time measurement between two finite pulse

Similar Questions

• Measure the time between two digital pulse

  Hello

  For a non-critical calendar application, I need to measure the time interval between consecutive TTL pulses, ranging from the order of 0.5 s for a few seconds, with a low accuracy of +/-10-50ms. The interval being measured varies between the rising edge of the first pulse and the front of the next and so on.

  I have several input lines I need to deal with. Because it's a critical machination low cost, I don't want to use digital counters for each line, so I work with an acquisition of data USB6008 and have connected the input rows TTL on the digital inputs of the device. Avoiding will be sufficient.

  I found a good example of VI on discussion forums that does almost the same thing, only it uses instead of the DAQ Assistant user input. The VI works including the time the program going on in a while loop. I replaced with the DAQ Assistant output (a channel) user input in the hope that it is still work.

  

  When I run the program in "run once" mode, it seems to work perfectly. However, in "continuous run" it measures only a very small interval, probably just the time between two samples.  I think it has something to do with the help of a while loop in combination with the DAQ Assistant. Anyone who has any suggestions how to solve this problem?

  Thank you!

  OK... first of all, you should never use the button "run continuously.  I wish that NEITHER would be to eliminate it, but told me that it is sometimes useful for debugging.  If you want your program to run over and over again, use a while loop with a stop"" button.

  If I'm reading your code correctly, you make your initial moment, and then collect data from data acquisition.  When one of the channels is "T", you stop your loop and the end time of capture.  (By the way, why you convert your table to a cluster?  Why not just index the appropriate channel in the table directly?)

  Since you want to capture the time between two consecutive pulses, you need to know when a transition has occurred... i. e when your digital line went from F (no pulse) to T (pulse start).  This will give you your forehead.  Right now, all you're doing is looking for a value T - so you have no way of knowing if you are looking for to the previous impulse again, or a new impetus.  You also burn 100% of your processor with the way you have your programme in place.

  You need a small loop delay so that your VI is not 100% of your hogs CPU time.  Given that you can live with an accuracy of 50msec, what I suggest that you use.

  See attached picture for you give an idea of how to implement.  He will probably need some refining operations, but it should point you in the right direction.

  

  I hope this helps.

• How do the time difference between two dates?

  Hi all
  
  I use this query to get the time difference between two dates.
  
  Select to_timestamp ('2012-10-03 12:00 ',' YYYY-MM-DD hh)-to_timestamp ('2012-10-03 11:00 ',' YYYY-MM-DD hh) as double diff;
  
  but do not get the correct result.
  
  Thank you

  Left KEY... Left Padding of tanks.

• How to measure the time elapsed between two steps?

  Hello

  In my script, I ask the subsequences. How can I measure the time it takes each subsequence?

  Something like:

  Statement: StationGlobals.TimeElapsed = 0

  -> SOMETHING HERE TO START A COUNTER<>

  call sous-suite

  Popup: Str (TimeElapsed)

  Thanks for help

  StationGlobals.Time = Seconds()

  ... / / stuff in time

  StationGlobals.Time = Seconds() - StationGlobals.Time

  You can also view the sample report of basic step in 2012 TestStand time (you can now download an eval).

• Find the time delay between two signals

  In this code, I sent you a pulse in the acquisition of data using labview. The pulse triggers a thermistor to another analog input input data.

  I want to find the delay between the time of the positive edge of the switch, and the exact time of the DAQ begins to take in the signal of the temperature probe.

  I enclose the code below.

  Thank you.

  Hey,.

  Here is a link to some information about the sources of clock on the FPGA.

  http://digital.NI.com/public.nsf/allkb/94CE338CC80ACF008625791400516BAA?OpenDocument

  Hope this helps

• What is the time interval between two Oracle certification exams?

  Hello world

  I'm looking forward to associate level certification in SQL and PL/SQL.

  According to a link from the official website of Oracle, I need to spend the next two STAGES to win the Oracle PL/SQL Developer Certified Associate Certification. The two steps are:

  URL of the location where the screenshots below (measures) is as follows:

  https://education.Oracle.com/pls/web_prod-PLQ-dad/db_pages.GetPage?page_id=653 & get_params = P_ID:162 #tabs - 1

  

  

  There are to options available in two stages , so I chose to give the two following tests:

  1 (from step 1) EXAM: 1Z0-061 (database Oracle 12 c: basic SQL)

  REVIEW 2 (step 2): 1Z0-144 (Oracle Database 11 G: program PL/SQL)

  Now my questions are these:

  Question 1: I intend to take the exam 1Z0-061 first (lets say in June), may therefore take the second exam (1Z0-144) at any time after appearing for the first review or is there no specific time frame in which I'm suppose to take the second review?

