An intelligent long gauge strain sensor and its manufacturing method

Abstract

The invention discloses an intelligent long scale distance strain sensor and a manufacturing method thereof. The intelligent long scale distance strain sensor comprises a sensing core and an intelligent module, wherein one end of the sensing core is connected with the intelligent module; the sensing core is composed of resistance wires and a reinforcement layer wrapping the resistance wires, and the reinforcement layer can be made of fiber reinforced composite material; a sleeve is arranged on the outer periphery of the reinforcement layer, a packaging layer is arranged on the outer periphery of the sleeve, and the packaging layer can be made of woven fiber composite material; the two ends of the packaging layer are respectively provided with a packaging anchoring point; the intelligent module is composed of a data acquisition chip and a wireless sensor. Compared with the prior art, the intelligent long scale distance strain sensor has the advantages that measuring performance and monitoring accuracy are improved and increased greatly, corrosion resistance and durability are enhanced, the measurement range is enlarged, intelligent data acquisition and transmission are achieved, and detection cost is low.

Description

technical field [0001] The invention relates to the technical fields of intelligent sensing and monitoring, information processing and civil traffic engineering. Background technique [0002] There are many forms of resistance strain gauges, commonly used wire and foil. It is made of constantan wire or nickel-chromium wire with a diameter of 0.02-0.05mm wound into a grid shape (or corroded into a grid shape with a very thin metal foil) and sandwiched between two layers of insulating sheets (base). The copper wire is connected with the strain gauge wire grid as the lead wire of the strain gauge, which is used to connect the measuring wire. The measurement principle of the resistance strain gauge is: the resistance value of the metal wire is not only related to the properties of the material, but also related to the length and cross-sectional area of ​​the metal wire. Paste the metal wire on the component. When the component is deformed by force, the length and cross-section...

AI Technical Summary

Problems solved by technology

[0006] 1) Insufficient durability

The packaging of traditional strain gauges is generally made of insulating paper, which is seriously damaged in harsh environments, so it is not suitable for long-term real-time monitoring, and it is difficult to meet the needs of long-term structural health monitoring

[0007] 2) The sensing gauge distance is short, not suitable for distributed monitoring

The traditional strain gauge sensing gauge is short, generally only 5mm-10cm, usually only suitable for "point" monitoring, and the "point" monitoring method is suitable for homogeneous and small structures, but for large, heterogeneous civil engineering structures It needs to be improved or secondary development

[0008] 3) The operation is cumbersome

Traditional strain gauges require external strain gauges to compensate for temperature, but cannot perform positioning compensation, which will affect measurement accuracy

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