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Posted by kartoun on January 20, 2008, 3:45 pm
> kartounwrote:
> > Hi,
> > I'm looking for an accurate distance sensor (I guess that a sonar will
> > be the best).
> > The sensor I'm looking for should be interfaced easily with a PC
> > (RS-232, USB).
> You're asking for two things in one package:
> - a distance/range sensor
> - a communications link
> As for distance/range, check out both ultrasound (sonar) and the Sharp
> GDP2Dx (e.g. GDP2D12) infrared sensors.
> Ultrasound:
> - greater distances
> - larger sensing "cone"
> IR:
> - higher refresh rates
> - generally cheaper & easier to use
> - often less noisy
> - suffer less crosstalk between multiple sensors
> Both technologies can suffer from unusually absorptive or reflective
> materials.
> As for communications, many cheap micros will do. PIC, basic stamp,
> MSP430, ARM, Arduino, ... Here, its generally best to find something
> with a supportive community. RS232 is generally easier to program
> than USB, though a few good USB chipsets have come out in the recent
> years.
> - Daniel
Thanks for your answer.
Perhaps do you know what sonar sensors are installed on the PatrolBot?
They look bigger than the $25-$40 sonar sensors exist on the market.
http://img.linuxexpres.cz/2005/6/roboti/patrolbot.jpg
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> I'm looking for an accurate distance sensor (I guess that a sonar will
> be the best).
> The sensor I'm looking for should be interfaced easily with a PC
> (RS-232, USB).
> Thanks!