| 摘要 |
<p>A system for detecting illumination and luminance in a road tunnel is provided to predict times for cleaning or exchanging lamps by detecting the illumination and the luminance. A system for detecting illumination and luminance in a road tunnel includes a plurality of lamps, a tachometer(8), an external illumination sensor(10), an external luminance sensor(12), a controller(20), and a display. The plurality of lamps are installed at regular intervals. The tachometer outputs pulses every predetermined intervals complying with a speed of a vehicle. The external illumination sensor detects brightness of the lamps based on the pulse. The external luminance sensor detects road luminance in the tunnel. The controller is connected to the external illumination sensor and the external luminance sensor for controlling the detection signals for changes of the illumination and the luminance. The display shows the detecting signals by receiving control signals of the controller.</p> |
