Count the number of 1 is present in digital waveforms obtained by converting the pulse signals.

Similar Questions

• How to count the pulses using RIO (FPGA)

  Hello

  I want to use RIO (FPGA) for counting the pulses produced by a sensor,

  but I don't know how to program. can someone help me.

  Thanks in advance

  CAIX wrote:

  Hello

  I want to use RIO (FPGA) for counting the pulses produced by a sensor,

  but I don't know how to program. can someone help me.

  Thanks in advance

  Search for example for 'Meter of RIO' finder.  There are dozens of examples that should help you.

• How to convert the pulse signal line single layer

  Hello

  I tried to create a VI that will allow me to convert a pulse signal (generated by a tachometer) in a line single layer, indicating that a revolution succeeded. I would like to overlay this line on other signals generated.

  I am able to detect the falling edge of the signal, but I could not make a suitable line. I tried to create a new waveform, and juggle the markers, but no method worked for me.

  Does anyone have ideas for a good way to do this?

  Below is my test VI.

  

  Make the second vertical lines style trace (trace style: no points, no interpolation, fill - inf). a NaN whener you don't want a power cable and a '+ inf' when you want a vertical line.

  Here's a simple example:

  

• How can I count the pulses in a channel?

  Hello

  I have a channel consisting of 0 and 1 (data comes from a proximity sensor) and I was wondering if there is an easy way to count the events (i.e. pulse) to (Advanced) Tiara? At its simplest, I just need a method to count the number of rising edges in the channel.

  A script would be the way to do this? If so, is there any example autour code to demonstrate how to analyse the lines in a channel?

  Thank you

  PorridgeMan.

  Hello!

  @Martin: IMHO your aproach can operate, but need not because of input data and the right compares value (10 in your case).

  If the input data are not a pure 0-1 step you can get more the a value greater than 10 for a rising edge.

  The comparison value depends on the distance of time and the channel values, and it's not easy to calculate in advance.
  The other drawback I see is that you need a channel of X, which is not really necessary to solve the problem.

  I think my code will be more robust (IMHO as I mentioned).

  @PorridgeMan: Yes, it's a shame it takes certain steps of DIAdem to solve this common problem.

  First: By script is possible, but generally to slow down. My approach is to insert a 0 value at the beginning

  a copy of the input channel table and compare it to the input string. If a value is less than 0,5 (half of you maximum values)

  and the other is higher I put a 1 0 otherwise in a result string. Even in more complicated cases, the comparison value could

  be calculated or alienated by a moving average.

  Here is the code:

  Option Explicit
  
  ' Copy data
  Call ChnCalculate("Ch(""[1]/Dif"")=Ch(""[1]/Pulses"")")
  ' Insert one 0 at the beginning
  Call DataBlInsertVal("[1]/Dif",1,1,0,0)
  ' Compare and convert result to 1 or 0
  Call ChnCalculate("Ch(""[1]/Result"") = IIf((Ch(""[1]/Pulses"") < 0.5) And (Ch(""[1]/Dif"") > 0.5), 1, 0)")
  ' Sum is result
  Call MsgBox(Cch("[1]/Result",4))
  

  Hope this helps

  Matthias

• How to count the pulses with digital input on 6351

  Hi all experts in Labview,.

  I just got my USB x series 6351 and it works fine, but I certainly lack of labview skills to use it to its full potential.

  I would like to read digital pulses with several digital inputs and count the number of pulses each T interval in time. All impulses that I entered on any edge of the clock are not synchronized and can occur at random times during the tests. Basically I have an oscillator of square waves can I modulate the frequency. I don't want to use the meter as inputs as I'm limited to only 2 entries (if I use the option 2 input meter for metering of pulses or frequency). The input frequency can range from 0-1 kHz and goes 0 - 3V. So not too fast, and I shouldn't make too many mistakes trying to get the count of pulses and then back out the frequency in accordance with article ni.com on counters.

  I would like to read the 8 digital input channels and get the number of impulses for each channel. I searched high and low for help online but can't find examples that have been useful. Anyone have any ideas on how to go or direct me to a resource? Thank you very much in advance!

