Application of low-power radar module for vehicle height limit application at intersection of toll station,In order to achieve accurate toll collection and solve the problem of toll evasion in high-speed automatic toll collection, it is necessary to accurately classify the models of the ETC toll lanes, so as to implement different toll standards for specific models, improve the toll collection efficiency, and reduce the congestion of toll stations. In order to realize the function of model classification, you can use the camera to take pictures and stitch them together through the background algorithm, but it is difficult to identify the front and rear algorithms. By combining the low-power radar module to detect the vehicle and the ground in real time, it can effectively provide accurate cutting information for the camera. According to the change of the radar ranging value, the front and rear vehicles can be effectively distinguished, which greatly improves the accuracy of vehicle identification and classification, and increases the toll collection rate. Efficiency and solve the toll evasion problem of some vehicles.
Installation method: Install 2-3 low-power radar modules on the intersection side of the toll station, and detect the designated area diagonally downward. The installation height can be set at 1.3-1.5m, and the horizontal direction is 2m from the middle of the road. In order to cover the range of 36*36cm in the middle of the road, the oblique downward detection angle a is about 35°.
Program advantages:
1. The module is small, the detection is accurate, and the false alarm rate is low.
2. Easy to install, reduce construction difficulty and construction cost.
3. Low-power radar module solution, high cost performance and low product cost.
Low-power radar module vehicle height limit application, in order to ensure road safety, the Ministry of Communications has made detailed regulations on the height and width of transport vehicles in the "Regulations on the Administration of Highways for Over-Limited Transport Vehicles". However, there are still a few operating companies or vehicle owners who ignore safety for profit and carry too much cargo on transport vehicles, resulting in over-high or over-wide. In order to monitor and manage such illegally operating vehicles, traffic authorities usually use height limit bars to inspect transport vehicles. The traditional height limit rod is easy to scratch the vehicle and cause an accident. Low-power radar modules are versatile. The characteristic of stable performance is the best choice for the height limit pole upgrade scheme.
Install the low-power radar module on the road height limit pole (usually a viaduct, tunnel, etc. in front) and detect the side horizontally. If the passing vehicle exceeds the limit height (such as 2.5m), it will detect that the distance is shortened, indicating that it is super high, the alarm light will flash, trigger the camera to take a picture, and it is recommended to broadcast back. When the camera detects special vehicles such as ambulances and buses over 2.8m, it will automatically raise the limited viaduct to a suitable height.
Program advantages:
Low-power radar module technology: high precision, stable performance, anti-glare, built-in algorithm, detection frequency up to 24GHz, can be adjusted freely, and can cover the application scenarios of low-speed and high-speed vehicles.
Implementation: Small size, easy to integrate, external fixed pile, easy to install and deploy, support 232.485.CAN.4-20ma.I/O.UART and other interfaces.
Install the North Wake single-point lidar at the vertical limit height position on one side of the height limit bar, and perform horizontal detection to replace the traditional metal cross bar on the left side of the picture above. When the vehicle passes, the radar measurement data changes, and the background system triggers an alarm according to the data change.
Product advantages:
1. Invisible detection to avoid scratching.
2. High precision, high frequency, no omission.
3. A variety of interfaces, plug and play, easy to integrate.
