SU970141A1

SU970141A1 - Device for measuring ray flows

Info

Publication number: SU970141A1
Application number: SU803210505A
Authority: SU
Inventors: Олег Аркадьевич Геращенко; Светлана Алексеевна Сажина; Николай Николаевич Базырь; Борис Михайлович Лапенко
Original assignee: Институт технической теплофизики АН УССР
Priority date: 1980-12-01
Filing date: 1980-12-01
Publication date: 1982-10-30

Description

Изобретение относитс к теплометрии и может быть использовано в системах контрол и автоматического регулировани ,The invention relates to calorimetry and can be used in control and automatic control systems.

Известно устройство дл измерени тепловых потоков, содержащее термоэлектрические датчики, нагреватели и измерительные схемы С Однако известное устройство имеет низкую точность измерени .из-за вли ни внешних факторов.A device for measuring heat fluxes containing thermoelectric sensors, heaters and measuring circuits C is known. However, the known device has a low measurement accuracy due to the influence of external factors.

Наиболее близкое к предлагаемому устройство дл измерени лучистых потоков содержит два термоэлектрических датчика теплового потока, нагреватель и измерительную схему с блоком делени и регистратором 2.The closest to the proposed device for measuring radiant flux contains two thermoelectric heat flux sensors, a heater and a measuring circuit with a dividing unit and a recorder 2.

Недостатком этого устройства вл етс низка точность измерени в услови х неравномерного теплового потока ,A disadvantage of this device is the low measurement accuracy under conditions of uneven heat flux,

Цель изобретени - повышение точности измерени лучистых потоков.The purpose of the invention is to improve the accuracy of measurement of radiant fluxes.

Поставленна цель достигаетс тем, что в устройство введены блоки суммировани и вычитани , к входам которых подключены датчики теплового потока , установленные один за другим последовательно по направлению.измер емого потока, с размещенным междуThe goal is achieved by adding summation and subtraction blocks to the device, to which inputs heat flow sensors are installed, one after the other sequentially in the direction of the measured flow, placed between

ними нагревателем, а выходы блоков суммировани и вычитани соединены .с входами блока делени , выход которого подключен к регистратору.with these heaters, and the outputs of the summation and subtraction units are connected to the inputs of the division unit, the output of which is connected to the recorder.

На чертеже схематически изображено устройство дл измерени лучистых потоков.The drawing schematically shows a device for measuring radiant fluxes.

Устройство дл измерени лучистых потоков содержит два одинаковых тер10 моэлектрических датчика 1 и 2 теплового потока, Между датчиками размещен наход щейс |С ними в тепловом контакте нагреватель 3, Датчики и нагреватель заключены в обойму 4, Вы15 ходы датчиков подключены к вход щим в состав схемы 5 измерени блокам 6 и 7 суммировани и вычитани , выходы которых в свою Ьчередь подключены к блоку 8 делени . Выход последнего The device for measuring radiant flux contains two identical thermoelectric sensors 1 and 2 of the heat flux. Heater 3 located in the thermal contact is placed between the sensors, the sensors and the heater are enclosed in the holder 4, the outputs 15 of the sensors are connected to the circuit 5 measurements of blocks 6 and 7 of summation and subtraction, the outputs of which, in turn, are connected to block 8 of division. Output last

20 соединен с регистратором 9.20 is connected to the recorder 9.

Устройство дл измерени лучистых потоков 15аботает следующим образом.A device for measuring radiant flux 15 works as follows.

Claims

Heater 3 is supplied with a constant fixed electrical voltage, which is converted into heat flux penetrating sensors 1 and 2. At the same time, both sensors penetrate the heat flux perceived by the receiving platform of the working receiver. At the outputs of the sensors, EDY appears. For sensor 1, its value is f 4 s e1 «I 42 k42, and for sensor 2 the output signal is (4) 4% H (4 DU where are signals that are not indicated by sensors 1 and 2; ( ji is the heat flux from the heater; (—the heat flux, perceived by the receiving pad of the working receiver; the coefficients η {of the gauges 1 and 2, at 4ejwK sKx-s | t; f, - the influencing factor (pressure surroundings, temperature, degree of absorption, etc.). The signals C and Cd simultaneously arrive at the inputs of blocks 6 and 7 of the summation and subtraction. At the output of the summation block Wi b bK (i%) At the output of the subtraction unit, -,.) From the output of BLACK 6, the signal is fed to the input of the numerator, and from the output of LOCK 7 to the input of the denominator of the Sjiejie block, to the output of which - HH It is obvious that the signal received at the output of dividing unit 8 is the sought quantity Qn. The measurement process maintains the independence of the measurement results from the error introduced by influencing factors, and in addition, the influence of the error due to the unevenness of the measured flow in the measurement plane. Claims An apparatus for measuring radiant fluxes, comprising two thermoelectric heat flux sensors, a heater and a measuring circuit with a dividing unit and a recorder, characterized in that, in order to improve measurement accuracy, summation and subtraction blocks are introduced into the device, the sensors of which are connected to the inputs heat flux, installed one after another sequentially in the direction of the measured flux, with a heater placed between them, and the outputs of the summation and subtraction blocks are connected to the input E dividing unit, whose output is connected to the logger. Sources of information taken into account in the examination 1. O. A. Gerashchenko et al. Thermal and Temperature Measurements. Kiev, Naukova Dumka, 1965, p. 259-261.

2. Author's certificate of the USSR H 720320, cl. G 01 K 15/00, 1977 (prototype).