A soil pressure and vibration integrated sensing device and preparation method thereof

Abstract

The invention discloses a soil pressure and vibration integrated sensing device and a preparation method thereof. The device is mainly composed of a main body, a vibration detection module and a pressure detection module. The main body includes a bottom cover, a top cover and a side wall, and the inner side of the bottom cover is provided with a first optical fiber grating. The vibration detection module includes a cantilever beam and a metal ball, the metal ball is arranged at one end of the cantilever beam, and a second optical fiber grating is arranged on the cantilever beam. The pressure detection module includes two load-bearing rods, a sliding hinge and a strain transfer element, one end of the two load-bearing rods is arranged on the inner surface of the top cover through a sliding hinge, and the other end of the two load-bearing rods is connected through a strain transfer element. Elements are respectively arranged at both ends of the first fiber grating. The soil pressure and vibration integrated sensing device has dual functions of measuring pressure and vibration in the soil by adding a cantilever beam inside and laying optical fibers. The preparation method shortens the processing period and reduces the production cost.

Description

technical field [0001] The invention relates to the field of fiber grating sensors, in particular to a soil pressure and vibration integrated sensing device and a preparation method thereof. Background technique [0002] With the continuous popularization of fiber grating, all kinds of fiber grating sensors have emerged, and gradually become the main monitoring means in various monitoring fields. In the past ten years, great progress has been made in the research and development of sensors, and various forms of stress and displacement sensors have emerged one after another. In recent years, fiber grating sensors have been developed to the stage of measuring temperature, circumferential stress, acceleration, and total earth pressure, and are widely used in embankment detection, road and bridge construction. However, most of the currently developed optical fiber sensors are single-function sensors, and there is no sensor that can measure soil pressure and vibration at the sam...

AI Technical Summary

Problems solved by technology

But the ensuing problem is that roads and bridges are overloaded or slope soil collapses frequently, which brings great harm to people's life and property safety.

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