| 摘要 |
PROBLEM TO BE SOLVED: To solve such problems that a position sensor must perform signal transmission in a cordless manner when used, for example, in a machine tool with ATC (automatic tool changer) function, and an electromagnetic induction system adapted conventionally as the signal transmission system therefor has trouble with the attachment position or space of an electromagnetic coil, a radio system has trouble by interference, and an infrared system has trouble by external adverse environment. SOLUTION: In the machine tool, a faint AC signal is applied using a connected structure as a floating medium, and an oscillating circuit contained in the position sensor is magnetically coupled with a receiving circuit provided in the machine tool, whereby the signal transmission between the position sensor and a receiver is performed in a cordless manner. COPYRIGHT: (C)2011,JPO&INPIT |
