Rangefinder using Arduino and Servo
2009
A Hokuyo Range sensor costs you $2000 and a cheapo SHARP IR sensor with a servo is $20, max!. The difference between them is probably only that the range sensor is more mechanically stable and hence faster. The range sensor that we hacked is actually an IR sensor pasted over a servo. And a servo is slower than a DC motor. But, in our project our range sensor is 100 times better because it is 100 times cheaper and more importantly 20 times lighter. It should serve us enough to find obstacles. We might later add 3 IR sensor on the servos to get more data.
Add pan tilt to the SHARP IR sensor and it becomes better than the Hokuyo Range sensor! More on that later…
Here is what we came up with…
Following is the raw data and the corresponding position data we got from this. The position data is not calibrated and hence the walls appear curved. The SHARP IR sensor has a non-linear curve. A good calibration article is on the Acroname website.
RAW Range Data
2D Range Data
