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Kapasitive måleprinsipper

Learn how geometric measurements are interpreted through electrostatics, Gauss' Law, dielectric constants, displacement currents, and capacitance sensors. Explore material properties in Fraden's chapters 3.1 and 3.2, Hyperphysics, capacitance principles, electric dipoles, and the relationship between charge and field alignment. Discover the significance of dipole moments, distances, and angles in near and far fields. Enhance your knowledge of capacitive sensors, humidity sensors, and proximity sensors for innovative applications.

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Kapasitive måleprinsipper

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  1. Rene geometriske målinger som kan forstås fra elektrostatikk (gauss lov) Materialavhengige målinger kan forståes ut fra dielektrisitetskonstant og forskyvnings strøm i tillegg til elektrostatikk Materiale fra Fraden kap 3.1 og 3.2 Hyperphysics Fraden kap 7 og 8 Kapasitive måleprinsipper

  2. Capacitive displacement sensor 1

  3. Capacitice displacement sensor 2

  4. Capacitive displacement sensing 3

  5. Capacitive spring based accelerometer

  6. Capacitive finger accelerometer

  7. Electric dipoles 2 (3.10,3.11)

  8. Near- and far field from dipole • Near field depend on: • Charge • Exact location of charges • Far field (dipole field) depend on: • Dipole moment (charge*separation) • Distance from dipole (->amplitude) • Angle with dipole (->direction) Hyperphysics Alonso/Finn: Fundamental univeristy physics

  9. Dipoles in an electric field Due to thermal agitation the alignment of the dipoles is proportional to the applied field!! http://hyperphysics.phy-astr.gsu.edu/hbase/electric/dielec.html Fraden p.47

  10. Total dielectric constant Displaced charge

  11. Capacitive level measurement

  12. Humiditiy sensor

  13. Occupancy

  14. Monopolar capacitive probe

  15. Driven shield proximity sensor

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