Using Ultrasound Waves for Thickness Measurement

Using Ultrasound Waves for Thickness Measurement

INSPECTION AND TESTING METHODS

Principle

Ultrasonic waves propagate in a given material at a specific speed. A sample of the same material and of known thickness is used to calibrate the thickness gauge.

An ultrasonic wave is emitted by a mono- or bi-element longitudinal wave transducer through the material and is reflected by the opposite face of the wall. Measuring the round-trip time of the wave then makes it possible to determine the thickness of the wall.

Advantages

• Access to only one side of the component is required.
• Easy to implement.
• Immediate results.