| 摘要 |
PROBLEM TO BE SOLVED: To provide laminated glass for crime prevention and a laminated glass system for crime prevention, which allow destruction of a glass panel to be precisely detected with a simple structure and have small power consumption. SOLUTION: In laminated glass 10 for crime prevention, two electrodes 22 and 24 are disposed in a corner part 11 of a heat-treated glass plate 18. A filament 26 connecting two electrodes 22 and 24 is disposed along the corner part 11 of the heat-treated glass plate 18. An evaluation unit 14 is externally attached through the heat-treated glass plate 18 placed inside a room so as to face two electrodes 22 and 24. The evaluation unit 14 includes two capacitor electrodes 30 and 32 forming a series capacitor between two electrodes 22 and 24, and a shield electrode 38. The evaluation unit 14 uses capacity voltage conversion to charge the charges to a capacitance and measures the capacity by the discharge time. COPYRIGHT: (C)2008,JPO&INPIT
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