Attention-grabbing signals: it’s all in the flicker

A novel development in LED technology has opened up new possibilities for optical signalling in factories. Enhanced Visibility System (EVS) is the name WERMA has given to this latest development, and it takes advantage of the fact that flickering lighting effects are highly effective at attracting our attention.

During its development, WERMA’s R&D department asked test candidates to judge a series of different light signals to determine the most eye-catching light. A stochastic flickering light was discovered to have the optimum attention-grabbing characteristic, and EVS was born. According to WERMA, the light effect of this system is completely new and distinguishes it from all previous systems.

Thanks to its powerful attention-grabbing effect, EVS light is particularly useful for signalling acute or highly important conditions. The EVS element can also be deployed in hazardous situations or in areas where immediate action is required.

The EVS system uses light emitting diodes (LEDs). A microprocessor generates random signals to switch the LEDs, giving the light a very ‘agitated’ characteristic, which proves highly effective in drawing the attention of those in its vicinity – even when only seen from the corner of the eye.

Hitherto, LED signal devices have confined themselves to imitating the light effects of light bulbs or Xenon flashes, EVS, however, utilises a particular strength of LEDs, which are capable of generating the required high flickering frequency with ease. Xenon flash tubes, for example, cannot operate at these frequencies.

And, of course, there are several advantage to be gained from using LEDs, not least being their resistance to vibration and shocks, their long life and low energy consumption.

Contact Details and Archive...

• WERMA (UK) Limited

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