  
  

  Question 2: will what type of certification I get if I take only one exam (1Z0-061 or 1Z0-144)? I know Oracle's official website said that in order to get "Oracle PL/SQL Developer Certified Associate Certification", I need to pass the two exams; but what happens if I chose to give only a single review at the present time? In the case giving a single review, what type of document of certification will I right to (wave speculation: right to half certification Oracle PL/SQL Developer )?

  Thanking you.

  
  

  Best regards

  Ankit

  Answer 1: He is there no time limit/limit. Finally, I guess Oracle takes his retirement 1Z0-144, but which does not occur for many years.  They have not even removed from the earlier incarnation (1Z0-147).

  Answer 2: Passing a review in itself does not have a certification or credential.  The only "book", you will have is the sheet of test results.

• NEAT SQL - time scale between two records to find...

  Hello everyone, first of all please let me apologize because it's a fundamental issue, however my sql is nowhere near as good as my design skills and I'm having a headache with something...
  
  In simple terms, I have a table which we will call "TBL_MOVEMENTS".
  
  In this table, we record the time several doors open and close. So we have the passes "DT" (Datetime in timestamp), 'DOORID' and 'STATE '.
  
  For the sake of examples, we will say that we want to select the hours each door was open for. (actually every door will open and close hundreds of times)
  
  The data in the table would present a little as follows...
  
  DT DOORID STATE
  ----------------------------------------------------------------------------------------
  2010-01-15 09:00:01.223 OPEN A3
  2010-01-15 09:02:04.789 OPEN A1
  2010-01-15 09:07:55.123 NARROW A3
  2010-01-15 09:08:12.654 NARROW A1
  
  
  In English the logic I would attempt in the direction of
  
  Select the doorid and the timedifference between each open event and the very next event close to the same door.
  
  If anyone can help I would be very grateful!

  Hi and welcome to the forum!

  You are looking for something like this?

  SQL> WITH door_events AS
    2  (
    3          SELECT TO_TIMESTAMP('2010-01-15 09:00:01.223','YYYY-MM-DD HH24:MI:SS.FF3') AS DT, 'A3' AS DOORID, 'OPEN' AS STATE FROM DUAL UNION ALL
    4          SELECT TO_TIMESTAMP('2010-01-15 09:02:04.789','YYYY-MM-DD HH24:MI:SS.FF3') AS DT, 'A1' AS DOORID, 'OPEN' AS STATE FROM DUAL UNION ALL
    5          SELECT TO_TIMESTAMP('2010-01-15 09:07:55.123','YYYY-MM-DD HH24:MI:SS.FF3') AS DT, 'A3' AS DOORID, 'CLOSE' AS STATE FROM DUAL UNION ALL
    6          SELECT TO_TIMESTAMP('2010-01-15 09:08:12.654','YYYY-MM-DD HH24:MI:SS.FF3') AS DT, 'A1' AS DOORID, 'CLOSE' AS STATE FROM DUAL
    7  )
    8  SELECT  DOORID
    9  ,       DT              AS DT_OPENED
   10  ,       DT_CLOSED
   11  ,       DT_CLOSED - DT  AS DURATION
   12  FROM
   13  (
   14          SELECT  DOORID
   15          ,       DT
   16          ,       LEAD(DT) OVER (PARTITION BY DOORID ORDER BY DT) AS DT_CLOSED
   17          FROM    DOOR_EVENTS
   18  )
   19  WHERE   DT_CLOSED IS NOT NULL
   20  ORDER BY 1
   21
  SQL> /
  
  DO DT_OPENED                      DT_CLOSED                      DURATION
  -- ------------------------------ ------------------------------ ------------------------------
  A1 2010-01-15 09:02:04.789        2010-01-15 09:08:12.654        +000000000 00:06:07.865000000
  A3 2010-01-15 09:00:01.223        2010-01-15 09:07:55.123        +000000000 00:07:53.900000000
  

  Published by: Centinul on January 15, 2010 14:46

  The minor error.

