The parking management system is mainly composed of the following three parts:
control center
The management and control center is composed of high-performance industrial control computers, printers, and parking lot system management software. The management and control center is responsible for processing the information collected by the inbound and outbound equipments, processing and processing the information, controlling the peripherals, and processing the information into the required requirements. Reports for use by management. The interface converters used in this part are generally 485 conversion cards, TCP/IP hubs, fiber converters, and parking lot card authorizers.
Entrance equipment
The imported equipment consists of image capture system, intelligent fill light, barrier gates, parking entrance and exit control machines, vehicle detectors, automatic card issuing system, and long-distance card reading equipment. It is mainly responsible for the automatic identification and identity of the internal vehicles entering the parking lot. Verification and automatic landing barriers; issue cards to outside vehicles, capture records into the time, vehicle information and automatic landing barriers. This part sometimes needs to install a car park management system parking spot display system, and some need to install a parking lot induction system!
Export equipment
The export equipment consists of an image capture system, smart fill light, barrier gates, parking entrance and exit controllers, vehicle detectors, long-distance card readers, and temporary metering devices. It is mainly responsible for the automatic identification of internal vehicles leaving the parking lot. , authentication and automatic landing barriers; billing for external vehicles, automatically pick up barriers after charges.
working principle
When a fixed-card user's vehicle enters the parking lot, the entrance control device actively detects the entry of the vehicle and detects whether the card is valid. If valid, the barrier will open and the vehicle will be able to enter the parking lot. The camera will take a picture of the vehicle and store it on the management computer. When the vehicle leaves the parking lot, the exit control machine automatically detects the arrival of the vehicle and determines the validity of the card held. If valid, the barrier opens and triggers the exit camera to capture the vehicle so that the vehicle can leave the parking lot.
When the vehicle of the temporary card user enters the parking lot, a temporary card is obtained from the entrance control machine, the entrance camera captures a photograph of the vehicle, and is stored in the computer, and the controller records the time when the vehicle enters and is transmitted to the computer when connected. When leaving the parking lot, the entrance control function detects that it is a temporary card, prompting the driver to pay a fee. The temporary vehicle must return the temporary card to the security and must pay a certain fee. After the security confirmation, it can leave.
Having said the principle, let's talk about construction. According to the sequence, it can be divided into the following steps:
Determine the position of barriers and card readers
1. When determining the position of gates and card reading equipment, the width of the lane should be ensured first, so that the vehicle can enter and exit smoothly. The width of the lane is generally not less than 3 meters, and the width is about 4.5 meters.
2. The distance from the reader to the gate is generally 3.5 meters, and it is not less than 2.5 meters in the most recent time. It is mainly to prevent the front from touching the rail when reading the card.
3. For underground parking, reading equipment should be placed on a relatively level ground, otherwise it would be more troublesome for the vehicle to stop parking when going uphill or downhill.
4. For the underground parking lot, if there is a barrier above the barrier, you need to use a folding barrier. The height of the barrier is -1.2 meters, which is the position of the folding point.
5. The position of the gate gate and card reader equipment is directly related to the user's convenience. Once the position is determined to be in place, it will cause great trouble for the construction. Therefore, the project is in this respect. Experience is not a lot of engineering personnel, the first gate and card reader equipment installed in place, and then simulate the user, together with the staff to see if the positioning is appropriate, and then lay the pipeline.
Determine the location of the automatic ejector
In the parking lot where there is a temporary vehicle access, if a long-distance card reading device is selected and an automatic card ejector is selected at the same time, the automatic card ejection device is an independent body and is installed approximately 0.3 meters away from the card reading device in front of the card reading device. . If an ordinary card reading device is selected and an automatic card ejector is selected at the same time, the automatic card ejector and the card reader are installed in the same device, and the on-site construction does not need to consider this step.
Determine the camera installation location
The angle of view of the entrance and exit cameras is mainly for the location of the license plate when the vehicle enters and exits the card. Generally, the automatic iris lens is selected, and the installation height is generally 0.5-2 meters. If you do not select the image comparison function, you do not need to consider this item.
Determine the location of the booth
For parking lots with temporary vehicles, post boxes are generally placed at the exits, so that due to the need to place control consoles and other equipment within the toll booths, and at the same time, it is a work place for on-duty personnel. Therefore, there is a certain requirement for the size of the post office, and it is best not to Less than 4 square meters.
Determine the location of the control host
The control host is the core control unit of the entire parking lot system. If a parking lot is located near the entrance to the parking lot, it will be placed in the post office; if there is no post office, it will be placed in the central control room. However, the distance between the control host and the card reader is generally not more than 200 meters.
Parking system design parameters
1. Card reader (center distance) and barrier (center distance)> 2.5M;
2. The distance from the management computer (usually placed in the parking lot management booth) to the reader is <100M;
3 camera installation height: 2 - 2.5M;
4 sense coil size: 2M (long) X0.8M (width);
5. Minimum charge management booth area: 4 square meters (2M*2M);
6. In and out lane width: >3M;
7. Equipment installation base size: 0.4M (long) * 0.4M (wide);
Pipeline laying
The laying of pipelines is relatively simple. Before laying the pipelines, the signal properties, signal flow and power supply of each equipment are clarified against the schematics of the parking lot system and the pipeline diagram. The signal line and the power line should be worn separately. For the power line, lines with different voltage levels and different current levels cannot wear the same tube.
Wire model
1. Communication line (management computer to the entrance and exit machine): RVVP6*0.3mm;
2. Control line (inlet and exit gates): RVVP6*0.3mm;
3. Video cable (access camera to management computer): 75-5 coaxial cable;
4. The sense of the line: high temperature corrosion resistance single stranded multi-core 1.5mm2 wire wound 6 circles, buried depth 3cm - 5cm;
5. Power cord: (power supply to card reader, barrier, camera) RVV3*2.5mm;
Control machine and barrier installation
Cast a 10-20cm high-precision waterproof and crashworthy island (mounting base), and pre-lay pipelines in the middle of the entrance and exit gates. Use four expansion bolts to secure the entrance and exit gates to the islands.
Placement of geomagnetic coils
The embedding of the geomagnetic coils is performed at the same time as the paving of the exit and entrance lanes or paving of the road surface. When the road surface is paved or is being paved, a slot is placed on the lane adjacent to the entrance and exit of the entrance and exit gates (coils). Put in the cut slot, the slot width is 1.5CM), the size of the ground coil is 200CM (length) X80CM (width) X5CM (deep). The ground sense line is wound 5-6 times along the slot, and the two terminals of the coil are introduced into the cabinet of the entrance machine and the gate, and the slot is filled with cement or asphalt.
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