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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First, Wheatxtone first law is used to find the currents in junctions B and D:. This page was last edited on 8 Novemberat 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 primary benefit of the circuit is its ability to provide extremely accurate measurements in contrast cigcuito something like a simple voltage divider.
Pont de Wheatstone
The equations for this are:. From Wikipedia, the free encyclopedia. Diode bridge H bridge. The Kelvin bridge was specially adapted from the Wheatstone bridge for measuring very low resistances.
Detecting zero current with a galvanometer can be done to extremely high precision. Accelerometer Angular rate sensor Auxanometer Capacitive displacement sensor Capacitive sensing Gravimeter Inclinometer Integrated circuit piezoelectric sensor Laser rangefinder Laser surface velocimeter Lidar Linear encoder Linear variable differential transformer Liquid capacitive inclinometers Odometer Photoelectric sensor Puenge accelerometer Position sensor Rotary encoder Rotary variable differential transformer Selsyn Sudden Motion Sensor Tachometer Tilt sensor Ultrasonic thickness gauge Variable reluctance sensor Velocity receiver.
Some of the modifications are:. 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.
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Active pixel sensor Angle—sensitive pixel Back-illuminated sensor Charge-coupled device Contact image sensor Electro-optical wwheatstone Flame detector Infrared Kinetic inductance detector LED as light sensor Light-addressable potentiometric sensor Nichols radiometer Optical fiber Photodetector Photodiode Photoelectric sensor Photoionization detector Photomultiplier Photoresistor Photoswitch Phototransistor Phototube Position sensitive device Scintillometer Shack—Hartmann wavefront sensor Single-photon avalanche diode Superconducting nanowire single-photon detector Transition edge sensor Tristimulus colorimeter Visible-light photon counter Wavefront sensor.
PUENTE DE WHEATSTONE by Héctor Miguel Guzmán on Prezi
Kelvin bridge Wheatstone bridge. Retrieved from ” https: Electrical meters Bridge circuits Measuring instruments English inventions Impedance measurements.
To do so, one has to work out the voltage from each potential divider and subtract one from the other. Published in “Engineering Science and Education Journal”, volume 10, no 1, Februarypages 37— The Wheatstone bridge illustrates the concept of a difference measurement, which can be extremely accurate.
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Wheatstone bridge – Wikipedia
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. The concept was extended to alternating current measurements by James Clerk Maxwell in and further improved by Alan Blumlein around A Wheatstone bridge is an electrical circuit used to measure pudnte unknown electrical resistance by balancing two legs of a bridge circuitone leg of which includes the unknown component.
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.
At this point, the voltage between the two midpoints B and D will be zero. 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.
Schering Bridge Wien bridge. Geophone Hydrophone Microphone Seismometer. The desired value of R x is now known to be given as:. 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.