Number Of IR's Needed For Boe Bot To roam the house.
Trying to get my Boe-Bot to roam the house. I recently had two (2) IR's pointed in the front @ 45deg of each other. Was not able to see the walls as the bot angled in and had a dead zone in front were the eyes would not see the object at all. Now have the two(2) IR's pointed Straight ahead and about 1" space between them. This is a little better but I still have a problem with walls on the side and directly in front.
To make a long story short, trying to determine what I need and I come up with six(6) IR's. Four in front (Left Front, Right Front, Front for Height, Front For Drop-off's, and one on each side). I also think that this might be overkill.
So, help. Is there a more effiecent way to use the IR's to allow using less, or to adaquatly allow the Bot to see, I will need this many IR's (or possibly more)!
Thanks
Don "Ho"
To make a long story short, trying to determine what I need and I come up with six(6) IR's. Four in front (Left Front, Right Front, Front for Height, Front For Drop-off's, and one on each side). I also think that this might be overkill.
So, help. Is there a more effiecent way to use the IR's to allow using less, or to adaquatly allow the Bot to see, I will need this many IR's (or possibly more)!
Thanks
Don "Ho"
Comments
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Chris Savage
Parallax Tech Support
csavage@parallax.com
Thanks
Don "Ho"
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Chris Savage
Parallax Tech Support
csavage@parallax.com
IR is well known for not seeing black objects.
The sonar might sense a general path and the IR might navigate obstacles closer at hand.
Finally, you should have 'whiskers' or 'bumpers' as tactile collision is a very real part of navigation that takes place when all else fails [noparse][[/noparse]just look at any pub at closing time to see what I mean].
Also, if you really want it to roam the house, you might consider a couple of drop-off IR sensors that are pointed straight down. That way it won't wander down a stairwell.
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"When all think alike, no one is thinking very much.' - Walter Lippmann (1889-1974)
······································································ Warm regards,····· G. Herzog [noparse][[/noparse]·黃鶴 ]·in Taiwan
·· Actually a combination of sensors would be the "best" approach since that would compensate for shortcomings of other sensors.· Even sonar isn't perfect.· Uneven or angular surafces will not reflect sound well.
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Chris Savage
Parallax Tech Support
csavage@parallax.com
I am now thinking of 4 IR in the front, with one pointing downward, 1 on each side. One Sonar mounted on a servo. And I guess now, wiskers.
This will take more pins that one stamp will have, so I will need to figure out how to make two stamps talk to each other. Should I continue to use the Boe-bot chassis to do this, or should I just bite the bullet and bulid one from the ground up..
Decsions, Decsions, Decsions..
·· Not necessarily...I went through this once too trying to overload my first BOE-Bot to cover everything...Of course there was no PING))) then so I lost two pins to Sonar.· In any event I later decided to look at websites that showcase various bots, especially those used in competitions.· My research showed that will a little forethought and ingenuity you can come up with a simple, yet powerful sensor array.· Many of the bots I discovered that were simpler won more competitions because their controllers had less work to do monitoring many unused sensors while being able to focus more on a way of dealing with the data they did have.· Just a thought.
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Chris Savage
Parallax Tech Support
csavage@parallax.com
High 6
pause 3
rctime 6, 1, photocellL
if ( photocellL > 100) then
gosub forward
something like that... [noparse]:)[/noparse]
Many of the Parallax customers are beginners, so the books focus on introducing 'one thing at a time'.
But, if you want a robot to survive, it likely needs something akin to our 'five senses'.
We truly rely on all to navigate and protect us.
While you can obviously consider eliminating taste and smell, you might add something akin to balance.
There are also different degrees of importance based on how far away the information comes from.
That is why bumpers are quite important.
When all else fails, stubbing your toe or bumping your arm tells to revise your navigation.
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"When all think alike, no one is thinking very much.' - Walter Lippmann (1889-1974)
······································································ Warm regards,····· G. Herzog [noparse][[/noparse]·黃鶴 ]·in Taiwan
Been so long trying to get this done, I dont know what is next. I do have the Wheel watchers and the bot does not go straight, so I need to research this more to make this work.
Another question is how much can I put on before I see a voltage drop?