High-precision measuring technique for strain-gage transducers High-precision measuring technique for strain-gage transducers | HBM

The signals of strain gage transducers are very small. In consequence, error signals can even exceed the measuring signal amplitudes and therefore must be suppressed by sophisticated measuring circuits.

The paper discusses the problems and solutions for high resolution, high stability and efficient suppression and damping of error signals and unwanted dynamic signals.

It describes the absolute physical limits for the resolution of strain gage transducer signals and how carrier frequency technique can get very close to the boundary of theoretically achievable maximum resolution.

Very high gain stability can be achieved with very precise inductive dividers as reference signal sources and with auto-calibration cycles. Realisations of the philosophy are shown for high-precision static measuring units and for universal broadband amplifier systems.

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