output signals of the rectangle a PEAK sine wave conversion

Similar Questions

• Measure the period and the peak value at crest of a sine wave

  Hello

  I am new to Veristand and Labview and I was wondering if there is the possibility to do the following:

  I would like to measure the period of a sine wave that I capture from analog input of my data acquisition (SMU-6363). Apart from that, I also want to measure the value of crete to crete (Vpp) of the sine wave.

  I hope you can help out me.

  Thank you.

  If the sine wave is of significantly higher frequency than the primary control loop can run... The best way to do it would be to put the DAQ hardware in waveform input mode and use a custom device to read the waveform and perform analyses.

  an example is here: requires some labview skills

  \examples\NI VeriStand\Custom analysis Devices\waveform

• Simulate the sine wave using LabVIEW FPGA with NOR-myRIO and display in real time

  Hello

  I'm relatively new to LabVIEW FPGA. I am trying to test (and later apply) controllers high speed on myRIO.

  At this point, I'm trying to simulate the sine wave from 1 to 10 kHz using Sinewave generator VI express. I also intend to display the sine wave on the time real (RT) using FIFO. However, I had a bit of trouble to understaing various synchronization parameters.

  1. how to encode information about the sampling frequency generating sine wave? (The side FPGA vi requires only the frequency of the signal and possibly phase and does not rate update lines)

  2. how to estimate the number of items in a FIFO? (that is, the relationship between the rate of updates to loop (RT), the signal frequency, sampling frequency and the number of items in the FIFO)

  It would be great if we could share a very simple program (side host and target) that did something similar.

  Thank you

  MILIN

  Milot,

  I think the problem is the type of data in your FIFO. Your FIFO is configured to use a data type of I16. The problem is the number, it displays only ever will be-1, 0 or 1. To resolve this problem, you must send the sine wave as a fixed point data and convert it to a double on the side of the RT. This should significantly improve your resolution.

• Generate a digital output that indicates the frequency of half of the contribution

  Hi, I'm new with data acquisition. I would like to get your help.

  I have a digital signal input that is generated by an encoder. I would like to generate an output signal of the way that his level of signal will change at each edge of the awareness of the input signal so that the frequency is half that of the entry.

  I would like to know how to do this using the NI DAQ M 6221 map.

  Thanks for your help

  

  Hardware solutions can be so simple... sometimes I prefer an iron solder wire

  Look at the section counter...

  I think there's a prescaler/separator for the meter... and the next would try to drive the output to a PFI

• How to display different sine waves in a table and do a fft of these and display them in a chart?

  How can I cannect my mathscript output SIgnal of VI entry spectral measures. I have a problem since the release of the mathscript "D" file is 2D DBL. I don't know how to convert such data in order to be logged at the entrance of the signal of the VI of spectral measures. I also want that the waveform graph connected to the output of the VI measures spectral, display the FFT of three sine waves in a chart.

  

  Do not connect. Just go to Forloop.

  

• How to take a derivative of a sine wave?

  I know this is probably very simple and I'm sure that I'm doing something stupid, but please could someone help me... I'm just trying to draw the derivative of a sine wave on the same graph as the original sine wave. There seems to be working (it shows a cosine wave), but the magnitude is far away. Please could someone just point to me why the amplitude is off... the original sine wave going between 1 and -1, but the derivative is between 60 and -60

  Just speculating, but...

  1. The derivative of a sinusoid of 10 Hz should have an amplitude of ±60 remarks (2 * pi * 10).
  2. The VI of sinusoidal waveform has a default frequency of 10 Hz.

  Coincidence?

  Best regards

• Why my output signal is produced waves triangle when I want the sine waves

  in labview I use the daq assistant to create an output voltage signal to create a sine wave. When I connect it to the opscilloscope, it reads the triangle waves. is someone can you please tell me why this is.

