simultaneous analog sampling using PCI-6133.

[brindian]

Hi there,

I am using the PCI-6133 board to sample 16 channels (Only 8 at a time) from a line detector. I'm using the DAQ assistant to read in the 8 channels but I would like to know if it's possible to convert/combine these analog signals into a different format.

Idealy, I would like to convert the 8 channels into an image (8x1) with each input voltage signal representing an intensity value.

Is this possible with LabView/DAQ?

[AdnanZ]

You should be able to do this. You have asked a very broad question; is it possible for you to share some of your code and talk a little bit more about your application so we can realize what exactly is it that you are trying to get done?

[Hillman]

Hi Brindian, Good afternoon and I hope your well today.

I was wondering how you've got on with your application and if you required any further support - I've noticed you haven't logged in since you've posted on the forum. 

I have generated a quick piece of example code which uses the producer/consumer design pattern to first generate data - which you can replace with you DAQ) and then a consumer loop that displays the data (and you can add any anylsis that you need to do). The example is in LabVIEW 8.6 but I have also attached two images. 

Please let me know if you have any questions and how you get on, 

I'd also be interested in the request extra information by Adan. 

Block Diagram:

 

Note: you will need to alter the intentsity range to colours that mean more to you. 

Message Edited by Hillman on 03-31-2009 04:18 PM

[brindian]

Thanks for replying Hillman & Adan,

Sorry I haven't been able to post the information you requested sooner, I have just gotten back into the lab today.

A little bit of information about what I'm trying to do:

The Line Detector I am using has 8 photodiode elements (like an 8x1 pixel camera) and I was exposing these photodiodes to a light source, creating a series of intensity values.

I am using an NI BNC-2110 board to read in the 8 intensity/voltage values and I'm using that in conjunction with the NI PCI-6133 board to read the analog inputs.

I then created a DAQ assistant to try and attempt to do something with the data but that's as far as I was able to go.

I could post a picture of the DAQ assistant if that would be helpful, but it's just a block that works in conjunction with a device, reading in the values from the input BNC ports (ai0 --> ai7)

I then wanted to create images at 4 equally spaced intervals from the intensity values present on the photodiodes at each of those times. (So creating an image 4 times over equally spaced intervals from the intensity values)

After each interval I also wanted to save the image created from the intensity value.

That's the entire task that I want to do, so I hope there is some more information there that would be of some help.

I also forgot to mention that the images I am dealing with don't need to be in colour. I'm just looking at intensity values on the photodiodes at some point, so the image I want to create will just be black and white.

Thanks

Brian McKerrow

[Hillman]

Hi Brian,

Good afternoon and I hope your well today.

I am unsure what you mean by images, do you mean just values? or you wish to convert these to color indicators...

If you could maybe provide a drawing I'd be very happy to continue to support you!

Sorry for the delay also.. not had any free-time to support the forums 😞