Working principle of electromagnetic acoustic transducer thickness gauge

Electromagnetic acoustic transducer thickness gauge is an industrial equipment that uses electromagnetic acoustic transducer (EMAT) technology to measure the thickness of an object. Its working principle is based on the principle of electromagnetic acoustics. It measures the thickness of an object by emitting sound waves. It has the advantages of high precision, non-contact measurement, and no influence from the surface state of the workpiece.

Overview of working principle

Electromagnetic acoustic transducer thickness gauge measures the thickness of an object by emitting sound waves. When a sound wave enters from one medium into another, it will be attenuated. The degree of this attenuation depends on the density of the two media and the frequency of the wave. The attenuation of sound waves can be used to measure the thickness of a material because the attenuation rate of sound waves in different materials can be measured. The thickness measurement results of the electromagnetic acoustic transducer thickness gauge are not affected by the angle and have high measurement accuracy; no coupling agent is required, and the measurement is more convenient; the oxide scale and paint on the surface of the rough workpiece have no effect on the measurement results of the workpiece; the thickness can be measured through the coating. ‌

Technical features

‌Non-contact measurement‌: no direct contact with the object to be measured is required, reducing the risk of damage during the measurement process.

‌High precision‌: The measurement results are accurate and are not affected by the surface state of the workpiece, including oxide scale, paint, etc.

‌Fast detection‌: Suitable for scenes where it is difficult to stop the machine for detection, such as high-temperature and high-pressure pipelines.

‌Strong adaptability‌: Suitable for thickness measurement of a variety of magnetic and conductive materials.

Application scenarios

Electromagnetic acoustic transducer thickness gauges are widely used for thickness measurement in the industrial field, especially in the detection of high-temperature and high-pressure pipelines, storage tanks and other equipment that cannot be stopped for detection. Due to its non-contact and high-precision characteristics, it is particularly suitable for industrial environments with high safety requirements. In addition, since it can measure thickness through the coating, it also has important applications in anti-corrosion layer thickness detection, material quality control, etc.

In summary, the electromagnetic acoustic transducer thickness gauge provides an efficient and accurate solution for thickness measurement in the industrial field through its unique working principle and technical characteristics, especially in scenes with high safety and precision requirements. It plays an important role.