| 摘要 |
<p>The invention relates to a system preventing emergency vehicles to be stuck in a traffic jam, at road intersections controlled by traffic light. According to the invention, the system comprises a microcontroller board (MARD1) placed on-board in a motor vehicle, supplied with 9V from a supply unit (BA), which controls an orientation sensor (SO) which, together with a digital compass (BD), determines the cardinal coordinates and, by means of an emitting unit (E), the result of determinations is transmitted, by radiofrequency, with an operation frequency of 433 MHz, to a receiving unit (R) which is connected with another microcontroller board (MARD2) placed on the panel of a traffic light and supplied from it, the said board being intended to change the colour of the traffic light depending on the command received from the microcontroller board (MARD1) in the emergency motor vehicle, before the motor vehicle arrival to the road intersection.</p> |
