| 摘要 |
An intrusion detector 400 is provided that is tunable in order to distinguish between true alarm events (such as a shock wave generated by a thief tampering with a window 422 of a residence 420), and false alarm events (such as shock waves generated by weather conditions). The intrusion detector 400 may be tuned locally by an operator, or remotely via an intrusion detector threshold remote controlling means. A number of discrete pre-calibrated threshold levels are provided allowing for discrete tuning of an intrusion threshold of the intrusion detector 400. The thresholds may be adjusted via a discrete input such one or more push buttons 406, and preferably displayed on a display 404 such as a seven segment display, LCD dot matrix display element, or array of LED elements. The discrete enumeration of levels of the intrusion threshold of the shock wave detector thus enables tuning the intrusion threshold to a precise numeric value representing one of a plurality of discrete pre-calibrated threshold levels. |
