Sensor suggestions?
Archiver
Posts: 46,084
I have an application to determine what types of fragrances attract the
most flying insects. I'll have many of these fragrance "traps" set up in
the field, each with a stamp that will maintain a count of how many
insects enter (and exit) over a period of time. That stamp will update
an lcd counter display so that a field rep can go to each site and just
record the number showing.
Here's how a "trap" would work:
I have a large box with an 16"x16" square opening cut in it. Inside is a
fragrance to attract flying insects. I will use a stamp to "capture" a
pulse from a sensor that triggers every time an insect enters or leaves
the "trap" thru the window. For simplicities sake let's say I divide the
number of pulses by two to signify an entry and exit. What I need is to
figure out what kind of sensor I can use to determine when an insect
flies thru the window. In reality I would like to have two sensors so
that I could determine which direction the insect was flying, in or out
of the "trap" so that I only count entries into the trap.
Any suggestions as to a sensor that might work?
Thanks, Ray
most flying insects. I'll have many of these fragrance "traps" set up in
the field, each with a stamp that will maintain a count of how many
insects enter (and exit) over a period of time. That stamp will update
an lcd counter display so that a field rep can go to each site and just
record the number showing.
Here's how a "trap" would work:
I have a large box with an 16"x16" square opening cut in it. Inside is a
fragrance to attract flying insects. I will use a stamp to "capture" a
pulse from a sensor that triggers every time an insect enters or leaves
the "trap" thru the window. For simplicities sake let's say I divide the
number of pulses by two to signify an entry and exit. What I need is to
figure out what kind of sensor I can use to determine when an insect
flies thru the window. In reality I would like to have two sensors so
that I could determine which direction the insect was flying, in or out
of the "trap" so that I only count entries into the trap.
Any suggestions as to a sensor that might work?
Thanks, Ray
Comments
I would say your box should be about twice as long as it is wide or high,
and then you could use ultrasound transducers (SRF04 Sonar Rangers,
probably). Space them far enough apart down the throat of the trap (its
length) with the bait at the end, so that they are nearly certain to fly
past both transducers, set the transducers for minimum gain to just reach
all the way accross the throat, and space far enough apart to ensure a dead
band between, and you have a bi-directional traffic counting gate. You might
have to add a baffle or two between the transducers to ensure the dead band,
but if the scent gets out to the bugs, the bafles won't stop the bugs from
coming in.
And by the way, count divide by two won't work unless you are absolutely
certain no bug enters and dies. Given the short life spans of most bugs,
that seems to be very unlikely. Then count divide by two either yields a
fractional bug, or two dead bugs get counted as one. If you use the two
sensors arrangement, you should be able to program your bs2's to keep an
increment one way-decrement the other way loop going, with the total number
of matching pairs equalling the total number of bugs that survived the trip.
For any non-matches, you look at direction. Out only is either a leak in
your trap or a false trigger, while in only has to match a dead bug in the
trap, or be either a leak or a false trigger. Gives you some checks and
balances for quality of data, for a very low price.
Mike
Original Message
From: Ray V. <w2ec@a...>
To: <basicstamps@yahoogroups.com>
Sent: Friday, May 09, 2003 11:10 PM
Subject: [noparse][[/noparse]basicstamps] Sensor suggestions?
> I have an application to determine what types of fragrances attract the
> most flying insects. I'll have many of these fragrance "traps" set up in
> the field, each with a stamp that will maintain a count of how many
> insects enter (and exit) over a period of time. That stamp will update
> an lcd counter display so that a field rep can go to each site and just
> record the number showing.
>
> Here's how a "trap" would work:
>
> I have a large box with an 16"x16" square opening cut in it. Inside is a
> fragrance to attract flying insects. I will use a stamp to "capture" a
> pulse from a sensor that triggers every time an insect enters or leaves
> the "trap" thru the window. For simplicities sake let's say I divide the
> number of pulses by two to signify an entry and exit. What I need is to
> figure out what kind of sensor I can use to determine when an insect
> flies thru the window. In reality I would like to have two sensors so
> that I could determine which direction the insect was flying, in or out
> of the "trap" so that I only count entries into the trap.
>
> Any suggestions as to a sensor that might work?
>
> Thanks, Ray
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
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Body of the message will be ignored.
