Research On Interference Factors And The Compensation To High-speed Dynamic Weighing Signal

The accuracy problem will always be the core issues of vehicle weighing-in-motion(WIM). The WIM system for portable axle load scales is built by using ADAMS based on the factors such as speed, weight and vibration. The effect to prove the accuracy of weigh-in-motion is fine obviously as shown this paper. Followings are the main contents in this paper:(1) Weighing experiment system mentioned this paper collected weighing data which was satisfied the 400 k Hz sampling Rate. After all of the hardware design was done, the calibration experiments then began.(2) The creation and verification of mechanical model was based on experiment system mentioned above and 3D model of two axes vehicles, which was modeling in the 3D software and setting constraints in ADAMS. Comparing with the actual data from WIM system and simulation data, in which we found that the error value between numerical simulation and actual data is below 5% at speeds slower than 30km/h, with the reliability of the model being proved and processing simulation data directly.(3) Speed and vibration compensation of model was researched by comparing with simulation signal and ideal signal. Signal curve was classified by the type of vibration, then compensation mechanism was made for corresponding type. Based on the ADAMS model simulation, speed compensation was raised and really applied to the signal compensated. The combination of the two compensation algorithms called half sine wave compensation algorithms. All of these data this paper showed that the compensation effect was better with the higher speed and the accuracy of WIM is improved, especially at the 30 km/h, the maximum compensation amount reached 10% when the car weighed 20 ton, and the relative error between compensated data and true value is below 3%.