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Current issue

ELEKTRO 12/2020 was released on December 2nd 2020. Its digital version will be available on January 2nd 2021.

Topic: Measurement, testing, quality care

Main article
Long-term test of innovated sliding contact

SVĚTLO (Light) 6/2020 was released 12.14.2020. Its digital version will be available on 12.18.2020.

Fairs and exhibitions
Looking back at twenty second anniversary of Designblok
Competition of journal Světlo (Light) at FOR ARCH and FOR GARDEN fair 2020

Architectural and scenic lighting
Lighting design in a nutshell – Part 48
Light design for Vivaldianno show
Světlík (skylight) – workshop with light and about light for children

Smart, self-powered ping-pong table

29. 11. 2019 | Tech Xplore | www.techxplore.com

A team of researchers from China and the U.S. has built a smart, self-powered ping-pong table. In their paper published in the journal Nature Communications, the group describes how the table was built and how it powers itself.

As anyone who has ever watched a table-tennis match can attest, it is a game that moves very quickly—in some cases, too quickly for the human eye to see what happens. In professional or Olympic level games, such speed has necessitated the use of electronic sensors that can see rapid events human judges cannot, such as whether a ball hit the top edge or the side edge of the table. The distinction can make a difference in a match.

Smart ping-pong table

But such sensors must be powered by batteries, which, the researchers note, not only have a limited lifetime, but have negative environmental impacts. In this new effort, the researchers have found a new way to power the sensors by embedding triboelectric nanogenerators (TENGs) in the surface of the table, allowing the table to power itself. TENGS, the researchers note, can convert mechanical energy into electricity. Sensors in the smart table convert the mechanical energy of a ball impacts into electricity that is used to power sensors.

Read more at Tech Xplore

Image Credit: NPG Press