SU748254A1 - Converter of resistance increment into frequency - Google Patents
Converter of resistance increment into frequency Download PDFInfo
- Publication number
- SU748254A1 SU748254A1 SU782567647A SU2567647A SU748254A1 SU 748254 A1 SU748254 A1 SU 748254A1 SU 782567647 A SU782567647 A SU 782567647A SU 2567647 A SU2567647 A SU 2567647A SU 748254 A1 SU748254 A1 SU 748254A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- output
- input
- amplifier
- converter
- resistance
- Prior art date
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- Measurement Of Resistance Or Impedance (AREA)
Description
Если напр жение на выходе усилител -ограничител и в начальный момент положительно, тогда при приращении резистора 1 на величину AR к неинвертирующему входу усилител ограничител будет приложено выделившеес на резисторе 2 напр жениеIf the voltage at the output of the limiter amplifier is positive at the initial time, then when the resistor 1 is incremented by the value of AR, the voltage released at resistor 2 will be applied to the non-inverting input of the limiter amplifier
и«and"
равноеequal to
(1)(one)
и на измерительной диагонали моста выделитс напр жениеand on the measuring diagonal of the bridge voltage is highlighted
uRuR
2)2)
72{2R+AR Это .напр жение через усилитель раз бала;нса подаетс на вход интегратора , на выходе которого образуетс линейно-измен ющеес напр жение, характеризующеес крутизной, пропо циональной величине ли. Это напр жение прикладываетс к инвертирующему входу усилител -ограничител и как только его величина достигне значени Uj, выходное напр жение усилител -ограничител мен ет знак При этом к неинвертирующему входу последнего приложитс напр жение а изменившеес по зкаку напр жение на измерительной диагонали моста н чинает разр жать конденсатор интег тора, В момент, когда выходное напр жение последнего достигнет величины - и. изменение напр жени на его выходе и,-1... (3) г 5 ZT период переключени усилител -ограничител в положительную или о рицательную пол рност ( см. фиг. 2); f Сь Ч посто нна времени интегратора; коэффициент усилени усилител разбаланса В результате преобразовани и подстановки выражений (1) и (2) в72 {2R + AR This is the voltage across the power amplifier; the power supply is fed to the input of the integrator, at the output of which a linearly varying voltage is formed, characterized by a slope that is proportional to the value. This voltage is applied to the inverting input of the amplifier-limiter and as soon as its value reaches the value Uj, the output voltage of the amplifier-limiting switch changes sign. In this case, the non-inverting input of the latter is applied and the voltage changed on the measuring diagonal of the bridge starting voltage to press the capacitor of the integrator, At the moment when the output voltage of the latter reaches the value - and. change of voltage at its output and, -1 ... (3) g 5 ZT switching period of the limiting amplifier to positive or negative (see Fig. 2); f Constant of the integrator time; gain gain unbalance As a result of the conversion and substitution of expressions (1) and (2) in
выражение (3) получим частоту, пропорциональную приращению резистора 1expression (3) we obtain a frequency proportional to the increment of resistor 1
c-L.b c-L.b
(4)(four)
Г 8tFG 8tF
. в преобразователе по схеме (2) подобное выражение имеет нелинейную зависимость. in the converter according to the scheme (2), a similar expression has a non-linear relationship
р-А, KAR (5)rA, KAR (5)
Т 8ff2R + AR) T 8ff2R + AR)
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU782567647A SU748254A1 (en) | 1978-01-10 | 1978-01-10 | Converter of resistance increment into frequency |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU782567647A SU748254A1 (en) | 1978-01-10 | 1978-01-10 | Converter of resistance increment into frequency |
Publications (1)
Publication Number | Publication Date |
---|---|
SU748254A1 true SU748254A1 (en) | 1980-07-15 |
Family
ID=20743642
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU782567647A SU748254A1 (en) | 1978-01-10 | 1978-01-10 | Converter of resistance increment into frequency |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU748254A1 (en) |
-
1978
- 1978-01-10 SU SU782567647A patent/SU748254A1/en active
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