Introduction
Thickness gauge is a tool commonly used to measure the thickness of materials, which plays an important role in industrial production and quality control. However, when measuring with a thickness gauge, couplings are often needed to ensure accurate measurement results. The coupler can fill the gap between the measuring head and the material to be measured, eliminate the air to block the ultrasonic wave, improve the ultrasonic wave propagation efficiency, and thus improve the measurement accuracy and accuracy. This paper will deeply discuss the principle, types, application methods, influencing factors and future development trend of thickness gauge coupler, so as to provide a reference for readers to fully understand this key tool.
Basic principle
The basic principle of the coupler is to use the coupler to fill the gap between the measuring head and the material to be measured, and effectively transfer the ultrasonic wave to the inside of the material to be measured, so as to achieve accurate thickness measurement. The coupler can fill the tiny gap between the measuring head and the surface of the material under test, ensuring that the ultrasonic wave can be fully transmitted to the inside of the material under test. The coupler can eliminate the air barrier to the ultrasonic wave, reduce the energy loss, and improve the propagation efficiency of the ultrasonic wave. The coupling agent can improve the coupling efficiency between the measuring head and the material under test, ensuring that the ultrasonic wave can accurately penetrate the material under test and return, thus achieving accurate measurement.
Type of coupling agent for thickness gauge
Liquid coupler is the most common kind of coupling agent, usually water or water-based liquid, with good conductivity and coupling effect. The gel coupler is viscous and can better adhere to the surface of the measuring head and the measured material, improving the coupling efficiency and measurement accuracy. The solid coupler is usually a solid film or sheet, which can be directly attached to the surface of the measuring head and the material to be measured, and is suitable for special environment or special material measurement.
Usage method
Before making a measurement, clean the surface of the material to be measured and the measuring head to ensure that the surface is flat and free of impurities. Apply an appropriate amount of coupler to the surface of the measuring head or the surface of the material to be measured to ensure uniform coverage and avoid bubbles and voids. According to the characteristics of the measured material and measurement requirements, adjust the parameters of the thickness gauge, such as frequency, gain, etc. Place the thickness gauge on the surface of the material to be measured according to the requirements of the operation manual, start the measurement procedure, and obtain the measurement results. After the measurement, clean the coupling residue on the measuring head and the surface of the measured material in time to maintain the measurement accuracy and accuracy.
Matters needing attention
The surface roughness, water absorption and other characteristics of different materials will affect the selection and use effect of coupler.
Environmental factors such as temperature and humidity will affect the fluidity and coupling effect of the coupler.
The method and technique of applying coupler will affect the uniformity and quality of coupler.
The quality and purity of the coupler directly affect its conductivity and coupling effect.
Peroration
As a key auxiliary tool, the coupling agent of thickness gauge plays a vital role in the measurement process. Through in-depth understanding of its principle, types, use methods, influencing factors and future development trends, we can better understand and apply this key tool to ensure the accuracy and reliability of measurement data. Thickness gauge couplings will continue to play an important role in a variety of industries and fields, providing reliable assurance for quality control and production safety.