Plotting of output of IEPE sensor

[Subhadip Chakraborty]

We are able to obtain data from MCC 128 and MCC 172 simultaneously. However we are unable to the following:

1. Obtain/ Plot the output of MCC 172 when it is connected to a IEPE accelerometer  of make PCB having model no. 353B31 whose sensitivity is 5.1 mv/m/s2 i.e 50 mv/g

2. Is it possible to plot the output of either board i.e MCC 128 and MCC 172 in same/different window ?

[Fausto]

Hello @Subhadip Chakraborty.

Both data logger and web server examples for the MCC 172, which are included with the MCC DAQ HAT software installation, allows a user to enable IEPE and enter a sensor's sensitivity.  As shown below, the data logger example plots the time domain data and FFT data separately.  A user can custom their application to plot data from a MCC 128 DAQ HAT.

 

 

 

Regards,

Fausto

[Subhadip Chakraborty]

Thank you for your reply. We are able to display the output of MCC 172 in the webserver.

1. However kindly let us know , whether the output of 128 and 172 can be simultaneously displayed in the same or different windows in time domain. (We are able to acquire data simultaneously).

2. Can we download the webserver package in our Raspberry pie and use it without the connection to internet? Whether we can plot the FFT simultaneously for MCC 128 and MCC 172 in the same or different windows in frequency domain.

[Fausto]

Hello @Subhadip Chakraborty.

The MCC DAQ HAT's web_server.py example was created to display captured data of selected channels from one MCC DAQ HAT board only, in a web browser.  It is up to the user to alter our examples or write their own application to suit their needs.  If you are looking for a local graphical application example, please consider the data logger (C/C++) example.

Are you using the RPi 40-pin header's pin 35 (GPIO19), which has the MCC 172's clock bus, and connecting it over to the Clock (CLK) terminal on the MCC 128 board?

Are both DAQ HATs set to the same sampling rate?

If the MCC 128 data is in a separate buffer than the MCC 172 data, then use different windows to display the time domain and frequency domain data.

 

Regards,

Fausto