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On August 28, 2009, with the full support of the Dalian Municipal Party Committee, the Municipal Government and the Municipal Transportation Bureau, the Municipal Government allocated special funds, and the “Dalian Taxi Remote Electronic Identification System” was officially installed and implemented by Changchun Phoenix Huibang Technology Co., Ltd. start up. This indicates that Dalian City has achieved initial results in the identification and management of taxis by using RFID (Radio Frequency Identification) technology, and achieved phased application results. Provide valuable implementation experience for the establishment of RFID-based electronic supervision methods for motor vehicles in Dalian, intelligent transportation, and intelligent decision-making analysis of road conditions.
With the gradual improvement of the system, through the rational deployment of further reading and writing monitoring points, the construction of data mining and analysis systems and the technical support of a huge Internet network, the “Taxi Remote Electronic Identification System” has actively promoted the development of the intelligent transportation field in Dalian. Networking development.
The system adopts the most advanced RFID (radio frequency identification) technology and software technology in the country to build a comprehensive system suitable for Dalian taxi management. The system includes two aspects of comprehensive business processing and inspection. Through the establishment of a remote electronic identification system for taxis, a “dual-frequency vehicle identification card” was installed for 8,500 taxis in the urban area of Dalian, and 50 handheld inspection devices were deployed. Law enforcement officers use handheld devices to conduct inspections on the road, and their effective identification distance in motion is up to 80 meters. They can accurately determine the validity of documents and the legitimacy of vehicles in the first time, reducing inspection time and unnecessary disputes. At the same time, it can also assess the law enforcement index of law enforcement officers to avoid inaction. It can efficiently identify and accurately crack down on various illegal operating vehicles, regulate the operation of legal taxis, and effectively maintain the normal order of the urban passenger transport market. Relying on the system, it can also implement dynamic monitoring of car rental companies and grasp the operating conditions of taxi companies. Especially for abnormal situations such as frequent replacement of taxi cards and driver changes, the management department can promptly find out and investigate and deal with it to prevent large-scale problems. Strikes and other chain reactions.
Highlights of this application case:
Car identification card adopts dual-frequency technology (patent)
The vehicle identification card is the only legal identification affixed to operating taxis. The inspection system will use it to read vehicle information from a long distance to determine the legitimacy of the vehicle.
This dual-frequency technology mode avoids the inherent shortcomings of single-frequency label management in the past, and not only achieves long-distance regional multi-vehicle recognition, but also achieves the purpose of short-distance targeted bicycle management. Aiming at the analysis of the management mode of the domestic taxi industry, a dual-frequency reading and writing method combining active 2.45GHz and passive 920-925MHz is adopted. Performance advantages of dual-frequency electronic tags:
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category |
Advantage description |
|
Identification method |
Combination of long-distance regional multi-vehicle recognition and short-distance target bicycle management |
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Recognition distance |
915MHzThe recognition distance is<12rice(efficient0-5rice) 2.45GHzThe recognition distance is<120rice(effective distance100rice) |
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Recognition speed |
915MHzVehicle speed<40KM/Hours, suitable for close-range targeted bicycle management 2.45GHzVehicle speed<200KM/Hours, suitable for long-distance regional multi-vehicle recognition |
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safety |
Encryption algorithm and authentication to prevent link eavesdropping and data cracking |
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Directionality |
915MHzLinear polarization, target recognition;2.45GHzCircular polarization, regional recognition |
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power supply |
915MHzPassive tags do not need maintenance, data double backup guarantee2.45GHzInternal faults are well documented. 2.45GHzActive label (6-8year). |
With electronic identification technology of disassembly state (patent)
The vehicle identification card is equipped with electronic identification technology of the disassembly state, and actively transmits the disassembly signal. And can be read. Even if the disassembled chip is repaired and restored with exquisite circuits, the system can still determine that the card is an illegal card and can track the disassembled label. This technology effectively distinguishes whether the identification card is artificially damaged, and whether it is malicious substitution or application by criminals.
With high performance and high complementarity
The passive tag of the vehicle identification card used in this project has a service life of more than 10 years; the battery life of the active tag can reach more than 8 years. And when the battery of the active device is out of power, the passive device can still work, and the electronic tag can continue to function. So as to ensure the quality of the electronic label itself.
Measures for handling disputed vehicles such as malicious card replacement
It is normal to replace the card due to loss or damage. However, some illegal operators maliciously supplemented their cards in order to obtain a legal “talisman” for the licensed vehicles. In this regard, after 6 years of research, Phoenix Huibang has formulated a complete set of effective solutions. The realization of an intelligent online analysis mechanism is mainly through the three steps of “data warehousing-online analysis-data mining” to analyze the on-board identification card change data and audit data of this project, and through data association, cluster analysis, classification, prediction, and time series mode And deviation analysis.
Emergency Decision Support System
The GIS system of the command center will monitor every taxi with GPS in real time. When a large number of taxis gather, the GIS system will automatically send instructions to the vehicle-mounted inspection vehicles. The on-board inspection system informs the inspectors through voice prompts, and automatically designs the best driving route to reach the location of the incident as soon as possible. At the same time, the remote electronic identification system can quickly extract crowded vehicle information, vehicle owner information and company information. Can provide information decision support at the first time.
Intelligent road guidance system
Utilizing the “ubiquitous” taxi driving characteristics, real-time monitoring and reporting of road condition information can be realized through electronic dredging devices such as road condition LED displays, prompting drivers to avoid peak sections and construction sections, rationally planning road emergency traffic conditions and reasonable optimization Divert traffic and solve road congestion.
Traffic signal intelligent control system
After analyzing the long-term accumulated monitoring data, real-time monitoring of the running speed and driving path of taxis and buses in the city can accurately grasp the overall traffic flow and conditions of the city, and realize the intelligent control system of traffic signals. Therefore, the traffic signal lights at a certain intersection can be controlled to realize the bus advance mechanism; the traffic signal lights at a certain time period can be controlled to automatically adjust the mechanism according to the road conditions and the traffic flow; the main road green light traffic mechanism can be realized during the idle time of the road. These timely and accurate road conditions information will surely provide convenience for urban traffic management.
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