Solutions for parking lot passage management and parking space guidance
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With the vigorous development of my country’s information industry, on the one hand, computer technology, automatic control technology and data transmission technology have been developed very rapidly in recent years, various information undertakings are in the ascendant, and various identification carriers are becoming more abundant; on the other hand, On the one hand, due to the improvement of living standards and safety awareness, people have created new demands for the safety of parking management and the convenience of parking. In addition to the management of entry and exit passages in the parking lot management system, how to guide the driver to park conveniently is also an important part of parking management. This article attempts to strengthen the safety management of the entry and exit passages of the parking lot, guide the parking spaces on the parking lot, and save energy in the parking lot. From the aspect, we will explain an intelligent parking system in a complete sense.
Application Analysis
At present, many existing parking management systems on the market simply manage the entrance and exit passages of the parking lot. In fact, a complete parking lot management system should also include such elements as parking space guidance and energy-saving control. In order to achieve the purpose of safety management of the entrance and exit, vehicle guidance and energy-saving control, we use the entrance and exit to install license plate recognition equipment and various radio frequency management equipment to realize a complete parking lot management system application.
1. Equipment composition:
1. Channel management equipment: channel controllers, entrance ticket boxes, card readers, automatic barriers, vehicle detection coils, cameras, video capture cards, electronic displays, high-speed receipt printers, voice modules, etc.
2. Parking guidance equipment: guidance controller, LED parking guidance screen, parking indicator, parking guidance signal indicator, etc.
3. Energy-saving control equipment: geomagnetic detector, street lamp lighting control module.
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2. Process analysis:
1. Vehicle admission process:
1) Before entering the parking lot, the car owner learns about the parking lot’s free space and other information through the external electronic display device of the parking lot. After the car takes the card or takes the card through the automatic card dispenser, the system first performs identity authentication (legality, validity period, etc.). Then start the camera to capture the whole car image and the partial car image suitable for license plate recognition, apply the license plate recognition technology to identify the license plate number from the captured partial car image, convert the graphic information into a text signal, and then the system automatically assigns it according to predefined rules For a parking space, the vehicle owner will be notified of the allocated parking space at the same time through the entrance LED display screen and the voice module sound effect output. Finally, the system records the entry process in the database, opens the gate and releases, and activates the vehicle guidance system in the venue. .
2) Send the license plate number and driving direction information recognized from the captured partial car pictures when entering the venue to the LED guide screen corresponding to the driving route in the parking space in the venue. When the vehicle enters, the owner will follow the direction indicated on the LED guide screen When driving, guide the vehicle to the allocated parking space;
3) During the driving process, when the vehicle drives on the geomagnetic detector, the street light lighting control module immediately triggers to turn on the corresponding field lighting street lights according to the preset settings. When the vehicle leaves the geomagnetic detector, the control module will delay a certain amount of time Automatically turn off lighting street lights at time;
4) After the parking space detector detects that the vehicle has entered the parking space, the system updates the parking space occupancy status, and immediately synchronizes the electronic map or updates the large-scale LED parking lot simulation display; in addition, it can also control the light line guidance system, open the parking space lock or Application of parking lights and other functions.
2. Vehicle exit process:
When the vehicle leaves the field, similarly when the vehicle drives on the geomagnetic detector, the street light lighting control module will be triggered to turn on the corresponding field lighting street light. When the card is read at the exit, the system must first perform identity authentication, and then start the camera to capture the whole picture. The car map and the partial car map suitable for license plate recognition, and then call the whole car map of the entry and exit for manual assisted comparison, and then identify the license plate number according to the partial car map of entry and exit for automatic comparison, and finally pass The toll display screen and voice prompt the parking fee, and then complete the record of the exit data and release the gate.
Access management security mechanism
Channel entry and exit management mainly realizes the functions of identity authentication, recording of various events, parking billing and vehicle safety precautions. Among them, vehicle security is a very important part of the entire system. It can be understood as two aspects of vehicle traffic safety and vehicle anti-theft. For vehicle traffic safety, currently it is usually implemented through vehicle anti-turn and anti-collision mechanisms; For vehicle anti-theft and other aspects of security, it can be achieved through various means such as comparison of the entry and exit vehicle map, dual card authentication, anti-following mechanism and license plate recognition technology.
