Organizing a multiplexer acquired data in a spreadsheet file of a column major order

I am a beginner user of Labview, but I managed to make VI incrementing a running index from 0 to 15 in order to interface with a multiplexer, while providing a predetermined time delay between each cycle of the sixteen iterations. I have just emulated this case study before its practical implementation by constructing a VI saving the analog data acquired from a two analog input ports at each value of the running index in a txt file (File: Multiplexer_Output_Data_Test.pdf). The challenge is how to alternatively store the data in a spreadsheet excel file in which every row has a thirty three cells, or in other words, the first cell has the time stamp, while the next sixteen cells contain the analog data of the first port spanning all the sixteen values of the running index, and the same approach applies for the last sixteen cells associated with the second analog input port. The process repeats itself after the predetermined time delay in the successive rows. In the attached VI, I would like to replace the last frame of saving into text file with my desired form in excel sheet.
Any help would be highly appreciated
Solved!
Go to Solution.
Attachments:
Multiplexer_Output_Data_Test.pdf ‏5 KB
Multiplexer_Data_Acquisition.vi ‏186 KB

steve.bm wrote:
Hi Diaa,
I found this example and I think this applies to your needs. You can find more information about Dynamic Data Exchange here.
Regards,
This is exactly what I am looking for all the past week.
Your help was extremely appreciated and to the point.

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not nay errors appear.
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I tried th "%.11f" format and it worked in the attached VI (6.1). Please respond and attach a small example VI that demonstrates your problem.
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array_test.vi ‏15 KB

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I could not open your VI as I do not have version 6.1 installed. So here are some comments...
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Why is it that when I saved the waveform of my acquired signal into a wav file, the output waveform of my saved file turn out to be different from my input signal?

Hi all,
I am currently doing a heart sound analyzer project. I acquired signal using NI USB 6008 continuosly. My program is able to saved the acquired signal into a wave file. But when I browse open the saved file, the output waveform did not look the same as the acquired input signal and also the sound of the heartbeat captured cannot be heard from the loud speaker though I have saved the file as a wav file. I am not sure if the method i use to save the acquired data as a wav file is correct. I have attach the print screen of the differences of the output I have notice and the program I have created. I would be glad if anyone here is able to troubleshoot my program.
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Attachments:
heart sound analyzer.zip ‏257 KB

Hi Brett Burger,
Thanks for your reply. For your information, I have set the sampling rate as 10000 as for the sound format, I have set the bits per sample as 16 bit, the rate as 11025 and the sound quality as mono. I tried using your method by changing the sampling rate as 8K but still my program encounter the same problem.
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Heart Sounds1.vi ‏971 KB

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Hello,
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Solved!
Go to Solution.
Attachments:
SWIR spectrometer solo save.vi ‏52 KB

That function does not read xls or xlsx files. It reads ASCII spreadsheet files. You could either save your Excel file as a CSV (File->Save As, then change the type to CSV) or a text file and use that VI. Or you can use some ActiveX commands to read the data from Excel. Changing the file type is a lot easier.
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Using JTables to display data from a text file

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dont quite get the "vectors" part..
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* Damn Java ..
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How to acquire data through multiple channels in parallel using PXI 6070 E, PXI 4071 and LabVIEW?

Hi,
I am using NI LabVIEW, NI PXI 4071, and NI PXI 6070E to measure current through a variable resistance. Now, I am using one channel from SCB-68, but I want to add another channel in parallel so that I can have two resistors instead of one that I cam measure current through them.
I have attached a Pdf file showing the setup for hardware in use and LabVIEW code also.
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Thanks in advance.
Best Regards,
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Solved!
Go to Solution.
Attachments:
IV copy for HS.vi ‏55 KB
Layout of NI Cards.pdf ‏248 KB

Your 4071 can only do one measurement at a time. Your DAQ cannot measure resistance either nor has it got any analogue inputs.
However, you could use a multiplexer and multiplex your 4071 DMM. This wont give you simultaneous measurements but can acquire data one after the other, the speed is obviously dependent on the multiplexer you choose!
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Trying to insert data into a spreadsheet on the fly

