El puente de Wheatstone deriva su nombre del físico inglés Sir En un circuito puente, la disposición de las resistencias que lo caracterizan. Un Kelvin puente, también llamado puente de Kelvin doble y en algunos países Puente de Para medir tales resistencias, se requiere un circuito de puente diseñado para trabajar con resistencias de La operación del puente de Kelvin es muy similar al puente de Wheatstone, pero utiliza dos resistores adicionales. Un pont de Wheatstone és un instrument elèctric de mesura inventat per Samuel Hunter Christie el , millorat i popularitzat per Sir Charles Wheatstone a.
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Puente de Kelvin
The Kelvin bridge was specially adapted from the Wheatstone bridge for measuring very low resistances.
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In many cases, the significance of measuring the unknown resistance is related to measuring the impact of some physical phenomenon such as force, temperature, pressure, etc. The primary benefit of the circuit is its ability to provide extremely accurate measurements in contrast with something like a simple voltage divider. First, Kirchhoff’s first law is used to find the currents in junctions B and D:.
Schering Bridge Wien bridge.
The concept was extended to alternating current measurements by James Clerk Maxwell in and further improved by Alan Blumlein around This setup is frequently used in strain gauge and resistance thermometer measurements, as it is usually faster to read a voltage level off a meter than to adjust a resistance to zero the voltage. Breathalyzer Carbon dioxide sensor Carbon monoxide detector Catalytic bead sensor Chemical field-effect transistor Electrochemical gas sensor Electrolyte—insulator—semiconductor sensor Electronic nose Fluorescent chloride sensors Holographic sensor Hydrocarbon dew point analyzer Hydrogen sensor Hydrogen sulfide sensor Infrared point sensor Ion selective electrode Microwave chemistry sensor Nitrogen oxide sensor Nondispersive infrared sensor Olfactometer Optode Oxygen sensor Pellistor pH glass electrode Potentiometric sensor Redox electrode Smoke detector Zinc oxide nanorod sensor.
The equations for this are:. Air—fuel ratio meter Blind spot monitor Crankshaft position sensor Curb feeler Defect detector Engine coolant temperature sensor Hall effect sensor MAP sensor Mass flow sensor Omniview technology Oxygen sensor Parking sensors Radar gun Speed sensor Speedometer Throttle position sensor Tire-pressure monitoring system Torque sensor Transmission fluid temperature sensor Turbine speed sensor Variable reluctance sensor Vehicle speed sensor Water sensor Wheel speed sensor.
Geophone Hydrophone Microphone Seismometer. One of the Wheatstone bridge’s initial uses was for the purpose of soils analysis and comparison.
Puente de Kelvin – Wikipedia, la enciclopedia libre
Electrical meters Bridge circuits Measuring instruments English inventions Impedance measurements. The Wheatstone bridge illustrates the concept of a difference measurement, which can be extremely accurate. The Wheatstone bridge is the fundamental bridge, but there are other modifications that can be made to measure various kinds of wheatstlne when the fundamental Wheatstone bridge is not suitable.
At this point, the voltage between the two midpoints B and D will be zero. In other projects Wheatstonr Commons.
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Detecting zero current with a galvanometer can be done to extremely high precision. Some of the modifications are:. A Wheatstone bridge is an electrical circuit used to measure an unknown electrical resistance by balancing two legs of a bridge circuitone leg of which includes the unknown component. Variations on the Wheatstone bridge can be used to measure capacitanceinductanceimpedance and other quantities, such as the amount of combustible gases in a sample, with an explosimeter.
On the other hand, if the resistance of the galvanometer is high enough that I G is negligible, it is possible to compute R x from the three other resistor values and the supply voltage V Sor the supply voltage from all four resistor values. To do so, one has to work out the voltage from each potential divider and subtract df from the other.
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Kelvin bridge Wheatstone bridge.