Need help in choosing the board or microcontroller

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1

Hi,
I have been searchinf for hours adnd now I have came here to get some help in my problem.
I wanna control 6 dc motors of 48V. I wanna run them through image processing, So kindly suggest me some board or microcontroller for this. I have looked at arduino and raspberry pi. But I am confused which one I should get??????


And my next question is that I have calculated distance b/w object and my robot through image processing, now how I can send this distance to robot's motor that should move for some specific time???????????
Thanks! 

2

So many questions, and, an almost double post. :slight_smile:

To answer the motor control question, I will offer some ideas in that thread.

Last question first. How to move motors a specific distance.

I would suggest you look at encoders. Knowing the circumference of your tires and how many pulses per revolution will allow you to manage to control motors pretty well with respect to moving a set distance.

First question last because it is more difficult to answer.

You want to (paraphrasing) take a picture and figure out distances based on some unstated data. I say unstated because all you have said is you want to calculate a distance from a b/w image. IF you had 2 cameras, and, IF you were doing some fancy calculations with the two pieces of data, you might be able to approximate a relative distance to the object. That being said, I am not sure either one of the two boards you mentioned will have enough “horsepower” to do anything with that much data in a reasonable timeframe. I can pretty much assure you that an 8bit arduino will not be able to handle the kind of image processing you are after. I would not bet that an RPi can manage to do much with that amount of data at a reasonable speed. Given that you are running 6 48v motors, you might be able to step up to a used laptop or a small form factor (ITX/mini ITX) board.

Once you more explicitly state how and what. I believe you will get more, better answers. 

3

???

Stop doing this "???"

It is stupid, it makes you look like a moron, and I am getting damn sick of it.

Fix this post now.

4

Sorry!

Sorry for confusing post! Infact I was in hurry when I was Posting it. Now I’m fixing it!!!

5

Sorry

Sorry all guys for such a confusing post, I’m gonna correct it. I was in great hurry when typing it.

6

I got it and :slight_smile: and more info!

I got your last question’s answer :slight_smile:
And now more details about first question!
I am taking images from a bluetooth webcam and then taking images constantly at specific intervals. I am doing this in laptop in Matlab. Then after image processing, I have calculated the distance b/w the object and robot. Now my question is that how I can send this distance to robot through arduino. 

7

Useful?

Serial comm to Arduino through Matlab:

http://www.mathworks.com/help/simulink/ug/configure-serial-communications.html

Motor Control with Arduino: A Case Study in Data-Driven Modeling and Control Design

http://www.mathworks.com/company/newsletters/articles/motor-control-with-arduino-a-case-study-in-data-driven-modeling-and-control-design.html

I don’t know if they’re any help but they came up on Google after searching out of curiosity. I don’t speak matlab but the last one looked full of info lol

8

I think I have almost solved

I think I have almost solved the problem of driving 48V motor!
Motors are of 48V and it’s stalling current is less then 1A, almost 0.6A,0.7A. I have h-bridge. And I am giving driving voltage of 48V through H-bridge to run motor. Now I think I just have to connect PWM pin with arduino PWM pin.