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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The Wheatstone bridge illustrates the dee of a difference measurement, which can be extremely accurate. The Kelvin bridge was specially adapted from the Wheatstone bridge for measuring very low resistances. The desired value of R x is now known to be given as:.
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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. 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 Piezoelectric accelerometer Position sensor Rotary encoder Rotary variable differential transformer Selsyn Sudden Motion Sensor Tachometer Tilt sensor Ultrasonic thickness gauge Variable reluctance sensor Velocity receiver.
At this point, the voltage between the two midpoints B and D will be zero. 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.
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.
Detecting zero current with a galvanometer can be done to extremely high precision. 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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This page was last edited on 8 Novemberwheatstne First, Kirchhoff’s first law is used to find the currents in junctions B and D:. To do so, one has to work out the voltage from each potential divider and subtract one from the other. One of the Wheatstone bridge’s initial uses was for the purpose of soils analysis and comparison. Kelvin bridge Wheatstone bridge.
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The primary benefit of the circuit is its ability to provide extremely accurate measurements in contrast with something like a simple voltage divider. Geophone Hydrophone Microphone Wheattsone. Views Read Edit View history.
Published in “Engineering Science and Education Journal”, volume 10, no 1, Februarypages 37— The concept was extended to alternating current measurements by James Clerk Maxwell in and further improved by Alan Blumlein around 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. Electrical meters Wheztstone circuits Measuring instruments English inventions Impedance measurements.
Pont de Wheatstone – Viquipèdia, l’enciclopèdia lliure
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 equations for this are:. From Wikipedia, the free encyclopedia. In other projects Wikimedia Commons.
Puente de Kelvin – Wikipedia, la enciclopedia libre
Some of the modifications are:.