What is ultrasound testing?

Ultrasonic testing is the use of high -frequency sound for material control. The sound frequency usually ranges from 0.5 MHz to 25 MHz, which is significantly over what one hears. High -frequency sound is used because it is able to penetrate mostly materials without difficulty, allowing non -destructive testing. It is usually used to find cracks, measure the depth of material and control of corrosion and imperfections.

The ultrasonic test works by reflecting the sound of the object and interpreting the resulting echo. It passes through the material until the sound waves do not harm with irregularity. Operators usually notice this as "discontinuity". The operator can determine whether there is a defect in the material.

materials such as metals, ceramics and plastics can be measured by ultrasonic testing. Ultrasonic thickness testing is mainly done by calculating the time that requires sound to bounce bottom material. Different materials usually reflect sound at different speeds. By measuring the change at the time the sound is reflected, the operator is able to measure the thickness of each material on a multilayer surface.

There are several types of ultrasonic test devices depending on the required application. The selection of the device is generally dictated by temperature, thickness, geometry and facilitating the material phase. The ultrasonic test device usually has three components: converter, clutch and imaging system. The technician operates an ultrasonic test device by manually moving the probe over the surface of the tested object and interprets the resulting data.

The converter or probe creates and receives sound. Normally the converter sends the sound either in direct beam or at the angular beam. Direct beam sensors are widely used than converters with angular beam, which are often used to test ultrasonic weld.

Bathy is applied to the surface tested to act as a mediumOver and surface. Its main purpose is to transmit sound to the surface. It also increases accuracy by preventing the loss of sound waves. Baths are often made of gel or paste. However, water is often used as a clutch when using a converter.

Data from the test can be read using a display system. The display usually contains controls and processor. In some portable devices, the converter is also integrated into the imaging system.