>
>
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>
>
>
it would prevent one critter from coming and going repeatedly and
messing up the real count, and you could get an idea of the variety
and species that were interested.
and if you are testing for mosquitoes, you are welcome to test on my
back porch, if you zap them that is.
Dave
--- In basicstamps@yahoogroups.com, "Ray V." <w2ec@a...> wrote:
> I have an application to determine what types of fragrances attract
the
> most flying insects. I'll have many of these fragrance "traps" set
up in
> the field, each with a stamp that will maintain a count of how many
> insects enter (and exit) over a period of time. That stamp will
update
> an lcd counter display so that a field rep can go to each site and
just
> record the number showing.
>
> Here's how a "trap" would work:
>
> I have a large box with an 16"x16" square opening cut in it. Inside
is a
> fragrance to attract flying insects. I will use a stamp
to "capture" a
> pulse from a sensor that triggers every time an insect enters or
leaves
> the "trap" thru the window. For simplicities sake let's say I
divide the
> number of pulses by two to signify an entry and exit. What I need
is to
> figure out what kind of sensor I can use to determine when an
insect
> flies thru the window. In reality I would like to have two sensors
so
> that I could determine which direction the insect was flying, in or
out
> of the "trap" so that I only count entries into the trap.
>
> Any suggestions as to a sensor that might work?
>
> Thanks, Ray
There not nats are they
one Ir led modulated at 40 khz with a row of Radio shack ir receivers in
parallel metal can type also 40khz any one goes off and you get a signal no
need to find what direction divide by 2 less the ones left inside.
Larry Gaminde
Original Message
From: "Dave Mucha" <davemucha@j...>
To: <basicstamps@yahoogroups.com>
Sent: May 09, 2003 9:21 PM
Subject: [noparse][[/noparse]basicstamps] Re: Sensor suggestions?
> I guess zapping them and counting the high voltage spikes is out ?
>
> it would prevent one critter from coming and going repeatedly and
> messing up the real count, and you could get an idea of the variety
> and species that were interested.
>
> and if you are testing for mosquitoes, you are welcome to test on my
> back porch, if you zap them that is.
>
> Dave
>
>
>
> --- In basicstamps@yahoogroups.com, "Ray V." <w2ec@a...> wrote:
> > I have an application to determine what types of fragrances attract
> the
> > most flying insects. I'll have many of these fragrance "traps" set
> up in
> > the field, each with a stamp that will maintain a count of how many
> > insects enter (and exit) over a period of time. That stamp will
> update
> > an lcd counter display so that a field rep can go to each site and
> just
> > record the number showing.
> >
> > Here's how a "trap" would work:
> >
> > I have a large box with an 16"x16" square opening cut in it. Inside
> is a
> > fragrance to attract flying insects. I will use a stamp
> to "capture" a
> > pulse from a sensor that triggers every time an insect enters or
> leaves
> > the "trap" thru the window. For simplicities sake let's say I
> divide the
> > number of pulses by two to signify an entry and exit. What I need
> is to
> > figure out what kind of sensor I can use to determine when an
> insect
> > flies thru the window. In reality I would like to have two sensors
> so
> > that I could determine which direction the insect was flying, in or
> out
> > of the "trap" so that I only count entries into the trap.
> >
> > Any suggestions as to a sensor that might work?
> >
> > Thanks, Ray
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the Subject and
Body of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
Neat project. IR sensors are the first that spring to my mind. Does the
opening have any depth to it, or just the thickness of the box? Seems as if
that would make it hard to put two sensors to determine direction of travel.
As well, since more than one insect may well enter at a time, you might have
data discrepancies. What size resolution on the bugs do you want? I have
detected fairly small moving objects with IR, such as a metal slug 4mm by
4mm moving pretty fast, 45 meters per second or so, but I have no data on
how small a object can be reliably detected.
Another possibility would be sound. This would probably be more sensitive,
but more problematic in terms of how directional the sensor is and how
susceptible to background noise.
Just some thoughts,
Jonathan
www.madlabs.info
Original Message
From: "Ray V." <w2ec@a...>
To: <basicstamps@yahoogroups.com>
Sent: Friday, May 09, 2003 8:10 PM
Subject: [noparse][[/noparse]basicstamps] Sensor suggestions?
> I have an application to determine what types of fragrances attract the
> most flying insects. I'll have many of these fragrance "traps" set up in
> the field, each with a stamp that will maintain a count of how many
> insects enter (and exit) over a period of time. That stamp will update
> an lcd counter display so that a field rep can go to each site and just
> record the number showing.