• calculation of time between two time as timestamp

  How can calculate two hour, START as the timestamp TIME in the data type, END TIME as of time also.

  select END_TIME-START_TIME from PROG_DLY_WORK
  

  Result

  + 01:50:00.000000 000000000

  How can get exactly the time spent as 01:50 ? and these calculated time must sum (elapsed_time) in another column.

  oracle as PaaS cloud environment

  Product	VERSION	STATUS
  NLSRTL	11.2.0.3.0	Production
  Oracle Database 11g Enterprise Edition	11.2.0.3.0	64 bit Production
  PL/SQL	11.2.0.3.0	Production
  AMT for Linux:	11.2.0.3.0	Production

  Time difference between two columns in hours

  Start

  FOR REC IN (SELECT START_TIME, END_TIME, CALC_TIME CAL_ID)

  LOOP

  UPDATE CALc_TIME

  SET ELAPSED_TIME = round (())

  TO_DATE (to_char (REC. End_time, 'ddmmyyyyhh24miss'),

  "ddmmyyyyhh24miss")-

  TO_DATE (to_char (REC. Start_time, 'ddmmyyyyhh24miss'),

  "ddmmyyyyhh24miss")

  () * 24).

  WHERE CAL_ID = REC. CAL_ID;

  END LOOP;

  end;

  Lag in minutes

  Start

  FOR REC IN (SELECT START_TIME, END_TIME, CALC_TIME CAL_ID)

  LOOP

  UPDATE CALc_TIME

  SET ELAPSED_TIME = round (())

  TO_DATE (to_char (REC. End_time, 'ddmmyyyyhh24miss'),

  "ddmmyyyyhh24miss")-

  TO_DATE (to_char (REC. Start_time, 'ddmmyyyyhh24miss'),

  "ddmmyyyyhh24miss")

  () * 24 * 60)

  WHERE CAL_ID = REC. CAL_ID;

  END LOOP;

  end;

• How to find the time between two channels of entry in the data acquisition card or pci 6036

  Hello

  I read a lot-related posts on the simultaneous measurement of two input voltage of similar channels in map data acquisition. I know that the best material is "simultaneous measurments of the Series DAQ cards" but I only pci data acquisition card 6036 and I try to understand what is the time between the reading of the two channels . This period is always constant? (must it rely on a voltage (amplitude, frequency, waveform..). I send the sine wave (s) to the two channels and read the values of V, if they read the same value, the difference should always be zero but I get-0,002 to 0.002 Volt difference (I must find a way to convert it in time). A screenshot of my VI is attached. I wonder how I can accurately measure the time delay between the channel.

  I am open to any suggestion, my final goal to read exactly two channels at the same time ((ou connaître le délai exact donc je peux correspondre les données correspondantes étant donné le temps de retard))

  Hi spinup,

  better you should post your question in the forum of LabVIEW, LabWindows/CVI is used

  Good luck.

• Take the time between two values

  Hi people,

  I have a problem and I know idea how to solve... I need help.

  The problem is I want to take the time between two values max as you can see in the chart.

  For example, in the image that I have add

  4.5 - 1 840 = 2.66

  And enter this value in the 'time between mostra '.

  It's that I want...

  But what I think is very complicated, because I don't know how to take the time correctly and does remove...

  Thank you very much

  Any solution?

  Hi jocuma,

  I tried something and hope that helps u.

  Just create two arrays of temperature and voltage. First of all, I'll get the value of the voltage when it is more of a certain value and that same index to get the value of time and store in the shift register.

  When I get the second higher than the limit value, I'll get time and subtract the previous value.

• Estimate the time between two computers

  Hello, everyone. I want to develop a program for communication between two ip addresses: IP1: 192.168.1.100 IP2: 192.168.1.101 Suppose IP1 is the server IP2 is the Viewer, then I want to put in place a program to estimate the elapsed time for IP1 contact IP2, but I don't know how to do. Also, I want to display the elapsed time for the connection (which varies due to fluctuations in the internet), performing actions such as continuously 'ping' the receiver from the server. Can someone show me the way to achieve this? Thank you very much. Best regards yukfai88

  Please do not shout

  How about using ping?

