Accelerometer I dea Question
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Posts: 46,084
I am considering making a device that can measure 0-60 times, 1/4
mile times, etc for automobiles. This is going to be for my senior
project in electrical engineering. I am looking at the ADXL202
accelerometer from analog devices, and was considering using the
basic stamp. I am not sure if this combination will provide me with
the data I need. I was condiering just dumping the data to storage
and processing it later on. If anybody has and comments or ideas
please let me know.
Thanks
mile times, etc for automobiles. This is going to be for my senior
project in electrical engineering. I am looking at the ADXL202
accelerometer from analog devices, and was considering using the
basic stamp. I am not sure if this combination will provide me with
the data I need. I was condiering just dumping the data to storage
and processing it later on. If anybody has and comments or ideas
please let me know.
Thanks
Comments
ADXL202/ADXL210 with the Parallax Basic Stamp Module to speed algorithm
development. Also, see the device application notes for ideas regarding
calibration and filtering to minimize tilt sensitivity and optimize
linear acceleration sensitivity. The cool thing about this approach is
that it uses pulse width modulation, which doesn't require an A/D
converter chip.
Denni
Original Message
From: mhsneon [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=-m1bW87iMg6ZYXBRaHGENUN0SpWWmNPDzxpREBaaXT9HQWRGWuf5F1t455flKNXDzkhFaBwgs-g8Ve35]mhsneon@y...[/url
Sent: Saturday, January 19, 2002 4:19 PM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] Accelerometer I dea Question
I am considering making a device that can measure 0-60 times, 1/4
mile times, etc for automobiles. This is going to be for my senior
project in electrical engineering. I am looking at the ADXL202
accelerometer from analog devices, and was considering using the
basic stamp. I am not sure if this combination will provide me with
the data I need. I was condiering just dumping the data to storage
and processing it later on. If anybody has and comments or ideas
please let me know.
Thanks
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ADXL202 only measures up to 2G.
Hank
Original Message
From: "Dennis P. O'Leary" <doleary@h...>
To: <basicstamps@yahoogroups.com>
Sent: Saturday, January 19, 2002 7:31 PM
Subject: RE: [noparse][[/noparse]basicstamps] Accelerometer I dea Question
> Analog Devices web site has a relevant Techical Note: Using the
> ADXL202/ADXL210 with the Parallax Basic Stamp Module to speed algorithm
> development. Also, see the device application notes for ideas regarding
> calibration and filtering to minimize tilt sensitivity and optimize
> linear acceleration sensitivity. The cool thing about this approach is
> that it uses pulse width modulation, which doesn't require an A/D
> converter chip.
>
> Denni
>
http://www.analog.com/technology/mems/accelerometers/designTools/selec
tionGuides/products.html
at analog devices. They have a range of accelerometers. XL105 has a
+/- 5g range
--- In basicstamps@y..., "rcvehicles" <rcvehicles@y...> wrote:
> Does anyone know of an accelerometer that would measure from 0 to 5
G? The ADXL202 only measures up to 2G.
>
> Hank
>
of studying to do to trick the stamp into performing the math. I
don't have a floting point coprosser which would make it easier I
think. I am trying to register grade of climb and decent as well as
acceleration around tight fast turns. Will keep you posted of any
breakthroughs.
--- In basicstamps@y..., "mhsneon" <mhsneon@y...> wrote:
> I am considering making a device that can measure 0-60 times, 1/4
> mile times, etc for automobiles. This is going to be for my senior
> project in electrical engineering. I am looking at the ADXL202
> accelerometer from analog devices, and was considering using the
> basic stamp. I am not sure if this combination will provide me
with
> the data I need. I was condiering just dumping the data to storage
> and processing it later on. If anybody has and comments or ideas
> please let me know.
>
> Thanks
you are building. Also Top fuel cars don't pull 5 g's.
[noparse][[/noparse]Non-text portions of this message have been removed]
>Also check out a commercial product called a G-Tech pro. I believe it is what
>you are building. Also Top fuel cars don't pull 5 g's.
>
A fast tight turn on a WELL BANKED curve could easily exceed
the lower 2 g limit.
Without banking you'll do well to approach 1 g.
How can you differentiate an incline and an acceleration? Somehow you
will need to reference a 'real' horizon like a gyro? In a totally
closed system, you CAN'T separate the effects of gravity and 'real'
acceleration. My uncle Al told me this ;-)
--
.-. .-. .-. .-. .-. .-. .-. .-. .-. .-
\ / \ / \ N / \ C / \ S / \ S / \ M / \ / \ /
`-' `-' `-' `-' `-' `-' `-' `-' `-'
Chuck Britton Education is what is left when
britton@n... you have forgotten everything
North Carolina School of Science & Math you learned in school.
(919) 286-3366 x224 Albert Einstein, 1936
>you are building. Also Top fuel cars don't pull 5 g's.
They do when they crash.
pilot who said he could routinely pull 8 g's without wearing a g suit.
He later developed a severe inner ear (balance) problem and is now
grounded.
Dennis
Prof & Director
USC Center for Balance Disorders
LA CA USA
Original Message
From: moretraction@a... [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=oSumZFspbk_BJo6Kt-YvJR76AxsH1a5O21k322eqRg1Tpx4ZwWTYf5n1HqqBuwcTeFgzG-VityjlZhxb]moretraction@a...[/url
Sent: Sunday, January 20, 2002 11:30 AM
To: basicstamps@yahoogroups.com
Subject: Re: [noparse][[/noparse]basicstamps] Accelerometer I dea Question
Also check out a commercial product called a G-Tech pro. I believe it is
what
you are building. Also Top fuel cars don't pull 5 g's.
tilt, and then subtract the gravitational component of the tilt from the
output of the linear sensor to get 'pure' linear acceleration. Chuck's
uncle Al explained this in "The Evolution of Physics", Einstein and
Infeld, published in 1936.
Dennis
Original Message
From: Chuck Britton [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=Sb5JTUgiKHvawOzVi7FpVhIdZkJ7lJk8z9l36QnkxCgK-nK2SykoAYBRh2jomdGrZT_yxNULAZRnZw7vRXSs]cvbritton@t...[/url
Sent: Sunday, January 20, 2002 2:48 PM
To: basicstamps@yahoogroups.com
Subject: Re: [noparse][[/noparse]basicstamps] Accelerometer I dea Question
How can you differentiate an incline and an acceleration? Somehow you
will need to reference a 'real' horizon like a gyro? In a totally
closed system, you CAN'T separate the effects of gravity and 'real'
acceleration. My uncle Al told me this ;-)
--
.-. .-. .-. .-. .-. .-. .-. .-. .-.
.-
\ / \ / \ N / \ C / \ S / \ S / \ M / \ / \
/
`-' `-' `-' `-' `-' `-' `-' `-'
`-'
Ditto that. Steve Irwin, aka "The Crocodile Hunter" seems like a pretty
tough guy, and he passed out cold in the back seat of a jet trainer during a
maneuver that pulled something like 3 g's.
I want to see the device this project is intended for...
BTW, I once piloted a TAFC running a nitro mix during a test blast. What
forces may I have been subjected to that crazy day? (building it was more
fun!)
CL
the lower 2 g limit.
Without banking you'll do well to approach 1 g.
I take it these are not absolute measurements........?