The ultrasonic measurement technology of bolt axial tightening force was researched and developed according to the theory of acoustic elasticity. According to the theory of acoustic elasticity, the time of ultrasonic propagation and the axial stress of the bolt have a certain linear relationship when the ultrasonic transverse wave and the longitudinal wave propagate along the bolt axis. The detection system accurately measured the propagation time of ultrasonic shear wave and longitudinal wave along the bolt axis and introduced relevant parameters, and indirectly calculated the numerical value of axial prestress of bolts.
|HS BLT Technical parameters||Measure mode：Pulse echo（Standard）
Measure range：bolt diameter≥8mm
Sound time detection precision ：±10ns
Inspection precision of bolt fastening force：≤±5%
Overall dimension：260mm（Length） x 185mm（width） x 75mm（thickness）
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