| 摘要 |
PURPOSE:To improve an accuracy of a position detecting device by connecting a sensor part and an electronic converting circuit part by a special coaxial tube cable, and also widening an effective area of a probe of a sensor. CONSTITUTION:As for a sensor 11' of an electrostatic capacity type, its detecting area is wide remarkably. A special coaxial tube cable 6, a converting circuit 12, an indication adjusting part 9 and a display lamp are provided. When the sensor 11' having a wide probe area is used, a variation of an electrostatic capacity following a passage of an object to be detected 3 becomes large, therefore, an S/N can be improved, and also a detecting distance between the object 3 to be detected and the sensor 11 can be enlarged as shown by D. The distance D can be enlarged up to 250mm.. Since an area of a sensor prove is large, a variation of an electrostatic capacity following a passage of the object to be detected becomes large, therefore, a control point is set easily to an optional detecting position. |
