motion control for vertical actuator and data acquisition

Similar Questions

• Card FPGA and data acquisition synchronization

  Hi, we are control and data acquisition of several hardware devices (including Photodetectors and translational stages). Until last week, we used all the controls and acquisition using a PCIe-7852R FPGA board. However, we decided to move the acquisition part to a PCIe 6363 DAQ card to improve the sharpness of the tension. During the test, I found that the internal clocks in the FPGA and the DAQ cards are slightly inconsistent (not just a phase delay, but a difference in the period).

  I know because I have generated a square wave (period = 20) using the FPGA and gains using the data acquisition card (at a rate of 200 kHz, that is, 1 taste every 5). I have observed acquired place shifts 5 every 5 seconds approximately. Such a change does not occur if the production and acquisition is done using the same Board. Therefore, the only explanation is that the data acquisition and FPGA cards clock frequencies are different. According to my calculations, the percentage difference between their time clock must be 5/5 s = 0.0001%.

  Therefore, I wonder if there is anyway to synchronize clocks between them. Or, is it possible that I can drive the FPGA clock-based DAQ hardware, or vice versa? Also, please let me know if there is something trivial as I fix.

  Thank you very much.

  Kind regards

  Varun

  Hi Varun,

  my post was only one solution...

  Your data acquisition card may take an entry to control sampling of trigger. In this mode, samples draw on a rising edge of the external clock signal. As long as you stay within the limits of the DAQ (100 MHz for your card) material sampling works perfectly. There are even examples coming with LabVIEW explaining how to program your data acquisition card...

  This mode use you your FPGA as clock source sampling for data acquisition. Both will run on the FPGA clock in sync. When the FPGA is a bit out of 40 MHz, so it won't matter because both devices are triggered on the same clock signal...

• delay between the trigger and data acquisition

  Hi, I use NI SMU-6368 as a tool for data acquisition. In my experience, I use an external digital trigger to start taking measures of a thermistor.

  However, before the experience, I want to know the time that elapses between the detection of the trigger signal and data acquisition start time.

  Is there a way to do this?

  Here's the kind of thing I configure to get an accurate measure of time of t = 0 trigger signal to the

  the actual first A/D conversion.   It may be too much for a measurement of the temperature, but you should get

  the right track.

  -Kevin P

  

• Is "Introduction to data acquisition" by R. King a good reference for learning programming of data acquisition?

  Is "Introduction to data acquisition" by R. King a good reference for learning programming of data acquisition? Or can anyone recommend a better text.

  Why don't you start hera.

• Expert secrets for using RMAN and Data Pump by kamran agayev and Aman Charm

  Hello
  
  This book is available in INDIA:
  Expert secrets for using RMAN and Data Pump by kamran agayev and Aman Sharma
  
  How can I get this book in India.
  
  Thank you
  Alok
  
  Published by: user12141893 on April 6, 2012 11:25
  
  I tried to purchase this book online official site crawling but shipping cost was more than the cost of the book.
  Book is not available on Flipkart and Amazon

  Helios,

  OP can send a mail to me too :-).

  OP,

  We are in discussions with the editor. In India, the book by another editor partner and details of it that I'll update when would be available. Thanks for your interest in our book.

  Aman...

  PS: This is a technical forum and is not intended for topics. Please discuss contacting Keita and me by email personally. Keep the forum in order that it is served for-technical discussions.

• Control and simulation and data acquisition

  Hello

  I am applying to motor control in Labview. I'm sampling speed from DC engine in real time through an acquisition of data. (my sampling time is 1000 samples per second)

  Then wrap speed as input to a Simulation (simulation and design of the order) and inside the loop simulation, I have a PID controller. The PID has the actual speed of the engine for the acquisition of data and the engine reference speed as input.

  Reference engine speed comes from the generator of signals (control design and simulation-Simulation) and is a waveform.

  My step in the engine size is 1000.

  I am running this application real-time and drawing the reference signal and the motor real signals. I run into several problems with regard to the calendar.

