1 / 10

Discussion of the experiment

Discussion of the experiment. Weifeng Su 04/10/2009. I 1. I 3. I G. I 2. I 4. Wheatstone bridge. Principle : R A & R B are connected in series. R X & R S are connected in series. R A & R X are connected in parallel.   R B & R S are connected in parallel .

zaina
Télécharger la présentation

Discussion of the experiment

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Discussion of the experiment Weifeng Su 04/10/2009

  2. I1 I3 IG I2 I4 Wheatstone bridge Principle: • RA & RB are connected in series. RX & RS are connected in series. RA & RX are connected in parallel.   RB & RS are connected in parallel. • When bridge is balanced, 1) IG=0, I1=I3 and I2=I4 2)potential of point ‘2’ = potential of point ‘4’, U2=U4 So, I1RA=I2Rx (1) I3RB=I4Rs (2) (1)/(2), Fig. 1The circuit diagram of a Wheatsone bridge

  3. G Wheatstone bridge • Set up the circuit S2 • Balancing the bridge coarse adjustment & finer adjustment How can we get the largest sensitivity? S1 E Determine the measurement uncertainty of RX when the sensitivity M is the largest.

  4. Oscilloscope • Principle:

  5. Oscilloscope • Principle:

  6. http://chem.ch.huji.ac.il/instruments/test/oscilloscope_principle_animated.htmlhttp://chem.ch.huji.ac.il/instruments/test/oscilloscope_principle_animated.html

  7. Oscilloscope • Lissajous figure Lissajous Figures are a special case of parametric equations, where x and y are in the following form: x =A sin(at + δ) y =B sin(bt + γ) Lissajous curves can be seen on oscilloscopes and are the result of combining 2 trigonometric curves at right angles. • http://pagesperso-orange.fr/olivier.granier/meca/simul/lisajou/simul.html

  8. Oscilloscope • How to measure a signal by oscilloscope? To measure a DC signal 0.5V/DIV 2.68DIV×0.5V/DIV=1.34V

  9. Oscilloscope • How to measure a signal by oscilloscope? To measure an AC signal 0.5V/DIV 2ms/DIV Peak-peak amplitude:3.56DIV×0.5V/DIV=1.78V Period: T=3.16DIV×2ms/DIV=6.32ms;Frequency:f=1/T=158Hz

  10. Input signal Input signal Output signal Output signal The property of diode to allow an electric current in one direction full-wave rectification half wave rectification

More Related