>
> Here's how a "trap" would work:
>
> I have a large box with an 16"x16" square opening cut in it. Inside is a
> fragrance to attract flying insects. I will use a stamp to "capture" a
> pulse from a sensor that triggers every time an insect enters or leaves
> the "trap" thru the window. For simplicities sake let's say I divide the
> number of pulses by two to signify an entry and exit. What I need is to
> figure out what kind of sensor I can use to determine when an insect
> flies thru the window. In reality I would like to have two sensors so
> that I could determine which direction the insect was flying, in or out
> of the "trap" so that I only count entries into the trap.
>
> Any suggestions as to a sensor that might work?
>
> Thanks, Ray
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the Subject and
Body of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>
>
Oddly enough, when I was trying to develop a short distance
data transmitter (5ft) using an ultrasonic transmitter/receiver
years ago, I discovered that "some" insects were attracted to
my continuous (40kHz) transmitter. I discovered this when I
was working on the audible (40kHz divide by 10) receiver and
thought it was malfunctioning as I was hearing "other" unexpected
sounds. When I turned off the transmitter, it turns out my
receiver became an insect locating device. Keep in mind I was
working in a shed in the backyard in the middle of August, so
there were many BUGS. (grin)
Anyway using ultra-sonic may bias Ray's results, if he is
transmitting. However as a listening device it might be doable.
There might also be biasing with using IR if some insects are
attracted to that form of light as well, although this would
be my first attempt. Here's my thought... If you had a container
containing the fragrance with a small pin-hole at each location
you also placed an IR sensor, over a period of time you could
build a histogram of how many sensors were covered (by the insect)
investigating each fragrance.
>Ray
>
>I would say your box should be about twice as long as it is wide or high,
>and then you could use ultrasound transducers (SRF04 Sonar Rangers,
>probably). Space them far enough apart down the throat of the trap (its
>length) with the bait at the end, so that they are nearly certain to fly
>past both transducers, set the transducers for minimum gain to just reach
>all the way accross the throat, and space far enough apart to ensure a dead
>band between, and you have a bi-directional traffic counting gate. You might
>have to add a baffle or two between the transducers to ensure the dead band,
>but if the scent gets out to the bugs, the bafles won't stop the bugs from
>coming in.
>
>And by the way, count divide by two won't work unless you are absolutely
>certain no bug enters and dies. Given the short life spans of most bugs,
>that seems to be very unlikely. Then count divide by two either yields a
>fractional bug, or two dead bugs get counted as one. If you use the two
>sensors arrangement, you should be able to program your bs2's to keep an
>increment one way-decrement the other way loop going, with the total number
>of matching pairs equalling the total number of bugs that survived the trip.
>For any non-matches, you look at direction. Out only is either a leak in
>your trap or a false trigger, while in only has to match a dead bug in the
>trap, or be either a leak or a false trigger. Gives you some checks and
>balances for quality of data, for a very low price.
>
>Mike
>
>
Original Message
>From: Ray V. <w2ec@a...>
>To: <basicstamps@yahoogroups.com>
>Sent: Friday, May 09, 2003 11:10 PM
>Subject: [noparse][[/noparse]basicstamps] Sensor suggestions?
>
>
> > I have an application to determine what types of fragrances attract the
> > most flying insects. I'll have many of these fragrance "traps" set up in
> > the field, each with a stamp that will maintain a count of how many
> > insects enter (and exit) over a period of time. That stamp will update
> > an lcd counter display so that a field rep can go to each site and just
> > record the number showing.
> >
> > Here's how a "trap" would work:
> >
> > I have a large box with an 16"x16" square opening cut in it. Inside is a
> > fragrance to attract flying insects. I will use a stamp to "capture" a
> > pulse from a sensor that triggers every time an insect enters or leaves
> > the "trap" thru the window. For simplicities sake let's say I divide the
> > number of pulses by two to signify an entry and exit. What I need is to
> > figure out what kind of sensor I can use to determine when an insect
> > flies thru the window. In reality I would like to have two sensors so
> > that I could determine which direction the insect was flying, in or out
> > of the "trap" so that I only count entries into the trap.
> >
> > Any suggestions as to a sensor that might work?
