Parking lot system-license plate recognition-safe island installation and construction scheme
Safety island is not only the foundation of fixing equipment, but also plays the role of protecting equipment. Safety islands are usually made of concrete. Determine the size of the safety island according to the actual situation of the site and the installation position of the equipment. Let's give a few examples to illustrate how to make a safe island: 1) One-in-one-out charging equipment is put together with a charging booth in the middle. We can make the safety island a cuboid with a length of 5.5 meters, a width of 1.3 meters and a height of 0.15 meters. For the sake of aesthetics, we can make the two ends of the island arc-shaped, as shown in the figure: 2) Before watering the safe island, the pipeline should be embedded. Embedded pipe shall be galvanized pipe or PVC pipe according to wiring requirements. 3) Single-entry safety island: We can make the safety island a cuboid with a length of 4.3, a width of 0.5-0.6 meters and a height of 0.15 meters, and its two ends can be made into arcs. Sometimes, in order to save time and cost, the safety island can be made into three cuboids of 60*60 *15CM. As shown in the figure: 4) The safety island on the slope: the safety island on the slope should be made into several steps, and the place where the equipment is placed should be made into 60*60 steps, but the upper surface of the safety island must be horizontal. If there is a guard post, the place where the guard post is installed should be made horizontal. Second, the ground wire installation When the ground wire is embedded, the ground wire can be buried under the safety island. Buried parts must be buried in the soil, so as to ensure good grounding. They can be φ 20 round steel or 40mm*40mm angle steel, and 4.0 square iron wires are used for lead wires. The resistance value of ground wire shall not be greater than 4ω, which can be measured by ground wire shaking meter (ground resistance meter). III. Equipment installation 10.1 installation steps 1. Determine the installation location, and mark the installation holes of the equipment on the installation foundation (safety island); 2. According to the size of the installation hole of the equipment, select the appropriate impact bit; 3. Punch holes at the marked positions; 4. Drive the bursting screw into the hole and tighten it so as not to shake, and then remove the nut and gasket; 5. Place the equipment and align the mounting screws; 6. Put the gasket and tighten the nut. 10.2 Installation of standard installation equipment must be uniform, and it is required to mark the alignment edges of the installation equipment with Mo Dou elastic wires during installation. When installing the equipment, it is required that each outer edge line be aligned with Mo Dou elastic wires! As shown in Figure 3.13 and Figure 3.14: The installation equipment must be horizontal, and the expansion screws must be installed in place. After the installation of the gate, the main requirements of the gate are the same as above. After the installation, the bar of the gate must be horizontal. The installation of the camera is generally that the height of the spotlight is 1.5 meters, and the installation height of the camera is 50cm, under special circumstances, such as backlighting, the camera lens should be avoided from facing the sun as far as possible, and it should be installed at a certain angle away from the sunlight. IV. Equipment wiring There are four main connection modes between the device and the device, namely power supply, communication, voice and video. 11.1 power connection All the independent devices in the parking lot need power supply, and most of them use mains AC 220V, as long as the mains is connected to the corresponding power input. Generally, cameras use DC 12V or AC 24V power supply, and some cameras also use AC 220V power supply, which only needs to be connected to the market. Electricity will do. For non-mains power supply equipment, we will provide corresponding transformers, which can be directly plugged into mains socket. The ground wire of power supply in all kinds of chassis must be connected to the ground wire terminal. If there is no ground wire terminal, it can be connected to the shell. At one end of the booth, the ground wire Be sure to connect to the ground terminal of the power control box, and the ground terminal is also connected to the ground lead-in line. 1.2 communication wiring The communication methods used in the parking lot management system are mainly 485 and TCP-IP communication methods. This only needs to pull a network cable into the equipment, and it needs to pull optical fiber if it is more than 80 meters. Communication connection between entrance control machine and booth computer Adopt TCP-IP communication mode. Wiring in the gate box Connect the manual control line of the gate to the lifting and falling of the gate according to the colors of yellow, green, white and black respectively. And ground stop terminal; The control lines from the entrance control machine are merged according to the colors of yellow and black respectively. Lift and ground terminals connected to the Road gate; Just connect the power cord to the power input. See the equipment for details. Introduce. (Note: the connecting shielding layer of the gate must be grounded. ) Internal wiring of export control machine The communication mode between the export controller and other equipment is the same as that of the import controller. Booth equipment connection 1) power wiring The power lead-in line of the guard post shall not be less than 1.5 square meters, if there is air conditioning or other electricity. Equipment power lead-in line shall not be less than 4.0 square meters. The whole system uses two kinds of power supply: ordinary power supply. Computer, entrance controller, exit controller, 2) Data line connection Connect all kinds of data cables according to their communication mode and plug them into the corresponding network port of the computer. V. Network wiring For the convenience of management, the parking lot management system can form a network mode. 12.1 One-in one-out networking One-in-one-out device network mode is to separate charging and management. Just manage Connect the computer and the toll computer with a network cable. The connection distance of the network cable is 100 meters, Relay should be used when the distance exceeds 100 meters. If relay cannot be used for outdoor wiring, it should be built. When it comes to optical fiber, it is necessary to use optical fiber when it exceeds 150 meters. Communication with the computer using It is TCP/IP protocol. Do a good job in the connector and connect it to the corresponding network port. Connect the connector. Method: 1 orange white, 2 orange, 3 green white, 4 blue, 5 blue white, 6 green, 7 brown white, 8 brown. 