LabVIEW data record

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• 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.

• How to read the heart rate data recorded by the Apple Watch?

  My wife wears a Apple Watch and suffer from power cuts irregulars. After the last of them, I checked the data through the health app and saw that at the time of the blackout, there seems to be no saved data. A range of heart rate was recorded both before and after the blackout. Can someone explain how the data record? Thank you

  MIchael Gilmore

  This explains the various triggers causing the heart rate measure:

  Measure your heart rate with your Apple Watch - Apple Support

  Here is some additional information:

  Your heart rate. What it means, and where on Apple Watch you will find. -Apple Support

• measure the angular speed, angle and trigger using a gyroscopic sensor breakout board and LabView data acquisition

  How to measure the angular velocity, the angle and trigger using a gyroscopic sensor breakout board and LabView data acquisition?

  There is a single channel data acquisition code which measures the angular velocity, angle and flexibility using a gyroscopic sensor breakout board and acquisition of LabView data attached to this, I need a help to creat two-channel data acquisition code?

  Hello

  Attached is a vi that you can use in order to read the measured angular position of an encoder.

  If you need more examples on the tasks that you can develop with NOR-DAQmx and LabVIEW, you just need to open LabVIEW and click Help > find examples > Input and Output material > DAQmx > entry counter.

  Kind regards

• Download the data recorder of NOR

  How can I download the data recorder of NOR?

  It depends on what OS you are using and what data logger you talk.  Do you mean Signal Express or the data recorder included with the NOR-DAQmx Base driver?

  Signal Express for Windows

  NOR-DAQmx Base for Mac OS X, Windowsor Linux (Mandriva, OpenSUSE, Red Hat WS 4 or 5 only).

• LabVIEW data Plugin SDK

  Is - this Labview Data Plugin SDKis always running on LV2009?

  I installed it but have no idea how to do to work with. I can not even find the mentioned help file LV_DataPlugin_SDK.pdf after installation.

  I wanted to use it to write a Plugin to G data for a custom results file. I'm looking for a range of specification or feature of accumulation LV of special or something else...

  Any help appreciated

  Christian

  Hi Christian,

  I checked with R & D on this, and they said that the SDK to use LabVIEW currently in office cannot work with LabVIEW 8.6.  They also said that they are a few days from the end of the version of LabVIEW 2009.  I have no idea where the files got installed in your computer, or not at all.  My recommendation is to wait for the 2009 version of LV or find a LV 8.6 computer.

  I'll let know you when I hear more,

  Brad Turpin

  Tiara Product Support Engineer
  National Instruments

• LabVIEW data into a text file

  I have a LV program to save the LabVIEW data into a text file. The LV file is attached. My problem is: the first data that are saved after the headers of data, is on the first line of the text rather than the second file. Ideally, it should be line 1, line 2 from data headers. I don't know what is the origin of the data to be concatenated with the headers. Can anyone help on this please.

  Thank you and thank you for your time in advance.

  Hello!

  Your problem seems to be quite simple, if I understand it right.

  All you need is a constant to be concatenated with your header line end.
  The end of the constant line is equal to CRLF.

  So, if you concatenate the header with the CRLF, your concatenated string will be like: "header \n".

  and then, in the following lines (1, 2, 3...) your data will be available as it was already.

  I enclose a snapshot with this change.

  I hope that solves your problem!

  Best regards.

• Error: Members similarly on the data recording in double size

  Hello
  
  When loading in the cube, I get an error staing
  "Members of the same size on the data record"
  
  But I don't see duplicates in the master table or in the dimension tables.
  
  How can we find these duplicates?
  
  Thanks in advance.
  
  -Shema

  Hello
  See this response from John Goodwin:

  https://KR.forums.Oracle.com/forums/thread.jspa?threadID=2264153

  See you soon

• How to save a calendar I created with the photo and the dates recorded on separate pages?

  How to save a calendar I created in photoshop with the photo and the dates recorded in the form of two separate pages?  When I save in pdf or jpeg, they are automatically save 1 pg with dates and photos on a single page.  This is causing problems when I print.

  Hi there, in which case your printer is not very large, you can also trim down the two versions and print them as separate documents.

  (1) create a guide where you want to split the pages by clicking on the rule (hit control R if they are not displayed) and dragging to the desired location.

  Create the Guide to make it so be precise in the way which divide you your page, and so that no part of the image will be repeated or lost.

  

  (2) select the Cropping tool and adjust the area of culture at half top of your agenda, using the guide you have just made to align with the right place. Press return to complete the harvest.

  

  (3) go in file > save as the. Name the file something like calendar_top and select the desired file format. Press "Save".

  

  (4) once you return to your calendar file, go to the history Panel and select 'Guide to flirting This will bring you to step before you cropped the image.

  

  

  (5) repeat the steps as before to the bottom half of the schedule, once more, using the guide to help you make your growing area.

  

  

  

  Then you would just print each of the two pages individually. The images does not appear in a single document, but if you have Acrobat you could combine the files.

  I hope this helps!

• Governor limit exceeded in the generation of cube (data records Maximum exceeded)

  Hello
  
  I have a PivotTable that contains about 30 measures and the lines are also measures. The columns are the last 12 months, I get the following error when you try to view the results:
  
  Governor limit exceeded in the generation of cube (data records Maximum exceeded).
  Error details
  Error codes: QBVC92JY
  
  
  I checked view pivot instanceconfig.xml and these settings are set to higher values:
  
  < CubeMaxRecords > 100000 < / CubeMaxRecords >
  < CubeMaxPopulatedCells > 100000 < / CubeMaxPopulatedCells >
  < PivotView >
  < MaxVisibleColumns > 5000 < / MaxVisibleColumns >
  < MaxVisiblePages > 5000 < / MaxVisiblePages >
  < MaxVisibleRows > 100000 < / MaxVisibleRows >
  < MaxVisibleSections > 5000 < / MaxVisibleSections >
  < / PivotView >
  
  I do not know why this error pops up as the set of data is not large, there are 30 rows and 12 columns.
  
