Digitalised evaluation circuit for resistance bridge - integrates signal across diagonal before and after polarity reversal obtained via further parallel resistance (NL 24.6.80)

摘要: The evaluation circuit periodically integrates the signal across measuring diagonal over a given time period. Subsequent to this integration further resistance (12) is connected in parallel with bridge resistances (1-4) so that polarity of reversed. new then integrated as before. Pref. integrator (10, 11) for zero comparator (16), output which controls switch (13) connecting (1-4). Each may comprise an expansion strip, positioned same locality and made from corresponding material.