STRAIN-RESISTIVE SENSORS SIGNAL SIMULATORS UNIT Russian patent published in 2023 - IPC G01L1/22 

FIELD: instrumentation.

SUBSTANCE: invention is intended to create high-precision measuring equipment for measuring signals of precision strain gauge sensors. A strain-resistive sensors signal simulators unit comprises a metal stand, on which signal simulators are fixed based on a foil matrix, including four resistors and adjusting resistors connected in series with them, combined into a bridge circuit. The unit comprises one simulator with an active gain equal to zero, and at least one of the simulators with an active gain equal to 2 mV/V, with one, two or four actuator arms. The initial values of the four resistors are made with a resistance less than the nominal resistance by (1.2…1.3)% and sections of adjusting resistors of coarse and fine adjustments are connected in series to them. The values of additional resistances included in the actuator arms of three bridge circuits are determined from the expression ΔR=±K⋅ Rn⋅N, where K is the operating transmission coefficient of the bridge circuit, N=1, 2, 4 for bridges with 4, 2 and 1 actuator arms, R_H are the nominal resistances of the bridge arms. For a simulator with a transmission coefficient equal to zero, by fine adjustment of 4 arms, the following condition is met: R1=R2=R3=R4=Rn. The matrix is protected by a thin foil of the same material as the matrix through a thin layer of optically transparent glue. In the foil in the areas where the fine adjustment resistors are located in the matrix, four rectangular windows are formed for particularly fine adjustments of the actuator arms.

EFFECT: creating 4 different simulators of high accuracy, reliability and long-term stability with low values of zero drift on a single matrix.

2 cl, 7 dwg