| 摘要 |
PURPOSE:To provide an optimum condition to the running of a driver even though the smog transmissivity is changed, by providing a tunnel measuring board to measure the smog transmissivity in the tunnel, and a processing device to calculate and process the ON/OFF control of luminous apparatuses in the tunnel depending on the output of the measuring board. CONSTITUTION:A tunnel lighting system is composed of a lighting control board 1, a tunnel measuring board 2, a transmission child station 3, a transmission parent station 4, and a processing device 5. In such a constitution, the ON/OFF control to luminous apparatuses 8 in the tunnel is carried out in the control board 1 depending on the signals from luminance meters 6 near the entrance and the exit of the tunnel, and the signals input from smog transmissivity meters 7 set in the tunnel, through the measuring board 2. In the child station 3, the delivery of signal is carried out between the control board 1 and the measuring board 2, and in the parent station 4, the transmission of signal is carried out with the child station 3, and the data is delivered to the processing device 5. In the device 5, the necessary luminance at the entrance and at the exit is calculated depending on the signal of the luminance meters 6, and at the same time, the necessary luminance at the intermediate parts in the tunnel is calculated depending on the signals of the transmissitivity meters 7, and the ON/OFF control to the luminous apparatuses 8 is carried out. |
