The combined sensor using bridge circuit supplied by current sources for simultaneous measurement of two parameters

This paper describes a new features of resistance bridge supplied by two current sources placed in opposite arms. The possibility to simultaneous measurements of temperature and strain has been achieved by using this technique and it is described with some theoretical considerations. Theory is mentioned along with data to confirm that the temperature and strain gauge resistance changes are sensed without appreciable error. Also the results of an experiment confirm this approach. To complete these considerations the uncertainty of both temperature and strain changes is calculated. Also the possibility to apply this technique in biomechanics is discussed