| 摘要 |
PROBLEM TO BE SOLVED: To detect, with a sensor, a state change in an object even at a place where a commercial power supply is not available, and automatically collect a detection signal while saving power.SOLUTION: A sensor data collection system comprises: a plurality of nodes 117 that have respective specific node IDs but do not include a power supply; and a control device 7 that communicates with the plurality of nodes in accordance with a 1-wire (R) protocol. The plurality of nodes include a plurality of sensors 116 that are installed at a plurality of places and detect a change in the states of a plurality of objects; and holding means for holding information detected by the respective sensors. The control device includes: a control unit that transmits a polling signal to the plurality of nodes at prescribed timing and obtains sensor detection information held by the nodes; a memory that stores the obtained sensor detection information; and a power supply that supplies power at least to the control unit.SELECTED DRAWING: Figure 1 |
