| 摘要 |
This invention relates to an intrusion-warning wire fence formed, at least partly, by a plurality of barrier or fence wires (1), substantially parallel to each other and stretched taut between two supports, for example two poles (2). The distance between two adjacent barrier wires (1) is smaller than that which is required for permitting a person to pass therethrough. The invention provides one or more sensor wires (9) each comprising at least one optical conductor (10) connected to a warning and/or alarm system which is activated when said optical conductor (10) is either broken or compressed. Said sensor wires (9) are associated with at least part of said barrier wires (1) and with at least one back-pressure edge (8, 13) so as to be compressed against said back-pressure edge (8, 13) as a result of an increase in the tension of the associated barrier wire (1) above the initial tension of installation, and to such an extent as to activate the warning and/or alarm system. Therefore, this system is activated when two adjacent barrier wires (1) are spread appart so as to form an opening for the passage of a person.
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