| 摘要 |
The personal token card, which may be configured with the form factor of a Smartcard or of a PCMCIA card, includes at least one sensor for sensing environmental conditions and an output device for outputting signals representative of the environmental conditions. The sensor may sense radiation levels, chemical and biological toxins, temperature or pressure, or other conditions. The output device may generate an alarm, such as an audible or visual alarm, or may simply output recorded environmental data, either electronically or using a radio frequency output. A memory is provided for recording digitized data and a logic element is provided for analyzing recorded data to detect whether predetermined thresholds have been exceeded. A battery power supply is also provided to provide power for the various components. The power supply, as well as many of the other components, may be activated or deactivated in accordance with enablement signals received from an external system. For example, the battery may be activated only when needed, to thereby conserve power.
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