What type of range (distance) measurement sensor (and/or sensor combinations 
to minimize the total cost) available with the following specs
    i. Range  : 1-25 meters
    ii.Accuracy : 2-5cm
    iii. Max spot size at target : 10cm radius @ 25m
    iv. Repetation rate : 10Hz
    v. Price : (Yes, I would prefer "low cost" whatever it means)

A tape measure

$10 from bunnings


"Ricardo Perezzo" <r...@rp.com.uk> wrote in message 
news:4323ea5b$0$19001$a...@news.optusnet.com.au...
> What type of range (distance) measurement sensor (and/or sensor combinations to 
> minimize the total cost) available with the following specs
>    i. Range  : 1-25 meters
>    ii.Accuracy : 2-5cm
>    iii. Max spot size at target : 10cm radius @ 25m
>    iv. Repetation rate : 10Hz
>    v. Price : (Yes, I would prefer "low cost" whatever it means)
>
>
>
> 

Ricardo Perezzo wrote:
> What type of range (distance) measurement sensor (and/or sensor combinations 
> to minimize the total cost) available with the following specs
>     i. Range  : 1-25 meters
>     ii.Accuracy : 2-5cm
>     iii. Max spot size at target : 10cm radius @ 25m
>     iv. Repetation rate : 10Hz
>     v. Price : (Yes, I would prefer "low cost" whatever it means)

If you could handle a much larger spot size, and possibly a lesser 
range, ultrasonic rangefinders are the cheapest option for long 
distances.  If the small spot size is required, then you might be stuck 
with pricey laser rangefinders that measure the round-trip travel time. 
  The Acuity AR4000 measures up to 16.5m and lists at $3500.  Similar 
products can be found elsewhere.

http://www.acuityresearch.com/products/index.shtml
http://www.astech.de/ENGLISH/ldm41a_e.htm

Later,
Daniel

"Ricardo Perezzo" <r...@rp.com.uk> wrote in message
news:4323ea5b$0$19001$a...@news.optusnet.com.au...
> What type of range (distance) measurement sensor (and/or sensor
combinations
> to minimize the total cost) available with the following specs
>     i. Range  : 1-25 meters
>     ii.Accuracy : 2-5cm
>     iii. Max spot size at target : 10cm radius @ 25m
>     iv. Repetation rate : 10Hz
>     v. Price : (Yes, I would prefer "low cost" whatever it means)
>
I bought one on sale at the local hardware warehouse for about $50 the other
day.

Ken

In article <4323f8c6$0$27926$5a62ac22@per-qv1-newsreader-
01.iinet.net.au>, noone@home says...
> A tape measure
> 
> $10 from bunnings
> 
> 
> "Ricardo Perezzo" <r...@rp.com.uk> wrote in message 
> news:4323ea5b$0$19001$a...@news.optusnet.com.au...
> > What type of range (distance) measurement sensor (and/or sensor combinations to 
> > minimize the total cost) available with the following specs
> >    i. Range  : 1-25 meters
> >    ii.Accuracy : 2-5cm
> >    iii. Max spot size at target : 10cm radius @ 25m
> >    iv. Repetation rate : 10Hz
> >    v. Price : (Yes, I would prefer "low cost" whatever it means)


You can get a 25m tape for that price?   Here in the US, for $10 you
would be lucky to get a good 25-foot tape.


Mark Borgerson

"Mark Borgerson" <mborgerson.at.comcast.net> wrote in message
news:M...@newsgroups.comcast.net...
> In article <4323f8c6$0$27926$5a62ac22@per-qv1-newsreader-
> 01.iinet.net.au>, noone@home says...
> > A tape measure
> >
> > $10 from bunnings
> >
> >
> > "Ricardo Perezzo" <r...@rp.com.uk> wrote in message
> > news:4323ea5b$0$19001$a...@news.optusnet.com.au...
> > > What type of range (distance) measurement sensor (and/or sensor
combinations to
> > > minimize the total cost) available with the following specs
> > >    i. Range  : 1-25 meters
> > >    ii.Accuracy : 2-5cm
> > >    iii. Max spot size at target : 10cm radius @ 25m
> > >    iv. Repetation rate : 10Hz
> > >    v. Price : (Yes, I would prefer "low cost" whatever it means)
>
>
> You can get a 25m tape for that price?   Here in the US, for $10 you
> would be lucky to get a good 25-foot tape.
>
>
> Mark Borgerson
>

See, if you went metric you'd get a 300% + improvement on things straight
away.....

Ken

"Ricardo Perezzo" <r...@rp.com.uk> wrote in message 
news:4323ea5b$0$19001$a...@news.optusnet.com.au...
> What type of range (distance) measurement sensor (and/or sensor 
> combinations to minimize the total cost) available with the following 
> specs
>    i. Range  : 1-25 meters
>    ii.Accuracy : 2-5cm
>    iii. Max spot size at target : 10cm radius @ 25m
>    iv. Repetation rate : 10Hz
>    v. Price : (Yes, I would prefer "low cost" whatever it means)
>
>
That sounds like a laser rangefinder to me. All you need is a laser diode 
and photodiode, possibly a reflector on the target coupled with some very 
fast pulse generating and measuring. Hope that helps with the homework.

Peter 

  Actually, most laser range finders use a phase measurement, rather
than actual flight time.  Leica Geosystems makes some fairly lowcost
laser distance meters, around $800 if I recall correctly.
[http://www.leica-geosystems.com/]

c...@yahoo.com wrote:
>   Actually, most laser range finders use a phase measurement, rather
> than actual flight time.  Leica Geosystems makes some fairly lowcost
> laser distance meters, around $800 if I recall correctly.
> [http://www.leica-geosystems.com/]

Thanks for the link.  The Disto Lite is only $330 (at lascolaser.com) 
and measures up to 200m with 3mm accuracy.  Their higher-end units have 
bluetooth for wireless data transfer.  If I only had a reason to buy 
one; they look neat.

Daniel

> Thanks for the link.  The Disto Lite is only $330 (at lascolaser.com) and 
> measures up to 200m with 3mm accuracy.  Their higher-end units have 
> bluetooth for wireless data transfer.  If I only had a reason to buy one; 
> they look neat.
>
> Daniel

Does Disto Lite has any computer interface such as RS232?