Additional information
| Brand | HR Wallingford |
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Force Measurement System
Our force measurement system models the forces on ship mooring lines and fenders in a variety of sea states.
The simplicity of operation together with bespoke data analysis software make these devices the ideal choice for all physical modelling requirements.
Our force measurement system includes:
- 2 x fender force transducers
- 6 x mooring line transducers
- 8 x 40m extension cables
- 1 x 8-channel conditioning with analogue output unit
Key features
- Options for ship fender and mooring line applications
- Range of springs supplied for mooring lines to give non linear responses
- Strain gauge range 0-5N
- Simple to install and operate
- Made from corrosion resistant materials
- Operates with HR DAQ
100% Original and qualityRelated products
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Marine, Naval, Hydrodinamic and OceanographInstrument Traverse System
The instrument traverse system is used to move a range of physical modelling instrumentation to a variety of different positions within a flume or basin in either two or three dimensions.
The instruments are secured to the vertical axis of the system, using a variety of fixings. The vertical axis is attached to a carriage which moves along a fixed horizontal beam to allow positioning of the instruments anywhere within the flume or basin. The traverser can be controlled by a software application that logs the exact time-stamped position of the instruments to an accuracy of ±0.5mm in both vertical and horizontal axes. A stepper motor with an integral encoder is used to drive each axis into position along the carriage using a toothed belt arrangement.
Our Instrument Traverse Systems are individually designed for each application. Check the specification tab on the left for a typical specification.
Key features
- Positions a number of instruments within a flume or basin to a repeatable accuracy of ±0.5mm
- Supplied with a PC and software which controls the movement of instruments
- Lightweight, modular system
- All systems are designed to suit the client’s individual requirements for horizontal span and vertical movement
A typical specification would be:
Horizontal beam (x-axis)
- Maximum overall length: 6m
- Maximum travel: 5.8m
- Maximum velocity: 50mm/s
- Positional accuracy: ±0.5mm
Horizontal beam (y-axis)
- Overall length: 4m (dual motors required for lengths >2.0m)
- Travel: 3.8m
- Maximum velocity: 50mm/s
- Positional accuracy: ±0.5mm
Vertical beam (z-axis)
- Travel: 0.6m or 1.2m
- Maximum velocity: 25mm/s
- Positional accuracy: ±0.5mm
- Lifted weight of instruments: 5kg
- Supply voltage: 220V AC or 110V AC
In addition to the standard 2- and 3- axis systems, a second independent carriage can also be added to the horizontal beam.
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Marine, Naval, Hydrodinamic and OceanographWavemaker for 3D Basins
The multi-element wavemaker is used to create long and short crested waves for either deep or shallow water.
Piston type wavemakers
HR Wallingford’s piston-type multi-element wavemakers are made up from a number of self contained eight-paddle modules. This enables them to be easily installed, moved to different positions within the basin and to be extended as required.
These wavemakers are predominantly used in shallow water applications of up to 1m depth.
Hinge type wavemakers
HR Wallingford also supplies wavemakers for deep water basins and towing tanks. These hinge type paddles are again supplied in modular frames, each with four paddles that are fixed to the inside of the basin. The design of the hinge wavemaker support frame is such that it can be incorporated into basins and towing tanks with a two point fixing system that allows the modules to be removed for periodic maintenance.
Paddle drive system
Paddle width varies from 0.5-0.75m depending upon the client’s requirements. All paddles are of a wet-back design which means that there are no complicated seals between paddles or the basin walls and the floor. The paddles are mounted on linear slide assemblies that are supported from a common framework for the piston paddles. This leaves all motors, bearings and precision components well above the water level.
Custom-built and straightforward installation with on-going support and training
Each wavemaker is custom-built to meet the client’s requirements and is equipped with HR Wallingford’s Active Wave Absorption System. Installation is straightforward with HR Wallingford providing commissioning, training and on-going support.
Key features
- Generates short and long-crested random waves at normal and oblique angles using HR Merlin signal generation software
- Dynamic Wave Absorption guarantees precise control of wave conditions
- Wet-backed piston paddles ensure that performance is not limited by stroke for shallow water applications
- Stainless steel and GRP construction delivers a design life in excess of 20 years
- Digital AC servo motors provide precise control and rapid response
- Wavemakers supplied in either 4 or 8 paddle modules for ease of installation
- Easy to maintain with all bearings and precision components above water
- Hinge flap wavemakers are available for deep water basins, designed for easy removal of modules for maintenance tasks
- HR Wavemakers use HR Merlin wave generation software
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