VBAI2014 fast data recording

I work with a VBAI.vi which captures images of a dual GigE camera and a cRIO information. It is supposed to recover information quickly and write them on a hard drive.

The procedure looks like this (you can also see them in the picture ' "operating mode." ") JPG'):

  1. The image is entered via dual-gig-e and the module "image acquisition.
  2. Via the "Calculator" module, the name of the file is determined and several variables are read via a cRIO network.
  3. Through the module "data record" variables are written in a .csv file in the hard drive.
  4. Via the 'image' module, the acquired image is written as a .tiff file to hard shore.

Our camera is able to charge up to 19 frames per second per double Gig-Ethernet. To avoid a passing image-guy, we need to acquire and write the information on the hard disk in seconds 1/19--> ~ 50 milliseconds.

As you can see in the "" measures. "" "JPG", the procedure takes between 80 and 100 ms, the slowest of the modules seems to be "data record" stage which takes 44 ms, which seems strange because it appears less elaborate than the image logging. You can see the data that are saved in "" forest operations. "" JPG ".

You have an idea how I can speed up this process? I thought to write a LabVIEW VI, which records data from worksheet instead of using the module "data record" of the VBAI, but I don't know how to run VI in VBAI.

These delays are not by the speed of the hard drive, I get similar results on a virtual disk.

Thank you very much for the help!

Sincerely,
Paul

Here are some tips to improve performance:

1. make sure that you uncheck "Display result Image for that State" upstairs to the left of the script of inspection box. This, for all your States to improve performance. I think the Datalogging might look like he takes so long because the update of the display is asynchronous, and whenever the operating system decides to redraw the image, it can happen to be whenthe datalogging step is running.

2. make sure that you run in mode of inspection. Configuration mode adds a lot of delays, so you can see the status of the inspection

3. you can try logging of images and data in the background (there is a setting in steps). This will not be guaranteed that each image is saved but if you get images faster your hard drive can connect to them. If this is the case, you may want to consider:

-Get a faster as HD and SSD.

-Try different file formats (BMP or JPG can be faster than tiff)

-Make sure that you are not including the overlay to the image since this converts into a color image and can produce much more to save on disk images.

4 try to run the 64-bit version of the VBAI to improve performance.

5. do you have a fast PC you run this on?

As a quick test of validation, open the attached inspection. I put a CQI simulation in the State of the installation (view > view full Inspection Setup, then click the installation state in the box on the left toolbar). Then choose Run > Benchmark Inspection with 50 iterations and see how long the image is logging. This will give you an idea of just how fast your hardware can support saving to disk. Try various formats such as JPG, BMP, PNG image, etc. as different PC configurations will have different performance.

Tags: NI Hardware

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