Possible to set up buffer - delay in the implementation of large number of buffers - IMAQ trigger problem

Hi all

I thought that I could transfer it here because it might be a more appropriate forum. I have a bit of time pressure, so I hope someone can help me. I'm having a problem with a program that I wrote to acquire and store images from a camera to linear scan.

My camera (SUI Goodrich, 1024 pixels) is connected to a card framegrabber (PCIe-1427), which is connected via a RTSI cable to a PCI-6731 card attached to a SCC-68 (series) connector M.  My goal is to drive a mirror galvanometer scanning and acquire images from the camera continuously on each scan. As the galvo scan will be the frame of an image (1024 pixels x 1024 lines).

I managed to do it (I think), as my direct purchase program works exactly as I expected. However, when I try to save the images, I noticed that for a larger number of images, the starting point of the image is shifted the same amount for each image. I'm not really sure what's going on, it seems to me that there is a delay in the use of the VI "IMAQ set up buffer" when a larger number of buffers is used, (or even 100). Is it possible that my hardware trigger does not wait for all buffers to be configured before you start to run?

I would really appreciate any idea or ideas that anyone could have on this issue.

Sincere greetings,

Gill

I fixed the problem by doing that I don't use actually 1000 stamps to save 1000 frames. Program works if the number of buffers is lowered.

Tags: NI Hardware

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    could you do something like that?

    with t as (select '10100000-1LU' NE,   '22-FEB-2011 22:01:04/28-FEB-2011 01:25:22/' raised ,  '22-FEB-2011 22:12:27/28-FEB-2011 02:40:06/' cleared from dual union
                  select '10100000-2LU', '01-FEB-2011 12:15:58/06-FEB-2011 07:00:53/18-FEB-2011 22:04:56/19-FEB-2011 10:36:12/19-FEB-2011 11:03:13/19-FEB-2011 11:16:14/28-FEB-2011 01:25:22/',
                  '05-FEB-2011 10:05:48/06-FEB-2011 10:49:18/18-FEB-2011 22:15:17/19-FEB-2011 10:41:35/19-FEB-2011 11:08:18/19-FEB-2011 11:21:35/28-FEB-2011 02:40:13/' from dual
                     )
    select * from(
    select NE,   regexp_substr( raised,'[^/]+',1,1) raised, regexp_substr( cleared,'[^/]+',1,1) cleared  from t
    union
    select NE,   regexp_substr( raised,'[^/]+',1,2) , regexp_substr( cleared,'[^/]+',1,2) cleared  from t
    union
    select NE,   regexp_substr( raised,'[^/]+',1,3) , regexp_substr( cleared,'[^/]+',1,3) cleared  from t
    union
    select NE,   regexp_substr( raised,'[^/]+',1,4) , regexp_substr( cleared,'[^/]+',1,4) cleared  from t
    union
    select NE,   regexp_substr( raised,'[^/]+',1,5) , regexp_substr( cleared,'[^/]+',1,5) cleared  from t
    union
    select NE,   regexp_substr( raised,'[^/]+',1,6) , regexp_substr( cleared,'[^/]+',1,6) cleared  from t
    union
    select NE,   regexp_substr( raised,'[^/]+',1,7) , regexp_substr( cleared,'[^/]+',1,7) cleared  from t
    union
    select NE,   regexp_substr( raised,'[^/]+',1,8) , regexp_substr( cleared,'[^/]+',1,8) cleared  from t
    union
    select NE,   regexp_substr( raised,'[^/]+',1,9) , regexp_substr( cleared,'[^/]+',1,9) cleared  from t
    union
    select NE,   regexp_substr( raised,'[^/]+',1,10) , regexp_substr( cleared,'[^/]+',1,10) cleared  from t
    union
    select NE,   regexp_substr( raised,'[^/]+',1,11) , regexp_substr( cleared,'[^/]+',1,11) cleared  from t
    )
    where nvl(raised,cleared) is not null
    order by ne
    
    NE     RAISED     CLEARED
    10100000-1LU     28-FEB-2011 01:25:22     28-FEB-2011 02:40:06
    10100000-1LU     22-FEB-2011 22:01:04     22-FEB-2011 22:12:27
    10100000-2LU     28-FEB-2011 01:25:22     28-FEB-2011 02:40:13
    10100000-2LU     19-FEB-2011 10:36:12     19-FEB-2011 10:41:35
    10100000-2LU     19-FEB-2011 11:03:13     19-FEB-2011 11:08:18
    10100000-2LU     19-FEB-2011 11:16:14     19-FEB-2011 11:21:35
    10100000-2LU     06-FEB-2011 07:00:53     06-FEB-2011 10:49:18
    10100000-2LU     01-FEB-2011 12:15:58     05-FEB-2011 10:05:48
    10100000-2LU     18-FEB-2011 22:04:56     18-FEB-2011 22:15:17
    

    You should be able to do without all these unions using a connection by but I can't quite make it work
    the following does not work, but perhaps someone can answer.

    select NE,   regexp_substr( raised,'[^/]+',1,level) raised, regexp_substr( cleared,'[^/]+',1,level) cleared from t
     connect by  prior  NE = NE and   regexp_substr( raised,'[^/]+',1,level) = prior regexp_substr( raised,'[^/]+',1,level + 1)
    

    Published by: pollywog on March 29, 2011 09:38

    Here it is with the type clause that gets rid of all unions.

    WITH t
            AS (SELECT '10100000-1LU' NE,
                       '22-FEB-2011 22:01:04/28-FEB-2011 01:25:22/' raised,
                       '22-FEB-2011 22:12:27/28-FEB-2011 02:40:06/' cleared
                  FROM DUAL
                UNION
                SELECT '10100000-2LU',
                       '01-FEB-2011 12:15:58/06-FEB-2011 07:00:53/18-FEB-2011 22:04:56/19-FEB-2011 10:36:12/19-FEB-2011 11:03:13/19-FEB-2011 11:16:14/28-FEB-2011 01:25:22/',
                       '05-FEB-2011 10:05:48/06-FEB-2011 10:49:18/18-FEB-2011 22:15:17/19-FEB-2011 10:41:35/19-FEB-2011 11:08:18/19-FEB-2011 11:21:35/28-FEB-2011 02:40:13/'
                  FROM DUAL)
      SELECT *
        FROM (SELECT NE, raised, cleared
                FROM t
              MODEL RETURN UPDATED ROWS
                 PARTITION BY (NE)
                 DIMENSION BY (0 d)
                 MEASURES (raised, cleared)
                 RULES
                    ITERATE (1000) UNTIL raised[ITERATION_NUMBER] IS NULL
                    (raised [ITERATION_NUMBER + 1] =
                          REGEXP_SUBSTR (raised[0],
                                         '[^/]+',
                                         1,
                                         ITERATION_NUMBER + 1),
                    cleared [ITERATION_NUMBER + 1] =
                          REGEXP_SUBSTR (cleared[0],
                                         '[^/]+',
                                         1,
                                         ITERATION_NUMBER + 1)))
       WHERE raised IS NOT NULL
    ORDER BY NE
    

    Published by: pollywog on March 29, 2011 10:34

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