I'm sure this is a very basic question, but I came into the project I'm
doing this semester with no LabVIEW experience, and I've just taught
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RIght now, I'm trying to calibrate a pyrometer with a thermocouple
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Hi,
I am not sure why you are even doing any array operations. You can simply connect the output of your Express VIs to the Write to Spreadsheet file.vi and it will work howver this is not a good programming practice.
Usually if you are acquiring data in a while loop and writing it to file, you want to open the file before the beginning of the loop, write to the file in the loop (using Write File.VI), and close the file after the loop finishes executiong. This approach prevents opening and closing the file every time the loop runs (which is what happens when you use a high level file Vi like Write to Spreadsheet File inside the loop).
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Save waveform data with corresponding time array to spreadsheet file

Hello to all
I am looking for a possibility to save voltage data acquired and displayed continousely to a spreadsheet file. Acquiring and displaying is not a big problem, but I have troubble to save the data with the corresponding timestamp with more than seconds accuracy. I am acquiring the data at 1000 Hz and read packages of 500 samples. The recording time should not be limited, it will be started and stopped manually. In fact the acquired voltage data first has to be scaled and than saved. If I use the 'WRITE WAVEFORM TO SPREADSHEET' VI the time column is in seconds' accuracy and that is not what I need. If I create my own time array from the waveform parameters I have timing problems. The accuracy in time should reflect the sample rate. I will attach one of my not very successful trials for better understanding.
please help a newcomer!
Thanks in advance
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Attachments:
display & record forces v.1.0.vi ‏181 KB

I usually follow a simple method to generate time stamp
I keep sampling rate and number of samples to read as equal and do as shown in the attached VI
I also remember building a VI with a small modification to this time stamp generation logic to cater to acq, where number of samples to read is half/one fourth/one tenth of sampling rate specified, but cannot find that VI.
Hope this helps
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Acq_DAQmx_filesave_time stamp.vi ‏121 KB

HELP!!! I am trying to save data in a spreadsheet

I have tried several things but can not get this, should be pretty simple.
1) I have a loop which sends command and read serail buffer and parse data. This works fine and my program is 3 seconds behind my actual device. Now I want to save the data I parse out in a spreadsheet but only every minute becasue my program will be running for 8 hours. Do you guys think that Excel would be handel such a big matrix.
my data is something like this:
I am receiving the day of the year which is 338 as string. the time which is also a string but updates as my loop is running which is approximately 3 seconds behind my actuall hardware shows but thats not a problem because I acutally want to save the data rather than viewing purpos
e.
2) If some one can show me a approach where user is asked to save-as file option (where to save the file) when I am start my loop when I am actually sending command and receving data and parsing data and if the file exist already then name another file.
3) the format I want to put my data to spreadsheet is as:
day-time (actual number)
01 70
02 80
03 90
04 76
so on untill i read 36 channels and their corresponding temperatues. Next time i append the next data set after a minutes should look like:
day-time day-time
01 70 01 72
02 80 02 81
03 90 03 95
04 76 04 78
36 90 36 98
this would be a pretty big metrix if i append data every minute and my program would run for 8 hours.
As I mentioned I want to save the data only every minutes while my program acquiring data every 3 seconds. Thanks for your help

Hi,
My name is Michel Carrière, from montreal.
I save directly to excel large amounts of data all the time. My first solution is a VI called "SAVE TO EXCEL". With this subroutine, you can open excel dump data and save your file.
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SAVE_TO_EXCEL.zip ‏53 KB
WattmetreHP_1CHAN_V2.vi ‏298 KB

How to acquire data properly in a b-scan

I'm aqcuiring ultrasound backscattered data in a b-scan system. The vi that i have designed for this purpose is based on a niscope vi (sample rate aquisition). Every time an iteration occurs i get 1000 points and record them in a .xls file, appending values to this file on every iteration, until the transducer gets to the end of 1 line. when the transducer gets to the end, it moves one step, the vi creates another file, where the following acquisitions will be recorded til the next step. My problem is: the transducer is excited at a 1khz rate, (and every time this happens i get 1000 points), but the program (the vi) does not run fast enough to keep track of every pulse (the iteration should occur at 1khz rate also, what's impossi
ble, at least i think it is). Since i'm stuck for a while with this ang i always got very good sugestion on this forum (thanks pals!) i decided to ask for some help. I want to know if it's possible to make this kind of acquisition using labview only and how it can be done.

