Trigger, accelerometers

[Rama2141]

Hello! I am new to LABVIEW and its functions. I have a set of accelerometers, and NI DAQ, NI PXIe 1073 hardware & software. I want to start recording the signal with accelerometers only when I give some impact source with a hammer at some distance near the sensor. How can I set this? Similar applications are in triggered hammers, where the signal is recorded as soon as the hammer is hit. Kindly help. Please ignore my lack of knowledge with instrumentation things.

Thank you.

[GerdW]

Hi Rama,

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@Rama2141 wrote:

Hello! I am new to LABVIEW and its functions. I have a set of accelerometers, and NI DAQ, NI PXIe 1073 hardware & software.

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Then you should start to get familiar with LabVIEW in general and DAQmx for your hardware!

There are Training resources offered at the top of the LabVIEW board. LabVIEW also comes with a huge library of example VIs and projects…

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@Rama2141 wrote:

I want to start recording the signal with accelerometers only when I give some impact source with a hammer at some distance near the sensor. How can I set this? Similar applications are in triggered hammers, where the signal is recorded as soon as the hammer is hit.

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Most probably you want to start the recording for a short moment before the hammer hits your DUT!

DAQmx allows for such measurements by using a trigger signal and setting a pre-trigger conditions for the accelerometer signals.

Again: learn about LabVIEW, then learn about DAQmx, then learn from the example VIs coming with LabVIEW.

After finishing all this you can setup your own measurement system using your hardware…

(By "learn DAQmx" I don't talk about those sales-pitch ExpressVIs like DAQAssistent. Please learn DAQmx using "real" functions!)

[Henrik_Volkers]

If you can use the sound and vibration toolkit, look into the shipped examples .... (Help/Find examples ..)

Oh, and while learning LabVIEW that's an good idea too 😉

[Bob_Schor]

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(By "learn DAQmx" I don't talk about those sales-pitch ExpressVIs like DAQAssistent. Please learn DAQmx using "real" functions!)

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NI has a series of White Papers and Tutorials on DAQmx.  My favorite (which really made DAQmx clear to me) was "Learn 10 Functions in NI-DAQmx and Handle 80% of Your Data Acquisition Applications" (or a title very close to this -- start typing this in a Web Search and you'll find the article).  Ignore the section on the Dreaded DAQ Assistant, and read the rest to learn how powerful, yet simple, DAQmx can be.

Bob Schor

[dsb@NI]

Sound and Vibration Toolkit includes an Impact Test sample project: