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Topic: Ping and oblique angles (Read 531 times) previous topic - next topic

crchisholm

I'm sure this is not a new issue.  My robot uses a ping to look for obstacles and then when found, it stops sweeps 180 degrees (10 segments) looking for a clear path.   I am having a problem with surfaces at oblique angles to the ping in that it can't correctly determine the distance.  I am pretty sure that I would have s the same issue with the Sony IR sensor, but not sure.  Has anyone run into a solution for this problem?  The sensor works perfectly in every other way.

Charlie
Charlie R Chisholm

liudr

Not sure what I could have done to avoid that but just trying to come up with something here: will putting a vertical scan motor help?

crchisholm

Quote
will putting a vertical scan motor help


I'm afraid I don't understand.   What do you mean by vertical scan motor?  I am open to any suggestion.
Charlie R Chisholm

liudr

Just my thought: Scan horizontally and find an obstacle, then scan vertically to see if the obstacle is changing slightly (can't pass) or rapidly disappears (ramp). You need a motor to scan up and down.

crchisholm

Not real sure how that would help.  If the problem is that the ping is bouncing off in another direction like light in a mirror, then it seems that it would do that even if I scanned up and down.  I will have to think about that some more.   

Thank you for your suggestion, none the less.   Anything that causes to me to think from another angle is a good suggestion.

Charlie R Chisholm

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