Author Topic: Rangefinders  (Read 3144 times)

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Offline NGuggemosTopic starter

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Rangefinders
« on: August 13, 2011, 10:40:10 PM »
What is a rangefinder capable of finding the range of something 50 feet away that is axon capable?

Offline Soeren

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Re: Rangefinders
« Reply #1 on: August 14, 2011, 03:58:44 AM »
What is a rangefinder capable of finding the range of something 50 feet away that is axon capable?
Expensive.
Regards,
Søren

A rather fast and fairly heavy robot with quite large wheels needs what? A lot of power?
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Offline rbtying

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Re: Rangefinders
« Reply #2 on: August 14, 2011, 09:42:00 AM »
Doesn't have to be - you could use a 50 foot long stick with a switch at the end, and a linear encoder switch to figure out how much of the stick was extended before hitting an object. (This would be more like a tape measure than a rangefinder... but wtv.)

Offline corrado33

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Re: Rangefinders
« Reply #3 on: August 14, 2011, 10:11:12 AM »
What kind of sensors do they use in those "follow behind" cruise control systems you see in cars?

Offline owk

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Re: Rangefinders
« Reply #4 on: August 14, 2011, 01:43:48 PM »
would there be a way to hack the golf laser range finders and feed the info into an axon?

Offline Soeren

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Re: Rangefinders
« Reply #5 on: August 14, 2011, 03:14:49 PM »
Hi,

would there be a way to hack the golf laser range finders and feed the info into an axon?
Of course... You just have to find it.

I'd rather hack a Bosch LASER tape though (range: a few cm to ~40m with a precision of ~1mm). - Far better than any Bushnell ranger I know of :)
Regards,
Søren

A rather fast and fairly heavy robot with quite large wheels needs what? A lot of power?
Please remember...
Engineering is based on numbers - not adjectives

Offline NGuggemosTopic starter

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Re: Rangefinders
« Reply #6 on: August 18, 2011, 05:23:48 PM »
Thanks for the suggestions!

Offline NGuggemosTopic starter

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Re: Rangefinders
« Reply #7 on: August 18, 2011, 05:25:10 PM »
Does anyone no where to buy these or how expensive they are???

Offline TrickyNekro

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Re: Rangefinders
« Reply #8 on: August 18, 2011, 06:57:18 PM »
What is a rangefinder capable of finding the range of something 50 feet away that is axon capable?
Expensive.


That was surrealistic... You can always pinball it....

But hey, really now... You are surrealistic... I did some good research, feels like things have changed.
I mean 30 - 40 dollars.... That not expensive for such a system...

http://www.google.gr/#hl=el&sa=X&ei=vLNNTqSlN8fV4QTkkKm0Bw&sqi=2&ved=0CCEQBSgA&q=diy+laser+rangefinder&spell=1&bav=on.2,or.r_gc.r_pw.&fp=828907e1d731ed99&biw=1280&bih=839
For whom the interrupts toll...

Offline rbtying

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Re: Rangefinders
« Reply #9 on: August 19, 2011, 10:38:57 AM »
The ~$30 setups are only good for distances <3-4m, from what I recall - 50 feet is more in the range of 15m, and at that point you won't be able to detect the reflected laser light (short of getting a more powerful laser, or doing some filtering / modulation)

Offline TrickyNekro

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Re: Rangefinders
« Reply #10 on: August 19, 2011, 08:30:39 PM »
The ~$30 setups are only good for distances <3-4m, from what I recall - 50 feet is more in the range of 15m, and at that point you won't be able to detect the reflected laser light (short of getting a more powerful laser, or doing some filtering / modulation)

You always need to play around with hacking.

Altering the focal plane (by varying the lens distance) and maybe getting a more powerful laser yes...

But... What matters really is the focal plane... No filtering etc...
Of course that way you are altering the sensitivity of the sensor, but in a digital world range comes with a price ;-)
For whom the interrupts toll...

Offline NGuggemosTopic starter

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Re: Rangefinders
« Reply #11 on: August 25, 2011, 03:00:16 PM »
Those sound like good ideas!

 

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