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koartem81
Germany
7 Posts |
 Posted - 06/20/2014 : 09:26:39 AM
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Hello there!
I have obtained some measurements for SINUSOIDAL signals of curren and voltage (f=50 Hz, Urms~230 V). Time perion is 5 seconds, time step 5e-6 seconds.
Please, How can I get now in Origin Pro 9.0 easy a diagramm of Root mean square (RMS) for TRANSIENT SINUSOIDAL signals of curren and voltage?
Thank you in advance.
Kind regards,
Artem
Origin Pro 9.0
Operating System: windows 7 |
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lkb0221
China
497 Posts |
Posted - 06/20/2014 : 11:42:43 AM
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Hi,
We have rms() function to calculate RMS value of a column.
What is the relationship between the sinusoidal signal and the transient sinusoidal signal you want? A transfer function maybe?
In a word, once you have your transient sinusoidal signal column, you can directly calculate it's rms by, for example, rms(col(B)).
Zheng
OriginLab |
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koartem81
Germany
7 Posts |
Posted - 07/18/2014 : 05:30:16 AM
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Hello,
I have to calculate RMS value of a transient voltage signal step by step (about 50 values per unit in the column), but not of a whole column. The coloumn has about 5000000 values. I have to show these RMS values like a diagramm (like a RMS value of voltage diagramm).
How can I do it in Origin?
Thank you very much!
Hi,
We have rms() function to calculate RMS value of a column.
What is the relationship between the sinusoidal signal and the transient sinusoidal signal you want? A transfer function maybe?
In a word, once you have your transient sinusoidal signal column, you can directly calculate it's rms by, for example, rms(col(B)).
Zheng
OriginLab
[/quote] |
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lkb0221
China
497 Posts |
Posted - 07/18/2014 : 10:21:23 AM
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Hi,
I'm afraid some simple script is needed.
What do you mean "about 50 values per unit in the column"? The length is not fixed?
It will be helpful if you can send us the opj.
Zheng
OriginLab |
Edited by - lkb0221 on 07/18/2014 10:21:46 AM |
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koartem81
Germany
7 Posts |
Posted - 07/18/2014 : 11:20:24 AM
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Hi,
the length could be fixed or not. It is important, then I consider the chandes of RMS if the voltage go higher or lower.
Could you send me your e-mail? Then I will send you the opj with an example.
Thank you very much!
quote:
Originally posted by lkb0221
Hi,
I'm afraid some simple script is needed.
What do you mean "about 50 values per unit in the column"? The length is not fixed?
It will be helpful if you can send us the opj.
Zheng
OriginLab
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Echo_Chu
China
Posts |
Posted - 07/21/2014 : 06:33:21 AM
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Hi,
You could follow the instructions below to send your file.
http://www.originlab.com/index.aspx?go=Support&pid=752
quote:
Originally posted by koartem81
Hi,
the length could be fixed or not. It is important, then I consider the chandes of RMS if the voltage go higher or lower.
Could you send me your e-mail? Then I will send you the opj with an example.
Thank you very much!
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koartem81
Germany
7 Posts |
Posted - 07/21/2014 : 07:41:11 AM
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Hi,
I have not FTP, it is a little bit difficult for me and the file is 1,5 MB. Could you send me your contact e-mail to koartem@web.de ?
Thank you!
quote:
Originally posted by Echo_Chu
Hi,
You could follow the instructions below to send your file.
http://www.originlab.com/index.aspx?go=Support&pid=752
quote:
Originally posted by koartem81
Hi,
the length could be fixed or not. It is important, then I consider the chandes of RMS if the voltage go higher or lower.
Could you send me your e-mail? Then I will send you the opj with an example.
Thank you very much!
