The detecting solution of bolt stress by research the relationship between the bolt axial force and ultrasonic propagation time rate of change. Using the time of ultrasonic transmission and reception to measure the tightening axial force of the bolt. It is also can meet the fast and accurate requirements of customers for bolt stress detection.
Detection speed fast. Just place the probe at any end of the bolt to analyzed directly, it’s more convenient compared with the wrench.
Flexible to use. The ultrasonic equipment is compact, convenient, energy conservation, it can rely on the portable small-capacity battery to work for a long time.
Reliable detection result. The torque wrench will be affected by the friction force caused by the nut and screw due to rust and other reasons when testing the tightening force, resulting in inaccurate measurement result, The ultrasonic stress detector directly reads the comparison value of the difference in sound velocity caused by the internal stress change of the bolt with the standard model. The accuracy is higher than the torque wrench.
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