一、原理声发射检测是接收构件受载时内部缺陷由于屈服,开裂、裂纹扩展等而产生的应力波,并对应力波信号(即声发信号)进行分析处理,从而获得产生声发射信号的缺陷情况。描述声发射信号特征的参数主要有幅度、能量、上升时间,持续时间,振铃计数等,其意义见附图。其中能量参数是反映声发射信号的幅度和持续时间的综合值。 First, the principle of acoustic emission detection is received when the internal components of the component load due to yielding, cracking, crack growth and other stress wave generated, and the stress wave signal (ie, the sound signal) analysis and processing, resulting in the acoustic emission signal Defect situation. The parameters describing the characteristics of acoustic emission signals are amplitude, energy, rise time, duration, ring count, etc., the significance of which is shown in the attached drawings. Where the energy parameter is a composite of the amplitude and the duration of the acoustic emission signal.