1 First, determine the installation location of the license plate recognition machine, which will directly affect the license plate recognition effect. It needs to be decided according to the site environment and the conditions of each entrance and exit. Generally, a camera is installed in one lane. If the direction of the car is not fixed when it enters the lane, the recognition will be affected if the angle is too large. Therefore, it is necessary to consider installing a sub-camera to ensure that the front of the car can be identified no matter which side it is biased.
2. Secondly, if snapshot recognition is used, it is necessary to determine the installation position of the camera and the coil: the best distance between the camera and the coil in the direction of the car is 4-4.5m. The position of the coil should ensure that when the vehicle triggers the vehicle detector, the direction in front of the vehicle is biased towards the camera as far as possible, so that the camera can take a clear and complete picture. If it is a single lane (the entrance and exit are in the same lane), you need to use a two-way vehicle detector.
3. Then determine the position of the gate and the anti-smashing coil: the gate is generally installed on the same side of the camera, behind the camera (installed 30cm away from the camera upright to ensure that the gate can be easily opened). The position of the anti-smashing coil is centered under the brake lever to ensure that no part of the car body is under the brake lever when the front trigger coil and the rear leave the coil.
4. Cameras and road gates should be installed on solid ground. If the ground is brick or asphalt, cement piers should be poured on the broken road surface to increase stability. Before the installation of the above equipment, it is necessary to determine the route mode of the line and reserve the threading pipe in advance according to the installation position of the equipment. In order to ensure that the recognition effect will not be affected by the vehicle speed, it is suggested to install a speed bump to control the vehicle speed.
License plate number arrangement rules:
The number of characters of the motor vehicle registration agency code is 2, which consists of Chinese characters and English letters respectively. Chinese characters are abbreviations of provinces, autonomous regions and municipalities directly under the central government, and English letters are the code names of vehicle management offices.
The motor vehicle registration agency code of the license plate number is located in the middle above the license plate, and Chinese characters and English letters are arranged horizontally; The motor vehicle registration agency code of motorcycle license plate number is located on the left side of the license plate, and Chinese characters and English letters are arranged vertically.
The number plate number has 5 digits, consisting of Arabic numerals or Arabic numerals and English letters. Arabic numerals range from 0 to 9*** 10, and English letters range from a to Z***26.