SU664130A1

SU664130A1 - Milliteslameter

Info

Publication number: SU664130A1
Application number: SU772525310A
Authority: SU
Inventors: Исаак Павлович Гринберг; Евгений Андреевич Шуляковский; Алексей Петрович Щелкин
Original assignee: Предприятие П/Я М-5988
Priority date: 1977-09-20
Filing date: 1977-09-20
Publication date: 1979-05-25

Description

(54) МИЛЛИТЕСЛАМЕТР(54) MILLITESLAMETER

1one

Изобретение относитс к области магнитных измерений и может быть использовано дл измерени магнитной индукции слабых посто нных полей в диапазоне 10 - 5-10 Т.The invention relates to the field of magnetic measurements and can be used to measure the magnetic induction of weak constant fields in the range of 10 - 5-10 T.

Известны устройства, содержаод1е преобразователь Холла, источник тока усилитель и индикатор 1,The known device contains a Hall converter, a current source, an amplifier, and an indicator 1,

Недостатком ми литесламетра вл етс больша .зависимость показаний от температуры в месте измерени .The disadvantage of a litheslametr is the large dependence of the readings on the temperature at the measurement site.

Известен миллитесламетр, содержаЮий датчик Холла, стабилизированный источник переменного напр жени , прнижакнфий трансформатор, выпр митель и милливольтметр {2..A milliliter meter is known, containing a Hall sensor, a stabilized alternating voltage source, a transformer, a rectifier and a millivoltmeter {2 ..

Недостатком известного мйллитесламетра . вл етс больша дополнительна температурна погрешность, значение которой определ ете ,главным образом температурным коэффициентом подвижности носителей зар да материала пластины преобразовател Холла.The disadvantage of the famous millitaslametra. There is a large additional temperature error, the value of which is determined, mainly by the temperature coefficient of mobility of the charge carriers of the Hall plate material of the converter.

Цель иэ1Обретени - повышение точйОстн измерени .The purpose of the 1D is to increase measurement points.

Это достигаетс тем, что в устройво , содержащее последовательно соединенные источник напр жени , понижающий трансформатор и преобрйзователь Холла, а также первый выпр митель , вход которого соединен с холловкими электродами преобразовател Холла , и милливольтметр , своим входом соединенный с выходом первого выпр мител , введены полевой транзистор, второй выпр митель и резистор, при этом заТврр и исток полевого транзистора соединены через второй выпр митель с резистром, включенным последовательно с первичной обмоткой понижающего трансформатсра, а полевой транзистор включен последовательно с милливольтметром.This is achieved in that a device containing a series-connected voltage source, a step-down transformer and a Hall converter, as well as the first rectifier, whose input is connected to the Hall electrodes of the Hall converter, and a millivoltmeter, connected by its input to the output of the first rectifier, are the transistor, the second rectifier and the resistor, while the Zvvrr and the source of the field-effect transistor are connected via a second rectifier with a resistor connected in series with the primary winding a transformer, and the field effect transistor is connected in series with a millivoltmeter.

На чертеже изображена структурна схема устройства. .The drawing shows a block diagram of the device. .

Устройство содержит преобразователь 1 Холла, источник 2 напр жени , понижающий трансформатор 3, первый выпр митель 4, милливольтметр 5, резистор 6, второй выпр митель 7 и полевой транзистор 8.The device comprises a Hall converter 1, a voltage source 2, a step-down transformer 3, a first rectifier 4, a millivolt meter 5, a resistor 6, a second rectifier 7, and a field effect transistor 8.

Устройство работает следующим образом.The device works as follows.

Claims

When the ambient temperature changes, the sensitivity of Hall converter 1 changes (proportional to the change in the charge carrier mobility of the plate material). At the same time, the resistance of the heater plate changes, resulting in a proportional change in the current in the secondary and perrichnaya windings of the transformer 3, which in turn causes an increment stress resis-. torus 6. The voltage is rectified with the help of rectifier 7 and is applied to the gate of the field-effect transistor 8, changing its resistance and, consequently, the current through the million meter 5 so as to compensate for the change in the sensitivity of the Hall 1 converter. The advantage of the proposed milliliter meter is that the role of a thermistor (temperature sensor), which is required to compensate for additional temperature error, is performed by the ceiM converter of the Hall / continuing to operate in the given voltage mode. This makes it possible to reduce the dimensions of the measuring probe (as compared with those devices in which the thermistor is located in immediate proximity to the Hall transducer) or to improve the accuracy of compensation for additional temperature errors compared to those devices in which the thermistor and the Hall transducer are: spaced,. -. Claims of the invention Millitesl etr containing a series-connected voltage source, a step-down transformer and a Hall transducer, as well as the first rectifier, whose input is connected to Hall electrodes of the Hall transform, and a millivoltmeter connected to the output of the first rectifier, from which Sch and with the fact that, in order to improve the measurement accuracy, a field-effect transistor, a second rectifier and a resistor are inserted into it, while the gate and the source of the field-effect transistor are connected through a second rectifier to A capacitor connected in series with the primary winding of a step-down transformer, and a field-effect transistor connected in series with a millivoltmeter. . , Sources of information taken into account in the examination of l.OustanC.N. A Nag-W-Effect magnetometer for auger Magnetic Fied, J.SeiiEut Jnstrum., 1967, 44, 9.

2. USSR author's certificate No. 381894, cl. G 01 R 33/06, 15.11.71 ..