Intelligent parking lot management system
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The traditional parking management system focuses on the billing and charging management functions. It pays attention to the time of entry and exit of each vehicle to facilitate charging, and considers the safety of the parking lot, the operational efficiency and the humanized requirements for customers. less. In view of the current situation, the author proposed an intelligent parking lot management system to realize automatic vehicle identification and information management, improve vehicle traffic efficiency and safety, and count vehicle access data to facilitate management personnel to dispatch to reduce the labor of management personnel. Strength, which increases work efficiency.
The parking lot management system not only retains all the functions of the traditional parking lot management system, but also relies on the original charging medium to improve the management medium. When the vehicle enters the parking lot, the system automatically takes in the image of the vehicle, and after processing the computer, obtains the vehicle model, license plate, and color information, and stores the information in the database together with the unique correspondence of the user card. When the vehicle leaves the parking lot, the relevant indicators such as the user card, license plate number or vehicle image can be released before being released.
The system adopts the management mode of “one car, one card and one cardâ€, that is, from the vehicle entering the parking lot until the vehicle leaves the parking lot, all the data related to the car is uniquely related to the ID number of the card, and the unique ID is passed. No., we can unify information such as user, vehicle model, vehicle license plate, vehicle color and vehicle image, vehicle entry and exit time, parking time, designated parking space number, parking route, payable fees, etc. in the database. Easy to query and store. In this way, the data information of the charge management, parking guidance and vehicle identification safety monitoring subsystem is built on the same data platform, thereby effectively integrating the subsystems into a unified intelligent parking lot management system.
The intelligent parking lot management system is a computer network composed of a management system and a channel identification system, and the network communication protocol adopts a TCP/IP protocol. The system can effectively, accurately and intelligently identify, collect, record and park data on system vehicles (vehicles with electronic license plates) entering and leaving the parking lot and non-system vehicles (veans without electronic license plates). Upload, process, and supplement with manual intervention if necessary to avoid the impact of abnormal events (non-system car access) and ensure that the system has efficient vehicle intelligent release capability.
For the intelligent parking system, the sensitivity should be high, the adaptability is large, the installation is not too complicated, and it should be free from day and night to ensure stable and reliable monitoring of the vehicle in any environment. Maintenance free and cost should not be high. The radio frequency identification equipment should be able to communicate with the electronic vehicle card when the normal speed of the vehicle passes. The time, space information, vehicle card information and data processing center transmission instructions of the vehicle must be saved locally; the system should be self-tested and faulted periodically. Check and upload the working status of the equipment in time for the system operation center to handle; after troubleshooting or power restoration, the system automatically restarts to ensure the parking lot works normally and the data transmission is complete; the software structure is modular; the device can be fully controlled and monitored. (such as gates, signal lights, electronic scales, video capture, etc.) interface requirements.
The performance characteristics of the intelligent parking system are as follows:
(1) It adopts radio frequency identification technology and computer control, with high degree of automation and accurate control.
(2) Adopting long-distance intelligent identification label technology, the anti-counterfeiting performance is good. The parked vehicle has a label card with a unique serial number that cannot be changed. Multiple encryption technology, uniquely identified, cannot be copied. And only the system is issued for approval.
(3) Non-contact smart tag card has no mechanical contact action when used, long-distance sensing communication, no directionality, the card can be read within the long-distance reading range of the reader, and the card can be completed while the vehicle is not stopping. The operation is convenient for the user.
(4) The gates are automatically raised and lowered according to the traffic conditions of the vehicles, and have the function of anti-smashing.
(5) Parking charges are counted and confirmed by the computer.
(6) The combination of computer network and charging software prevents illegal modification and unauthorized access to data.
(7) The management computer and each charging computer can realize real-time communication, and the management computer has an external interface, and the network has strong extensibility.
(8) Adopting the standard industrial control system structure, the configuration of different systems can be organized according to different requirements of users, which is convenient and flexible.
(9) Installation, commissioning and maintenance are simple and convenient, easy to replace and repair.
(10) The whole system has stable performance and reliable use.
Intelligent parking system workflow
The RFID system has advantages that other identification systems can't match. In addition, the anti-fouling and anti-wear performance of the data carrier in the RFID system is good, which is beneficial to improve the reuse rate of the carrier, increase its service life and reduce the use cost. Therefore, the intelligent parking lot management system uses a radio frequency identification system.
The operation process of the parking lot management system is based on the process of the customer parking and picking up the car. The workflow of the parking lot is always centered on the flow of the user's vehicles entering and leaving the parking lot. Parking users are generally divided into two categories: temporary users and fixed users. When the vehicle enters/exits the parking area of ​​the parking lot antenna, the antenna exchanges data with the vehicle radio frequency card in a microwave communication manner, reads the relevant information of the vehicle from the radio frequency card, automatically identifies the radio frequency card and determines whether the vehicle card is valid or not. Legitimacy, the lane control computer displays the license plate number and driver information such as the one-to-one correspondence with the RF card; the lane control computer automatically stores the relevant information of time, vehicle and driver into the database, and the lane control computer is based on unique The data is judged to make a decision to release or prohibit.
