Case of automatic parking guidance system in the underground garage of Taiyuan South Railway Station
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Overview
Taiyuan City is located in the middle of the Loess Plateau in Shanxi, at the northern end of the Taiyuan Basin (also known as the Jinzhong Basin). As the capital of Shanxi Province, Taiyuan City is the political, economic and cultural center of the province, as well as one of the transportation hubs in North China.
The newly-built Taiyuan South Station will be the largest passenger station on the Shijiazhuang-Taiyuan Passenger Dedicated Line, and there will be two provincial and municipal rail transit lines passing through the station buildings, namely Metro Line 2 and Metro Line 4.
Taiyuan South Station has 16 tracks and 8 passenger platforms (including 2 basic platforms). Taiyuan South Station has 30 pairs of trains from the beginning to the end of the initial stage. It is predicted that in 2030, there are 62 pairs of trains from the beginning to the end, and the annual passenger volume will be sent. For 19.15 million people.
The new Taiyuan South Station will form a regional transportation hub together with the original Taiyuan Station, and it is also a milestone in the development of Taiyuan’s urban construction. One of the features of our winning proposal for this project is that it achieves a comprehensive integration of urban transportation and a reasonable division of planned land for construction. The goal is to form an organic whole between the exhibition halls and the internal and external spaces of the station and the urban space in a three-dimensional and layered manner. In order to effectively use the land, control the scale of the ground parking lot, make full use of the urban underground space, rationally organize the flow of people in the station, and plan underground. A large commercial shopping center and parking lot.
With the development of urban construction and the improvement of residents’ living standards, while cars are bringing people’s transportation faster and more convenient, the problem of parking difficulties has become more and more obvious. The demand for parking spaces in railway passenger terminal buildings and commercial places must be Increasingly, in the first phase of the underground construction of this project, three parking lots are planned for 1#, 2# and 3#, of which 1# parking lot parking 302 cars, 2# parking lot parking 302 cars, and 3# parking lot. There are 769 parking spaces, and a total of 1373 parking spaces in the three parking lots.
Introduction to the conventional parking lot automatic management system and its unsolved problems
For a parking lot of this scale, an automatic parking management system is indispensable. The conventional automatic parking management system is generally composed of inductive ID/IC cards and card issuing (reading) devices, entrance and exit control machines, and entrance and exit display screens. , Automatic barriers, ground sensing coils and vehicle detectors, management host and related software. Some parking lot automatic management systems also have image recognition functions, which can extract license plate text from license plate images, and some can also extract video features from vehicle body images. When vehicles enter and exit, they are compared with parking cards to achieve the effect of security and anti-theft.
The conventional automatic parking lot management system realizes the automation of vehicles entering and exiting the parking lot. It can also realize the display of the number of vacant parking spaces by comparing the number of vehicles entering and exiting with the total parking spaces of the parking lot. Its management software generally also has networking for entering and exiting vehicles. Automatic billing function.
Compared with the previous manual management of the parking lot, the conventional automatic parking management system realizes the quick and convenient vehicle entry and exit, but for the employees required for parking management, in addition to reducing the number of employees at the entrance of the parking lot, it cannot reduce the number of employees. Guide the employees needed for parking, especially for large underground parking lots. Due to the limited visibility, customers cannot understand the relevant information of the parking spaces. They spend a lot of time looking for empty parking spaces, resulting in a series of problems such as parking difficulties and long parking times. It is easy to cause vehicle congestion on the traffic lane. Although the working environment of the underground garage is very poor, a lot of noise and exhaust gas cannot be avoided, but in order to maximize the utilization rate of parking spaces and make it convenient for customers to park, the parking management company has to set up enough parking guides. Take a guide responsible for 50 parking spaces as an example (in fact, the number of parking spaces that each guide can effectively manage is far below this number), two shifts a day, the first phase of the underground construction of this project A, B, and C three The parking lot needs to be equipped with 28 parking guides, which is a considerable number, and personnel costs also account for a large proportion of parking operating costs. Even so, the customer experience is still poor, and the business philosophy of people-oriented and customer satisfaction cannot be realized.
The basic principle of automatic guided parking system
The guidance function of the conventional parking lot automatic management system can only display the total number of vacant parking spaces by comparing the number of vehicles entering and exiting with the total parking spaces of the parking lot through the charging software. It is still a passive management, and neither the manager nor the customer knows it. The specific distribution of current parking spaces and vacancies.
The construction of the automatic guided parking system of the parking lot should be guided by scientific planning, with the purpose of improving efficiency, being guided by actual needs, strengthening overall coordination, focusing on actual results, fully considering the status quo of the parking lot, unified planning, and increasing the utilization rate of parking facilities. Promote the equalization of facility utilization, reduce the time consumption of drivers looking for parking spaces, reduce exhaust emissions, noise and other pollution caused by long-term vehicles, so as to improve the environment, increase parking efficiency, and enhance the image of the parking lot.
The basic principle of the automatic guided parking system is to set a probe above each parking space to detect the occupancy of the parking space in real time, and connect it to the electronic map of the parking management computer for real-time display. After the toll system is verified, it is constantly refreshed and updated The data is optimized and the guidance signal is transmitted to the guidance indicator to guide the customer (driver) to quickly park the car to the designated space through the best route.
