Parking lot < ahref=“ http://www.fuyingkeji.com/ "> engineering requirements of license plate recognition system < / a >

1. Erection height of all-in-one machine: the general standard is 1.5m-1.8m

2. Camera column: installed on the inner side of the gate, about 50cm away from the gate rod; Prevent the brake 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 should 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 should be kept at about 3.2m. If the height exceeds 0.5m, it should be reduced by about 0.25m

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

5. Fill light: the height of the column is 0.6m. It is 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 screen (bottom inclination): try to keep the width of the license plate parallel to the horizontal, with a maximum of 15 degrees