Unless you are using a very old machine, you should easily be able to store your data at a 1MHz rate. A three year old 650MHz Pentium III is capable of streaming to disk at 10MHz+, so 1MHz is absolutely no problem. You only have a few changes to make.
1) Do not use the .xls format. This is a non-native LabVIEW format and takes translation time. It is unclear from you question whether you are using ActiveX and storing in native Excel format or are using the LabVIEW VIs to store data in text based spreadsheet format (very slow). In either case, you will be much better off saving as a simple binary file. Use the Write File primitive. You can reach disk limited speeds this way. Store to disk in 65,000 byte chunks for maximum speed. If you need the data in a spreadsheet format, convert it after you are done. If you use a simple binary format, most analysis programs (e.g. MathCAD, Mathematica) can read it.
2) Consider using one file instead of many. Alternately, create all your files before you start. Creating files is a slow process. You do not want to do it while taking data. If you have a newer version of NI-Scope, look on your CD for a directory called sfpFile. It contains some LabVIEW VIs to create binary files with structure. They are somewhat difficult to use, but are tailor made for your application. They allow you to store multiple waveforms in a single binary file with relatively easy access.
3) Your data acquisition needs are not really clear. It appears you are taking 1000 data points every millisecond. What hardware are you using to acquire the data and what scan rate are the points taken at? What is the dead time between each 1000 point scan (if any)? If you are taking data at 1MHz, you are probably better off streaming continuously instead of taking data in separate records, if your hardware supports it. If you are taking data at 100MHz, your dead time is almost a millisecond, so you do not need to stream. Consider putting your save code in a separate loop from your acquisition code. This allows LabVIEW to multithread your application (works much better in LV7.0), resulting in better performance. Use LV queues to communicate between the loops. Use local variables to pass the data between the loops.
Finally, run the LabVIEW profiler to find out where your slow steps really are (in the Tools->Advanced->Profile VIs... menu). If these suggestions don't help or are not detailed enough, post more details of you data acquisition and we'll try again. You should be able to do this.
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OSB: Cannot acquire data source error while using JCA DBAdapter in OSB

Hi All,
I've entered 'Cannot acquire data source' error while using JCA DBAdapter in OSB.
Error infor are as follows:
The invocation resulted in an error: Invoke JCA outbound service failed with application error, exception: com.bea.wli.sb.transports.jca.JCATransportException: oracle.tip.adapter.sa.api.JCABindingException: oracle.tip.adapter.sa.impl.fw.ext.org.collaxa.thirdparty.apache.wsif.WSIFException: servicebus:/WSDL/DBAdapter1/RetrievePersonService [ RetrievePersonService_ptt::RetrievePersonServiceSelect(RetrievePersonServiceSelect_inputParameters,PersonTCollection) ] - WSIF JCA Execute of operation 'RetrievePersonServiceSelect' failed due to: Could not create/access the TopLink Session.
This session is used to connect to the datastore.
Caused by Exception [EclipseLink-7060] (Eclipse Persistence Services - 2.0.2.v20100323-r6872): org.eclipse.persistence.exceptions.ValidationException
