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Current issue

ELEKTRO 12/2019 was released on December 4th 2019. Its digital version will be available on January 4th 2020.

Topic: Measurement engineering and measuring instruments

Main Article
Innovative process in partial discharge of AC and DC voltage diagnosis

SVĚTLO (Light) 6/2019 was released on December 9th 2019. Its digital version will be available on January 9th 2020.

Professional organizations activities
Light technology konference of Visegrád countries LUMEN V4 2020 – 1st announcement
23rd International conference SVĚTLO – LIGHT 2019
56th Conference of Society for development public lighting in Plzeň
What is new in CIE

Interiors lighting
Halla illuminated new Booking.com offices in Prague centre

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