SU5254A1 - Device for measuring temperatures with electric thermometers - Google Patents

Device for measuring temperatures with electric thermometers

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Publication number
SU5254A1
SU5254A1 SU13128A SU13128A SU5254A1 SU 5254 A1 SU5254 A1 SU 5254A1 SU 13128 A SU13128 A SU 13128A SU 13128 A SU13128 A SU 13128A SU 5254 A1 SU5254 A1 SU 5254A1
Authority
SU
USSR - Soviet Union
Prior art keywords
resistance
measuring temperatures
thermometer
electric thermometers
thermometers
Prior art date
Application number
SU13128A
Other languages
Russian (ru)
Inventor
А.М. Калинин
Г.П. Кульбуш
Original Assignee
А.М. Калинин
Г.П. Кульбуш
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by А.М. Калинин, Г.П. Кульбуш filed Critical А.М. Калинин
Priority to SU13128A priority Critical patent/SU5254A1/en
Application granted granted Critical
Publication of SU5254A1 publication Critical patent/SU5254A1/en

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Description

На фиг. 1 и 2 чертежа изображены схемы предлагаемого устройства . Дл  измерени  температур посредством электрического термометра примен етс  схема мостика Витстона согласно схемы по фиг. 1. Вз ты следующие сопротивлени  четырех ветвей мостика: AC Ri, CKF сопротивлению С/С-{-сопротивл. /Cf + сопротивл. KF, FLTD сопротивл. FL + сопротивл. LTD и DA R. К точкам Л и / приложена электродвижуща  сила батареи Е; между точками С и D включен нуль-аппарат N, а между К VI L реостат В (круглый реохорд KFL) со скольз щим контактом F с центром вращени  в точке В реостата. Электрический термометр Т (фиг. 1), состо щий из металлической спирали, приключен к точкам D и L. Сила тока в нуль-аппарате N равна О, если Rs + KF FL + LTD -Ry получаетс : При + KF ., FL + LTD RS + KF FL + LTD: откуда LTD RS- KF-FL . . (2) Совмеща  точку F с К и полага , что при температуре 0°С сопротивление термометра 7 . сопротивл . LTD, если в первом приближении отбросить сопротивление соединительных проводов, которое может быть сделано ничтожно малым по сравнению с сопротивлением термометра Т, получаетс : R R,(L . . . . (3) Полага , что при температуре / С, сопротивление термометра Rci(.f), где а-температурный коэффициент материала спирали термометра сопротивлени , из (2) и (3) получаетс : / R, + KL+KF- R, + 2KF или R(+., + 2KF, откуда . R, t -..KF, T.-e. температура среды, в которой находитс  термометр сопротивлени , пропорциональна сопротивлению выведенной из ветви KLTD части реостата (круглого реохорда). Скрепл   неподвижно с осью вращени  движка реостата (круглого реохорда KFL диск с нанесенной на него в градусах Ц. щкалой , нуль которой совпадает с неподвижной чертой на доске реостата при совмещении точки F с К, можноFIG. 1 and 2 of the drawing shows the scheme of the device. To measure temperatures using an electrical thermometer, a Whitstone bridge circuit is used according to the circuit of FIG. 1. The following resistances of the four branches of the bridge are taken: AC Ri, CKF to resistance C / C - {- resistance. / Cf + resist. KF, FLTD resist. FL + resistance LTD and DA R. Electromotive force of battery E is applied to points L and /; between the points C and D there is a null-device N, and between K VI L a rheostat B (round KFL resistor) with a sliding contact F with a center of rotation at point B of the rheostat. An electrical thermometer T (Fig. 1), consisting of a metal spiral, is adventurous to points D and L. The current in the null apparatus N is equal to O if Rs + KF FL + LTD-Ry is obtained: At + KF., FL + LTD RS + KF FL + LTD: from where LTD RS-KF-FL. . (2) Combining the point F with K and believed that at a temperature of 0 ° C the resistance of the thermometer 7. resist LTD, by discarding the resistance of the connecting wires in the first approximation, which can be made negligible compared to the resistance of the thermometer T, we get: RR, (L... (3) Assuming that at a temperature / C, the resistance of the thermometer Rci (. f), where a is the temperature coefficient of the material of the resistance thermometer helix, from (2) and (3) we get: / R, + KL + KF- R, + 2KF or R (+., + 2KF, from which R, t - ..KF, T.-e. The temperature of the medium in which the resistance thermometer is located is proportional to the resistance of the part of the rheostat extracted from the KLTD branch (round p ohorda). fastener fixedly to the engine rotational axis rheostat (KFL Slidewire circular disc applied thereto in degrees C. schkaloy, which coincides with the zero line on the fixed resistors board when combining point F to K, can be

SU13128A 1926-12-23 1926-12-23 Device for measuring temperatures with electric thermometers SU5254A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU13128A SU5254A1 (en) 1926-12-23 1926-12-23 Device for measuring temperatures with electric thermometers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU13128A SU5254A1 (en) 1926-12-23 1926-12-23 Device for measuring temperatures with electric thermometers

Publications (1)

Publication Number Publication Date
SU5254A1 true SU5254A1 (en) 1928-04-30

Family

ID=48329214

Family Applications (1)

Application Number Title Priority Date Filing Date
SU13128A SU5254A1 (en) 1926-12-23 1926-12-23 Device for measuring temperatures with electric thermometers

Country Status (1)

Country Link
SU (1) SU5254A1 (en)

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