SU890282A2

SU890282A2 - Specimen holder for measuring material magnetic parameters

Info

Publication number: SU890282A2
Application number: SU792855144A
Authority: SU
Inventors: Александр Федорович Кугаевский; Анатолий Бертусович Лукашенок
Original assignee: Рижский Краснознаменный Институт Инженеров Гражданской Авиации Им.Ленинского Комсомола
Priority date: 1979-12-19
Filing date: 1979-12-19
Publication date: 1981-12-15

Description

Изобретение относится к электроизмерительной технике.The invention relates to electrical engineering.

По основному авт.св.№343232 известен держатель образцов для измерения параметров магнитных материалов ,. содержащий короткозамкнутый кон- ⁵тейнер образцов, выполненный из наружного цилиндра и внутреннего электрода II] . .According to the main author St. No. 343232, a sample holder is known for measuring the parameters of magnetic materials,. containing a short-circuited sample container ⁵ made of an outer cylinder and an inner electrode II]. .

Недостаток устройства заключается в его невысокой точности. ¹⁰ The disadvantage of this device is its low accuracy. ¹⁰

Целью изобретения является повышений точности измерений параметров материалов.The aim of the invention is to increase the accuracy of measurements of material parameters.

Поставленная цель достигается тем, что держатель образцов, содержащий ¹⁵короткозамкнутый коаксиальный контейнер, состоящий из наружного цилиндра и внутреннего электрода, снабжен мостом переменного тока и двумл контактными гнездами, расположенными на внутреннем электроде короткозамкнутого коаксиального контейнера, При этом наружный цилиндр контей2 нера подключен к диагонали питания моста, внутренний электрод контейнера посредством одного контактного гнезда подсоединен к смежному плечу моста, а посредством второго контактного гнезда - к измерительной диагонали моста.This goal is achieved in that the sample holder containing a ¹⁵ short-circuited coaxial container, consisting of an outer cylinder and an internal electrode, is equipped with an AC bridge and two-pin sockets located on the inner electrode of the short-circuited coaxial container. bridge, the inner electrode of the container through one contact socket is connected to an adjacent shoulder of the bridge, and through the second contact socket and - to the measuring diagonal of the bridge.

На чертеже показана схема держателя.The drawing shows a diagram of the holder.

Держатель образцов содержит короткозамкнутый коаксиальный контейнер, состоящий из наружного цилиндра 1 и внутреннего электрода 2. На внутреннем электроде 2 находятся два контактных гнезда 3 и 4, первое гнездо 3 расположено на свободном конце электрода 2, а второе гнездо 4 - на участке между первым контактным гнездом 3 и местом помещения в контейнер испытуемого образца 5.The sample holder contains a short-circuited coaxial container consisting of an outer cylinder 1 and an inner electrode 2. On the inner electrode 2 there are two contact sockets 3 and 4, the first socket 3 is located on the free end of the electrode 2, and the second socket 4 is located in the area between the first contact socket 3 and the location of the test sample 5 in the container.

Контейнер подключают к мосту 6 переменного тока, имеющего в общем случае плечи сравнения, например, с об3 разцовыми мерами комплексных сопротивлений Z_o, , Z₀₂ и Ζ₀₃, высокочастотный гёнератор 7 и измеритель 8, как правило, - прибор типа вольтметра. При этом первое контактное. _sгнездо 3 электрически последовательно соединяют с элементом смежного плеча сравнения моста, в частности, с образцовой мерой Ζ_σ), а второе контактное гнездо 4 - .с измерителем 8. ю В результате участок A-В контейнера между короткозамкнутым концом и вторым контактным гнездом 4 составляет плечо измерения моста с комплексным сопротивлением Ζ_χ, в то время и как смежное плечо сравнения моста включает участок между контактными· гнездами 3 и 4 внутреннего электрода 2 и образцовую меру Ζ₀₎.The container is connected to an AC bridge 6, which generally has shoulders of comparison, for example, with 3 model measures of complex resistances Z _o ,, Z ₀₂ and Ζ ₀₃ , a high-frequency generator 7 and meter 8, as a rule, a voltmeter type device. In this case, the first contact. _s socket 3 is electrically connected in series with an element of the adjacent comparison shoulder of the bridge, in particular, with exemplary measure Ζ _σ) , and the second contact socket 4 is connected with a meter 8. makes up the shoulder for measuring the bridge with complex resistance Ζ _χ , while the adjacent shoulder for comparing the bridge includes the section between the contact sockets 3 and 4 of the inner electrode 2 and the exemplary measure Ζ ₀₎ .

Работа держателя образцов заключает-зд ся в следующем.The work of the sample holder consists in the following.

