How to take a derivative of a signal in Labview Fpga

How to make derivative of a position signal acquiring using AI module of cRIO to get the velocity signal.
I got one example in forum and i m attaching that, bt i need to implement this in FPGA.
Note : The position is varying at 30Hz to 80Hz Freq.
Attachments:
derivative.jpg ‏48 KB
derivative.jpg ‏48 KB

I forgot to mention that one problem with numerical differentiation is that if you have a noisy signal, the noise is amplified!
You can try implementing a moving average or median filter in the FPGA code. There are a number of previous threads and Community posts on these, ranging from simple implementations to more complex ones. Try using the search function at the top of the page to look for them.
Of course, it's easier to acquire the raw data, send it to the RT host and do your processing there, depending on resources.
Regarding the sampling time, you have hopefully set this via the tick delay you set in the FPGA acquisition loop.
CLD

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Calculer période signal avec labview FPGA

Bonjour,
je cherche à calculer la période/la fréquence d'un signal d'un couplemètre avec sortie fréquentielle < 5-10>kHz, en utilisant le labview FPGA.

Bonjour Addoula,
Merci d'avoir posté sur le forum National instruments.
Pour réaliser une mesure de fréquence ou de période, il est courant d'utiliser un ou plusieurs compteurs.
Au lien ci-dessous, vous trouvez un document expliquant les techniques pour effectuer ce genre de mesure:
http://www.ni.com/white-paper/7111/fr/
Pour réaliser un compteur avec labview FPGA, le document suivant vous montre un petit exemple:
http://www.ni.com/white-paper/2993/fr/
Bonne journée.
Cordialement
Aurélien Corbin
National Instruments France
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How to take a derivative of a sine wave?

I know this is probably really simple and I am sure I am doing something stupid but please could someone help me..
I am just trying to plot the derivative of a sine wave on the same graph as the original sine wave. It seems to be working (it is displaying a cosine wave) but the amplitude is way off.
Please could someone just point to me why the amplitude is off.. the original sine wave is going between 1 and -1 but the derivative is between 60 and -60
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Go to Solution.

