Patent ID: 9261420
Filing Date: 2016-02-16
CPC Classification: B25B,G01L,G06F

Claim Text:
1. A digital device for measuring an axial load of a torque-shear-type high strength bolt, comprising: a main body connected to an electromotive wrench fastening a torque-shear-type high strength bolt; a measuring unit disposed in the main body and measuring an axial load of the torque-shear-type high strength bolt; a power supply formed in the main body and comprising a power lead-in portion for receiving power from outside and a power lead-out portion for supplying the power to the electromotive wrench; and a display unit displaying a measuring result of the axial load of the torque-shear-type high strength bolt measured by the measuring unit, wherein the measuring unit comprises: a current detector for detecting alternating current (AC) supplied to the electromotive wrench through a current sensor using a DC voltage of 0 to 5V; a sampling unit for performing sampling within a preset range with respect to the electric current detected by the current detector; and a calculation unit for analyzing a data value sampled by the sampling unit based on an axial load calculation algorithm and calculating the axial load.