> >
> > Thanks, Ray
> >
> >
> > To UNSUBSCRIBE, just send mail to:
> > basicstamps-unsubscribe@yahoogroups.com
> > from the same email address that you subscribed. Text in the Subject and
>Body of the message will be ignored.
> >
> >
> > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
> >
> >
> >
>
>
>
>To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
>from the same email address that you subscribed. Text in the Subject and
>Body of the message will be ignored.
>
>
>Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
(moths particularly) are repelled by certain frequencies/patterns to
avoid being lunch for echo-locating bats. A related fascinating
survival story is that of a parasitic mite that burrows into one inner
ear of a certain moth species, slowly destroying hearing in that ear.
But you never find mites burrowing into BOTH ears of the same moth. If
both moth ears are destroyed, the moth can't hear the oncoming bat, and
take evasive action.
Dennis
Original Message
From: Beau Schwabe [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=Suk86daa91x0jzTLIJcUW_7qIq8TAw19smnBSIKmNG8dtsJB45gJ0-rqvijUu6vE8LilE8ufnUQfgltcEY9S]bschwabe@a...[/url
Sent: Saturday, May 10, 2003 12:42 PM
To: basicstamps@yahoogroups.com
Subject: Re: [noparse][[/noparse]basicstamps] Sensor suggestions?
Mike/Ray,
Oddly enough, when I was trying to develop a short distance
data transmitter (5ft) using an ultrasonic transmitter/receiver
years ago, I discovered that "some" insects were attracted to
my continuous (40kHz) transmitter. I discovered this when I
was working on the audible (40kHz divide by 10) receiver and
thought it was malfunctioning as I was hearing "other"
unexpected
sounds. When I turned off the transmitter, it turns out my
receiver became an insect locating device. Keep in mind I was
working in a shed in the backyard in the middle of August, so
there were many BUGS. (grin)
Anyway using ultra-sonic may bias Ray's results, if he is
transmitting. However as a listening device it might be
doable.
There might also be biasing with using IR if some insects are
attracted to that form of light as well, although this would
be my first attempt. Here's my thought... If you had a
container
containing the fragrance with a small pin-hole at each location
you also placed an IR sensor, over a period of time you could
build a histogram of how many sensors were covered (by the
insect)
investigating each fragrance.
bats eat them right away?
Couldn't resist.
-John
At 04:21 PM 5/10/2003 -0700, you wrote:
>Beau is correct that some insects are attracted to ultrasonics. Others
>(moths particularly) are repelled by certain frequencies/patterns to
>avoid being lunch for echo-locating bats. A related fascinating
>survival story is that of a parasitic mite that burrows into one inner
>ear of a certain moth species, slowly destroying hearing in that ear.
>But you never find mites burrowing into BOTH ears of the same moth. If
>both moth ears are destroyed, the moth can't hear the oncoming bat, and
>take evasive action.
>
>Dennis
>
>
Original Message
>From: Beau Schwabe [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=89SLPbgevKmCkoLS8CDMCxAm4QmalXnz-2ESQpA271aP1MzVJ85Vi8-28qta-2b_u2yyUj37x9szSE4vIJP33Do]bschwabe@a...[/url
>Sent: Saturday, May 10, 2003 12:42 PM
>To: basicstamps@yahoogroups.com
>Subject: Re: [noparse][[/noparse]basicstamps] Sensor suggestions?
>
>
>Mike/Ray,
>
> Oddly enough, when I was trying to develop a short distance
> data transmitter (5ft) using an ultrasonic transmitter/receiver
> years ago, I discovered that "some" insects were attracted to
> my continuous (40kHz) transmitter. I discovered this when I
> was working on the audible (40kHz divide by 10) receiver and
> thought it was malfunctioning as I was hearing "other"
>unexpected
> sounds. When I turned off the transmitter, it turns out my
> receiver became an insect locating device. Keep in mind I was
> working in a shed in the backyard in the middle of August, so
> there were many BUGS. (grin)
>
> Anyway using ultra-sonic may bias Ray's results, if he is
> transmitting. However as a listening device it might be
>doable.
>
> There might also be biasing with using IR if some insects are
> attracted to that form of light as well, although this would
> be my first attempt. Here's my thought... If you had a
>container
> containing the fragrance with a small pin-hole at each location
> you also placed an IR sensor, over a period of time you could
> build a histogram of how many sensors were covered (by the
>insect)
> investigating each fragrance.
