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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From Wikipedia, the free encyclopedia. The Wheatstone bridge illustrates the concept of a difference measurement, which can be extremely accurate. Schering Bridge Wien bridge.
Wheatstone bridge – Wikipedia
First, Kirchhoff’s first law is used to find the currents in junctions B and D:. 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 Dd Optode Oxygen sensor Pellistor pH glass electrode Potentiometric sensor Redox electrode Smoke detector Zinc oxide nanorod sensor.
Cirvuito many cases, the significance of measuring the unknown resistance is related to measuring the wheatshone of some physical phenomenon such as force, temperature, pressure, etc. Electrical meters Bridge circuits Measuring instruments English inventions Impedance measurements. 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.
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On the other hand, if the resistance of the galvanometer is high eheatstone 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.
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Detecting zero current with a galvanometer can be done to extremely high precision. One of the Wheatstone bridge’s initial uses was for the purpose of soils analysis and comparison.
Puente de Kelvin
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. Kelvin bridge Wheatstone bridge. This page was last edited on 8 Novemberat Views Read Edit View history.
Retrieved from ” https: The Hweatstone bridge was specially adapted from the Wheatstone bridge for measuring very low resistances. The equations for this are:.
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The Wheatstone bridge is the fundamental bridge, but there are other modifications that can be made to measure various kinds of resistances when the fundamental Wheatstone bridge is not suitable.
The desired value of R x is now known to be given as:. The primary benefit of the circuit is its ability to provide extremely accurate measurements in contrast with something like a simple voltage divider. This setup is frequently used in strain gauge and resistance circuiyo measurements, as it is usually faster to read a voltage level off a meter than to adjust a resistance to zero the voltage. To do so, one has to work out the voltage from each potential divider and subtract one from the other.
PUENTE DE WHEATSTONE by Héctor Miguel Guzmán on Prezi
Published in “Engineering Science and Education Journal”, volume 10, no 1, Februarypages 37— At this point, the voltage between the two midpoints B and D will be zero.