| 摘要 |
<p>A data relay system (1) is provided with a data logger apparatus (2) a relay reader apparatus (3) a relay tag apparatus (4) and a tag reader apparatus (5). The data logger apparatus (2) generates alarm information on the basis of a sensor input and transmits the alarm information to the relay reader apparatus (3). The relay reader apparatus (3) collects the alarm information from a plurality of data logger apparatuses (2) integrates the collected alarm information to generate integrated alarm information and transmits the integrated alarm information to the relay tag apparatus (4). The relay tag apparatus (4) stores the integrated alarm information received from the relay reader apparatus (3) and transmits the integrated alarm information as a response to a data request signal from the tag reader apparatus (5). The alarm information is generated in a format in which the alarm information can be transmitted from the data logger apparatus (2) to the tag reader apparatus (5) and the integrated alarm information is generated in the same format as that of the alarm information. Thus the data logger apparatus can be installed at a location beyond the reach of radio waves from the tag reader apparatus.</p> |
