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The Model ECI-SFT 16.PP57.01 from Electro Communications Research Institute (ECI) is one of the most proven digital servo-controllers available for full-scale structural testing under both static and cyclic loading conditions. Full-scale strength and fatigue life evaluation for airworthiness certification of well-known transport and military aircraft including the Tu-204 passenger liner, Mig-29, Su-27 and Su-30 were performed on test rigs controlled by ECI-SFT controllers. More recently, the system was chosen for full-scale structural testing for endurance of the Sukhoi-Boeing Russian Super Jet program.
The quality and reliability of the ECI-SFT16.PP57.01 are ensured by exclusive use of B&R electronic hardware modules which serve as a global industry standard. The system and application software supplied with the ECI-SFT 16.PP57.01 reflect many years of experience of the Siberian Aircraft Research Institute (SibNIA). ECI is the prime contractor for full-scale test controls at SibNIA. The vast structural test hardware base at SibNIA with over 15, 000 sq. meters of test floor space and over a thousand servo-actuators served as the proving grounds for the ECI-SFT16.PP57.01.
Most full-scale structural tests on airframes require more than 16 channels of control. The Model ECI-SFT16.PP57.01 controller is engineered for operation in a real-time high-speed digital network. There is practically no limit on the No. of channels achievable using multiple Model ECI- SFT16.PP57.01controllers, connected to a single Master Host Computer. Up to 256 Model ECI-SFT16.PP57.01controllers can be connected to a single hub limited to 4096 control channels. B&R modules are engineered for operating in a networked environment with a wide choice of communication protocols, all of which are supported by application software drivers
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Applications
A new, compact system for shape, deformation and strain analysisComplete surface strain map during standard materials testingFull field DIC measurements at Very High Temperatures
Digital Image Correlation (DIC) is rapidly becoming a standard non-intrusive instrument formaterials testing. LaVisions StrainMaster Portable is a compact and lightweight turnkey 2D and 3D DIC system for shape, deformation and strain measurement.Suitable for a huge range of applications where flexibility and portability is essential, LaVisions StrainMaster system is appropriate for a wide range of subject sizes.
The StrainMaster Portable software is comprehensive, accurate, fast, and very user friendly.Comprising state of the art laptop computer, highly sensitive Imager E-Lite cameras, and coldillumination system, this device is dedicated to the study and analysis of material behavior.
With vast experience in the area of scientific imaging systems and Digital Imaging Correlation(DIC), LaVision provides the ultimate in quality and performance for your materialsmeasurements needs. Comprehensive service and support is given throughout the life of theproduct via our factory trained engineers.
2D & 3D DIGITAL IMAGE CORRELATION SYSTEMSWithin the StrainMaster DIC software, a Least Squares Matching (LSM) approach with subset deformation is used to match the pattern in combination with higher order spline interpolation of the grey scale images.
Usually, the displacement field is calculated relative to the specimen in its undeformed state (typically the first image in the sequence). In cases where the deformation is relatively small the pattern in image N is matched directly back to the reference image. However, for large deformations the local pattern experiences significant changes and a sum of differential approach is used whereby the pattern is matched between successive images and then summed in a Lagrangian co-ordinate system.
Full ControlThe DaVis platform offers complete hardware control with no need to rely on home-made triggering or separate multiple control porgrammes. It is possible to build acquisition loops specialized timing schemes.
Phase locked recording of cyclic events such as fatigue testing is possible with the Strain Master controller and post-triggering of high speed events such as Split-Hopkinson pressure bar test is straightforward.
Operating in live mode or as a post-process, it is possible to apply virtual strain gages to the specimen surface. This approach using optical techniques has several advantages over conventional devices:
StrainMaster includes a crack growth analysis module to identify and track crack development in materials reporting crack length and crack opening.
This module works with non-speckled surfaces and the standard StrainMaster hardware.
StrainMaster Digital Volume Correlation (DVC) is a novel technique for full 3D strain anddeformation measurements. The technique imports volume images of the component inreference and deformed states and is able to calculate the full 3D displacement and strainmap. Images are typically acquired from X-ray Computed Tomography (X-ray CT) systems, but can equally be obtained by Magnetic Resonance Imaging (MRI) systems for biologicalsubjects, or via optical tomography for transparent media; for which LaVision offer ourpatented Tomographic reconstruction algorithms as an add-on.
DVC is a powerful non-intrusivetechnique for the identification of sub-surface material deformation and is capable of identifying defects, discontinuities or other material characteristics.
Like its counterpart, Digital Image Correlation (DIC) which is restricted to surface-only measurements, in order for Digital Volume Correlation to be successful the volume imagesmust contain a random pattern. That random pattern is seen as changes in local contrast. Inthe case of X-ray CT scans the pattern will be produced by changes in material density suchas air voids in concrete, or particles of different material type within the main body matrix, such as tin particles distributed in an aluminium powder.
The volume image is sub-divided intointerrogation volumes within which robust and highly accurate algorithms calculate thedisplacement of the pattern, which represent the material shift. Digital Volume Correlationis capable of yielding over one million displacement vectors per volume image pair.
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LaVision FlowMaster system family evaluates three-dimensional velocity vector fields from scattered light patterns of particles or droplets seeded into the flow (liquid or gas). Techniques like Particle Image Velocimetry (PIV) and Particle Tracking Velocimetry (PTV) are supported. LaVision's FlowMaster PIV cameras can record two successive images within min. time < 100 ns for ultrafast cross-correlation and speeds up to Mach 4. Standard 2D-PIV (2D2C) measures two velocity components in a plane using a single CCD or sCMOS camera. Stereo-PIV(2D3C) measures three velocity components in a plane using two cameras. Time-resolved PIV measures two or three velocity components in a plane at high frame rates up to 25000 fps Tomographic PIV (Tomo-PIV) measures three velocity components in a volume (3D3C) using two or more cameras. Micro-PIV measures two or three velocity components of particle seeded flows with micron scale spatial resolution.
Applications :Liquid and gas flow investigations in wind tunnels, water channels, in-cylinder engines industrial flow systems, compressors, turbines, fans, pumps, Micro Electro Mechanical Systems (MEMS)
