CN102750747A

CN102750747A - Wireless unmanned parking lot management system

Info

Publication number: CN102750747A
Application number: CN2012102273451A
Authority: CN
Inventors: 李智; 李笑涛; 褚小川
Original assignee: Sichuan University
Current assignee: Sichuan University
Priority date: 2012-07-04
Filing date: 2012-07-04
Publication date: 2012-10-24

Abstract

The invention discloses a wireless unmanned parking lot management system which is capable of monitoring vehicles through module nodes with anisotropic magnetoresistive (AMR) sensors under a wireless sensor network technical system, transmitting data of the sensors and networking among the module nodes through a wireless network and detecting and identifying vehicles, thus achieving the effects of automatic berth instruction, parking guidance and charge management under the condition of unmanned management. The wireless unmanned parking lot management system is characterized in that the vehicles are detected and identified by the AMR sensors; a zigbee network and a general packet radio service (GPRS) network are connected with the bottom nodes and a computer; and the computer controls a parking lot in-and-out gate and the display of an information screen. The system can automatically run under artificially set rules, and the whole process of the system is not required to be controlled by workers.

Description

Wireless type unmanned managing system of car parking

Technical field

The present invention is through having the module node monitor vehicle of magnetoresistive transducer (AMR) under the technical system of wireless sensor network; Utilize wireless network to realize networking between sensing data transmission and each module node; Realization is to vehicle detection and identification; Thereby reach the automatic parking stall indication under the unattended condition, stopping guide and toll administration.

Background technology

Since rapid economic development, the raising of living standards of the people, and China's vehicle fleet size hits new peak repeatly.According to the medium statistics, by in by the end of June, 2011, the total recoverable amount of national motor vehicle reaches 2.17 hundred million.Wherein, 9,846 ten thousand in automobile, 1.02 hundred million in motorcycle.Data presentation, 11 city automobile recoverable amounts such as Beijing, Shenzhen, Shanghai, Chengdu, Tianjin surpass 1,000,000, and wherein, Beijing just reaches 4,640,000.The explosive growth of vehicle number purpose causes a large amount of parking lot demands.At present, most parking lots all are to adopt labor management pattern and video surveillance management pattern, have many shortcomings.

The major defect of labor management is:

1. need payment management employee money, and the difficult whole day that realizes was managed in 24 hours

2. the benefit loss that careless omission or respect persons cause appears easily

3. it is relatively poor the parking lot real-time condition to be grasped situation

The major defect of video surveillance management is:

1. receive natural conditions factor affecting such as weather easily

2. equipment cost costliness and maintenance cost are high, inconvenient installation

3. receive cost restriction placement monitor in a large number, leaky in the management

4. higher to the identification False Rate of vehicle

Under the current market demand, the unattended method that exploration is carried out green intelligence to the parking lot becomes a developing direction with practical significance.

Summary of the invention

The objective of the invention is to invent a kind of intelligent parking course management system the vehicle that passes in and out the parking lot is detected automatically, discerns, and in time identifying information is transferred to data center based on wireless sensor network technology (AMR magnetoresistive transducer).Whole process is also carried out fully automatically in real time.

Its major advantage is:

1. need not manual intervention, cost and support price are cheap, and can round-the-clock 24 hours operate as normal

2. easy for installation, detection and Identification rate height

3. can arrange the seamless management of realization in a large number to the parking lot

Technical scheme introduction of the present invention is following: the hardware of this system is formed and is comprised node module (parking stall node, access point node, bridge node and gateway node; All have the zigbee wireless data transmission module; Wherein gateway node also has the GPRS module), the inlet parking space information shows LED display, stopping guide indication LED display screen (display screen has the zigbee wireless data transmission module) and data center computer.

Described wireless data transmission module adopts the 2.4G frequency range, uses the Zigbee radio network technique, and based on the wireless senser of IEEE 802.15.4 standard agreement, GPRS network uses SIM cards of mobile phones to insert, and data center computer then is common personal computer.

