| 摘要 |
PURPOSE: A crack sensor system and a crack sensing method are provided to control the drive power consumption of the ultrasonic sensor tag by the ultrasonic sensor existing as the sleeping mode. CONSTITUTION: The crack sensor system includes: a time measurement part(110); a ultrasonic wave detecting part(120); a storage part(140); a wireless LAN communications module(160); a ultrasonic wave sensor tag(100); and a crack detecting server(200). The time measurement part measures the current time. The ultrasonic wave detecting sensor can sense the ultrasonic wave applied in outside. In the storage is the ultrasonic wave sensor, the ultrasonic wave sense information including the time of sensing the ultrasonic wave is stored. The wireless LAN communications module transmits the ultrasonic wave sense information outside. The ultrasonic sensor tag includes the driving electric power source supply spart(180) supplying the drive power to each elements. The crack detecting server includes communications module(220) and crack determining unit(260). The ultrasonic wave sense information are transmitted to the communications module by forming the wireless LAN communications module and communications channel. The crack determining unit decides the crack generation of tunnel from the ultrasonic wave sense information.
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