| 摘要 |
<p>The flashing warning light and its control circuitry, for warning of e.g. a road accident, can be incorporated into a system containing several such warning lights. The light has a battery housing and beam forming unit. Each light has its own independent synchronisation device which causes all lights in the system to flash in synchronism. The synchronisation device has a transmitter to send out signals to the other warning lights and a receiver to receive signals from them. The signals transmitted are modulated RF signals.</p> |
