?????? ?? ? ??

2. ??? ??? ?? ? ?? (???????)
Reference
[1] James W. Dally and William F. Riley 1978 Experimental Stress Analysis. TOKYO: McGRAW-HILL
[2] Strain Gauge Instruction Manual. KYOWA
Electrical-Resistance Strain Gauge
????? ???? ?? ????? ???(mechanical) ??, ???(Optical) ??, ???(Acoustic) ??, ???, ???(Electrical) ??? ??[1]. ? ??? ????, ?? ??? ?? ??? ??? ??? ?? ??(Electrical-Resistance) ???? ???? ? ???? ??.
Strain Gauge? ??? ?? ???? ? ????? ?? ??? ??(Steel, Wood, Composite, Glass, etc.), ??? ??(Rosette Pattern), ?? ??, ??? ??(Gage Factor), ???? ??, ?? ?? ???? ??. ?? ??? ??? ?? ? ???? ???? ??? ???? ???? ??, ?? ??? ?? ???? ??? ??? ??? ??? ??? ????? ??. ??? ??? ????? ?? ??? ??? ??? ???? ???, ?? ??(Sensitivity)? ??? ??. ? (1)? ??? ?? K? ???? ???. R? ??? ? ????? ?? ????.
Strain Gauge Bridge Circuitry
? ??? ???? ??? Wheatstone ???(bridge)? ??? ???. ? ???? ???? ???? ???? ??? ??, Quarter Bridge, Half Bridge, Full Bridge? ???? ??. ? (2)? ??? ??? ??? ???? ??? ?? ?? ??? ?? ?? ?? ??? ??? ???? ???. ? ??? ??, ? ??? ??? ?? ??? ???? ??.