With the development and application of composite material technology, the application of air coupled ultrasonic imaging detection technology in various fields such as aerospace has been increasing year by year. In the application of various composite materials, the use proportion of various foam and honeycomb structures also increases. Due to the significant sound attenuation of these materials, coupled with the fact that the transduction efficiency of air coupled ultrasound technology itself is much lower than that of conventional ultrasound detection technology. There is an urgent need for a detection technology and means that can meet the requirements of non-contact ultrasonic detection and compensate for detection sensitivity, thereby expanding the application scenarios of air coupled ultrasonic detection technology and making non-contact imaging detection of high attenuation co...

TECLAB Ding Xia shaw * teclab.cnSummary:The non-contact non-destructive testing of internal defects in lithium batteries has become increasingly important with the booming development of the new energy industry. This article introduces the basic principle of air coupled ultrasound imaging detection technology and tests Apple phone batteries, soft pack batteries, blade batteries, and lithium battery positive and negative electrode materials separately. The results show that this technology has a very broad application prospect in the lithium battery detection industry. key word:Air coupled ultrasound, lithium battery testing, non-contact ultrasound testing for lithium deposition Background:Lithium batteries, as a new type of green energy, are widely used in various fields such as electronic products and new energy vehicles due to their advantages of high energy a...

Ding Xia shaw * teclab.cn TECLAB ChinaSummary:Various voltage or power amplifiers are commonly used in ultrasonic non-destructive testing research to amplify the weak signal waveform generated by the function generator and excite the ultrasonic transducer to achieve detection. This article uses an arbitrary waveform high-voltage amplifier developed for the field of ultrasonic non-destructive testing for basic performance testing and verifies it through practical testing on various commonly used research cases. keyword:Arbitrary waveform amplifier, Gaussian signal, Chirp signal, high voltage amplifier, power amplifier Background:Common high-voltage amplifiers in the field of domestic ultrasonic non-destructive testing research include products from companies such as AR in the United States, E&I in the United Kingdom, RITEC in the United States...

TECLAB   Shaw. Din   shaw@teclab.cnSummary:This article mainly introduces two optimized non-destructive testing methods for detecting additive manufacturing (AM) parts: based on ultrasonic resonance spectroscopy RUS and fully focused phased array ultrasonic PAUT (using FMC full matrix acquisition and TFM fully focused imaging). According to the ISO/TC261-ASTM/F42 international standard, two testing methods are used to test star shaped parts manufactured using additive manufacturing. The parts contain typical additive manufacturing delamination defects of 100-700 μ m. The RUS method can identify whether parts contain defects, but it cannot determine the quantity, location, and size of defects. The detection effect of PUAT depends on the shape, direction, and position of the defect. The best detection effect is for ...

abstract：This article introduces two non-destructive testing techniques for carbon fiber composite materials based on ultrasound: AIRSCAN+air coupled ultrasonic non-destructive testing technology and PASCAN water immersed phased array C-scan ultrasonic testing technology. Imaging detection analysis was carried out for defects such as delamination, debonding, zone bending, and impact in resin based CFRP carbon fiber composite materials. By comparing the detection effects of two techniques for different defects, it was found that both methods can successfully detect various common defects in carbon fiber composite materials. Among them, AIRSCAN+air coupled ultrasound imaging detection technology is not limited by the thickness of the tested object, and various imaging methods can effectively detect and produce clear images. The PASCAN water immers...