| 摘要 |
<p>The present invention relates to a system for monitoring contact or close proximity between one or more sources of contact within an environment and to one or more devices suitable for implementing such a system. Each source of contact is provided with a monitoring device. Each monitoring device comprises an indicator unit and a detecting unit. The indicator unit is operable to emit a signal and the detecting unit is operable to detect and identify signals of the type emitted by the indicator unit of another monitoring device and output an information signal indicative thereof.</p> |