12.2 Multi-input multi-output networking In and out of the parking lot, in order to facilitate vehicles to enter from one entrance and exit from another, several parking lots can be used. The equipment at the entrance and exit forms a network mode to realize data sharing. VI. Classification of Lines The parking lot management system has five lines: power line, control line and communication line. 1, the line standard For each purpose of the line, we have made strict regulations on the specifications used, specifically As follows: Power cord: We use Rvv3*1.0/32 sheath line as the power cord of all equipment, and the distance is relatively short. When it is far away (when it is more than 300 meters), the sheath line of Rvv3*1.5/32 is used to reach the main power supply of the sentry box. If there is air conditioning, a three-core sheath line of more than 4 square meters should be used, and if there is no air conditioning, 2.5 square meters should be used. The above three-core sheath line. Control line: the control line adopts Rvvp6*0.3 6-core shielded wire; Communication line: When TCP/IP protocol is used for communication, the general distance is less than 100 meters, and the super-category-5 line is used. Exceed distance 100 meters and less than 200 meters, when the relay can be used (generally in the basement), can be Use Category 5 cable. When relay is not available, use optical fiber (four-core multimode); General situation, We recommend customers to use optical fiber, which is stable on the one hand, and inexpensive on the other. Less. 2. Classification of pipes There are two kinds of line pipes: PVC material and galvanized iron pipe. The size of the pipe can be according to the number of threading. To choose various models. Such as φ 25/φ 20/φ 32, etc. In general, we recommend adopting Galvanized iron pipe. 3. Requirements for pipe laying Walking tube The principle of walking is to try to walk the straight distance between two points, the wall near the corner or the sky. Flower board Technical requirements: (1) All line pipes must be in a straight line when running pipes. Before running pipes, Mo Dou must be used to install the line pipes. Play line. (2), the positioning spacing of wire pipe code must be less than 1.5 meters for iron pipes and less than 1.2 meters for PVC pipes. (3), line pipe every 10 meters need to install junction box (no more than 20 meters at most to ensure the threading party. ). (4) When PVC pipes are used for power lines, the pipe spacing with signal lines is not less than 15CM, and iron pipes are used. The time distance can be reduced to 10CM. (5) When the line pipe is buried underground, the distance between the cement pavement and the ground shall not be less than 20CM, and the distance between the flower beds. No less than 50CM； from the ground; (6) When it is necessary to bury pipes underground, iron pipes must be used for line pipes. (7), pipe bend radius should be greater than 10CM. (8) In order to ensure the convenience of threading, it is best not to use elbows at corners, but to use pipe benders. Tube. 4. Threading Any wire should be routed through the tube, and the power cord and other wires should be routed through the tube separately. technical requirement (1) It is best not to connect the communication lines in the middle, except in special cases (if greater than 300 meters) and the junction box should be installed at the joint and clearly marked. (2) All wires must be laid in place with sufficient length (1.5m-2.0m) reserved. (3), all traces must be clearly identified, marked in Chinese, and ensure continuity; (4) UPS power supply for entrance and exit controllers, card readers and cameras, Road gates and spotlights. Turn on the power. (5), cameras, spotlights should leave 3 meters when installing the ground support, which should be installed on the roof Set aside 1 meter for installation. The spotlight control switch should be installed at a convenient location. (6) Don't wear too much thread in each tube, and generally leave 40% space. (7), for the entrance equipment installation location is far away (entrance and exit are not together), the equipment is shared. For example, the power cord can be added near the entrance by bus. Install the distribution box, through which the power supply of each equipment is transferred, and the electricity consumption of the entrance equipment is divided. Two, one for the mains, the road brake and the spotlights, so that we can take two power lines. One is mains and the other is UPS. Other similar situations and so on. 5. School line The contents of the school line are: 1, check whether the line is clear; 2. Check whether the line-to-line insulation and ground insulation of the line are up to standard. Alignment method: 1, check whether the line is clear, use multimeter, resistance method. Measure; 2. Check the line-to-line insulation and ground insulation, and use megohmmeter. Line-to-line insulation is unique. The edge shall not be less than 200 megohm, and the insulation to the ground shall not be less than 5 megohm. Special instructions: When the system is connected to the network with twisted-pair cable, in order to reduce the interference of other devices on its path, The distance between it and other equipment on the path shall meet the following requirements: device category Minimum parallel spacing (mm) No isolated power cord or One hundred and fifty Power equipment Transformer or motor eight hundred fluorescent light Three hundred Lightning protection downlead One thousand Protective ground wire Fifty Heat pipe (enclosed/not enclosed 300/500 Seal) gas pipe Three hundred VII. Introduction of communication mode of the system The parking lot management system mainly uses the following communication methods: RS-422: The theoretical communication distance is 1200m. Used for communication between computer and controller, and between computer and counter. RS-485: It is used in the way of card transfer from underground garage, and the communication distance is 1200m. TCP/IP protocol: We adopt the standard TCP/IP protocol in the network mode of computers, and we also use this communication method in embedded systems. Without a relay, the communication distance is 100m.
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