| 摘要 |
<p>PROBLEM TO BE SOLVED: To flexibly deal with various signal lamp control patterns in a single circuit constitution. SOLUTION: This monitoring device includes a G lamp detection sensor group 1 which detects the lighting/non-lighting state of an advance signal lamp G that permits the advance of every signal lamp, a dummy signal generator 2 which generates the dummy deciding condition signals according to the different signal lamp control patterns, and a deciding circuit 3 which decides a normal or abnormal lighting pattern of every signal lamp based on the signals of the group 1 and the generator 2. In such a constitution, it's possible to monitor the signal lamps in a single circuit constitution just by generating a proper dummy signal when the signal lamp control patterns are different from each other.</p> |
