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2D Video Extensometer

The 2D Video Extensometer is a non-contact, two-dimensional extensometer based on Digital Image Correlation (DIC) technology. The measuring head captures images of the specimen throughout the loading process, while the software performs real-time image analysis and outputs deformation results. When used with full-field strain measurement and analysis software, it enables full-field displacement and strain measurement.


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Application Fields

  • Tensile, compression, bending and shear testing of flat specimens, and more.

Technical Highlights

  • Class 0.5 Accuracy

  • Large Deformation Measurement

  • Automatic Target Recognition

  • Real-Time Measurement

  • Factory-Calibrated System

Product Features

  • 1Strain measurement range: 0–1000%
  • 2Stable measurement in extreme-temperature environments ranging from −190°C to 2600°C
  • 3Automatically recognizes various types of markers, including circular, horizontal-line, cross-shaped and QR-code markers
  • 4Receives real-time force data from the testing machine and automatically generates stress–strain curves
  • 5Supports manual gauge-length input for flat specimens of different sizes
  • 6Not limited by specimen shape or size, and suitable for plates, rods, sheets, wires, films, concrete, soft materials, biological materials and more
  • 7Complies with the Class 0.5 accuracy requirements of JJG 762-2007
  • 8Residual grayscale-field measurement for accurately determining crack propagation width and length
  • 9Boundary-recognition measurement calculates width deformation at up to 32 locations, capturing deformation details comprehensively
  • 10Simultaneously performs multi-gauge-length measurements in both axial and transverse directions, obtaining multidimensional data in a single test
  • 11Supports n-value and r-value measurement with a flexibly adjustable strain selection range
  • 11Equipped with a fatigue down-sampling module to fit fatigue loading curves and acquire deformation data across multiple cycles
  • 12Uses multiple camera systems to accurately measure reduction of area and elongation after fracture

Solutions

Application Cases

N-value and R-valueVideo extensometer
N-Value and R-Value Measurement of Sheet Metal

For formability testing of metal sheet, traditional methods need several extensometer sets and cannot accurately measure maximum width deformation. The Haytham video extensometer extracts multiple gauge-length data sets in a single loading and automatically completes the calculation, delivering n-value and r-value results efficiently.

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Material strainHigh-cycle fatigue
High-Cycle Fatigue Test of Metal Materials

In high-cycle fatigue testing, fatigue performance directly affects structural reliability under long-term repeated loading. Traditional DIC systems usually need more than 10 frames within a single fatigue cycle, placing extreme demands on equipment. Haytham's non-contact DIC measurement meets this challenge with dependable strain data.

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Crack propagation analysisDIC system
Double-Cantilever Crack Propagation Analysis

The double-cantilever beam test is an important method for studying fracture toughness and crack propagation. Measuring the crack's propagation length, width, and trajectory provides deep insight into fracture behavior. Non-contact DIC full-field measurement tracks the crack continuously for accurate propagation data.

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Elongation after fractureTotal fracture elongation
Measurement of Elongation After Fracture, Total Fracture Elongation and Reduction of Area

In mechanical testing, elongation after fracture, total fracture elongation, and reduction of area are core indicators of ductility and toughness. Traditional methods often leave testers with low efficiency and high error. Automatic DIC measurement tracks the specimen through fracture and delivers all three values accurately.

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Elongation after fractureFracture testing
Rebar Elongation After Fracture Measurement: A More Stable Vision-Based Solution

In rebar tensile testing, elongation after fracture is a key parameter of plasticity and ductility and a core indicator in steel quality control. Front-line testers often struggle to get stable, repeatable readings. Vision-based non-contact measurement tracks the specimen through fracture for stable, repeatable results.

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Poisson's ratio measurementVideo extensometer
Poisson's Ratio Measurement of Metal Bars

In Poisson's ratio measurement of metal bars, transverse strain amplitudes are very low in the small-deformation stage, limiting the accuracy of traditional extensometers. The Haytham video extensometer extracts axial and transverse strain without contact, stably outputting the Poisson's ratio evolution curve for better constitutive characterization.

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Aluminum rod tensile testingVideo extensometer
Unmarked Tensile Test of Aluminum Rod

Traditional image correlation algorithms tend to fail on weak-texture specimens such as aluminum rods. The Haytham video extensometer uses optimized acquisition and processing algorithms to track gauge-section deformation stably under low texture. It suits polished specimens and composite interface analysis, delivering dependable results without surface marking.

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Compression deformation measurementDIC technology
Unmarked Compression Deformation Measurement of Composite Materials

In compression testing of composites, some surfaces are uniform in color and weak in texture, with no stable identifiable natural features. Speckle or marker-based measurement is complex to implement and may alter the material's surface state and loading behavior. Marker-free DIC avoids surface preparation and delivers accurate full-field compression deformation data.

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