what type of sensors available for measuring speed?
which sensors are best for measuring speed?why?
post some materials
Whoops, that has to be a bit more precise:
Airplane TAS? -> measuring pressure, temperature
Ship (Log) -> Pulses from log
Car (Tachometer) Pulses from tach-sensor
Bicycle -> one pulse per revolution
Flux of a liquid
Approach to an obstracle -> sonar or microwave echo
... and so on
Are you trying to measure -
1) Angular rotation speed/acceleration ?
2) Linear speed/acceleration ?
3) Target object you are trying to measure ?
4) Accuracy of measurement ?
5) Resolution of measurement ?
6) Object material under motion ?
7) Environmental conditions ?
for linear speed
Linear speed was on your list, Dana.
Next questions could be how to pick up the speed:
shaft encoding / optical
In order to help you more of the questions need to be answered.
Are you trying to measure the speed of a butterfly or a Higgs Boson ?
And the other questions posed in earlier part of this, your thread.
difference b/w optical sensor and ir optocoupler? which is best for measuring rpm>?
Hall effect -
Still we are in a guess: what is the object you're going to measure its speed, what rpm do you expect and
is the measurement a fixed assembly or are you building a hand-held device that you want to show rpms picked up contact-less from any or from special surfaces. Are the rpms low enough to fix sometihn to the object (magnet / refection stripe?