| 摘要 |
<p>A system (100) for detecting and signalling failure to fasten a safety helmet (1) is described comprising means for detecting fastening (7), positioned near the fastening system (2, 202) of the helmet, to detect whether it has been fastened and accordingly activate/de-activate the emission of alarm signals, via an acoustic and/or illuminated warning device (6) powered by a battery (8).</p> |
