SU779954A1

SU779954A1 - Magnetic field induction gradient measuring device

Info

Publication number: SU779954A1
Application number: SU782695097A
Authority: SU
Inventors: Исаак Павлович Гринберг; Семен Григорьевич Мдивани; Владимир Алексеевич Штец; Евгений Андреевич Шуляковский
Original assignee: Предприятие П/Я М-5988
Priority date: 1978-12-11
Filing date: 1978-12-11
Publication date: 1980-11-15

Description

Изобретение относится к,области измерительной техники, а именно, к устройствам для измерения индукции магнитных полей. Градиент индукции магнитного поля определяют путем вы- 5 числения отношения разности двух напряжений Холла, измеренных в двух различных точках магнитного поля к расстоянию между этими точками.The invention relates to the field of measuring technology, namely, devices for measuring the induction of magnetic fields. The gradient of the magnetic field induction is determined by calculating the ratio of the difference between the two Hall voltages measured at two different points of the magnetic field to the distance between these points.

Известны устройства, измеряющие градиент индукции магнитного поля, использующие преобразователь Холла [11.Known devices that measure the gradient of the induction of a magnetic field using a Hall transducer [11.

Холловские электроды через изолирующие трансформаторы подключены к 15 :Двух( последовательно соединенным делителям. Это устройство обеспечивает относительно высокую точность измерения градиента.Hall electrodes are connected through insulating transformers to 15: Two (series-connected dividers. This device provides a relatively high accuracy of gradient measurement.

Недостатками подобного устройства 20 являются: зависимость выходного разностного сигнала от индукции магнитного поля, вызванная неиндентичностью характеристик и условий работы двух половин преобразователя, соответству-25 щих присоединенным к ним двум парам холловских электродов, а также применение преобразователя Холла особой конструкции (две пары холловских электродов) . 3QThe disadvantages of such a device 20 are: the dependence of the output difference signal on the magnetic field induction, caused by the non-identical characteristics and operating conditions of the two halves of the transducer, corresponding to two pairs of Hall electrodes attached to them, as well as the use of a Hall transducer of a special design (two pairs of Hall electrodes) . 3Q

Цель изобретения - повышение точности измерения, за счет устранения зависимости выходного сигнала от индукции магнитного поля.The purpose of the invention is to improve the measurement accuracy, by eliminating the dependence of the output signal on the induction of the magnetic field.

Эта цель достигается тем, что устройство, содержащее преобразователь Холла, источник напряжения и измеритель напряжения, снабжено сумматором, а источник напряжения рыполнен двухполярным со средней нулевой точкой и подключен к токовым электродам преобразователя Холла, холловские электроды которого подключены к входу сумматора, выход которого через измеритель напряжения соединен со средней ' нулевой точкой источника напряжения.This goal is achieved in that the device containing the Hall converter, a voltage source and a voltage meter is equipped with an adder, and the voltage source is bipolar with an average zero point and connected to the current electrodes of the Hall converter, the Hall electrodes of which are connected to the input of the adder, the output of which is through the meter voltage is connected to the mid 'zero point of the voltage source.

На чертеже представлена схема устройства .The drawing shows a diagram of the device.

Устройство содержит преобразователь Холла 1, двухполярный 'источник напряжения 2 со средней нулевой точкой, сумматор 3, измеритель выходного сигнала 4.The device comprises a Hall converter 1, a bipolar voltage source 2 with an average zero point, an adder 3, an output signal meter 4.

Работает устройство следующим образом.The device operates as follows.

При помещении преобразователя Холла 1 в неоднородное магнитное поле, на его холловских электродах относительно нулевой точки двухполярного источ779954When placing the Hall 1 transducer in an inhomogeneous magnetic field, on its Hall electrodes relative to the zero point of the bipolar source779954

Т(ика напряжения 2 появляются различные по величине и знаку холловские потенциалы, соответствующие индукциям магнитного поля в двух точках, отстоящих друг от друга на расстоянии 1 мм.T (voltage peak 2), Hall potentials of different magnitude and sign appear corresponding to magnetic field inductions at two points spaced 1 mm apart.