  I followed http://obiee101.blogspot.com/2008/02/obiee-controling-pivot-view-behavior.html
  
  Can anyone help?
  
  Thank you

  Hello

  Increase the size of CubeMaxRecords and CubeMaxPopulatedCells and check it out.

  600000
  600000

  See you soon,.
  Aravind

• Exceeded maximum data records

  Hello
  
  I use a pivot table report in the responses and this error message:
  
  View display error
  Governor limit exceeded in the generation of cube (data records Maximum exceeded).
  Error details
  Error codes: QBVC92JY
  
  
  There are around 40660 records in the data, can someone advise how to overcome this error?
  
  Thank you

  Reference http://obiee-blog.info/uncategorized/some-obiee-errors-nqserror/
  http://obiee101.blogspot.com/2008/02/OBIEE-controling-pivot-view-behavior.html

  This link can also be useful http://knowledge.ciber.nl/weblog/OBIEE/OBIEE10340CONFIGURATIONTAGS.pdf

  Hope this helps you.

  By,.
  KK

• cRIO-9073 only with Labview 8.6? Data record?

  I don't know if you have a special forum for the cRIOS. If so, tell me

  A guys at work told me, he bought a cRIO 9073 two years because he wanted to save the data on vehicles on a USB key.

  He has never had time to work with this thing, after all, and today he asked me, if I can try to get this to work. I had never seen one of those from before, but as far I see this device is no usb port and using the ethernetport to connect to a WLAN-bridge will not work, because when you drive around in the car, you will leave the fast enough network - so I guess the only way to do it might be loggin data in internal memory (128 MB). Is this fair?

  The other problem is, we only have a single license for Labview 8.2 here (the rest is 7.1 )-are there a chance that I can write a Labview program for the cRIO with whom? It is stated in the specifications minimum labview version: 8.6 necessary .

  I can work around that somehow?

  Yes, you need save data on the Flash drive internal, then copy it off the power when you can plug it into a network.

  Write code for the cRIO, you need real-time tools box and perhaps also the FPGA Toolbox.

  If the documentation indicates that you need 8.6 to target the cRIO, then it is you need.  Where did you see that?  I know that 8.5 could target former cRIO controllers, but it is quite possible that 8.6 was the first version with support for this model.

• Maximize the continuous digital data recording rate

  I'm trying to record digital data clocked outside large amounts quickly.  The data is only for post-processing.  What is the best way to get data from the port on the hard drive at the fastest possible pace?

  I connect using a PCIe 6537 B.  I log on 4, ports of 8 bits to 40,92 Mhz, so a rate of ~ 160MBytes per second.  I have two designs I've tried so far (a producer-consumer architecture and a DAQ.mx configure logging design).  Both models work if I connect only on two ports (effectively halfing the necessary flow) but fail to the width of 32 bits.

  My producer consumer architecture fails after about 30 seconds of recording successful message

  Error - 200613: Acquisition was stopped to avoid a crushing of the input buffer.

  My other DAQ.mx configures logging design fails quickly (~ 1 sec) with

  200361 error: Overflow memory on-board

  .

  I could be set it up incorrectly.  As I said, it works with 16-bit data width.  I don't know if the increase in the width of the data directly is the problem or if the increased flow to fail.

  I use this on a 3 GB ram windows xp using labview in 2012.  I have attached the vi of my two attempts and a picture of the DAQ.mx set the logging design.

  Well, I'd suggest the integrated PDM recording method would probably be you give best results, assuming that it works at all.  This record type opens a DMA channel of the material on the hard drive so it should not produce copies of useless data, which would probably be a producer consumer loop.

  I never tried logging TDMS without reading the data, a Read DAQmx should be used in the loop?  Your file contains TDMS data?

  The challenge of your hard drive?  It is a flat disk of laptop?  I recommend you test on a SSD, if possible, just to see.

  There are also properties to open up to a size of memory buffer.

  Start with one of the logging TDMS basic examples delivered with LabVIEW and work your way up from there.

• data record

  Hello

  I try to save data using Labview. I am using a USB data acquisition hardware.

  My question is: how to set the time for only the recording feature (I try to use the express VI: 'Write LabVIEW measurement file'). The program will run for a period of time (days) and we really need to connect to any data one or twice an hour.

  It's something I'm resolved as soon as possible...

  Thank you
  Jon

  Here's a rough express VI code that should do what you want. Just have an express VI thread of time elapse in a housing structure. It should work as long as you are not trying to acquire more quickly than seconds.

• determination of the sampling rate and the frequency waveform data record

  Hello

  I write a simple program that collect data from a triaxial accelerometer input, convert it to a frequency spectrum, and then save the time domain and the frequency of the waveforms in an external file separated.  I don't understand how to set the sampling frequency, however.  On the DAQ Assistant, I updated the acquisition mode "Samples continues" and read samples is 2 k, which corresponds to the total number of data points that are collected.  How can I program sampling for awhile, it 30 seconds, for example?  Wouldn't be better to set up a trigger, as it will continue to collect data up to what I told it to stop?

  I also want to save waveform data in a separate file that can be easily seen by other computers that have not installed Labview.  I have currently the program put in place to convert a text string of the waveform of the time domain and then save it in a text file or a spreadsheet.  It works fine, but I would also like to record the frequency wave, which is a different type of data.  How can I do this or is there a better way?

  My program is attached.  Thanks for your help!

  Here's how you can use the shift register to build the table, and also where you can choose to play exactly 100 samples per while the loop iteration.

  

  Brian