Wheatstone bridge
E698385
The Wheatstone bridge is an electrical circuit used to precisely measure unknown resistances by balancing two legs of a bridge network.
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
electrical circuit
ⓘ
measurement instrument ⓘ |
| advantage |
high accuracy in resistance measurement
ⓘ
insensitivity to source voltage fluctuations at balance ⓘ null method reduces instrument error ⓘ |
| appliedIn |
instrumentation amplifiers
ⓘ
laboratory resistance measurement ⓘ pressure sensors ⓘ strain gauge load cells ⓘ temperature compensation circuits ⓘ |
| balanceDetectedBy |
zero current through galvanometer
ⓘ
zero voltage between detector terminals ⓘ |
| canBe |
balanced
ⓘ
unbalanced ⓘ |
| conditionForBalance | ratio of one pair of resistances equals ratio of the other pair ⓘ |
| field | electrical engineering ⓘ |
| hasComponent |
detector
ⓘ
four resistive arms ⓘ galvanometer ⓘ one unknown resistor ⓘ one variable or known resistor ⓘ two known resistors ⓘ voltage source ⓘ |
| hasVariant |
AC bridge
ⓘ
Kelvin bridge NERFINISHED ⓘ Maxwell bridge NERFINISHED ⓘ unbalanced Wheatstone bridge ⓘ |
| inventedBy | Samuel Hunter Christie NERFINISHED ⓘ |
| limitation |
less suitable for very high resistances without modification
ⓘ
less suitable for very low resistances without modification ⓘ requires stable temperature for high accuracy ⓘ |
| measurementType | static resistance measurement ⓘ |
| namedAfter | Charles Wheatstone NERFINISHED ⓘ |
| outputQuantity | voltage difference between bridge midpoints ⓘ |
| popularizedBy | Charles Wheatstone NERFINISHED ⓘ |
| principle |
bridge balance
ⓘ
null measurement ⓘ |
| requires | DC excitation source in basic form ⓘ |
| typicalConfiguration | diamond-shaped resistor network ⓘ |
| usedFor |
bridge-type transducer measurement
ⓘ
measuring unknown resistance ⓘ precise resistance measurement ⓘ sensor signal conditioning ⓘ strain gauge measurement ⓘ temperature sensor measurement ⓘ |
| yearPopularized | 1843 ⓘ |
| yearProposed | 1833 ⓘ |
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Charles Wheatstone
subject surface form:
Charles Wheatstone