How to count time between two pulses

Hello everyone,
I want to count time between two boolean pulses? Can anyone give me an advice? Thank you in advance!

Hello Michael78,
You've right. I have a DAQ board and i want to acquire torque and angle (from a torque transducer). I already done that, but sometimes it doesn't work properly. To acquire this, i count sign changing of the torque to acquire exactly one period (3 sign changing). Torque have a noise, and when passes through zero, count more than 3 sign changing at a time, and this stop my acquisition (figure 2). I want to set a time between 2 counting sign . I tried something with tick count...but i made something wrong . I hope you understand me....
Attachments:
Capture.PNG ‏51 KB
Capture2.PNG ‏47 KB
Capture3.PNG ‏123 KB

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LabVIEW/SignalExpress: How can I automate measuring the time between two pulses?

Hi everyone, bit of a newbie here so please bear with me.
I'm a student at a university conducting a muon decay experiment with an oscilloscope connected to some photomultipliers. To summarize, if a muon enters the detector it will create a very small width pulse (a few ns). Within a period of 10µs it may decay, creating a second pulse. The oscilloscope triggers on the main pulse 5-15 times per second, and a decay event happens roughly 1-2 times per minute. I am trying to collect 10 hours of data (roughly 1500-2000 decay events) and measure the time it takes for each decay.
I've been able to set recording conditions in SignalExpress that starts recording on the first pulse and stops recording on the last. The Tektronix TDS 1012 oscilloscope however feeds 2500 points of data from this snapshot into a text file (for use in excel or other software). Even if I perfectly collected the data, I would have 100,000+ data points and it would be too much to handle. I don't know how (or if it's possible) to reduce the sample size.
To conclude, using Labview or SignalExpress, I would like to be able to have the software
1. Differentiate between the single pulse detections and double pulse decay events
2. Record only when two pulses appear on the oscilloscope
3. Measure the time between these two pulses and ONLY that to minimize the amount of data recorded.
Any help would be GREATLY appreciated, thanks!

Hi wdavis8,
I am not that familiar with Tektronix, but there should be a place in the dialog that you go through when you create the action step to acquire date to specify a sampling rate. That would allow you to reduce the number of data points you are seeing, but may reduce the quality of the data.
If it’s just a matter of that much data being hard to dig through when you have that many points, you could do some analysis on the data after the fact, and then create a new file with only the data you want to look at. For example, you could identify the peaks in the data, and based on the distance between them or the difference in magnitude, selectively write data to a new file.
Here is some information about peak detection in LabVIEW:
http://www.ni.com/white-paper/3770/en/
You could also do some downsampling on the data to get fewer data points:
https://decibel.ni.com/content/docs/DOC-23952
https://decibel.ni.com/content/docs/DOC-28976
Those are just a few quick ideas.
Kelsey J
Applications Engineer

How to count days between two dates excluding saterady and sunday

Hi all
iam working on oracle sql/plsql.
In my application , i need to caliculate leave days between two dates excluding saterady and sunday
Please tell me the solution if any one knows
thanks in advance ,
balu

More modern version:
WITH date_tab AS
(SELECT TO_DATE ('&from_date', 'dd-MON-yyyy')
+ LEVEL
- 1 business_date
FROM DUAL
CONNECT BY LEVEL <=
TO_DATE ('&to_date', 'dd-MON-yyyy')
- TO_DATE ('&from_date', 'dd-MON-yyyy')
+ 1)
SELECT business_date
FROM date_tab
WHERE TO_CHAR (business_date, 'DY') NOT IN ('SAT', 'SUN');Thank you,
Tony Miller
Webster, TX
Never Surrender Dreams!
JMS
If this question is answered, please mark the thread as closed and assign points where earned..

How to Calculate the Time Between two days in ABAP

Hi,
              I have one scenario like i need to calculate the time between two days please can you suggest me.
Thanks,
Harinath

Hi Peeleti,
            Check this code,
DATA : DATE1 LIKE SY-DATUM VALUE '19830125',
       DATE2 LIKE SY-DATUM VALUE '20070219',
       DAYS1 TYPE I,
       WEEK1 TYPE I,
       MONTH1 TYPE I,
       YEAR1 TYPE I,
       C_YEARS1 TYPE I.
CALL FUNCTION 'HR_99S_INTERVAL_BETWEEN_DATES'
EXPORTING
BEGDA           = DATE1
   endda           = DATE2
TAB_MODE        = ' '
IMPORTING
DAYS            = DAYS1
C_WEEKS         =
C_MONTHS        = C_YEARS1
C_YEARS         = C_YEARS1
WEEKS           = WEEK1
MONTHS          = MONTH1
YEARS           = YEAR1.
D_MONTHS        =
MONTH_TAB       =
*WRITE : / 'DAYS   = ', DAYS1,
        / 'WEEKS = ',WEEK1,
      / 'MONTHS = ', MONTH1,
      / 'YEARS   = ', YEAR1.
Using this code you can calculate the No Of Days Between two dates. Based On days you will easily calculate the Hour. [ No of days * 24 ].
Thanks.
Reward If helpful.

