| 摘要 |
FIELD: tool-making industry, possible use for measuring force, pressure, acceleration, etc. ^ SUBSTANCE: in accordance to the method, thermo-dependent resistance is introduced to sensor design with positive temperature resistance coefficient sign relatively to temperature resistance coefficient of already installed thermo-dependent resistance. Thermo-dependent resistance Ralpha with positive temperature resistance coefficient alphaalpha is meant to compensate for multiplicative temperature error, and thermo-dependent resistance Rbeta with negative temperature resistance coefficient alphabeta is meant to compensate for additive temperature error. Preliminary adjustment of circuit for maintaining oscillations of vibrating element under maximal working temperature is performed. Initial frequency of harmonic oscillation generator and deviation of generator frequency from nominal value of measured parameter is recorded for minimal and maximal working temperatures, as well as values of resistances R1+ and R2+ in the circuit of inverting adder under maximal working temperature. Values of temperature resistance coefficients alphaalpha and alphabeta of thermo-dependent resistances Ralpha and Rbeta respectively are determined. Required values of resistances Ralpha and Rbeta respectively are determined. Required values of thermo-dependent resistances Ralpha and Rbeta and thermo-independent resistances R1H and R2H are determined by solving systems of equations. Nominal values of thermo-dependent resistances Ralpha and Rbeta set in the sensor are adjusted to calculated value. Thermo-dependent resistance Rbeta is coupled serially with thermo-independent resistance R1H and thermo-dependent resistance Ralpha is coupled serially with thermo-independent resistance R2H in the circuit of inverting adder. ^ EFFECT: increased precision of minimization of temperature error of sensor with vibrating element under conditions of stationary temperature modes. ^ 5 dwg |