  Insert the output in an analysis of string to read the value you need. Sorry my OS is in German so you have to adapt ;-)

  

• Difference between two times

  I am building a working method in LiveCycle, and I want to track how long the procedure takes. To do this, I have two time fields, and then a third time field to find the difference between two time fields. Looking at other posts to discussion, I could find a Javascript code that was part of what I wanted, but I can't get the third time field to display in the format I want. I tried to change the habits of the fields and that did not work. Could someone offer some advice on how to change the format or help me with the code?  I couldn't figure to attach the actual file, but I have attached a picture of the PDF file and the Javascript code I used.  If you look at the TimeIn (hh: mm) and time (hh: mm) areas (on the photo, I have attached), you will notice that the TotalTime comes out like HMM, and I want that it out as hh: mm.

  

  

  Any help would be greatly appreciated!

  Thank you

  this.rawValue = (totalHrs > 9? String (totalHrs): '0' + String (totalHrs)) + ':' + (totalMins > 9? String (totalMins): '0' + String (totalMins));

• Dynamic action - Get the difference between two dates + times

  I have problems a little dynamic to work action. I'm trying to get the time between two dates with the time difference.
  
  Here is what I got (this is apex 4.0):
  
  Two date pickers + two numbers fields (date/start/end times)
  
  I created a dynamic action on the page who fires on the point lose focus (above points).
  
  The real action for the DA is the body of the PL/SQL function:

  declare
    end_date DATE;
    start_date DATE;
  Begin
    start_date := to_char(:P1_START_DATE || ' ' || :P1_START_TIME, 'DD-MON-YYYY HH:MIAM');
    end_date := to_char(:P1_END_DATE || ' ' || :P1_END_TIME, 'DD-MON-YYYY HH:MIAM');
    :P1_HOURS := end_date-start_date;
  End;

  When I change the values on the page, I get the following error:
  
  AJAX call back Server error ORA-06502: PL/SQL: digital or value error: character number conversion error to set the value.
  
  I'm guessing that there is a problem with the date formatting, but I can't make it work. Thanks in advance!

  Hi djston,

  because you chose the dynamic action of 'Set value' with the "Body of the PL/SQL function" type you need to return the value. Try the following code

  declare
    end_date DATE;
    start_date DATE;
  Begin
    start_date := to_date(:P1_START_DATE || ' ' || :P1_START_TIME, 'DD-MM-YYYY HH:MIAM');
    end_date := to_date(:P1_END_DATE || ' ' || :P1_END_TIME, 'DD-MM-YYYY HH:MIAM');
    RETURN (end_date-start_date)*24;
  End;
  

  and P1_REQUESTED_HOURS like 'item affected. "

  Concerning
  Patrick
  -----------
  My Blog: http://www.inside-oracle-apex.com
  APEX 4.0 Plug-Ins: http://apex.oracle.com/plugins
  Twitter: http://www.twitter.com/patrickwolf

  Published by: Patrick Wolf on January 17, 2011 10:54

• Find the difference between two date and time

  Hi friends,
  
  I wanted to find the difference between two date and time, but my qury is slightest error "invalid number."
  
  

  select sql_step_num,proc_name,run_seqno,start_date,end_date,(to_char(start_date,'HH24-MI-SS') - to_char(end_date,'HH24-MI-SS') ) as ed  
  from eval.EVAL_RUNTIME_DETAILS
  where trunc(start_date) = trunc(sysdate) 
  order by sql_step_num;

  You try to get the feel between two char strings.
  And more difference between two dates gives a NUMBER of days.
  Try this:

  select sql_step_num,proc_name,run_seqno,start_date,end_date,numtodsinterval(end_date-start_date,'DAY') as ed
  from eval.EVAL_RUNTIME_DETAILS
  where trunc(start_date) = trunc(sysdate)
  order by sql_step_num;
  

• Find the time to intersampling between two channels AI USB 6251

  Hello

  I want to know how late it is between two-channel sampling of HAVE in a USB-6251 (term mass) used in conjunction with a block of connection SCB - 68 (Labview 8.5, Windows XP).  I realize that there's only an ADC and simultaneous acquisition is not available.  The specs are listed as follows:

  Sampling frequency:

  Maximum: 1.25 MECH. / s single channel;  1,00 multi-channel MECH. / s (aggregate)

  Minimum configuration: no minimum

  Timing accuracy: 50 ppm of sampling frequency

  Temporal resolution: 50 ns

  We know of a way to understand this point other than by experimentation?

  See this