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Home / Articles and Press Releases / Press Release / Robot Fish for Environmental Monitoring

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Press Release

Robot Fish for Environmental Monitoring

By Technical University of Madrid

| Read Bio

Published: May 12th, 2017

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Researchers from UPM and University of Florence are developing a bio-inspired robot equipped with special chemical sensors able to detect the pH of water.

A group of researchers from Centre for Automation and Robotics (CAR CSIC-UPM) in collaboration with researchers from University of Florence are designing autonomous underwater vehicle with biosensors to monitor water quality. These robots, that mimic a swimming fish in order to minimize the fish disturbance and stress, can detect in-situ real-time anomalies and this is suitable to control environmental conditions in fish farms.

Aquaculture has become the fastest growing animal food sector in the world. Today, the production of fish, crustaceans and shellfish supplies around fifty percentages of all fish that is consumed by humans globally. In order to keep aquaculture systems at an optimal level and to avoid physiological stress and disease of fish, water quality and adequate nutrition must be monitored and controlled.

In order to tackle this problem, researchers from Bio-inspired Systems Lab at CAR UPM-CSIC, a joint centre between Universidad Politécnica de Madrid and the Spanish National Research Council, in collaboration with researchers from the Chemical Department of University of Florence (Italy) are developing an autonomous underwater vehicle with biosensor to provide real-time and on-site monitoring of water quality in fish farms.

the robotic fish is able to change its swimming patterns

In order to minimize the inconveniences and possible stress in fish, the developed robot is bio-mimetic, that is, that mimics both its appearance and its functioning. In addition to providing water data, the robotic fish is also able to modify the way they swim according to the water conditions with the purpose of, for example, to detect and highlight the areas of concentration. Because water acidity directly affect other indicators both water quality and fish health, researchers have developed a special electrochemical pH sensor based on polyaniline film electrochemically deposited on the graphite screen-printed electrode surface. Thanks to this, the robotic fish is able to change its swimming patterns according to the information sent by this sensor.

The overall length of the fish is 30 cm without including the tail. The prototype adopts shape memory alloys actuators that bend a continuous flexible structure (the backbone of the robot fish), made of polycarbonate of 1 mm thickness. An additional structure of ribs was employed to support the latex-based skin.

According to Claudio Rossi, a developer of this bio-inspired fish, “thanks to this system that provides early information on environmental change, we can control the parameters of water quality and improve management decisions of fish farms, and consequently, the wellness of these animals”.

Ravalli, Andrea; Rossi, Claudio; Marrazza, Giovanna. Bio-inspired fish robot based on chemical sensors. SENSORS AND ACTUATORS B-CHEMICAL 239: 325-329. DOI: 10.1016/j.snb.2016.08.030. FEB 2017.

Main picture: Prototype of the robotic fish. C.Rossi, UPM

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ABOUT THE AUTHOR

Technical University of Madrid

he Technical University of Madrid (UPM) was founded in 1971 through the integration of the Higher Technical Schools which up until then made up the Higher Technical Institutes. The University Schools joined the following year. The Technical University of Madrid has, among its objectives, the creation, development, transmission and criticism of science, technology, and culture. To this end it also works from its Institutes and Research Centres, assimilating the changes taking place in out society and maintaining its vocation for excellence, which is why it has both national and international recognition.

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