accurate sensor to measure distance 0cm - 100cm

[mcwee67]

Hello,

I'm a student doing my final year project on making a robot which can navigate through a corridor.

I have been using infrared sensors to measure distance but I got reading from all over the place.

I have looked at ultrasonic sensor for measurement, but can anybody recommended anything other sensor, I heard laser is good but extremely expensive to build...?

Thanks 

[Soeren]

Hi,

Sharp produces a range of IR sensors that's pretty good. Read on here http://www.acroname.com/robotics/info/articles/sharp/sharp.html

[mcwee67]

Hi,

Sharp produces a range of IR sensors that's pretty good. Read on here http://www.acroname.com/robotics/info/articles/sharp/sharp.html

Thanks...

I'm using one of the sharp sensor, but my problem is that it gives number of different reading...

I have run test of taking measurement of 100 at 15cm, 20cm, 25cm, 30cm etc... and the results have .0 of a change...

I've looked at ultrasonic... are they more accurate then infrared?

Thanks

[Soeren]

Hi,

I'm using one of the sharp sensor, but my problem is that it gives number of different reading...

I have run test of taking measurement of 100 at 15cm, 20cm, 25cm, 30cm etc... and the results have .0 of a change...

Then you did something wrong - they're very reliable.
Did you place a cap over the supply lines, directly at the sensor?

I've looked at ultrasonic... are they more accurate then infrared?

On the contrary.

[mcwee67]

Sorry what do you mean by "Did you place a cap over the supply lines, directly at the sensor"

How would I go about getting accurate measure from a sharp sensor?

Thanks

[Soeren]

Hi,

Sorry what do you mean by "Did you place a cap over the supply lines, directly at the sensor"

Excactly what I asked (cap = capacitor), what puzzles you  about it?
I take it that you didn't, so try that.

What model number is the Sharp sensor you used?

How would I go about getting accurate measure from a sharp sensor?

Apart from decoupling the supply lines by the cap, I'd just measure its output.