Pressure and vibration dual-purpose sensor measuring device and preparation method

Abstract

The invention discloses a pressure and vibration dual-purpose sensor measuring device and a preparation method. The pressure and vibration dual-purpose sensor measuring device is mainly composed of a main body, a vibration sensing module and a bottom cover. The main body comprises a first diaphragm, a first fiber grating sensor and a side wall, the first diaphragm is arranged at the top end of the side wall, and the first fiber grating sensor is fixedly connected to the first diaphragm. The vibration sensing module comprises a metal ball, a cantilever beam, a second fiber grating sensor and a third fiber grating sensor, one end of the cantilever beam is arranged in the side wall, the metal ball is arranged at the other end of the cantilever beam, and the second fiber grating sensor and the third fiber grating sensor are fixedly connected to the cantilever beam. The bottom cover is arranged at the bottom end of the side wall, and a cavity is formed by the bottom cover and the body. The device is manufactured through a 3D fused deposition printing manufacturing method, integrated design is achieved, and pressure and vibration can be measured at the same time. The preparation method shortens the processing period and reduces the manufacturing cost.

Description

technical field [0001] The invention relates to the field of optical fiber grating pressure sensors, in particular to a pressure and vibration dual-purpose sensor measuring device and a preparation method. Background technique [0002] Fiber Bragg grating is a new type of fiber optic passive device developed in recent years. Fiber Bragg grating can be regarded as a narrow-band filter. When light is incident, it reflects light of a specific wavelength, while light of other wavelengths is projected there. When the temperature or strain changes, the period and refractive index of the grating will change, which will cause the wavelength of the fiber grating to drift. With its excellent performance, it is widely used in various engineering fields. As far as civil engineering is concerned, fiber grating sensors are also widely used in practical projects such as roads, bridges, and slope soils. [0003] Currently commonly used sensors generally use traditional molding methods, an...

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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