SU815676A1 - Device for measuring resistor resistance increase because of power generated therein - Google Patents
Device for measuring resistor resistance increase because of power generated therein Download PDFInfo
- Publication number
- SU815676A1 SU815676A1 SU762344212A SU2344212A SU815676A1 SU 815676 A1 SU815676 A1 SU 815676A1 SU 762344212 A SU762344212 A SU 762344212A SU 2344212 A SU2344212 A SU 2344212A SU 815676 A1 SU815676 A1 SU 815676A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- resistor
- power generated
- measuring resistor
- resistance increase
- resistor resistance
- Prior art date
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- Measurement Of Resistance Or Impedance (AREA)
Description
(54) УСТРОЙСТВО ДЛЯ ИЗМЕРЕНИЯ ПРИРАИЩНИЯ СОПРОТИВЛЕНИЯ РЕЗИСТОРА ОТ ВЫДЕЛЯЮЩЕЙСЯ В НЕМ МОЩНОСТИ(54) DEVICE FOR MEASURING THE INCREASING RESISTANCE OF THE RESISTOR FROM DISTURBED POWER
(разцовым резистором включена катушка индуктивности.(the resistor is connected to the inductor.
На чертеже приведена блок-схема предлагаемого устройства.The drawing shows a block diagram of the proposed device.
Устройство содержит образцовый резистор 1 с сопротивлением Rj,, двухвходовой потенциометр 2 посто нного тока, источник 3 посто нного тока, регулируемый резистор 4, амперметр , 5 посто нного тока, выключатель 6, исследуемый резистор 7 с сопротивлением Rji, конденсатор Bj дополнительный регулируемый резистор 9, источник 10 переменного тока, дополнительный амперметр 11 переменного тока,, выключатель 12, катушку 13 индуктивности.The device contains an exemplary resistor 1 with resistance Rj ,, two-input potentiometer 2 direct current, source 3 constant current, adjustable resistor 4, ammeter, 5 direct current, switch 6, resistor 7 with resistance Rji, capacitor Bj additional adjustable resistor 9 , source 10 of alternating current, additional ammeter 11 of alternating current ,, switch 12, coil 13 of inductance.
Устройство работает следующим образом.The device works as follows.
При замыкании выключател 6 регулируемым резистором 4 (или источником 3 посто нного тока), на амперметре 5 устанавливаетс такое значение посто нного тока 3 / при котором изменени м сопротивлений резисторовWhen the switch 6 is closed by an adjustable resistor 4 (or a source of 3 direct current), on the ammeter 5 this value of direct current 3 is set / at which the resistance of the resistors changes
1и 7 можно пренебречь. Создаваемое падение напр жени на этих резисторах Иц и Uy измер ют потенциометром1 and 7 can be neglected. The voltage drop created by these resistors Itz and Uy is measured by a potentiometer
2с заданной точностью.2 with a given accuracy.
В результате измерени получаемAs a result of the measurement, we obtain
, 1 N 137 Не измен значение тока 1- выключателем 12 , подключают цеп.ь источника 10 переменного тока к исследуемому резистору 7. На амперметре 11 устанавливают такое значение переменного тока J, чтобы создаваема им в резисторе 7 мощность выла равна заданной Р (если мощностью Р от-тока J нельз пренебречь , то она должна быть учтена, т. е. Р Р - Р- ) ., 1 N 137 Do not change the value of the current 1 - switch 12, connect the circuit of the alternating current source 10 to the resistor 7 under test. On the ammeter 11, set the value of the alternating current J so that the power generated by it in the resistor 7 is equal to the specified P (if P from the current J cannot be neglected, then it must be taken into account, i.e. P P - P-).
В установившемс тепловом режиме сопротивление исследуемого резистора 7 будет R 2- как ток J,. const, то падение напр жени на резисторе осталось без изменени U, а на резисторе 7 стало Uy.,., Таким образомIn the steady-state thermal mode, the resistance of the resistor under study 7 will be R 2- as current J ,. const, then the voltage drop across the resistor remains unchanged, and Uy on resistor 7. Thus
,-г. У Из разности между второй и первой формулой определ етс абсолютное измнение дК сопротивлени резистора 7, вызванное выдел ющейс в нем мощностью PJ, g U From the difference between the second and the first formula, the absolute change in dK of the resistance of the resistor 7 is determined, caused by the power released in it PJ
Ux,a. - Ux.Ux, a. - Ux.
1- .RH з:1- .RH h:
ARAR
иand
NN
Использование в предлагаемом устройстве дл измерени приращени сопротивлени резистора от вьадел ющейс в нем мощности новых элементов источника переменного тока и переменного резистора, дополнительного амперметра , конденсатора индуктивности и выключател цепи переменного тока позвол ет- исключить изменение сопротивлени образцового резистора при изменении сопротивлени исследуемого 5 резистора от вьвдел ющейс в нем мощности и повысить таким образом точность измерени .The use in the proposed device for measuring the resistor increment from the power of new elements of the AC source and AC resistor, an additional ammeter, inductance capacitor and AC circuit breaker that is installed in it makes it possible to eliminate the change in the resistance of the reference resistor when the resistance of the test resistor 5 from the voltage changes power and thus improve measurement accuracy.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU762344212A SU815676A1 (en) | 1976-04-06 | 1976-04-06 | Device for measuring resistor resistance increase because of power generated therein |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU762344212A SU815676A1 (en) | 1976-04-06 | 1976-04-06 | Device for measuring resistor resistance increase because of power generated therein |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU815676A1 true SU815676A1 (en) | 1981-03-23 |
Family
ID=20655711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU762344212A SU815676A1 (en) | 1976-04-06 | 1976-04-06 | Device for measuring resistor resistance increase because of power generated therein |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU815676A1 (en) |
-
1976
- 1976-04-06 SU SU762344212A patent/SU815676A1/en active
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