Vehicle overload monitoring method based on gravity anomaly

Abstract

The invention discloses a vehicle overload monitoring method based on gravity anomalies. Several measurement positions are set on a single lane, a gravity measuring instrument is arranged to obtain the gravity anomaly value caused by the middle position in the vehicle length direction reaching each measurement position, and the monitoring camera is used to identify Vehicle category, obtain the three geometric dimensions of the vehicle's length, width, and height, and determine the vehicle's position. The vehicle is simplified into a cuboid according to the length, width and height of the vehicle, and the mass density distribution is simplified into a step distribution along the length direction of the vehicle. The value of the step distribution is calculated according to the gravity anomalies caused by the vehicle at each measurement position, and the actual value of the vehicle is calculated according to the mass density distribution. The load is compared with the vehicle weight limit to determine whether it is overloaded. The overload monitoring method performs non-contact monitoring of vehicle load conditions based on gravity anomalies, and the monitoring results are not limited by road surface structure and vehicle driving conditions, and the monitoring process does not affect the normal operation of road traffic.

Description

technical field [0001] The invention relates to the field of vehicle overload monitoring, in particular to a vehicle overload monitoring method based on abnormal gravity. Background technique [0002] my country is in a period of rapid development of infrastructure construction, and road transportation facilities are becoming more and more perfect. However, due to factors such as the quality of drivers, road safety factors, and load restrictions on special structures such as bridges, the problem of road traffic safety is still severe. Among them, the problem of traffic overload is particularly serious. Overload monitoring is still in a low-density "spot check" state. The main monitoring methods can be divided into dynamic weighing and static weighing according to whether parking and weighing are required. [0003] Dynamic weighing needs to implant the equipment into the road pavement, which is not suitable for bridge structures with thin pavement. At the same time, the jun...

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Problems solved by technology

[0003] Dynamic weighing needs to implant the equipment into the road pavement, which is not suitable for bridge structures with thin pavement. At the same time, the junction between the implanted monitoring equipment and the road pavement is prone to uneven deformation due to the difference in material stiffness. Not only affects the smoothness of the road surface, but also makes the monitoring equipment more easily damaged and reduces the service life of the monitoring equipment

In addition, dynamic weighing depends on the interaction between the vehicle and the device. Therefore, the weighing result is easily affected by the smoothness of the road surface and the driving state of the vehicle. The impact load caused by the uneven road surface and the acceleration and deceleration process of the vehicle will cause Uncertainty in its weighing results

[0004] Static weighing used by toll stations is only applicable to entrances and exits with expressways due to the need to stop and weigh. For roads with dense traffic in cities, parking and weighing will seriously affect the normal operation of traffic

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