| 摘要 |
<p>PURPOSE:To search an invader to which position of the outer wall of facility(atomic power plant, etc.) intrude by utilizing the change of a resistance value, impedance, and electrostatic capacity between the terminals of a pressure sensitive cable. CONSTITUTION:An inside elastic conductive layer 2 is formed on the center conductor 1 of the pressure sensitive cable by performing extrusion molding in thickness of 0.8mm and bridge treatment of conductive silicon rubber composition with volume proper resistivity 4OMEGA-cm. An insulating braid layer 3 consisting of a tetronic system is provided on the layer 2, which forms an air insulating layer. Thence, an outside elastic conductive layer 4 is formed by performing the extrusion molding in thickness of 0.8mm and bridge treatment of the conductive silicon rubber composition similarly as in the above case. A protective casing 6 is formed on the layer 4, which comprises a pressure sensitive stripe P. A controller C measures the resistance value to a point where the pressure sensitive cable is short-circuited from both terminals, and compares it with a reference resistance value, and finds distance to the point where short-circuit occurs.</p> |
