What are the factors that determine the performance of the license plate recognition parking lot ?

The tigerwong license plate recognition parking lot system is welcomed by many people in life, but for the license plate recognition parking lot system, from which aspects should we judge its quality? As a leading enterprise in China's intelligent parking lot system solutions and products, Tiger Wong Technology will lead everyone to learn about some technical performance indicators of the license plate recognition parking lot system.

The license plate recognition parking lot system is the same as other parking systems. It should be considered from the aspects of the quality of the hardware product, the stability of the core performance, and the reliability of the system operation; secondly, the license plate recognition parking lot system is its own unique feature, Is the recognition rate and recognition speed of the license plate recognition system; again, it is the stability and compatibility of the license plate recognition management system software. These three elements together constitute the high-speed and efficient operation of license plate recognition.

The first thing we want to discuss is the hardware of license plate recognition products. Generally speaking, the hardware of license plate recognition products requires the imaging part, that is, the capture camera, the display part (display screen and control card), the light adjustment part (fill light), and then the parking barrier.

Generally, a camera used at entrances and exits of parking lots on the market needs to capture at a speed of 40km/h or less. With 2 million pixels, 25-35FPS/S is sufficient. It can accurately capture and output 1080P JPEG format vehicle pictures and perform Transmission and storage, and some cameras also support the transmission of lane information, vehicle color, license plate background color, and other additional information, which provides a large amount of information for the management and safety of parking lots.

The display part is generally configured according to the actual situation of the site, and some do not need to display the content to the car owner. The normal configuration can choose two-line scrolling red and green screen or four-line scrolling red and green screen, through the display control card To edit the command to define the character content that needs to be displayed. It should be noted that the power supply of the display screen needs to be able to work in a special environment, usually a 12V 5A power supply, and other voltages can also be selected under special circumstances. The fill light is standard for license plate recognition. Generally, the fill light is light-sensitive and will be lit according to the environment. If you encounter very poor light conditions such as underground garages, you can configure LED lights with more lamp beads. In addition, the quality of the barrier is determined by the motor and movement of the barrier. According to the performance of the control part, it is divided into Electromagnetically barrier, digital barrier, and smart barrier. The smart barrier has an LED display and voice broadcast functions.

According to the gate, it is divided into a fence gate, straight pole gate, curved arm pole gate

According to the landing speed, it is divided into fast barriers, medium speed barriers, and slow speed barriers

According to the installation direction, it is divided into the left barrier gate, right barrier gate.

How to choose the right barrier?

1. The barrier must be sturdy and durable. It is best to choose a cold-rolled steel shell with a thickness greater than or equal to 2 mm and a model greater than or equal to 45#.

2. Use the automobile metal spray paint process to spray to achieve the effects of anti-corrosion, waterproof and anti-rust.

3. The internal structure of the barrier is also made of anti-corrosion and anti-rust material, usually made of magnesium-aluminum alloy, to avoid rust and lead to scrap.

4. The barriers need to have advanced and mature intelligent anti-smashing functions, such as anti-smashing in case of resistance rebound, ground sense anti-smashing, opening priority anti-smashing, anti-smashing rubber strip anti-smashing and other anti-smashing functions to fully ensure the safety of the parking lot system. Effectively avoid the potential safety hazards of smashing cars and people.

5. Support the function of automatically raising the pole or manually raising the pole when the power is cut off. When the power is suddenly cut off, you can use the key to manually raise the brake pole to let the vehicle pass, so as to avoid the blockage of the parking lot system due to the power outage.

6. The gate chassis and gate poles are beautiful and fashionable. The gate poles are equipped with publicity signs and the chassis is equipped with LED lightboxes, which can enhance the image of the parking lot system.

7. The brake lever is equipped with flashing lights or a reflective effect, which can prevent the vehicle from hitting the brake lever because it is not clear at night.

8. The brake lever is made of aluminum alloy with the upper and lower soft plastic edges, which can prevent the vehicle from hitting and leave marks and can also reduce the load of the motor.

The license plate recognition parking lot system has become so popular in the past two years because with the development of technology, the recognition rate of license plate recognition is getting higher and higher. When the vehicle enters the parking lot, the license plate recognition system can quickly The license plate is recognized within time, and the barrier is lifted at the same time. The entire parking process can be completed in just a few seconds. How can we know the recognition rate of the license plate recognition parking lot system? To this end, we made a test to install the system in an actual environment and work uninterrupted 24 hours a day, while ensuring that the natural traffic flow per day is not less than 1000 so that we can calculate the recognition rate (natural Traffic flow = the total number of vehicles that are correctly identified by the full license/actually passed).

The license plate recognition parking lot system is not like other parking lot systems. If the recognition is wrong, the recognition is not recognized or the recognition is slow, it is easy for the barrier to not lift the bar or because the lifting speed is slow, the barrier is easy to be damaged Case.

The recognition rate of license plate recognition will be gradually trained with samples of the actual situation. The more special license plates that can be solved, the more accurate the algorithm will be.

Finally, the license plate recognition system is also related to the stability and compatibility of the system software. Currently, there is parking management software suitable for windows and Linux systems. The applicable database types are SQL Server, My SQL, etc., and the programming language is C#.C++, Java, etc. The stability of the system depends on the rigor and stability of its internal logic. The main functions realized by the parking lot management system include:

1. Check vacancies 2. Parking 3. System billing 3. Administrators check parking records 4. Find vehicle information.