How to caluclate tat between two dates of one timestamp field

Hi,
could some one help how to caluclate days between two dates of single timestamp filed and with this
query
Select * from m_activity_transaction where actn_opp_id in (
Select actn_opp_id from m_activity_transaction where ACTN_ACTV_ID = 218
Group by actn_opp_id
having count(*) > 1 ) and ACTN_ACTV_ID = 218
order by actn_performed_on
iam getting output is
ACTN_ID ACTN_OPP_ID ACTN_PERFORMED_ON
319415 95831 27-JAN-12 11.06.20.000000 AM
315249 95831 08-FEB-12 05.32.54.000000 PM
301927 103509 20-DEC-11 04.01.43.000000 PM
301458 103509 19-DEC-11 04.51.03.000000 PM
294841 115840 10-JAN-12 03.20.12.000000 PM
312062 115840 11-JAN-12 05.17.06.000000 PM
and i nedd to caluclate no.of days between two dates like 27-JAN-12 11.06.20.000000 AM and 08-FEB-12 05.32.54.000000 PM where actn_id is unique AND ACTN_OPP_ID IS NOT UNIQUE.
Thanks in Advance,
vvr.

This way?
with data as
select 315249 a, 95831 b, to_timestamp('27-JAN-12 11.06.20.000000 AM', 'DD-MON-RR HH.MI.SS.FF6 AM') dt from dual union all
select 319415, 95831, to_timestamp('08-FEB-12 05.32.54.000000 PM', 'DD-MON-RR HH.MI.SS.FF6 AM') from dual union all
select 301927, 103509 , to_timestamp('20-DEC-11 04.51.03.000000 PM', 'DD-MON-RR HH.MI.SS.FF6 AM') from dual union all
select 301458 , 103509 , to_timestamp('19-DEC-11 04.01.43.000000 PM', 'DD-MON-RR HH.MI.SS.FF6 AM') from dual union all
select 363810 , 144656 , to_timestamp('27-JUN-12 12.43.28.000000 PM', 'DD-MON-RR HH.MI.SS.FF6 AM') from dual union all
select 363500 , 144656 , to_timestamp('26-JUN-12 11.41.50.000000 AM', 'DD-MON-RR HH.MI.SS.FF6 AM') from dual union all
select 363354 , 144656 , to_timestamp('25-JUN-12 12.41.13.000000 PM', 'DD-MON-RR HH.MI.SS.FF6 AM') from dual
select a, b, diff
from (
        select a, b, extract( day from (dt - lag(dt) over (partition by b order by dt, a)) ) diff
          from data
       ) tab
where tab.diff is not null;
A                      B                      DIFF
319415                 95831                  12
301927                 103509                 1
363500                 144656                 0
363810                 144656                 1

