Non-contact damage detection device of carbon fiber sucker rod

Abstract

The invention relates to a non-contact damage detection device of a carbon fiber sucker rod. The non-contact damage detection device is characterized by comprising a light source (1), double convex lenses (2), a micropore (3), double convex lenses (4) and a spectroscope (5) are sequentially arranged along the light path direction of light emitted by the light source (1), wherein the emitting end of one side of the spectroscope (5) is provided with the carbon fiber sucker rod (6), and the emitting end of the other side of the spectroscope (5) is provided with a reference mirror (11); the interference output end of the spectroscope (5) is provided with double convex lenses (15); the double convex lenses (15) transmit optical signals to a spectrograph (18) through optical fibers (17); and the output end of the spectrograph (18) is connected with a computer (19) with a data acquisition and processing system through a communication bus. The non-contact damage detection device can measure the tiny damage of the surface or the near surface of the carbon fiber sucker rod (6) and has high measurement accuracy capable of reaching a submicron grade.

Description

technical field [0001] The invention belongs to the technical field of material performance testing and structural damage detection, and in particular relates to a non-contact damage detection device for a carbon fiber sucker rod. Background technique [0002] Rod pump oil recovery is the most widely used mechanical oil recovery technology at home and abroad. Due to the influence of factors such as the depth of the well and the quality of the steel sucker rod, the efficiency of mechanical oil recovery is greatly reduced. The number of accidents caused by the shortage of the sucker rod itself accounts for 60%-70% of the accidents in the pumping well. In addition, the traditional metal sucker rod has become a "bottleneck" restricting the development and expansion of this oil recovery method due to its shortcomings such as heavy weight, easy corrosion, and poor fatigue performance. Carbon fiber continuous sucker rod has the characteristics of light weight, high strength, high ...

AI Technical Summary

Problems solved by technology

This method has a fast detection speed and a large observation area, but the error is large when measuring the size of the defect (about 200 microns)

In addition, due to the sensitivity of the heat map to the non-uniformity of the material, it may also cause misjudgment of some specimen defects.

[0004] In summary, there is still no detection method in our country that can accurately detect the surface or near-surface internal structure of carbon fiber sucker rods, especially the micron-level damage detection

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