( +U^ и -11) . Эти потенциалы поступают с на вход сумматора 3, который их алгебраически суммирует. В результате суммирования на входе иэмеритела. 4 получаем электрический сигнал, равный (+U₄) + (-U₂) = и₄-и₂. ₁₀ (+ U ^ and -11). These potentials come from the input of adder 3, which sums them algebraically. As a result of summation at the input of the meter. 4 we get an electrical signal equal to (+ U ₄ ) + (-U ₂ ) = and _4- and ₂ . ₁₀

Так как расстояние между холловскими электродами равно 1 мм, то операцию деления производить не следует и следовательно, на выходе сумматора 3 получается электрический сигнал, пропорциональный отношению разности двух 15 холловских потенциалов к расстоянию между холловскими электродами и соответствующий измеряемой величине градиента индукции магнитного поля.Since the distance between the Hall electrodes is 1 mm, the division operation should not be performed, and therefore, an electric signal is obtained at the output of the adder 3, which is proportional to the ratio of the difference of the two 15 Hall potentials to the distance between the Hall electrodes and corresponding to the measured magnetic field gradient.

Claims

The invention relates to measurement-measuring equipment, namely, devices for measuring magnetic fields. The induction gradient of the magnetic field is determined by calculating the ratio of the difference between the doubles of the Hall stresses measured at two different points of the magnetic field to the distance between these points. Devices are known that measure the induction gradient of a magnetic field using a Hall transducer. Hall electrodes are connected to two successively connected dividers through insulating transformers. This device provides a relatively high accuracy measurement of any gradient. The disadvantages of this device are: the dependence of the output difference signal on the magnetic field induction, caused by the non-indentity of the characteristics and operating conditions of the two halves of the converter, corresponding to two pairs of Hall electrodes attached to them, and the use of a Hall converter of a special design (two pairs of Hall electrodes) trodov). The purpose of the invention is to improve the measurement accuracy by eliminating the dependence of the output signal on the magnetic field induction. This goal is achieved by the fact that a device containing a Hall transducer, a voltage source and a voltage meter is equipped with an adder and a voltage source (made two-pole with an average zero point and connected to current electrodes of a Hall transducer, the Hall electrodes of which are connected to the adder input the output of which is connected to the mid zero point of the voltage source through a voltage meter. The drawing shows a diagram of the device. The device contains a Hall converter 1, a two-pole source voltage nickname 2 with mid zero point, adder 3, output signal meter 4. The device operates as follows: When a Hall converter 1 is placed in a non-uniform magnetic field, at its Hall electrodes relative to the zero point of a two-polar voltage source 2 in magnitude and sign, the Hall potentials correspond to magnetic field inductions at two points, spaced 1 mm from each other. (and -f. These potentials are fed to the input of the adder 3, which sums them algebraically. As a result of the summation at the input of the meter. 4 we get an electrical signal equal to () + (-and). Since the distance between the Hall electrodes is 1 mm then the division operation should not be performed and, therefore, the output of the adder 3 produces an electrical signal proportional to the ratio of the difference of two Hall potentials to the distance between the Hall electrodes and corresponding to the measured value of the magnetic induction gradient The invention The device for measuring the induction gradient of a magnetic field containing a Hall transducer, a voltage source, a voltage meter, characterized in that, in order to improve the measurement accuracy, it is equipped with an adder, and the voltage source is bipolar with an average zero point, and connected to the current electrodes of the Hall transducer, the Hall electrodes of which are connected to the input of the adder, the output of which is connected to the zero point of the voltage source through a voltage meter. Sources of information taken into account in the examination 1. Jowa state CoCEege Journal of Science, 1958, V32, 3, p346-469.