What Are the Benefits of Installing a License Plate Recognition System in the Parking Lot?

1. Standard lens 5mm; The correlation between the linear distance (m) and the pixel (P) of the license plate is sorted as follows:

2. Standard lens 4mm; The correlation between the linear distance (m) and the pixel (P) of the license plate is sorted as follows:

Small license plate recognition (90-120 pixels), large license plate recognition (120-160 pixels). Full resolution capture of the on-site vehicle photo triggering the ground feeling, and the width of the license plate (the pixel size of the license plate can be displayed by framing the license plate through the drawing software).

The best straight-line distance: the straight-line distance from the lens of the camera to the outside of the ground sense is generally about 5m for 5mm lens and about 4m for 4mm lens

1. Erection height of all-in-one machine: generally 1.5m-1.8m;

2. Camera column: installed inside the gate, about 50cm away from the gate rod; Prevent the gate rod from blocking the camera capture, thus affecting the recognition effect;

Wiring: network line, power line, ground sensing switching value signal line (connected to vehicle inspection output terminal).

3. Ground sensing position at the entrance and exit: the length of the integrated machine occupies 0.5m, which is calculated according to the Pythagorean law (A2 B2 = C2):

1) The horizontal distance between the camera lens with 5mm lens and the brake rod shall be kept at about 4.3m. If the camera height exceeds 0.5m, it should be reduced by about 0.25m.

2) The horizontal distance between the camera lens with 4mm lens and the brake rod shall be kept at about 3.2m. If the height exceeds 0.5m, it should be reduced by about 0.25m.

4. Position of deceleration belt: it is installed at about 1m outside the ground feeling at the entrance and exit to ensure that the following car does not touch the ground feeling. In order to prevent the owner from following the car too close, a warm prompt board should be erected and kept 3 meters away.

5. Fill light: the column is 0.6m high and installed at 50cm-80cm on the inner side of the ground sensor (keep the fill light on the front of the license plate). It can be reflected on the license plate by shooting on the ground sensor coil to ensure the recognition effect of the license plate.

6. Monitoring picture (bottom inclination): try to keep the width of the license plate parallel to the horizontal, with a maximum of 15 degrees.

Therefore, the system requirements can lead to the requirements of the system for the on-site environment. In addition, according to the problems encountered in other projects, the following points are specifically summarized:

1. When the vehicle enters the image capture area, the vehicle is facing the camera, and the effect is the best.

2. The place where license plate recognition is installed shall have sufficient straight-line distance to facilitate installation and commissioning. This distance can be calculated as follows (vehicle length best recognition distance of camera).

3. Avoid installing license plate recognition system equipment after 90 turning.

4. Avoid installing license plate recognition system equipment on uphill and downhill.

5. The system shall be installed to avoid the chaotic environment on site (there are many pedestrians, and pedestrians often enter and leave the vehicle passage, which is easy to cover the license plate).

6. Avoid the channel with serious water and sewage on the road when it rains (it is easy to block the license plate).