Hello,
I try to use linux kernel module for proximity sensor SRF04 and i was not able to measure distance longer than 1.5 m. The problem is on implementation maximum range filter in function srf04_read, line 145. The reasoning assumes that the distance to 3 meters is limited, but the direction back and forth is neglected. Therefore, the resulting limit is a maximum of 1.5 meres and not a required 3 meters. The solution is to come out of the formula:
* distance 2 * 3 m
* time = ---------- = --------- = 18808777 ns
* speed 319 m/s
*
Best Regards,
Zbyněk Kocur
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email: zbynek.kocur@xxxxxxxxxxx
phone: +420 224 354 054
web: http://www.fel.cvut.cz
Department of Telecommunications Engineering
Faculty of Electrical Engineering