  1. when I change the size of the step of the simulation loop, the frequency of squares of reference also seems to change. For example. What step size = 1000, duration of pulse = 1 s. What step size = 100, pulse width = 0.1. (My pulse frequency is 1 Hz, Simulation clock - 10 kHz). How step size can affect the pulse width.

  2. can you explain the relationship between the DAQ, the Simulation step size loop sampling time, Loop Simulation period.

  3. If I want to collect different sets of data using sampling different hours, it's OK to change the sampling DAQ time without changing the size of the step of the simulation.

  Would also like to emphasize that the DAQmx calendar under sample clock mode is placed in front of the simulation loop and the output is connected to the loop simulation.

  Appreciate any help.

  Hello

  Maybe some screenshots of your code would help. Furthermore, what you have read your samples together with your DAQ screws?

  (1) If you have a waveform, the output is specified as:

  

  For example, if you change the size of the step of the simulation loop, you change the simulation time which are introduced into the signal generator and affecting the waveform that you see if you do not have a size quite small step to characterize the waveform that you generate.

  (2) sampling DAQ rate is the speed at which samples are taken on the acquisition of card data itself. The size of the simulation step, help. "Specifies the interval between the time when the ODE Solver evaluates the model and updates the results of the model, in a few seconds." Simulation loop, still using, "Indicates the amount of time that elapses between two subsequent iterations of the loop of control & Simulation.". " "Step size determine the value of t that is introduced to the functions you use in the loop simulation while the loop simulation period controls simply to how fast you change the following t value. The sampling rate of DAQ hardware is a clock of completely separate hardware controlling the analogue-digital on the DAQ card converter so that you can get a deterministic dt between the samples being acquired.

  (3) you can change the schedule for the acquisition of data, but you will need to restart each time the changes take effect. If you change the calendar of data acquisition and want your values to correlate with your simulation, you will need to change your size of step as well.

  -Zach

  -Zach

• How can I use other companion DAQmax and data acquisition in labview code?

  Hello

  I'm new in labview and want to combine four different codes of labview and run them at the same time.

  I use my data acquisition PCI-6071E and BNC-2120. I want to send an analog output (flat DC signal) to control a blower, an analog volmetre to a (DC) output pressure transducer, also receive data from a pressure sensor and hot wire probe.

  I wrote four different VI for each of them (using DAQmax to output analog and DAQ assistant for analog inputs) and each of them works well, but when I want to use them together they do not work.

  Anyone know how to make them work together?

  Thank you

  Pooya

  To the DAQ Assistant, simply follow the instructions for the selection of multiple channels when you create (where he says quite clearly,' ' or to select multiple channels "). If already created, open the DAQ Assistant and click on "Add channels" at the top of the page.

  When you use a physical channel name, you simply click on browse instead of a single channel. Use the same or for multiple channels.

• Error 200220 CRIO 9081 and data acquisition modules

  Hello

  I try to use a CRIO 9081 with NI9206 modules. Max recognize the chassis, but not the module.

  When I try to add an acquisition of data associated with the NI9206 in Veristand, 200220 error message seems.

  I have the solution, finally he was required to add a custom device to search for new engines and detect modules. Then, it is possible to interact with modules.

  Thank you very much for your help!

• How can I use FNDLOAD for XML reports and data defnitions

  I program simultaneous registerd bound reports xml and data defnitions in instance of staging and managed to switch to DEV... After updating of this stage and when I download the details of DEV and transferred to the program only simultaneous scene I can download... Can we use the command FNDLOAD for definitions of data or the data model for the XML report, FNDLOAD used for the simultaneous program, he transferred only the details of the program at the same time.

  Hello

  Use XDOLoader.

  Note: 469585.1 - how to use XDOLoader?
  https://metalink2.Oracle.com/MetaLink/PLSQL/ml2_documents.showDocument?p_database_id=not&P_ID=469585.1

  Kind regards
  Hussein

• How to control the sampling time during data acquisition

  I managed to manually collect 16 channels of analog signals (writing custom file VI) using a command Boolean start/stop.  I would like to allow the user to set a term of the sample on the front panel (for example, 20 seconds) and initiate sampling by clicking a start button.  The user can also put an end to the reception of the data before the end of the set time by clicking a stop button.  I looked at several examples of countdown timer, but could not figure out how to integrate it with my VI.  All suggestions and examples will be very appreciated.