How to check similarity between two Databases 9i & 10g after imp in 10g

Dear all,
Source
=======
OS server     ==>     HP-UX
Oracle version     ==>     Oracle 9.2.0.8
DB Name          ==>     MSST
DB total users     ==>     320
Full export in     ==>     /u02/export/Jan09.dmp
Tablespaces     ==>     SC, SC_I, SA, SA_I, PP, PP_I, AC, AC_I, SD
Destination
============
OS server          ==>     HP-UX
DB Name               ==>     CHDB
Existg DB users          ==>     20
Oracle version          ==>     Oracle 10.2.0.4
copied 9i dump file in     ==>     /u03/export
Tablespaces created same as Oracle 9i i.e;
Tablespaces     ==>     SC, SC_I, SA, SA_I, PP, PP_I, AC, AC_I, SD
I had run full import on Destination server i.e; Oracle 10g & following is the command i used:
imp system/pwd@conn_string file=/u03/export/Jan09.dmp log=/u03/export/Jan09_imp.log full=y ignore=y statistics=none
*=== Imported successfully with few errors like ====*
IMP-00017: following statement failed with ORACLE error 2299:
"ALTER TABLE "EMP_PROMOTIONS_ORD" ADD CONSTRAINT "EMP_PROMOTIONS_ORD_UK" UN"
"IQUE ("EMP_NO", "RANK_NO_FOLLOW") USING INDEX PCTFREE 10 INITRANS 2 MAXTRAN"
"S 255 STORAGE(INITIAL 65536 FREELISTS 1 FREELIST GROUPS 1) TABLESPACE "PP" "
"LOGGING ENABLE "
IMP-00003: ORACLE error 2299 encountered
ORA-02299: cannot validate (PP.EMP_PROMOTIONS_ORD_UK) - duplicate keys found
ORA-02299: cannot validate (PP.EMP_PROMOTIONS_ORD_UK) - duplicate keys found
. . importing table "EMP_PROMOTION_DETAILS" 13333 rows imported
. . importing table "EMP_PROMOTION_MAST" 725 rows imported
. . importing table "EMP_PUNISHMENT" 271 rows imported
. . importing table "EMP_REPORT_BOOKS" 60528 rows imported
. . importing table "EMP_SALARY_HISTORIES" 120871 rows imported
. . importing table "EMP_SALARY_HISTORIES_TEMP" 77044 rows imported
. . importing table "EMP_TRANSACTIONS" 96536 rows imported
IMP-00017: following statement failed with ORACLE error 2299:
"ALTER TABLE "EMP_TRANSACTIONS" ADD CONSTRAINT "TRANS_UK" UNIQUE ("EMP_NO","
" "DIR_NO", "DIR_DATE", "TRN_CODE") USING INDEX PCTFREE 10 INITRANS 2 MAXTRA"
"NS 255 STORAGE(INITIAL 65536 FREELISTS 1 FREELIST GROUPS 1) TABLESPACE "PP_"
"I" NOLOGGING ENABLE "
IMP-00003: ORACLE error 2299 encountered
ORA-02299: cannot validate (PP.TRANS_UK) - duplicate keys found
Now my question is
===================
How to check everything is same/similar like Oracle 9i database ( source ), for example ( i used this technique ):
Can anyone tell me how to check similarity between two Databases 9i & 10g after import in 10g.
MSST_DB>SHOW USER
MSST_DB>SA
MSST_DB>select object_type, count(*) from user_objects group by objects;
OBJECT_TYPE     COUNT(*)
DATABASE LINK     2
FUNCTION     23
INDEX          1795
LOB          6
PACKAGE          8
PACKAGE BODY     8
PROCEDURE     30
SEQUENCE     67
SYNONYM          60
TABLE          644
TRIGGER          3
VIEW          20
CHDB_DB>SHOW USER
CHDB_DB>SA
CHDB_DB>select object_type, count(*) from user_objects group by objects;
OBJECT_TYPE     COUNT(*)
INDEX          1794
PROCEDURE     30
TABLE          644
TRIGGER          3
VIEW          20
FUNCTION     23
SYNONYM          60
PACKAGE BODY     8
SEQUENCE     67
PACKAGE          8
LOB          6
Edited by: VIKHARAHMED on Jan 10, 2012 3:02 AM

[url http://download.oracle.com/docs/cd/B19306_01/server.102/b14215/dp_export.htm#sthref67]Guide.

Count time between 2 readings from serial port... help!.

Hi guys,
I am using my application to get the readings sent by microcontroller from serial port. It works perfectly. But i have the problem, the pic uses 16bits counter, and sometimes i measure frequency lower than 15hz (65535-->16bits). Thats why I thought to measure the time between each pulse that it recieved in serial port. So i could multiply the reading about the time which spend in arrive to serial port. I know if any pulse spend more than 15hz, i should add 65535 to this reading.
Then, the idea is count the time spent between each reading in serial port. SInce pics count and later send each turn.
I dont know if it is possible, and exist any easy way.. Can ayone help me?.
I would like to see any example of it, always it is possible.
Regards, Fonsi.
Attachments:
capture.GIF ‏19 KB

You're not going to be able to get even close to 1 usec resolution using the built-in time functions though I don't see any of those in your attachment. The windows clock is simply not that accurate. If you need to precisely time your serial reads you might want to look at using the timed loop. You can set the period of that to 1 msec.

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How to pass data between two internal sessions using ABAP memory?
It would be fine if you could explain with an example.
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Hi ,
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DATA TEXT1(10) VALUE 'Exporting'.
DATA ITAB LIKE SBOOK OCCURS 10 WITH HEADER LINE.
DO 5 TIMES.
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ENDDO.
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TEXT2 FROM 'Literal'
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EXPORT ITAB
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and
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Pls. reward if useful.....

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*** This response contains a reference to a third party World Wide Web site. Microsoft is providing this information as a convenience to you. Microsoft does not control
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How to count time between two pulses

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