METHOD OF FORMING STEPS OF INCREMENT OF RESISTANCE IN SIMULATOR OF SIGNALS OF SINGLE STRAIN GAUGES Russian patent published in 2024 - IPC G01R1/20 H01C10/16 

FIELD: measuring.

SUBSTANCE: invention relates to measurement equipment and is intended for the formation of a given number of discrete increments of resistance relative to the nominal resistance of the simulated resistance strain gauge during metrological studies, calibration and verification of high-speed measuring systems in automatic mode. Nominal resistance of the simulated resistance strain gauge R_n and the range of resistance increment ±ΔR are selected. Ratio is selected, which is used to calculate the possible number of steps of resistance increment k₁=m×n. Outputs of circuits of m-1 and n-1 resistors are connected in series through key elements of commutators to their outputs; voltages proportional to increments of resistances of simulator stages with pitch R₁ are formed at their outputs. Required number of steps of resistance increment k₂, which is formed by the simulator, is additionally determined. Values m and n are selected so that value k₁ is maximally close to value k₂. Determining from the ratio a=k₁-k₂, by how many stages the simulator can form compared to the required number, wherein the number of required maximum negative and maximum positive stages will be less by a/2 in relation to the value of the same stages k_1. Value of resistance of the reference resistor is calculated from the ratio R₀=R_n-ΔR-(a/2)×R₁, where R₁=(2×ΔR)/(k₂-1), value of resistance of the resistor circuit of n-1 resistors from the ratio R₂=m×R₁. Output 1+a/2 is connected to switch K1, and output m+1 to switch K2, wherein at outputs of switches generated is voltage equal to I×(R_n-ΔR), which corresponds to voltage of minimum resistance of maximum negative stage of simulator. To form the following stages, outputs of circuits of m-1 resistors and n-1 resistors are connected in series to switch K1. Formation of resistance increment steps is completed after m+n output is connected to switch K2 input, and that output of circuit of m-1 resistors is connected to input of switch K1, which provides formation of maximum positive of k₂ step of resistance increment of simulator. At that, at outputs of switches K1 and K2 voltage equal to I×(R_n+ΔR) is generated.

EFFECT: broader functional capabilities of the resistance increment steps shaper in the strain gage signals simulator, designed to generate m×n steps of increment of resistance to provide formation of any number of steps of resistance increment with minimum total number of resistors of chains of m-1 resistors and n-1 resistors.

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