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    Falling ball type resilient modulus tester

    Device name
    Falling ball tester for geotechnical mechanical

    Patent name: Method for improving acceleration

    test of portable deflection instrument (H-FWD) by

    using acceleration sensor


    Patent name: Field test method and device for mechanical

    properties of falling ball geotechnical materials

    Patent No:ZL200510021852.X

    Patent No:ZL200810087044.7

    Related patents



     This technology is based on the Hertz impact theory and Vesic cavity

    expansion theory, which can test the deformation modulus during

    compression and rebound, so as to estimate the corresponding

    deformation index (material deformation modulus, strength index) of

    rock mass materials.


    Test principle and method


     Achievements and

    technical characteristics


    Test method for deformation characteristics of rock and soil materials based on

    Hertz impact theory;
    Test method for strength characteristics of geotechnical materials based on

    Vesic cavity expansion theory;
    It can quickly test the on-site mechanical properties of a wide range of

    materials from soft clay, sand, gravel to cement stabilized soil, and asphalt

    concrete, which has obvious advantages compared with existing PFWD / EVD.


     product description


    This equipment is specifically designed to detect the rebound modulus

    of the roadbed and pavement. It is easy to use and has powerful

    graphics processing functions. In addition, the device supports the

    database system CI-DBS, and can be connected to the BQIM system to

    realize the detection result visualization.





     Direct testing of material deformation

    / rebound modulus
    In line with the new road design and







     Easy testing and

    high efficiency


    High test accuracy

    and repeatability


    Test items


     Test object: excavation / filling engineering, geotechnical materials
    Test content: Geomechanical characteristics (material deformation

    modulus, rebound modulus, strength index K30, deflection,


     Falling ball type

    resilient modulus tester


    Corresponding parameter set not found, please add it in property template of background
    1 Provide database management services, and can be docked with BIM system, to achieve the visualization of test results model; with the database linkage, can carry out test results cloud AI (artificial intelligence) analysis.
    2 operating system:windows
    3 Waveform Noise and Signal Processing Technology: Mobile Smoothing, BPF, EMD, Integral Processing, Average Processing
    4 Deformation Index Testing Method: Based on Hertz Impact Theory
    5 Channel number: 2 channels (VMC technology can be extended to multiple channels), trigger channels and receive channels are interchangeable
    6 Data acquisition: support touch, wireless dual mode; support single, continuous dual mode sampling
    7 working temperature:0~45℃                                              
    8 Sampling accuracy: floating-point interpolation compensation to 24 bits
    9 Maximum acquisition frequency: 500KHz, adjustable                      
    10 Maximum acquisition points: 20,000, adjustable
    11 Maximum/Minimum Voltage Display:10V/0.0001V
    12 Display: LCD 1280*800
    13 Result Data Statistical Processing: Equivalent Value Computation, Simple Average, Deviation and Elimination of Abnormal Data
    14 Deformation Index Testing Contents: Compression Modulus and Rebound Modulus
    15 Maximum test depth:0.3m
    16 Location information: supporting GPS positioning



    Instrument mainframe

    Drop ball







    A Highway Project in Japan


    A highway in Shanxi

    An Airport in Japan


    Zhejiang 320 National Highway. Fuyang Section



    Device name
    Falling ball tester for geotechnical mechanical
    Device name
    Geotechnical acoustic wave tester
    Device name
    Cross hole rock mass mechanical property
    No content information display available
    Please add data record on website background.