The system works principle is following: the gateway module keeps duty; Surrounding environment is monitored; When Ingress node recognizes vehicle entering parking lot; Its magnetic signature data are arrived bridge node through wireless network transmissions, and bridge node is transferred to gateway node with data, and gateway node is passed data back be connected on the Internet data center computer through GPRS network and carried out data analysis.Having under the situation of vacant parking stall, computing machine sends steering order, and the operation banister distributes the parking stall, and indicates guided vehicle to stop through the LED screen to the parking route.After vehicle at rest, parked vehicles data (parking stall, vehicle, berthing time etc.) are carried out recording storage in the data center computer database.When vehicle left, corresponding parking stall node sent data to computing machine, and computing machine receives the back outlet banister is operated, and accomplished that the parking stall is reclaimed, actions such as vehicle toll (by the RFID device that is arranged on the exit completion of swiping the card) and outbound.In addition, computing machine will be added up the data that all nodes are passed back, and to parking position situation real-time statistics, and feedback when Occupied, stops the vehicle warehouse-in automatically on the LED display curtain of inlet.

In above-mentioned hardware systems, need be in the gateway, parking lot and each parking stall sensor installation module node all, in addition, bridge node, gateway node that some also need be set in the parking lot are to accomplish the wireless network data transmission.Parking position indicated number screen is equipped with in the porch, the other stopping guide indicated number screen that some is housed of an inside lane.For guaranteeing safety, can also a video monitoring respectively be set at the place, gateway.

On the software architecture, this system can be provided with the standard vehicle template parameter of vehicle identification on data center computer, is provided with to keep the parking stall and expenses standard is set, service time or the like.

Description of drawings

Fig. 1, Fig. 2 parking lot schematic layout pattern

Fig. 3 vehicle is to the interference synoptic diagram of terrestrial magnetic field

Fig. 4 system architecture synoptic diagram

Fig. 5 system works synoptic diagram

Fig. 6 node hardware structure synoptic diagram

Fig. 7 vehicle detection schematic diagram data

Fig. 8 sensor vehicle detection output synoptic diagram.

Embodiment

With reference to Fig. 1: the parking stall node is arranged in the headstock place, because here near vehicle motor, the disturbance of magnetic field that vehicle produces is big, is easy to detect.When on the parking stall during no vehicle, sensor output a fixed value A among a small circle in shake, when on the parking stall vehicle being arranged, vehicle will make sensor output marked change to the B value to the interference of terrestrial magnetic field, after vehicle leaves, sensor is exported will drop to the A value from the B value again.Its process such as Fig. 8, shown in Figure 9.When sensor was output as A, system is judged on the parking stall did not have car, and when sensor was output as B, system is judged on the parking stall had car.

With reference to Fig. 2: the place sets out Ingress node in the gateway, parking lot, and when vehicle was detected, sensor can be given computing machine with report information, by computer judges parking lot situation and order gate to produce corresponding actions.After vehicle at rest, computing machine will send instruction and upgrade the information on the inlet parking space information demonstration LED display.

With reference to Fig. 3: this figure has explained the interference effect of vehicle to the terrestrial magnetic field, is the theoretical foundation that magnetoresistive transducer detects vehicle.

With reference to Fig. 4: the system architecture diagram that this paper designed.Adopt the problem that can solve the restriction of zigbee wireless transmission distance after the GPRS mode, make the keeper that computing machine is connected can stay indoors behind the net and just can carry out daily management the parking lot.

With reference to Fig. 5: this paper system works synoptic diagram, by parking stall node detection parking stall situation and to the bridge node report, bridge node is sent to gateway node with data, by gateway node with real-time Data Transmission to data center computer.

With reference to Fig. 6: the hardware structure of having listed each node.

With reference to Fig. 7: enumerated the car sensor data that obtain in the experiment.

With reference to Fig. 8: sensor vehicle detection output synoptic diagram, among Fig. 8 last figure be vehicle near situation, figure below is the situation that vehicle leaves.

Claims

1. wireless type unmanned managing system of car parking; It is characterized in that: utilization is arranged in the node module that reaches in gateway, parking lot, the parking lot on the parking stall vehicle detection and guiding is stopped; System is through the zigbee tissue and adopt the GPRS method to be connected with personal computer, by computer control whole parking lot operation.

2. node module according to claim 1 is characterized in that: have magnetoresistive transducer, adopt the MCU and the wireless zigbee digital transmission module of low-power consumption, can use powered battery.

3. data center computer according to claim 1, its effect is: receive the information of each node report and control gateway gate and information display screen, on the software parking stall management method, expenses standard and parking lot service time can be set flexibly.