Use a thin-film strain gauges Figure 9 B has a diameter of 7 mm 2 mm length of the coil resistance of 120 ohms, the gauge factor 2.10 ± 1% and a flume bridge. Bridge circuit typically consists of four resistor has a resistance value R1, R2, R3, R4 to a bridge circuit. A power supply across the arms of the bridge, a, c and a current detection on the bridge at the end of the arm b, d [5] Figure 9 A.
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