Exception Description: Cannot acquire data source [jdbc/soademoDatabase].
Internal Exception: javax.naming.NameNotFoundException: Unable to resolve 'jdbc.soademoDatabase'. Resolved 'jdbc'; remaining name 'soademoDatabase'.
; nested exception is:
BINDING.JCA-11622
Could not create/access the TopLink Session.
This session is used to connect to the datastore.
JNDI Name for the Database pool: eis/DB/soademoDatabase
JNDI Name for the Data source: jdbc/soademoDatabase
I created a basic DBAdapter in JDeveloper, got the xsd file, wsdl file, .jca file and the topLink mapping file imported them into OSB project.
Then I used the .jca file to generate a business service, and tested, then the error occurs as described above.
Login info in RetrievePersonService-or-mappings.xml
<login xsi:type="database-login">
<platform-class>org.eclipse.persistence.platform.database.oracle.Oracle9Platform</platform-class>
<user-name></user-name>
<connection-url></connection-url>
</login>
jca file content are as follows:
<adapter-config name="RetrievePersonService" adapter="Database Adapter" wsdlLocation="RetrievePersonService.wsdl" xmlns="http://platform.integration.oracle/blocks/adapter/fw/metadata">
<connection-factory location="eis/DB/soademoDatabase" UIConnectionName="Connection1" adapterRef=""/>
<endpoint-interaction portType="RetrievePersonService_ptt" operation="RetrievePersonServiceSelect">
<interaction-spec className="oracle.tip.adapter.db.DBReadInteractionSpec">
<property name="DescriptorName" value="RetrievePersonService.PersonT"/>
<property name="QueryName" value="RetrievePersonServiceSelect"/>
<property name="MappingsMetaDataURL" value="RetrievePersonService-or-mappings.xml"/>
<property name="ReturnSingleResultSet" value="false"/>
<property name="GetActiveUnitOfWork" value="false"/>
</interaction-spec>
</endpoint-interaction>
</adapter-config>
RetrievePersonService_db.wsdl are as follows:
<?xml version="1.0" encoding="UTF-8"?>
<WL5G3N0:definitions name="RetrievePersonService-concrete" targetNamespace="http://xmlns.oracle.com/pcbpel/adapter/db/KnowledeMgmtSOAApplication/AdapterJDevProject/RetrievePersonService" xmlns:WL5G3N0="http://schemas.xmlsoap.org/wsdl/" xmlns:WL5G3N1="http://xmlns.oracle.com/pcbpel/adapter/db/KnowledeMgmtSOAApplication/AdapterJDevProject/RetrievePersonService" xmlns:WL5G3N2="http://schemas.xmlsoap.org/wsdl/soap/">
<WL5G3N0:import location="RetrievePersonService.wsdl" namespace="http://xmlns.oracle.com/pcbpel/adapter/db/KnowledeMgmtSOAApplication/AdapterJDevProject/RetrievePersonService"/>
<WL5G3N0:binding name="RetrievePersonService_ptt-binding" type="WL5G3N1:RetrievePersonService_ptt">
<WL5G3N2:binding style="document" transport="http://www.bea.com/transport/2007/05/jca"/>
<WL5G3N0:operation name="RetrievePersonServiceSelect">
<WL5G3N2:operation soapAction="RetrievePersonServiceSelect"/>
<WL5G3N0:input>
<WL5G3N2:body use="literal"/>
</WL5G3N0:input>
<WL5G3N0:output>
<WL5G3N2:body use="literal"/>
</WL5G3N0:output>
</WL5G3N0:operation>
</WL5G3N0:binding>
<WL5G3N0:service name="RetrievePersonService_ptt-bindingQSService">
<WL5G3N0:port binding="WL5G3N1:RetrievePersonService_ptt-binding" name="RetrievePersonService_ptt-bindingQSPort">
<WL5G3N2:address location="jca://eis/DB/soademoDatabase"/>
</WL5G3N0:port>
</WL5G3N0:service>
</WL5G3N0:definitions>
Any suggestion is appricated .
Thanks in advance!
Edited by: user11262117 on Jan 26, 2011 5:28 PM

