基于超声导波的螺栓轴向应力测量方法
杨宇1(),杨昌群2,赵勃3,4()
Measurement method of bolt axial stress based on ultrasonic guided waves
Yu YANG1(),Changqun YANG2,Bo ZHAO3,4()

图8. 小波滤波器的频谱图

Fig.8. Spectrum diagram of wavelet filter