, a speaker, and the like. In addition to consumer electronics, it can also be used in the industrial environment, as the power source of robots or vans, and the first prototype of electrophysiological devices (pacemakers, defibrillators, etc.) are being developed, the researchers said. .

Flowmeter

Plastic Flowmeter is a widely used instrument in water treatment engineering, mainly used for flow detection, usually installed after the water pump, to control the water intake of each structure, currently the most widely used are electromagnetic flowmeter and ultrasonic flowmeter. In the selection of the flowmeter, the first thing to consider is the corrosiveness of the measured medium to the flow-passing parts, so as to avoid affecting the service life of the flowmeter due to the corrosion of the medium; During the design and installation process of the flowmeter, the length of the straight pipes before and after the flowmeter needs to be considered. Usually, the principle of 5D before and 3D after the flowmeter is followed. Here, D is the inner diameter of the pipe. If the length is insufficient, the measurement accuracy will be affected. When using an ultrasonic flowmeter, the distance between the first 10D and the rear 5D must be met, and the distance from the flowmeter to the water pump must be more than 30D.

When selecting the type, the flow rate of the medium in the pipeline needs to be between the maximum value and the minimum value of the selected flowmeter, and avoid approaching the maximum or minimum value, so as to avoid affecting the measurement accuracy.

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