| 摘要 |
PURPOSE: A subway tunnel image apparatus is provided to enable a passenger in a subway train to see an advertisement image projected on the window of the subway train with the speed of the subway train being controlled at a constant value with a sensor installed on the outer side thereof. CONSTITUTION: The subway tunnel image apparatus consists of a sensor(40) installed by a window(30) of a subway train(20); an image device part(50) installed on the wall of a subway tunnel at a same height with the window of the subway train; a speed control device for controlling the speed of the subway train detected by the sensor; a lighting failure detecting device; and a central control device. The image device part comprises image frames; lighting devices installed at the rear side of the image frames respectively; and a sensor detecting plate for detecting signals from the sensor.
|
