I still have just a straight line. Its like my MEMS gets no data, but i made a test in the DAQmx and the hardware works fine. I added some screenshots. You have any idea?
The error message is also strange because i setted everywhere the same rate(1kHz) and samples(100) like ago. Or did i missed it somewhere?
Thank you very much!
Alex... i think i know why.. is it because i have changed the DAQ card? last week i used the SCB 68a with a PCI card. Now its a USB 6001 from NI
Thank you very much for your help and your patience! It works Some last questions:
For understanding: 1. why makes the FFT in the first milliseconds always this one big peak?
2. the amplitude in the FFT is in Herz?
For the program:
3. could it also be possible to vary the waveform graph 2 and 3 from 10 seconds manualy into 15 or 20 seconds? e.g. through a rotary knob?
1. This could be the dc part in your signal.
thank you it´s also a nice feature, it´s great thou, but i would like to scale the x-axis and maybe y-axis by a rotary knob.
Furthermore i tried to write the data from the "waveform 2" & "waveform fft2" into a excel chart to print and compare them. Attached my VI with Express tools does´nt work as expected :/
With this way you can set also the minimum and the maximum for each axis.
There is also a method export grap to excel
Save to a series of files and use the true to generate a new one.
the scale with the x and y axis doesnt work, just the description changes the graph stays constant. :/
An "extra" idea for my VI is to create sth like a RMS - all three voltage signals (x-y-z-axis from the analog sensor) could combine together and could be visual in an extra waveform. would be usefull that i dont have to switch between the 3 signals of the sensor and compare everyone after each measurement.
attached the VI