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Coincidence?
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1,2,3,4,5,6,7,8,9,10,(reset),1,2,3,4,5,6,7,8,9,10,(reset),1,2...
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NLS_TERRITORY AMERICA
NLS_CURRENCY $
NLS_ISO_CURRENCY AMERICA
NLS_NUMERIC_CHARACTERS .,
NLS_CHARACTERSET UTF8
NLS_CALENDAR GREGORIAN
NLS_DATE_FORMAT DD-MON-RR
NLS_DATE_LANGUAGE AMERICAN
NLS_SORT BINARY
NLS_TIME_FORMAT HH.MI.SSXFF AM
NLS_TIMESTAMP_FORMAT DD-MON-RR HH.MI.SSXFF AM
NLS_TIME_TZ_FORMAT HH.MI.SSXFF AM TZR
NLS_TIMESTAMP_TZ_FORMAT DD-MON-RR HH.MI.SSXFF AM TZR
NLS_DUAL_CURRENCY $
NLS_COMP BINARY
NLS_LENGTH_SEMANTICS BYTE
NLS_NCHAR_CONV_EXCP FALSE
NLS_NCHAR_CHARACTERSET UTF8
NLS_RDBMS_VERSION 10.2.0.1.0
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NLS_LANGUAGE AMERICAN
NLS_TERRITORY AMERICA
NLS_CURRENCY $
NLS_ISO_CURRENCY AMERICA
NLS_NUMERIC_CHARACTERS .,
NLS_CHARACTERSET UTF8
NLS_CALENDAR GREGORIAN
NLS_DATE_FORMAT DD-MON-RR
NLS_DATE_LANGUAGE AMERICAN
NLS_SORT BINARY
NLS_TIME_FORMAT HH.MI.SSXFF AM
NLS_TIMESTAMP_FORMAT DD-MON-RR HH.MI.SSXFF AM
NLS_TIME_TZ_FORMAT HH.MI.SSXFF AM TZR
NLS_TIMESTAMP_TZ_FORMAT DD-MON-RR HH.MI.SSXFF AM TZR
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Export file created by EXPORT:V09.02.00 via conventional path
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import server uses UTF8 character set (possible charset conversion)
export server uses AL16UTF16 NCHAR character set (possible ncharset conversion)
. importing JW_OR's objects into JW_OR
. importing JW_OS's objects into JW_OS
. importing JW_ADMIN's objects into JW_ADMIN
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. . importing table                  "AUTHORLINKS"     790450 rows imported
. . importing table                      "AUTHORS"      79500 rows imported
. . importing table                       "CATSOL"      25505 rows imported
. . importing table               "CATSOLSYNONYMS"      80045 rows imported
. . importing table                "CHAPTERTITLES"        133 rows imported
. . importing table                "COMPOUNDLINKS"     601785 rows imported
. . importing table                   "CONDITIONS"     207445 rows imported
. . importing table                     "JOURNALS"       2327 rows imported
. . importing table                     "LANGUAGE"          0 rows imported
. . importing table                     "MAINDATA"     234659 rows imported
. . importing table                      "MOLDATA"     721174 rows imported
. . importing table                   "PLAN_TABLE"          1 rows imported
. . importing table                   "REFERENCES"     276783 rows imported
. . importing table                        "ROLES"          2 rows imported
. . importing table                  "RXNKEYLINKS"    1724404 rows imported
. . importing table                  "RXNKEYWORDS"        848 rows imported
. . importing table                  "TABLETITLES"       2400 rows imported
. . importing table                   "TEMP_TABLE"     165728 rows imported
. . importing table          "TEMP_WILEY_MAINDATA"     155728 rows imported
. . importing table           "TEMP_WILEY_PDF_MAP"      16672 rows imported
. . importing table      "TEMP_WILEY_YEAR_VOL_MAP"         42 rows imported
. . importing table                  "WEX_ACCRXNS"       3465 rows imported
. . importing table              "WEX_AUTHORLINKS"      14183 rows imported
. . importing table                  "WEX_AUTHORS"      79500 rows imported
. . importing table            "WEX_CHAPTERTITLES"        133 rows imported
. . importing table            "WEX_COMPOUNDLINKS"      10925 rows imported
. . importing table               "WEX_CONDITIONS"       5297 rows imported
. . importing table                 "WEX_JOURNALS"       2327 rows imported
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. . importing table                 "WEX_MAINDATA"       3465 rows imported
. . importing table                  "WEX_MOLDATA"      10358 rows imported
. . importing table               "WEX_REFERENCES"       3795 rows imported
. . importing table              "WEX_RXNKEYLINKS"      34540 rows imported
. . importing table              "WEX_RXNKEYWORDS"        848 rows imported
. . importing table              "WEX_TABLETITLES"       2400 rows imported
. . importing table           "WEX_WILEY_HTML_MAP"      17316 rows imported
. . importing table           "WEX_WILEY_MAINDATA"       3465 rows imported
. . importing table            "WEX_WILEY_PDF_MAP"      23925 rows imported
. . importing table       "WEX_WILEY_YEAR_VOL_MAP"         58 rows imported