  You are far too complicated. On the one hand, there is the function elapsed time on your palette. Secondly, as already mentioned, there is a relationship of basic arithmatic between samples per second and the number of samples to be read. Use you will get samples more than this as requested anyway. Finally, your code shows two analog read tasks. You can do that, unless there are two separate devices.

• Cannot create disks C and D for the programs and data on HP Pavilion dv6-6c53cl with 1 TB HD

  Just bought new HP Pavilion dv6-6c53cl Entertainment Notebook - 1 TB HD (it's good).

  Bad news is that there are FOUR partitions (C, SYSTEM, RECOVERY, TOOLS HP) with the C-drive with 904 GB.   If I understand correctly, you cannot shrink C and create a 5th partition for data.  It seems that you cannot have more than four partitions...

  (quote from sevenforums.com: ' you already have 4 primary partitions - you can't have more. ") If you try to make another c: partition using disk management, you will turn your (entire) disk into a dynamic disk. You don't want to do that! »

  HP experts: Is it true? I can't shrink C and create a disk for data D?  Can I combine one or more of your three auxiliary drives (SYSTEM, RECOVERY, TOOLS HP) and a disk for data D?

  I've always heard that it was not a good idea to combine all, Windows programs, system etc all in the same giant partition with lots of photos, songs, financial data, Word files, etc etc.

  Please notify.

  I have a 1 TB hard drive and use the main C for all files. I use images software to make my own custom recovery solution, having 1 large partition makes it simpler. Custom recovery options

  However, your question is how to have another partition. Daniel made a Guide on everything this HERE

• Assistants of programming and data acquisition

  Using the flat sequence and DAQ Assistant, how can implement us planning algorithm to enable or disable a specific image in the sequence?

  Do not use the flat sequence structure! You can't turn any image. Just one of the disadvantages of the structure of the sequence. They are rarely necessary. Flexibility, use a state machine.

• Executable files and data acquisition Drivers

  It is an interesting question that I hope someone can help me with.

  My client has little code I need support.  They have a card PCI-1200
  card.
  My understanding is the latest driver that works with this card is
  Traditional DAQ 6.9.3.

  They have 6.9.3f3

  Then I made the mistake of upgrading their code of 7.1 to 8.5.  The code
  works
  on my machine.  When I create an executable file, the executable works on my
  machine;
  However, when I try to run the executable file on their computer software
  housing starts
  and then stops.  I get no error.  The executable file only
  don't
  run.

  I wonder what I should create an executable with the driver
  Version
  6.9.3 on my development machine?

  Thank you

  Dan

  I solved the problem!

  I downloaded the 8.5.1 engine LENGTH of Web site of NOR and installed on my target machine.  It worked!

  Previously, I copied the execution engine of my Cache on my development computer folder.

• water data acquisition motor control

  dose anyone know how Precisele engine in labview using DAQ? Please tell me how I can do?

  Concerning

  Saeed

  OK, I'm him giving the alternative energy source and just to control data acquisition rather then powered data acquisition, shell, I use the driver of transducer between the acquisition of data and engine or any other switch. Yes I m interested just in power of the engine after obtaining the indication of my sensor. Please tell me what I can use between the engine and data acquisition.

  Kind regards

  Saeed

• The reading of data acquisition via tcp

  Hello

  I am building an application that controls an acquisition of data via tcp.

  I have a JAVA program that communicate with labview, give a command and data acquisition starts. (So, I read the correct Java data at Labview)

  My problem is if I try to read data acquired by data acquisition (continuous sample 1 k samples), I've read strange values.

  I transform of double values in the string and send it via tcp.

  How can I read it in Java? What type of socket should I use? What is a rate problem?
  I also tried to transform small/big-endian byte order, but it does not work.

  I enclose a sketch of this part of the application.

  Please help me, I try for 2 weeks!
  Thank you all...

  I find the solution in the lavag forum.
  I post here, if it can help someone.

  http://lavag.org/topic/16359-sending-LabVIEW-data-via-TCP/page__pid__99983#entry99983