| abstract |
The invention discloses a kind of quasi-distributed system, sensing device and methods measuring soil moisture content, wherein measuring the quasi-distributed system of soil moisture content, including sensing device, fiber grating demodulation equipment and computer；Sensing device includes fiber grating and hydrophilic rubber, and fiber grating and hydrophilic rubber are tightly packaged together；Fiber grating in sensing device leads to fiber grating demodulation equipment by optical fiber；Fiber grating demodulation equipment is connect with computer.The quasi-distributed system and method for the present invention can be connected multiple moisture content sensing devices using FBG multiplexing technologies on an optical fiber, sensing device is embedded in the soil body, it realizes quasi-distributed, the real-time monitoring to certain area and depth bounds soil moisture content, the distribution characteristics of moisture content and its effective information of variation is provided for the engineering properties study of all kinds of soil bodys and application.Sensing device obtains the moisture content of the soil body in situ by measuring optical-fiber deformation, reduces measurement error caused by sampling, transport. |