DC-Excited Thermostrain-Gauge Signal-Conditioning Circuit

The figure illustrates a dc-excited Anderson-loop circuit that includes (1) thermocouples for measuring the temperature of the strain gauge and (2) a signal-conditioning circuit that separates the temperature and strain-gauge signals in the sense that one output voltage is proportional to the change in the strain-gauge resistance and another voltage is proportional to the thermoelectric voltage indicative of the temperature of the strain gauge.