Digiducer and Raspberry Pi Wireless Compatibility
How can vibration acquisition be made simpler? Wireless compatibility.
The Digiducer already makes vibration acquisition portable and stress-free. Wireless compatibility with the Raspberry Pi allows recording and analyzing to be much simpler and less time consuming. With the Raspberry Pi-Digiducer ensemble, one does not even need to leave the office to use the accelerometer. All that is needed is a Raspberry Pi, a Wi-Fi card and an external battery pack. For less than an additional $100, vibration acquisition can become wireless.
Through the use of PuTTY, the Raspberry Pi was accessible from a computer via Wi-Fi. PuTTY is an SSH (a network protocol to reach remote machines) client used on the Windows® Platform and requires IP cooperation between the host and the Raspberry Pi.
After successfully remoting into the Raspberry Pi, the graphical user interface was made available by Ultra VNC Viewer. There are other VNC (Virtual Network Computing) programs that are compatible with the Raspberry Pi. VNCs provide a nice and simple way to allow the user to access their device’s graphical user interface (GUI) and avoids using the Linux command line.
Now that the Raspberry Pi’s GUI could be accessed wirelessly, it is time to do some vibration analysis. Audacity, a recording interface and analyzer, makes recording and analyzing vibration data effortless. There are many more Linux-based spectrum analyzers that can be found online.
The Digiducer was placed on a gear box and the data was gathered wirelessly. This real-life application gave the results shown in the Audacity spectrum plot. The 24-bit, high dynamic range, and accurately calibrated sensor produced solid vibration results.
Digiducer and Raspberry Pi 2 on a gear box
|Consult your local IT team or network administration to help set up IP configurations and the Wi-Fi interface.|
After recording and analyzing, the data can also be sent to the host computer through file transfer software, such as WinSCP. Post-processing vibration data on the host computer is simple with programs like MATLAB or SpectraPLUS. Read about MATLAB’s compatibility with Digiducer here.
Another feature of the Raspberry Pi-Digiducer ensemble is the ability to create custom applications. PortAudio, an open-source audio library, can be manipulated to grab and analyze data on the main computer without using any VNC or file transfer software. To perform analysis on the host computer, Optimized software for the Digiducer can be found here.
The Raspberry Pi’s wireless compatibility makes vibration analysis even easier for the already portable Digiducer. The low cost, quick installation and straightforward analysis creates a simplified testing situation.