Real time data acquisition of piezoelectric pressure sensor from myDAQ

[Abanah]

I am newbie to LabView. I am working on piezoelectric pressure sensor from which I need to calculate Time vs Voltage when pressure is being applied. The open-circuit voltage of my sensor in multimeter shows reading of 60mV.  I connected my sensor to myDAQ and acquired the voltage signal on waveform chart. It shows voltage from -10 to  +10V (the voltage range kept in myDAQ properties). Attached the connection diagram and DAQ properties that I kept in Labview. How to view the accurate voltage that is coming from my sensor in Labview. What are the modifications that I have to do to my connection diagram.

[Henrik_Volkers]

one hint to your piezo sensor:

typically the output of such sensors is a force/pressure propotional charge.

Together with the capacity of the senor and cable and input this results in a voltage which depends also from your setup.

the common way to avoid the cable influence is to read such sensors is  charge amplifier ..

[Abanah]

So can I connect my piezo sensor output to charge amplifier and then to the DAQ system. 

[Henrik_Volkers]

---

@Abanah wrote:

So can I connect my piezo sensor output to charge amplifier and then to the DAQ system. 

---

that's how it is usually done 🙂

what model of sensor and CA do you use?

[Abanah]

I made a flexible pressure sensor for which I need to analyse time vs. voltage. I have to design a charge amplifier using amplifier IC, resistors and capacitors. Can you suggest some simple charge amplifier circuit that can amplify 0-200 mV. What should be the output voltage so that the DAQ can read it..