A problem of measuring extremely weak vibration signals with accelerometers

[Ceceliaanne]

I used the accelerometer sensor of the PCB, and cooperated with the NI 4461 acquisition card to perform a vibration signal of an insect, and obtained such a signal. It stands to reason that the sensitivity of this sensor is very high. But even if I tap the tabletop that touches the sensor with my hand. The change in this waveform on the graph is also not obvious. Where is the problem? PS: Because my computer does not have a PCI slot, I bought a CPI-E to CPI interface, and then used an extension cable to connect the capture card to the computer. Does it matter?

[Guru_Prasad]

Hello @Ceceliaanne 

This forum can be used for Infineon products. Please contact your product supplier 

Thanks

Guru