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Author Topic: sensor advice  (Read 799 times)

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Offline vergauwen_johanTopic starter

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sensor advice
« on: October 31, 2010, 06:26:05 PM »
hi, i am building a rover robot. i want it to do some object avoidance ( obviously ) and maybe in the futere some mapping and path finding.
i don't want it to hit something an than say, "hey here is an object". i want contactles detection but here comes the catch. the robot is 50cm x 50cm and will be use in- en outdoors.
one sonar is not enough to detect all angles an scanning is way to slow for indoor or maybi that's my programing  :-\ . using more sonars (>10) will quikly become verry expensive.
the sharp range IR sensors are not relyible outdoor but are cheaper and can be used by the dozen.
can someone give me some advice or mabe a third option?

ps: lidar is no option unless there is a cheap model that actually is for sale  ;D


« Last Edit: October 31, 2010, 06:33:35 PM by vergauwen_johan »

Offline Soeren

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Re: sensor advice
« Reply #1 on: November 03, 2010, 10:14:28 AM »
Hi,

one sonar is not enough to detect all angles an scanning is way to slow for indoor or maybi that's my programing  :-\ . using more sonars (>10) will quikly become verry expensive.
the sharp range IR sensors are not relyible outdoor but are cheaper and can be used by the dozen.
can someone give me some advice or mabe a third option?
If you just want to detect an obstacle and not the exact distance to it, pulse some IR LED's and receive the reflected light (if an obstacle is in place) by a number of integrated IR receivers like the ones used in TV remote controls - just get a slightly different variant, which is made for light curtains, as the AGC in the TV type receivers seriously dampen a continuous signal (since it would be unwanted noise in a remote control setting).
Either that, or make your own 360° LIDAR  ;D
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 vergauwen_johanTopic starter

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Re: sensor advice
« Reply #2 on: November 07, 2010, 04:41:50 PM »
hi, thanks for the responce.
in the beginning, i just want to drive around but when that is working, then i want to switsh over to distance mesure ment and som simple form  of mapping

 


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