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- Newsgroups: comp.robotics
- Path: sparky!uunet!charon.amdahl.com!pacbell.com!tlhouns
- From: tlhouns@ns.pacbell.com (Lee Hounshell)
- Subject: Re: Cheap, light orientation sensor needed
- Message-ID: <1992Nov6.213500.6330@PacBell.COM>
- Sender: news@PacBell.COM (Pacific Bell Netnews)
- Organization: Pacific Bell
- X-Newsreader: TIN [version 1.1 PL6]
- References: <1992Nov6.171604.29238@kronos.arc.nasa.gov>
- Date: Fri, 6 Nov 1992 21:35:00 GMT
- Lines: 35
-
- In article <1992Nov6.165554.16576@PacBell.COM> tlhouns@ns.pacbell.com (Lee Hounshell) writes:
- >
- >I had an idea for constructing one using "bend" sensors with weights attached
- >to one end. As the robot's orientation would change, the sensors would move
- >(because of gravity pulling the weights). If several of these sensors were
- >placed strategically inside a robot's chassis, I suspect that one could calculate
- >the robot's orientation fairly accurately. Any comments?
-
- To clarify my earlier posting:
-
- You would need to place 6 of these "bend" sensors in a small enclosed box, one
- in the center of each "wall" of the box. This box would be contained within
- the body of the robot. For an individual sensor, you wouldn't know exactly
- which way the tilt occurred. But by looking at all 6 of the sensors together,
- I think you could calculate orientation, as well as "invertedness."
-
- - the "bottom-most" sensor would always have the most "bend".. as it would
- probably form a "U-like" shape.
-
- - the "top-most" sensor would usually have almost no bend, as it would hang
- mostly straight down. This (along with the bottom sensor) let you determine
- up/down orientation.
-
- - the "right/left/front/back" sensors would allow you to determine roll
- and pitch.
-
- - You'd need an electronic compass mechanism of some sort to determine yaw.
- Anyone know of one?
-
- Anyone know of a reason why this arrangement *wouldn't* work?
- Are "bend" sensors flexible enough for this type of task?
- Is there a way to easily attach them "perpendicular" to a wall?
- And add a weight to the free end?
-
- -Lee
-