(1) Temporary users
Temporary users refer to users who temporarily use parking lots to park. The parking behavior of such users is generally temporary, random, and low-frequency. The potential number of temporary users is huge and the identity is uncertain.
(2) Fixed users
Fixed users refer to users who have fixed parking in the parking lot for a long time. The parking behavior of such users generally has the characteristics of long-term, regularity and high frequency of use. The fixed users are generally the staff of the units near the parking lot or the households in the living area, and the number is determined within a certain period of time.
For the parking lot users, the actual situation is divided into temporary users and fixed users. The system exit/entry process is also divided into two situations: temporary users and fixed users.
Vehicle appearance workflow
Temporary vehicle exit workflow
The user drives the vehicle into the parking lot exit passage and stops at the exit. After detecting the vehicle, the vehicle detector sends a signal to the exit controller. The camera system and the vehicle identification system are activated, the vehicle image is taken in, and after the vehicle identification system is analyzed, the license plate information, the color information, the model information, and the like are obtained; the user hands the user card obtained at the time of admission to the manager, and the manager reads through the exit. The card machine reads the user card ID information and reclaims the user card for recycling. The data center obtains the type (temporary card) and admission time of the user card by searching the corresponding ID number in the database, and queries the vehicle information related to the ID number in the database, and compares with the information obtained in real time, if not If it is met, it will refuse to release, and will give alarm information and error message. If it is met, the data center calculates the user's amount of payment according to the vehicle's on-site residence time and billing rate, and displays it on the amount display screen. The voice prompting device prompts the user to pay the amount. After the user pays the corresponding fee, the management personnel will The exit electric railing is opened by the exit controller, and the user drives out of the parking lot.
Long-term card vehicle appearance workflow
When the vehicle holding the long-term card user arrives at the parking lot exit, the card reader obtains the information of the card, sends the information to the data processing center, starts the vehicle image recognition system, determines the validity and password of the user card, and queries the data center. The information obtained by the information related to the ID number is compared with the information obtained by the vehicle identification system. If it is met, the exit controller is given a valid signal, and the exit controller controls the lifting of the outlet electric railing, and the user drives away from the parking lot. , complete an appearance process.
Intelligent parking lot management system design
Hardware system
The block diagram of the intelligent parking lot management system is shown in Figure 1. The intelligent parking lot management system data center controls the management of the entrance control system, the vehicle identification system, the security monitoring system, the user management system, and the exit control system. The main equipment of the intelligent parking lot management system are:
(1) Entrance control equipment, including automatic inlet card machine, entrance card reader, vehicle detector, electric railing, etc.;
(2) User charging terminal equipment, including computers, video capture cards, ticket printers, etc.;
(3) Data processing center equipment, including data servers, central card readers, communication equipment, etc.;
(4) Parking lot monitoring equipment, including surveillance cameras, video cards, displays, alarm devices, etc.;
(5) Export control equipment, including export card readers, vehicle detectors, electric railings, export voice prompting equipment, parking fee display equipment, etc.;
(6) Other equipment, including lighting equipment, ventilation equipment, etc.
Software system
Three-level operator system
The software system is divided into three levels: operator level, supervisor level, and manager level. Different levels correspond to different passwords entering the software system, so the software system has good confidentiality and reliability. Different levels of operators can implement different functions after entering the software system. The operator level can only implement basic functions; the supervisor level can implement other functions including the operator, and can modify the operator password; the manager level is the highest level operator, which can realize the operation level and supervisor level. All features and all operator passwords can be modified. The software system has good compatibility and data protection.
Image capture contrast
The image size, clarity, color and other parameters of the image can be set by themselves; the vehicle image can be viewed by the relevant personnel at any time. The total storage capacity of the image depends on the size of the hard disk. At least one week of vehicle access images (10,000 frames) can be guaranteed for future reference.
Temporary car charging function
When the temporary car leaves the parking lot, the controller can automatically detect the temporary card and prompts that a certain fee should be paid. Temporary vehicles must leave the parking lot after they have paid a certain fee and confirmed by the security guard. When the gate is opened, the digital video recorder captures the photo file of the vehicle and stores it in the computer.
Query, change data
Check all relevant information. For example: list of commonly used card materials, list of commonly used cards, list of operator passwords, list of temporary cards, etc.
Data printing
During the operation, the operator code and the operation content of the operation can be printed out immediately, and the printer prints out the entry/exit date, time, serial number, time, and operator code.
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