The following safety mechanisms can be used to ensure the safety of vehicle entry and exit management:
1. Video monitoring and graphic monitoring: real-time video monitoring channel status, real-time graphic monitoring of various vehicle entry and exit events and alarm events; when an alarm is generated, it will give an alarm in multiple ways such as text, sound effects and visual warning lights;
2. Image comparison or license plate recognition: Image comparison realizes automatic comparison of the whole vehicle pictures captured at the entrance and exit places for manual comparison; license plate recognition realizes automatic recognition of the license plate number from the partial car pictures captured at the entrance and exit places for comparison Yes, it usually needs to be able to meet the triggering of multiple shooting conditions, multiple matching methods for license plate comparison, and multiple processing methods when matching fails;
3. Anti-following and anti-reversing: Anti-following can effectively prevent the next illegal vehicle from following after the previous legal vehicle swiped its card to open the gate. It judges the number of vehicles passing through the passage and the number of valid cards read. Whether the difference is greater than zero to determine whether a car following phenomenon occurs; anti-reversing can effectively prevent the vehicle from entering the passage and the system is released after the vehicle is released from the passage;
4. Dual card authentication: dual card authentication realizes two card authentication of human card and vehicle card. Only when the human card and vehicle card are read at the same time within a certain period of time can they pass effectively, so that the owner and the vehicle can be matched to effectively achieve theft prevention The requirements;
5. Single-channel signal light control: suitable for those applications where the width of the aisle can only accommodate a car body and the entry and exit are the same passage, to ensure one-way traffic in the passage at a certain time to prevent vehicle jams;
6. Traffic strategy management: Customize the designated user’s access authority in the designated time period and designated channel, customize the traffic route and parking space allocation mechanism under multi-channel conditions, and give multiple methods of alarm for blacklisted vehicles entering and exiting;
7. Offline operation capability: the access channel management system should be able to provide solutions for channel access and parking fee management under the conditions of mains failure and network failure;
8. Multiple charging methods: various charging methods such as yearly, monthly, scheduled, timed, counted, and time-sharing can be provided for different types of users, realizing pre-charge management mode or temporary charging management mode;
Other aspects such as intelligent gate control, multiple cards in one vehicle, interface design and trigger card reading can be used to improve the safety and efficiency of passage in and out.
Parking guidance management
Parking guidance is to realize the process of guiding the vehicle to a specific parking space allocated by the system. It can be guided by street lights or electronic display screens. It consists of a parking guidance controller and some guidance indicators or parking guidance screens. This requires pre-setting a route between the channel and the target parking space on the electronic map in the application software. For the street lamp route guidance method, the guidance of parking spaces is realized by defining the corresponding controller output and output delay time of each street lamp on this route; while for the electronic guidance screen guidance method, it is by defining on this route The address of each parking space guide screen and the arrow point to the information. Parking guidance screens are usually installed at intersections of roads in parking lots. It has optional display lines and display modes. Existing applications usually use three lines per screen and two screens dynamically switch display, that is, each parking space guide The screen always cyclically displays the guidance information of the latest six vehicles.
Parking guidance can be explained in two parts:
The first part is the prompt given on the electronic display screen when the vehicle enters the venue. After the system allocates parking spaces to the vehicle, it can give the following multiple prompts:
Method 1: Please park at XXXX parking space; Method 2: Please park + area name + XXXX parking space
Method 3: License Plate Number + Please Stop + XXXX Parking Space Method 4: License Plate Number + Please Stop + Area Name + XXXX Parking Space
The second part is the parking guidance process in the venue. When the vehicle enters the venue, the system displays the parking guidance information on the parking guidance screen of the route according to the pre-set route. It can also have a variety of guidance methods to choose from:
Method 1: Please park at XXXX parking space
Method 2: Please park+area name+XXXX parking space
Method 3: License plate number + please stop + XXXX parking space Method 4: License plate number + please stop + area name + XXXX parking space
In the above prompt method, if equipped with a license plate recognition module, it will display the license plate number recognized from the vehicle entry picture, otherwise, it will be the license plate number registered in the database.
Parking lot energy saving control
At present, there are a large number of underground parking lots in the society. In these parking lots, electricity is used to realize the lighting in the parking lot. So long-term electric lighting will inevitably bring about huge energy waste and management costs. The energy-saving control of the parking lot is mainly through the parking management system to rationally solve the lighting management in the parking lot and reasonably solve the energy-saving problem.
When the vehicle enters the parking lot and is driving, when the vehicle drives on the geomagnetic detector, the street light lighting control module immediately triggers to turn on the corresponding field lighting street lights according to the preset settings. When the vehicle leaves the geomagnetic detector, the control module will delay The lighting street lights are automatically turned off for a certain period of time. At the same time, flashing signal lights at the corresponding allocated parking spaces to cooperate with the parking space guidance, so that the vehicle can find the parking space that needs to be parked in the shortest time, and improve the parking efficiency of the parking lot. At the same time, it also reduces the exhaust emissions when vehicles are parked in the underground parking lot, which is conducive to maintaining a good environment in the parking lot.
Concluding remarks
Economic development heralds the advent of the automobile age. The increase in social car ownership will also require higher and higher social parking management and service requirements. The entry and exit management security mechanism, parking guidance management, parking lot energy-saving control and other technologies described in the article Will be more used in modern parking systems.
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