Patent RU-2670811-C9 (RU)
Title: Measuring instrument for parameters of objects based on multi-branch bridge circuit
Inventor: PEREDELSKIJ GENNADIJ IVANOVICH
IPC: G01R17/10
Filed: 2017-08-27
Granted: 2018-11-28
Abstract: FIELD: test and measurement equipment. 
     SUBSTANCE: invention relates to instrumentation, automation and industrial electronics. In particular, it allows to determine the parameters of multi-element two-ports, sensor parameters with a multi-element substitution circuit or parameters of several parametric sensors. Object parameters meter based on the multi-branch bridge circuit contains a series-connected pulse generator with a voltage change according to the law of step functions, a bridge electrical circuit and a null indicator. New is the fact that it introduces an additional resistor, a chain of build-up, and defines these chain build-up: the type of elements in them, the number of elements of each type, their inclusion among themselves and the connection of the subsequent chain of build-up to the previous one, and finally, the number of buildup circuits is determined, an additional resistor is connected between the common terminal of the third resistor of the second branch of the bridge circuit and the inductive coil and the common terminal of the first (signal) output of the pulse generator, a single resistor of the first branch of the bridge circuit and the first resistor of the second branch, three elements from the bridge circuit available in the second branch, a third resistor, an inductive coil and an additional resistor (two resistors and one inductive coil), form a chain of build-up with the given connection of the elements to each other, the input of each chain of expansion is the free output of the resistor corresponding to the third resistor in the allocated first chain of build-up, the output of each build chain forms a common output of the existing three elements, which corresponds, in particular, to the common conclusion in the allocated first extension circuit of the third resistor, inductive coil and additional resistor, the input of the subsequent chain of build-up is connected to the output of the previous such circuit, in each extension chain the free terminal of the available inductive coil is grounded, and the free terminal of the resistor corresponding to the additional resistor in the allocated first extension circuit is connected to the common terminal of the first (signal) output of the pulse generator, a single resistor of the first branch of the bridge circuit and the first resistor of the second branch, the reduced second extension circuit includes a first resistor connected to the output of the first extension circuit, and a series-connected second resistor and inductive coil, a second terminal of the first resistor is connected to the common terminal of the latter, the free output of the second resistor is connected to the first (signal) output of the pulse generator, and the free terminal of the inductive coil is grounded, the total number of buildup circuits is n-1. 
     EFFECT: possibility of separately balancing the bridge circuit in several parameters only with adjustable resistors. 
     1 cl, 1 dwg