| 摘要 |
instrumentation, measurement technology. SUBSTANCE: electrical bridge incorporates four resistive converters 1-4, Resistive converter 1 is primary instrument and resistive converters 2, 3, 4 have constant parameters. Resistive converter 1 forms jointly with resistive converter 2 parameter- dependent voltage divider 7. Power supply source 5 is made in the form of current generator. Resistive converters 3 and 4 form passive voltage divider 8. Differential amplifier 6 is connected to measurement diagonal of electrical bridge formed by center points of voltage dividers 7, 8. Buffer amplifier 9 ensuring high-resistance potential decoupling of power supply circuits of both voltage dividers is placed in parallel to voltage divider 7. That is why voltage divider 7 will be fed from current generator 5 and voltage divider 8 is fed with voltage formed across output of buffer amplifier 9. EFFECT: linearization of conversion function of all electrical bridges having only one working arm with any primary converter of resistive type. 2 cl, 5 dwg |
