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Position measurement.

  • Thread starter Dirk Bruere at Neopax
  • Start date
D

Dirk Bruere at Neopax

Jan 1, 1970
0
Phil said:
"Dirk Bruere at Neopax"





** Makes no difference to the FACTS of the matter:


"Dirk Bruere at Neopax" is yet another time wasting,

publicly masturbating AUDIOPHOOL TROLL !!!!!


PISS THE HELL OFF - DICKHEAD !!




........... Phil

OOOH! OOOOH! Make me!
[Meanwhile, see a shrink]]

--
Dirk

The Consensus:-
The political party for the new millenium
http://www.theconsensus.org
 
D

Dirk Bruere at Neopax

Jan 1, 1970
0
Dirk said:
Phil said:
"Dirk Bruere at Neopax"






** Makes no difference to the FACTS of the matter:


"Dirk Bruere at Neopax" is yet another time wasting,

publicly masturbating AUDIOPHOOL TROLL !!!!!


PISS THE HELL OFF - DICKHEAD !!




........... Phil


OOOH! OOOOH! Make me!
[Meanwhile, see a shrink]]

Which reminds me - I've seen some nice circuits I can rip off, like a handy fast
audio peak limiter. Ah.. to aspire to the heights of a Behringer...

--
Dirk

The Consensus:-
The political party for the new millenium
http://www.theconsensus.org
 
P

Phil Allison

Jan 1, 1970
0
"Dick Bruere at Neopax"

Which reminds me - I've seen some nice circuits I can rip off,



** Plagiarism WOULD be about the only thing a fucking pile of shit like
"Dick Bruere at Neopax" could ever manage.

Spends too much of his time pulling on his tiny DICK in public to do any
real design engineering.





........ Phil
 
D

Dirk Bruere at Neopax

Jan 1, 1970
0
Phil said:
"Dick Bruere at Neopax"







** Plagiarism WOULD be about the only thing a fucking pile of shit like
"Dick Bruere at Neopax" could ever manage.

Spends too much of his time pulling on his tiny DICK in public to do any
real design engineering.

I guess that POS terminal I designed for Checkout Ltd was all a dream...
Not to mention the paintshop computer I designed for ICI, and the phone line
tracer I designed for BT and...

BTY, do you know Paul Dobson?

--
Dirk

The Consensus:-
The political party for the new millenium
http://www.theconsensus.org
 
P

Phil Allison

Jan 1, 1970
0
"Dick Bruere at Neopax"
BTY, do you know Paul Dobson?



** A criminal charlatan by all accounts.

You make a " nice" team.





......... Phil
 
D

Dirk Bruere at Neopax

Jan 1, 1970
0
Phil said:
"Dick Bruere at Neopax"






** A criminal charlatan by all accounts.

Now *that* sounds like libel Phil - I'm serious.
You want your account pulled?
You make a " nice" team.

We do at that.
For those who do not know the name, Paul Dobson was the founder of Studiomaster
and took it to No 2 ranking in the world behind Yamaha. Specialised in studio
equipment, as the name suggests.

--
Dirk

The Consensus:-
The political party for the new millenium
http://www.theconsensus.org
 
P

Phil Allison

Jan 1, 1970
0
"Dirk Bruere at Neopax"
Now *that* sounds like libel Phil - I'm serious.


** ROTFLMAO !!!

The only "serious" thing about *Dirk the Dickhead* is how fucking naive
the cretin is.

You want your account pulled?


** Please stop - my side are aching right now !!!!

We do at that.


** You bet.

Partners in crime.

For those who do not know the name, Paul Dobson was the founder of
Studiomaster and took it to No 2 ranking in the world behind Yamaha.


** What a FUCKING INSANE lie !!!!!!!

"Studiomaster" ( aka RSD) only made only cheap audio junk for bottom
feeders.

Specialised in studio equipment, as the name suggests.


** Another FUCKING insane lie !!!!!

They made ( and still make) cheap audio desks and powered mixers for pommy
DJs & *garage* bands.

http://www.studiomaster.com/history.html





......... Phil
 
D

Dirk Bruere at Neopax

Jan 1, 1970
0
Phil said:
"Dirk Bruere at Neopax"




** ROTFLMAO !!!

The only "serious" thing about *Dirk the Dickhead* is how fucking naive
the cretin is.






** Please stop - my side are aching right now !!!!






** You bet.

Partners in crime.






** What a FUCKING INSANE lie !!!!!!!

"Studiomaster" ( aka RSD) only made only cheap audio junk for bottom
feeders.






** Another FUCKING insane lie !!!!!

They made ( and still make) cheap audio desks and powered mixers for pommy
DJs & *garage* bands.

http://www.studiomaster.com/history.html

Since Paul sold the business it has gone bust at least once and been
resurrected. At its height, when Paul was in charge in the mid 80s when he sold
it (IIRC) it was turning over some $20m per year with a very healthy profit.

Time to do it again.
Ask Pooh Bear, who used to work for him and designed some of the eqipment back then.

--
Dirk

The Consensus:-
The political party for the new millenium
http://www.theconsensus.org
 
B

budgie

Jan 1, 1970
0
On Sat, 04 Feb 2006 03:21:01 +0000, Dirk Bruere at Neopax

FFS Dirk, do what nearly everbody else does with that twit - IGNORE HIM. That's
what killfiles are for.
 
