Need help designing a "one-off" DAQ system

[WhackyWheels]

Hi,
I'm not sure if I'm in the correct forum, if not please direct me in the right direction.

For the past few years I have been pondering the idea of building my own DAQ system. This is not because I feel that existing DAQ systems are inferior, I simply have not seen anything that will do the things I want.

Generaly, I need to measure aproximately 50 seperate things, e.g. rotational speeds, various tempurture points, atmosphircal conditions. From what little I know I have determined that 45 digital and 5 analog channels will be needed. I would like record at least one hour worth of data from all of the measuring channels. Of course, I would like to down the data via RS-232 or something of the same idea. Additionaly, I will eventually set the system to transfure the on-board data using "Burst Telemetry"
Also, while driving the data will need to be sent to a small CRT dash unit for visual reference and warning perameter settings. I thought I would use LabView products.

The application is for a high speed gear-box 2-stroke engine go-kart.

If there is anyone who direct or guid me through this would be greatly apprecive.


Please except my graditute for just taking the time to reed and response.

Thanks.

Whacky Wheels

A.K.A. Wing-Nut

 

[m777182]

I have some experiences with different DAQs; the largest had 16 analog voltage inputs, 16 analog Pt1oo temperature inputs, 24 digital inputs, 24 digital outputs, 3 timers and 3 frequency inputs with 70kB on board (do not laugh at-that was 20 years ago!) and a programmable RS232 link. It was programmed in basic and I still like it because everything is so transparent. I used DOS because the com port is easily accessible. Recently I am using a Nidaq pad 6020E, that is much better technology but you need drivers to communicate.
The important thing is how fast you want to read the data. Send me details on dixie.m@email.si.
regards
m717782

 

[EdDanzer]

That is a lot of inputs. Iotech, National and others have systems that can do this, but it will be expensive if you need very frequent samplings, it may take multiple cards.
We built an Iotech system for hydraulic testing, isolating noise from the portable system was a bit of a challenge. Weight may become an issue for a single system, so several small units may be a better choice. Do a search for data collection at

http://www.globalspec.com

 

[cbarn24050]

Hi, I have a little micro board that would do that, you would need to develop a program and build the interface yourself. If you think you have the time and skills to do that let me know and i'll send 1 in the post for you.

 

[nbucska]

How much data do you want to collect and how fast?
Do you want to store it and analyze later or at real time?

<nbucska@pcperipherals.com>

 

[WhackyWheels]

mbucska,

If I understand your question correctly I wish to record/log about an hours worth per session.

Regarding your question about storing data to analysis is coreect.

Only about 10^ to 15% of the channels analog form.