Sharp Tilt Sensor

[Toukisarchu]

Hey guys. was just looking through a website and found this tilt sensor

Sharp GP1S036HEZ Tilt Sensor
http://www.active-robots.com/products/sensors/sharp/gp1s036hez.pdf

The single sensor will detect foward backward left and right. Looks like a good little addition to a humanoid.

They are nice and cheap also!
http://www.active-robots.com/products/sensors/sensors-sharp.shtml

[Toukisarchu]

hmm... now that I think about it this may not have a centre off. so the addition of a second sensor on a different axis to cross reference with will probably be needed, but something linear will probably do.

[inaki]

The Sharp is probably the simplest dual axis I have seen, but if you want a 3 axis sensor, look at this:

http://www.parallax.com/detail.asp?product_id=28026

It sells mounted on a standard PCB for $39.

[Guest]

ooohhhhh... very nice!

[noDNA]

Yes, nice but it gives x/y rotation and z acceleration only.

If you need direction you must use a compass module, I was not able to find an integrated affordable solution. Bought nearly every module from Sparkfun.com but did not work, bought Honeywell and motorola, did not work either. No rotation. Has anyone a cheap solution for 1 degree resolution 360 degree orientation?
regards
noDNA

[inaki]

Have you tried this one, it is only compass but it works:

http://www.robot-electronics.co.uk/shop ... 032004.htm

The bad side it is affected by nearby metallic bodies.

Resolution: 0.1 degrees. Accuracy: 3 deg.

[Pev]

Have you tried this one, it is only compass but it works:

http://www.robot-electronics.co.uk/shop ... 032004.htm

The bad side it is affected by nearby metallic bodies.

Resolution: 0.1 degrees. Accuracy: 3 deg.

Am currently using one for directional information on a tracked bot. Has been interesting to say the least and I would strongly recommend that you calibrate it to make it work accurately

Pev

[tempusmaster]

Have you tried this one, it is only compass but it works:

http://www.robot-electronics.co.uk/shop ... 032004.htm

The bad side it is affected by nearby metallic bodies.

Resolution: 0.1 degrees. Accuracy: 3 deg.

Am currently using one for directional information on a tracked bot. Has been interesting to say the least and I would strongly recommend that you calibrate it to make it work accurately

Pev

Calibration seems to be absolutely critical. For example, there were several autonomous events on the schedule during the August ROBO-ONE Special competition.

For the Sprint, you had to lay the robot down in a prone position facing away from the course. It had to stand up, turn around, and race down the course as quickly as possible.

For the Ball competition, also autonomous, the robots had to pick up a ball from the end of a stick, turn around, take a couple of steps forward, then try to hit the center of the target.

Several of the robots used compass sensors with varying degrees of success. The one that did the best at it was Pento. The sensor appears to be designed into the top of the robots head, and the operator spent quite a bit of time adjusting it and calibrating before each competition. The extra care and time really paid off. Pento ended up coming in 2nd place in both events. It would have won the sprint since it was dead on target, but was just a little too slow at walking/running.