| 摘要 |
FIELD: security devices. SUBSTANCE: grid is braided from wire spirals which are protected by polymer coating. N alarm circuits having two branches are produced by setting jumpers at ends of spirals on edges of grid. Ends of circuits are locate on one edge of grid. Checking resistor is inserted between ends of branches of each circuit, connection of wire spirals are insulated. Wire spirals of grid that belong to different branches of circuits are connected in alternating order according to their serial number from 1 to 2N. Connection may follow specific order or be without it. Jumpers connecting ends of wire spirals on each edge of grid are located in closed housing. EFFECT: increased security of fencing different objects. 4 cl, 1 dwg |