. . importing table               "WILEY_HTML_MAP"      17316 rows imported
. . importing table               "WILEY_MAINDATA"     234659 rows imported
. . importing table                "WILEY_PDF_MAP"      23925 rows imported
. . importing table           "WILEY_YEAR_VOL_MAP"         58 rows imported
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. . importing table                   "ATMOSPHERE"         47 rows imported
. . importing table                  "AUTHORLINKS"      33276 rows imported
. . importing table                      "AUTHORS"       6555 rows imported
. . importing table                       "CATSOL"       1463 rows imported
. . importing table               "CATSOLSYNONYMS"       9370 rows imported
. . importing table                    "CHEMICALS"      78197 rows imported
. . importing table                "COMPOUNDLINKS"      20799 rows imported
. . importing table                       "EXPDET"          1 rows imported
. . importing table                    "FOOTNOTES"      77825 rows imported
. . importing table                     "JOURNALS"          2 rows imported
. . importing table                     "LANGUAGE"          2 rows imported
. . importing table                     "MAINDATA"       7116 rows imported
. . importing table                     "PATHSTEP"       7199 rows imported
. . importing table               "PROCEDURENOTES"      77293 rows imported
. . importing table                        "ROLES"          2 rows imported
. . importing table                  "RXNKEYLINKS"      23096 rows imported
. . importing table                  "RXNKEYWORDS"       1272 rows imported
. . importing table                  "WEX_ACCRXNS"        135 rows imported
. . importing table               "WEX_ATMOSPHERE"         47 rows imported
. . importing table              "WEX_AUTHORLINKS"        613 rows imported
. . importing table                  "WEX_AUTHORS"       6555 rows imported
. . importing table                "WEX_CHEMICALS"          0 rows imported
. . importing table            "WEX_COMPOUNDLINKS"        497 rows imported
. . importing table                   "WEX_EXPDET"          1 rows imported
. . importing table                "WEX_FOOTNOTES"       2184 rows imported
. . importing table                 "WEX_JOURNALS"          2 rows imported
. . importing table                 "WEX_LANGUAGE"          2 rows imported
. . importing table                 "WEX_MAINDATA"        135 rows imported
. . importing table                 "WEX_PATHSTEP"        135 rows imported
. . importing table           "WEX_PROCEDURENOTES"       2253 rows imported
. . importing table              "WEX_RXNKEYLINKS"        695 rows imported
. . importing table              "WEX_RXNKEYWORDS"       1272 rows imported
. importing JW_ADMIN's objects into JW_ADMIN
. . importing table                     "APP_USER"         76 rows imported
. . importing table                       "AUTHOR"      61874 rows imported
. . importing table                     "CITATION"
IMP-00019: row rejected due to ORACLE error 12899
IMP-00003: ORACLE error 12899 encountered
ORA-12899: value too large for column "JW_ADMIN"."CITATION"."PAGE" (actual: 9, maximum: 8)
Column 1 10794
Column 2 77
Column 3 1
Column 4 24
Column 5
Column 6 Science of Synthesis
Column 7 Negishi, E.-i.; Takahashi, T. Science of Synthesis...
Column 8 681–848
Column 9 2
Column 10
Column 11 2002
IMP-00019: row rejected due to ORACLE error 12899
IMP-00003: ORACLE error 12899 encountered
ORA-12899: value too large for column "JW_ADMIN"."CITATION"."PAGE" (actual: 10, maximum: 8)
Column 1 10879
Column 2 77
Column 3 1
Column 4 110
Column 5
Column 6 Comprehensive Organic Synthesis
Column 7 Hiemstra, H.; Speckamp, W. N.; Trost, B. M.; Flemi...
Column 8 1047–108
Column 9 2
Column 10
Column 11
IMP-00019: row rejected due to ORACLE error 12899
IMP-00003: ORACLE error 12899 encountered
ORA-12899: value too large for column "JW_ADMIN"."CITATION"."PAGE" (actual: 10, maximum: 8)
Column 1 10880
Column 2 77
Column 3 1
Column 4 111
Column 5
Column 6 Houben-Weyl Methods of Organic Chemistry
Column 7 De Koning, H.; Speckamp, W. N.; Helmchen, G.; Hoff...
Column 8 1953–200
Column 9 E21b
Column 10
Column 11 1995
IMP-00019: row rejected due to ORACLE error 12899
IMP-00003: ORACLE error 12899 encountered
ORA-12899: value too large for column "JW_ADMIN"."CITATION"."PAGE" (actual: 10, maximum: 8)
Column 1 10904
Column 2 77
Column 3 1
Column 4 135
Column 5
Column 6 Houben-Weyl Methods of Organic Chemistry
Column 7 Ryu, I.; Murai, S.; de Meijere, A., Ed. Houben-Wey...
Column 8 1985–204
Column 9 E17c
Column 10
Column 11 1997