Первоначально, когда контейнер пуст, изменяя сопротивления образцовых мер Ζ₀₁, Ζ₀₂ и Ζ_ο} плеч сравнения моста 6, производят его уравновешивание до наступления момента, пока электрический сигнал в измерительной диагонали, т.е. поступающий в измеритель 8, не будет равен нулю или какому наименьшему. Затем размы- jq кают электрические соединения в контактных гнездах 3 и 4, и в контейнер помещают испытуемый образец 5» нанизав его,соосно на внутренний электрод 2. После этого контейнер опять включают а электрическую схему моста 6, и по сигналу разбаланса в измерительной диагонали с помощью измерителя 8 судят об изменении (приращении) сопротивления Ζχ, характеризующем в полной мере элект ромагнитные показатели образца 5.Initially, when the container is empty, changing the resistances of the model measures Ζ ₀₁ , Ζ ₀₂ and Ζ _{ο} of the} comparison arms of the bridge 6, it is balanced until the moment when the electrical signal is in the measuring diagonal, i.e. entering meter 8 will not be zero or whichever is smallest. Then, electrical connections are disconnected jq in contact sockets 3 and 4, and a test sample 5 ”is placed in the container, having been strung coaxially on the internal electrode 2. After that, the container is again switched on and the bridge circuit 6 is turned on, and according to the imbalance signal in the measuring diagonal with Using meter 8, one can judge the change (increment) in the resistance Ζχ, which fully characterizes the electromagnetic indicators of sample 5.

Аналогичным образом измеряют электромагнитные характеристики дру гих образцов высокочастотных ферромагнетиков .всякий раз размыкая и замы- ” кая посадочные места контактных гнезд 3 и 4 при пустом и заполненном образцом контейнере.The electromagnetic characteristics of other samples of high-frequency ferromagnets are measured in a similar way. Each time, opening and closing the seats of contact sockets 3 and 4 when the container is empty and filled with the sample.

Таким образом, держатель образцов для измерения параметров магнитных материалов выгодно отличается от известных устройств, подобного назначения, так как за счет специфических конструктивных особенностей и определенного подключения к электрической схеме моста переменного тока, обеспечивается высокая точность измерения электромагнитных характеристик высокочастотных ферромагнетиков.Thus, the holder of samples for measuring the parameters of magnetic materials compares favorably with known devices of similar purpose, since due to the specific design features and the specific connection to the electrical circuit of an AC bridge, high accuracy is measured for the electromagnetic characteristics of high-frequency ferromagnets.

Claims

This invention relates to electrical measuring technology. According to the main auth. a sample holder is known for measuring the parameters of magnetic materials, comprising a short-circuited sample container of a sample made of an outer cylinder and an inner electrode II. The disadvantage of the device is its low accuracy. The aim of the invention is to improve the accuracy of measurements of parameters of materials. The goal is achieved by the fact that the sample holder containing a short-circuited coaxial container consisting of an outer cylinder and an internal electrode, slept by an AC bridge and two contact sockets, is located on the inner electrode of the short-circuited coaxial container, while the outer cylinder of the encoder is connected to the diagonal power supply of the bridge; the internal electrode of the container is connected to the adjacent bridge arm via one contact socket, and to the second contact socket measuring diagonal of the bridge. The drawing shows the scheme of the holder. The sample holder contains a short-circuited coaxial container consisting of an outer cylinder 1 and an internal electrode 2. On the internal electrode 2 there are two contact sockets 3 and 4, the first socket 3 is located at the free end of electrode 2, and the second socket t is in the area between the first the contact socket 3 and the location of the test sample 5 in the container. The container is connected to the AC bridge 6, which in general has shoulders of comparison, for example, with sample measures of complex resistance Z Zoj, high frequency nerator 7 and meter 8, as a rule, is a device of the voltmeter type. In this case, the first pin, socket 3 is electrically connected in series with the element of the adjacent arm of the bridge, in particular, with the standard measure Z, and the second socket 4 is with the meter 8. As a result, the container section A-B between the short-circuited end and the second the contact socket k constitutes the measuring bridge of the bridge with the complex resistance Z, while I, as the adjacent bridge of comparison, includes the section between the contact sockets 3 and. internal electrode 2 and a model measure Z ,. The work of the sample holder is concluded as follows. Initially, when the container is empty, by varying the resistance of the standard measures ZQP ZQJ and Zgj of shoulders, as compared to bridge 6, it is balanced before the onset of time, as the electric signal in the measuring diagonal, i.e. incoming in and measurer 8, will not be equal to zero or what is the smallest. Then, the electrical connections in the contact slots 3 and 4 are opened, and the test sample 5i is placed into the container and strung it onto the inner electrode.

2. After that, the container is again turned on in the electric circuit of bridge 6, and the signal of the imbalance in the measuring diagonal is measured by measuring meter 8 (increment of resistance Zx, characterized fully by the electromagnetic indicators of the sample 5. In a similar way Electromagnetic characteristics of other samples of high-frequency ferromagnets, all the time of opening and closing the seats of contact pins 3 and 4 with an empty and filled with specimen container. Thus, the sample holder for measuring The ditch of magnetic materials favorably differs from the known devices of similar purpose, since due to specific, design features and a certain connection to the electrical circuit of an AC bridge, high accuracy of measuring the electromagnetic characteristics of high-frequency ferromagnets is provided. .St. No. characterized in that, in order to improve the accuracy of measurements, it is equipped with an AC bridge and two contact sockets arranged on the inner electrode shorted coaxial container, the outer container cylinder is connected to a power bridge diagonal, the inner container through one electrode contact socket is connected to the adjacent arm of the bridge, and by a second contact socket - the measuring diagonal of the bridge. Sources of information taken into account in the examination 1. USSR Author's Certificate No., cl. G 01 R 33/00, 19b7.