  Are you worried about getting the number as a physical operation timed?  It would be nice to acquire a digital waveform and then postprocess on it to detect how many events took place?  I've attached an example that shows how you can accomplish this. It reads a digital waveform and then uses a detection of crete VI to determine how many pulses occurred. Should be a few adjustments to your particular signal.  The VI I use seems to count events twice (probably count each edge), so counting it gives should be reduced by half in order to work.

• I want to generate a pulse of a meter train and count the pulses with the other counter on a USB NI DAQmx 6259.

  
  

  Salvation;

  Here is the solution for your problem.

  The cause is that "Gen dig Pulse Train-Finite" uses Ctr0 both Ctr1.

  Please refer to:

  "When you do a finite pulse train generation, a counter generates pulse train, and the other counter generates an impulse that acts as a barrier to the first counter. If you change the pulse train to generate continuously or

  only generate a pulse, you can run two tasks of meter at the same time without error. »

  http://digital.NI.com/public.nsf/allkb/04BEDD9E9E91ED3486256D180048116D

  I used Ctr0 and Ctr2, jumping Ctr1 as it is reserved by "" Gen dig Pulse Train-Finite ". I works very well.

  Kizito.

• count the pulses ttl only on 2 V

  Hi I have a problem while I was trying to count a pulse ttl using the DAQ Assistant. The problem can be simple, but I just can't solve that since I'm new to LabView.

  There is a TTL pulse produced of our ODA that is about 30 ns width, 5V. I want to use LabView to perform the count of photons. But because of the noise, I want to put a number limit of 2V, so the software one count higher than 2V TTL pulse. But I can't do that. There is no option to set the limit.

  And our material is BNC-2110 and PCIe-6323.

  Can someone help me with this? Thank you.

  For a counter entry, the minimum voltage for logic there is 2.2 volts - a ttl level. And no, you can not adjust higher.

• Generate the pulse signal signle on the digital output line

  Hello

  I am now writing a program using c# and DAQmx.

  I have a NI PCI-6514card and I want to send a signal for half a second to a single line of output.

  I know how to write online by using the DigitalSingleChannelWriter object, but I want this signal, disappear after a period of time.

  Thanks in advance for your support.

  J.. Gasser

  One thing is certain:

  C:\Users\Public\Documents\National Instruments\NI-DAQ\Examples\DotNET2.0\Counter\Generate Pulse\GenDigPulse\cs

  It is on Vista.

  On XP, I believe that the path is:

  C:\Documents and Settings\All Users\National Instruments\...

• Count the total number of rows found in the schema

  Count the total number of lines present in the schema, including the table, sequence, view
  
  Desirable output
  
  Table sequence views
  20 of 1000 1000

  Do you mean that you need to count the number of Tables, views and sequence present in the schema?

  Hi something like that.

  SELECT a.view_cnt AS "View Count", b.tab_cnt AS "Table Count",
         c.seq_cnt AS "Sequence Count"
    FROM (SELECT COUNT (*) view_cnt
            FROM USER_VIEWS) a,
         (SELECT COUNT (*) tab_cnt
            FROM USER_TABLES) b,
         (SELECT COUNT (*) seq_cnt
            FROM USER_SEQUENCES) c
  

  Gives you,

  View Count      Table Count      Sequence Count
         153              878                   32
  

  Thank you
  Shankar

  Published by: Shankar Viji on August 28, 2012 03:03

• Count the number of fields in a record of CSV file

  Hello
  
  Here's my problem. I need to open a CSV file on a directory and to count the number of fields in a record. I can easily read the first record using the package UTL_FILE, something like:
  
  UTL_FILE.fopen (s_remote_dir, s_csv_file, 'R', 32767);
  UTL_FILE.get_line (input_file, buffer_entree);
  
  then I count the number of commas in the buffer in order to get none. fields:
  
  IF buffer_entree IS NOT NULL THEN
  n: = < function that counts the number of commas in a string, buffer_entree >
  END IF;
  
  However, this method will not work If a comma is present within a field, that is to say:
  
  127763, account "TRA", 1001, 34, _ "1007 main St., apt. 798 "_"
  (last field contains a comma)
  
  Please notify.
  
  Kind regards
  M.R.

