Installation Method and Precautions of License Plate Recognition Parking Lot System - Tigerwong

Installation method and precautions of license plate recognition parking lot system; 4. During outdoor wiring, the line shall be protected by JDG galvanized iron pipe. Buried lines shall be laid through PVC pipes, and indoor wiring shall also be maintained and fixed through PVC pipes. 1 It is widely used. Based on digital image processing, pattern recognition, computer vision and other technologies, license plate recognition system refers to the technology that can detect vehicles on the monitored road and automatically extract vehicle license plate information (including Chinese characters, English letters, Arabic numerals and license plate color) for disposal. License plate recognition is one of the important parts of modern intelligent transportation system. Analyze the vehicle image or video sequence captured by the camera to obtain the unique license plate number of each vehicle, so as to complete the recognition process. Measurement of traffic flow control indicators can realize parking lot charge management through some subsequent disposal means.

Vehicle positioning, automobile anti-theft, automatic supervision of Expressway speeding, electronic police running red lights, highway toll stations and so on. It has practical significance for maintaining traffic safety and urban public security, preventing traffic congestion and realizing traffic automation management. 2 Automatic license plate recognition technology can realize the automatic registration and verification of vehicle "identity" without any change. The vehicle license plate number is the only "identity" identification of the vehicle. This technology has been applied to various occasions, such as highway toll collection, parking management, weighing system, traffic guidance, traffic law enforcement, highway inspection, vehicle scheduling, vehicle detection and so on. The installation process and precautions of license plate recognition system greatly affect the working performance of the whole license plate recognition system.

A complete set of license plate recognition system includes license plate recognition all-in-one machine, parking lot toll display screen, intelligent gate, license plate recognition software, etc. Whether the devices of these equipment are standardized. A detailed survey shall be conducted on the project site, and the license plate recognition equipment shall be installed before the installation. To understand the customer's needs and formulate a perfect construction process, what factors should be emphasized in the field investigation and device process? 1. The device of the main equipment of license plate recognition, which will directly affect the effect of license plate recognition. 1 first, determine the device position of the integrated license plate recognition machine. It needs to be determined according to the site environment and conditions of each entrance and exit. Generally, one camera is installed in one lane.

If the direction is not fixed when the vehicle enters the lane, the identification will be affected if the angle is too large. It is necessary to consider installing an auxiliary camera to ensure that the front of the vehicle can be identified no matter which side it is biased. Then it is necessary to determine the device position of the camera and coil: the best distance between the camera and the side of the incoming direction of the coil is 4-4.5m. The position of the coil shall ensure that the front direction of the vehicle is biased to the side of the camera as far as possible when the vehicle triggers the vehicle detector. 2 secondly, if capture identification is used. This allows the camera to take clear and complete pictures. If it is a single channel (the entrance and exit are in the same lane), a two-way vehicle detector needs to be used.

There is no need to install ground induction coil and vehicle detector. If video recognition mode is used. The device is located behind the camera (30cm away from the camera pole, 3 and then determine the position of the barrier gate and anti smashing coil: the barrier gate is generally installed on the same side of the camera. Ensure that the barrier gate can be opened conveniently). The anti smashing coil is located in the middle right below the barrier bar. It is necessary to ensure that no part of the vehicle body is below the barrier bar when the front triggers the coil and when the rear leaves the coil.

If the ground is brick or asphalt, 4 cameras and gates shall be installed on solid ground. It is necessary to consider pouring cement piers on broken pavement to increase stability. Before the installation of the above equipment, the wiring mode of the line shall be determined, and the threading pipe shall be reserved in advance according to the position of the equipment. In order to ensure that the recognition effect will not be affected by the vehicle speed, it is recommended to control the vehicle speed with a deceleration belt. 2 license plate recognition auxiliary equipment is used for charging. 1. Configure computer and server: the computer is generally placed in the entrance guard box or duty room. Optical fiber shall be laid from the sentry box to the server, and the server shall be placed in the customer's office or sentry box according to the customer's needs.

If it's in the office. When investigating the site, the distance from the optical fiber to the nearest sentry box shall be estimated and allowance shall be made. If the client does not need to set up the server separately, the sentry box machine is used as the server, device database and FTP service. Gigabit 8-port or 5-port switches are generally selected. The switch should be placed in the guard box or distribution box nearby. 2. The switch shall be selected according to the number of devices to be networked.Ping an island is generally poured with concrete. The size of Ping'an island shall ensure that there is sufficient installation space for equipment such as sentry box or road gate. 3. Make Ping'an island and sentry box: set Ping'an Island according to needs and site conditions. And it will not affect the passing of vehicles. The threading pipe shall be embedded during the pouring of Ping'an island. After the completion of Ping An Island, you can brush paint to increase the eye-catching effect.

For the convenience of charging, the sentry box is generally installed at the entrance of the parking lot. The size shall be determined according to the size of Ping'an island or the location of the device, but it must be ensured that there is enough space in the post box to accommodate computers and other equipment and the work of toll collectors. You can choose the device installed on Ping'an island or placed in the sentry box, duty room and 4 distribution box. If it is placed outdoors, it shall be rain proof and grounded. 3. The license plate recognition construction data integrated box, integrated machine and road gate shall be grounded. The air switch for bus power supply shall be selected according to the total power of all equipment.

The power supply bus of 1 equipment shall use no less than rvv3 * 1.5 cables. Prevent overload tripping. Use category 6 network cable. When the transmission distance is greater than 100m, 2 when transmitting network data. The optical fiber needs to be laid. Generally, single-mode optical fiber is used. At least 2 cores shall be reserved for standby at each optical fiber access point on site.The total number of cores shall be determined according to the access points and the number of fusion cores at each access point. When transmitting 485 signals, shielded cables shall be used. When threading, strong and weak current lines must be separated. Each pair of transceivers uses 2-core optical fibers. The specific model and quantity can be determined according to the needs of customers or projects. 3. Gigabit single-mode dual fiber type can be selected for optical fiber transceiver.