MAGUS
제품문의
기술문의
Technical
  • Technical Information
  • Downloads
  • Principle of Strain Measurement
    Strain initiated resistance change is extremely small. Thus, for strain measurement a Wheatstone bridge is formed to convert the resistance change to a voltage change. Suppose in Fig. 3 resistances () are R1, R2, R3 and R4 and the bridge voltage (V) is E. Then,the output voltage e o (V) is obtained by the following equation:
    Suppose the resistance R1 is a strain gage and it changes by R due to strain. Then, the output voltage is,
    If R1 = R2 = R3 = R4 = R in the initial condition,
    Since R may be regarded extremely larger than R,
    Thus obtained is an output voltage that is proportional to a change in resistance, i.e. a change in strain. This microscopic output voltage is amplified for analog recording or digital indication for strain measurement.
    Back to top
    Inquiries from the Web

    Inquiry(sales@magus.kr)

    Support(support@magus.kr)

    Quotations

    Orders

    Catalog Request