  Here is an example of regexp Etbins solution:

  SQL> declare
    2     line     varchar2(1000) := '127763, "TRA account", 1001, 34, "1007 main St., apt. 798", 42, "This, and that, and more"';
    3     fields   number;
    4  begin
    5     fields := regexp_count(regexp_replace(line,'".*?"'),',') + 1;
    6     dbms_output.put_line('Number of fields: '||to_char(fields,'TM9'));
    7  end;
    8  /
  Number of fields: 7
  

  Edit:
  Added the '+ 1', because the number of commas is a less number of fields ;-)

  Published by: Kim Berg Hansen on November 2, 2011 08:53

• How to count the number of conditionally highlight cells in a column or row

  I'm working on a table to identify problems with my credit rating. So, I have a column that indicates the due date on the invoice and G that contains the date to which I made the payment.

  I'm trying to follow how many times I'm late with payments. I want to improve.

  So if the G column is later than column D, both with the Date formatting. So, now I've highlighted cells and I want to summarize for the year, how many times I was late payments.

  I thought a column G to count the number of days before or after that back I was with payments. But if the sum, it only gives me no useful information. I guess I could count the number of cells with values less than 0.

  I prefer to be able to put in the summary column for G something that said 0-12 years ago has highlighted cells in the column.

  Thank you

  You can not count based on sharing or formatting.  You can, however, be based on the same conditions.

  There are functions:

  COUNTIF() counties based on a condition is true

  and

  COUNTIFS() based on several conditions being true

  = NB. If

  Here is a way.  IT will take an additional column that calculates the "delay" in the days of a payment

  

  the first two lines are the lines of header

  H3 = IF (COUNTA (D3, G3) > 1, MAX ((G3−D3) DUR2DAYS, 0), "")

  It's shorthand dethrone select cell H3, and type (or copy and paste it here) the formula:

  = IF (COUNTA (D3, G3) > 1, MAX ((G3−D3) DUR2DAYS, 0), "")

  Now select cell H3, copy

  Select the H3 cells at the end of column H, dough

  H1 = "payments late =" & COUNTIF(H,">0")

• Count the number of zero terms between non zero terms

  Hello.  I have a table of data of zero and nonzero (example: {1 2 56 2 3 0 0 0 0 0 2 3 5 2 3 5 2 0 0 0 0 32 43}) I need to count the number of zeros of each string of zeros and mark that number against the first zero no term following the string of zeros (NOTE (: string is used here as a description of a series of zeros, not a string variable).  So the plot which coordinates since my example would be (5.2) and (4.32).

  I'm clear on the way to the path, but I am unable to store only each final count of consecutive zeros without having unnecessary data in my plot.

  Thanks in advance to all those who have advice!

  -Mike

  Do something like that?

  EDIT: Minor Correction because of the additional function of decrement.

• How to count the number of edges using counters SMU-6363

  Hello

  I'm counting the number of edges in a test signal in a duration of 50 Ms I use the SMU-6363 map and connect to the TRC test signals 0 SRC (PFI 8). Is that a correct connection? What else do I need hardware wise be a correct set for this application?

  Thank you

  Jeet

  Hi Jeet,

  This configuration is correct. Hardware wise, that's all you need to do.

  Kind regards

  Jorge Fernandez
  Technical sales engineer
  National Instruments
  ____________________________________________
  Certified LabVIEW Associate Developer (CLAD)

• SE I can count the number of lines of UN chain?

  Hello that tal me preguntaba if hay alguna funcion that can count the number of lines that has string of United Nations, for example digamos than esto tengo:

  Hola

  Como

  estas

  Ok

  Son 4 lines, pero hay una funcion as arroje ese resultado? o tengo than generarlo? alguna idea?

  Saludos, buen dia.

  How to dice "Rube Goldberg" en Español?

  

• Boolean switch until the released counter + the number of cycles

  Hi, I want to use a Boolean command button (switch release) to rely on a specific value and when obtaining this value (while pressing continuously the button) to turn on an led. If I release this Boolean button, I want to count the time until a value and then to turn off the light, like a hand for a hand detection dry.

  I was thinking of using the number of cycles in a sequence of plate with a delay for the time being I want to split on a matter of true or false, but the problem is that the count of the number of cycles is continuous and not slaughter not on the specific value I want for the power button truning the seeing.

  Any help?

  TNX

  Guy