Assistants of programming and data acquisition

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• motion control for vertical actuator and data acquisition

  Hello

  I am a researcher (a branch of civil engineering) geotechnical engineering and I have very little knowledge about the acquisition of control and data motion, so would need a lot of help from the experts OR. I have only knowledge base on these 2 aspects based on my reading of some materials on the Web site of NOR and youtube videos, so I hope that you bare with me . Here are my questions:

  I am trying to build an actuator which will be used to push a probe (a penetrometer with a load cell to measure the resistance of a soil sample), resembling the concept, photography in the attached file. I need to have these criteria for my system:

  (1) actuator, which can push the probe at speeds between 0.01 mm/s - 300 mm/s with precision and move the probe cyclically (upwards and downwards) in the vertical direction
  (2) load expected on the probe into the ground range: 0.02kN - 6 kN.
  (3) necessary to get the load cell load data and the speed of the probe.

  4) able to control the actuator to a PC (speed and posotion) and monitor data from transducers and data log time even the transducers.

  Guess my beginners is that I will need:

  For orders:
  (1) software - LabVIEW and NOR-motion assistant

  (2) controller - NI PCI-7342

  (3) driver/amplifier - analogue servo AKD Drive

  (4) motor - motor brushless servo AKM

  For the acquisition:
  (1) software - based LabVIEW development systems

  (2) amplifiers or other device - no idea what type on the conditioning of signals

  (3) data acquisition device - no idea what type

  Since I'm a beginner, is - that someone might recommend components (hardware and software) for the control and data acquisition. I'm on a tight budget, so I thankful if someone could help me to recommend components good enough to build my system.

  Thanks for your help.

  At these rates, you will need to run the sensor for the cDAQ.  You can configure the analog output on the Tritex nationally on the position.  There is an adjustable filter that you can set in order to get a clean enough to 300 Hz signal.  When you learn about the Tritex, make sure that let you them know what comms and e/s that you want to use.  If I remember, not all options have worked together.  The analog output may need to be my, but you can put a resistance through the acquisition of input data to get the voltage instead.  I don't remember all the details.  You should really not too much on the Tritex/LabVIEW side.  You will send your movement parameters (beginning of end of race, speed, position, accel, cut), and if you cycle (I believe you) or simply running in a loop.  You could also just be able to use the functions of jog.  When you get close to knowing exaclty what you need, PM me and I'm sure we can work something out with the drivers.  You need only the basics.  In fact, you could probably do this all your movements via digital and analog i/o.

• 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...

• I had to reinstall all my programs and data to a new disk, the old crashed. During the installation of Flash Player, I can't go any further than the password stage as he rejects. Again the username and password have been accepted without any problem to ac

  I had to reinstall all my programs and data to a new disk, the old crashed. During the installation of Flash Player, I can't go any further than the password stage as he rejects. Again the username and password have been accepted without any problem to access Adobe.

  Strangely the same problem occurs when I try to install and older version of Lightroom 4.

  Can you help me?

  Hello

  It is the OS, not Flash drive, to ask for the password.  Please refer to the FAQ what userid & password I need to install Flash Player? for assistance.

  --

  Maria

• 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.

• reinstalled vista and I want to get my old programs and data in the windows.old directory saved

  My system crashed, and after that a dozen tries to fix, I reinstalled edition vista family. I still have my old files and progrmas in windows.old file I can access but can't get the programs and data in the file. Is there a way to do this?

  Hello

  These should help you recover you can:

  How to restore your personal files after you perform a custom Windows Vista or Windows 7 installation
  http://support.Microsoft.com/kb/932912

  How to restore your Windows.old folder in a new Installation
  http://www.Vistax64.com/tutorials/237033-Windows-old-folder-restore-into-new-installation.html

  I hope this helps.

• How to migrate to Windows 7 - the company - German to Win 7 Professional - English (keeping all my programs and data)

  Original title: HOW TO: W7-company-German to W7-professional-Englisch (keeping all my programs and data)

  Hi all

  I have installed W7-company-German. After having changed jobs & employer, I received a copy of W7-professional-English.

