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How do I start and stop a measurement automatically?
Hi, I have a a couple of simple programs to capture signals from two piezo sensors. One is an accelerometer, the other is a force transducer. I would like to be able to control the start of the capture...
View ArticlePlanet Orbits
Hello, I am new to this, so if this has already been posted, I apologise. I was wondering if it would be possible to plot the orbits of the plants around the sun in LabVIEW using equation of motion. I...
View ArticleDifferent data types in table
Hello there,i have problem with creating a table, which contains different data types(particularly string, intiger , boolean)I will be greatful, if someone give me some advise how to solve this...
View Articlenetwork shared variable vs RT fifo enabled
Good morning. I have an application for using a "notifier" for changing state on a real-time system. I am thinking of using a shared variable to accomplish this (I could use a network stream, but I...
View ArticleWhy should Shared Variables be serialized?
The Best Practices (Real-Time) Help for Shared Variables in LabVIEW (2012) says "Improve performance and prevent race conditions by executing shared variable accessors serially", and then gives some...
View ArticleTrouble mixing DAQmx Events and User Events
LV2013 I've never used DAQmx Events before, and I'm having trouble using an EVENT structure that can accept both regular USER events, and DAQmx Events. How do you get them all registered? See this...
View ArticleExcessive Run-Time Delay
Folks, I need help to troubleshoot the excessive run delay with my application. Here is a description of what is going on. 1. I have an Analog Input voltage task consisting of 16 channels. 2. I have...
View ArticleAcquire and Displaying Video from D-Link DCS-930L
Hello! I want to know about acquiring video from the camera as I have mentioned in the topic, but I don,t have much experience about IMAQ related apps.The idea behind the whole concept is to display a...
View ArticleMulti Channel Data Acquisition using PXI-6143
Hi all I can acquire one channel data and am trying multi channel data acquisition using PXI-6143.And I made attached code.But in this code, the signal in ch1 is acquired and in ch2 is not acquired....
View Articlehow to select a region for analysis from a very big image
Hello everybody, The imgaes recorded are very big, with 1288*964 in scale. The regions I am interested is only a strip (say, (0, 400), (1288, 420) ) in the middle of the images. I need to anaylze the...
View ArticleMeasure amplitude continuously
Hi,I am acquiring a sine wave, square, triangle wave with different frequencies and amplitudes directly into labview showing the result in a waveform chart continuously. The thing is that i Want to...
View ArticleHow can I find the local maximum in each interval from a graph?
I have very less experience in labview and need some helps. I am currently using Labview 2013. I am analysing a very big data file. I want to find the values of the local maximum (the peak) in every...
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Code about getting clipboard formats.
Hello everyone, I have this subVI that I found somewhere in this forum.When you've found the BMP format, you pass the index of that element for the next subVI. But why do I need the ANSI text to be...
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Blood pressure data acquisition
Hello,I have some problems with blood pressure measuring.I have Blood Pressure Sensor connected to the SensorDAQ interface. I can see installed SensorDAQ in NI MAX, but i really dont know how to get...
View ArticleRing typedef in struct to DLL 32 64 bit bug?
Labview 2011, with all the service packs. The observed behaviour: when making a ring typedef in a struct, int32, and passing to DLL, the behaviour is as expected at32 bit version of Labview.When the...
View Articledisable property node problem
Hello everyone!I want to make a VI that the user won't fool around with the button.So I put in my event case "value change",a disable property node for 1sec (disable) and out of it,an enable.The...
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Copy content clipboard source to destination
Hello everyone, I am examining code that I found here somewhere on the forum. The code copies the content of the clipboard, which is in BMP, to convert it in usable image data. When I look in depth at...
View ArticleOne data sample written to txt file
I have a program that is monitoring 12 digital input (DI) levels. A case structure inside a for loop indicates what level (high/low) the 12 DIs should be at. IF any of the 12 input levels are not...
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configure icon missing from tdm excel importer add-in
I have downloaded and installed TDM Excel Add-In for Microsoft Excel Version 3.5.1 from this link http://www.ni.com/example/27944/en/The user guide http://www.ni.com/white-paper/4906/en/ says "...click...
View ArticleCall asynchronously, then close. Can't reopen
Hey guys, I have a problem where I call asynchronouly a VI (graph_sync.vi), when I close it using the X upper right button, I cannot open (or call, perhaps) it again. Close using the 'Close' button in...
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