Instrument Design for Rebar Deformation Measurement
Li Wei · Huagong zidonghua ji yibiao · 2012
In small deformation of resistive extensometer,the output voltage of electric bridge stays at a millivolt level.In order to keep the measuring precision within lp,m,the AD7705 converter with dual ADC channel was used to measure rebar deformation and to convert the data,and meanwhile,the piecewise linear deformation calibration approach was proposed.Experimental results show that this method can control measurement error as the JB/T 6146-2007 standards required.