Ultrasonic nondestructive testing, also known as ultrasonic NDT or simply UT, is a method of characterizing the thickness or internal structure of a test piece through the use of high-frequency sound waves. Ultrasonic flaw detectors are one of the most common non-destructive testing technologies. The ultrasonic testing device generates waves with very short frequencies (0.1 - 15 MHz) and transmits them into the material being tested through a transducer probe and a thin film of couplant.
Modern ultrasonic inspection equipment is small, portable, microprocessor-based instruments suitable for both shop and field use. They generate and display an ultrasonic waveform that is interpreted by a trained operator, often with the aid of analysis software, to locate and categorize flaws in test pieces. The ultrasonic flaw detector for sale will typically include an ultrasonic pulser/receiver, hardware, and software for signal capture and analysis, a waveform display, and a data-logging module. Although some analog-based flaw detectors are still manufactured, most contemporary instruments use digital signal processing for improved stability and precision.
DSS, as the top 3 ultrasonic flaw detector manufacturers and ultrasonic flaw detector supplier in China, stocks a range of ultrasonic flaw detection equipment which provide unmatched capabilities for quickly and accurately detecting, locating and sizing defects in industrial applications such as corrosion, cracks, delamination, bonding irregularities and other discontinuities which may be hidden deep in the material. These versatile ultrasonic flaw detector machines combine excellent inspection performance and usability for a wide variety of applications including welds, forgings, turbines and other structural components.
As the professional ultrasonic flaw detector manufacturers and ultrasonic flaw detector supplier in China, DSS's comprehensive range of portable ultrasonic flaw detectors provide the end-user with unrivalled flexibility and performance in the field of non-destructive flaw detection. All ultrasonic instruments are field upgradable, reducing your downtime and increasing your working flexibility, rising to the challenge of your application. DSS is proud to offer some of the most powerful and rugged ultrasonic flaw detector machines on the market and our product development always focussed on the operator and end-user requirements.
Browse our range of ultrasonic testing device below.
Ultrasonic Testing (UT) uses high-frequency sound energy to conduct examinations and make measurements. Sound waves are simply organized mechanical vibrations traveling through a medium, which may be a solid, a liquid, or a gas. These waves will travel through a given medium at a specific speed or velocity, in a predictable direction, and when they encounter a boundary with a different medium they will be reflected or transmitted according to simple rules. This is the principle of physics that underlies ultrasonic flaw detection machine.
A typical UT inspection system consists of several functional units, such as the pulser/receiver, transducer, and display devices. A pulser/receiver is an electronic device that can produce high voltage electrical pulses. Driven by the pulser, the transducer generates high-frequency ultrasonic energy. The sound energy is introduced and propagates through the materials in the form of waves. When there is a discontinuity (such as a crack) in the wave path, part of the energy will be reflected back from the flaw surface. The reflected wave signal is transformed into an electrical signal by the transducer and is displayed on a screen.
There are two methods of receiving the ultrasound waveform, reflection, and attenuation.
In reflection (or pulse-echo) mode, the transducer performs both the sending and the receiving of the pulsed waves as the "sound" is reflected back to the device. Reflected ultrasound comes from an interface, such as the back wall of the object or from an imperfection within the object. The diagnostic machine displays these results in the form of a signal with an amplitude representing the intensity of the reflection and the distance, representing the arrival time of the reflection.
In attenuation (or through-transmission) mode, a transmitter sends ultrasound through one surface, and a separate receiver detects the amount that has reached it on another surface after traveling through the medium. Imperfections or other conditions in the space between the transmitter and receiver reduce the amount of sound transmitted, thus revealing their presence. Using the couplant increases the efficiency of the process by reducing the losses in the ultrasonic wave energy due to separation between the surfaces.
Some common applications include:● Weld inspection -- by far the most important market for ultrasonic flaw detection machine.