D

Dirk Bruere at Neopax

Jan 1, 1970
0
budgie said:
On Sat, 04 Feb 2006 03:21:01 +0000, Dirk Bruere at Neopax

FFS Dirk, do what nearly everbody else does with that twit - IGNORE HIM. That's
what killfiles are for.

I rather like winding him up.
It's 04:05am here and I'm slightly bored, although I am watching a Roger Penrose
lecture from Princeton across the Net. I also have to write a brief summary of
media PC configuration options.

--
Dirk

The Consensus:-
The political party for the new millenium
http://www.theconsensus.org
 
S

Sjouke Burry

Jan 1, 1970
0
Dirk said:
I'm looking for a small(ish) non contact solution to measure an
oscillating surface to within a few tens of microns over a stroke of
some 50mm at a frequency of around 100Hz. I need to take measurements at
100uS intervals. Any ideas? Cost as always is a factor so anything under
(say) $300 in mass production...
Cant say if it works for you but I used a tv camera
as a microscope(reversed lens,10cm away from camera)
to measure vibration amplitude.Worked like a charm.
 
P

Phil Allison

Jan 1, 1970
0
"budgie"


** Budgie is a fuckwit electrician.




......... Phil
 
P

Phil Allison

Jan 1, 1970
0
"Dickhead Bruere at Neopax"



** Dirk the Dickhead is now a usenet Zombie.

Dead - but just won't lie down.




.......... Phil
 
D

Dirk Bruere at Neopax

Jan 1, 1970
0
Phil said:
"Dickhead Bruere at Neopax"



** Dirk the Dickhead is now a usenet Zombie.

Dead - but just won't lie down.

Of course not - I've got money to make!
Meanwhile, don't you need to patch the roof on your trailer?

--
Dirk

The Consensus:-
The political party for the new millenium
http://www.theconsensus.org
 
R

Rob

Jan 1, 1970
0
Dirk Bruere at Neopax said:
Of course not - I've got money to make!
Meanwhile, don't you need to patch the roof on your trailer?

I think that's the Landlords responsibility
 
W

Wieslaw Bicz

Jan 1, 1970
0
Dirk said:
I'm looking for a small(ish) non contact solution to measure an
oscillating surface to within a few tens of microns over a stroke of
some 50mm at a frequency of around 100Hz. I need to take measurements
at 100uS intervals. Any ideas? Cost as always is a factor so anything
under (say) $300 in mass production...

I would suggest to use ultrasonic interferometry. We have made such
devices (see here: http://www.optel.pl/manual/english/vibration.htm) for
vibration measurement, but distance measurement with such precision is
possible too. Accuracy is achievable, measurement can be continuous,
300$ if mass produced no problem.

If interested, we can develop such device.

Wieslaw Bicz

---------------========== OPTEL sp. z o.o. ===========---------------
------===== R&D: Ultrasonic Technology/Fingerprint Recognition ====------
ul. Otwarta 10a PL 50-212 Wroclaw Tel.:+48 71 3296854 Fax.:+48 71 3296852
--------==== mailto:[email protected] -=- http://www.optel.pl ====-------
 
J

Joseph2k

Jan 1, 1970
0
Dirk said:
I'm thinking of that.
Maybe some kind of interferometer setup with either fringe counting or
convert the fringe rate to a velocity measurement.
Collimated laser, reflector at a small angle to normal, small inexpensive
linear sensor and voila. Reasonably easy to calibrate for various ranges
of motion from 10 mm to at least 1 m, and 1 part in 4096 resolution and
accuracy.
 
Wieslaw said:
I would suggest to use ultrasonic interferometry. We have made such
devices (see here: http://www.optel.pl/manual/english/vibration.htm) for
vibration measurement, but distance measurement with such precision is
possible too. Accuracy is achievable, measurement can be continuous,
300$ if mass produced no problem.

If interested, we can develop such device.

IIRR Polaroid used an ultrasonic distance measurement in the autofocus
system for their Swinger camera. More recently, you could buy
"ultrasonic tape measures" that were useful for getting rough room
dimensions quickly.

As far as I know these depended on sending out a brief pulse and
detecting the echo. The speed of sound in air at 20C is 343.4 m/sec, so
for a 50mm maximum range the go and return time is 290usec. If you use
separate transmit and receive elements, you could send out a suitably
long pseudo-random binary sequence and track the correlation between
the transmitted and received signal, which could let you sample faster
- probably beyond the once every 100usec being asked for.
 
S

Spehro Pefhany

Jan 1, 1970
0
IIRR Polaroid used an ultrasonic distance measurement in the autofocus
system for their Swinger camera. More recently, you could buy
"ultrasonic tape measures" that were useful for getting rough room
dimensions quickly.

As far as I know these depended on sending out a brief pulse and
detecting the echo. The speed of sound in air at 20C is 343.4 m/sec, so
for a 50mm maximum range the go and return time is 290usec. If you use
separate transmit and receive elements, you could send out a suitably
long pseudo-random binary sequence and track the correlation between
the transmitted and received signal, which could let you sample faster
- probably beyond the once every 100usec being asked for.


Wouldn't the typical electrostatic transducer bandwidth be a couple
orders of magnitude too small?


Best regards,
Spehro Pefhany
 
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