Application of Automatic Parking Guidance System in Taiyuan South Railway Station
Through demand analysis and comparison of multiple products, the underground garage parking automatic guidance system of the Taiyuan South Railway Station project is designed using the KEY parking automatic guidance system of Xiamen Ketuo Communication Technology Co., Ltd. The system selects entrances according to the actual number of entrances in the parking lot. Display screen, each entrance only needs one entrance parking space guidance display screen. This project has five entrances, and a total of 5 entrance display screens are required. An ultrasonic detector must be installed on the top of each parking space. Detection), a total of 1373 ultrasonic detectors are needed; consider setting up parking guide screens at intersections, so it is necessary to divide the parking spaces to be controlled by the node controller, and each node controller can theoretically connect up to 64 ultrasonic detectors. In the actual project, it is recommended that each node controller connect to 32 detectors. Therefore, a total of 44 parking space node controllers are configured in this system; the central controller can be selected according to the actual situation of the parking lot. In this system, the three parking lots are For unified management, only one central controller needs to be configured.
The setting of the parking guidance display screen in the system needs to be based on the site conditions, based on the principle of minimizing cost and maximizing functions, software simulation, and reasonable layout in locations where drivers may have directions in doubt, so that customers can optimally park their routes and arrive at vacant spaces. The shortest.
The functional principle of KEY parking automatic guidance system is shown in the figure:
The KEY parking automatic guidance system is mainly composed of the following parts:
(1) Entrance display screen: The entrance display screen is installed at the entrance of the parking lot to display the number of parking spaces in the entire parking lot and related parking lot information. The display screen is composed of high-brightness LED module, drive circuit, control circuit, bracket and other parts. It receives the output information of the central controller, displays the number of free parking spaces in the parking lot in digital and text form in real time, and prompts the drivers of vehicles who are ready to enter the venue. It can be used 24 hours a day. The internal program can also be modified at any time according to user requirements to display other information required by the user.
(2) Node controller: The node controller is the middle layer of the three-layer network bus of the parking lot guidance system, which plays an important role in ensuring the safety, reliability and efficiency of the system. The node controller is used to group and manage the detectors, realize the optimized management of network communication, and ensure the safety of the system; it cyclically detects the state of the detectors under its jurisdiction and transmits relevant information to the central controller.
(3) Parking space detector: a parking space detector is installed on the top of each parking space to detect whether the parking space is occupied. The parking space detector adopts the principle of ultrasonic ranging, which can reliably detect whether the vehicle is in the parking space, avoiding infrared, microwave, etc. The detection method is prone to false alarms caused by changes or interference in the external environment. The detector emits ultrasonic waves from top to bottom, analyzes the reflected waves from the car or the ground, and accurately measures the distance between the reflecting surface and the detector, thereby accurately detecting the parking situation of each parking space.
(4) Parking space guide screen: It is set at the fork of the parking lot to identify whether there are empty parking spaces in each area. If there are empty parking spaces, the indicator arrow is on and the number of remaining parking spaces is displayed. If there is no empty parking space, the indicator arrow is off . According to the guide screen, the owner can choose the parking location.
(5) Central controller (which can be replaced by PC): The central controller is the core of the entire system and is mainly used for the collection and control of the entire parking lot guidance system. A central controller can connect to 64 node controllers, so this project only needs one.
(6) LED parking space occupancy light: The LED parking space occupancy light is installed in front of each parking space to show whether the parking space is occupied. The green light will be on when the parking space is free, and the red light will be on when the parking space is occupied. The driver can check the LED in front of the parking space. Lights to find out if there are vacant parking spaces in a certain area at a longer distance.
In addition to realizing all the functions of the conventional automatic parking management system, the KEY parking automatic guidance system can easily achieve the following functions:
(1) Automatic guidance function: no parking guide is required, the display screen is automatically controlled, and the car is intelligently guided to quickly enter the idle parking space in the shortest time.
(2) Protection of fixed parking spaces: Special parking spaces such as fixed, monthly, and fixed parking spaces are reserved, and cars are not guided to enter.
(3) Real-time display of parking space status: Implement dynamic display of parking space occupancy, detect the usage status of each parking space, count the number of occupancy and vacancy of various open parking spaces, and count the number of vehicles entering and leaving the field during the time period. The condition of the entire parking lot is clear at a glance.
(4) Statistics function: It can count the daily and monthly usage rate of the parking lot, the usage rate by time period, etc.
(5) Parking time detection: After the car is parked in the parking space, it starts to count, and the parking situation of the parking space can be known at any time in the control room.
(6) Authority control: Multi-level authority control function facilitates the control and confidentiality of related information.
financial analysis
With the development of electronic technology, the cost-effectiveness of electronic products is getting higher and higher. The cost price of the automatic parking guidance system used in this project is less than 1 million yuan. The economic benefits generated, as well as the social benefits generated by customer convenience and improved service quality, are only 3 to 4 years compared with the reduction of 28 parking guides (the total annual cost of each employee is 10,000 yuan) All the investment can be recovered. Therefore, for this project, the economic and social benefits of the automatic parking guidance system are quite objective.
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