IMP-00019: row rejected due to ORACLE error 12899
IMP-00003: ORACLE error 12899 encountered
ORA-12899: value too large for column "JW_ADMIN"."CITATION"."PAGE" (actual: 9, maximum: 8)
Column 1 10905
Column 2 77
Column 3 1
Column 4 136
Column 5
Column 6 The Chemistry of the Cyclopropyl Group
Column 7 Tsuji, T.; Nishida, S.; Patai, S.; Rappoport, Z., ...
Column 8 307–373
Column 9
Column 10
Column 11 1987
IMP-00019: row rejected due to ORACLE error 12899
IMP-00003: ORACLE error 12899 encountered
ORA-12899: value too large for column "JW_ADMIN"."CITATION"."PAGE" (actual: 10, maximum: 8)
Column 1 10906
Column 2 77
Column 3 1
Column 4 137
Column 5
Column 6 The Chemistry of the Cyclopropyl Group
Column 7 Vilsmaier, E.; Patai, S.; Rappoport, Z., Eds. The ...
Column 8 1341–145
Column 9
Column 10
Column 11 1987
IMP-00019: row rejected due to ORACLE error 12899
IMP-00003: ORACLE error 12899 encountered
ORA-12899: value too large for column "JW_ADMIN"."CITATION"."PAGE" (actual: 9, maximum: 8)
Column 1 10952
Column 2 77
Column 3 1
Column 4 183
Column 5
Column 6 Cyclopropane-Derived Reactive Intermediates
Column 7 Boche, G.; Walborsky, H. M. Cyclopropane-Derived R...
Column 8 117–173
Column 9
Column 10
Column 11 1990
IMP-00019: row rejected due to ORACLE error 12899
IMP-00003: ORACLE error 12899 encountered
ORA-12899: value too large for column "JW_ADMIN"."CITATION"."PAGE" (actual: 10, maximum: 8)
Column 1 10958
Column 2 77
Column 3 1
Column 4 189
Column 5
Column 6 Houben-Weyl Methods of Organic Chemistry
Column 7 Klunder, A. J. H.; Zwanenburg, B. Houben-Weyl Meth...
Column 8 2419–243
Column 9 E17c
Column 10
Column 11 1997
IMP-00019: row rejected due to ORACLE error 12899
IMP-00003: ORACLE error 12899 encountered
ORA-12899: value too large for column "JW_ADMIN"."CITATION"."PAGE" (actual: 9, maximum: 8)
Column 1 10995
Column 2 77
Column 3 1
Column 4 226
Column 5
Column 6 Science of Synthesis
Column 7 Cha, J. K. Science of Synthesis 2005, 325–338.
Column 8 325–338
Column 9
Column 10
Column 11 2005
IMP-00019: row rejected due to ORACLE error 12899
IMP-00003: ORACLE error 12899 encountered
ORA-12899: value too large for column "JW_ADMIN"."CITATION"."PAGE" (actual: 10, maximum: 8)
Column 1 17123
Column 2 82
Column 3 1
Column 4 13
Column 5
Column 6 Comprehensive Organometallic Chemistry II
Column 7 Dushin, R. G.; Edward, W. A.; Stone, F. G. A.; Wil...
Column 8 1071–109
Column 9 12
Column 10
Column 11 1995
IMP-00019: row rejected due to ORACLE error 12899
IMP-00003: ORACLE error 12899 encountered
ORA-12899: value too large for column "JW_ADMIN"."CITATION"."PAGE" (actual: 9, maximum: 8)
Column 1 17124
Column 2 82
Column 3 1
Column 4 14
Column 5
Column 6 Modern Carbonyl Olefination
Column 7 Ephritikhine, M.; Villiers, C.; Takeda, T. Ed. Mod...
Column 8 223–285
Column 9
Column 10
Column 11 2004
IMP-00019: row rejected due to ORACLE error 12899
IMP-00003: ORACLE error 12899 encountered
ORA-12899: value too large for column "JW_ADMIN"."CITATION"."PAGE" (actual: 9, maximum: 8)
Column 1 17126
Column 2 82
Column 3 1
Column 4 16
Column 5
Column 6 Transition Metals for Organic Synthesis (2nd Editi...
Column 7 Furstner, A.; Beller, M.; Bolm, C. Eds. Transition...
Column 8 449–468
Column 9
Column 10
Column 11 2004      17712 rows imported
. . importing table                     "FOOTNOTE"         38 rows imported
. . importing table              "GT_STATS_REPORT"          0 rows imported
. . importing table         "GT_VALIDATION_REPORT"          0 rows imported
. . importing table                     "OR_USERS"          1 rows imported
. . importing table                     "OS_USERS"          1 rows imported
. . importing table                "PROCEDURENOTE"         70 rows imported
. . importing table                  "QC_TRACKING"     539881 rows imported
. . importing table                         "ROLE"          5 rows imported
. . importing table                       "SCHEMA"          3 rows imported
. . importing table              "TASK_ALLOCATION"     159370 rows imported
. . importing table                     "USER_LOG"     174488 rows imported
. . importing table                      "VERSION"          3 rows imported
About to enable constraints...
IMP-00017: following statement failed with ORACLE error 2298:
"ALTER TABLE "AUTHOR" ENABLE CONSTRAINT "FK_AUTHOR_CITATIONID""
IMP-00003: ORACLE error 2298 encountered
ORA-02298: cannot validate (JW_ADMIN.FK_AUTHOR_CITATIONID) - parent keys not found
Import terminated successfully with warnings.
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Good morning, i would like to know how to take pictures from iphoto and put them in a folder on desktop

