Fiber bragg grating soil pressure sensor
An earth pressure sensor and fiber grating technology, which is applied in the sensing field, can solve the problems of inability to quickly sense the change of the earth pressure bearing value and insufficient sensitivity, and achieve the effects of compact structure, wide measurement range and strong durability.
Inactive Publication Date: 2020-03-31
SHIJIAZHUANG TIEDAO UNIV
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Problems solved by technology
[0004] The purpose of the embodiment of the present invention is to provide a fiber grating earth pressure sensor, which aims to solve the technical problem that the existing fiber grating sensor is not sensitive enough and cannot quickly sense the change of the earth pressure bearing value
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[0052] See figure 2 As a specific implementation of the fiber grating soil pressure sensor provided by the present invention, the transverse partition 200 includes a middle plate 210 and two side plates 220 respectively arranged at both ends of the middle plate 210. The middle plate 210 and the two side plates 220 are respectively In a sealed connection, the X-shaped frame 500 is slidably connected with the middle plate 210, the two side plates 220 correspond to the two vertical partitions 900 one by one, and one middle plate 210 is connected to the corresponding vertical partition 900, the side walls of the housing 100 and The bottom plate encloses a first cavity 910, and the other middle plate 210, the corresponding vertical partition 900, the side walls of the housing 100 and the bottom plate enclose a third cavity 930.
[0053] The transverse partition 200 is composed of two side plates 220 and a middle plate 210. The side plates 220 and the middle plate 210 can be made of th...
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The invention provides a fiber bragg grating soil pressure sensor, which belongs to the technical field of sensing, and comprises a shell, a transverse partition plate arranged in the shell, an X-shaped frame, an elastic beam and a fiber bragg grating attached to the elastic beam. The transverse partition plate divides an inner cavity of the shell into an upper cavity body and a lower cavity body.The upper cavity is filled with fluid; the fluid is used for uniformly transmitting the pressure borne by the top plate of the shell to the transverse partition plate; the X-shaped frame is arrangedin the lower cavity; the X-shaped frame comprises a first supporting beam and a second supporting beam which are arranged in a crossed mode and hinged through a pin shaft. One end of the elastic beamis connected with the lower part of the first support beam, and the other end is connected with the lower part of the second support beam; the fiber grating is used for monitoring the elongation of the elastic beam. The fiber bragg grating soil pressure sensor provided by the invention can realize real-time monitoring of soil pressure, and can be widely applied to various complex environments.
Description
Technical field [0001] The invention belongs to the field of sensing technology, and more specifically, relates to a fiber grating soil pressure sensor. Background technique [0002] At present, the existing earth pressure gauges on the market are divided into sensing principles, which are mainly divided into vibrating wire type, pneumatic type, resistance strain type and fiber grating type. Among them, vibrating wire earth pressure gauges, pneumatic earth pressure gauges and resistance strain earth pressure gauges all use electricity as the sensing signal. In some harsh environments that are flammable, explosive, strong electromagnetic interference, and require remote detection, It's hard to come in handy. Fiber grating soil pressure meter is a new type of fiber optic displacement sensor that can form a sensor network system. It has many advantages of fiber optic sensors, the most important of which is that the sensing signal of fiber grating sensor is wavelength modulation. T...
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Login to View More IPC IPC(8): G01L1/24
CPCG01L1/242
Inventor 张浩钟志鑫段君淼郭志利翟步升李晓瑾周畅
Owner SHIJIAZHUANG TIEDAO UNIV