  How can I install the new version AND keep my data, programs, configs?

  The installation process indicates that an upgrade from English into German is not possible, I have to do a custom where installation all my data (and programs) will be lost. Of course, I have backups, but re - install all programs will take ages...

  Any help?

  Peter

  Unfortunately, this option is not possible. You will need to do a custom install using your Windows 7 Professional CD and recover your data from the Windows.old folder:

  How to: perform a customized Windows installation

  Another option if you don't mind not continue working in German is the following:

  Of course, you will need to use the German media Windows 7 Professional for this task:

  http://techingiteasy.WordPress.com/2012/05/12/how-to-downgrade-Windows-7-editions/

• If I have 64-bit and 32-bit on the same computer, do I have access to the same programs and data?

  Currently, my system is Windows 7 64 bit with 8 GB of RAM. I know that the 32-bit version can use only 2 GB but it runs on a computer that has more, right? Assuming I'm right about that, if I install both, should I rate the same programs and data?

  You can install the two operating systems on a player, but you must create a separate partition for one of them.
  You can share data, but not the programs that each application must be installed in each version.
  That said, I see no benefit in the same version of Windows, but with different pieces of dual-boot. Why would you do?

• Is it possible to export or save my 5 Lightroom presets and keywords/tags on an external storage drive before a wipe program and data because of a corrupted registry? Thank you.

  Is it possible to export or save my 5 Lightroom presets and keywords/tags on an external storage drive before a wipe program and data because of a corrupted registry? Thank you.

  See these instructions for how to move your computer to a new LR and copy things to a backup device until your computer is reformatted, you reinstall LR:

  http://www.lightroomqueen.com/how-move-Lightroom-to-new-computer/

• 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.

• 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 to program dynamically data acquisition?

  The question may seem, I want to dynamically change the settings of a data acquisition card (DAQmx). The idea is to have a loop event caputures GUI and the other while answering the while loop DAQ events. It's something like loops PRODUCER-CONSUMER. However, I can do all thing once, but not on the fly. Any suggestions as to how we can achieve this?

  Thank you

  Thanks for the comments. I solved the problem with the traditional approach. Here is the graphic interface to work.

• How can I recover programs and data from Windows.old after upgrade to Vista?

  Windows XP Professional has been installed beforehand.  None of the programs or data have been transferred to Vista.

  Hello

  You cannot recover programs from windows.old folder

  It needs to be reinstalled from the original media

  Here's how to retrieve data from the windows.old folder

  How to restore your personal files after you perform a custom Windows Vista or Windows 7 installation

  http://support.Microsoft.com/kb/932912

• How to re - install Windows without losing my programs and data?

  Some files in my Windows 7 are corrupt, but works very well except for the guide download Windows Security and Windows 7 upadates and repair fixed. How can I reinstal without losing my programs?

  I have Windows 7 Home Premium and it works very well, but don't let me do the updates of Windows 7 and Windows security updates. I tried to fix and goes through the installation at the end and charging programs and said then there restore the previous version.  How can I reinstall a good copy of Windows 7 without losing my programs? I can't wait to do a "clean install" when everything works fine, except as described above and an occasional "blue screen" which causes a reboot.

  It takes hours to recharge the programs and ID more their upedates, do Windows updates, etc. when everything is fully functional.  There must be something to replace the old version to create a clean version, i.e. going from Home Premium from Windows 7, etc.  Thank you.

  Would be to replace Microsoft Professional it Home Premium and Igor files corrupted which may be there.

  I must say that, if you want to install Windows 7 Professional, you must do a clean install.

  also can you name the updates that you can not install? as (KB...)

  Follow this article http://windows.microsoft.com/en-US/windows-vista/Troubleshoot-problems-with-installing-updates

  Also download and install Windows 7 SP1 update from the link below

  http://www.Microsoft.com/download/en/details.aspx?displaylang=en&ID=5842

  Download 'Windows6. 1 KB976932 - X64.exe' for x 64 bit Windows

  Download "Windows6. 1 KB976932 - X 86 .exe' for x 32 bit Windows