  9172 is a chassis so I need to know the module you use, too. You should try the example:

  %ProgramFiles%\National Instruments\LabVIEW 2012\examples\DAQmx\Analog Output\Voltage - Output.vi continues

  It shows you how to create a waveform to generate, you could use this piece and feed in your daq assistant.

• Two synchronized USRPs receive the same sine wave emitted by an another USRP, there is a phase shift random and obvious between the signals received from the 2 receivers

  Hello world!

  First of all, I use a USRP as a transmitter to emit a sine wave (the signal is exp(j2*pi*f*t)), and then I use the external clock to synchronize the two USRPs (Ref as PPS in are connected to the clock) as receivers. Receivers are in sync, and they are at the same distance from the transmitter, I thought that the signal they receive should have a nearly the same phase. However, in practice, the phase shift is big enough, and this problem really confuses me.

  It's the received signals of 2 receivers.

  Yes. What you observe is expected.

  Near the bottof of this document read the area 'alignment Phase vs Phase coherence '.

  http://www.NI.com/white-paper/14311/en/

  And also, for the alignment phase, see the following 'Angle of arrival detection with NI USRP '.

  https://decibel.NI.com/content/docs/doc-25716

  Erik

• Change the shape of the output signal without initializing the new process of output signal

  Hello!

  How to change the shape of the output signal produced on the output channel without initializing the new process of output signal?

  Thank you

  Yes, you can do the same thing without count/killing the task all the time.

  Attached VI shows how to use redeclenchables AO in the same way, using a meter like time base for the AO.

  Please note that attached VI uses the same Subvi as in the example you posted before.

  Christian

• Develop the analog output signal

  Let me start by saying that I am a new user of LabVIEW. My experience with LabVIEW is limited to a briefing in which we covered documents in the guide, «Introduction to LabVIEW and Computer-Based measurements» manual the customer Hands-on  With regard to what I'm trying to accomplish:

  I'm using LabVIEW 8.6, OR cDAQ-9172 and number of NI 9205 and NI 9264 module.  I have a load cell that requires a constant supply of 10V to operate.  I don't know how to generate this signal or the signal in mV, which is removed from the load to the cDAQ-9172 cell.  I tried using DAQ-Express for entry and exit signals.  Once I have created two assistants DAQ, I'm not sure what to do next.  In addition, the load cell has four sons: green, white, red and black.  Green = + GIS, red = + EXC, white = - GIS and black = - Exc.  The Red wire is connected to ao0 and the black wire is connected to the COM of NI 9264.  the Green wire is connected to ai18 and the white wire is connected to the NI 9205 module ai26.

  Any help on this is greatly appreciated!

  Yatsco

  Hello Yatsco,

  Fan of the crows is correct that you would be more successful using a NI 9219 instead of the combination of the PCI module, HAVE / AO. However, it might be possible to use the modules, you should use the load cell, that you try to use, but we need more information on the sensor to say with certainty. A link to form would be preferable.

  Assuming that everything would work out with the sensor itself, I would do something like the following:

  1. Configure your analog output DAQ Assistant for output on the 9264 ao0, leave all default settings except for the generation Mode, you should change it to 1 sample (on request).
     
  2. Configure your analog input DAQ Assistant enter ai18, keep all the default settings again except for sync settings, which should resemble the following:
     
  3. Your drawing should look like this:
     

  If you do this and you encounter problems with your sensor or its response after the datasheet (or at least the manufacturer and part number), and I'll look into it further.

• express the signal voltage AC (sine wave) to form the Phasor

  Hi, engineers, is anyway in Labview that I can express an alternating voltage (sine wave) in the form of Phaser? Thank you. Please see this link for background information:

  http://en.Wikipedia.org/wiki/file:Unfasor.gif

  I have not used it myself, but try this: http://zone.ni.com/devzone/cda/epd/p/id/2982

• cwdsp. Sine wave is where the sampling rate?