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koartem81
Germany
7 Posts |
Posted - 07/21/2014 : 07:48:48 AM
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Hi Echo_Chu,
you can try to download the file in
http://originlab.com/FileExchange/index.aspx?C=1&CID=20
RMS Data
The red line is what I want to have.
quote:
Originally posted by koartem81
Hi,
I have not FTP, it is a little bit difficult for me and the file is 1,5 MB. Could you send me your contact e-mail to koartem@web.de ?
Thank you!
quote:
Originally posted by Echo_Chu
Hi,
You could follow the instructions below to send your file.
http://www.originlab.com/index.aspx?go=Support&pid=752
quote:
Originally posted by koartem81
Hi,
the length could be fixed or not. It is important, then I consider the chandes of RMS if the voltage go higher or lower.
Could you send me your e-mail? Then I will send you the opj with an example.
Thank you very much!
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Sam Fang
293 Posts |
Posted - 07/22/2014 : 02:42:50 AM
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Thanks for your data file.
In Origin 91, it is very easy, you can use the formula in Set Column Values dialog.
rms(col(A)[(i-1)*50+1:i*50])
Before Formula Scripts:
wks.col2.nrows=int((wks.col1.nrows-1)/50)+1;
In Origin 9.0, you have to use script to loop. You can run following script in Script Window or Set Column Values dialog's Before Formula Scripts box:
wks.ncols=3;
wks.col2.type=4;
int np=50;
int ii;
for( ii=1; (ii-1)*np<wks.col1.nrows; ii++)
{
int m,n;
m=(ii-1)*np+1;
n=(m+np-1>wks.col1.nrows)?wks.col1.nrows:(m+np-1);
col(2)[ii]=5e-6*((m+n)/2.0-1);
range r1=col(A)[$(m):$(n)];
col(3)[ii]=rms(r1);
}
wks.col2.nrows=ii-1;
wks.col3.nrows=ii-1;
We should improve Origin's Reduce by Group tool to support rms results.
Thanks.
Sam
OriginLab Technical Services |
Edited by - Sam Fang on 07/28/2014 03:06:46 AM |
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koartem81
Germany
7 Posts |
Posted - 07/25/2014 : 12:11:00 PM
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Thank you for your answer!
Unfortunately I can not use your script to loop in Origin 9.0. I have an error. Could you send me my file with the calculated RMS diagramm and with the script for Origin 9.0 as an example back? My e-mail: koartem@web.de
Thank you very much!
quote:
Originally posted by Sam Fang
Thanks for your data file.
In Origin 91, it is very easy, you can use the formula in Set Column Values dialog.
rms(col(A)[(i-1)*50+1:i*50])
Before Formula Scripts:
wks.col2.nrows=int((wks.col1.nrows-1)/50)+1;
In Origin 9.0, you have to use script to loop. You can run following script in Script Window or Set Column Values dialog's Before Formula Scripts box:
wks.ncols=3;
wks.col2.type=4;
int np=50;
for( int ii=1; (ii-1)*np<wks.col1.nrows; ii++)
{
int m,n;
m=(ii-1)*np+1;
n=(m+np-1>wks.col1.nrows)?wks.col1.nrows:(m+np-1);
col(2)[ii]=5e-6*((m+n)/2.0-1);
col(3)[ii]=rms(col(A)[$(m):$(n)]);
}
wks.col2.nrows=ii-1;
wks.col3.nrows=ii-1;
We should improve Origin's Reduce by Group tool to support rms results.
Thanks.
Sam
OriginLab Technical Services
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Sam Fang
293 Posts |
Posted - 07/28/2014 : 03:49:34 AM
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I sent the result for 90 to your email. I also corrected my script in the forum.
Thanks.
Sam
Sam
OriginLab Technical Services |
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koartem81
Germany
7 Posts |
Posted - 07/28/2014 : 09:42:43 AM
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Hello sam,
I have got your file. Now it works.
Thank you very much!
quote:
Originally posted by Sam Fang
I sent the result for 90 to your email. I also corrected my script in the forum.
Thanks.
Sam
Sam
OriginLab Technical Services
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Topic |
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RMS for transient voltage and current