| 摘要 |
As weight restrictions become more stringent, air, train and bus passengers are being faced with the increasing cost of excess baggage weight. The proposed system makes use of transducers built into the bag or its handle both for weight monitoring and for theft protection. In the weight monitoring mode, designed for use during packing, an excess weight alarm is triggered when a preset maximum value is exceeded. In the theft protection mode, the transducer signal triggers an alarm as soon as the bag is picked up, thus giving early warning of possible theft. In this mode the signal is preferably transmitted to an external device such as a cellular phone for remote audible and/or visible indication. Because the circuits are switched on only when the suitcase or bag is picked up, battery life is practically equal to shelf life, hence ensuring high system availability.
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