Hi Anuj,
Thanks for your reply!
I found that the data source is registered on server soa_server1 as follows:
Binding Name: jdbc.soademoDatabase
Class: weblogic.jdbc.common.internal.RmiDataSource_1033_WLStub
Hash Code: 80328036
toString Results: ClusterableRemoteRef(8348400613458600489S:10.2.1.143:[8001,8001,-1,-1,-1,-1,-1]:base_domain:soa_server1 [8348400613458600489S:10.2.1.143:[8001,8001,-1,-1,-1,-1,-1]:base_domain:soa_server1/291])/291
Binding Name: jdbc.SOADataSource
Class: weblogic.jdbc.common.internal.RmiDataSource_1033_WLStub
Hash Code: 92966755
toString Results: ClusterableRemoteRef(8348400613458600489S:10.2.1.143:[8001,8001,-1,-1,-1,-1,-1]:base_domain:soa_server1 [8348400613458600489S:10.2.1.143:[8001,8001,-1,-1,-1,-1,-1]:base_domain:soa_server1/285])/285
I don't know how to determine which server the DBAdapter is targetted to.
But I found the following information:
Under Deoloyment->DBAdapter->Monitoring->Outbound Connection Pools
Outbound Connection Pool Server State Current Connections Created Connections
eis/DB/SOADemo AdminServer Running 1 1
eis/DB/SOADemo soa_server1 Running 1 1
eis/DB/soademoDatabase AdminServer Running 1 1
eis/DB/soademoDatabase soa_server1 Running 1 1
The DbAdapter is related to the following files:
C:\ Oracle\ Middleware\ home_11gR1\ Oracle_SOA1\ soa\ connectors\ DbAdapter. rar
C:\ Oracle\ Middleware\ home_11gR1\ Oracle_SOA1\ soa\ DBPlan\ Plan. xml
I unzipped DbAdapter.rar, opened weblogic-ra.xml and found that there's only one data source is registered:
<?xml version="1.0"?>
<weblogic-connector xmlns="http://www.bea.com/ns/weblogic/90">
<enable-global-access-to-classes>true</enable-global-access-to-classes>
<outbound-resource-adapter>
<default-connection-properties>
<pool-params>
<initial-capacity>1</initial-capacity>
<max-capacity>1000</max-capacity>
</pool-params>
<properties>
<property>
<name>usesNativeSequencing</name>
<value>true</value>
</property>
<property>
<name>sequencePreallocationSize</name>
<value>50</value>
</property>
<property>
<name>defaultNChar</name>
<value>false</value>
</property>
<property>
<name>usesBatchWriting</name>
<value>true</value>
</property>
<property>
<name>usesSkipLocking</name>
<value>true</value>
</property>
</properties>
          </default-connection-properties>
<connection-definition-group>
<connection-factory-interface>javax.resource.cci.ConnectionFactory</connection-factory-interface>
<connection-instance>
<jndi-name>eis/DB/SOADemo</jndi-name>
          <connection-properties>
               <properties>
               <property>
               <name>xADataSourceName</name>
               <value>jdbc/SOADataSource</value>
               </property>
               <property>
               <name>dataSourceName</name>
               <value></value>
               </property>
               <property>
               <name>platformClassName</name>
               <value>org.eclipse.persistence.platform.database.Oracle10Platform</value>
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</connection-instance>
</connection-definition-group>
</outbound-resource-adapter>
</weblogic-connector>
Then I decided to use eis/DB/SOADemo for testing.
For JDeveloper project, after I deployed to weblogic server, it works fine.
But for OSB project referencing wsdl, jca and mapping file from JDeveloper project, still got the same error as follows:
BEA-380001: Invoke JCA outbound service failed with application error, exception:
com.bea.wli.sb.transports.jca.JCATransportException: oracle.tip.adapter.sa.api.JCABindingException: oracle.tip.adapter.sa.impl.fw.ext.org.collaxa.thirdparty.apache.wsif.WSIFException: servicebus:/WSDL/DBAdapterTest/DBReader [ DBReader_ptt::DBReaderSelect(DBReaderSelect_inputParameters,PersonTCollection) ] - WSIF JCA Execute of operation 'DBReaderSelect' failed due to: Could not create/access the TopLink Session.
This session is used to connect to the datastore.
Caused by Exception [EclipseLink-7060] (Eclipse Persistence Services - 2.0.2.v20100323-r6872): org.eclipse.persistence.exceptions.ValidationException
Exception Description: Cannot acquire data source [jdbc/SOADataSource].
Internal Exception: javax.naming.NameNotFoundException: Unable to resolve 'jdbc.SOADataSource'. Resolved 'jdbc'; remaining name 'SOADataSource'.
; nested exception is:
BINDING.JCA-11622
Could not create/access the TopLink Session.
This session is used to connect to the datastore.
Caused by Exception [EclipseLink-7060] (Eclipse Persistence Services - 2.0.2.v20100323-r6872): org.eclipse.persistence.exceptions.ValidationException
Exception Description: Cannot acquire data source [jdbc/SOADataSource].
Internal Exception: javax.naming.NameNotFoundException: Unable to resolve 'jdbc.SOADataSource'. Resolved 'jdbc'; remaining name 'SOADataSource'.
You may need to configure the connection settings in the deployment descriptor (i.e. DbAdapter.rar#META-INF/weblogic-ra.xml) and restart the server. This exception is considered not retriable, likely due to a modelling mistake.
It almost drive me crazy!!:-(
What's the purpose of 'weblogic-ra.xml' under the folder of 'C:\Oracle\Middleware\home_11gR1\Oracle_OSB1\lib\external\adapters\META-INF'?
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Write to spreadsheet file.vi is storing data in one row only.

The 8 points of data is going into one column in the spreadsheet. In the "Write to spreadsheet file string.vi" how do I write the 8 points to one row for each cycle?
I got this VI from NI's web a couple of years ago and forgot how to modify this part. I usume it is within the write file.vi.
Thank you in advance
Skip

I just reread your original post and the way the "Write to Spreadsheet File.vi" that ships with LV works by default is to put 1D arrays into rows. I read your post backwards and told you how to put the data in a column. Sorry.
In any case, perhaps you need to make sure the Transpose input ISN'T true, and that the delimiter IS a tab.
Mike...
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Organizing a multiplexer acquired data in a spreadsheet file of a column major order

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