| 摘要 |
PROBLEM TO BE SOLVED: To provide a radio security device for reducing power consumption on guard. SOLUTION: A radio sensor 10 is configured of a sensor 11 for detecting an abnormality, a transmitting/receiving circuit 14 for executing bi-directional communication with a radio gateway, a switch 16 for turning on/off the power source of the sensor 11 and a switch 17 for turning on/off the power source of the transmitting/receiving circuit 14. The transmitting/receiving circuit 14 transmits the information of the abnormality detected by the sensor 11 to a radio gateway 20, and receives information transmitted from the radio gateway 20. The switch 16 is turned on, and the switch 17 is turned off on guard. When any abnormality is detected by the sensor 11 on guard, the switch 17 is turned on, and the abnormality detected by the sensor 11 is transmitted to the radio gate 20 by the transmitting/receiving circuit 14, and when a confirmation response transmitted from the radio gateway 20 is received by the transmitting/receiving circuit 14, the switch 17 is turned off. COPYRIGHT: (C)2005,JPO&NCIPI
|
