SU470767A1 - Bridge measuring circuit for inductance measurements - Google Patents

Bridge measuring circuit for inductance measurements

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Publication number
SU470767A1
SU470767A1 SU1910766A SU1910766A SU470767A1 SU 470767 A1 SU470767 A1 SU 470767A1 SU 1910766 A SU1910766 A SU 1910766A SU 1910766 A SU1910766 A SU 1910766A SU 470767 A1 SU470767 A1 SU 470767A1
Authority
SU
USSR - Soviet Union
Prior art keywords
measuring circuit
inductance
bridge measuring
inductance measurements
measure
Prior art date
Application number
SU1910766A
Other languages
Russian (ru)
Inventor
Нина Васильевна Левицкая
Original Assignee
Предприятие П/Я Г-4128
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Publication date
Application filed by Предприятие П/Я Г-4128 filed Critical Предприятие П/Я Г-4128
Priority to SU1910766A priority Critical patent/SU470767A1/en
Application granted granted Critical
Publication of SU470767A1 publication Critical patent/SU470767A1/en

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Description

1one

Изобретение относитс  к области приборостроени  и может быть использовано в измерительной технике при измерении индуктивности мостовыми методами, в том числе и малой индуктивности с магнитопроводом, подмагничиваемым посто нным током.The invention relates to the field of instrumentation and can be used in measuring equipment for measuring inductance by bridge methods, including small inductance with a magnetic circuit, which is magnetised by direct current.

Известна мостова  измерительна  цепь с индуктивно св занными плечами дл  измерени  параметров комплексных сопротивлений, например, параметров катушек индуктивности по последовательной схеме замещени , в которой последовательно с образцовой мерой включен источник э.д.с. регулируемой пропорционально току, протекающему через образцовую меру.A known pavement measuring circuit with inductively coupled arms for measuring parameters of complex resistances, for example, parameters of inductors by a sequential replacement circuit, in which the emf source is connected in series with the reference measure. adjustable in proportion to the current flowing through the model measure.

В качестве источника э.д.с. использован усилитель , выход которого включен через трансформатор напр жени  с регулируемым коэффициентом трансформации.As a source of emf. an amplifier is used, the output of which is connected via a voltage transformer with an adjustable transformation ratio.

Недостатком известной измерительной цепи  вл етс  плоха  сходимость в процессе уравновещивани  моста, низка  точность измерений и сложность измерительной цепи.A disadvantage of the known measuring circuit is the poor convergence in the process of balancing the bridge, low measurement accuracy and complexity of the measuring circuit.

Целью изобретени   вл етс  улучшение сходимости в процессе уравновешивани  моста , повышение точности измерений и упрощение измерительной цепи.The aim of the invention is to improve the convergence in the process of balancing the bridge, improving the measurement accuracy and simplifying the measuring circuit.

Это достигаетс  за счет того, что в предлагаемой измерительной цепи измер ема  индуктивность включена последовательно с пер2This is achieved due to the fact that in the proposed measuring circuit the measurable inductance is connected in series with

вичной обмоткой трансформатора и образцовой мерой, выполненной в виде меры переменной взаимной индуктивности, включенной по трехточечной схеме.the primary winding of the transformer and the exemplary measure, made in the form of a measure of the variable mutual inductance included in the three-point scheme.

На чертеже показана образцова  мера 1 взаимной индуктивности М, котора  включена последовательно - встречно с измер емой индуктивностью 2. Последовательно с ними включен источник 3 (э.д.с., пропорциональнойThe drawing shows an exemplary measure 1 of mutual inductance M, which is connected in series - opposite to measured inductance 2. Source 3 in series with them (emf proportional to

току, протекающему через измер емое сопротивление 2, образцовую меру 1, и регулируетс . Измер ема  индуктивность имеет индуктивное сопротивление LX и активное сопротивление ГхВ качестве образцовой меры 1 использован магазин взаимной индуктивности, включенный по трехточечной схеме.the current flowing through the measured resistance 2 is a reference measure 1 and is adjusted. Measured inductance has inductive resistance LX and active resistance ГхВ as a model measure 1, a mutual inductance shop is used, connected in a three-point scheme.

В качестве источника 3 э.д.с. использован трансформатор тока с коэффициентом трансформации Кт, первична  обмотка которого включена последовательно с первичной обмоткой образцовой меры, а вторична  обмотка нагружена на резистор 4, обладающий сопротивлением г, с которого снимаетс  регулируемое напр жение и включаетс  последовательно с образцовой мерой 1 и измер емой индуктивностью 2. Питаетс  цепь от внещнего источника 5. Момент равновеси  определ етс  по нулевому индикатору 6, включенному между регулируемым резистором 4 и образцовойAs a source 3 emf. A current transformer with a transformation ratio Kt is used, the primary winding of which is connected in series with the primary winding of an exemplary measure, and the secondary winding is loaded on a resistor 4 having a resistance r from which the adjustable voltage is removed and connected in series with the reference measure 1 and the measured inductance 2. The circuit is powered from an external source 5. The moment of equilibrium is determined by the zero indicator 6 connected between adjustable resistor 4 and the reference

SU1910766A 1973-04-18 1973-04-18 Bridge measuring circuit for inductance measurements SU470767A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU1910766A SU470767A1 (en) 1973-04-18 1973-04-18 Bridge measuring circuit for inductance measurements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU1910766A SU470767A1 (en) 1973-04-18 1973-04-18 Bridge measuring circuit for inductance measurements

Publications (1)

Publication Number Publication Date
SU470767A1 true SU470767A1 (en) 1975-05-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
SU1910766A SU470767A1 (en) 1973-04-18 1973-04-18 Bridge measuring circuit for inductance measurements

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SU (1) SU470767A1 (en)

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