NDT Ultrasonic Testing (UT) Equipment

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Non-Destructive Testing (NDT) technology refers to a method that detects internal and surface defects of materials or finished products without compromising their stru……

Non-Destructive Testing (NDT) technology refers to a method that detects internal and surface defects of materials or finished products without compromising their structure or performance. It utilizes changes in heat, sound, light, electricity, magnetism, etc., caused by abnormalities or defects within the material’s structure. Using physical methods and advanced technical equipment, NDT can complete the detection of internal and surface defects.

Ultrasonic Testing (UT) is an important method in NDT, using high-frequency sound waves to probe for internal flaws in materials.

Working Principle of Ultrasonic Testing Equipment

UT equipment generates high-frequency sound waves that are transmitted into the material under test. When these sound waves encounter interfaces or defects within the material, phenomena such as reflection, refraction, or scattering occur. The receiver captures these returned signals and analyzes the material’s internal structure based on the signal’s time, amplitude, and shape. Different defects cause different echo characteristics, and by comparing with standard samples or theoretical models, one can determine the location, size, and type of defect.

Main Components of Ultrasonic Testing Equipment

Transducer: Responsible for transmitting and receiving ultrasonic signals. The design of the transducer depends on specific application requirements; for example, contact transducers are used for direct placement on the surface of the workpiece, while immersion transducers are suitable for testing workpieces submerged in liquid.

Pulse Generator: Provides energy to the transducer for emitting ultrasonic waves.

Receiver Amplifier: Enhances the weak signals received by the transducer for further processing.

Display: Shows signal data from the receiver, allowing operators to interpret results by observing waveforms on the screen.

Data Recording and Analysis System: Used for storing test data and performing post-processing and analysis of the data to help identify specific information about defects.

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