SIMULATOR OF OUTPUT SIGNALS OF STRAIN GAGES

摘要

FIELD: measuring equipment.;SUBSTANCE: invention relates to the metrology equipment for checking and attestation of secondary strain gauges. Simulator of output signals of resistive strain gauges consists of measuring bridge 1, formed by resistors 2–5, linearizing resistor 6, differential amplifier 7, ADC 8, microprocessor 9 and DAC 10. Outputs of one diagonal of measuring bridge 1 are connected to power supply U_P, and outputs of the other diagonal are informative outputs of simulator and are connected to inputs of differential amplifier 7. Output of differential amplifier 7 is connected to input ADC 8, output of ADC 8 is connected to input of microprocessor 9, and output of microprocessor 9 is connected to input of DAC 10. Output of DAC 10 is connected to the first output of linearizing resistor 6, the second output of which is connected to one of information outputs of simulator. Reference voltage source ADC is used to supply power of measuring bridge U_P, and microprocessor, ADC and DAC are built-in components of microcontroller 11.;EFFECT: high accuracy of setting the imbalance of the measuring bridge by providing temperature and time stability of the imbalance meter of the measuring bridge.;1 cl, 1 dwg