Highspeed

Crash tests on terror defense by road blocks filmed on the premises of the CTS Crash Test Facility in Münster, Germany during a conference in October 2017.

Blue Paw Artists has been making documentary films for international broadcasters like National Geographic, Discovery and the BBC and domestic clients including ZDF, ARTE, ARD and BR for the last 20 years.

Crash test of the nose (crashbox) of a formula student car from AMZ Racing from the ETH in Zürich – one of the most successful teams is this series!

The high-speed impact of a droplet on a bulk fluid at high Weber number is not well understood but is relevant to the production of marine aerosol by raindrop impact on the sea surface. These splashes produce a subsurface cavity and a crown which closes into a bubble canopy, but a floating layer of immiscible oil, such as a crude oil slick, alters the splash dynamics.

With the help of a special image intensifier camera and a laser, which illuminates the joint area, a new attempt is made to visualize the impact in electromagnetic pulse welding.

Filming the welding process is accompanied by an additional obstacle in addition to the high-speeds: During this process, a bright light covers the actual joint area. The bright process glare can be suppressed by a trick. As the glare is usually whitely, it can be concluded that its intensity is spread almost constantly across all (visible) wavelengths.

The temporal behavior of mode instabilities in active large mode area fibers is experimentally investigated in detail. Thus, apart from the onset threshold of mode instabilities, the output beam is characterized using both high-speed camera measurements with 20,000 frames per second and photodiode traces.

The vibration created by a sonic toothbrush ranges between 200 and 400 Hz. This means 24,000 - 48,000 movements per minute. With high-speed vibration, the sonic vibrating toothbrush can effectively clean the teeth and keep the mouth healthy. But have you ever seen how it works? What happens when it runs at high speed?

High-speed imaging of a droplet shows that the droplet behaves like a ball when it falls onto a piece of waterproof material. It will be compressed and bounces into the air after it drops and hits the material. To film this amazing phenomenon, a high-speed camera that can achieve extremely low exposure time, high frame rate and most importantly high sensitivity to capture the moment is required to show you the truth.

We use synchrotron X-ray radioscopy to study particle dynamics and analyse particle motions by applying novel image processing techniques. The aim of this work is to observe interactions between particles or particle clusters and the film surfaces, and to understand how liquid flow in films is reduced and film stability increased by such particles.

With an X-ray experiment at the European Synchrotron ESRF in Grenoble (France), Empa researchers were able to demonstrate how well their real-time acoustic monitoring of laser weld seams works. With almost 90 percent reliability, they detected the formation of unwanted pores that impair the quality of weld seams. Thanks to a special evaluation method based on artificial intelligence (AI), the detection process is completed in just 70 milliseconds.