Data gathering system
专利汇可以提供Data gathering system专利检索，专利查询，专利分析的服务。并且PURPOSE: To inexpensively constitute a environmental data gathering system by monitoring the speaking state of a public telephone set and disconnecting it from a switched line and connecting a sensor device to the switched line to transmit the data signal of the sensor with a public telephone network as the data transmission line if the public telephone set is in the non-speaking state.
CONSTITUTION: A sensor device 200 always monitors the speaking state of a public telephone set 205; and if it is not in the speaking state, a speaking monitor circuit 202 outputs a control signal to disconnect the public telephone set 205 from a switched line l by a line switching circuit 201 and a data transmission circuit 203 is connected to the line l. On the other hand, various environmental states are detected by a sensor circuit 204 and various data are transmitted by the transmission circuit 203. Sensor devices 200
1 ∼200
n-1 having the same constitution as this sensor device 200 are installed in respective places and data at respective observation points are gathered to a data gathering device 100 through a public telephone network 300.
COPYRIGHT: (C)1988,JPO&Japio，下面是Data gathering system专利的具体信息内容。
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