고정확도 동적 중량계측 기술의 개발과 평가

Development of high accuracy weigh in motion system and Evaluation on the road

Maintenance of the roads and bridges is a major issue for all road administrators around the world, and various initiatives are being implemented in each region for the purpose of controlling the ever increasing road maintenance cost while ensuring the safety of the vehicles driving. Efforts for such initiatives have also been made in Asia,too,and initiatives for heavy-weight vehicles have recently gained momentumin Korea and Japan. We have developed a technology for unevenly installing bar-shaped sensors (piezoquartz sensors) to enable dynamic axle load measurement at a highly accurate level, and have estimated our measurement accuracy of axle load/gross weight, etc. on an actual road. The measurement accuracy of the axle load/gross weight varies significantly depending on the number of sensors installed. We have implemented our development with our target accuracy set to below ±5% for gross weight measurement so that automatic regulation can be applied, and have achieved our target by an 8-point measurement system. However, to have this technology widely accepted, it was necessary to reduce the system size to that of a common system. Therefore, we have estimated the relationship between the measurement accuracy and the system size (number of measurement points), and have come up with the proposal of 3-point measurement as an optimum number of measurement points, and have estimated its performance on an actual road. Additionally, we evaluate the relationship between the measurement accuracy and vehicle velocity.