Ultrasonic probe for detecting R area of composite materials

Abstract

The invention belongs to the non-destructive testing technology of composite material structures and relates to an ultrasonic probe for detecting an R area of composite materials, which is characterized in that an annular spiral sleeve [3b] and a coupling body are arranged on the lower end face of a casing [3], wherein the coupling body is composed of a sealing ring [5], a water sac [6] and a water sac sleeve [7] and is connected with the annular spiral sleeve [3b] through inner threads on the water sac [6]. The ultrasonic probe ensures that stable ultrasonic detection signals are formed, ultrasonic detection with no dead area on the R area of the composite materials is achieved, detection effect and defect detection capability are improved, and detection leakage and wrong judgment can be avoided.

Description

technical field [0001] The invention belongs to the composite material structure non-destructive testing technology, and relates to an ultrasonic probe used for testing the R zone of the composite material. Background technique [0002] With the wide application of composite materials in aviation, aerospace, civil aviation, transportation, construction, electric power and other industrial fields, many key engineering structures and complex structures based on structural design and structural manufacturing of composite materials have been continuously installed and applied in engineering. Considering structural design or load bearing, various R zones will be formed in the transition zone or connection part of this type of structure, which is an inaccessible zone during non-destructive testing. These R zones play a very important role in structures such as composite materials. Structural connection, load distribution and bearing effect, in engineering, it is required to carry ...

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Problems solved by technology

The delay block 9 is in rigid contact with the surface of the R zone of the composite material part to be detected. Due to the uneven surface of the composite material and the R zone, this rigid contact is difficult to ensure that the surface of the delay block 9 forms a good and stable contact with the surface of the composite material and the R zone. Acoustic coupling, therefore, this rigid coupling is poor

When the inspector holds the ultrasonic probe for inspection, it is difficult to achieve good acoustic coupling between the surface of the delay block 9 of the ultrasonic probe and the surface of the tested composite material and the R zone, so it is difficult to ensure that the ultrasonic probe forms a stable ultrasonic wave in the tested composite material and the R zone. The detection signal will seriously affect the detection effect and easily lead to missed detection and misjudgment

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