norton39stheorem(53,88)(编辑修改稿)内容摘要：
train, R is the nominal resistance, GF is the Gauge Factor Backing Foil ECE201 Lect14 8 Typical values • Measured strain values are typically fairly smallusually less than 103. • GF is usually close to 2. • Typical values for R are 120W, 350W, and 1000W. • A typical change in resistance is DR = 2•103•120W = ECE201 Lect14 9 Measuring Small Changes in R • To measure such small changes in resistance, the strain gauge is placed in a Wheatstone bridge circuit. • The bridge circuit uses an excitation voltage source and produces a voltage that depends on DR. ECE201 Lect14 10 The Bridge Circuit R+DR Vex R R R + – Vout + – ECE201 Lect14 11。阅读剩余 0%
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