Release of OASIS-ERIS - A new version of the Open Acquisition System for IEPE Sensors (OASIS)!

We are thrilled to announce the release of OASIS-ERIS - the Open Acquisition System for IEPE Sensors - Electrically Refined and Inter-device Synchronization! It is based on the Analog Devices AD7606C-18 analog-to-digital converter, offering 18-bit resolution on eight simultaneously sampled channels, and the Espressif ESP32-S3 microcontroller. The laboratory usability of OASIS-ERIS is significantly improved compared to OASIS-UROS due to the added inter-device synchronization. By physically connecting the sample clocks across devices, a truly synchronized data acquisition can be achieved with an arbitrary number of acquisition boards. Additionally, a migration of the firmware to ESP-IDF allows a major increase of the achievable sampling frequency to 100 kHz. This paper documents the hardware and software stack of OASIS-ERIS, and provides all materials necessary for reproduction. Further, the performance of OASIS-ERIS is tested against a commercial measurement system in an Experimental Modal Analysis campaign. The results show that OASIS-ERIS closely matches the performance of the commercial system, making it a viable replacement for academia and projects with tightly constrained budgets.

The corresponding paper documents the hardware and software of OASIS-ERIS and provides all materials required to reproduce the open acquisition system. You can find all the details in the preprint avilable here: https://www.researchgate.net/publication/410842616_OASIS-ERIS_Open_Acquisition_System_for_IEPE_Sensors_-_Electrically_Refined_and_Inter-device_Synchronization