| 摘要 |
Novelty: electronic system intervening to the operation of the front door of urban buses for the security of passengers (fig.3). Constitution: the movement sensor 10 characterised in that it is liable to be installed at the potential places 18 and in that it is of restricted activity range for controlling the movement solely at the prohibited area (before the security barrier 19). In case of passengers standing at the area 19, the electronic circuit of the invention (fig.1) stops the operation of the front door (light and sound signal being activated). Purpose: to deter the standing of passengers before the security barrier; to ensure the necessary right visual field for safe driving. |
