Hey. I am using cDaq and NI 9237 (Bridge module). Where I am measuring strain and performing Frequency analysis on it (FFT). This is known as dynamic stress analysis if I am not mistaken. The issue I am facing is that there is a peak 0 Hz which is relatively large as compared to the peaks at other frequencies. I am using a quarter bridge configuration and the gauge is 350ohm.
How can I get rid of this peak. I have tried a high-pass filter blocking frequencies lower than 3Hz. I have used the butter-worth filter with a order of 35. but this only dampens the the amplitude for that peak and it shifts it to 6 7 HZ.
Another point is that when the filter is applied the 0Hz peak is shifted as mentioned and it's amplitude increases and decreases.
Some feedback will be highly appreciated.
