Measuring distances with Sharp GP2Y0A02YK0F

Community Projects
1

Good afternoon,

I am working on an application on Labview where will be indicated the position varition of a metallic beam with an up to 20 Hz harmonic movement The project is just beginning and we dont know the exact type of sensor to be used. I think a IR reflective sensor like Sharp GP2Y0A02YK0F would be useful. This sensor will be positioned above the beam to catch the movement amplitude. It would be very nice if someone could express an opinion about the eficiency of this kind of sensor for this application, or indicate other sensor and ways for measuring. I am worried if a IR sensor is precise for the mentioned, because I need to get the graph on Labview.

Regards,

Gabriel Machado

2

How large is the predicted max displacement ? What resolution and accuracy is needed ? One problem I see is the measurement timing. The Sharp datasheet shows a nominal 38 msec between measurements. That’s only 26 Hz, barely above your 20 Hz motion. And there’s no mention of how the GP2Y0A02YK0F will possibly “smear” the measurement should there be motion during the 38 msec window.

http://en.wikipedia.org/wiki/Sampling_% … cessing%29

3

[GP2Y0A60SZ could give you faster sampling capability.](Pololu Carrier with Sharp/Socle GP2Y0A60SZLF Analog Distance Sensor 10-150cm, 5V)