| 摘要 |
PURPOSE:To accurately determine the stop position of the carriage by detecting the stop position from the rate between a binary code which is provided on the flank of the carriage and varies continuously at a constant rate in the front-rear direction and the binary-coded signal of an image pickup means which is provided on the ground. CONSTITUTION:A position detecting device 3 is provided at the stop position of the carriage 1 in the lateral direction of the position detection mark 2 on the carriage 1 and this positioned detecting device 3 is provided with CCD image sensors 4a and 4b at the right and left positions where an image of the position detection mark 2 is picked up. The binary code on the flank of the carriage 1 varies at the constant rate in the front rear direction. A signal from the position detecting device 3 is sent intermittently to a ground controller and a command is sent from the ground controller to the carriage 1 until the carriage 1 stops at a proper position. Consequently, the carriage 1 can accurately be positioned at the stop position. |
