Sonardyne has integrated a Sequoia LISST-200X particle size analyser into an Origin 600 ADCP. The LISST-200X measures the size distribution of particles suspended in water and can be used in subsea sediment, dredging, aquaculture, and environmental applications.
The LISST-200X can stream data directly into the Origin 600 external sensor port, or it can be connected via the Origin E-Mux multiplexor, which can receive measurements from up to four sensors and pass their data to the ADCP. The Origin E-Mux also provides additional power to the ADCP and any external sensors, allowing for extended deployments. All sensor data is logged on Origin 600 for download post-deployment, but can also be fused with ADCP measurements within the Sonardyne Edge computing environment. Fused data can then be transmitted to the surface via Origin 600’s integrated acoustic modem.
This integration provided a good example of the above process: The LISST-200X was preconfigured to produce measurements at a fixed rate using supplied Sequoia software. It was then cabled to Origin, which powered the sensor and logged the received data. The data was fused with ADCP current measurements in Origin’s Edge computing environment, allowing in-situ combination of multiple parameters into a NMEA-style string. This string was transmitted acoustically to the surface every five minutes using Origin’s integrated acoustic modem. The NMEA data was then further distributed to a Cloud account, allowing users to view live updates of current speed, current bearing and mean particle size and variance.
In coordination with Planet Ocean (local Sequoia Distributor for the UK & Ireland) a local LISST-200X Owner and Power-User “Partrac” offered their instrument to be successfully implemented for the purpose of this work.