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.
|Published (Last):||21 March 2014|
|PDF File Size:||4.14 Mb|
|ePub File Size:||14.3 Mb|
|Price:||Free* [*Free Regsitration Required]|
Kelvin bridge Wheatstone bridge. In other projects Wikimedia Commons.
At this point, the voltage between the two midpoints B and D will be zero. Wheatstons Kelvin bridge was specially adapted from the Wheatstone bridge for measuring very low resistances. 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 ;uente sensor Water sensor Wheel speed sensor.
One of the Wheatstone bridge’s initial uses was for the purpose of soils analysis and comparison.
Puente de Kelvin – Wikipedia, la enciclopedia libre
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.
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 d not suitable. 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.
Variations on the Wheatstone bridge can be used sheatstone measure capacitanceinductanceimpedance and other quantities, such as the amount of combustible gases in a sample, with an explosimeter. Active pixel sensor Angle—sensitive pixel Back-illuminated sensor Charge-coupled device Contact image sensor Electro-optical sensor 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 Wheatwtone 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.
Some of the modifications are:. Retrieved from ” https: This setup is frequently used wheatstonw 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.
Schering Bridge Wien bridge. This page was last edited on 8 Novemberat The concept was extended to alternating current measurements by James Clerk Maxwell in and further improved by Alan Blumlein around 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.
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. Geophone Hydrophone Microphone Seismometer.
The desired value of R x is now known to be given as:. The Wheatstone bridge illustrates the concept of a difference measurement, which can be extremely accurate. To do so, one has to work out the voltage from each potential divider and subtract one from the other. Electrical meters Bridge circuits Measuring instruments English inventions Impedance measurements. 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 puenre 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.
Detecting zero current with a galvanometer can be done to extremely high precision. Views Read Edit View history.
First, Kirchhoff’s first law is used to find the currents in junctions B and D:. Published in “Engineering Science and Education Journal”, volume 10, no 1, Februarypages 37—