Good morning: would like to know how to take pictures from my iphoto and put them in a folder on my desktop

To take photos from iPhoto and put them onto a folder on Desktop, first create a folder on Desktop. Right-click on Desktop and create a new folder.
Then, open iPhoto, and you have two ways to export photos:
1. Select the photos you want to copy to Desktop with Command key (or go to Edit menu > Select All, if you want to copy all photos), and then, drag them to the folder on Desktop.
2. Select the photos you want to copy to Desktop with Command key, go to File menu > Export, and follow the steps.
You can choose the one you prefer

How to take square root of it

Hi Folks!
Can anybody tell me how to take square root of this value "bi"?
BigInteger bi = BigInteger.valueOf(2000000000);
Thanks in advance.

I wrote this simple sqrt function for BigInteger.
* Returns the largest BigInteger, n, such that bigInt>=n*n.
* If round is true, the function returns n+1 if it is closer to actual square root.
* @param round if true, attempt to find a closer value by rounding up.
* @return <tt>round ? round(sqrt(bigInt)) : floor(sqrt(bigInt))</tt>
public static BigInteger sqrt(BigInteger bigInt, boolean round){
     BigInteger op = bigInt;
     BigInteger res = BigInteger.ZERO;
     BigInteger tmp;
     int shift = bigInt.bitLength()-1;
     shift -= shift&1;
     // set one to highest power of 4 <= bigInt
     BigInteger one = BigInteger.ONE.shiftLeft(shift);
     while(one.signum()>0){
          tmp = res.add(one);
          if(op.compareTo(tmp)>=0){
               op = op.subtract(tmp);
               res = res.add(one.shiftLeft(1));
          res = res.shiftRight(1);
          one = one.shiftRight(2);
     if(round&&op.signum()!=0){
          op = bigInt.subtract(res.pow(2));
          if(op.compareTo(res)>0){
               res = res.add(BigInteger.ONE);
     return res;
}

How to take a report for the assigned transaction and activity in a role

Hi Colleagues,
I want to take a report for the assigned transaction with activity for all roles, which are assigned to the users,
Transaction list for a role i can able to take it from SUIM but not able to take the ACTVT for the role.
Please suggest how to take this information.
BR,
Jai

Hi Jaikumar from the post :
I think you have reached the state of finding the USER to ROLE relationship
Take the output to an excel,
COPY just the roles column exactly in order do not rearrange , use AGR_1251 like other experts have mentioned
insert the roles copied from you buffer and execute, the output will have multiple entries for each role take the output to an EXCEL again , make it unique and match the outputs between both the EXCELS.
It will be a little tricky to do this, but I think you are proficient in MS EXCEL.
This is one of the ways to do , there are many other ways to do it.

How to take a derivative of a signal in Labview Fpga

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