To provide an autonomous guard/home state of things information system which is constituted of a few sensors and which can securely and inexpensively detect the existence of a man, the opening/closing of a door or the movements of a man and to provide a sensor used for the system.
The sensor 1 of a differential micromanometer-type, an infrared ray sensor 2 and a microcomputer (CPU) 3 to which both sensors 1 and 2 are connected are provided. The sensor 1 of the differential micromanometer-type and the infrared ray sensor 2 are provided in a closed space 4 where the door 5 is provided. The movement of the man and the opening/closing of the door 5 in the closed space 4 are detected by the sensor 1 of the differential micromanometer-type and the existence of the human body by the infrared ray sensor 2. Thus, the existence of the man, the movement of the man and the opening/closing of the door 5 can securely be detected.
| JP2001208629 | DIFFERENTIAL PRESSURE MEASURING INSTRUMENT |
| WO/2009/065174 | COMPARATIVE PRESSURE MONITORING INSTRUMENT |
WATANABE YOSHIJIROU
YAMANDA KATSUKI
MIYANO HIROBUMI
COMPUTER HIGHTECH KK
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