servo with Sharp IR distance as tracking

robban35

Hi!

i am trying to make a sharp IR distance sensor attached on a servo to track an object...

step 1:

move the servo as a scan from left to right. (this i have managed)

but the following .....

if an object is detected then start track

when an object is detected move the servo to the position were the object is..

erco

Your code...?

robban35

here´s my code....

' {$STAMP BS2}
i VAR Word
b VAR word
time VAR Word
go:
FOR i=1 TO 5
PULSOUT 6, 1 ' move the servo
GOSUB dis
IF time<100 THEN en
PAUSE 150
NEXT

st:

FOR i=1 TO 5
PULSOUT 6,1300
IF time<100 THEN en
GOSUB dis
PAUSE 150
NEXT
GOTO go


dis:
HIGH 10
PAUSE 1
RCTIME 10,1,time
DEBUG DEC time,CR
IF time<100 THEN en
RETURN

en:
DEBUG "Target",CR
GOSUB track
RETURN

track:
FOR i=1 TO 1
IF time>500 THEN forward
IF time<500 THEN revers
PULSOUT 6, (b) ' move the servo
GOSUB dis
PAUSE 300
NEXT
RETURN

FORward:
b=B+1
RETURN
revers:
b=B-1
RETURN

NWCCTV

You would not by chance be working on this for a camera setup, would you? I believe I have a post or two somewhere on this or possibly another forum on that very issue. I will see if I can dig it up and will post when I find it.

erco

Tracking using one distance-measuring sensor on the tracking servo will be problematic. You can know if an object is detected, but when it moves, you don't know which way it moved, so you will end up hunting randomly for it.

If you had one or more stationary sensors in the cam's field of view, you could use that dats to aim your cam.

NWCCTV

If this is in fact for a ccamera, another way would be to somehow tap in to the camera or software motion detection.

NWCCTV

Another issue to consider is how far away will objects be when tracking. If you placed multiple senors in a circle you could program possibly for nearby, but if you go too far out what happens when the servo is moving and suddenly detects another object????