Falling Weight Deflectometer (FWD)

The falling weight deflectometer (FWD) is a trailer-mounted, non-destructive, high-precision, testing system used to evaluate pavement conditions and physical properties. It simulates the load when a car passes over the pavement to measure its vertical deflection response to that load. It is convenient, fast, safe and labor-saving, and is suitable for long-distance and continuous measurement.
FWD is mainly composed of the main frame, operating mechanism, falling weight assembly, hydraulic system, sensor system, electrical system, monitoring and safety guidance system, etc. Equipped with data acquisition and processing software, which can record the original data of deflection, load, temperature and relevant pavement information such as pile number, realize data normalization processing, various error calculations, etc., and analyze the data and make them into charts and reports.
It can accurately assess the structural condition of highways, local roads, parking lots and airport runways, and can also be applied to roadbeds and subbases during construction. It is widely used in road research, design, reconstruction and pavement management.

FEATURES
◎Fully automatic "one-touch" operation. A "one-touch" button is installed in the cab. After reaching the test position, the user only needs to press the button and the equipment will automatically run. After the test is completed, the equipment will automatically be locked for transportation.
◎The single-point detection and collection time is within 20 seconds (three times of lifting and dropping the hammer and collecting data are completed in accordance with the specifications).
◎High measurement accuracy. The FWD system is scientifically designed. High-performance sensors, high-precision and high-speed data acquisition system, and customized digital signal processing algorithms ensure the accuracy and reliability of deflection data.
◎Safety interlock protection device. An interlocking joint is installed between the deflectometer and the test vehicle. During the movement of the test vehicle, the equipment is in a protected state and operation is not allowed, which effectively protects the safety of the equipment and the test vehicle.
◎It has dual synchronous lifting platforms, which makes data collection more stable and improves data accuracy.
◎Each main function has an alternative second solution (or function) to improve the reliability of the whole equipment.