Industrial scale ultrasonic automatic scanning and imaging detection device

Abstract

The invention belongs to a nondestructive detection technology and relates to an industrial scale ultrasonic automatic scanning and imaging detection device used for large-scale structures made of composite materials and metal materials in the fields of aviation, aerospace, electronics, weapons, ships, metallurgy, iron and steel, transportation, construction and the like. The detection device comprises an ultrasonic automatic scanning system, an ultrasonic automatic scanning control and imaging system and a multi-channel ultrasonic system. The design according to the invention adopts a multi-axis parallel numeric control upward floating type super-static steady scanning mechanism and an ultrasonic flexible self-adaptive tracking array acoustic scanning technology, thereby greatly improving the ultrasonic automatic scanning and imaging detection efficiency and the imaging quality of the large-scale structures, realizing the industrial scale high-efficient ultrasonic automatic scanning and imaging detection of the large-scale structures made of the composite materials and the like in different specifications and enabling the detection resolution and a surface blind zone to achieve 0.13mm; and when 20 channels are detected, the efficiency is improved by at least 50 times compared with the manual scanning detection efficiency, and is improved by 20 times compared with the traditional single-channel ultrasonic automatic scanning detection.

Description

technical field [0001] The invention belongs to the non-destructive testing technology, and relates to an industrial-grade ultrasonic automatic scanning imaging testing equipment used for large-scale structures of composite materials and metal materials in the fields of aviation, aerospace, electronics, weapons, ships, metallurgy, steel, transportation, construction, etc. Background technique [0002] At present, large-scale structures such as composite materials mainly adopt the pulsed ultrasonic vertical longitudinal wave penetration / reflection detection method, and the ultrasonic transducer transmits / receives the acoustic wave signal to the tested part to realize the defect detection. This detection method requires that the acoustic wave signal emitted by the ultrasonic transducer propagates along the normal direction of the detected position of the part. Manual and automatic scanning methods are adopted, and the parts to be inspected are scanned by moving the ultrasonic ...

AI Technical Summary

Problems solved by technology

Its outstanding shortcomings are: since large structures such as aircraft composite materials have almost no microscopic plane features, during the automatic scanning process, it is necessary to continuously adjust and control the attitude and scanning position of the transducer in real time to ensure that the direction of the incident sound wave is consistent with the current position. The direction of the shape and surface is consistent to realize the transmission and reception of ultrasonic detection signals. The more complex the shape of the part to be tested, the more complex the attitude and position adjustment of the transducer, the higher the technical cost, and the higher the requirements for the numerical control and coordinate axes of the equipment. Wing-type composite material structures usually require at least a complex scanning mechanism with 5-6 axes linkage to realize the adjustment of the attitude and position of the transducer. The technical cost and maintenance cost of the equipment are high, and this adjustment method needs to generate scanning trajectories first. Scanning can only be realized, and the engineering applicability is poor

Its obvious shortcomings are: the scanning and tracking efficiency is very low, and the engineering practicability is poor. After leaving the mold tooling for large structures such as composite materials, the parts are in a free state, and their shape is far from the theoretical model; the actual profiling measurement and teaching programming , the efficiency is too low, and in order to prevent mistakes and damage parts, the generated scanning trajectory must be taught and tested. For example, for a large composite material structure of L (length) × W (width), the generated scanning trajectory needs to be M lines, each scanning trajectory needs profiling and measurement points to be K, then there will be M×L×W×K, even for a 7000×3000mm airfoil composite structure, when the scanning step is 2mm, each If the scanning trajectory is sampled by an average of 20 feature points, 30,000 teaching points will be measured, and the workload of measuring and teaching will be very time-consuming and inefficient

[0005] At present, ultrasonic automatic scanning inspection equipment for large-scale structures such as wing composite materials mainly adopts single-channel inspection, and its outstanding shortcomings are: the inspection efficiency is very low, and the more complex the parts to be inspected, the lower the inspection efficiency

[0007] Existing ultrasonic automatic scanning mechanisms with structures such as composite materials mainly adopt a profile frame structure, and the parts to be tested are placed vertically. The outstanding shortcomings are: the rigidity of the scanning mechanism is not good, the long-stroke bilateral drive in the x scanning direction is difficult to synchronize, and the y direction is large. The span deflection is large, and the scanning vibration in the z direction is large

[0008] The existing ultrasonic automatic scanning imaging detection equipment, when detecting large structures such as composite materials, has its outstanding shortcomings: large blind area for surface detection and low longitudinal detection resolution

[0009] At present, ultrasonic automatic scanning detection of large-scale structures such as composite materials mostly uses water spray to realize the coupling of sound waves. Difficulty in water recovery and filtration

[0010] For non-destructive testing of large structures such as composite materials, its outstanding shortcomings are: complex and cumbersome CNC trajectory programming is required according to the structure of the composite material to be tested, low detection efficiency, poor engineering applicability, high technical cost, and poor imaging effect

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