Human Body Vibration Analyzer v1
Description
Developed for a client, a human body vibration analyzer is an equipment that uses a 3-axis accelerometer to measure vibration intensity on workers for work safety purposes. This product has two channels, meaning that proccesses data from two 3-axis accelerometers simultaniously.
Technical Details
The main PCB is powered by a Colibri iMX7 System-on-Module (SoM) from Toradex, which runs a custom built Linux image. The SoM is connected to a custom carrier board that has a 3.2-inch LCD display, responsible for showing an embedded Qt GUI that allows users to configure measurements, view recorded data and manage equipment settings.
The board is battery powered, charges via USB, and stores data on a microSD card. It also has a STM32 co-processor that collects high speed accelerometer data stream via SPI interface and processes it using digital filters based on international standards (e.g., ISO, IEC). The collected data is sent to the SoM via UART with a custom data protocol.
I was responsible for developing:
- The Qt application in C++ using Qt Creator and Qt Widgets
- Data reception and processing on the SoM via UART on Linux /dev/tty
- Passing data from the main application to the co-processor through Linux pipes
- Battery fuel gauge and charger control via I²C (Texas Instruments ICs)
- Flash data storage driver on Linux
Results
You can check it out on the client's website, a leading Brazilian measuring equipment vendor.
