Apresentação de Poster em conferência Nacional.Presentation of a wave profile and tide monitoring system, with low-cost and low-power pressure sensors connected to a datalogger in a wired or acustic network

Faria, C.L.

Gomes, P. A.

Gonçalves, L. M.

Martins, Marcos Silva

Matos, Tiago

Penso, Camila Maria Ramos Aires Moreira

Rocha, J.L.

English

Rocha, J. L.

Faria, C. L.

Universidade do Minho: RepositoriUM

Wave Profile and Tide Monitoring System for Scalable ImplementationWhy sea and river monitoring is so importantThe climate is changing-Growing human activity;-Rising sea levels;-Worsening weather conditions.What needs to be done-Efficient management of resources;-Mitigate impact on ecosystems;-Anticipate with precision where to act ahead.There is a need for-Abundant reliable data;-Real-time monitorization;-Wide area surveillance and study.There’s more sea than land in Portugal-The Portuguese sea makes up 18 times its land area;-Has the third largest Exclusive Economic Zone in the European Union;-Rich in resources and plenty in opportunities;Pressure sensor-MS5837-30BA pressure sensor;-Range of 0 bar to 30 bar;-0.2 mbar resolution;-Low-power;-Allows water height measurement with 0,2 cm resolution;µController-STM32 low-power microcontroller;-High timing precision;-Versatile for a wide range of application;-Can integrate different sensors.Monitoring System-Pressure sensors connected in a network;-Datalogger for centralized data storage and real-time broadcast;-Energy harvesting tech, for longer periods of monitoring without user intervention;-Wired or acoustic network, allowing efficient energy management or highly versatile deployment;Wave MonitoringWave and Tide Monitoring SystemTide cycles-Tides are affected by the moon and sun’s gravity;-High and low tide refer to a 12 hours and 25 minutes cycle.Tide Monitoring-When the moon and the sun’s gravity act in perpendicular to each other, it results in a lower amplitude tide;-It is called Neap tide.-When the moon and the sun are aligned, it results in a higher amplitude tide;- This is called Spring tide.1/21/2021 0:00 1/24/2021 15:59 1/28/2021 7:58 1/31/2021 23:57901502102703301011121314Depth and Temperature from 21-jan to 31-janDepth TemperatureDepth (cm)Temperature ( ̊C)-Sensor deployed in the estuary of the Cávado River;-It was possible the distinguish the two daily high/low tide cycle, as well as the Neap tide in the first days and the Spring tide seven days later.Tidal bulge from the sunTidal bulge from the moonTotal tidal bulgeWhat produces waves?-Most sea waves are caused by wind;-Occasionally may be caused by tectonic plates shifts (such as tsunamis);-In lakes and river, a boat or ship passing by also produces waves.0 5 10 15 20 25 30278280282284286288290292Wave Profile of a Boat Passing in the River Time (s)Depth (cm)Measuring river waves-A passing boat generates waves large enough to disturb the riverbank and accelerate erosion;-Sensor installed 2.8 m deep;-Waves up to 10 cm measured;-The pressure is attenuated as it propagates down the water, making 20 cm waves seem like      10 cm.Measuring sea waves-Sensor dropped to a depth of 26 m;-Wave’s profile and frequency easily identified;-The amplitude needs to be calibrated, because the pressure propagation is attenuated the deeper the sensor is installed.J.L. Rocha1 T.Matos1 C.L. Faria1 C.M. Penso1 M.S. Martins3 P.A. Gomes4 L.M. Gonçalves1,21 CMEMS-UMinho, University of Minho, Guimarães, Portugal2 LABBELS—Associate Laboratory, Guimarães, Portugal3 INESC-TEC, Porto, Portugal4 CBMA, University of Minho, Braga, PortugalThis work was co-funded by project ATLÂNTIDA (NORTE-01-0145-FEDER-000040) and CMEMS UIDB/04436/2020. João Rocha was supported by the doctoral Grant PRT/BD/154322/2023 financed by the Portuguese Foundation for Science and Technology (FCT), with funds from Portuguese State Budget, European Social Fund (ESF) and Por_Norte, under MIT Portugal Program.

Wave profile and tide monitoring system for scalable implementation

https://repositorium.sdum.uminho.pt/bitstream/1822/85235/1/Wave%20profile%20and%20tide%20monitoring%20system%20for%20scalable%20Implementation%20FTC%20%284%29.pdf

Wave profile and tide monitoring system for scalable implementation

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Universidade do Minho: RepositoriUM