Robotics : 27316


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Subject:	Re: NXT Program: How to avoid stop-and-go? (US-Sensor in angle)
Newsgroups:	lugnet.robotics
Date:	Mon, 24 Dec 2007 00:31:58 GMT
Original-From:	bigboss97 <bigboss97.geo@=avoidspam=yahoo.com>
Viewed:	5446 times

I found a very interesting (and beautiful) site: http://www.tik.ee.ethz.ch/tik/education/lectures/PPS/mindstorms/sa_nxt/index.php?page=tests_us bigboss97 wrote: > > Strangely, it slows down, i.e. it detects the further distance (less > reflection?) in the same angle. > I tried to put the US-sensor vertically. It still shows the same effect. > I also notice the closer it comes the larger angle it needs to get a > reaction. I observed... > When the vehicle hits the wall with a flat angle and I leave it running, > it keeps on pushing to the wall. I noticed that it only turns around when > the vehicle has been pushed to a position of almost 90 degree. The sensor > is almost covered by the all. The angle range is even smaller than if it > comes from a distance. > > -- View this message in context: http://www.nabble.com/NXT-Program%3A-How-to-avoid-stop-and-go--tp14446433p14483411.html Sent from the LEGO Robotics mailing list archive at Nabble.com.

Message has 2 Replies:

		Re: NXT Program: How to avoid stop-and-go? (US-Sensor in angle)
(...) That is a very interesting site, with some interesting information... but you might like to do those experiments yourself. For instance, the odd "ledge" in their data at 48 cm is not a feature with my US sensors - they may have been working (...) (17 years ago, 25-Dec-07, to lugnet.robotics)

		Re: NXT Program: How to avoid stop-and-go? (US-Sensor Test Values)
I tried to use a program to log the distance while the US-sensor is moving forward. Unfortunately, it doesn't go straight all the time. So, I simply display the US value and put the vehicle in different position manually. Here are my test values for (...) (17 years ago, 27-Dec-07, to lugnet.robotics)

Message is in Reply To:

		Re: NXT Program: How to avoid stop-and-go? (US-Sensor in angle)
Strangely, it slows down, i.e. it detects the further distance (less reflection?) in the same angle. I tried to put the US-sensor vertically. It still shows the same effect. I also notice the closer it comes the larger angle it needs to get a (...) (17 years ago, 23-Dec-07, to lugnet.robotics)

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