>
>
>
>
>
>
>To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
>from the same email address that you subscribed. Text in the Subject and
>Body of the message will be ignored.
>
>
>Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
--Dennis
Original Message
From: John Walton [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=vya5m2dErz0HM-nINWl5570IQxU-zW05hFFgeCeOusuPTypv1s9XuVuY3T0kbTPP1vnDSy4LOETnYw]john@l...[/url
Sent: Saturday, May 10, 2003 7:53 PM
To: basicstamps@yahoogroups.com
Subject: RE: [noparse][[/noparse]basicstamps] Sensor suggestions?
Maybe you never find them burrowing into both ears because if they do
the
bats eat them right away?
Couldn't resist.
-John
At 04:21 PM 5/10/2003 -0700, you wrote:
>Beau is correct that some insects are attracted to ultrasonics. Others
>(moths particularly) are repelled by certain frequencies/patterns to
>avoid being lunch for echo-locating bats. A related fascinating
>survival story is that of a parasitic mite that burrows into one inner
>ear of a certain moth species, slowly destroying hearing in that ear.
>But you never find mites burrowing into BOTH ears of the same moth. If
>both moth ears are destroyed, the moth can't hear the oncoming bat, and
>take evasive action.
>
>Dennis
>
>
Original Message
>From: Beau Schwabe [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=PoyQAZpZ6A0MJ2X0uoBWpUcl4mbJZS7_O_S1PEFQ37UyHiHoKxrqLv_O5rIbOb5gqHJtP4rbTN5PCXRFNNKKeWI]bschwabe@a...[/url
>Sent: Saturday, May 10, 2003 12:42 PM
>To: basicstamps@yahoogroups.com
>Subject: Re: [noparse][[/noparse]basicstamps] Sensor suggestions?
>
>
>Mike/Ray,
>
> Oddly enough, when I was trying to develop a short distance
> data transmitter (5ft) using an ultrasonic
transmitter/receiver
> years ago, I discovered that "some" insects were attracted
to
> my continuous (40kHz) transmitter. I discovered this when I
> was working on the audible (40kHz divide by 10) receiver and
> thought it was malfunctioning as I was hearing "other"
>unexpected
> sounds. When I turned off the transmitter, it turns out my
> receiver became an insect locating device. Keep in mind I
was
> working in a shed in the backyard in the middle of August, so
> there were many BUGS. (grin)
>
> Anyway using ultra-sonic may bias Ray's results, if he is
> transmitting. However as a listening device it might be
>doable.
>
> There might also be biasing with using IR if some insects are
> attracted to that form of light as well, although this would
> be my first attempt. Here's my thought... If you had a
>container
> containing the fragrance with a small pin-hole at each
location
> you also placed an IR sensor, over a period of time you
could
> build a histogram of how many sensors were covered (by the
>insect)
> investigating each fragrance.
>
>
>
>
>
>
>To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
>from the same email address that you subscribed. Text in the Subject
>and
>Body of the message will be ignored.
>
>
>Your use of Yahoo! Groups is subject to
>http://docs.yahoo.com/info/terms/
To UNSUBSCRIBE, just send mail to:
basicstamps-unsubscribe@yahoogroups.com
from the same email address that you subscribed. Text in the Subject
and Body of the message will be ignored.
Your use of Yahoo! Groups is subject to
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coprocessors and low cost video cameras. Store frames at low
resolution, such as 128 x 128, and about 5 frames per second. Scan each
video frame buffer until 2 or more frames are not identical. Identify
size and direction of the incoming object. If it looks like a bug, and
flies like a bug ...
Dennis
Original Message
From: Ray V. [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=0aR4BH2Pp-YIT_R-8XX_rdxYRek2KM04XfS91l7-Mnf0h0AMG1U_t9xgiVNRuwV3pufcx4jL]w2ec@a...[/url
Sent: Friday, May 09, 2003 8:10 PM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] Sensor suggestions?
I have an application to determine what types of fragrances attract the
most flying insects. I'll have many of these fragrance "traps" set up in
the field, each with a stamp that will maintain a count of how many
insects enter (and exit) over a period of time. That stamp will update
an lcd counter display so that a field rep can go to each site and just
record the number showing.
