Research on the piezoelectric transducer for bolt sound velocity detection

In order to establish a rapid and simple technology for detecting bolt stress, according to the theory of ultrasonic propagation, this paper established the relationship between between sound velocity and stress-free in bolts, studied theory of piezoelectric transducer design and selected the piezoelectric transducer suitable for detecting the sound velocity of the bolt. Finally, the entire system was designed and tested by experiment. The experimental results showed that improved piezoelectric transducer can directly detect the sound velocity of bolts, and ensured the accuracy requirements at the same time. It provided a new idea and method for the ultrasonic detection of bolt stress.