| 摘要 |
PURPOSE:To prevent the output from being displayed with detection error of a direction needle left when doors of the direction needle are opened, by providing a door sensor group, which generates the output when doors are opened, and a controller which displays the output, which is detected with the direction needle before outputs of door sensors, onto a display device. CONSTITUTION:Outputs of door sensors 11-14 and outputs Vns and Vew of a direction needle are taken into a microcomputer 30. In accordance with outputs of door sensors 11-14, it is discriminated whether all door sensors 11-14 are turned off or not. If all doors are closed, a direction thetan is calculated on a basis of outputs Vns and Vew of the direction needle 2. A preceding direction thetan-1 is updated to the calculated direction thetan, and the new direction is outputted. If any of four doors is opened, the direction thetan-1 which is stored in a memory of the microcomputer 30 and is calculated on a basis of the output of the direction sensor at the last time is not updated and is outputted as it is. The output of the microcomputer 30 is displayed on a display device 4 through a driver 32. |
