Newsgroups: comp.robotics
Path: brunix!uunet!meaddata!sdw
From: sdw@meaddata.com (Stephen Williams)
Subject: Re: Seeking high-resolution ultrasound system
References: <92315.0022523034871@QUCDN.QueensU.CA>
Sender: news@meaddata.com (Usenet Administrator)
Organization: Mead Data Central, Dayton OH
Date: Tue, 10 Nov 1992 19:21:23 GMT
Message-ID: <1992Nov10.192123.14608@meaddata.com>
Lines: 27

First idea to glide past:

Mount 3 or more directional accelerometers and watch their relative
strengths during apogee (bounce).  

3 pressure transducers on the 'foot' would work also.

3034871@QUCDN.QueensU.CA (Ralph Siemsen) writes:
: We're looking for some ultrasonic (or otherwise) detector to measure
: distances of 5-15 cm to an accuracy of +- 0.5cm or better.
: 
: The intended application is to measure the angle (by triangulation)
: of a monopod robot relative to the ground. We have considered
: accelerometers, but the bouncing action of the robot makes them
: innefective. Commercial angle sensors are expensive ($1500) and we
: really only care about a small range of angles (20 degrees), rather
: than the full 180 degrees that most commercial units offer.
: 
: So it would be quite easy to measure the distance to the ground from
: a platform atop the robot. All we need is a nice sensor.
...
sdw
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