Ultrasonic dual-wave high-reliability measurement method and apparatus for bolt stress

An ultrasonic dual-wave reliability measurement apparatus for a bolt stress, comprising:

• a measurement module, comprising a first ultrasonic dual-wave transducer and a second ultrasonic dual-wave transducer arranged at both ends of a measured bolt, wherein the first ultrasonic dual-wave transducer is configured to transmit and receive an ultrasonic transverse wave or an ultrasonic longitudinal wave, the second ultrasonic dual-wave transducer is configured to receive the ultrasonic transverse wave or the ultrasonic longitudinal wave, and the first ultrasonic dual-wave transducer and the second ultrasonic dual-wave transducer have a function of triggering synchronous communication of transmitting and receiving;
• a measurement module, configured to propagate the transverse wave or longitudinal wave generated by the first ultrasonic dual-wave transducer in the measured bolt;
• and measure TOF for which the first ultrasonic dual-wave transducer and the second ultrasonic dual-wave transducer receive echo signals respectively;
• and
• a verification module, configured to verify measured data, wherein if a difference between the TOF for which the first ultrasonic dual-wave transducer receives the echo signal and double of the TOF for which the second ultrasonic dual-wave transducer receives the echo signal in a same mode is not greater than a quarter of one transmission period T, the measured TOF satisfies verification requirements, or if the difference is greater than a quarter of one transmission period T, the measured TOF does not satisfy verification requirements.