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 comprises a bottom cover, a top cover and a side wall. The inner side surface of the bottom cover is provided with a first fiber grating. The vibration detection module comprises a cantilever beam and a metal ball, wherein the metal ball is arranged at one end of the cantilever beam, and a second fiber grating is arranged on the cantilever beam. The pressure detection module comprises two force bearing rods, sliding hinges and strain transmission elements, wherein one ends of the two force bearing rods are arranged on the inner side face of the top cover through the sliding hinges, and the other ends of the two force bearing rods are arranged at the two ends of the first fiber grating through the strain transmission elements respectively. According to the soil pressure and vibration integrated sensing device, the cantilever beam is additionally arranged inside and the optical fiber is laid, so that the soil pressure and vibration integrated sensing device has dual functions of measuring pressure and vibration in soil. According to the preparation method, the processing period is shortened, and the preparation cost is reduced.

Description

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

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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