Contactless Video Extensometers

  • Deformation measurement of samples during material testing with use of the Video extensometer MercuryRT allows applying multiple virtual probes (Movement Sensors)on markers and advanced image featuresto be tracked, including the natural pattern of the sample surfaces.The common resolution of standard system is within 500 nm and 5 m. The system fulfils class 0.5 or B-1 of classification according to ISO 9513 and ASTM E83. In certain camera use case, the system resolution reaches the level of 100 nm - 500 nm and system fulfils the class 0.2. The strain resolution can reach 10 microstrains. Material testing,Component testing ,FEA validation,Vibrography .

  • 1、Multiple virtual extensometers per camera input
    2、Modular concept beginning by simple camera recorder up to multicamera 3D fullfield system with shaker
    3、Wide scope of engineering use:Material testing,FEA validation,Component testing,Vibrography
    4、Multi-threaded parallel computation for optimal measurement speed
    5、Enhanced graphical user Interface with intuitive controls. Highly efficient video display using OpenGL acceleration
    6、Simple system calibration including arbitrarily moveable coordinate system
    7、The system can also be used on natural, non-prepared surfaces (such as wood, fabric, material structure and roughness,...)
    8、Customizable export formats
    9、Connectivity to a large number of test rigs types
    10、System allows to operate with DOLI based equipments
    11、Simultaneous data recording and computing
    12、Videostroboscopic functionality (synchronization with periodic phenomena)

  • Parameters

    Range depending on the configuration

    Typical system

    Classification to ISO 9513

    Class 0.2, 0.5, 1, 2, -

    Class 1

    Classification to ASTM E 83

    Class A, B-1, B-2, C, D, E, -

    Class B-1

    Field of View (FOV)

    2-2000mm Could be increased by different optical system

    60 mm

    Gauge Range

    0.01-800 %

    0.01-10 %

    Resolution

    0.1-50um Could be increased by different optical system

    1 um

    Analog output

    10-16 bit

    4V/14 bit

    Digital output

    RS232/422/485, TCP/IP

    TCP/IP

    Camera resolution

    0.3-29 MPx

    1.2 MPx

    Data rate

    0.1-10 000 Hz

    50 Hz


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Video extensometer is based on computer vision algorithms used together with industrial cameras. With proper selection of camera lenses – the system can be applied to any application from microscopic to macroscopic size:
1、Metal samples, wires and foils
2、Wooden samples and composites
3、Various fabrics and nanofiber structures
4、Elastomers and tissues
5、Plastic samples and biomaterials
6、Cords and ropes
7、Concrete samples and ceramics materials