what is switch hysteresis?

Question

iv got a project on switch hysteresis and im having trouble exactly pin pointing what it is, so far all i have is its the delay between actualy switching the switch and the time in which u get the out put, it has to be about 1000 words long and i dont have much info to gwet it that long, any help?

Answer 1

On-Off switch hysteresis is the situation where with no force applied the switch does not change position, whether on or off, but definite force in the reverse direction can reverse the switch.

http://www.automotion.info/typo3temp/pics/bf5451db84.jpg



Classical hysteresis is like flux density vs magnetizing force (called Beta-H). This will make everything clear:

http://www.ndt-ed.org/EducationResources/CommunityCollege/MagParticle/Physics/HysteresisLoop.htm



For more general ideas and a decent project, look these over:

http://www.google.com/images?hl=en&q=hysteresis&um=1&ie=UTF-8&source=og&sa=N&tab=wi&biw=1024&bih=433

Answer 2

Switching Hysteresis

Answer 3

Hysteresis is basically the asymmetry between an on-off transition and an off-on transition. It can manifest itself as a delay, in which case the delay will be longer for one of the two. A switch with no hysteresis will take exactly as long to turn on as to turn off.



A Schmitt trigger is a special kind of digital switch with a large amount of hysteresis designed in. It takes a significant excursion of the input in order to change states. The input voltage must go well past the normal threshold in order to generate an output, and the output will not change again even if the input varies. The input must go well beyond the original threshold in order to change the state of the output.

Answer 4

1000 Words ~ its A lot



Try going with this :

Hysteresis is ...(100 words).

Switching hysteresis (250 words)

Hysteresis in different systems like switching (650 words)



Displacement sensors using lasers have pulses which can be considered as samplingRate*duration(sec) times switching switch and the measurement towards and backwards give different results . This is because of the hysteresis.

blabla works like switch has hyst ...



GG

Answer 5

let me use a pushbutton switch as an example.



If you slowly push it just until it changes state, then you have to release it a bit in the other direction until it changes back. The difference between the first position and the second is the hysteresis.