When it comes to modern cities, I believe you will think of this word - heavy traffic, indeed, with the acceleration of China's urbanization process, road traffic construction is becoming more and more important, three-dimensional traffic Bridges are an indispensable part of the contemporary social traffic system.
The detection of vehicle height, vehicle type, driving lane and other information is very important for the traffic safety management of overpass. We still remember that on December 31, 2019, the railway bridge from Jiaozhou North to Gaomui in Shandong Province was hit by an over-limit truck, resulting in the deformation of the bridge, resulting in traffic interruption, causing a large range of trains delayed along the route, and some trains were canceled.
New Year's Eve train delays have a great impact on everyone's work and life:
Some were forced to cancel important meetings;
Someone can't make it to a party.
Some people can only eat instant noodles on the high-speed train New Year's Eve...
Fortunately, no train was passing at the time of the accident, otherwise the consequences would have been unimaginable.
It is reported that the accident is mainly caused by the cargo vehicle exceeding the limit height, so what technology does the traditional traffic management agency mainly adopt to measure the geometric parameters of the truck?
The answer is: the use of "steel tape measure, height ruler, Angle ruler, ground clearance instrument" and other manual measurement... It's complicated when you think about it!
This method of manual contact measurement has high labor intensity, long measurement time, low measurement accuracy and easy to appear errors, which can not meet the needs of modern traffic.
Therefore, it is necessary to design a detection-warning system that can automatically measure vehicle size information. At present, a modern traffic monitoring system based on LiDAR has become a research hotspot, with its main structure as follows:
Let's take a look at the detailed introduction of the automatic traffic monitoring system!
1. Vehicle height detection system
When the vehicle passes through the viaduct, the actual height of the vehicle is measured using the Lidar detector, with the vehicle size display screen and GPS communication module, the information is uploaded to the dispatch center, and the owner and the ground monitoring personnel are notified synchronously, which can greatly reduce the labor intensity and measurement errors of manual measurement.
2. Vehicle contour detection system
In front of various types of height limits, the Lidar profile detector is set up to monitor the shape and size of the passing vehicle in real time, with the display screen and GPS module, indicating the height, model and height limit of the vehicle, and upload the data to the dispatch center, and immediately send someone to deal with the illegal vehicle, or use the security interception system, and can also be combined with the monitoring system to take photos for archiving.
3. Mobile terminal navigation system
It can be a special navigation tablet or mobile phone, or a general APP, which can be used to show the owner's route in real time to avoid ultra-high vehicles passing through the height limit.
4. Scheduling platform
The platform can monitor the status of the limited high road section in the jurisdiction in real time, and if any illegal vehicles are found, the police can be dispatched to deal with it. At the same time, the dispatching platform is also responsible for uniformly arranging the route of ultra-high vehicles, real-time tracking whether ultra-high vehicles deviate from the planned path, and sending prompt messages or direct calls to the owners who deviate from the planned path.
After the system is completed, it will be the basis for judging whether the vehicle can drive normally on the road, and help to implement effective management of ultra-high vehicles. It can be widely used in the protection of high-speed rail Bridges above expressways, national highways, provincial highways, etc., and in the urban viaducts, culverts, tunnels and other sections with height limit requirements.
