| 摘要 |
PROBLEM TO BE SOLVED: To provide an electrode system of an electrostatic type proximity sensor which is of a thin type and is easily fitted and which thoroughly detects a detection object located at a close range and moreover has a high environmental resistance enabling stable operation even in heavy rainfall or hard freezing or with sticking of mud, a snow melting agent or the like, and the electrostatic type proximity sensor. SOLUTION: A first shielded electrode film Ssa and a second shielded electrode film Ssb are installed on an insulation base in juxtaposition in the surface direction while being isolated by insulation from each other, and a first detecting electrode film A is installed on the film Ssa and a second detecting electrode film B on the film Ssb, by the medium of an insulation film 31 respectively. Both of the two detecting electrode films A and B are covered with the insulation film and the film Ssa extends, so protruding as to surround the circumference of a portion wherein the film A is disposed, while the electrode film Ssb extends, so protruding as to surround the circumference of the portion wherein the film B is disposed. The electrode films A and B are charged respectively with voltage changing periodically and are made to discharge it, while the same potential is impressed between the films Ssa and A and between the films Ssb and B respectively. COPYRIGHT: (C)2011,JPO&INPIT |
