Sensor device and fixing method for ultrasonic guided wave detection of weld seam

Abstract

The invention discloses a sensor fixing device for detecting a welding line by ultrasonic guided waves. The sensor fixing device comprises a plurality of sensing units, a fixed belt and two clamping units, wherein the fixed belt is vertical to the welding line in the length direction; the plurality of sensing units which are side by side are symmetrically arranged on the welding line and welding plates at two sides of the welding line 4; the upper ends of the plurality of sensing units are fixed at the middle lower part of the fixed belt respectively; the lower ends of the plurality of sensing units are abutted against the arc-shaped convex welding line and the welding plates at the two sides of the welding line respectively; the clamping units are used for respectively fixing the two ends of the fixed belt on the welding plates; a sensor is embedded into a sensor clamp. The sensor fixing device is simple in structure, convenient to operate, stable, reliable and relatively strong in applicability; all the sensors mounted on the welding line and the welding plates at the two sides of the welding line are not limited by the shape and the size of the welding line, the strength of receiving echoes is enhanced and the length of the measureable welding line is greatly improved, so as to provide a reliable way for efficiently detecting the far-distance welding line. The measurement range is enlarged, and the detection efficiency and the detection precision are improved.

Description

technical field [0001] The invention relates to a non-destructive testing device for welds, in particular to a sensor device for detecting defects in butt welds by using ultrasonic guided waves, and belongs to the technical field of non-destructive testing. Background technique [0002] Welding is a process and connection method that produces an interatomic bond between two workpieces through heating, pressure, or both. Defects such as cracks, incomplete fusion, pores, undercuts, etc. will appear at the weld. For ships, mechanical equipment, pressure vessels, and welded structural parts that require welding processing, according to the requirements of current regulations and general practices, for welding. Butt welds generally require a certain amount of ultrasonic or radiographic testing to ensure product quality. [0003] The traditional ultrasonic detection technology is a point-by-point scanning method, which is not only time-consuming and laborious, but also has certai...

AI Technical Summary

Problems solved by technology

The existing weld guided wave detection sensor is fixed on the weld seam and the welding plates on both sides of the weld seam by hand. Hand-held fixing is laborious, and it cannot ensure that the bottom of the sensor is pressed tightly on the weld seam and the welding plates on both sides of the weld seam. , affecting the effect of weld flaw detection

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