1 / 14

Operational Amplifiers and Strain gages

Operational Amplifiers and Strain gages. National Instruments http://zone.ni.com/devzone/cda/tut/p/id/3642. Resistance. Resistance is Resistivity ( r ) times L/A. Definition of Strain. percent of length unitless. Strain Gage. Change of resistance with change in length along active axis.

robertshaw
Download Presentation

Operational Amplifiers and Strain gages

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. Operational AmplifiersandStrain gages National Instruments http://zone.ni.com/devzone/cda/tut/p/id/3642

  2. Resistance • Resistance is Resistivity (r) times L/A

  3. Definition of Strain • percent of length • unitless

  4. Strain Gage • Change of resistance with change in length along active axis

  5. Bridge Circuit • Two voltage dividers • Output voltage is labeled VO

  6. Strain Gage Circuit • Tension makes RG+DR higher • Compression makes RG-DR lower • Force F makes VO+ lower in voltage

  7. Strain Gage Amplifier • Note Differential Amplifier • Some elements of bridge with amplifier

  8. Discrete Op-amps

  9. Schematic Diagram

  10. Op-amps embedded in Chips

  11. Switched-Capacitor Amp. Residue Amplifier

  12. Schematic

  13. Comparator

  14. Die Photograph

More Related