Opical Sensors--signal processing

kamani

Hello Masterminds!!

My aim is to calculate the speed of an elevator using Optical Sensors.

The Optical sensor(mounted on top of elevator) outputs signals in accordance with the speed of the elevator and I was assigned the job of analysing those signals and then calculating the velocity.

For achieving this task, I suppose I should use some kind of Microprocessor for carrying out the signal processing.

Will anybody have an idea of which Micropocessor I have to go for??

thank you...

Kamani

retrogeek

: Hello Masterminds!!
:
: My aim is to calculate the speed of an elevator using Optical Sensors.
:
: The Optical sensor(mounted on top of elevator) outputs signals in accordance with the speed of the elevator and I was assigned the job of analysing those signals and then calculating the velocity.
:
: For achieving this task, I suppose I should use some kind of Microprocessor for carrying out the signal processing.
:
: Will anybody have an idea of which Micropocessor I have to go for??
:
: thank you...
:
: Kamani
:

Hi Kamani

I would think that the process of detecting the outputs of two sensors and measuring the time between them, then calculating the speed would be fairly trivial. I suspect that most any controller with the proper inputs and outputs would be up to the job. There are constraints of course. If size is a problem then one of the smaller pic processors would be appropriate. If environment is important (how hot / cold / wet / oily does it get at the top of an elevator shaft) then an industrial grade controller should be used. (Does it need to be explosion proof?) If compatability is an issure (will the output of your calculation be fed to the elevators controller?) then you should look at controllers that are compatable with the existing elevator controller. Cost? Extensabiliy? All issues that need to be considered. If you are looking for an "all-around general purpose" contoller, then I would suggest a PC/104 bus embedded cpu. These are not too expensive and can be easily addapted to whatever inputs / outputs are required. They use the pc architecture so developement tools are ready available. Test beds are also available, but often, a project can be coded and debugged on the actual cpu to be installed by connecting it to the delopement pc platform through a lan or rs232/485 cable. PC/104 cpus are avaiable using 386,486,5x86 or Pentium processors. I would think that unless your sensors are extremely close together, a 386 would do the job with ease and with less power consumption and greater reliability. Check out winsystems.com or advantech.com or just check Google for "PC/104"

Hope I have given you some ideas

rg

kamani

: : Hello Masterminds!!
: :
: : My aim is to calculate the speed of an elevator using Optical Sensors.
: :
: : The Optical sensor(mounted on top of elevator) outputs signals in accordance with the speed of the elevator and I was assigned the job of analysing those signals and then calculating the velocity.
: :
: : For achieving this task, I suppose I should use some kind of Microprocessor for carrying out the signal processing.
: :
: : Will anybody have an idea of which Micropocessor I have to go for??
: :
: : thank you...
: :
: : Kamani
: :
:
: Hi Kamani
:
: I would think that the process of detecting the outputs of two sensors and measuring the time between them, then calculating the speed would be fairly trivial. I suspect that most any controller with the proper inputs and outputs would be up to the job. There are constraints of course. If size is a problem then one of the smaller pic processors would be appropriate. If environment is important (how hot / cold / wet / oily does it get at the top of an elevator shaft) then an industrial grade controller should be used. (Does it need to be explosion proof?) If compatability is an issure (will the output of your calculation be fed to the elevators controller?) then you should look at controllers that are compatable with the existing elevator controller. Cost? Extensabiliy? All issues that need to be considered. If you are looking for an "all-around general purpose" contoller, then I would suggest a PC/104 bus embedded cpu. These are not too expensive and can be easily addapted to whatever inputs / outputs are required. They use the pc architecture so developement tools are ready available. Test beds are also available, but often, a project can be coded and debugged on the actual cpu to be installed by connecting it to the delopement pc platform through a lan or rs232/485 cable. PC/104 cpus are avaiable using 386,486,5x86 or Pentium processors. I would think that unless your sensors are extremely close together, a 386 would do the job with ease and with less power consumption and greater reliability. Check out winsystems.com or advantech.com or just check Google for "PC/104"
:
: Hope I have given you some ideas
:
: rg
:
:

Hi RG!

thanks for your response.

I will come back to you soon.

I appreciate your style of explanantion.

see you..

Kamani