  Hello

  According to the method above (CWDSP. Sine wave), the parameters are the following:

  (n, a, f, Phase)

  n As Variant - [Input] number of samples to generate.
  Amp as Variant - [Input] Amplitude of the signal that results.
  f As Variant - [Input] frequency of the signal resulting in standardized units of cycles/sample.
  The phase as a Variant - initial phase [output] in degrees of the generated signal. Output, the Phase is the phase of the next portion of the signal. Use this setting in the next call to this function to simulate a generator of continuous functions.

  We are not lack of sampling frequency?

  example:

  I want to generate the next sine-

  FREQ = 1 kHz

  sampling frequency = 10 kHz

  (Number of samples) block size = 1024

  Amp = 1

  How will you use this function for this signal?

  I think (but I'm not sure of it...) is: CWDSP. SineWave (1024, 1, 1/10, 0)

  There is an example: "power spectrum".  In this example, they do not mention the sampling frequency and the signal is generated as follows:

  CWDSP. SineWave (1024, 1, 0, 1000/1024)

  No mention of the sampling frequency.

  Thank you

  Hey Rafi,

  Both of your assertions are correct.  The frequency of de.1Hz at no time is the equivalent of what you would get from sampling equipment of a wave of 10 kHz to 1000 s/s; in both cases, you will see a cycle of the wave every 10 samples, as you are pointing out.

• Best way to send signals between the two screws

  Hi all

  I have two screws that generate some complicated signals (sine wave, pulse, etc.). The other one takes manually entered the tension and pressure send to certain material with a pump and reads the output of the pump.

  

  What is the best way to send the waveform of the signal VI the VI hands-on? I still need to be able to control the signals manually in this manual control VI.

  Thank you.

  Your user interface would handle this. If you use a machine to States (hint-hint) you would simply chose the State appropriate for your current configuration. You would provide a mechanism (UI, configuration file, argument of command line to name a few) for the parameter which mode to use, and the application would have chosen the appropriate action.

• Generating analog output signals 4 with different frequencies

  Hi all

  I was trying to say to generate 4 different signals at different frequencies

  1. first waveform is a sine wave with 5000 Hz,

  2. other with 8000Hz,

  3. third, one is a square with 25 Hz waveform and

  4. fourth one with triangular waveform 50 Hz

  all waveforms must be generated simultanoeusly.

  I tried to generate with the task unique analog output and sample clock (clock rate is 100000). Cross in scope that I see only 5000 and 8000 Hz we generated correctly and the rest two waveforms show the incorrect frequency.

  I guess that's due to the frequency of high clock to sample for more low frequencies for ex 25 Hz and 50 Hz. If I reduce the clock rate to get the lower frequencies properly so I can't generate frequencies higher correctly. (there's a clsh between frequencies and the clock frequency)

  Is it possible to use DAQ board master sample clock and its magnitude downward revision (everywhere where it is necessary for each waveform separately) to generate all the signals at different frequencies at the same time in a single task?

  
  

• Is it possible to change the sine wave 'exit' a simulation device?

  I work on a LV collection and analysis VI in LabView that interfaces with a CDAQ-9178 loaded with 9215 modules/a. chassis.  In the Measurement & Automation Explorer, I was able to set up simulated devices that work with my code and I get the sinewave / 5 (?) standard signal noise %.

  However, to really test my application, I need a slightly different sine wave with high frequency (1-10 Hz vs the)<1hz sent="" by="" the="" simulated="" device). ="" is="" there="" anyway="" to="" modify="" or="" get="" the="" simulated="" device="" to="" output="" a="" different="" wave? ="" if="" not, ="" are="" there="" any="" other="" simple="" ways="" to="" simulate="" the="" device? ="" i="" could="" write="" another="" vi="" to="" send="" out="" a="" sinewave="" but="" was="" looking="" for="" a="" more="" obvious="" or="" simpler="" solution="">

  Thank you

  # You need to do is call an of the generating functions of waveform instead of the DAQmx Read. Place inside a case, the declaration or the conditional structure disable is fairly simple.