落锤式弯沉仪测量结果不确定度评定

Evaluation of Uncertainty of Measurement Results of Falling Weight Deflectometer

落锤式弯沉仪是交通行业检测路基路面结构承载力的专用设备,其检定和校准主要依据JJG(交通)133-2017《落锤式弯沉仪》检定规程。本文对落锤式弯沉仪的荷载准确性、弯沉准确性、温度传感器示值误差和里程计示值误差的测量不确定度进行了分析,并给出了测量结果的不确定度。

The falling weight deflectometer was a special equipment for testing the bearing capacity of subgrade and pavement structures in the transportation trade, its verification and calibration were mainly based on the verification regulation of JJG(Traffic)133-2017 Falling Weight Deflectometer. In the paper, the measurement uncertainty of load accuracy, deflection accuracy, temperature sensor error and odometer error of drop hammer deflector had been analyzed, and the measurement uncertainty was been given.