Intermittent power supply of constant voltage source in strain type sensor
XU De-zhang · Journal of Anhui University of Technology and Science · 2005
The output characteristics of the bridge circuit which supplied with constant voltage source are analysed.The increase of the supply voltage of the bridge circuit is limited by the permitting power consumption of the bridge arms,which also hinders the enhancement of the sensitivity of the bridge voltage,and there arises the temperature-rise and thermal noise in resistances.As for those problems mentioned above,a method of intermittent power supply of constant voltage source is introduced in this paper,which not only enhances the sensitivity of the sensor but also effectively reduces the temperature and thermal noise of resistances.Eventually,the precision of sensor is enhanced.