Would like to store data in file for timing purposes
I have written this code in labview and is working like it should. It takes data of two transducers (analog signals) mounted 1.5 m apart.
The goal is to find out a precise time between the two rising edges. (attached pic)
I have collected two waveforms, one from
transducer 1 and one from transducer 2. Element 0 of the waveform
array is the data from transducer 1. Element 1 is the data from
transducer 2.
Both waveforms contain timing information as
part of their datatype.
I have tried to store the data as a txt file, but it only stores the last result of each transducer.
I would like to store the data, and process it in matlab to find a precise time between the rising edges or can this be done in the same VI I have created?
Any help is appreciated.
Attachments:
FinalShockSpeed.vi 32 KB
Picture1.jpg 25 KB
Use the "Write to measurement file.vi" and "Read from wavefrom file.vi "found in the "Programming->Waveform->Waveform file I/O pallete" for saving and retrieving the acquired data.
note that the file hence created will not be in the human readable form.
The precise rising time computation can also be done using labVIEW. Apply the same logic that you have done in matlab to create a subvi in LabVIEW\
Guru
Regards
Guru (CLA)
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Attachments:
Image12.png 24 KBHI,
In attachment file you will find the data before the saving operation in data file.
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Attachments:
AFTER.txt 1 KB
before.txt 1 KB -
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I am very new to LabView, so I need some help to come up with an idea that can help me save data continuously in real time. Also I don't want the file to be too big, so I would like to crete a new file in every 32 mega bytes, and clear the previous buffer. Now I have this code can save voltage data to TDMS file, and the sample rate is 2m Hz, so the volume of data increase very fast, and my computer only have 2G ram, so the computer will freeze after 10 seconds I start to collect data. I need some advise from you briliant people.
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> using dots instead of commas. Is there a way of converting this in
> labVIEW, or how can I get the program to enterpret the figures in the
> correct way?
>
> The program doest enterpret my figures from the text file in the
> correct way since the numbers contain dots instea
d of commas. Is there
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