Abstract��To the problem of the weak echo signal and low signal noise ratio of the electromagnetic acoustic testing�� by the way of taking the multistage booster in the transmission circuit and impedance matching in the coil circuit�� it realized high power emission to improved the detection sensitivity and signal noise ratio. An experiment research for aluminum piece was made through the designed transmission system�� it concluded��as the emission voltage increased�� the echo signal was improved linearly�� the signal-to-noise was also increased. Transmission coil circuit was matched by a reasonable choice of capacitance�� it also improved intensity of echo signal. When used together�� it would help to improve the electromagnetic acoustic flaw detection sensitivity.
��Ӣ��. ��ߵ�ų���̽�������ȷ�����̽��[J]. �й������ڿ���, 2015, 33(5): 13-17.
QI Ying-hao. Discussion about method of increasing the electromagnetic acoustic flaw detection sensitivity. Chinese Journal of Iron and Steel, 2015, 33(5): 13-17.
2015, Vol. 33 