Here's how a "trap" would work:
I have a large box with an 16"x16" square opening cut in it. Inside is a
fragrance to attract flying insects. I will use a stamp to "capture" a
pulse from a sensor that triggers every time an insect enters or leaves
the "trap" thru the window. For simplicities sake let's say I divide the
number of pulses by two to signify an entry and exit. What I need is to
figure out what kind of sensor I can use to determine when an insect
flies thru the window. In reality I would like to have two sensors so
that I could determine which direction the insect was flying, in or out
of the "trap" so that I only count entries into the trap.
Any suggestions as to a sensor that might work?
Thanks, Ray
To UNSUBSCRIBE, just send mail to:
basicstamps-unsubscribe@yahoogroups.com
from the same email address that you subscribed. Text in the Subject
and Body of the message will be ignored.
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On Sat, 10 May 2003 22:05:33 -0700 "Dennis O'Leary"
<doleary@e...> writes:
> This could be done with image processing, using one of the current
> video coprocessors and low cost video cameras. Store frames at low
> resolution, such as 128 x 128, and about 5 frames per second. Scan
> each video frame buffer until 2 or more frames are not identical.
> Identify size and direction of the incoming object.
________________________________________________________________
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has color and size tracking built in (just make the walls of the box
a distinct color and weight for any other color to pass by). I've
integrated it easily with the basic stamp for my robotics project,
just need to wire wrap three pins to the stamp (using a basicstamp2sx
because the cmu cams minimum baud rate is 9600, basic stamp 1 does
not go up to 9600). Make sure that where you are buying it from gives
you the premade camera! other robot contest teams ordered one and got
a bunch of parts!
--- In basicstamps@yahoogroups.com, AMG AMG <controlsdude2000@j...>
wrote:
> Do you have any links to these "coprocessors and low cost video
cameras"?
>
> On Sat, 10 May 2003 22:05:33 -0700 "Dennis O'Leary"
> <doleary@e...> writes:
> > This could be done with image processing, using one of the
current
> > video coprocessors and low cost video cameras. Store frames at
low
> > resolution, such as 128 x 128, and about 5 frames per second.
Scan
> > each video frame buffer until 2 or more frames are not
identical.
> > Identify size and direction of the incoming object.
>
> ________________________________________________________________
> The best thing to hit the internet in years - Juno SpeedBand!
> Surf the web up to FIVE TIMES FASTER!
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cam. For other cameras, check out the ads in Nuts 'N Volts, electronic
stores like Fry's, or for higher-end lens and camera selections, try
Marshall Electronics, www.mars-cam.com . If you need "machine vision"
level of support electronics, look at the "video processors chips"
available from Analog Devices, and TI/Burr Brown. Assembly line machine
vision requires good resolution, probably exceeding capabilities of a
single Stamp, but easily done with a MAPS system -- Massive Array of
Parallax Stamps [noparse]:)[/noparse] .
Dennis
Original Message
From: Sam [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=NCWNjuBBFmG6vzxUCL0kKZCDbXBNDvFmG3uJUTF5n9w2qNPF6ekBRlBgUhsDePHnNS4lVVzSg_aRlwQ]hard-on@t...[/url
Sent: Sunday, May 11, 2003 7:30 AM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] Re: Sensor suggestions?
check out the "CMU cam" (CMU means carnegie mellon U), its cheap and
has color and size tracking built in (just make the walls of the box
a distinct color and weight for any other color to pass by). I've
integrated it easily with the basic stamp for my robotics project,
just need to wire wrap three pins to the stamp (using a basicstamp2sx
because the cmu cams minimum baud rate is 9600, basic stamp 1 does
not go up to 9600). Make sure that where you are buying it from gives
you the premade camera! other robot contest teams ordered one and got
a bunch of parts!
--- In basicstamps@yahoogroups.com, AMG AMG <controlsdude2000@j...>
wrote:
> Do you have any links to these "coprocessors and low cost video
cameras"?
>
> On Sat, 10 May 2003 22:05:33 -0700 "Dennis O'Leary" <doleary@e...>
> writes:
> > This could be done with image processing, using one of the
current
> > video coprocessors and low cost video cameras. Store frames at
low
> > resolution, such as 128 x 128, and about 5 frames per second.
Scan
> > each video frame buffer until 2 or more frames are not
identical.
> > Identify size and direction of the incoming object.
>
> ________________________________________________________________
> The best thing to hit the internet in years - Juno SpeedBand! Surf the
> web up to FIVE TIMES FASTER! Only $14.95/ month - visit www.juno.com
> to sign up today!
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