Distributed coaxial cable strain sensor with adjustable reflectivity and manufacturing method thereof

Abstract

The invention discloses a reflectivity adjustable distributed coaxial cable strain sensor which comprises a casing, a metal tube, a metal semicircular press sheet, a coaxial cable, waterproof terminals and a fixed screw, the metal tube is provided with a threaded hole, the fixed screw is screwed into the threaded hole of the metal tube, the metal tube is horizontally mounted in an internal middle position of the casing, the coaxial cable penetrates the metal tube and protruded out of left and right ends of the casing via the waterproof terminals, and the metal semicircular press sheet is inlaid in a slit between the metal tube and the coaxial cable. Thus, the coaxial cable strain sensor is high in anti-interference capability, shielding performance, flexibility, resolution, applicability and stability, stable in data transmission, and capable of adjusting the reflectivity of reflection points, and provides guarantee for the production efficiency and sensor stability.

Description

technical field [0001] The invention relates to various coaxial cable strain sensors, in particular to a distributed coaxial cable strain sensor with adjustable reflectivity and a manufacturing method thereof. Background technique [0002] At present, sensors are playing an increasingly important role in people's lives, such as acceleration sensors used in automobiles and MEMS sensors on electronic products such as mobile phones; similarly, stress / strain sensors used to monitor the deformation of objects have also been developed. A wide range of applications, monitoring and early warning of geological disasters. However, its technology and products are basically local monitoring, that is to say, quasi-distributed monitoring, such as resistance strain gauges, vibrating wire sensing elements, optical fiber sensors, etc. The monitoring range of these quasi-distributed sensors is too small, and their texture is easily damaged. damage, so the monitoring ability has been lost bef...

AI Technical Summary

Problems solved by technology

However, its technology and products are basically local monitoring, that is to say, quasi-distributed monitoring, such as resistance strain gauges, vibrating wire sensing elements, optical fiber sensors, etc. The monitoring range of these quasi-distributed sensors is too small, and their texture is easily damaged. damage, so the monitoring ability has been lost before the object under test is damaged, and it cannot meet the full monitoring of structural damage under extreme environments and disasters, nor can it monitor the entire object under test in all directions; therefore, for the safety of major engineering structures Sensors with large range, large gauge distance, and distributed monitoring mode are urgently needed for monitoring

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