Abstract
A miniaturized electromagnetic acoustic transducer (EMAT) is developed for impact acoustic wave detection. In this new sensor design, two neodymium iron boron (NdFeB) permanent magnets are used to provide high magnetic field and make the EMAT to be compact in size (13×5×5 mm3). The effect of a sensor's geometry on its frequency response was numerically analyzed for determining the size of EMAT during the sensor design. Miniaturized EMAT sensors were constructed and tested for detection of impact acoustic waves in aluminum plates of different thicknesses. To validate the experimental results of the EMAT sensor, the impact acoustic waves generated by a small dropping ball have been analytically calculated. Experimental results show good agreement with the analytical ones.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
