| 摘要 |
A burglar alarm system to detect the breaking of a pane of a sealed multiple pane panel comprises in one embodiment a sensor responsive to the humidity intermediate the panes of the panel, a burglar alarm, and a microprocessor or detector operably connected to the sensor and alarm, the detector being adapted to actuate the alarm when the sensor detects a change in the humidity. In a preferred embodiment the system comprises a sensor responsive to an atmospheric parameter (such as humidity or pressure) intermediate the panes of the panel, a burglar alarm, a slow leak warning device, and a detector operably connected to the sensor on the one hand and the alarm and warning device on the other hand. The detector actuates the alarm when it detects a rapid increase in the parameter being sensed by the sensor, such a rapid increase being indicative of a broken pane such as might occur in the course of a burglary, and actuates the warning device and when it detects a more gradual change in the parameter being sensed, and the parameter being sensed exceeds a certain predetermined limit, this being interpreted as a defective seal in the panel.
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