| 摘要 |
The present invention refers to an improvement in or relating to an alarm system (1) attached to at least one glass pane (4) and which comprises at least one circuit (8) for each glass pane (4) such as hardened glass, float glass, decorative glass in the form of, for example, single-ply glass, lamellar glass, thermopane or combinations of these, where polycarbonate and PVB foil in the lamellar glass can also be included, which circuit (8) is connected to at least one electric loop (2), which has a voltage applied across it, where by an alarm is started when the value of resistance in the electric loop (2) is changed, whereby the electric loop (2) with the circuit (8) is connected to at least one electrical voltage converter (3), which provides galvanic insulation between the electric loop (2) including the circuits (8) and the other electronic components. |
