SU830149A2

SU830149A2 - Sensor for discrete measuring and indicating of cryogenic temperatures

Info

Publication number: SU830149A2
Application number: SU792795253A
Authority: SU
Inventors: Станислав Аронович Бобров; Вадим Антонович Павлюк; Виталий Ипполитович Заборовский; Борис Павлович Котрубенко; Анатолий Матусович Иойшер
Original assignee: Физико-Технический Институт Низкихтемператур Ah Украинской Ccp; Кишиневский Научно-Исследовательскийинститут Электроприборостроения
Priority date: 1979-07-09
Filing date: 1979-07-09
Publication date: 1981-05-15

Description

(54) ДАТЧИК ДЛЯ ДИСКРЕТНОГО ИЗМЕРЕНИЯ И ИНДИКАЦИИ КРИОГЕННЫХ ТЕМПЕРАТУР(54) SENSOR FOR DISCRETE MEASUREMENT AND INDICATION OF CRYOGENIC TEMPERATURES

II

Изобретение относитс к термометрии и может быть использовано в датчиках температуры при измерении криогенных температур .The invention relates to thermometry and can be used in temperature sensors for measuring cryogenic temperatures.

По основному авт. св. № 342082 известен датчик дл дискретного измерени и индикации криогенных температур, содержащий чувствительный элемент с выводами, который выполнен в виде набора териометров сопротивлени из различных сверхпроводников первого рода. При измерении температуры сверхпроводники поочередно переход т либо в сверхпровод щее, либо в резистивное состо ние, что регистрируетс измерительной схемой 1.According to the main author. St. No. 342082 is a sensor for discrete measurement and indication of cryogenic temperatures, containing a sensing element with leads, which is designed as a set of resistance thermometers from various type I superconductors. When measuring the temperature, the superconductors alternately switch to either the superconducting or the resistive state, which is recorded by the measuring circuit 1.

Недостатком известного датчика вл етс то, что измерение температуры производитс только в дискретных точках, интервал между которыми определ етс материалом набора сверхпроводников, в св зи с чем снижаетс точность измерени температуры в промежуточных точках, так как ее определение проводитс с использованием экстрапол ции .A disadvantage of the known sensor is that temperature measurement is made only at discrete points, the interval between which is determined by the material of the set of superconductors, and therefore the accuracy of temperature measurement at intermediate points is reduced, since its determination is carried out using extrapolation.

Цель изобретени - повыщение точности измерени за счет возможности измерени температуры в любой точке температурного интервала, определ емого материалом набора сверхпроводников.The purpose of the invention is to increase the measurement accuracy due to the possibility of measuring the temperature at any point in the temperature range determined by the material of the set of superconductors.

Поставленна цель достигаетс тем, что в датчик введены катущка индуктивности и дополнительный регулируемый источник питани , подключенный к ней, причем чувствительный элемент размещен в катушке индуктивности .The goal is achieved by inserting an inductor and an additional regulated power supply connected to it into the sensor, with the sensing element placed in the inductor.

На чертеже приведена блок-схема датчика дл дискретного измерени и индикации криогенных температур.The drawing shows a block diagram of a sensor for discrete measurement and indication of cryogenic temperatures.

Чувствительный элемент 1 подключен к измерительной схеме 2. Катущка 3 индуктивности , в зазоре которой размещен чувствительный элемент 1, соединена с дополнительным регулируемым источником 4 питани .The sensing element 1 is connected to the measuring circuit 2. The inductor 3, in the gap of which the sensing element 1 is placed, is connected to an additional regulated power supply 4.

Датчик дл дискретного измерени и индикации криогенных температур работает следующим образом.A sensor for discrete measurement and indication of cryogenic temperatures operates as follows.

Claims

When the external temperature changes, one of the superconductors of the sensing element 1 goes into the resistive state, which is recorded by the measuring circuit

2. A constant current of varying magnitude is passed through the coil 3 of the inductance from the regulated auxiliary power supply 4. Depending on the size of the field created by the inductor 3, the other of the superconductors also goes into the resistive state. From the magnitude of the current flowing through the inductor 3, it is possible to judge the temperature not only at discrete points, but also at any intermediate point of temperature change. The principle of operation of the device is based on the dependence of the transition temperature of the superconductor on the intensity of the external field, which is described by the formula Hcr 1.74. Hcr (0) (1-), Where Hcr-strength is the field that puts the superconductor into a resistive state at temperature T; Ncr (O) is the field intensity, which converts the superconductor to the resistive state when OK; Tcr is the critical transition temperature of a superconductor with a zero external field. The proposed sensor for discrete measurement and indication of cryogenic temperatures makes it possible to measure the temperature not only at discrete points, the interval between which is determined by the material of the set of superconductors, but FJ at any intermediate point of each temperature interval, thereby increasing the measurement accuracy. The invention The sensor for discrete measurement and indication of cryogenic temperatures by author. St. No. 342082, characterized in that, in order to improve the measurement accuracy, an inductor and an additional regulated power supply connected to it are inserted into it, with the sensitive element placed in the inductor. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 342082, cl. G 01 K 7/16, 1970 (prototype).