Overview of high-speed pre inspection weighing system: high-speed and low-speed combined with dynamic weighing system is a widely used detection mode to control over limit and overload in the world. In the system, the dcs-h high-speed pre inspection and weighing system is used to pre detect the weight of cargo vehicles running normally on the carriageway. If a vehicle exceeds the load limit set by the system, the detection data, vehicle image and recognized vehicle license plate number of the vehicle are transmitted to the ahead law enforcement station for the treatment of over limit and overload. At the same time, The portal frame in front of the vehicle is equipped with a variable information board to display the license plate number and warning information of illegal vehicles, cooperate with the roadside traffic signs to guide illegal vehicles into the front law enforcement station, and accurately weigh them through the low-speed dynamic weighing system as the basis for law enforcement; However, through the pre detection of dcs-h high-speed pre inspection system, the vehicles loaded in accordance with the regulations will run normally without law enforcement. More and more practical applications at home and abroad have proved that the high-speed and low-speed combined with the dynamic weighing system is a good solution to deal with over limit and overload on high-grade highways with large traffic flow, many lanes and fast speed. It has the characteristics of high detection efficiency and strong detection pertinence, which not only reduces the detection pressure of low-speed weighing in the law enforcement station, It also ensures that road traffic will not be congested due to law enforcement detection.