Fiber grating sensor for simultaneously measuring two-dimensional inclination and vibration and measurement method thereof

Abstract

The invention discloses a fiber grating sensor for simultaneously measuring two-dimensional inclination and vibration and a measurement method thereof. The sensor comprises a thin-walled square barrel, a thin-walled square barrel fixed base, a round ball, a shell, a roller elastic bracket, a roller bracket, a roller and a plurality of fiber gratings; the shell is a hollow cylinder with an open bottom end; the thin-walled square barrel is fixedly connected with the thin-walled square barrel fixed base, and the thin-walled square barrel and the thin-walled square barrel fixed base are fixed in the shell together; the round ball is a hollow round ball with a certain wall thickness, and is positioned in the thin-walled square barrel; one end of the roller elastic bracket is fixed on the shelland the other end of the roller elastic bracket is fixedly connected with the roller bracket; the roller bracket is used for mounting the roller; and the plurality of fiber gratings are respectively adhered to the outer wall surface of the thin-walled square barrel and are used for measurement. According to the fiber grating sensor and the measurement method thereof, which are disclosed by the invention, simultaneous measurement on slope inclination and emergency vibration can be implemented, a problem of incomplete slope safety information monitoring can be solved, and meanwhile, a problem that due to bending of an inclination measurement pipe in the later period of monitoring, the sensor is difficult to take out and cannot be reused is solved.

Description

technical field [0001] The invention belongs to the technical field of optical fiber sensing, and in particular relates to a fiber grating sensor and a measuring method thereof for simultaneous measurement of two-dimensional inclination and vibration, and is suitable for an environment in which inclination and vibration are simultaneously monitored. Background technique [0002] In order to meet the needs of engineering construction, the mountain body is often excavated to form a large number of slopes. Slopes are prone to landslides when they are affected by heavy rain, snowmelt, tsunamis, and nearby construction vibrations. According to incomplete statistics, major landslide accidents occur in our country every year, causing a large number of casualties and property losses. Therefore, it is very necessary to carry out effective slope safety monitoring. [0003] In slope safety monitoring, the use of inclinometers is the most common and extensive. Traditional electric incl...

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Problems solved by technology

[0005] Aiming at the above-mentioned problems in the prior art, the present invention provides a fiber grating sensor and its measurement method for simultaneous measurement of two-dimensional inclination and vibration, which can realize simultaneous measurement of slope inclination and sudden vibration, and can solve the problem of slope safety. The problem of incomplete information monitoring also solves the problem that the sensor is not easy to take out and cannot be used again due to the bending of the inclinometer tube in the later stage of monitoring

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