I. Overview: This test vehicle is compatible with two types of testing equipment.
Part 1, road technical status indicators: flatness, rutting, structural depth and three-dimensional
damage rate detection.
Part 2, Pavement Bearing Capacity Test: Drop Hammer Deflectometer
Uses: It is used for preventive maintenance inspection of pavements in construction, especially for
various roads, and provides comprehensive and efficient data support for pavement management
systems.
1) Flatness detection of various road surfaces, giving the profile of the pavement profile and
standard deviation, the international flatness index IRI, especially the flatness change table of all
the longitudinal sections of the road.
2) Cross-section elevation curve of road rut depth index, maximum elevation change flow diagram
of cross section of all road sections
3) Three-dimensional changes in the whole road surface and three-dimensional damage.
4) Construction depth, all localities of the whole road, especially the three-dimensional structure
and structural depth values of the wheel track.
5) Deflection value of the road surface, curved and sinking curve.
2. Technical characteristics and technical parameters of various technical indicators
 rutting measurement:
1) Cross-section rutting shape, rut section curve
2) Rut depth index
3) The maximum depth of the rut along the longitudinal section changes
4) Depth depth measurement accuracy: 1 mm
5) rut depth dynamic range: greater than 200 mm
6) rut detection lateral width: more than 2 meters until the full lane

7) The horizontal elevation measurement data interval can be as small as millimeters, which is
equivalent to the tens of probes
Flatness measurement: The international flatness meter only gives the flatness value of a longitudinal
section. IRI also has a low speed limit and appearance that must be greater than 25 km/h.Turning
data is abnormal. This device is based on full-channel 3D measurement and can give any profile
elevation curve and flatness value, standard deviation and IRI
1) Longitudinal elevation measurement resolution 0.5 mm
2) The detection speed range is large, from zero to any car speed
3) Repeat deviation cv<3
4) Detection dynamic range 0-15m/km
Structural depth measurement features: The sand sedimentation method has been recognized as
the standard measurement method for structural depth and serves as a benchmark for other methods.
Because of the physical model of the method.Correctly reflect the physical nature of the wheel contact
gap and friction. However, the dynamic measurement at home and abroad uses the statistical
 calculation of single profile elevation measurement data. And have to addMany corrections with
unclear physical meanings are consistent with the results of the sand stacking method. We built a
three-dimensional volume measurement model of wheel and ground clearance according to the sand
measurement model.The height of the 300 mm section gap is measured on the wheel scale, and the
gap volume and average depth are strictly calculated.
1) Cross section scan width 300 mm
2) Scanning longitudinal interval 10 mm (calibration measurement)
3) The elevation measurement resolution is 0.5---0.2 mm (calibration measurement), and the
statistical general measurement can be relaxed to 0.5 mm.
4) Long repeatability, long-term structural depth measurement problem, the method has good
repeatability cv can reach 3--10% (different undulating road surface).

Drop hammer deflection
 1.Impact load: can reach 0~130KN (expandable), set to 50KN at the factory
2.Dynamic force measurement range: 0 ~ 250KN (expandable)
3.Load measurement accuracy: ��1%
4.Load pulse shape: half sine wave; pulse duration: <30ms
5.Displacement measurement range: ��3.5mm (optional ��5mm)
6.Deflection accuracy: �� 2%
7.Number of displacement sensors: 1~9 (optional)
8.Test speed per point: 15~20 seconds/point measurement three times (enable fast measurement
software can be reduced to 10 seconds/point)
9.Lifting hammer method: hydraulic load plate lifting and lowering mode: hydraulic
10.Temperature sensor type: platinum resistance + infrared probe Temperature range: -25~100��C
11.Walking speed: ~120km/h (depending on road conditions)
12.DMI distance sensor accuracy: 0.1% deflection resolution: ��0.2m