The use of sensors are essential for monitoring and understanding the marine
environment and in particular for renewable energy technologies they provide essential
information in terms of the behaviour and operation of devices. In existing field
deployments various issues have arisen with regard to the use of sensors mainly related
to incorrect sensor selection as well as sensor failure or malfunction, Very often sensors
are given low priority by developers and their selection is often based on cost rather than
suitability for use in a marine environment. Much work needs to done to modify the sensors
to gather the optimal information that will best benefit marine renewable energy
technologies. Time and resources are also required to install, collect and analysis the data.
Selkie will optimise sensor selection procedures and demonstrate the benefit of good
sensor selection in the wave and tidal pilot projects. In addition Selkie will modify and
adapt off-the-shelf sensors for wave and tidal applications.
The aims of work in this WP is to enable better sensor selection, design and application,
provide improved redundancy, reliability and flexibility, have low power requirements and
The specific objectives of the work package are:
1. To develop guidelines and procedures that will improve the selection of sensors
for use in wave and tidal technologies
2. To Select, modify and test chosen Sensors suitable for Irish and Welsh wave
and tidal energy technologies
3. Build of a converging beam ADCP for current, wave and turbulence
4. Design, and install sensors for the two pilot projects. Monitor their operation,
assess data quality and provide recommendations for future deployments
Targets achieved in deliverable
Number of enterprises cooperating with research institutions: 2 (two organisations
will be involved in the prototype build and test programme.
1 out of 4 New to market products,
SU will be developing one new Sensors product
1 out of 8 new to the firm products
Description of work
T7.0 Work package coordination (*SU): liaising with project coordinator. Making sure all
deliverables are delivered on time.
T7.1 Sensor selection guidelines and procedures (UCC *SU)
This task will firstly provide an overview of typical wave and tidal energy requirements in
terms of data collection. When deploying a technology at sea a variety of information
needs to be collected and relayed to shore such that to monitor the operation and
subsequently understand the overall performance of the device. Measuring the resource
(wave or tidal conditions) is essential and depending on the technology type a variety of
other data is needed which can include structural and mooring loads, pressures, torques,
rotational speeds, water surface elevations, motions, electrical output etc. This task will
list types that are on the market, based on data types.
examine strategy and redundancy in terms of sensor selection.
identify gaps in terms of current sensors types that do not provide the required
information to the accuracy required, are too expensive or are not sufficiently
robust to operate and survive in harsh marine conditions that sensor
provide guidelines for the selection of suitable sensors
T7.2 Select and modify Sensors (UCC *SU, and all partners)
Based on the previous analysis, this task will design new sensors or modify existing
sensors such that they specifically meet the requirements of the wave and tidal industries.
The experience of the project partners will facilitate the development of additional or better
functionality through modification and testing in relation to:
minimising power requirements
enhancing survivability such and minimising sensor failure in order to reduce
The following sensor types will be examined:
strain gauges, load cells, pressure gauges, acoustic gauges, wave buoys etc.
The sensor development work will be validated through the pilot case studies in T7.3.
T7.3 Build of a converging beam ADCP (UCC *SU)
One specific item already identified is to build a converging beam ADCP for current, wave
and turbulence measurements. This will include the following stages:
In consultation with users and deployment vessel operators, develop an
engineering product design specification for the device.
Undertake options analysis and select the design option with the right combination
of quality of measurements, subsea reliability and cost.
Specify and procure the Doppler sensors required for the instrument (together with
Undertake detail design and design for manufacture.
Manufacture the demonstrator sensor, undertake commissioning and calibrate it
prior to trial in the next task.
T7.4 Conduct Sensors tests for Wave and Tidal projects (UCC, *SU,)
This task, which links closely with T7.1 and T7.2 and will:
develop, test and validate a sensor system for each of the pilot studies, applying
the guidelines developed in T7.1 to provide a sensor strategy for each of the wave
and tidal technologies.
procure and modify sensors prior to installation of the devices. (In Lir test tank)
Install sensors on pilots ( this will require use of boat tendered.
Their operation will be monitored throughout the deployments to ensure they are
providing accurate data.
On completion of the pilots an overall assessment will be made, with input from
the pilot developers and other stakeholders, to determine the overall feasibility of
the methods and sensors developed and its general application to the wider
D7.1 Report of existing Sensors available best suited for wave and tidal applications.
Modified off the shelf sensors is not seen as a deliverable
D7.2 Build of a converging beam ADCP for current, wave and turbulence measurements
D7.3 Wave pilot:, Analysis and Conclusions suitability of sensors
D7.4 Tidal pilot: Analysis and Conclusions suitability of sensors