
Reasons why the automatic gate cannot recognize the license plate: 1. Loose wiring terminals: If all vehicles are not opening the gate after recognition, staff should check whether the wiring terminals are loose and whether there is signal output. They should also inspect the control board of the gate machine to determine if the gate has crashed. If it has crashed, turning off the power and restarting it may resolve the issue. 2. Weather and environmental factors: When the license plate recognition camera is used outdoors, excessive light can cause reflection on the license plate, reducing the recognition rate. Additionally, insufficient lighting at night requires auxiliary lighting. Moreover, during heavy rain or snow, the license plate recognition rate may slightly decrease compared to normal conditions. 3. Vehicle distance and speed: Vehicles must enter one at a time, and tailgating is prohibited, as the camera system may fail to recognize the license plate otherwise. The vehicle speed should be less than or equal to 20 km/h when entering or exiting, which can effectively improve the operation efficiency of the license plate recognition system.

I've encountered this situation several times before, and there are quite a few reasons. Mainly, it's issues with the license plate itself, such as mud, dust, or excessive wear making it unreadable by the camera. There's also the impact of lighting conditions—too much glare during the day or insufficient light at night can cause the system to make incorrect guesses. Additionally, if the vehicle isn't parked correctly, even a slight misalignment can prevent the camera from accurately capturing the license plate position. Occasionally, there might be a software bug in the barrier system, possibly due to an update error or unsynchronized backend data. The solution is to first clean the license plate yourself and see if that helps. If not, ask the administrator to restart the system or try a different entrance. It's advisable to check the cleanliness of your license plate before driving to avoid delays.

I can relate to this. Last year, I was stuck in a supermarket parking lot for a long time, and it turned out the camera was misaligned. It was only resolved after the staff adjusted it. License plate recognition failures can also occur if the plate number has been altered or if it's a fake plate, causing a mismatch in the system. Poor or excessive lighting is another common issue, especially on cloudy or rainy days when errors frequently happen. Additionally, the barrier's sensors can malfunction when temperatures are too high, which is particularly noticeable in summer. If you encounter such a situation, don’t panic. First, check if your license plate is clean and try adjusting your parking angle. If that doesn’t work, press the emergency button or contact the property management. Remember, avoid modifying your license plate or applying films, as these can affect recognition accuracy.

I feel that most cases where the automatic barrier fails to recognize license plates are minor issues, such as mud or grease on the plate obscuring the camera's view; another common reason is parking too far away or at an incorrect angle. Additionally, weather conditions like rain or fog can affect visibility. The solution is simple: first, clean the license plate, then back up and try again; if it still doesn't work, wait for assistance.


