The Research of Weigh-in-Motion Sensor Layout Based on Data Fusion

Weigh-in-motion (WIM) is a better way that can gain the true weight of vehicle which is moving on the highway at a high speed. In this paper, the principle of piezoelectric sensor is introduced, and the WIM signal model is simplified. The application of data fusion approach is used on the basis of piezoelectric sensors, and the proper redistribution of sensors is used to gain the WIM model, then the expected value which is closer to the true axle load can be gained by the Gass-Newton method. The simulation of the different speed errors when the initial phases are different according to a layout shows that the accuracy is adequate.