| 摘要 |
PURPOSE: A timer for displaying passage time of a line bus is provided to initialize figure presented in display of timer as a sensor receives signals called whenever bus arrives at the station, and then display elapsed time with the increased figure such as 1min, 2mins, 3mins... on initialization of display. CONSTITUTION: Display(3) is formed in associated with a bus line guide sign(7) and includes LED or other luminous body as a dial plate displayed up to three figure of Arabic numerals. According to commandment of CPU, if RESET resets current information, elapsed time is again displayed in minute unit from initialization in order of 1 min, 2 mins, and 3 mins... in accordance with the function of time circuit. In this case, if three figure of the dial plate is displayed in 999 mins, CPU senses it and the dial plate keeps the situation of 999 mins, if sensor(2) senses signal(9) of infrared or other means having natural frequency or amplitude, the dial plate is initialized by commandment of CPU. |
